[0001]The present invention, relates to the use control of the shared frequency by the wireless communication system.
BACKGROUND
[0002]It recognizes the surrounding radio environment, cognitive radio is known which optimizes the communication parameters in accordance with the radio environment. Examples of cognitive radio can include a case where a plurality of radio systems share a frequency band. For example, there are cases where a certain radio system (referred to as primary system) (referred to as secondary system) preferentially the frequency band available for other wireless system utilizes secondary. The Institute of Electrical and Electronic Engineers (IEEE) 802.22, local wireless network of licensed frequency bands to TV broadcasting system as the primary system (TV channel) as a secondary system that utilizes secondary (Wireless Regional Area Network: WRAN) of standardization are discussed.
[0003]
　When the frequency band licensed to the primary system secondary system utilizes a secondary, the secondary system needs to be prevented from affecting the service that the primary system is provided. Therefore, the secondary system in order to avoid interference to the primary system, as if using a frequency band that is not temporally or spatially use by the primary system, or provided to the primary system interference is below acceptable levels adjusting the transmit power (e.g., see Patent Document 1).
[0004]
　As an example of a cognitive radio, the primary system is a TV broadcasting system, consider the secondary system is assumed to be a cellular system has been actively conducted. Incidentally, TV frequency band that is not time or space used in the broadcast system, TV white space: (see, for example, Non-Patent Document 1) (White Space WS) to be called.
[0005]
　As cognitive radio technique for identifying a frequency band unused, Geo-location Database (GDB), frequency sensing, and a beacon (or Cognitive Pilot Channel (CPC)) are known. Of these two or more, for example, GDB and frequency sensing or GDB beacon, even if the are used in combination. GDB provides usage information, or a secondary available (i.e. unused) frequency band (eg TVWS) of shared frequency band corresponding to the geographical location (eg TV band ').
[0006]
　For example, assignment of TVWS to Long Term Evolution (LTE) system is a cellular system is executed by the following procedure.
(1) notifies the base station of the operation management apparatus of the LTE system wishes to use the TVWS information (ie an evolved Node B (eNB)) in GDB. Operation management apparatus, the operation management system, Operation Administration and Maintenance (OAM) system, or also referred to as Central Control Point. The base station information includes, for example, information indicating the geographical location and antenna height of the base station.
(2) GDB, the base station information, based on the frequency band, and the calculation formula of the propagation loss, and determining at least one candidate frequency possible secondary usage, provides this to the management apparatus.
(3) the operation control unit transfers the information of at least one candidate frequency notified from GDB to the base station.
(4) the base station based on the radio terminal (ie User Equipment (UE)) by the candidate frequency sensing result attributable to own cell, frequencies used in the own cell from at least one candidate frequency (hereinafter, allocation to select the frequency). For example, the base station, the smallest candidate frequency interference power measured by the wireless terminal is selected as allocated frequency to be used in the own cell.
(5) base station provides communication using the assigned frequency selected service.
CITATION
Patent Document
[0007]
Patent Document 1: JP 2011-166721 JP
Non-patent literature
[0008]
Non-Patent Document 1: ETSI TR 102 907 V1.1.1 ( 2011-10), "Reconfigurable Radio Systems (RRS); Use Cases for Operation in White Space Frequency Bands", 2011 10 years dated
Non-Patent Document 2: 3GPP TS 37.320 V10 .4.0 (2011-12), "Radio measurement collection for Minimization of Drive Tests (MDT); Overall description", 2011 Nian 12 Yue
Summary of the Invention
Problems that the Invention is to Solve
[0009]
　Assigning example TVWS to LTE system described above, the wireless terminal (UE) must support a frequency sensing functions related to cognitive radio. In other words, the radio terminal (UE), in addition to the measurement functions (or measurement procedure (procedure)) of the downlink signal that is being requested by the LTE specification, unless supported frequency sensing functions related to cognitive radio (or sensing procedure) not not. This can lead to hardware or scale increases or complexity of the software of the wireless terminal (UE).
[0010]
　One of the objects of the present invention, shared frequency shared by a plurality of radio systems (eg TVWS) when using the wireless communication system, can contribute to simplification of the measurement function should wireless terminal supports a radio terminal, the radio station is to provide wireless communication system, a method to be mounted on, and a program.
Means for Solving the Problems
[0011]
　In a first aspect, is used in a wireless communication system, a wireless terminal for communicating with the radio station is provided. The wireless terminal includes a measuring unit. The measurement unit, by using the terminal measurement procedure for performing a first terminal measurements corresponding to the radio access technology applied to the wireless communication system, is shared by a plurality of radio systems including the wireless communication system operative to perform a second terminal measurements in shared frequency that.
[0012]
　In a second aspect, it is used in a wireless communication system, a radio station which communicates with at least one wireless terminal is provided. The radio station includes a measurement control unit. The measurement control unit uses the terminal measurement procedure for controlling the first terminal measurements corresponding to the radio access technology applied to the wireless communication system, shared by a plurality of radio systems including the wireless communication system It operates to control the second terminal measurement in a shared frequencies.
[0013]
　In a third aspect, the wireless communication system includes at least one wireless terminal communicating with the radio station and the radio station. Wherein the at least one wireless terminal, using the terminal measurement procedure for performing a first terminal measurements corresponding to the radio access technology applied to the wireless communication system, a plurality of radio systems including the wireless communication system in operative to perform a second terminal measurements in shared frequency shared.
[0014]
　In a fourth aspect, is used in a wireless communication system, implemented method is provided to a wireless terminal communicating with the radio station. The method utilizes the terminal measurement procedure for performing a first terminal measurements corresponding to the radio access technology applied to the wireless communication system, it is shared by a plurality of radio systems including the wireless communication system It includes performing a second terminal measurement in a shared frequency.
[0015]
　In a fifth aspect, it is used in a wireless communication system, a method implemented in a radio station which communicates with at least one wireless terminal is provided. The method utilizes the terminal measurement procedure for controlling the first terminal measurements corresponding to the radio access technology applied to the wireless communication system, it is shared by a plurality of radio systems including the wireless communication system and controlling the second terminal measurement in a shared frequency.
[0016]
　In a sixth aspect, the program for causing the method according to the fourth aspect described above to a computer is provided.
[0017]
　In a seventh aspect, a program for causing the method according to the fifth aspect of the above in a computer is provided.
Effect of the invention
[0018]
　According to the aspects described above, which can contribute a shared frequency shared by a plurality of radio systems (eg TVWS) when using the wireless communication system, the simplification of the measurement function should wireless terminal supports wireless terminal, the wireless station can provide wireless communication system, a method to be mounted on, and a program.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019]
FIG. 1 is a diagram illustrating a configuration example of a wireless communication system according to the first embodiment.
[2] is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system according to the first embodiment.
3 is a diagram showing another configuration example of the radio communication system according to the first embodiment.
4 is a diagram showing another configuration example of the radio communication system according to the first embodiment.
5 is a diagram showing another configuration example of the radio communication system according to the first embodiment.
6 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system according to the second embodiment.
7 is a diagram showing a configuration example of a wireless network including a radio communication system according to the third embodiment.
8 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system according to the third embodiment.
9 is a flowchart showing an example of operations relating to use control of the shared frequency by the wireless station according to the third embodiment.
FIG. 10 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system according to a fourth embodiment.
11 is a flowchart showing an example of an operation related to the use control of the shared frequency by the wireless station according to the fourth embodiment.
12 is a flowchart showing an example of an operation related to the use control of the shared frequency by the operation management device according to the fourth embodiment (OAM).
13 is a sequence diagram showing a specific example of the terminal measurement procedure in a shared frequency in a wireless communication system according to a fifth embodiment.
14 is a diagram showing a first specific example of measurements by the wireless terminal according to a fifth embodiment.
15 is a diagram showing a second specific example of the measurement by the wireless terminal according to a fifth embodiment.
16 is a diagram showing a third specific example of the measurement by the wireless terminal according to a fifth embodiment.
17 is a diagram showing a configuration example of a wireless network including a radio communication system according to a sixth embodiment.
18 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system according to a sixth embodiment.
19 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system according to a seventh embodiment.
FIG. 20 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system according to the eighth embodiment.
DESCRIPTION OF THE INVENTION
[0020]
　Hereinafter, specific embodiments will be described in detail with reference to the drawings. In the drawings, the same or corresponding components are denoted by the same reference numerals, for clarity of description, repeated explanation is omitted as appropriate.
