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1. (WO2016165624) TERMINAL SIDE AND BASE STATION SIDE DEVICE, TERMINAL DEVICE, BASE STATION, AND WIRELESS COMMUNICATION METHOD

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Instructions
Title: the terminal side, the base station side device, a terminal device, wireless communication method and a base station
FIELD
[0001]
The present disclosure relates generally to the field of wireless communications. In particular, to an apparatus-side terminal in a wireless communication system, a terminal apparatus, base station apparatus side, the base station, and radio communication method used in them.
Background technique
[0002]
User demand for high-speed data transmission of the growing, LTE (Long Term Evolution) wireless transmission technology to become one of the most competitive. User Equipment (UE) to access the LTE cell search must go through the network, the cell system information acquisition procedure, the random access and the like. The main purpose of cell search are: (1) obtaining a cell with a frequency and symbol synchronization; (2) frame timing acquisition system, i.e., the start position of a frame in a downlink; (3) determining a physical layer cell identity (PCI). UE not only needs to perform cell search at startup. To support mobility, the UE will keep the neighbor cell search, synchronization, and estimate reception quality of the cell signal, to decide whether a handover or cell reselection.
[0003]
With the growing demand for data transmission, increased bandwidth and spectrum efficiency has become the key to improving overall system performance. In this context, the use of unlicensed bands are valued by more and more operators, and consider it as a supplement to existing LTE licensed bands to improve the quality of service users.
[0004]
Since cell unlicensed frequency band coexist with other communication systems, spectrum resources used in common, to some extent, the signal of the cell may be due to the use of other high-priority system (such as radar) must be avoidance of, or with other systems (such as WiFi) negotiated only use a fixed time period. If the cell search and synchronization too time-consuming, would be detrimental to the UE initial access and a cell reselection, handover, and thus limit the use of unlicensed band cell. Thus, the UE is required to quickly perform unauthorized frequency cell search and synchronization.
[0005]
SUMMARY
[0006]
It gives a brief summary of the present disclosure hereinafter, in order to provide a basic understanding of some aspects of the present disclosure. It should be understood that this summary is not an exhaustive overview of the disclosure. It is not intended to identify key or critical elements of the disclosure are not intended to limit the scope of the present disclosure. Its sole purpose is to present some concepts in a simplified form, as a prelude to the more detailed description that is discussed later.
[0007]
According to one aspect of the present disclosure, there is provided an apparatus for a wireless communication system terminal side. The apparatus comprising: a search unit configured synchronization signal corresponding to a sequence on the target cell search employing target frequency range to be searched; and a synchronization unit configured to synchronize with the detected based search unit synchronization signal, so that device synchronization to a target cell. Wherein, when the target frequency range belongs to the first frequency range, the search unit using the synchronization signal sequence centralized synchronization signal a first sequence of sub-set of the target cell search, wherein the first subset is a proper subset of the set of synchronization signal sequence set.
[0008]
According to another aspect of the present disclosure, there is provided a wireless communication method used by the terminal apparatus side. The method comprises: synchronous signal sequence and the target frequency range to be searched corresponding to the target cell search; search and synchronization based on synchronization signals, so that the synchronization device to a target cell. Wherein, when the target frequency range belongs to the first frequency range, using the synchronization signal sequence centralized synchronization signal a first sequence of sub-set of the target cell search, wherein the first subset is a proper subset of the set of synchronization signal sequence.
[0009]
According to another aspect of the present disclosure, there is provided a base station side device in a wireless communication system. The apparatus comprises: identifying the group determination unit configured to determine the physical-layer cell identity group of target cells, wherein the physical layer cell identity group and the frequency range of the target cell concerned; secondary synchronization signal sequence generating unit configured based on the physical layer the cell identification sequence groups generated secondary synchronization signal for the secondary synchronization signal of the target cell. Wherein the frequency range in a case where the target cell belongs to a first frequency range, a physical-layer cell identity group derived from a set of physical layer cell identity group in the first subset, proper subset of the first subset of the physical layer cell identifier of the group set set.
[0010]
According to another aspect of the present disclosure, there is provided a wireless communication method used in a base station apparatus side. The method comprising: determining a target cell's physical layer cell identity group, wherein the physical-layer cell identity group and the relevant frequency range of the target cell; SSS sequence of secondary synchronization signal based on the physical layer of the target cell generates a cell identity group. Wherein, in a case where the frequency range of the target cell belongs to a first frequency range, a physical-layer cell identity group only from a physical layer cell identity group set in the first subset, the first subset of physical layer cell identifier of the group set proper subset.
