Technical field
[0001]
　The present disclosure relates to devices and methods.
Background technique
[0002]
　In 3GPP (3rd Generation Partnership Project), various techniques for improving the system throughput is discussed. In order to improve the system throughput, to increase the frequency to be used it can be said that most of the shortcut. In 3GPP, in Release 10 and Release 11, carrier aggregation (Carrier Aggregation: CA) that the technology has been examined. CA, by using a bundle of component carriers having a bandwidth of 20 MHz, a technique of improving system throughput and maximum data rate. To adopt the technique of this CA requires a frequency band available as CC. Therefore, a further frequency band available for wireless communication of a cellular system is required.
[0003]
　For example, Japanese Patent Document 1, in addition to the dedicated frequency band allocated to the dedicated for each operator, and the operator is enabled registered frequency bands registered, available unlicensed when a predetermined condition is satisfied technology that enables the use of the band is disclosed.
CITATION
Patent literature
[0004]
Patent Document 1: Japanese Unexamined Patent Publication No. 2006-094001
Summary of the invention
Problems that the Invention is to Solve
[0005]
　However, for example, another wireless communication (e.g., wireless communication of the wireless LAN (Local Area Network)) the frequency band used for, can also be used for wireless communication of a cellular system, can result not various undesirable . That is, sharing the frequency band between the wireless communication with another wireless communication cellular system (share) can lead to results not different undesirable.
[0006]
　As an example, above the said frequency band is too be used for wireless communication of a cellular system, said frequency band is above other available opportunities for wireless communications is significantly reduced. Therefore, sharing of the frequency bands may become detrimental to the another wireless communication.
[0007]
　As another example, device of the cellular system is not always possible to secure the frequency band for wireless communication of the cellular system. Therefore, time to start using the frequency band for wireless communication of the cellular system can take.
[0008]
　As yet another example, when the frequency band is used in the cellular system, interference between the wireless communication with the another wireless communication of the cellular system in the frequency band may occur. Therefore, communication quality of the radio communication and / or the other radio communication of the cellular system may be reduced.
[0009]
　Therefore, the mechanism that makes it possible to more appropriately used in the cellular system frequency band is shared between the wireless communication with another wireless communication cellular system is provided is desirable.
Means for Solving the Problems
[0010]
　According to the present disclosure, a frequency band is shared between the wireless communication with another wireless communication cellular system, for a first period of time, occupied for the wireless communication of the cellular system, the frequency band at least, for a second period corresponding to the first period, the control unit to release from the wireless communication of the cellular system, apparatus comprising a are provided.
[0011]
　Further, according to the present disclosure, by the processor, a frequency band is shared between the wireless communication with another wireless communication cellular system, for a first period of time, occupied for the wireless communication of the cellular system , the frequency band, at least, for a second period corresponding to the first period, to release from the wireless communication of the cellular system, the method comprising the is provided.
Effect of the invention
[0012]
　According to the present disclosure as described above, comprising a frequency band is shared between the wireless communication with another wireless communication cellular system can be more appropriately used in the cellular system. Incidentally, the above effect is not necessarily limiting, together with the effect, or in place of the effect, any of the effects set forth herein, or other effects that may be understood from the description Kanade it may be.
Brief description of the drawings
[0013]
[1] is an explanatory diagram for explaining the frame format of IEEE 802.11.
FIG. 2 is an explanatory diagram for explaining the LTE frame format.
3 is an explanatory diagram showing an example of a schematic configuration of a cellular system according to an embodiment of the present disclosure.
FIG. 4 is an explanatory diagram for explaining an example of a communication area of a wireless LAN overlapping with small cell.
FIG. 5 is an explanatory diagram for explaining an example of a communication area of a wireless LAN overlapping with macrocells.
6 is a block diagram showing an example of a configuration of a base station according to the first embodiment.
7 is an explanatory diagram for explaining a first example of a period of occupation and release of shared bandwidth.
8 is an explanatory diagram for explaining a second example of the period of occupation and release of shared bandwidth.
9 is an explanatory diagram for explaining a third example of a period of occupation and release of shared bandwidth.
FIG. 10 is an explanatory diagram for explaining a fourth example of the period of occupation and release of shared bandwidth.
11 is a block diagram showing an example of a configuration of a terminal apparatus according to the first embodiment.
12 is a flowchart showing a first example of a schematic flow of processing according to the first embodiment.
13 is a flowchart showing a second example of a schematic flow of processing according to the first embodiment.
14 is a flowchart illustrating a third example of a schematic flow of processing according to the first embodiment.
15 is a flowchart showing a fourth example of a schematic flow of processing according to the first embodiment.
16 is a block diagram showing an example of a configuration of a base station according to the second embodiment.
FIG. 17 is an explanatory diagram for explaining the timing of transmission of the signal.
FIG. 18 is an explanatory diagram for explaining an example of the transmission of the dummy signal.
19 is a block diagram showing an example of a configuration of a terminal apparatus according to the second embodiment.
FIG. 20 is a flowchart showing a first example of a schematic flow of processing according to the second embodiment.
21 is a flowchart showing a second example of a schematic flow of processing according to the second embodiment.
22 is a block diagram showing an example of a configuration of a base station according to the third embodiment.
[23] The dummy signal is an explanatory diagram for explaining an example of a part of the resource blocks to be transmitted (RB).
It is an explanatory view for explaining an example of a resource element the dummy signal is transmitted (RE) in FIG. 24 Some of the resource blocks (RB).
[FIG. 25] is an explanatory diagram for explaining an example of a part of the resource elements dummy signal is transmitted (RE) in each resource block (RB).
[Figure 26] dummy signal by a plurality of terminal apparatus is an explanatory diagram for explaining a first example of a radio resource to be transmitted.
[27] The dummy signal by a plurality of terminal apparatus is an explanatory diagram for explaining a second example of the radio resource to be transmitted.
[FIG. 28] is a block diagram showing an example of a configuration of a terminal apparatus according to the third embodiment.
FIG. 29 is a flowchart illustrating an example of a schematic process flow of the base station according to the third embodiment.
[FIG. 30] is a flowchart illustrating an example of a schematic process flow of the terminal device according to a third embodiment.
It is a block diagram showing a first exemplary configuration of FIG. 31] eNB.
Is a block diagram showing a second example of FIG. 32 schematic configuration of eNB.
[33] is a block diagram showing an example of a schematic configuration of a smart phone.
FIG. 34 is a block diagram illustrating an exemplary configuration of a car navigation system.
DESCRIPTION OF THE INVENTION
[0014]
　With reference to the accompanying drawings, it will be described in detail preferred embodiments of the present disclosure. In the specification and the drawings, components having substantially the same functional configuration are repeated explanation is omitted by referring to the figures.
[0015]
　The description will be made in the following order.
　1. Introduction
　2. Schematic structure of the system
　3. The first embodiment
　　3.1. Summary
　　3.2. Configuration of the base station
　　3.3. Configuration of the terminal equipment
　　3.4. Processing of flow
　　3.5. Modification
　4. Second embodiment
　　4.1. Summary
　　4.2. Configuration of the base station
　　4.3. Configuration of the terminal equipment
　　4.4. Processing of flow
　　4.5. First modification
　　4.6. Second modification
　　4.7. Combination of the second embodiment and the first embodiment
　5. Third embodiment
　　5.1. Summary
　　5.2. Configuration of the base station
　　5.3. Configuration of the terminal equipment
　　5.4. Processing of flow
　　5.5. Modification
　　5.6. The combination of the third embodiment and the first embodiment / the second embodiment
　6. Applications
　　6.1. Application on the base station example
　　6.2. Applications on the terminal apparatus
　7. Summary
[0016]
　<< 1. First >>
　First, with reference to FIGS. 1 and 2, the shared frequency band, the technology wireless communication based on wireless LAN standards, and the wireless communication technology of the cellular system is described.
[0017]
　(Frequency band sharing)
　further frequency band available for wireless communication of a cellular system is required. For example, radio communication cellular system (hereinafter, referred to as "cellular communication") as the frequency band used for, 5 GHz band is considered.
[0018]
　However, 5 GHz band, wireless communication based on a wireless LAN standard (hereinafter, referred to as "wireless LAN communication") being used for. Therefore, if the cellular system uses the 5GHz band, for example, 5GHz band is shared between the cellular communication and wireless LAN communication (share). More specifically, for example, 5 GHz band frequency band (e.g., channel of the wireless LAN) is, in a certain time is used for wireless LAN communication, it is used for cellular communications at different times. This improves the frequency utilization efficiency of the 5GHz band. Note that the wireless LAN standard, IEEE 802.11a, 11b, 11g, 11n, include 11ac and 11ad, these standards are characterized by employing a IEEE802.11 as the MAC layer.
[0019]
　Apparatus for performing wireless LAN communications, has spread already widely in the world. Therefore, from the viewpoint of backward compatibility (Backward Compatibility), rather than operation of the device that performs wireless LAN communication is changed, a mechanism for sharing a frequency band between cellular communications and wireless LAN communication, LTE been studied as a technique (Long Term Evolution), it is desirable that defined as LTE new standards. The above conform to the new standards terminal device is using the frequency band to be shared, the terminal device that does not conform to the new standards, would not use a frequency band is shared.
[0020]
　LTE, the LTE-Advanced or cellular system conforming to the communication standards equivalent thereto, the frequency band is shared, for example, component carriers: it will be used as (CC Component Carrier). Further, the frequency band for the cellular system is used as a PCC, the frequency band that is shared is to be used as the SCC, is envisioned. Further, the control signal and a data signal using a frequency band for cellular systems are transmitted and received, the data signals may be transmitted and received using a frequency band is shared.
[0021]
　(Wireless communication technology conforming to wireless LAN standards)
　with reference to FIG. 1, as a technique of wireless communication based on a wireless LAN standard, for explaining the frame format of IEEE 802.11. Figure 1 is an explanatory diagram for explaining the frame format of IEEE 802.11.
[0022]
　In IEEE 802.11, DATA frame and ACK frame is a basic frame. ACK frame, when the DATA frame was received correctly, a frame for informing the successful reception of the DATA frame to the transmitting side. The DATA frame and ACK frame only by the wireless LAN communication can be performed, in general, are more RTS (Request To Send) frame, and CTS (Clear To Send) 2 single frame of a frame is used.
[0023]
　Each terminal device that performs wireless LAN communication, prior to transmitting the RTS frame, during a period called DIFS (DCF (Distributed Coordination Function) InterFrame Space), a signal to confirm that it is not transmitted. This is referred to as a carrier sense. When each terminal device starts to transmit signals simultaneously when the DIFS has elapsed, signals collide. Therefore, each terminal apparatus waits a back-off time randomly set for each terminal device, the signal also during a back-off time to send a signal if it is not sent.