[0021]

　FIG 1 shows a configuration example of a wireless communication system 100 according to this embodiment. Wireless communication system 100 may be a cellular system (eg LTE system, Universal Mobile Telecommunications System (UMTS) , CDMA2000 systems (EV-DO, 1xRTT, HPRD ), or Global System for Mobile Communications (GSM) system) may be used. The wireless communication system 100, non-cellular systems may be (eg WiMAX system, wireless Local Area Network (LAN) system).
[0022]
　Wireless communication system 100 includes a wireless station 1, the wireless terminal 2, and the frequency control unit 3. Radio station 1 operates the cell 11, communicating with the wireless terminal 2 belonging to the cell 11. Radio station 1 is, for example, a base station, a relay station (Relay Node (RN)), or called an access point. Wireless terminal 2, for example, the mobile station, referred to as User Equipment (UE), or Wireless Transmit / Receive Unit (WTRU). Cell 11 refers to the coverage area of ​​the wireless station 1. Cell 11, may be a sector cell.
[0023]
　Frequency control unit 3 is operative to control the use by the wireless station 1 of shared frequency shared by a plurality of radio system comprising a radio communication system 100. Frequency control unit 3, for example, may determine the availability of shared frequency according to the radio station 1. The frequency control unit 3 may determine whether or not to use the shared frequency for communication between the radio station 1 and the wireless terminal 2. The frequency control unit 3 may determine the allocation frequency of the radio station 1 from the candidate frequencies including shared frequency. Allocated frequency is the frequency used for communication between the radio station 1 and the wireless terminal 2.
[0024]
　Shared frequency, for example as in TVWS, may be licensed frequency band to the primary system. In this case, the wireless communication system 100 as a secondary system, for example, can be utilized to secondary shared frequency if the shared frequency is not time or space used by the primary system. In other words, the wireless communication system 100 can be used not only a licensed frequency to the wireless communication system 100, the shared frequency unlicensed wireless communication system 100 (eg TVWS) can be utilized secondary. In addition, the primary system may not be present. In this case, the shared frequency, the plurality of radio communication systems, for example, may be shared equally by a plurality of wireless communication systems operated by different operators. A plurality of wireless communication system may also include a system only using the same radio access technology (eg LTE), different radio access technologies (eg LTE, CDMA2000, GSM, WiMAX) may include a system using.
[0025]
　As already mentioned, in the wireless communication system 100 to the shared frequency such as TVWS wireless terminal 2 must support a frequency sensing functions related to cognitive radio. This can lead to increase in scale or complexity of the hardware or software of the wireless terminal 2.
[0026]
　To address this problem, in this embodiment, the wireless terminal 2 includes a measurement unit 20. Measuring section 20, a radio access technology (eg LTE, CDMA2000, GSM, WiMAX) is a terminal measurement procedures implemented in the wireless terminal 2 to perform a first terminal measurement defined by applied to a wireless communication system 100 using the operative to perform a second terminal measurement in a shared frequency. Results of the second terminal measurement is supplied to the frequency control unit 3 is used to control the use of shared frequency according to the radio station 1.
[0027]
　On the other hand, the radio station 1 in order to perform in cooperation with the first and second terminal measurements described above the wireless terminal 2 includes a measurement control unit 10. Measurement control unit 10 is operative to control the first and second terminal measurements described above.
[0028]
　The first terminal measurement comprises measuring the radio characteristics of the licensed least the wireless communication system 100 frequency (ie license band). The first terminal measurement, wireless access technology applied to wireless communication system 100 (eg LTE, UMTS, CDMA2000 , GSM, WiMAX) is carried out using a terminal measurement procedure corresponding to. In other words, the first terminal measurements are made using terminal measurement procedure defined (or defined) by a radio access technology applied to wireless communication system 100. Terminal measurement procedures generally include signaling between the radio station 1 and the wireless terminal 2. For example, the radio station 1 requests the terminal measurement report to the radio terminal 2 by using a predetermined request message. Request message, for example, the frequency to be measured, the reported measurement item to be, and specify at least one of the measurement period. Wireless terminal 2 according to the request message, performs measurement for the specified frequency. Then, the wireless terminal 2 transmits a terminal measurement report indicating the measurement result to the radio station 1. Terminal measurement report includes, for example, the following at least one of (a) ~ (e).
; (A) receiving power or the received signal strength of the signal of the wireless communication system 100 in shared frequency
; reception quality of (b) signal of the wireless communication system 100 in the shared frequency
channel quality of a wireless communication system 100 in (c) shared frequency;
(d) information about the shared frequency (eg preferred frequency, priority); and
(e) the reception power or the reception intensity of the primary system of signals in a shared frequency.
[0029]
　The first terminal measurement and terminal measurement procedures generally supports measurement of multiple licenses bands. For example, the terminal measurement procedure for the measurement of multiple licenses bands, including between different-frequency measurement (inter-frequency measurement) procedure. Alternatively, the terminal measurement procedures may include procedures for measuring the secondary cell while the primary cell and the secondary cell is set in the wireless terminal 2 by the radio station 1. Primary cell and secondary cell uses a different license band from each other. Radio station 1 is configured to operate a plurality of cells including a primary cell and a secondary cell, for example, carrier aggregation (Carrier Aggregation (CA)), or called dual cell operation (dual-cell operation).
[0030]
　The terminal measurement procedure, the wireless terminal 2 performs measurement of one or more licenses band in the radio station 1 and the wireless connection, measurements and procedures for reporting the location information of the wireless terminal 2 to the radio station 1 it may include a. The terminal measurement procedure performs measurement of one or more licenses band in the period in which the wireless terminal 2 is not the radio station 1 and the wireless connection, save the position information of the measurement results and the wireless terminal 2 as a log, radio station 1 and the like may also contain a procedure for reporting log to the radio station 1 during radio connection. The former procedure, for example, immediate MDT (Immediate Minimization of Drive Test), the latter procedure (see Non-Patent Document 2), for example, called logs MDT (the Logged MDT).
[0031]
　Measurement control unit 10 and the measurement unit 20 uses the first terminal measurement procedure for the terminal measurements described above, to perform the second terminal measurement in a shared frequency. For example, the measurement control unit 10 and the measuring unit 20, the inter-frequency measurement procedure for measuring the license band, unlicensed band (or proprietary may frequency band that is not licensed as a frequency) measurement of shared frequency is it may be applied to. The measurement control unit 10 and the measurement unit 20 may apply a secondary cell measurement procedure in a carrier aggregation (or dual cell operation) for the measurement of the shared frequency.
[0032]
　Figure 2 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in this embodiment. In step S101, the wireless terminal 2 in accordance with an instruction of the radio station 1, to obtain the radio characteristics of the shared frequency, performing a terminal measurement procedure. In the example of FIG. 2, the terminal measurement procedure includes the steps S102 ~ S104. In step S102, the radio station 1 transmits a terminal measurement report instruction in shared frequency to the wireless terminal 2. Terminal measurement report instructions, for example, be transmitted using a control channel or a data channel available in the license band. In step S103, the wireless terminal 2 measures the shared frequency according to the terminal measurement report instruction. In step S104, the wireless terminal 2 transmits a terminal measurement report including the measurement result in the shared frequency to the radio station 1. Terminal measurement report is transmitted, for example, using a control channel or a data channel available in the license band.
[0033]
　In step S105, the radio station 1 transmits a terminal measurement report to the frequency control unit 3. Note that step S105 may be omitted if the frequency control unit 3 are integrally disposed with the radio station 1. In step S106, the frequency control unit 3, based on the measurement terminal measurement report including the at shared frequency, to control the use of the shared frequency according to the radio station 1.
[0034]
　Terminal measurement procedure shown in FIG. 2 (S101), for example, it may be executed periodically, or may be executed non-periodically. Execution of aperiodic terminal measurement procedure (S101), for example, the operation management apparatus (OAM), frequency management device, or may be triggered with a request from the GDB. Frequency management system, Spectrum Manager (SM), also called frequency management system, or a Central Control Point. Also, the radio station 1 may start spontaneously terminal measurement procedure (S101) when a predetermined condition is satisfied. The terminal measurement procedure (S101) may be performed simultaneously for a plurality of candidate frequencies included in shared frequency (fractional frequency) may be performed for each one candidate frequency.
[0035]
　The frequency control unit 3 described in this embodiment, review of the allocated frequency to the radio station 1 (updating) procedure may be performed. The frequency control unit 3, the procedure releases the allocated frequency (i.e., To stop using the shared frequency by the wireless station 1) may perform. Frequency control unit 3, for example, (in other words, if it meets a predetermined release condition) when no longer satisfy the predetermined condition relates to the use of shared frequency, even stop using the shared frequency by the radio station 1 good.