[0011]
According to another aspect of the present disclosure, there is provided a base station capable of communicating with the wireless terminal device on a first carrier. The apparatus comprises: a communication unit configured to receive a synchronization signal on a second carrier different from the carrier emitted by the first base station; and a synchronization unit, configured by the synchronization signal and the secondary synchronization signal SSS sequence a first subset of the set of sequences determined matching the secondary synchronization signal, wherein the first subset is a proper subset of the set of secondary synchronization signal sequences.
[0012]
According to another aspect of the present disclosure, there is provided a base station capable of wireless communication system, a wireless communication terminal in a communication on the first carrier. The base station includes: a communication unit configured to transmit a secondary synchronization signal including a synchronization signal on a second carrier different from the first carrier. Wherein the selected subset of the first secondary subset of the set of synchronization signal sequence, a first subset of the set of secondary synchronization signal sequence secondary synchronization signal.
[0013]
According to aspects of the present disclosure, the reduced number of sync signal sequences matching a cell search process, greatly reducing the time synchronized to the UE used by the target cell.
BRIEF DESCRIPTION
[0014]
DESCRIPTION OF DRAWINGS Referring to the embodiment of the present disclosure, will be more readily understood from the foregoing the present disclosure and other objects, features and advantages. In the drawings, the same or corresponding technical features or components will use the same or corresponding reference numerals. In the drawings are not necessarily drawn to scale the sizes and relative positions of the units.
[0015]
FIG. 1 is a block diagram illustrating a wireless communication device system embodiment of the present disclosure in embodiments according to the terminal side.
[0016]
FIG 2 is a block diagram showing a terminal side apparatus according to the present disclosure illustrating another embodiment of a wireless communication system.
[0017]
FIG 3 is a flowchart illustrating a method of wireless communication by the terminal-side apparatus disclosed embodiments of the present embodiment is used.
[0018]
FIG 4 is a block diagram illustrating a base station apparatus side wireless communication system in the disclosed embodiments of the present embodiment according to the.
[0019]
FIG 5 is a block diagram illustrating a base station apparatus side wireless communication system in the disclosed embodiments of the present embodiment according to the.
[0020]
FIG 6 is a flowchart illustrating a wireless communication method used in a base station apparatus side in the present embodiment of the disclosed embodiments.
[0021]
FIG 7 is a block diagram illustrating a wireless terminal device according to the present embodiment of the disclosed embodiments.
[0022]
FIG 8 is a timing chart illustrating a synchronization process according to the present embodiment of the disclosed embodiment of the wireless communication system.
[0023]
9 is a timing diagram illustrating the synchronization process of a wireless communication system according to another embodiment of the present disclosure.
[0024]
FIG 10 is a block diagram illustrating an exemplary configuration of a computer can be achieved according to the present invention.
[0025]
FIG 11 is a block diagram of a first exemplary embodiment schematically illustrating the disclosed technology may be applied eNB configuration.
[0026]
FIG 12 is a block diagram of a second exemplary embodiment illustrating a schematic configuration of the disclosed technology may be applied eNB.
[0027]
FIG 13 is a diagram illustrating the application of the disclosed technology can be a smart phone is a block diagram showing a schematic configuration.
detailed description
[0028]
Exemplary embodiments of the present disclosure will be described below in conjunction with the accompanying drawings. For clarity and brevity, described in the specification are not all features of an actual embodiment. However, it should be understood that the specific lot must be made in the development of any such actual embodiment of the process to decide the embodiment, in order to achieve specific goals developers. For example, in line with those constraints associated with the systems and services, and these restrictions may be subject to change with different embodiments. In addition, it should be understood that, although the development work can be very complex and time-consuming, but the benefit of this disclosure to those skilled in the, this development is only a routine task.
[0029]
Here, it is should also be noted that: in order to avoid unnecessarily obscure the details of the present disclosure, is shown in the drawings only be omitted according to the present disclosure means the structure closely related to the program and / or processing steps, additional details of this little public relations.