[0024]
　Basically, the terminal, while detecting any of the signals can not transmit a signal. However, since there exists an hidden terminal problem, RTS frame and the CTS frame includes a duration (the Duration) field for NAV (Network Allocation Vector) that the value set has been added. Based on the values ​​contained in the duration field, NAV is set. Terminal device to set the NAV is, refrain from the transmission of the signal over a period of the NAV.
[0025]
　First, a first terminal apparatus that transmits DATA frames transmits an RTS frame. Then, another terminal device located around the first terminal device receives the RTS frame, to obtain the value contained in the duration field in the RTS frame. Then, the other terminal device, for example, its NAV, and set the obtained above value, refrain from transmitting the signal over the life of the NAV. For example, the NAV period is a period from the end of the RTS frame to the end of the ACK frame.
[0026]
　The second terminal apparatus that receives DATA frames, in response to reception of the RTS frame, after the completion of the RTS frame by SIFS (Short InterFrame Space), and transmits the CTS frame. Then, another terminal device located in the periphery of the second terminal device receives the CTS frame, to obtain the value contained in the duration field in the CTS frame. Then, the other terminal device, for example, its NAV, and set the obtained above value, refrain from transmitting the signal over the life of the NAV. The NAV period is a period from the end of the CTS frame to the end of the ACK frame. Thus, for example, although not in the vicinity of the first terminal device, the other terminal device in the vicinity of the second terminal device (i.e., a hidden terminal for the above-mentioned first terminal device), said first transmitting a signal during a communication with one of the terminal device and the second terminal device, it can be prevented.
[0027]
　Incidentally, RTS frame includes in addition to the duration field, a frame control field, a receiving address field, transmission address field and FCS and (Frame Check Sequence). Further, CTS frame includes in addition to the duration field, a frame control field, a receiver address field and FCS.
[0028]
　In addition, DIFS and SIFS in IEEE802.11 series standards has, for example, the following of such length.
[0029]
[Table 1]

[0030]
　(Wireless communication technique cellular system)
　(a) frame format
　with reference to Figure 2, illustrating the LTE frame format. Figure 2 is an explanatory diagram for explaining the LTE frame format.
[0031]
　First, In LTE, the unit of time that the radio frame (Radio Frame) is used. One radio frame is 10 ms. Individual radio frame is identified by the SFN (System Frame Number) is any one of 0-1023.
[0032]
　Radio frame includes 10 subframes each of which is identified by the # 0 to # 9. Each sub-frame is 1ms. Furthermore, each subframe includes two slots, each slot include, for example, seven OFDM (Orthogonal Frequency Division Multiplexing) symbols. That is, each sub-frame includes 14 OFDM symbols. The frame format shown in FIG. 2 is a frame format of a downlink frame format for uplink, comprising instead, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols of the OFDM symbol.
[0033]
　(B) carrier aggregation
　- the component carrier
　in the carrier aggregation of release 10, up to five of the component carrier (CC) are bundled in, it is used by the UE (User Equipment). Each CC is the bandwidth of the maximum 20MHz wide. In carrier aggregation, there is a case where the case of CC continuous in the frequency direction is used, the CC apart in the frequency direction is used. In carrier aggregation, it is possible to set the CC to be used for each UE.
[0034]
　-PCC And SCC
　in the carrier aggregation, one of a plurality of CC used by the UE is a special CC. The one special CC is referred to as the PCC (Primary Component Carrier). Further, the remaining of the plurality of CC is called SCC (Secondary Component Carrier). PCC may vary by the UE.
[0035]
　PCC is the most important CC among a plurality of CC, it is desirable that the communication quality is most stable in CC. Note that either which CC and PCC, in fact, depends on how to implement.
[0036]
　SCC is added to PCC. Furthermore, additional existing SCC is capable of being deleted. It should be noted that the change of the SCC is carried out by the addition of deleted and new SCC of existing SCC.
[0037]
　Determination techniques and changing techniques -PCC
　connection of the UE is first established, UE state, in case of transition from the RRC (Radio Resource Control) Idle in RRC Connected is, the UE uses when establishing a connection CC There, the PCC for the the UE. More specifically, the connection is established through the procedure of connection establishment (Connection Establishment). At that time, UE of the state, the transition from the RRC Idle in RRC Connected. Also, CC used in the above procedure, the PCC for the above UE. It is to be noted that the procedure is a procedure that is initiated from the UE side.
[0038]
　In addition, change of PCC is carried out by the inter-frequency handover. More specifically, when a handover is indicated in procedure connection reconfiguration (Connection Reconfiguration), the handover of PCC is performed, PCC is changed. It is to be noted that the procedure is a procedure that is initiated from the network side.
[0039]
　Additional -SCC
　As described above, SCC is added to the PCC. As a result, SCC is associated with the PCC. In other words, SCC is, subordinate to the PCC. Additional SCC is capable of being performed through procedures connection reconfiguration. In addition, the procedure is a procedure that is initiated from the network side.
[0040]
　Removing -SCC
　As described above, SCC can be deleted. Deletion of SCC is capable of being performed through procedures connection reconfiguration. More specifically, the particular SCC, which is specified in the message is deleted. It is to be noted that the procedure is a procedure that is initiated from the network side.
[0041]
　Moreover, deletion of all SCC is capable of being performed through procedures of the connection re-establishment (Connection Re-establishment).
[0042]
　Special role of -PCC
　connection establishment procedure, NAS (Non-Access Stratum) transmitted and received signaling, and physical uplink control channel: transmission and reception of uplink control signal at the (PUCCH Physical Uplink Control Channel) is not performed in the SCC It is carried out only with PCC.
[0043]
　The radio link failure: Detection and procedures subsequent connection re-establishment of (RLF Radio Link Failure) is also not performed in the SCC, it is performed only with PCC.
[0044]
　- Conditions backhaul for carrier aggregation
　ACK for example, SCC downlink signals (Acknowledgement) is transmitted in a PUCCH PCC. The ACK because by eNB (evolved Node B) is used for retransmission of data, the delay of the ACK is not allowed. Therefore, when the first eNB to use CC is a PCC for the UE, and the second eNB to use CC is a SCC for the UE is different, the first eNB and the second eNB it is desired delay in the backhaul is at most about 10ms between.
[0045]
　<< 2. >> Schematic configuration of a cellular system
　and subsequently, with reference to FIGS. 3 to 5, illustrating a schematic configuration of a cellular system 1 according to an embodiment of the present disclosure. 3 is an explanatory diagram showing an example of a schematic configuration of a cellular system 1 according to an embodiment of the present disclosure. Referring to Figure 3, the system 1 includes a base station 100 and the terminal device 200. Cellular system 1, for example, LTE, an LTE-Advanced or system that conforms to the communication standard equivalent thereto.
[0046]
　(Base station 100)
　the base station 100 performs radio communication cellular system 1 (cellular communication). That is, the base station 100 performs radio communication with the terminal device 200. For example, the base station 100 performs radio communication with the terminal device 200 located in the cell 10 which is a communication area of the base station 100. More specifically, for example, the base station 100 transmits downlink signals to the terminal device 200 receives the uplink signal from terminal device 200.
[0047]
　As an example, the base station 100 is a small base station, the cell 10 is small cell. As another example, the base station 100 may be a macro base station, the cell 10 may be a macrocell.
[0048]
　(Terminal device 200)
　terminal device 200 performs radio communication cellular system (cellular communication).
[0049]
　For example, the terminal apparatus 200 performs wireless communication with the base station 100. For example, the terminal device 200, when located in the cell 10 of the base station 100 performs wireless communication with the base station 100. More specifically, for example, terminal device 200 receives the downlink signal from the base station 100 transmits an uplink signal to the base station 100.
[0050]
　The terminal device 200 may perform wireless communication with another terminal device (for example, other terminal devices 200). For example, the terminal device 200, between devices (Device-to-Device: D2D) can communicate. The terminal device 200 may perform wireless communication within a LN (Localized Network) formed by the terminal device.
[0051]
　The terminal device 200 may perform other wireless communication. For example, the terminal device 200 may perform wireless communication based on a wireless LAN standard (wireless LAN communication).
[0052]
　(Frequency bands are used)
　radio communication cellular system 1 (i.e., cellular communication), the frequency band of the cellular system 1 is used. The frequency band, for example, a bandwidth allocated to the operators of cellular systems 1 may be referred to as licensed bands.
[0053]
　Especially in embodiments of the present disclosure, the cellular communication, the frequency band used for other wireless communication may also be used. That is, the cellular communication, cellular communication and a frequency band is shared between the other radio communication (hereinafter, referred to as "shared bandwidth") are also used. It said another wireless communication is, for example, a wireless communication conforming to a wireless LAN standard (i.e., wireless LAN communication). Further, the shared bandwidth is, for example, a channel of a wireless LAN. As an example, it said shared bandwidth is the channel of 20MHz.
[0054]
　(Other wireless communication)
　in the cell 10, the communication area of the another wireless communication may be present. That may overlap with a communication area of the cell 10 and the other radio communication.
[0055]
　For example, the other wireless communication is a wireless LAN communication, the cell 10, the communication area of ​​the wireless LAN may exist. In other words, it can overlap and the communication area of ​​the cell 10 and the wireless LAN. Hereinafter, a specific example with reference to FIGS. 4 and 5 in this regard.
[0056]
　Figure 4 is an explanatory diagram for explaining an example of a communication area of ​​a wireless LAN overlapping with small cell. Referring to FIG. 4, the base station 100 and the terminal device 200 is a small base station is shown. In addition, its surroundings, wireless LAN access point 30 and the terminal device 50 for wireless LAN communication, is present. Then, the communication area 40 of the access point 30, overlaps the cell 10 is a small cell.
[0057]
　5 is an explanatory diagram for explaining an example of a communication area of ​​a wireless LAN overlapping with macrocells. Referring to FIG 5, the base station 100 and the terminal device 200 is a macro base station is shown. In addition, its surroundings, wireless LAN access point 30 and the terminal device 50 for wireless LAN communication, is present. Then, the communication area 40 of the access point 30, overlaps the cell 10 is macrocells.
[0058]
　The wireless LAN communication, a wireless LAN (performs wireless LAN communication) access point and in addition to the wireless communication between the terminal device, between the terminal apparatus for performing wireless LAN communication, and wireless communication based on wireless LAN standards It may include. As an example, a wireless LAN communication may also include wireless communication in accordance with the Wi-Fi Direct.
[0059]
　The foregoing has described a cellular system 1 according to an embodiment of the present disclosure. Incidentally, cellular system 1, not only one base station 100 may include a plurality of base stations 100. Also, cellular system 1, in addition to the base station 100 and the terminal device 200, may include other devices. For example, cellular system 1, the core network node (e.g., MME (Mobility Management Entity), S-GW (Serving Gateway), and P-GW (Packet data network Gateway) etc.) may include.