[0036]
　The frequency control unit 3 controls the use of the shared frequency by the wireless station 1, for example, the judgment or whether to use the shared frequency, in order to make a determination of whether to allow use of the shared frequency, the terminal measurement reports it may be taken into consideration the different other conditions and. For example, the frequency control unit 3 may be considered the geographical location of the wireless station 1. Specifically, the frequency control unit 3, the geographic location of the wireless station 1 may determine whether the area to be allowed to use the shared frequency. The frequency control unit 3 may be considered available frequencies radio station 1. Specifically, the frequency control unit 3 may also determine whether include shared frequency in the available frequency range of the radio station 1. The frequency control unit 3, the maximum value or the minimum value of the downlink transmission power radio station 1 may be considered.
[0037]
　As described above, in this embodiment, the radio station 1 and the wireless terminal 2 is defined (or defined) radio access technology applied to wireless communication system 100 (eg LTE, UMTS, CDMA2000, GSM, WiMAX) by using the terminal measurement procedure for performing a first terminal measurements, operative to perform a second terminal measurement in a shared frequency. Therefore, the wireless terminal 2 does not need to support additional measurement procedure for measuring the shared frequency. Thus, this embodiment, when the wireless communication system 100 a shared frequency (eg TVWS) that is shared by a plurality of radio systems used, which can contribute to simplification of the measurement function should the radio terminal 2 supports .
[0038]
　Incidentally, the arrangement of the frequency control unit 3, based on the network architecture design concepts, or according to the radio communication standard, is appropriately determined. For example, as shown in FIG. 3, the frequency control unit 3 may be integrally disposed with the radio station 1. In this case, the radio station 1 is, for example, may be determined using the shared frequency by the following procedure. First, the radio station 1 having a frequency control unit 3 transmits to the operation management apparatus (OAM) not shown an allocation request of the shared frequency. Next, the radio station 1 receives a notification indicating at least one candidate frequency from the operation management device (OAM). Each candidate frequency may be the unused subbands included in shared frequency. Then, the radio station 1 determines a "allocated frequency" is used in the wireless station 1 from at least one candidate frequency. Finally, the radio station 1 transmits to the operation management apparatus Report (allocation frequency report) indicating the allocated frequency selected.
[0039]
　Further, as shown in FIG. 4, the frequency control unit 3 may be integrally disposed and 4 operation management apparatus (OAM). In this case, the operation management device 4, for example, may be determined using the shared frequency by the radio station 1 by the following procedure. First, the operation management device 4 receives an allocation request of a shared frequency from the radio station 1. Next, the operation management apparatus 4 sends a request for terminal measurement report to the radio station 1 receives the terminal measurement report sent back from the radio station 1. Then, the operation management apparatus 4 uses the received terminal measurement reports, determining the "allocated frequency" to the radio station 1. Finally, the operation management device 4, notifies the determined "allocated frequency" to the radio station 1.
[0040]
　Further, as shown in FIG. 5, the frequency control unit 3 may be integrally disposed with the frequency management device 5. Frequency management device 5, Spectrum Manager (SM), or also called frequency management system. Frequency management unit 5 manages the allocation of shared frequency for a plurality of radio system comprising a radio communication system 100. A plurality of wireless systems typically include a system operated by different operators.
[0041]

　In the present embodiment, a description will be given of modifications of the first embodiment. Configuration example of a wireless communication system 100 according to this embodiment, may be 1, 3, 4, or of the first embodiment shown in 5 configuration and the same.
[0042]
　Figure 6 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system 100 according to this embodiment. As is apparent from a comparison of FIG. 6 and FIG. 2, FIG. 6 includes a step S201. In step S201, the radio station 1, for the second terminal measurements by the wireless terminal 2 transmits a certain signal in a shared frequency. Specific signal is transmitted to a predetermined period or a predetermined timing, it is transmitted during at least the measurement of the shared frequency by the wireless terminal 2 (step S103) is performed. In other words, a particular signal, before the use of the shared frequency in a communication between the radio station 1 and the wireless terminal 2 is officially permitted by the frequency control unit 3, it is transmitted experimentally. Therefore, the specific signal may also be referred to as a test signal or training signal. Here, the predetermined period of time a specific signal is transmitted, the provisional operation period for using the shared frequency may be referred to as preparation period or test duration. Provisional operation period is a period for determining whether it is possible to use a period for determining whether to use the shared frequency or shared frequency. Further, the predetermined timing as a reference for transmission of the characteristic signal, the time, and is believed to update the use of time to determine the use of the shared frequency or shared frequency.
[0043]
　Specific signal may be imposed constraints than the radio signals transmitted in the normal communication between the radio station 1 and the wireless terminal 2. For example, a particular signal may not include a data channel signal for transmitting user data. That is, a particular signal, without the data channel signal, the pilot signal, the reference signal, and may include at least one of the synchronizing signals.
[0044]
　Constraints to the transmission power of a particular signal may be imposed. For example, a particular signal may be transmitted at lower transmission power than the downlink signal at a frequency which is licensed to the wireless communication system 100 (ie license band). Also, certain signals may be transmitted at a transmission power below the upper limit imposed by the management system of the shared frequency. The management system of shared frequency is, for example, a frequency management device 5, or the Geo-location Database (GDB).
[0045]
　Processing in steps S101 ~ S106 in FIG. 6 may be the same as the processing in the steps of the same reference numerals shown in FIG. The measurement report instruction in step S102 may include the configuration information for a specific signal transmitted from the wireless station 1.
[0046]
　As described above, the present embodiment, while transmitting a specific signal in the shared frequency from the radio station 1, the wireless terminal 2 performs a second terminal measurement. Therefore, the wireless terminal 2, the second terminal measurements in shared frequency, worn by measuring the received power or the reception quality of the specific signal transmitted from the wireless station 1. This has the advantage described below. That is, the wireless terminal 2 is merely sensing, i.e. the measurement of the interference power from other wireless systems (eg primary system), only do, it may be insufficient for the determination of a frequency suitable for radio communication system 100. This is because the communication quality when a wireless communication system 100 is using the shared frequency (eg throughput) is to depend on the received power or receiving quality in the wireless terminal 2 of the shared frequency signal transmitted from the wireless station 1. Thus, mere sensing can not guarantee that the communication quality when a wireless communication system 100 is using the shared frequency is sufficient. In contrast, the present embodiment is that the wireless terminal 2 can receive shared frequency signal from the radio station 1 (ie specific signal) in sufficient quality, in other words that the wireless communication system 100 can effectively use the shared frequency , it can be guaranteed.
[0047]

　In the present embodiment, the arrangement of the frequency control unit 3 described in the first and second embodiments, and a specific example of procedure for allocating shared frequency to the radio station 1 is explained. Specifically, the present embodiment shows an example in which the frequency control unit 3 are integrally disposed with the radio station 1.
[0048]
　Figure 7 shows a configuration example of a wireless network including a wireless communication system 100 according to this embodiment. In the example of FIG. 7, the operation management apparatus (OAM) 4 manages a plurality of wireless stations 1. Operation management apparatus (OAM) 4 communicates with the frequency management device (SM) 5, receives the shared frequency information from the frequency management device (SM) 5. Shared frequency information indicates the available shared frequency (ie at least one candidate frequency). Incidentally, the operation management apparatus (OAM) 4 may receive directly shared frequency information from the Geo-location Database (GDB) without going through the 5 frequency management device (SM).
[0049]
　Figure 8 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system 100 according to this embodiment. In step S301, the radio station 1 transmits the frequency assignment request operation management apparatus (OAM) to 4. In step S302, the operation management apparatus (OAM) 4 obtains information of assignable candidate frequency among shared frequency. Operation management apparatus (OAM) 4 may be receiving information of the candidate frequencies from the frequency management device (SM) 5 or GDB. In step S303, 4 operation control unit (OAM) sends a notification indicating at least one candidate frequency to the radio station 1.
[0050]
　Processing in steps S201 and S101 ~ S104 in FIG. 8 is the same as the processing in steps of the same reference numerals shown in FIG. In other words, the radio station 1 and the wireless terminal 2 (in this case the candidate frequency) shared frequency from the radio station 1 while transmitting a specific signal in, a second terminal measurements in shared frequency (candidate frequencies). The second terminal measurements are made using radio radio access technology applied to the communication system 100 (eg LTE, UMTS, CDMA2000, GSM, WiMAX) defined by (or defined) by the terminal measuring procedure. In the case the candidate frequency is more, the radio station 1 and the wireless terminal 2 may be performed a second terminal determined for each candidate frequency.