[0030]
In order to support cell search, LTE downlink synchronization defines two kinds of signals: three primary synchronization signal (PSS) 168 and a secondary synchronization signal (SSS). Thus the combination of a primary synchronization signal and LTE secondary synchronization signals has defined 504 different PCI, PCI and each corresponding to a specific downlink reference signal sequence. 168 secondary synchronization signal 168 are identified as a cell identity group, three primary synchronization signals are identified as the three cell identity. Primary synchronization signal and secondary synchronization signals together determine the PCI of a cell. When the base station determines a cell group identifier and a cell identifier (PCI = 3 * + cells identifies a cell group identity), it determines the transmission sequence of primary synchronization signal and secondary synchronization signals transmitted. The UE searches for these signals, the signals are demodulated according to all related possible combinations, to determine a cell group identifier and a cell identifier used by the base station.
[0031]
In order to demodulate the UE PCI of a cell, the need to individually match the primary synchronization signals and the possible secondary synchronization signal. In order to increase the speed of the UE and the cell synchronization, the access time is shortened, the present disclosure proposes a new technical solution to a specific target cell by using proper subset of the sequence synchronous signal sync signal sequence in a predetermined set of existing communication protocols search, the UE may shorten access time. For example, it may be determined according to the particular subset of the target frequency range to be searched.
[0032]
FIG. 1 is a block diagram illustrating a wireless communication system 100 of the apparatus disclosed in embodiments of the present embodiment according to the terminal side. Apparatus 100, for example but not limited to devices such as a mobile phone terminal, notebook computers, and in such a mobile terminal device, or the like binding member (such as a chip) or a mobile terminal device such use.
[0033]
Apparatus 100 includes a search unit 101 and the synchronization unit 102. Searching unit 101 is configured to search the target cell is a synchronous signal sequence and the target frequency range corresponding to be searched. For example, in the case where the target frequency range belongs to the first frequency range, the search unit 101 may employ a set of synchronization signal sequence with a first set of synchronization signal sequence corresponding to a first frequency sub-range of the search target cell. Here, the first subset is a proper subset of the set of synchronization signal sequence. Here, a set of synchronization signal sequences such as but not the synchronization signal sequence of a predetermined set of existing communication protocols. Correspondence between the target frequency range of the first subset may be set in advance, and can be preset in the UE (e.g., UE boot file is written), or notified to the UE by the base station. In one embodiment, the apparatus 100 may further include a determination unit (not shown) for determining whether a target frequency range of the first frequency range.
[0034]
In one embodiment, the first frequency range may be a range of an unlicensed frequency radio communication system, the target cell to be searched for the unlicensed spectrum access cell. In this embodiment, the synchronization signal sequence set e.g. but not limited to the use of the synchronization signal sequences utilizing authorized carrier communication frequency band on the radio communication system of the communication device set. Since the wireless communication system where the device 100 typically only unauthorized use of band resources opportunistically, wherein the idle resources may be fleeting, and thus the present invention is particularly suitable for cells operating on unlicensed bands were found shorten the cell discovery to improve the effect of time and resource utilization. Alternatively, for example, it may be further unlicensed frequency band into multiple sub-frequency range, for example, WiFi / frequency sub-range radar coexist and general sub unlicensed frequency range. The first frequency range may correspond to one of a plurality of sub-frequency range, for example, a synchronization signal sequence the entire set of synchronization signal sequence on the unlicensed frequency bands set for fast search using a synchronization signal sequence comprising a subset thereof. Access time on the sub-frequency ranges are different systems coexist more stringent requirements than the average sub-frequency range, in this example, there may be more than ordinary non-synchronization signal sequence different systems coexist sub-frequency range corresponding to proper subset of the set small child authorized frequency range, thus further accelerate the discovery process cell.
[0035]
The synchronization unit 102 is configured to detect a synchronization signal based on the synchronization search unit 101, so that the synchronization device 100 to a target cell. Subset of the use, the number of times the matching UE may perform cell search process of the target will be significantly reduced, thereby shortening the synchronization time of the UE and the target cell.
[0036]
Hereinafter, for convenience of description, in conjunction with an access way of example only unlicensed frequency cell according to the present disclosure will be described apparatus and methods. However, those skilled in the art will be understood: according to the present disclosure is also applicable to apparatus and method for access to any other cell need to speed up the synchronization process, such as a licensed band frequency range, the effect can be obtained in the same synchronization time shortened. For example, the small cells with dense deployment scenarios, the fast-moving UE also needs quick access to a small cell. Accordingly, the frequency range may be a small cell as a first frequency range, thus speeding up the synchronization process.