[0060]
　<< 3. >> First Embodiment
　Subsequently, referring to FIGS. 6 to 15, illustrating a first embodiment of the present disclosure.
[0061]
　<3.1. Summary>
　First, an outline of the first embodiment.
[0062]
　- Problems according to a first embodiment
　the radio communication cellular system (i.e., cellular communication) with other wireless communication (e.g., wireless LAN communication) when a frequency band is shared between the frequency bands in a cellular communication but too much is used, the frequency band above other available opportunities in wireless communication is reduced significantly. This is a disadvantage for the another wireless communication performing unit. Therefore, when the frequency band is shared is that said frequency band is the opportunity available to the other wireless communication is ensured is preferable. For example, the opportunity of use of the frequency band, it is desirable that the given fair to apparatus and which performs cellular systems and other wireless communications. For example, since the wireless LAN communication radio resources based on the CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) has been fairly used between devices, when the another wireless communication is a wireless LAN communication, it is important that fairness is ensured.
[0063]
　Also, in the cellular system, wireless communication is performed relatively long 10ms radio frame as a unit. Also, in the cellular system, the terminal device is in a frequency band, acquires synchronization by the synchronizing signal transmitted in a radio frame, to obtain system information, by performing a series of connection establishment procedure, the frequency band it is possible to transmit and receive data using. In view of these points, it is desirable to continue to use some time a frequency band is shared between the cellular communication with other wireless communication for cellular communication.
[0064]
　Therefore, the mechanism that makes it possible to more appropriately used in a cellular system frequency band is shared between the cellular communication with other wireless communication is provided is preferable. More specifically, the frequency band is shared between the cellular communication with other wireless communication is ensured available opportunity to the other radio communication, and, to some extent the frequency band for cellular communication it is desirable that a mechanism that allows to continue to use time is provided.
[0065]
　- Features of the first embodiment
　according to the first embodiment, a frequency band is shared between the cellular communication with other wireless communication for a first period of time, is occupied for the above cellular communication, At least, for a second period corresponding to a period of the 1, is released from said cellular communication.
[0066]
　Thus, for example, a frequency band is shared between the cellular communication with other wireless communication is ensured available opportunity to the other radio communication, and, some time for the cellular communication the frequency band it is made possible to continue to use.
[0067]
　<3.2. Configuration of Base Station>
　With reference to FIGS. 6 to 10, an example of a configuration of a base station 100-1 according to the first embodiment. FIG 6 is a block diagram showing an example of a configuration of a base station 100-1 according to the first embodiment. Referring to FIG 6, the base station 100-1 includes an antenna unit 110, the wireless communication unit 120, a network communication unit 130, storage unit 140 and the processing unit 150.
[0068]
　(Antenna unit 110)
　antenna unit 110 radiates into the space the signal output by the radio communication unit 120 as a radio wave. Further, the antenna unit 110 converts the radio waves of space signal, and outputs the signal to the radio communication unit 120.
[0069]
　(Wireless communication unit 120)
　radio communication unit 120, to transmit and receive signals. For example, wireless communication unit 120 transmits a downlink signal to the terminal device 200-1 is located in cell 10, receives uplink signals from the terminal device 200-1 is located in cell 10.
[0070]
　For example, wireless communication unit 120 transmits and receives signals using the frequency band for the cellular system 1. Furthermore, especially in embodiments of the present disclosure, the wireless communication unit 120, cellular communication and other wireless communication (e.g., wireless LAN communication) frequency band is shared between (ie, shared bandwidth) using signals to send and receive.
[0071]
　(Network communication unit 130)
　network communication unit 130 communicates with other nodes. For example, the network communication unit 130 communicates with the core network node (e.g., the MME, such as S-GW and P-GW). Further, for example, a network communication unit 130 communicates with other base station 100-1.
[0072]
　(Storage unit 140)
　storage unit 140 temporarily or permanently storing a program and data for the operation of the base station 100-1.
[0073]
　(Processing unit 150)
　processing unit 150, to provide a variety of functions of the base station 100-1. Processing unit 150 includes a communication control unit 151. The processing unit 150 may further include other components other than the communication control unit 151.
[0074]
　(Communication control unit 151)
　The communication control unit 151, a shared bandwidth (i.e., frequency band is shared between the cellular communication with other wireless communication), for a first period of time, occupied for the above cellular communication , the above-mentioned shared bandwidth, at least, for a second period of time corresponding to the first period, to release from the cellular communication.
[0075]
　(A) other radio communication
　example, the another wireless communication, wireless communication based on wireless LAN standards (i.e., wireless LAN communication) is. In this case, the shared bandwidth is shared between a cellular communications and wireless LAN communication. Said shared bandwidth is, for example, a channel of a wireless LAN. As an example, it said shared bandwidth is the channel of 20MHz.
[0076]
　(B) occupying the shared bandwidth
　　- occupied by the transmission of a first signal over a period
　for example, the communication control unit 151, said shared wireless communication apparatus that performs radio communication cellular system 1 (cellular communication) is over the first period to transmit the signal using a band, by controlling the wireless communication device, the shared bandwidth occupied for said cellular communication over a period of above 1.
[0077]
　For example, the wireless communication device is a base station 100-1, the communication control unit 151, as the base station 100-1 transmits a signal using the shared bandwidth over the first period, the base station to control the 100-1. More specifically, for example, the communication control unit 151 assigns to any of the signal radio resource of the shared bandwidth over the first period. Further, for example, a communication controller 151, the radio resource of the shared bandwidth over the first period, to map the signals.
[0078]
　Further, the wireless communication device may be a terminal device 200-1, the communication control section 151, as terminal 200-1 transmits a signal using the shared bandwidth over the first period it may control the terminal device 200-1. More specifically, for example, the communication controller 151 to transmit a signal using the shared bandwidth over the first period, may instruct the terminal apparatus 200-1. For example, the instruction, RRC (Radio Resource Control) signaling or system information: may be performed by (System Information SI).
[0079]
　For example, as described above, the wireless communication device (i.e., at least one of the base station 100-1 and terminal 200-1) is controlled. As specific method of transmission of signals by the wireless communication device, for example, techniques described in the third embodiment is applied. Further, as a method of transmission of signals, techniques described in the second embodiment may also be applied.
[0080]
　As described above, by transmitting a signal using the shared bandwidth over the first period, for example, apparatus for performing the other wireless communication (e.g., wireless LAN communication) uses the shared bandwidth detecting a signal transmitted on to, refrain from using the shared bandwidth. Therefore, the above-mentioned shared bandwidth for cellular communication can be occupied.
[0081]
　　Occupied by the transmission of a frame for setting the -NAV
　the another wireless communication is a wireless LAN communication, the communication control unit 151, a wireless communication device that performs cellular communication, using the shared bandwidth, the NAV to transmit a frame including the duration information for setting, by controlling the wireless communication device, the shared bandwidth may occupy for the above cellular communication over the first period.
[0082]
　The wireless communication device may be at least one of a base station 100-1 and terminal 200-1.
[0083]
　Further, the frame may be a RTS frame or the CTS frame, or may be a frame like. It said duration information may be a value contained in the duration field. Further, the wireless communication device may transmit a frame comprising a duration data for setting the NAV that covers the entire said first period. Alternatively, the wireless communication device may transmit the two or more frames at different timings. Then, each time each of the two or more frames are transmitted, NAV of the device that receives the frame is updated, NAV is updated may cover the entire the first period.
[0084]
　The transmission of the frame, for example, the another wireless communication (e.g., wireless LAN communication) apparatus for performing, set the NAV, refrain from using said shared bandwidth. Therefore, the above-mentioned shared bandwidth for cellular communication can be occupied.
[0085]
　(C) a shared bandwidth release
　for example, the communication control unit 151, so that the radio communication apparatus that performs radio communication cellular system 1 (cellular communication) does not send a signal using the shared bandwidth across at least the second period to, by controlling the above-mentioned wireless communication device, to release from the cellular communication over a period of at least the second period of the above-mentioned shared bandwidth.
[0086]
　For example, the wireless communication device is a base station 100-1, the communication control unit 151, as the base station 100-1 does not transmit a signal using the shared bandwidth across at least the second period, the base to control the station 100-1. Further transmission, for example, the wireless communication device may be a terminal device 200-1, the communication control unit 151, the signal using the shared bandwidth across terminals 200-1 least the second period and so as not to, to control the terminal device 200-1. More specifically, for example, the communication control unit 151 stops the use of the shared bandwidth across at least the second period.
[0087]
　As described above, by no signal is transmitted using the shared bandwidth for at least the second period, for example, the another wireless communication (e.g., wireless LAN communication) apparatus for performing the the effects of cellular communication without receiving, it is possible to perform the another wireless communication using said shared bandwidth. That is, the shared bandwidth can be released from the cellular communication.
[0088]
　(D) a first period and the second period
　　- the length of the first period and the second period
　the first period is a period of more than one radio frame of a cellular system 1. In other words, the shared bandwidth is occupied for the cellular communication over a period of more than one radio frame. As a result, for example, it may allow cellular communication using the above shared bandwidth. Incidentally, the first period may be longer than the one radio frame (e.g., about 30 seconds).
[0089]
　Further, for example, the second period has a length similar to the first period. That is, the shared band, for a first period of time, is occupied for cellular communication, at least, over a period having a length similar to that of the first period, it is released from the cellular communication. As an example, the second period has a 90% to 110% of the length of the length of the first period. Thus, for example, cellular communication and other wireless communication (e.g., wireless LAN communication) fairness between is ensured.
[0090]
　Further, the second period may have a length of a predetermined ratio of the length of the first period. As an example, the second period may comprise 150% of the length of the length of the first period. As another example, the second period may have 60% of the length of the length of the first period.
[0091]
　The length of the first period and the second period may be fixed. Alternatively, the length of the first period and the second period may be variable, it may be the length of the second period according to the length of the first period is changed or the length of the first period according to the length of the second period may vary.
[0092]
　　- If a period of the first period are consecutive
　for example, the first period is a period during which consecutive. In other words, the shared bandwidth is occupied for cellular communication over a first period of time to be continuous.
[0093]
　Thus, for example, it becomes possible to efficiently use the for cellular communication with said shared bandwidth. More specifically, for example, to initiate use of the shared bandwidth is, the terminal device, synchronization acquisition, acquisition of system information, and the operation of such a series connection establishment procedure is required. Therefore, if said shared bandwidth is used over successive time, the frequency of the operation is less, it said shared bandwidth may be more efficiently used by the terminal device 200-1.
[0094]
　Further, for example, the second period is the immediately preceding or period immediately following the first period. Thus, for example, before and after use of the shared bandwidth in a cellular system 1, it said shared bandwidth becomes possible to reliably ensure the available opportunity to another radio communication.