[0051]
　In step S304, the radio station 1, based on the terminal measurement results of each candidate frequency, determines the "allocated frequency" is used in the wireless station 1 from at least one candidate frequency. Specifically, the radio station 1 is lower interference power from other wireless systems, and a high reception quality of a particular signal measured candidate frequencies may be selected as the "allocated frequency".
[0052]
　In step S305, the radio station 1 transmits a report indicating the selected "allocated frequency" operation management apparatus (OAM) to 4. In the case where one of the candidate frequency did not satisfy the determination condition of the allocated frequency, the radio station 1 may transmit reporting operation management apparatus (OAM) to 4 indicating not to perform a frequency assignment. In step S306, the operation management apparatus (OAM) 4, based on a report from the radio station 1, and updates the information of the candidate frequency. However, step S306 may be omitted.
[0053]
　Procedure shown in FIG. 8 is only one example. For example, the operation management apparatus (OAM) 4 for the acquisition of candidate frequency information (S302) may be performed in advance prior to the procedure of FIG. Also, without transmitting the radio station 1 is a frequency allocation request (S301), the operation management apparatus (OAM) 4 may notify the candidate frequency spontaneously radio station 1.
[0054]
　Figure 9 is a flowchart showing an example of operations relating to use control of the shared frequency according to the radio station 1. In step S401, the radio station 1 determines whether it is necessary to allocate a shared frequency. Radio station 1 is, for example, load cell 11 in the license-band (eg traffic, the wireless terminal number, etc.) may be determined that it is necessary to add the shared frequency if it exceeds a predetermined reference. Step S402 corresponds to step S301 in FIG. 8. That is, in step S402, the radio station 1 transmits the frequency assignment request operation management apparatus (OAM) to 4.
[0055]
　Step S403 corresponds to step S303 in FIG. 8. That is, in step S403, the radio station 1 determines whether it has received a candidate frequency notification. Step S404 corresponds to step S203 in FIG. 8. That is, the wireless station 1, when receiving the candidate frequency notification (at step S403 YES), it transmits a specific signal in the candidate frequency. Step S405 and S406 correspond to the indicated terminal measurement procedure in FIG. 8 (S101). That is, the wireless station 1, while transmitting a specific signal at the candidate frequency, and transmits the terminal measurement report instruction candidate frequency to the wireless terminal 2 receives the terminal measurement report sent back from the wireless terminal 2.
[0056]
　Step S407 corresponds to step S304 in FIG. 8. That is, in step S407, the radio station 1, based on the terminal measurement report, to determine the "allocated frequency" of the own cell 11A from among the at least one candidate frequency.
[0057]
　Step S408 corresponds to step S305 in FIG. 8. That is, in step S308, the radio station 1A transmits the allocated frequency reporting operation management apparatus (OAM) to 4. Allocated frequency report indicates that either indicating the candidate frequency determined as allocated frequency, or does not perform frequency allocation.
[0058]
　Just as described in the first embodiment, the frequency control unit 3, the procedure releases the allocated frequency (i.e., To stop using the shared frequency by the wireless station 1) may perform.
[0059]
　Further, the operation management apparatus (OAM) 4, when notifying the candidate frequency to the radio station 1 (signal type for eg transmission, transmission power setting) constraints for a particular signal may be notified to the radio station 1. Also, use management unit (OAM) 4 is notified time to perform a second terminal measurement by radio station 1, or good timing or duration also transmit a specific signal from the radio station 1 and the radio station 1 it may be. Further, the operation management apparatus (OAM) 4, when notifying the candidate frequency to the radio station 1 may notify the upper limit value of the downlink transmission power. Further, the operation management apparatus (OAM) 4 may notify the absolute time or relative time shows a usable life of the candidate frequency to the radio station 1. These may be in common between the candidate frequencies can be different.
[0060]

　In the present embodiment, the arrangement of the frequency control unit 3 described in the first embodiment, and a specific example of procedure for allocating shared frequency to the radio station 1 is explained. Specifically, the present embodiment shows an example in which the frequency control unit 3 are integrally disposed and the operation management apparatus (OAM) 4. Note that the configuration example of a wireless network including a wireless communication system 100 according to this embodiment may be the substantially the same as configuration of the second embodiment shown in FIG. However, the frequency control unit 3 is arranged in the radio station not 1 operation control unit (OAM) 4.
[0061]
　Figure 10 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in a wireless communication system 100 according to this embodiment. Processing in step S301, S302, S201, and S101 ~ S104 in FIG. 10 may be the same as the processing in the steps of the same reference numerals shown in FIG.
[0062]
　In step S503 of FIG. 10, the operation management apparatus (OAM) 4, in addition to the candidate frequency notification, transmits an indication of the terminal measurement report to the radio station 1A and 1B. Specifically, the candidate frequency notifies the terminal measurement report indication may be separate message. The terminal measurement report instruction may not be sent explicitly. For example, candidate frequency notification may be defined in advance to mean also an indication of the terminal measurement report in the candidate frequency indicated on it.
[0063]
　In step S504, in response to the terminal measurement report instruction from the operation management device (OAM) 4, the wireless station 1 sends a terminal measurement report to the management apparatus (OAM) 4. In step S505, the operation management apparatus (OAM) 4 determines the allocation frequency of the radio station 1A. In other words, the operation management apparatus (OAM) 4 determines whether or not to use the shared frequency for radio station 1 (or, whether or not to permit the use of shared frequency by the wireless station 1). In the determination of step S505, the terminal measurement report is considered.
[0064]
　At step S506, the operation management apparatus (OAM) 4 to the radio station 1, and notifies the determined allocated frequency. In the case where neither satisfy the conditions for any of the candidate frequency, the operation management apparatus (OAM) 4 notifies not to perform frequency allocation to the radio station 1. At step S507, the operation management apparatus (OAM) 4 updates the information of the candidate frequency. However, step S507 may be omitted.
[0065]
　Procedure shown in FIG. 10 is merely one example. In a manner similar to that described with respect to FIG. 8, for example, the timing of the operation management apparatus (OAM) 4 for the acquisition of candidate frequency information (S302) may be appropriately changed. Also, the radio station 1 without transmitting the frequency assignment request (S301), may transmit the operation management apparatus (OAM) 4 candidate frequency notified to voluntarily radio station 1 and the terminal measurement report instruction.
[0066]
　Figure 11 is a flowchart showing an example of operations relating to use control of the shared frequency according to the radio station 1. Processing in step S401, S402, and S404 ~ S406 of FIG. 11 may be the same as the processing in the steps of the same reference numerals shown in FIG.
[0067]
　Step S603 of FIG. 11 corresponds to step S503 in FIG. 10. That is, in step S603, the radio station 1 determines whether it has received a candidate frequency notification and terminal measurement report instruction. When receiving these (YES in step S603), the radio station 1 controls the terminal measurements in the Candidate Frequency while transmitting a specific signal (steps S404 ~ S406).
[0068]
　Step S607 and S608 of FIG. 11 correspond to steps S504 and S505 in FIG. 10. That is, the radio station 1A transmits a terminal measurement report operation management apparatus (OAM) to 4 (step S607). Then, in step S608, the radio station 1 determines whether it has received the notification of allocated frequency. When receiving a notification of the allocated frequency (YES at step S608), the radio station 1 sets the cell 11A using the assigned frequency, may start the communication with the wireless terminal 2.
[0069]
　Figure 12 is a flowchart showing an example of operations relating to use control of the shared frequency by 4 operation management apparatus (OAM). Step S701 corresponds to step S301 in FIG. 10. That is, the operation management apparatus (OAM) determines whether it has received a frequency assignment request from the radio station 1 (step S301). Step S702 and S703 correspond to steps S503 and S504 in FIG. 10. That is, the operation management apparatus (OAM) 4 sends a candidate frequency notification and terminal measurement report instruction (step S702). Then, the operation management apparatus (OAM) 4 determines whether it has received a terminal measurement report (step S703).
[0070]
　Step S704 ~ S706 in FIG. 12 correspond to steps S505 ~ S507 in FIG. 10. That is, in step S704, the operation management apparatus (OAM) 4, based on the terminal measurement report received from the wireless station 1, determines the "allocated frequency" to the radio station 1 from at least one candidate frequency. At step S705, the operation management apparatus (OAM) 4 transmits the allocated frequency notified to the radio station 1. Then, in step S706, the operation management apparatus (OAM) 4, depending on the assignment of the candidate frequency to the wireless station 1, and updates the information of the candidate frequency.