[0037]
In the current definition of a synchronization signal, since there are three primary synchronization signal may be matched to the primary synchronization signal up to 3 times. Since the secondary synchronization signal is located in a different frame sequences using different secondary synchronization signal each have 168 possibilities, a secondary synchronization signal is matched up to 168 times. Thus, it is seen: in the program match the synchronization signal by using current subset as synchronization signal sequence to be candidates, the secondary synchronization signal having a larger room for optimization. Thus, in one embodiment, the above-described synchronization signal sequence may be a sequence of secondary synchronization signal. Searching unit 101 may be configured to decode the secondary synchronization signal of the target cell employing the frequency band e.g. unauthorized target frequency range corresponding to a sequence of secondary synchronization signal.
[0038]
About the use of unauthorized use of the common frequency band, the current industry generally reached with the aid of the licensed band is an unlicensed frequency band, i.e., using the access authorization with the secondary carrier aggregation in the LTE (LAA-LTE). For LAA-LTE cell, in one embodiment, it may be defined using only a subset of the existing standards which secondary synchronization signal. For example, using the 56 base sequence in the base sequence 168 only. UE respectively thereby reducing the number of secondary synchronization signal autocorrelation sequence (match), thus greatly reducing the synchronization time.
[0039]
In one embodiment, the apparatus 100 may further include a communication interface (not shown). The communication interface may be configured to obtain a target cell search command by the first cell on the licensed band, and information indicating the first subset. For example, the communication interface may receive signaling comprises a command to search a target cell and information indicating the first subset of the first cell in the licensed band. The signaling may be, for example, broadcast signaling, RRC signaling may be.
[0040]
In at LAA-LTE scene, set as a synchronization signal sequence to the target cell search and unlicensed frequency band corresponding to the real child by using a secondary synchronization signal sequence set for example, may for example be divided secondary synchronization signal according to the value of PCI die 6 base sequence (as in the existing standard 168), the secondary synchronization signal sequence into subsets used is 6, alternatively the first subset, and sets the appropriate number assigned to each sub, a first subset instructions. In a further example, the subsets may be divided according to a sequence of the group ID. For example, the base sequence of secondary synchronization signal is divided into three subsets.
[0041]
In the example scenario above LAA-LTE, the access device 100 to the target cell, the communication interface device 100 may also be configured to acquire the target cell indicated by the synchronization signal sequence associated with the update. In the example, the carrier need not authorized auxiliary, using unlicensed frequency communication scenario, a communication interface device 100 may also access the target cell after acquiring the updated target cell indicated by the relevant synchronization signal sequence in the apparatus 100, in other words, the band can acquire the updated instructions on synchronization signal sequence in this example by unauthorized.
[0042]
FIG 2 is a block diagram illustrating the structure of the terminal-side apparatus 200 of the present disclosure further embodiment of a wireless communication system in accordance with. Apparatus 200 may include a search unit 201, a synchronization unit 202, detection unit 203 and a notification unit 204. Search unit 201 and the synchronization unit 202 has, in connection with FIG. 1 search unit 101 and the synchronization unit is described in the same function and structure 102 described herein is not redundant. Examples of other embodiments and the following embodiments, the same terms in the present embodiment (such as "first subset", "first frequency range", etc.) denote the same meaning as the foregoing embodiment embodiment.
[0043]
Detection unit 203 can detect whether a first subset of the use of interference caused in the reference signal received by the apparatus over a first frequency range 200 is too large. For example and without limitation, may be determined by detecting whether an excessive interference reference signal received quality (RSRQ) signals. Such as, but not limited to, when there is strong interference by detecting RSRQ determining, strong interference may be further determined duration, the time when it exceeds a predetermined threshold value, since it may be determined using a first subset of the device 200 by the result in a first frequency interference signal received on the reference range is too large. Under excessive interference is detected, the notification unit 204 notifies the detection result may base its serving cell or the target cell. Note that in some examples, the current serving cell apparatus 200 (e.g., serving cell on the licensed band) and the target cell in the unlicensed band is co base station, in other examples, the serving cell and the target cell may be different base station management entity, the notification unit 204 may notify the detection result to the serving cell base station, and then transmitted by the serving cell base station by X2 signaling to the base station of the target cell, and in some examples, the device 200 may directly access the target cell after We report the detection result to the base station of the target cell.