[0095]
　　- First Example
　As a first example, the second period is a continuous period immediately after the said first period. This point will be described a specific example with reference to FIG.
[0096]
　Figure 7 is an explanatory diagram for explaining a first example of a period of occupation and release of shared bandwidth. For example, the first period 61 is a period consecutive second period 63 is a continuous period immediately following the first time period 61. That is, the shared band, a first period of time 61 successive, occupied for cellular communication, then, at least, for a second consecutive periods, is released from the cellular communication.
[0097]
　Thus, for example, cellular system 1, if necessary, it is possible to start using said shared bandwidth more quickly. Further, the shared bandwidth can become more available opportunity to the other radio communication.
[0098]
　　- A second example
　As a second example, the second period may be a period immediately after the period and the first period of the immediately preceding the first period. This point will be described a specific example with reference to FIG.
[0099]
　FIG 8 is an explanatory diagram for explaining a second example of a period of occupation and release of shared bandwidth. For example, the first period 61 is a period consecutive second period 63 is a period immediately after the immediately preceding period and the first period 61 of the first period 61. That is, the shared band, after it has been released from the cellular communication over a portion of the period of the second time period 63, is occupied for cellular communications for a first time period 61 consecutive, then the remaining second period 63 It is released from the cellular communication over a period of time.
[0100]
　Thus, for example, cellular system 1, if necessary, it is possible to quickly start using of the shared bandwidth. Further, the time which the frequency band is used for cellular communications can be more.
[0101]
　　- Third example
　As a third example, the second period may be a continuous period immediately before the first period. This point will be described a specific example with reference to FIG.
[0102]
　Figure 9 is an explanatory diagram for explaining a third example of a period of occupation and release of shared bandwidth. For example, the first period 61 is a period consecutive second period 63 is a continuous period immediately preceding the first period 61. That is, shared bandwidth is at least, for a second consecutive periods, is released from the cellular communication, then, for a first time period 61 consecutive, occupied for cellular communication.
[0103]
　Thus, for example, on condition that said shared bandwidth above other available opportunity for wireless communication is ensured, it said shared bandwidth is available for cellular communications. Therefore, it becomes possible to said shared bandwidth can be more reliably ensured available opportunity to another radio communication.
[0104]
　　- If the first period is discontinuous period
　the first period may be a discontinuous period. Then, the communication control unit 151, in the third period, the shared bandwidth occupied for cellular communication over the first period, to release over from the cellular communication at least the second period the shared bandwidth it may be. This point will be described a specific example with reference to FIG.
[0105]
　Figure 10 is an explanatory diagram for explaining a fourth example of the period of occupation and release of shared bandwidth. For example, the first period 61 is a discontinuous period, the second period 63, a discontinuous period. In the third period 65, over the discontinuous first period 61, is occupied for shared bandwidth of cellular communication, for a second period of time 63, shared bandwidth is released from the cellular communication. As an example, the third time period 65 is a period having a fixed length, in the third period 65, the upper limit time available shared bandwidth on a cellular communication is determined. And, occupancy period of shared bandwidth (ie, the first period 61) and reaches the upper limit time, until the third period 65 has elapsed, shared bandwidth is released from the cellular communication.
[0106]
　Thus, it said shared bandwidth becomes possible to reliably ensure the available opportunity to the other radio communication.
[0107]
　As described above, the communication control unit 151, the above-mentioned shared bandwidth occupied for cellular communication over the first period, to release from the cellular communication over a period of at least the second period of the above-mentioned shared bandwidth. Thus, for example, cellular communication and the other frequency band is shared between the wireless communication (i.e., shared bandwidth) is secure opportunities available to the other radio communication and cellular communication the frequency band it is, it is possible to continue to use a certain amount of time for.
[0108]
　<3.3. Configuration of the terminal device>
　Next, with reference to FIG. 11, an example of a configuration of a terminal apparatus 200-1 according to the first embodiment. 11 is a block diagram showing an example of a configuration of a terminal apparatus 200-1 according to the first embodiment. Referring to FIG. 11, the terminal device 200-1 includes an antenna unit 210, the wireless communication unit 220, a storage unit 230 and the processing unit 240.
[0109]
　(Antenna unit 210)
　antenna unit 210 radiates into the space the signal output by the radio communication unit 220 as a radio wave. In addition, the antenna unit 210, converts the radio waves of space to the signal, and outputs the signal to the wireless communication unit 220.
[0110]
　(Wireless communication unit 220)
　radio communication unit 220, to transmit and receive signals. For example, wireless communication unit 220, the terminal device 200-1 when located in the cell 10 receives the downlink signal from base station 100-1, and transmits the uplink signal to the base station 100-1 .
[0111]
　For example, wireless communication unit 220 transmits and receives signals using the frequency band for the cellular system 1. Furthermore, especially in embodiments of the present disclosure, the wireless communication unit 220, cellular communication and other wireless communication (e.g., wireless LAN communication) frequency band is shared (i.e., shared bandwidth) between using signals to send and receive.
[0112]
　(Storage unit 230)
　storage unit 230 temporarily or permanently storing a program and data for the operation of the terminal device 200-1.
[0113]
　(Processing unit 240)
　processing unit 240, to provide a variety of functions of the terminal device 200-1. Processing unit 240 includes a communication control unit 241. The processing unit 240 may further include other components other than the communication control unit 241.
[0114]
　(Communication control unit 241)
　communication control unit 241 controls the terminal device 200-1.
[0115]
　Especially in the first embodiment, the communication control unit 241, as the terminal device 200-1 transmits a signal using the shared bandwidth over the first period, may control the terminal 200. For example, the communication controller 241, in response to the instruction from the base station 100-1, so that the terminal device 200-1 transmits a signal using the shared bandwidth over the first period, controls the terminal device 200 it may be.
[0116]
　As specific method of transmission of signals, techniques described in the third embodiment may be applied. Further, as a method of transmission of the signal, a technique may be also applied for explaining the second embodiment.
[0117]
　<3.4. Processing Flow>
　Next, with reference to FIGS. 12 to 15, an example of the processing according to the first embodiment.
[0118]
　(First Example)
　FIG. 12 is a flowchart showing a first example of a schematic flow of processing according to the first embodiment. The process is an example of a case where occupation and release of the shared bandwidth, as shown in FIG 7 is performed.
[0119]
　The communication control unit 151 determines whether to use the shared band (i.e., frequency band is shared between the cellular communication with other wireless communication) (S301). If it is determined not to use the shared band (S301: NO), the process returns to step S301.
[0120]
　On the other hand, if it is determined to use the shared bandwidth (S301: YES), the communication control section 151, occupy the shared bandwidth for a first period for cellular communication (S303). In the first period, cellular communication is performed.
[0121]
　Then, the communication control unit 151, to release the above-mentioned shared bandwidth from cellular communication for a second period of time (S305). Then, the process returns to step S301.
[0122]
　(Second Example)
　FIG. 13 is a flowchart showing a second example of a schematic flow of processing according to the first embodiment. The process is an example of a case where occupation and release of the shared bandwidth, as shown in FIG. 8 is performed.
[0123]
　The communication control unit 151 determines whether to use the shared band (i.e., frequency band is shared between the cellular communication with other wireless communication) (S311).
[0124]
　If it is determined not to use the shared bandwidth (S311: NO), the communication control section 151 calculates an additional release time for said shared bandwidth (S313). Then, the process returns to step S311. Incidentally, the additional release period, after the release of the second period is a period in which further releases the shared bandwidth.
[0125]
　On the other hand, if it is determined to use the shared bandwidth (S311: YES), the communication control section 151, occupy the shared bandwidth for a first period for cellular communication (S315). In the first period, cellular communication is performed.
[0126]
　Then, the communication control unit 151, the rest of the period of the second period (ie, the difference period of the second period and the additional release period) to release the above-mentioned shared bandwidth from the cellular communication over (S317). Then, the process returns to step S311.
[0127]
　(Third embodiment)
　FIG. 14 is a flowchart illustrating a third example of a schematic flow of processing according to the first embodiment. The process is an example of a case where occupation and release of the shared bandwidth, as shown in FIG. 9 is performed.
[0128]
　The communication control unit 151 determines whether to use the shared band (i.e., frequency band is shared between the cellular communication with other wireless communication) (S321).
[0129]
　If it is determined to use the shared bandwidth (S321: YES), the communication control unit 151, said shared bandwidth is determined either already freed for a second period of time (S323).
[0130]
　If it said shared bandwidth is determined to be already freed for a second period (S323: YES), the communication control section 151, occupy the shared bandwidth for a first period for cellular communications ( S325). In the first period, cellular communication is performed. After that, the process returns to step S321.
[0131]
　On the other hand, if it is determined not to use the shared bandwidth (S321: NO), and, if the shared bandwidth is determined not yet released back for a second period (S323: NO), the communication control unit 151 calculates the release time for the above-mentioned shared bandwidth (S327). Then, the process returns to step S321.
[0132]
　(Fourth embodiment)
　FIG. 15 is a flowchart showing a fourth example of a schematic flow of processing according to the first embodiment. The process is an example of a case where occupation and release of the shared bandwidth, as shown in FIG. 10 is performed. The above process is carried out over a third period.
[0133]
　The communication control unit 151 determines whether to use the shared band (i.e., frequency band is shared between the cellular communication with other wireless communication) (S331).
[0134]
　If it is determined to use the shared bandwidth (S331: YES), the communication control section 151, occupy the shared bandwidth for cellular communications (S333). In the first period, cellular communication is performed. Thereafter, the communication controller 151 determines whether the occupancy of the shared bandwidth (the first period) has reached the upper limit (S 335).
[0135]
　If it is determined not to use the shared band (S 331: YES), and, if the occupancy period (first period) is determined not to reach the upper limit (S 335: YES), the communication control unit 151 , to release the above-mentioned shared bandwidth from the cellular communication (S337). Then, the process returns to step S331.
[0136]
　On the other hand, if the occupancy period (first period) is determined to have reached the upper limit (S 335: YES), the communication control unit 151, the shared bandwidth over the remaining period of the third period release from the cellular communication (S339). Then, the process is terminated.
[0137]
　<3.5. Modifications>
　(schematic)
　in the example of the first embodiment described above, for example, base station 100-1 (communication control unit 151) is, for a first period of time, occupies shared bandwidth for cellular communications, at least , for a second period of time corresponding to the first period, to release the above-mentioned shared bandwidth from the cellular communication.
[0138]
　On the other hand, in the modification of the first embodiment, the terminal device 200-1 (communication control unit 241) is, for a first period of time, occupies shared bandwidth for cellular communications, at least, in the first period over the corresponding second period, to release the above-mentioned shared bandwidth from the cellular communication.