[0071]

　In the present embodiment, specifically described when the radio communication system 100 according to the first to fourth embodiments described above is a LTE system. If the wireless communication system 100 is a LTE system, the radio station 1 corresponds to "the radio base station (ie eNB)", the wireless terminal 2 corresponds to "UE". The terminal measurement procedure described in the first to fourth embodiments may be referred to as UE measurement procedures (UE measurement procedure).
[0072]
　In the present embodiment, the terminal measurement reports, for example, may include at least one of the following (1a) ~ (1e).
(1a) the received power of the LTE system 100 of the signal at the shared frequency (Reference Signal Received Power (RSRP) ) , or the reception intensity (Received Signal Strength Indicator
(RSSI)); (1b) receiving the signal of the wireless communication system 100 in the shared frequency quality (Reference Signal Received quality
(RSRQ));
; (1c) channel quality of the LTE system 100 in shared frequency (channel quality Indicator (CQI) or channel State information (CSI)) preferred information (eg about (1d) shared frequency frequency, priority); and
(1e) the received power of the primary system of the signal in the shared frequency (received Interference power) or the reception intensity force (received Interference signal strength).
[0073]
　Further, in the present embodiment, eNB1 may transmit by the terminal measurement report instruction to the UE2 "RRC Connection Reconfiguration". Further, UE2 may be transmitted as a terminal measurement report "(UE) Measurement Report" to the eNB1.
[0074]
　Figure 13 is a sequence diagram showing a specific example of the terminal measurement procedure in this embodiment. In step S902 of FIG. 13, eNB1 transmits an "RRC Connection Reconfiguration" message to the UE2. In step S903, UE2, according to "RRC Connection Reconfiguration" setting information of the terminal measurement indicated by (Measurement Configuration), perform measurements in a shared frequency. In step S903, UE2 transmits shows the measurement result of the shared frequency "(UE) Measurement Report" to the eNB1.
[0075]
　Further, in the present embodiment, the terminal measurement procedure for performing a second terminal measurements in shared frequency may include at least one of the example below (2a) ~ (2e).
(2a) measured between different frequencies (Inter-frequency measurement)
procedure;
; (2b) different radio access technology between the measurement (Inter-RAT measurement) procedure to (2c) second receiver (Second Receiver) of UE2 having the dual receiver arrangement ; used, the procedure for measuring the shared frequency set as an additional carrier
and; procedure to measure the set shared frequency as a secondary cell (2d) carrier aggregation (carrier aggregation (CA)) (or secondary carrier)
(2e ) terminal measurement procedure of MDT (Minimization of Drive Test).
[0076]
　Figure 14 is a conceptual diagram of the procedure (2a) using the inter-different-frequency measurement (Inter-frequency measurement) for the second terminal measurement in a shared frequency. Figure 14 shows the case shared frequency is TVWS. UE2 performs the measurement of the license band is a serving carrier or serving cell. Furthermore, UE2 performs measurement of TV band according to the instructions between different-frequency measurement (Inter-frequency measurement) by eNB1.
[0077]
　Between different-frequency measurement (Inter-frequency measurement) can be carried out according to the sequence diagram shown in FIG. 13. Specifically, "RRC Connection Reconfiguration" message in step S902 includes the measurement configuration information Inter-frequency measurement (Measurement Configuration ( MeasConfig)). Moreover, the measurement configuration information includes, for example, at least one of the following three.
Measurement items (eg RSRP, RSRQ, RSSI, or CQI);
- inter-frequency setting information (Measurement Gap Configuration (MeasGapConfig)) of the communication interruption period for measurement; and
setting information about and reporting (Report Configuration (ReportConfig) ).
[0078]
　Figure 15 is a conceptual diagram of the procedure (2c). Figure 15 also shows the case shared frequency is TVWS. UE2 performs the measurement of the license band is a serving carrier or serving cell. Furthermore, UE2 in accordance with the instruction by eNB1, receives TV band as an additional carrier with a second receiver, the measurement of the TV band.
[0079]
　Measurements of the shared frequency based on the procedure (2c) can also be carried out according to the sequence diagram shown in FIG. 13. Specifically, "RRC Connection Reconfiguration" message in step S902 includes measurement configuration information of the different frequency measurement (Inter-frequency measurement) (Measurement Configuration (MeasConfig)). Specific examples of the measurement configuration information, as described above. Here, UE2 are notified beforehand to have a dual receiver configuration to (to have other words second receiver) to eNB1. Therefore, eNB1 is aware that allows the terminal measurements in shared frequency UE2 by using a second receiver. In step S903, UE2 performs measurement of shared frequency as Intra-frequency or Inter-frequency measurement. Incidentally, eNB1 and the UE2 may measure the shared frequency as Inter-RAT measurement.
[0080]
　Figure 16 is a conceptual diagram of the procedure (2d) for measuring a shared frequency set as a secondary cell for carrier aggregation (CA) (or the secondary carrier). Figure 16 also shows the case shared frequency is TVWS. UE2 performs measurement of a license band is the primary cell of the carrier aggregation (CA) (or primary carrier). Furthermore, UE2 in accordance with the instruction by eNB1, set the cell (or carrier) of the TV band as a secondary cell for carrier aggregation (CA) (or secondary carrier), it receives a specific signal, perform terminal measurements in TV band. Incidentally, if the shared frequency includes a plurality of candidate frequencies, eNB1 may be set to a secondary cell one by one, it may be set a plurality of candidate frequencies at the same time as the plurality of secondary cell.
[0081]
　Measurement of shared frequency using carrier aggregation (CA) can also be carried out according to the sequence diagram shown in FIG. 13. Specifically, the "RRC Connection Reconfiguration" message in step S902, the setting information of a secondary cell of the carrier aggregation (CA) (or secondary carrier) (Secondary Cell Configuration (SCellConfig) ), and measurement configuration information (Measurement Configuration (MeasConfig ))including. In step S903, UE2 performs measurement of shared frequency as Intra-frequency or Inter-frequency measurement. Here, the secondary cell setting information (SCellConfig) includes a list of secondary cell (SCellToAddModList) which is for example added or modified. Secondary cell list (SCellToAddModList) include, for example, at least one of the following three.
Index secondary cell (SCellIndex);
- frequency information (Absolute Radio Frequency Channel Number (ARFCN )); and
- radio resource configuration (Radio Resource Config).
[0082]
　The measurement between different radio access technology to the second terminal measurements in shared frequency (Inter-RAT measurement) procedure using (2b) can also be carried out according to the sequence diagram shown in FIG. 13. Specifically, "RRC Connection Reconfiguration" message in step S902 includes the measurement configuration information Inter-RAT measurement (Measurement Configuration (MeasConfig)). Specific examples of the measurement configuration information Inter-RAT Measurement is similar to that of the Inter-frequency Measurement described above.
[0083]
　Further, in the present embodiment, eNB1 may transmit a specific signal described in the second embodiment. Specific signal transmitted from eNB1 in a shared frequency, without the data channel signal, the pilot signal, the reference signal, and may include at least one of the synchronizing signals. For example, a particular signal may include at least only one of the following (3a) ~ (3c).
(3a) cell common reference signal (Common Reference Signal
(CRS)); (3b) reference signal for CSI calculation (CSI Reference Signal (CSI-RS ); and
. (3c) synchronization signal (Synchronization Signal)
　further specific signal may include (3d) cells in a common system control information (Master information Block (MIB) or system information Block (SIB)).
[0084]
　Furthermore, the constraint on transmission power of a particular signal may be imposed. For example, a particular signal may be transmitted at lower transmission power than the downlink signal in the license band of the LTE system 100 (Licensed Band). Also, certain signals, the management system (eg GDB, SM) of the shared frequency may be transmitted by the upper limit value or less of the transmission power imposed by.
[0085]

　In this embodiment, the radio communication system 100 according to the third embodiment described above is an LTE system, it will be described in detail when the shared frequency is TVWS. That is, the present embodiment shows an example in which the frequency control unit 3 are integrally disposed with the radio station (ie eNB) 1.
[0086]
　Figure 17 shows a configuration example of a wireless network including a wireless communication system (ie LTE system) 100 according to this embodiment. Example of FIG. 17 includes two LTE systems 100A and 100B. LTE system 100A includes two eNB1A and 1B. eNB1A is, to operate the cell 11A, to communicate with UE2A attributable to cell 11A. eNB1B is to operate a cell 11B, to communicate with UE2B attributable to cell 11B. Operation management apparatus (OAM) 4A manages a plurality of radio stations 1 included in the LTE system 100A (including eNB1A and 1B).
[0087]
　Similarly, LTE system 100B includes two eNB1C and 1D. eNB1C is, to operate the cell 11C, to communicate with UE2C attributable to cell 11C. Similarly, ENB1D is to operate cell 11D, communicates with UE2D attributable to cell 11D. Operation management apparatus (OAM) 4B manages a plurality of radio stations 1 included in the LTE system 100B (including eNB1C and 1D).
[0088]
　Operation management apparatus (OAM) 4A and 4B communicate with the frequency management device (SM) 5, receives the shared frequency information from the frequency management device (SM) 5. Shared frequency information indicates the available shared frequency (ie at least one candidate frequency). Operation management apparatus (OAM) 4A and 4B may receive directly shared frequency information from the Geo-location Database (GDB) 6 without passing through the 5 frequency management device (SM). GDB6 manages the usage of licensed frequency band TV broadcast system 200 (ie TV band), to provide information of the secondary usable frequency band (eg TVWS).
[0089]
　Figure 18 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in the LTE system 100A according to this embodiment. Figure 18 shows the ENB1A, is similar to the well operation eNB1B eNB1A. Further, the LTE system 100B also may execute a procedure similar to the LTE system 100A shown in FIG. 18.
[0090]
　Processing in steps S101 ~ S104, S201, S301, and S303 ~ S306 in FIG. 18 may be the same as the processing in the steps of the same reference numerals shown in FIG. Step S801 and S802 in FIG. 18 is a specific example of the "acquired (step S302) of the candidate frequency information" shown in FIG. That is, in step S801, the operation management apparatus (OAM) 4A sends a request for the candidate frequency information GDB6. At step S802, the operation management apparatus (OAM) 4A receives notice of a candidate frequency information from GDB6. Candidate frequency information indicates at least one candidate frequency.
[0091]
　Step S803 and S804 of FIG. 18 shows a process for starting communications using the assigned frequency (ie TVWS). In step S803, ENB1A transmits the setting information of the allocated frequency to UE2A. In step S804, ENB1A communicates with UE2A in allocated frequency.
[0092]
　Procedure shown in FIG. 18 is merely one example. In a manner similar to that described with respect to FIG. 8, the timing of the operation management device obtains the candidate frequency information by the (OAM) 4A (S801 and S802) may be appropriately changed. Also, without transmitting eNB1 frequency allocation request (S301), the operation management apparatus (OAM) 4 may notify the candidate frequency spontaneously eNB1.
[0093]

　In this embodiment, the radio communication system 100 according to the fourth embodiment described above is an LTE system, will be described in detail when the shared frequency is TVWS. That is, the present embodiment shows an example in which the frequency control unit 3 are integrally disposed and the operation management apparatus (OAM) 4. Note that the configuration example of a wireless network including a LTE system 100 according to this embodiment may be the substantially the same as structure of the sixth embodiment shown in FIG. 17. However, the frequency control unit 3 is arranged in the radio station (ie eNB) the operation management apparatus rather than 1 (OAM) 4.
[0094]
　Figure 19 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in the LTE system 100A and 100B according to this embodiment. Figure 19 shows the ENB1A, is similar to the well operation eNB1B eNB1A. Further, the LTE system 100B also may execute a procedure similar to the LTE system 100A shown in FIG. 19. Note that the processing in step group shown in FIG. 19 may be the same as the processing in the steps of the same reference numerals shown in FIG. 10 or 18. Therefore, no detailed description of each step in FIG. 19.
[0095]
　Procedure shown in FIG. 19 is merely one example. In a manner similar to that described with respect to FIG. 10, for example, the timing of the operation management apparatus (OAM) 4 for the acquisition of candidate frequency information (S302) may be appropriately changed. Also, without transmitting eNB1 frequency allocation request (S301), the operation management apparatus (OAM) 4 may transmit the candidate frequency notification and terminal measurement report instructs the spontaneously eNB1.
[0096]

　The seventh embodiment described above may be modified as described below. In the seventh embodiment, the operation management apparatus (OAM) 4A and 4B of each operator example shows how to determine the allocated frequency among the candidate frequency (ie TVWS). However, the frequency management device frequency assignment of a plurality of operator networks (ie frequency management) (SM) 5 may be performed intensively.
[0097]
　Figure 20 is a sequence diagram showing a specific example of usage control procedure of the shared frequency in the LTE system 100A and 100B according to this embodiment. Figure 21 shows the eNB1A and 1C, also the operation of eNB1B and 1D are similar to eNB1A and 1C. As is apparent from a comparison of FIGS. 20 and 19, Figure 20 includes a step S901. At step S901, the frequency management device (SM) 5 receives secondary available TVWS information, that is, the candidate frequency information from GDB6.
[0098]
　Further, FIG. 20, instead of steps S801 and S802 shown FIG. 19, including the step S902 and S903. At step S902, the operation management apparatus (OAM) 4A and 4B, in response to reception of frequency allocation request (S301) from eNB1A and 1C, and transmits the frequency assignment request to frequency management device (SM) 5. Operation management apparatus (OAM) 4A and 4B, may be transferred to the frequency management device (SM) 5 frequency allocation request message from eNB1A and 1C. In step S903, the operation management apparatus (OAM) 4A and 4B receives a notification of the candidate frequency information from the frequency management device (SM) 5.
[0099]
　Further, FIG. 20, in place of step S505 shown FIG. 19, including the steps S904 ~ S906. At step S904, the operation management apparatus (OAM) 4A and 4B, transmits the terminal measurement report to the frequency management device (SM) 5. In step S905, the frequency management device (SM) 5 on the basis of the terminal measurement report, to determine the respective allocation frequency of eNB1A and 1C. In step S906, the frequency management device (SM) 5 transmits respectively a notification indicating the allocation frequency of eNB1A and 1C to the management device (OAM) 4A and 4B.
[0100]
　Furthermore, FIG. 20, includes a step S907 in place of step S507 shown FIG. In step S907, the frequency management device (SM) 5 is to reflect the allocation result of the candidate frequencies to each of eNB1A and 1C, and updates the information of the candidate frequency.
[0101]
　Procedure shown in FIG. 20 is merely one example. For example, the timing of the acquisition (S901) of a candidate frequency information from GDB6 by frequency management device (SM) 5 may be appropriately changed. Also, without transmitting eNB1 frequency allocation request (S301), the operation management apparatus (OAM) 4A and 4B may request candidate frequency spontaneously frequency management device (SM) 5.
[0102]
　As described in the present embodiment, since the frequency management device (SM) network node (or device) such as a 5, the frequency allocations for a plurality of operator networks (or more operator system), between operators can keep fairness, it is possible to select the optimal operator network (or operator system) as an allocation destination of the shared frequency.
[0103]
　Note that in the seventh and eighth embodiments assuming a LTE system, was used as an example case of using the TVWS in LTE system. However, embodiments of the seventh and eighth, there is no primary system, such as a TV broadcasting system 200, a plurality of systems can also be applied to a case of sharing the frequency. Further, the plurality of systems, may be a plurality of LTE system may be an LTE system and another system.
[0104]

　processing is performed by the measurement control unit 10 described in the first to eighth embodiments, the measurement unit 20, and the frequency control unit 3 (or 3A ~ 3D), Application Specific Integrated Circuit (ASIC) it may be implemented using a semiconductor processing apparatus including a. Further, these processes may be realized by executing a program on a computer system that includes at least one processor (eg a microprocessor, MPU, Digital Signal Processor (DSP )). Specifically, first, the measurement control unit 10 shown in the eighth embodiment, the measurement unit 20, or one or more programs including instructions for causing algorithms for frequency control unit 3 in the computer system was created, it may be supplied to the program in the computer.
[0105]
　This program is stored using a non-transitory computer readable media of various types (non-transitory computer readable medium), it can be supplied to the computer. Non-transitory computer readable media include with various types of entities (tangible storage medium). Examples of non-transitory computer readable media include magnetic storage media (such as floppy disks, magnetic tape, hard disk drive), magneto-optical recording medium (e.g., magneto-optical disk), Compact Disc Read Only Memory (CD-ROM), CD- R, including CD-R / W, a semiconductor memory (e.g., a mask ROM, Programmable ROM (PROM), Erasable PROM (EPROM), flash ROM, Random Access memory (RAM)). The program may be provided to a computer using a temporary computer readable media of various types (transitory computer readable medium). Examples of transitory computer readable media include electric signals, optical signals, and electromagnetic waves. Transitory computer readable media, wired communication path such as electrical wires and optical fibers, or via a wireless communication path can provide the program to a computer.