[0139]
　Thus, for example, cellular communication and the other frequency band is shared between the wireless communication (i.e., shared bandwidth) is secured available opportunity to the other radio communication, and the terminal device in a cellular system 1 wireless communication (e.g., wireless communication D2D communication or the LN) that the frequency band for continuing to use a certain amount of time, becomes possible.
[0140]
　Also in the modification of the first embodiment, the base station 100-1 (communication control unit 151) over a first time period occupies a shared bandwidth for cellular communications, at least, the first period for a second period of time corresponding to, it may be to release the above-mentioned shared bandwidth from the cellular communication.
[0141]
　(Terminal device 200-1: communication control unit 241)
　in the modification of the first embodiment, the communication control unit 271, shared bandwidth (i.e., frequency band is shared between the cellular communication with other wireless communication) a, for a first period of time, it occupied for the cellular communication, the above-mentioned shared bandwidth, at least, for a second period of time corresponding to the first period, to release from the cellular communication.
[0142]
　Description of the communication control unit 241 in this regard, except for the differences relating to principal (base station 100-1 and terminal 200-1), and a corresponding description of the communication control unit 151 according to the first embodiment described above it is the same. Thus, the description thereof is omitted to duplicate here.
[0143]
　(Processing Flow)
　Examples of the processing of the terminal apparatus 200-1 according to a modification of the first embodiment, except for the differences relating to principal (base station 100-1 and terminal 200-1), FIGS. 12 to 15 is the same as the example of the processing of the base station 100-1 described with reference to. Thus, the description thereof is omitted to duplicate here.
[0144]
　<< 4. >> The second embodiment
　is followed with reference to FIGS. 16 to 21, illustrating a second embodiment of the present disclosure.
[0145]
　<4.1. Summary>
　First, an outline of the second embodiment.
[0146]
　- Problems of the second embodiment
　in the wireless LAN standard, CSMA / CA is employed. For example, to use a frequency band used for wireless LAN communication in cellular communication, apparatus (base station 100 or the terminal device 200) of the cellular system 1 is also conceivable to operate based on CSMA / CA. However, in this case, of course, apparatus for performing wireless LAN communication is used before the frequency band, the apparatus of the cellular system 1 is also no longer possible to use the above frequency band. That is, the device of the cellular system 1 is not always possible to secure the frequency band for cellular communication. Therefore, time to start using the frequency band for wireless communication of the cellular system can take.
[0147]
　Therefore, the mechanism that makes it possible to more appropriately used in a cellular system frequency band is shared between the cellular communication with other wireless communication is provided is preferable. More specifically, the mechanism that makes it possible to reliably secured by for cellular communication the frequency band is provided is preferable.
[0148]
　- Features of the second embodiment
　according to the second embodiment, for example, cellular communication and a frequency band is shared between the wireless LAN communication (i.e., shared bandwidth) the period no signal is transmitted using before DIFS, the radio communication apparatus that performs cellular communication so begin transmitting signals using the frequency band, the wireless communication device is controlled. Thus, for example, it is possible to reliably secured by for cellular communication the frequency band.
[0149]
　Further, according to the second embodiment, for example, over a period of up radio frame starts on the other frequency bands used for cellular communications, wireless communication device that performs cellular communication, cellular communication and wireless LAN communication frequency band is shared between (ie, shared bandwidth) to send a dummy signal using said wireless communication device is controlled. Thus, for example, it is possible to reliably secured by for cellular communication the frequency band.
[0150]
　<4.2. Configuration of Base Station>
　With reference to FIGS. 16 to 18, an example of a configuration of a base station 100-2 according to the second embodiment. Figure 16 is a block diagram showing an example of a configuration of a base station 100-2 according to the second embodiment. Referring to FIG 16, the base station 100-2 includes an antenna unit 110, the wireless communication unit 120, a network communication unit 130, storage unit 140 and the processing unit 160.
[0151]
　Here, the antenna unit 110, the wireless communication unit 120, a description of the network communication unit 130 and the storage unit 140, except for the difference of the code, there is no difference between the first embodiment and the second embodiment. Thus, the description thereof is omitted to describe only the processing unit 160, to duplicate here.
[0152]
　(Processing unit 160)
　processing unit 160, to provide a variety of functions of the base station 100-2. Processing unit 160 includes a communication control unit 161. The processing unit 160 may further include other components other than the communication control unit 161.
[0153]
　(Communication control unit 161)
　a first control of (a) to secure the shared bandwidth
　for example, a communication controller 161, before the period in which the signal using the shared bandwidth is not transmitted is DIFS, the cellular communication wireless communication device which performs the so begin transmitting signals using the shared bandwidth, and controls the wireless communication device. It said shared band, wireless communication cellular system 1 (i.e., cellular communication) and the radio communication conforming to a wireless LAN standard (i.e., wireless LAN communication) is a frequency band is shared between.
[0154]
　Further, for example, the communication control unit 161, after the above-mentioned period no signal is transmitted using the shared bandwidth is longer than SIFS, as the wireless communication device starts to transmit a signal using the shared bandwidth to, to control the wireless communication device.
[0155]
　For example, the wireless communication device is a base station 100-2, the communication control unit 161, before the period no signal is transmitted using the shared bandwidth to be DIFS even after having longer than SIFS , base station 100-2 so begin transmitting signals using the shared bandwidth, control the base station 100-2. Or more specifically, for example, processing unit 160 (the communication control unit 161 or other components), based on the received result of the signal by the wireless communication unit 120, the signal using the shared bandwidth is being transmitted the judges. Further, the processing unit 160 (the communication control unit 161 or other components) measures the period of signal using the shared bandwidth is not being transmitted. Then, the communication control unit 161, before the DIFS period signal using the shared bandwidth is not transmitted even after having longer than SIFS, the wireless communication unit 120, using the shared bandwidth and to transmit a signal. As an example, said period, at a short predetermined period than DIFS longer than SIFS, signal is transmitted using the shared bandwidth. Below, a specific example with reference to FIG. 17 in this regard.
[0156]
　Figure 17 is an explanatory diagram for explaining the timing of transmission of the signal. Referring to FIG 17, the signal begins to be transmitted before the period in which the signal is not being transmitted using the shared bandwidth to be DIFS even after having longer than SIFS. As an example, the signal begins to be sent after a short predetermined period of time than the longer DIFS than SIFS.
[0157]
　Apparatus for performing wireless LAN communication, the period during which the signal is not transmitted reaches the sum of the DIFS and back-off time may send a signal. Therefore, by starting to send the signal before DIFS elapses as described above, for example, prior to the apparatus for performing wireless LAN communication, it becomes possible to transmit the signal. As a result, the transmission of signal using the shared bandwidth by the apparatus for performing wireless LAN communication can be suppressed. Thus, it said shared bandwidth can be reliably ensured by for cellular communication.
[0158]
　Also, by starting to transmit a signal after SIFS elapses as described above, the signal to be transmitted can be prevented from colliding with the signal of the wireless LAN communication. More specifically, for example, RTS frame, CTS frame, DATA frame and ACK frame is connected at time intervals of SIFS. Therefore, when a signal is sent before SIFS elapses, the signal, CTS frames may collide with any of the signals of the DATA frame or an ACK frame. Therefore, as described above, if the period no signal is transmitted using the shared bandwidth Hajimere signal is transmitted after a longer than SIFS, signal of the signal and the CTS frame, DATA frame or ACK frame and collisions can be avoided.
[0159]
　(B) a second control for ensuring the shared bandwidth
　　- transmission of signals to the frame start for the other frequency bands
　eg, the communication control unit 161, a radio frame for other frequency bands used for cellular communications There over a period of up to initiate, as a radio communication apparatus for performing the cellular communication transmits a dummy signal using the shared bandwidth, and controls the wireless communication device. It said shared band, wireless communication cellular system 1 (i.e., cellular communication) and the radio communication conforming to a wireless LAN standard (i.e., wireless LAN communication) is a frequency band is shared between.
[0160]
　For example, the wireless communication device is a base station 100-2. Further, for example, it said shared bandwidth is a component carrier (CC) for the cellular system 1, said other frequency band is another CC for the cellular system 1. The communication control unit 161, over a period of up radio frame starts for other CC, as the base station 100-2 transmits a dummy signal using the shared bandwidth (CC), the base station 100-2 Control. More specifically transmission, for example, a communication controller 161, the elapsed before the timing of elapse after DIFS the SIFS, over a period of up radio frame starts for the other CC, a dummy signal to the radio communication unit 120 make. Below, a specific example with reference to FIG. 18 in this regard.
[0161]
　Figure 18 is an explanatory diagram for explaining an example of transmission of the dummy signal. Referring to FIG 18, after the signal using the shared bandwidth (CC) is no longer transmitted (e.g., as shown in FIG. 17, than the period in which the signal using the shared bandwidth is not being transmitted SIFS even after having longer before the DIFS in), the dummy signal using the shared bandwidth starts to be transmitted. And, until the other CC radio frame (and the radio frame of the shared bandwidth) is started, the dummy signal is transmitted. Then, using the above other CC and the shared bandwidth, in the radio frame, a signal of a cellular system are transmitted and received.
[0162]
　By transmitting a dummy signal over the period to the radio frame for said other frequency band is started using the shared bandwidth, until the start of the radio frame, using the shared bandwidth by the apparatus for performing wireless LAN communication the transmission of the signal can be suppressed. That is, until the start of the radio frame, said shared bandwidth is secured. Therefore, for example, it may be at a timing when the radio frame is started on the other frequency band for cellular communication, to initiate a radio frame for said shared bandwidth. Thus, while synchronized with the radio frame for the radio frame and the other frequency bands for a shared bandwidth, it is possible to reliably secured by for cellular communication with said shared bandwidth.
[0163]
　Note that the dummy signal is, for example, it is any signal other than a cellular system signal (control signal and data signal). The dummy signal, a busy tone for the wireless LAN communication performing unit.
[0164]
　In addition, the period of up to radio frame for the other frequency band is started, in other words, is a period of up to a sub-frame # 0 of the above-mentioned other frequency band is started.
[0165]
　　Transmission radio frame for setting the -NAV
　Instead of the transmission of dummy signal described above, the communication control unit 161, before the radio frame for said other frequency band is initiated, the wireless communication device, using the above shared bandwidth, to transmit a frame including the duration information for setting the NAV, may control the wireless communication device.
[0166]
　For example, the wireless communication device is a base station 100-2. Further, the shared bandwidth may be a CC for the cellular system 1, it said other frequency band may be other CC for the cellular system 1. Further, the frame may be a RTS frame or the CTS frame, or may be a frame like. The communication control unit 161, the base station 100-2 before the radio frames for other CC is initiated to transmit the frame using the shared bandwidth, it may control the base stations 100-2 . More specifically, for example, the communication control unit 161 generates the frame, to the wireless communication unit 120, using the shared bandwidth to transmit the frames before the radio frames for other CC starts it may be.