[0106]

　The following describes a reference embodiment (reference embodiment). Technical ideas grasped from the reference embodiment described below, it contributes to the resolution of different problems and technical idea grasped from the first to the eighth embodiments described above, is understood from the first to eighth embodiments and that the spirit can be implemented independently.
[0107]
　In an embodiment of the second to eighth, for the purpose of determining whether to use the shared frequency for radio station 1 (or, whether or not to permit the use of shared frequency by the wireless station 1), the radio station while transmitting a specific signal in the shared frequency (or candidate frequencies) from 1, the wireless terminal 2 has been described a process of measuring a shared frequency. The process, as described in the second embodiment, as compared with the mere sensing, the wireless terminal 2 can receive shared frequency signal from the radio station 1 (ie specific signal) in sufficient quality, in other words the wireless communication the effect of the system 100 can guarantee, can effectively utilize the shared frequency.
[0108]
　In order to obtain the effects, a radio access technology applied to wireless communication system 100 (eg LTE, UMTS, CDMA2000, GSM, WiMAX) pursuant (or defined) is first to execute a terminal measurements are not require that by utilizing the terminal measurement procedure executes the second terminal measurement in a shared frequency. In other words, have been described in the embodiments of the second to eighth "while transmitting a specific signal in the shared frequency from the radio station 1, processing of the wireless terminal 2 performs a second terminal measurements in shared frequency" is first and the effect as described above even when the second terminal measurements using different terminal measurement procedure.
[0109]
　Reference forms, including "while transmitting a specific signal in the shared frequency from the radio station 1, the wireless terminal 2 is processing for the second terminal measurements in shared frequency", for example, it can be described as following appendices .
[0110]
(Supplementary Note 1)
　A wireless communication system comprising at least one wireless terminal communicating with the radio station and the radio station,
　the at least one wireless terminal, first at the first frequency licensed to the wireless communication system and executes the terminal measurement, the work to perform a second terminal measurements at a second frequency that is shared by a plurality of radio system comprising a radio communication system,
　the radio station, the second terminal measurement when it is made operative to transmit a specific signal in the common frequency,
a wireless communication system.
(Supplementary Note 2)
　The specific signal does not include a data channel signal for transmitting user data, the radio communication system according to Appendix 1.
(Supplementary Note 3)
　The specific signal is the pilot signal, the reference signal, and includes at least one of synchronization signals, the radio communication system according to Appendix 2.
(Supplementary Note 4)
　The specific signal, wherein at a lower transmission power than the downlink signal in the licensed frequency wireless communication system transmitted from the radio station, according to any one of Appendices 1 to 3 radio Communications system.
(Supplementary Note 5)
　The specific signal is the transmitted from the radio station by the upper limit value or less of the transmission power imposed by the management system of the shared frequency, the wireless communication system according to any one of Appendices 1-4.
(Note 6)
　Said specific signal, wherein the radio station is transmitted in order to determine the availability of the shared frequency in a communication between at least one wireless terminal, a wireless communication system according to any one of Appendices 1 to 5 .
(Supplementary Note 7)
　The specific signal is the temporary operation period for determining the availability of said shared frequency in a communication between the said radio station at least one wireless terminal, the preparation period, and at least one test period is transmitted, the radio communication system according to any one of appendices 1-6.
(Supplementary Note 8)
　based on a result of the second terminal measurement, further comprising a control unit operable to control the use of the shared frequency in a communication between the said radio station at least one wireless terminal, Appendix 1 the wireless communication system according to any one of 1-7.
[0111]
　Moreover, embodiments and Reference Embodiment described above are only examples for the application of technical ideas obtained by the present inventor. In other words, the technical idea is not limited to the embodiments and Reference Embodiment described above, it is needless to say various modifications are possible.
[0112]
　This application claims priority based on Japanese Patent Application No. 2012-102336, filed on April 27, 2012, the entire disclosure of which is incorporated herein.
DESCRIPTION OF SYMBOLS
[0113]
1,1A, 1B, 1C, 1D radio station
2,2A, 2B, 2C, 2D wireless terminal
3 frequency control unit
4, 4A, 4B operation management apparatus (Operation Administration and Maintenance
(OAM)) 5 frequency management device (Spectrum Manager
(SM)) 6 Geo-location Database
(GDB) 10 measurement control unit
11,11A, 11B, 11C, 11D cell
20 measuring section
100, 100A, 100B wireless communication system
200 TV broadcast system

WE CLAIM

It is used in a wireless communication system, a wireless terminal for communicating with a radio station,
　by using a terminal measurement procedure for performing a first terminal measurements corresponding to the radio access technology to be applied to the wireless communication system includes a measurement unit operable to perform a second terminal measurements in shared frequency shared by a plurality of radio systems including the wireless communication system,
the wireless terminal.
[Requested item 2]
　Said second terminal measurement, wherein is performed to determine whether to use the shared frequency for communication between the radio station the radio terminal, the radio terminal according to claim 1.
[Requested item 3]
　The second result of the terminal measurement is used for controlling the use of the shared frequency in a communication between the said radio station radio terminal, the radio terminal according to claim 1 or 2.
[Requested item 4]
　The terminal measurement procedure includes a procedure for between different-frequency measurement (inter-frequency measurement),
　the second terminal measurement, the implemented as measured between different frequencies,
one of the claims 1 to 3, 1 wireless terminal according to claim.
[Requested item 5]
　The terminal measurement procedure includes a procedure for measuring the secondary cell while the primary cell and secondary cell is set by the radio station,
　the second terminal measurement is performed as a terminal measurements in the secondary cell It is the,
wireless terminal according to any one of claims 1-3.
[Requested item 6]
　It said second terminal measurement comprises a step of receiving a specific signal transmitted in the shared frequency from the radio station, the radio terminal according to any one of claims 1 to 5.
[Requested item 7]
　The specific signal includes a pilot signal, the reference signal, and at least one of synchronization signals, the wireless terminal according to claim 6.
[Requested item 8]
　The specific signal is the transmitted upper limit value or less of the transmission power imposed by the management system of the shared frequency from the radio station, the radio terminal according to claim 6 or 7.
[Requested item 9]
　The specific signal is the transmitted as the radio station until a predetermined period or a predetermined timing to the use of said shared frequency in a communication between the wireless terminal, the wireless terminal according to any one of claims 6-8.
[Requested item 10]
　Wherein the predetermined period is tentatively operation period for using the shared frequency for communication between the said radio station radio terminal, preparation period, and at least one test period, according to claim 9 radio terminal.
[Requested item 11]
　Wherein the predetermined timing is the time to determine the use of the shared frequency, and time, at least one of updating the use of the shared frequency, the wireless terminal according to claim 9.
[Requested item 12]
　The terminal measuring procedure, including signaling between the radio station and the radio terminal, the radio terminal according to any one of claims 1 to 11.
[Requested item 13]
　The signaling includes the wireless terminal receives a terminal measurement instruction from the radio station, the radio terminal according to claim 12.
[Requested item 14]
　The terminal measurement instruction includes designation of frequencies to be measured, and setting information of the reference signal transmitted from the radio station, at least one of a wireless terminal according to claim 13.
[Requested item 15]
　The signaling includes transmitting a measurement report to the radio station from the radio terminal, the radio terminal according to any one of claims 12-14.
[Requested item 16]
　The measurement report received signal power in the shared frequency, received power of the reference signal of the wireless communication system (Reference Signal Received Power (RSRP)), the reception quality of a reference signal in a radio communication system (Reference Signal Received Quality (RSRQ )), channel quality indicator of the wireless communication system (channel quality indicator (CQI)), the priority between the plurality of candidate frequencies in the shared frequency, information representing the preferred frequency among the candidate frequency in the shared frequency, and location information of the wireless terminal comprises at least one of a wireless terminal according to claim 15.
[Requested item 17]
　It said first and second terminal measurement comprises the wireless terminal measures the radio characteristics, the wireless terminal according to any one of claims 1 to 16.
[Requested item 18]
　The shared frequency is the primary system preferentially available, the is secondary use by the wireless communication system, a radio terminal according to any one of claims 1 to 17.