[0167]
　Note that the wireless communication device may transmit a frame comprising a duration data for setting the NAV that covers the period until the radio frame for said other frequency band is started. Alternatively, the wireless communication device may transmit the two or more frames at different timings. Then, each time each of the two or more frames are transmitted, the NAV is updated for apparatus for receiving frames, NAV to be updated, the whole period until the radio frame for said other frequency band is started it may cover.
[0168]
　By being sent the frame, for example, apparatus for performing wireless LAN communication, and sets the NAV, refrain from using said shared bandwidth. Therefore, until the start of the radio frame, the transmission of the signal using the shared bandwidth by the apparatus for performing wireless LAN communication can be suppressed.
[0169]
　<4.3. Configuration of the terminal device>
　Next, with reference to FIG. 19, an example of a configuration of a terminal apparatus 200-2 according to the second embodiment. Figure 19 is a block diagram showing an example of a configuration of a terminal apparatus 200-2 according to the second embodiment. Referring to FIG. 19, the terminal device 200-2 includes an antenna unit 210, the wireless communication unit 220, a storage unit 230 and the processing unit 250.
[0170]
　Here, the antenna portion 210, description of the wireless communication unit 220 and the storage unit 230, except for the difference of the code, there is no difference between the first embodiment and the second embodiment. Thus, the description thereof is omitted to describe only the processing unit 250, to duplicate here.
[0171]
　(Processor 250)
　the processing unit 250 provides various functions of the terminal apparatus 200-2. Processing unit 250 includes a communication control unit 251. The processing unit 250 may further include other components other than the communication control unit 251.
[0172]
　(Communication control unit 251)
　communication control unit 251 controls the terminal device 200-1.
[0173]
　<4.4. Processing Flow>
　Next, with reference to FIGS. 20 to 21, an example of processing according to the second embodiment.
[0174]
　(First Example)
　FIG. 20 is a flowchart showing a first example of a schematic flow of processing according to the second embodiment. The process is an example of a case where signals are transmitted as shown in FIG. 17.
[0175]
　Processing unit 160 (the communication control unit 161 or other components), based on the received result of the signal by the wireless communication unit 120, determines whether the signal using the shared bandwidth is transmitted (S 401). If the signal using the shared bandwidth is determined to be transmitted (S401: YES), the process returns to step S401.
[0176]
　On the other hand, if the signal is determined not to be transmitted using the shared bandwidth (S401: NO), for example, a communication controller 161, a period in which the signal using the shared bandwidth is not being transmitted determines becomes short predetermined period than DIFS longer than SIFS (S403). This period does not become the predetermined period (i.e., signals using the shared bandwidth prior to the expiration of the predetermined time period has been sent) if it is determined that the (S 403: NO), the process Back to step S401.
[0177]
　If the above period is determined to have become the predetermined time period (S403: YES), according to the control by the processing unit 160, the base station 100-2 transmits a signal using the shared bandwidth, and / or to receive (S405). Then, the process is terminated.
[0178]
　(Second Example)
　FIG. 21 is a flowchart showing a second example of a schematic flow of processing according to the second embodiment. The process is an example of a case where signals are transmitted as shown in FIG. 18 (and 17).
[0179]
　Processing unit 160 (the communication control unit 161 or other components), based on the received result of the signal by the wireless communication unit 120, determines whether the signal using the shared bandwidth is transmitted (S 411). If the signal using the shared bandwidth is determined to be transmitted (S411: YES), the process returns to the step S 411.
[0180]
　On the other hand, if the signal is determined not to be transmitted using the shared bandwidth (S411: NO), for example, a communication controller 161, a period in which the signal using the shared bandwidth is not being transmitted determines becomes short predetermined period than DIFS longer than SIFS (S413). This period does not become the predetermined period (i.e., signals using the shared bandwidth prior to the expiration of the predetermined time period has been sent) if it is determined that the (S 413: NO), the process Back to step S411.
[0181]
　If the above period is determined to have become the predetermined time period (S413: YES), according to the control by the processing unit 160, the base station 100-2, radio for other frequency bands for cellular system 1 over a period of up to frame begins, to send a dummy signal by using the above-mentioned shared bandwidth (S415).
[0182]
　Furthermore, the base station 100-2 may use the shared bandwidth to transmit a signal of a cellular system in the radio frame, and / or receiving (S417). Then, the process is terminated.
[0183]
　<4.5. First modification>
　(schematic)
　(a) a first control for ensuring the shared bandwidth
　in the example of the second embodiment described above, for example, base station 100-2 uses a shared bandwidth signal There before period not transmitted becomes DIFS, it starts to transmit signals using the shared bandwidth.
[0184]
　On the other hand, in the first modification of the second embodiment, for example, base station 100-2, terminal 200-2 is said shared bandwidth before the period no signal is transmitted using the shared bandwidth is DIFS use the to begin to send a signal, to control the terminal device 200-2. Then, the terminal device 200-2, before the period in which the signal using the shared bandwidth is not transmitted is DIFS, it starts to transmit signals using the shared bandwidth.
[0185]
　Thus, for example, to a device it does not reach the signal transmitted by the base station 100-2 may receive a signal transmitted by the terminal device 200-2. Therefore, for example, it can not solve the hidden terminal problem.
[0186]
　Also in the first modification of the second embodiment, the base station 100-2 (communication control unit 161) before the period no signal is transmitted using the shared bandwidth is DIFS, said shared bandwidth it may begin to transmit signals using.
[0187]
　(B) a second control for ensuring the shared bandwidth
　described above in the example of the second embodiment, for example, base station 100-2, for other frequency bands used for wireless communication cellular system 1 over a period of up radio frame starts, and transmits a dummy signal using the shared bandwidth.
[0188]
　On the other hand, in the first modification of the second embodiment, for example, base station 100-2, the terminal device over a period of up radio frame starts on the other frequency bands used in cellular communication 200-2 but to send a dummy signal using a shared bandwidth, to control the terminal device 200-2. Then, the terminal device 200-2, over a period of up radio frame starts on the other frequency band used for the wireless communication of the cellular system 1, and transmits a dummy signal using the shared bandwidth.
[0189]
　Thus, for example, to a device it does not reach the signal transmitted by the base station 100-2 may receive a signal transmitted by the terminal device 200-2. Therefore, for example, it can not solve the hidden terminal problem.
[0190]
　Also in the first modification of the second embodiment, the base station 100-2 (communication control unit 161), the radio frame for other frequency bands used for wireless communication of the cellular system 1 starts over a period of up to, it may transmit the dummy signal using the shared bandwidth.
[0191]
　: (Base station 100-2 communication control unit 161)
　a first control for ensuring (a) shared bandwidth
　as described above, for example, the communication control unit 161, signals using a shared bandwidth can not be transmitted period There before the DIFS, as a radio communication apparatus for performing the cellular communication begins to transmit a signal using the shared bandwidth, and controls the wireless communication device. Further, for example, the communication control unit 161, after the above-mentioned period no signal is transmitted using the shared bandwidth is longer than SIFS, as the wireless communication device starts to transmit a signal using the shared bandwidth to, to control the wireless communication device.
[0192]
　In the first modification, for example, the wireless communication device is a terminal device 200-2, the communication control unit 161, a period in which the signal using the shared bandwidth is not transmitted after a longer than SIFS before DIFS there, the terminal apparatus 200-2 so begin transmitting signals using the shared bandwidth, and controls the terminal device 200-2. More specifically, for example, the communication control unit 161, using the above shared bandwidth before the period no signal is transmitted using the shared bandwidth to be DIFS even after having longer than SIFS signal so start sending, to instruct the terminal device 200-2. For example, this indication may be given by RRC signaling or system information.
[0193]
　(B) a second control for ensuring the shared bandwidth
　　- transmission of signals to the frame start for the other frequency band
　as described above, for example, a communication controller 161, other frequency used for cellular communications over a period of up radio frame starts for the band, as a radio communication apparatus for performing the cellular communication transmits a dummy signal using the shared bandwidth, and controls the wireless communication device.
[0194]
　In the first modification, for example, the wireless communication device is a terminal device 200-2. Further, for example, it said shared bandwidth is CC for the cellular system 1, said other frequency band is another CC for the cellular system 1. The communication control unit 161, over a period of up radio frame starts for other CC, as terminal 200-2 transmits a dummy signal using the shared bandwidth (CC), the terminal device 200-2 Control. More specifically, for example, a communication controller 161, so as to transmit the dummy signal using a shared bandwidth (CC) over the period to the radio frame is started for the other CC, the terminal device 200-2 to tell. For example, this indication may be given by RRC signaling or system information.
[0195]
　　Transmission radio frame for setting the -NAV
　As described above, in place of the transmission of dummy signal described above, the communication control unit 161, before the radio frame for said other frequency band is initiated, the wireless communication apparatus, using the above shared bandwidth, to transmit a frame including the duration information for setting the NAV, may control the wireless communication device.
[0196]
　In a first variant, the wireless communication device may be a terminal device 200-2. Further, the shared bandwidth may be a CC for the cellular system 1, it said other frequency band may be other CC for the cellular system 1. Further, the frame may be a RTS frame or the CTS frame, or may be a frame like. The communication control unit 161, the terminal device 200-2 before radio frames for other CC is initiated to transmit the frame using the shared bandwidth, it may control the terminal device 200-2 . More specifically, for example, a communication controller 161, so as to transmit the frame before the radio frames for other CC begins, it may instruct the terminal apparatus 200-2. For example, this indication may be given by RRC signaling or system information.
[0197]
　The foregoing has described a base station 100-2 according to the first modification of the second embodiment. In the first modification of the second embodiment, the wireless communication device may be a base station 100-2 and the terminal 200-2, similarly to the example of the second embodiment described above , it may be base station 100-2 also sends a signal.
[0198]
　: (Terminal device 200-2 communication control unit
　251) a first control for ensuring (a) shared bandwidth
　in a first modification of the second embodiment, for example, the communication control unit 251, a shared bandwidth before period signal using is not transmitted is DIFS, the terminal apparatus 200-2 so begin transmitting signals using the shared bandwidth, and controls the terminal device 200-2.
[0199]
　Further, for example, the communication control unit 251, said time period no signal is transmitted using the shared band after longer than SIFS, the terminal device 200-2 starts transmitting a signal using the shared bandwidth as described above, to control the terminal device 200-2.
[0200]
　For example, the communication control unit 251, in response to the instruction from the base station 100-2, and controls the terminal device 200-2. More specifically, for example, processing unit 250 (the communication control unit 251 or other components), based on the received result of the signal by the wireless communication unit 220, whether the signal using the shared bandwidth is being transmitted judge. Further, the processing unit 250 (the communication control unit 251 or other components) measures the period of signal using the shared bandwidth is not being transmitted. Then, the communication control unit 251, before the DIFS period signal using the shared bandwidth is not transmitted even after having longer than SIFS, the wireless communication unit 220, using the shared bandwidth and to transmit a signal. As an example, said period, at a short predetermined period than DIFS longer than SIFS, signal is transmitted using the shared bandwidth. In a first modification of the second embodiment, for example, as shown in FIG. 17, the terminal device 200-2 transmits a signal.
[0201]
　(B) a second control for ensuring the shared bandwidth
　　- transmission of signals to the frame start for the other frequency band
　in a first modification of the second embodiment, for example, the communication control unit 251, a cellular over a period of up radio frame starts on the other frequency bands used for communication, so that the terminal device 200-2 transmits a dummy signal using the shared bandwidth, and controls the terminal device 200-2.
[0202]
　For example, the communication control unit 251, in response to the instruction from the base station 100-2, and controls the terminal device 200-2. More specifically, for example, the communication control unit 251, the elapsed before the timing of elapse after DIFS the SIFS, over a period of up radio frame starts for the other CC, to transmit a dummy signal to the radio communication unit 220 . In a first modification of the second embodiment, for example, as shown in FIG. 18, the terminal device 200-2 transmits a signal.
[0203]
　　Transmission radio frame for setting the -NAV
　In the first modification of the second embodiment, instead of transmitting the dummy signal described above, the communication control unit 251, a radio for said other frequency band before the frame is started, the terminal device 200-2, by using the shared bandwidth, to transmit a frame including the duration information for setting the NAV, and control the terminal device 200-2 good.
[0204]
　For example, the communication control unit 251, in response to the instruction from the base station 100-2, may control the terminal device 200-2. More specifically, for example, the communication control unit 251 generates the frame, it may be the frame is transmitted to the radio communication unit 220 before the radio frame is started for other CC.
[0205]
　(Processing Flow)
　Examples of the processing of the terminal apparatus 200-2 according to a first modification of the second embodiment, except for the differences relating to principal (base station 100-2 and terminal 200-2), FIG. 20 is the same as the example of the processing of Figure 21 the base station 100-2 has been described with reference to. Thus, the description thereof is omitted to duplicate here.
[0206]
　<4.6. Second modification>
　(schematically)
　as in the first modification of the second embodiment, in the second modification of the second embodiment, for example, the terminal device 200-2, using the shared bandwidth before the period no signal is transmitted becomes DIFS, it starts to transmit signals using the shared bandwidth. Further, for example, the terminal device 200-2, over a period of up radio frame starts on the other frequency bands used in cellular communication, and transmits a dummy signal using the shared bandwidth.
[0207]
　Especially, in the second modification of the second embodiment, the terminal device 200-2 is not in accordance with the control by the base station 100-2 (instruction by the base station 100-2), independently, the above-mentioned using the above shared bandwidth to send a signal to.
[0208]
　Thus, for example, radio communication between the terminal device in a cellular system 1 (e.g., wireless communication D2D communication or the LN in a cellular system) it is possible to more reliably ensure the shared bandwidth for.
[0209]
　(Terminal device 200-2: communication control unit 251)
　Description of the communication control unit 251 according to the second modification, except for the differences relating to the involvement of the base station 100-2, the communication control unit 251 according to the first modification is the same as the description. Thus, the description thereof is omitted to duplicate here.
[0210]
　The communication control unit 251 according to the second modification, rather than in response to the instruction from the base station 100-2, autonomously (e.g., wireless between the terminal devices in the cellular system 1 using the shared bandwidth or to communicate whether or not according to the judgment), to control the terminal device 200-2.
[0211]
　(Processing Flow)
　Examples of the processing of the terminal apparatus 200-2 according to a second modification of the second embodiment, except for the differences relating to principal (base station 100-2 and terminal 200-2), FIG. 20 is the same as the example of the processing of Figure 21 the base station 100-2 has been described with reference to. Thus, the description thereof is omitted to duplicate here.
[0212]
　<4.7. Combinations> between the second embodiment and the first embodiment
　second embodiment may be combined with the first embodiment described above. For example, operation of the second embodiment may be applied to the first embodiment described above.
[0213]
　For example, the communication control unit 151 of the base station 100-1 may further perform operation of the communication control unit 161 of the base station 100-2, the communication control unit 241 of the terminal apparatus 200-1, terminal 200-2 operation may be further performed in the communication control unit 251.
[0214]
　More specifically, for example, when occupying the shared bandwidth for a first period in the first embodiment for cellular communications, techniques may be used according to the second embodiment. More specifically, for example, a wireless communication device that performs cellular communication (e.g., base station 100 or the terminal device 200), when transmitting a signal using the shared bandwidth for a first period of time, using the shared bandwidth it may begin to transmit signals using the shared bandwidth before the period in which no signal is transmitted becomes DIFS and. Further, for example, a wireless communication device that performs cellular communication (e.g., base station 100 or the terminal device 200), when transmitting a signal using the shared bandwidth for a first period of time, the radio frame other frequency bands over a period of up disclosed, it may transmit the dummy signal using a shared bandwidth. Thus, for example, more reliably shared bandwidth can be ensured.
[0215]
　<< 5. Third Embodiment >> of
　Next, with reference to FIGS. 22 to 30, illustrating a third embodiment of the present disclosure.
[0216]
　<5.1. Summary>
　First, an outline of a third embodiment.
[0217]
　- Problems according to the third embodiment
　example, a device for performing wireless LAN communication, the period no signal is transmitted using a frequency band (channel) reaches the sum of the DIFS and back-off time, using the frequency band to signal (e.g., signal RTS frame) may send. The DIFS, for example, shorter than the LTE symbol (OFDM symbol or SC-FDMA symbols).
[0218]
　For example, the frequency band between cellular communications and wireless LAN communication (e.g., channel of the wireless LAN) is shared. In this case, for example, even while the above-mentioned frequency band is used for cellular communications, in any of the symbols, there may not be sent any signal in a cellular system using the frequency band. Therefore, devices for performing wireless LAN communication, even while the above-mentioned frequency band is used for cellular communications, it is possible to transmit a signal (e.g., signal RTS frame) by using the frequency band . Therefore, interference between the cellular communication and wireless LAN communication in the frequency band is generated, the communication quality of the cellular communication and / or the another wireless communication may be reduced.
[0219]
　Therefore, the mechanism that makes it possible to more appropriately used in a cellular system frequency band is shared between the cellular communication with other wireless communication is provided is preferable. More specifically, cellular communication and other wireless communication (e.g., wireless LAN communication) used in the above frequency band is the another wireless communication while a frequency band is shared between is used for cellular communications it is desirable to provide a mechanism that allows to prevent that it is.
[0220]
　- Third Embodiment Features
　According to the third embodiment, in any of the time, the radio communication apparatus which performs cellular communications, the frequency band is shared between the cellular communication with other wireless communication (i.e. , to transmit the signal using the shared bandwidth), the wireless communication device is controlled. Thus, for example, cellular communication and other wireless communication (e.g., wireless LAN communication) The frequency band is used for the another wireless communication while a frequency band is shared between is used for cellular communications it is possible to prevent the Rukoto.
[0221]
　<5.2. Configuration of Base Station>
　With reference to FIGS. 22 to 27, an example of a configuration of a base station 100-3 according to the third embodiment. Figure 22 is a block diagram showing an example of a configuration of a base station 100-3 according to the third embodiment. Referring to FIG. 22, base station 100-3 is provided with an antenna section 110, wireless communication unit 120, the network communication unit 130, a storage unit 140 and the processing unit 170.
[0222]
　Here, the antenna unit 110, the wireless communication unit 120, a description of the network communication unit 130 and the storage unit 140, except for the difference of the code, there is no difference between the first embodiment and the third embodiment. Thus, the description thereof is omitted to describe only the processing section 170, to duplicate here.
[0223]
　(Processing unit 170)
　processing unit 170, to provide a variety of functions of the base station 100-3. Processing unit 170 includes a communication control unit 171. The processing unit 170 may further include other components other than the communication control unit 171.
[0224]
　(Communication control unit 171)
　The communication control unit 171, in either time, the radio communication apparatus that performs cellular communication to transmit a signal using a shared bandwidth, and controls the wireless communication device. Said shared band, wireless communication cellular system 1 (i.e., cellular communication) is a frequency band is shared between the other radio communication.
[0225]
　(A) other radio communication
　example, the another wireless communication, wireless communication based on wireless LAN standards (i.e., wireless LAN communication) is. In this case, the shared bandwidth is shared between a cellular communications and wireless LAN communication. Said shared bandwidth is, for example, a channel of a wireless LAN.
[0226]
　(B) time of the unit
　communication control unit 171, in each symbol, the wireless communication device to transmit a signal using the shared bandwidth, and controls the wireless communication device. The above symbols are, for example, OFDM symbols or SC-FDMA symbols. Thus, for example, it is possible to eliminate the time of no signal.
[0227]
　(C) wireless communication device
　the wireless communication device is at least one of the base stations 100-3 and the terminal device 200-3.
[0228]
　　Case -FDD
　　　- downlink band
　Examples first, the FDD is employed in a cellular system 1, it said shared bandwidth is used as the downlink band in a cellular system 1. In this case, the wireless communication device is a base station 100-3. That is, the communication control unit 171, as the base station 100-3 transmits a signal using a shared bandwidth even (downlink band) to one of the time, controls the base station 100-3.
[0229]
　More specifically, for example, the communication control unit 171, the one or more resource elements of the inner shared bandwidth in each symbol, and maps the signal. Accordingly, the base station 100-3, in each symbol, and transmits the signal using the shared bandwidth.
[0230]
　　　- Uplink band
　as a second example, FDD is employed in a cellular system 1, said shared bandwidth is used in a cellular system 1 as an uplink band. In this case, the wireless communication device is a terminal device 200-3. That is, the communication control unit 171, the base station 100-3 is in any of the time to transmit the signal using the shared bandwidth (uplink band), and controls the terminal device 200-3.
[0231]
　More specifically, for example, the communication control unit 171, for uplink, to any time using the shared bandwidth to transmit a signal to instruct the terminal apparatus 200-3.
Thus, for example, the terminal device 200-3, (in each symbol) to be any time may transmit signals using the shared bandwidth. Incidentally, for example, this indication may be given by RRC signaling or system information.
[0232]
　　Case of -TDD
　as an example the third, is TDD is adopted in the cellular system 1, the shared bandwidth is used as the band of the downlink and uplink in a cellular system 1. In this case, for example, the wireless communication device is a base station 100-3 and terminal 200-3.