[Requested item 19]
　The shared frequency is TV white space, wireless terminal according to any one of claims 1 to 18.
[Requested item 20]
　Is used in a wireless communication system, a radio station which communicates with at least one wireless terminal,
　the terminal measurement procedure for controlling the first terminal measurements corresponding to the radio access technology to be applied to the wireless communication system using includes a measurement control unit operable to control the second terminal measurements in shared frequency shared by a plurality of radio systems including the wireless communication system,
a radio station.
[Requested item 21]
　Said second terminal measurement, wherein the radio station is performed to determine whether to use the shared frequency for communication between at least one wireless terminal, of claim 20 radio bureau
[Requested item 22]
　The result of the second terminal measurement is used for controlling the use of the shared frequency in a communication between the said radio station at least one radio terminal, the radio station according to claim 20 or 21.
[Requested item 23]
　The terminal measurement procedure includes a procedure for between different-frequency measurement (inter-frequency measurement),
　the second terminal measurement, the implemented as measured between different frequencies,
one of claims 20-22 1 radio station according to claim.
[Requested item 24]
　The terminal measurement procedure includes a procedure for measuring the secondary cell while setting the primary cell and secondary cell to the radio terminal,
　said second terminal measurement is performed as a terminal measurements in the secondary cell is the,
the radio station according to any one of claims 20-22.
[Requested item 25]
　Measurement control unit, when the second terminal measurement is performed, and controls to transmit a specific signal in the shared frequency from the radio station, the radio station according to any one of claims 20-24.
[Requested item 26]
　The specific signal includes a pilot signal, the reference signal, and at least one of synchronization signals, the radio station according to claim 25.
[Requested item 27]
　The specific signal is the transmitted upper limit value or less of the transmission power imposed by the management system of the shared frequency from the radio station, the radio station according to claim 25 or 26.
[Requested item 28]
　The specific signal is the transmitted as the radio station until a predetermined period or a predetermined timing to the use of said shared frequency in a communication between the wireless terminal, the radio station according to any one of claims 25-27.
[Requested item 29]
　The predetermined period comprises a provisional operation period for using the shared frequency for communication between the said radio station at least one wireless terminal, the preparation period, and at least one of the test period, according to claim 28 of the radio station.
[Requested item 30]
　Wherein the predetermined timing is the time to determine the use of the shared frequency, and time, at least one of updating the use of the shared frequency, the radio station according to claim 28.
[Requested item 31]
　The terminal measurement procedure, comprising said signaling between the radio station and the at least one radio terminal, the radio station according to any one of claims 20-30.
[Requested item 32]
　The signaling includes transmitting a terminal measurement instruction to said at least one wireless terminal from the radio station, the radio station according to claim 31.
[Requested item 33]
　The terminal measurement instruction includes designation of frequencies to be measured, and setting information of the reference signal transmitted from the radio station, at least one of a radio station according to claim 32.
[Requested item 34]
　The signaling includes the radio station receives a measurement report from the at least one radio terminal, the radio station according to any one of claims 31 to 33.
[Requested item 35]
　The measurement report received signal power in the shared frequency, received power of the reference signal of the wireless communication system (Reference Signal Received Power (RSRP)), the reception quality of a reference signal in a radio communication system (Reference Signal Received Quality (RSRQ )), indicating the priority, the preferred frequency among the candidate frequency in the shared frequency between the radio channel quality indicator of a communication system (channel quality indicator (CQI)), a plurality of candidate frequencies included in the shared frequency information, and position information of the wireless terminal, at least one of a radio station according to claim 34.
[Requested item 36]
　Said first and second terminal measurement, the includes at least one wireless terminal measures the radio characteristics, the radio station according to any one of claims 20 to 35.
[Requested item 37]
　Based on the results of the second terminal measurement, further comprising a frequency control unit operable to control the use of the shared frequency in a communication between the said radio station at least one wireless terminal, according to claim 20-36 radio station according to any one of.
[Requested item 38]
　Wherein the frequency control unit is operative to determine a frequency used in the radio station from at least one candidate frequency comprises the shared frequency, the radio station according to claim 37.
[Requested item 39]
　Wherein the at least one candidate frequency, said supplied to the radio station from the operation management apparatus for managing a radio station, the radio station according to claim 38.
[Requested item 40]
　Together it operates to transmit the results of the second terminal measurement operation management device that manages the radio station, information indicating the frequency assigned to the radio station for communication with the at least one radio terminal further comprising a frequency control unit operable to receive the radio station according to any one of claims 20-36.
[Requested item 41]
　A wireless communication system comprising at least one wireless terminal communicating with the radio station and the radio station,
　the at least one wireless terminal, a first terminal measurements corresponding to the radio access technology to be applied to the wireless communication system using the terminal measurement procedure for performing operative to perform a second terminal measurements in shared frequency shared by a plurality of radio systems including the wireless communication system,
a wireless communication system.
[Requested item 42]
　The radio station, the utilizing terminal measurement procedure operates to control the second terminal measurement in the shared frequency, the wireless communication system of claim 41.
[Requested item 43]
　Said second terminal measurement, wherein the radio station the is performed to determine whether to use the shared frequency for communication between at least one wireless terminal, according to claim 41 or 42 of the wireless communication system.
[Requested item 44]
　The terminal measurement procedure includes a procedure for between different-frequency measurement (inter-frequency measurement),
　the second terminal measurement, the implemented as measured between different frequencies,
one of claims 41 to 43 1 the wireless communication system according to claim.
[Requested item 45]
　The terminal measurement procedure includes a procedure for measuring the secondary cell while by the radio station is a primary cell and a secondary cell is set to the wireless terminal,
　said second terminal measurement, in the secondary cell It is implemented as a terminal measurement,
wireless communication system according to any one of claims 41 to 44.
[Requested item 46]
　The radio station further, when the second terminal measurement is made operative to transmit a specific signal in the common frequency, the radio communication system according to any one of claims 41-45.
[Requested item 47]
　The specific signal includes a pilot signal, the reference signal, and at least one of synchronization signals, the radio communication system according to claim 46.
[Requested item 48]
　The specific signal is the transmitted upper limit value or less of the transmission power imposed by the management system of the shared frequency from the radio station, the radio communication system according to claim 46 or 47.
[Requested item 49]
　The specific signal is the transmitted as the radio station until a predetermined period or a predetermined timing to the use of said shared frequency in a communication between the wireless terminal, a wireless communication system according to any one of claims 46-48.
[Requested item 50]
　Wherein the predetermined period is tentatively operation period for using the shared frequency for communication between the said radio station at least one wireless terminal, the preparation period, and at least one of the test period, to claim 49 the wireless communication system according.
[Requested item 51]
　Wherein the predetermined timing is the time to determine the use of the shared frequency, and time, at least one of updating the use of the shared frequency, the wireless communication system of claim 49.
[Requested item 52]
　Based on the results of the second terminal measurement, further comprising a controller operable to control the use of the shared frequency in a communication between the wireless station at least one wireless terminal, of claim 41-51 the wireless communication system according to any one.
[Requested item 53]
　Wherein the control unit is at least operable to determine a frequency used in one of the radio station from the candidate frequencies, the wireless communication system of claim 52 including the shared frequency.
[Requested item 54]
　Wherein, the wireless communication system of claim 53 disposed in the radio station.
[Requested item 55]
　Wherein the control unit, a plurality of operable to determine a radio station to assign the shared frequency from among the radio stations, the radio communication system of claim 52 comprising the radio station.
[Requested item 56]
　Wherein the control unit, the are arranged in the operation management apparatus for managing a radio station, a radio communication system according to claim 55.
[Requested item 57]
　Wherein the control unit is configured by the wireless communication system is arranged to frequency management unit for managing frequency usage, wireless communication system according to claim 55.
[Requested item 58]
　Is used in a wireless communication system, a method implemented in a wireless terminal for communicating with the radio station,
　the terminal measures for performing the first terminal measurements corresponding to the radio access technology to be applied to the wireless communication system using the procedure comprises performing a second terminal measurements in shared frequency shared by a plurality of radio systems including the wireless communication system,
method.
[Requested item 59]
　It is used in a wireless communication system, a method implemented in a radio station which communicates with at least one wireless terminal,
　for controlling the first terminal measurements corresponding to the radio access technology to be applied to the wireless communication system using the terminal measurement procedure comprises controlling the second terminal measurements in shared frequency shared by a plurality of radio systems including the wireless communication system,
method.