[0233]
　For example, the communication control unit 171, the base station 100-3 by using the shared bandwidth to any downlink time to send a signal to control the base station 100-3. More specifically, for example, the communication control unit 171, the downlink subframe, the one or more resource elements of the inner shared bandwidth in each symbol, and maps the signal. Accordingly, the base station 100-3, each symbol in the downlink sub-frame, and transmits the signal using the shared bandwidth.
[0234]
　Further, for example, the communication control section 171, as terminal 200-3 transmits a signal using the shared bandwidth to any uplink time, controls the terminal device 200-3. More specifically, for example, the communication control unit 171, for uplink, to any time using the shared bandwidth to transmit a signal to instruct the terminal apparatus 200-3. Thus, for example, the terminal device 200-3, one of (each symbol in the uplink subframe) uplink time also may transmit a signal using the shared bandwidth. Incidentally, for example, this indication may be given by RRC signaling or system information.
[0235]
　(D) transmitting power
　For example, the communication control unit 171, to any time, as the transmission power of a signal transmitted using the shared bandwidth is equal to or greater than a predetermined transmission power, controls the wireless communication device to.
[0236]
　For example, the wireless communication device is a base station 100-3, the communication control unit 171, for the downlink, to any time, the transmission transmitting power of a signal transmitted using the shared bandwidth is predetermined as equal to or greater than the power, to control the base station 100-3. More specifically, for example, the communication control unit 171 assigns the predetermined power than the transmission power of the signals transmitted using the shared bandwidth in each symbol.
[0237]
　Further, for example, the wireless communication device is a terminal device 200-3, the communication control unit 171, for uplink, in any time, the transmission power of a signal transmitted using the shared bandwidth is predetermined as it will become more transmit power, to control the terminal device 200-3. More specifically, for example, the communication control unit 171, a transmission power of a signal transmitted using the shared bandwidth, and instructs the terminal device 200-3.
[0238]
　Thus, for example, another wireless communication (e.g., wireless LAN communication) in an apparatus that performs the received power of the signal can reach a desired power. As a result, it may refrain from transmission of a signal which the device is used the shared bandwidth more reliably.
[0239]
　(E) signal transmission techniques
　　- transmission of the dummy signal
　for example, the communication control unit 171, at least, a symbol that the data signals and control signals of cellular system 1 using the shared bandwidth is not transmitted, the base station 100-3 but to send a dummy signal by using the above-mentioned shared bandwidth, to control the base station 100-3. Thus, for example, it is possible to reliably transmit the signal in each symbol of the downlink.
[0240]
　Note that the dummy signal is, for example, it is any signal other than a cellular system signal (control signal and data signal). The dummy signal, a busy tone for the wireless LAN communication performing unit.
[0241]
　　- Transmission of the dummy signal at some radio resource
　for example, the communication control unit 171, at least the symbol, the base station in a portion of the radio resources of the wireless resources arranged in the frequency direction over said shared bandwidth 100- 3 so as to transmit the dummy signal, to control the base station 100-3.
[0242]
　More specifically, for example, the communication control unit 171, at least, the symbol data signal and the control signal is not transmitted, and maps the dummy signal to one or more resource elements in said shared bandwidth (RE).
[0243]
　　　- Sending in some of the resource blocks
　for example, above a portion of the radio resources, said shared bandwidth over the frequency direction lined resource blocks: a part of the resource blocks of the (Resource Block RB). That is, the base station 100-3 transmits a dummy signal in a part of the RB of the RB arranged in the frequency direction over said shared bandwidth. This point will be described a specific example with reference to FIGS. 23 and 24.
[0244]
　Figure 23 is an explanatory diagram for explaining an example of a part of the resource block (RB) which the dummy signal is transmitted. Referring to FIG 23, it is shown RB arranged over shared bandwidth 71 and a plurality of slots. In this example, in one particular RB of the RB arranged in the frequency direction over shared bandwidth 71 in each slot, the dummy signal is transmitted. Incidentally, the other RB, the dummy signal is not transmitted.
[0245]
　Figure 24 is an explanatory diagram for explaining a first example of resource elements dummy signal is transmitted (RE). Referring to FIG. 24, (e.g., shown in FIG. 23) one of a portion of the RB dummy signal is transmitted is shown. In this example, among the RE included in the RB, of all the RE except for the RE for CRS (Cell-specific Reference Signal), a dummy signal is transmitted.

The scope of the claims
[Claim 1]
　A frequency band is shared between the wireless communication with another wireless communication cellular system, for a first period of time, occupied for the wireless communication of the cellular system, the frequency band, at least, the first for a second period of time corresponding to the period of the control unit, to be released from the wireless communication of the cellular system
device comprising a.
[Claim 2]
　Wherein the first time period, wherein a duration of more than one radio frame of a cellular system, according to claim 1.
[Claim 3]
　The first period is a period of continuous apparatus of claim 1.
[Claim 4]
　The second period of time, just before or period immediately following said first period, according to claim 3.
[Claim 5]
　The second period is a continuous period immediately following said first period, according to claim 4.
[6.]
　The second period of time, said a period immediately after the period immediately before and the first period of the first period, according to claim 4.
[7.]
　The second period is a continuous period immediately before the first period, according to claim 4.
[8.]
　The first period is a discontinuous period,
　the control unit, in the third period, occupying the frequency band for the radio communication of the cellular system over the first period, the release from the wireless communication of the cellular system over at least the second period of the frequency band,
according to claim 3.
[9.]
　It said second time period has a length of 90% to 110% of the length of the first period, according to claim 1.
[10.]
　The control unit, such that said wireless communication device that performs wireless communication with the cellular system transmits a signal using the frequency band over the first period, controls the wireless communication device that performs wireless communication of the cellular system by occupies the frequency band for the radio communication of the cellular system over the first period, according to claim 1.
[11.]
　Wherein, in any of the time, such that said wireless communication apparatus transmits signals using the frequency band, and controls the wireless communication apparatus, according to claim 10.
[12.]
　Wherein, in any of the time, so that the transmission power of a signal transmitted using said frequency band is equal to or higher than the predetermined transmission power, and controls the wireless communication apparatus, according to claim 11 apparatus.
[13.]
　Wherein, in each symbol, such that said wireless communication apparatus transmits signals using the frequency band, and controls the wireless communication apparatus, according to claim 11.
[14.]
　Wherein the control unit includes at least a symbol for data signals and control signals of the cellular system using the frequency band is not transmitted, so that the wireless communication device transmits a dummy signal using said frequency band, the It controls the wireless communication device, according to claim 13.
[15.]
　Wherein the control unit, at least the symbol, such that the in some wireless resources of the wireless resources arranged in the frequency direction over said frequency band radio communication apparatus transmits the dummy signal, the wireless communication device control the apparatus of claim 14.
[16.]
　Said portion of the radio resource is part of a resource block among the resource blocks arranged in the frequency direction over said frequency band, according to claim 15.
[17.]
　Said portion of the radio resource is part of a resource element included in each resource blocks arranged in the frequency direction over said frequency band, according to claim 15.
[18.]
　The apparatus, a base station that performs wireless communication of the cellular system, the base station apparatus for the base station, or a module for the base station apparatus,
　the control unit, for uplink, in any time also to transmit signals using the frequency band, and instructs the terminal device that performs wireless communication of the cellular system,
according to claim 11.
[19.]
　The control unit, for uplink, as in any of the time to transmit the signal using said frequency band, and instructs each of the plurality of terminal devices for performing wireless communication of the cellular system, in claim 18 device as claimed.
[20.]
　Wherein, for the uplink, at least, the symbol data signal and the control signal for the cellular system uses the frequency band is not transmitted, some of the wireless resources arranged in the frequency direction over said frequency band radio to transmit the dummy signal within the resource instructs the plurality of terminal apparatuses,
　the radio resource of the part is common between the plurality of terminal devices,
according to claim 18.
[21.]
　The device, a terminal device that performs wireless communication of the cellular system, or a module for the terminal device,
　the control unit, for uplink, the terminal device using said frequency band to either of time so it transmits a signal, for controlling the terminal device,
according to claim 11.
[22.]
　The other wireless communication is a radio communication based on wireless LAN (Local Area Network) standard,
　the control unit, a radio communication apparatus for performing wireless communication of the cellular system, using said frequency band, NAV (Network Allocation Vector) to transmit a frame including the duration information for setting, by controlling the wireless communication device, the frequency band over the first period of the wireless communication of the cellular system occupied for,
apparatus according to claim 1.
[23.]
　Wherein the control unit, by wireless communication apparatus for performing wireless communication of the cellular system so as not to transmit the signals using the frequency band over at least the second period, controls the wireless communication device, the frequency release from the wireless communication of the cellular system over at least the second period of the band, according to claim 1.
[24.]
　The wireless communication device is at least one of the base stations and the terminal apparatus for performing radio communication with the cellular system, according to claim 10.
[25.]
　The other wireless communication is a wireless communication conforming to a wireless LAN (Local Area Network) standard, according to claim 1.
[26.]
　Wherein, before the period in which no signal is transmitted using the frequency band becomes DIFS (DCF (Distributed Coordination Function) InterFrame Space), a wireless communication apparatus that performs wireless communication of the cellular system is the frequency band to begin to send a signal to use, to control the wireless communication device, apparatus according to claim 25.
[27.]
　Wherein, after said period no signal is transmitted using the frequency band is longer than SIFS (Short InterFrame Space), such that the wireless communication device starts to transmit a signal using said frequency band to, and controls the wireless communication apparatus, according to claim 26.
[28.]
　The control unit, wherein over a period of up radio frame starts on the other frequency bands used for wireless communication of a cellular system, a radio communication apparatus for performing wireless communication of the cellular system uses the frequency band to send a dummy signal, and controls the wireless communication apparatus, according to claim 25.
[29.]
　Wherein, before the radio frame for the other frequency bands used for wireless communication of the cellular system is initiated, the wireless communication apparatus for performing wireless communication of the cellular system, using said frequency band, to transmit a frame including the duration information for setting the NAV, and controls the wireless communication apparatus, according to claim 24.
[30.]
　The wireless communication device is at least one of the base stations and the terminal apparatus for performing radio communication with the cellular system, according to claim 26.
[31.]
　The apparatus, a base station that performs wireless communication of the cellular system, the base station apparatus for the base station, or a module for the base station apparatus, according to claim 1.
[32.]
　The apparatus, the terminal apparatus for performing radio communication cellular system, or a module for the terminal apparatus, according to claim 1.
[33.]
　By the processor, a frequency band is shared between the wireless communication with another wireless communication cellular system, for a first period of time, occupied for the wireless communication of the cellular system, the frequency band, at least, for a second period corresponding to the first period, that, to release from the wireless communication of the cellular system
method comprising.