[0044]
Synchronization signal sequence set may include a plurality of the first subset cell search frequency range. Searching unit 201 may detect a base station serving cell / target cell response indicating the second subset consisting of the interference notification unit 204 issues a notification of excessive reselection from a proper subset of the plurality, and a synchronization retransmitted by the base station of the target cell signal. Needless to say, a second subset of the first re-select different subsets. The search unit 201 may decode the synchronization signal according to an instruction retransmitted using a second subset of the second subset.
[0045]
Alternatively, the target cell may be a base station in response to the interference notification unit 204 issues a notice of an excessive concentration reselect additional synchronization signal from the first sub-sequence, rather than re-selected subsets.
[0046]
LAA-LTE in the scene, since the LAA-LTE target cell and a macro cell are usually deployed in the small cell and different frequency bands, and therefore, in an actual deployment is possible to use the same PSS and SSS. Therefore, at the time of the LAA-LTE cell synchronization, in order to determine the sequence thereof using specific PSS / SSS may be used first macro cell and a sequence of small cells to match, as much as possible to speed up the synchronous speed. As an example, when the device 200 performs unlicensed spectrum access in LTE assistance, the search unit 201 may first secondary synchronization signal of the previous cell resides apparatus 200 as a synchronization signal sequence to search. It will be appreciated, the synchronization signal comprises a sequence of the first subset may correspond to the current or a previously authorized service synchronization signal sequence on cell band. The technical contents and technical content to be described below are equally applicable to the apparatus described in conjunction with FIG 1100.
[0047]
In the case where the device 200 needs inter-cell handover, the search unit 201 may acquire the configuration information of the first subset indication from the base station in accordance with the current serving radio resource control (RRC). A set of synchronization signal sequences may include a first plurality of cell search frequency range for the subset, and the subset of the first sequence number is included in the RRC configuration information.
[0048]
If the search unit 201 using a first subset of all the sequences are not searched for the target cell, it may be used in the third subset of the sequence to perform a search. Here is the third subset of said plurality of first cell search frequency range for one of the proper subset and different from the first subset.
[0049]
FIG 3 is a flowchart illustrating a method of wireless communication by the terminal-side apparatus disclosed embodiments of the present embodiment is used. In step S301, the synchronous signal sequence and the target frequency range to be searched corresponding to the search of the target cell. For example, in the case where the target frequency range belongs to the first frequency range, using the synchronization signal sequence centralized synchronization signal a first sequence of sub-set of the target cell searching. Here, a first subset of the subset of the set of synchronization signal sequence. In step S302, based on the searched synchronized synchronization signal, so that the synchronization device to a target cell. 2 and described with specific embodiments and modified the same in connection with FIG. 3 in FIG. 1 of the steps involved is not repeated here.
[0050]
4 will be described below with reference to FIG base station side radio communication device system embodiment of the present disclosure in accordance with 400. Device 400 includes an identifier and the group determination unit 401 secondary synchronization signal sequence generating unit 402. Identification group determining unit 401 is configured to determine a set of physical layer cell identification of the target cell. Specifically, the group determination unit 401 may be identified based on the frequency range of the target cell to determine the physical-layer cell identity group. For example, in a case where the frequency range of the target cell belongs to a first frequency range, the physical-layer cell identity determining a first subset of the group, as a true sub-set of physical layer cell identifier from the cell group identifier of the group set in the physical layer set . In one example, the identification group determining unit 401 may autonomously based on the frequency range of the target cell to determine the physical-layer cell identity group of the target cell. Alternatively, the group determination unit 401 may be identified based on the frequency range of the target cell to determine a physical layer cell identification of the target cell group according to the configuration performed by the operator's operation management and maintenance (OAM). In one example, the device 400 may further comprise means for determining the frequency range of the target cell belongs to a first frequency range determining unit.
[0051]
Secondary synchronization signal sequence generating unit 402 is configured based on the identity determined by the set of physical-layer cell identity group determination unit 401 generates a secondary synchronization signal sequence of secondary synchronization signal of the target cell. In one embodiment, the SSS secondary synchronization signal may be used Zadoff-Chu sequence of length 63 (intermediate DC subcarrier (DC subcarrier), the length of the transmission is actually 62), plus an additional reserved with the boundary 5 as a protective band sub-carriers, is formed occupies a central 72 subcarriers (without DC) of the SSS. Whether frequency division multiplexing (FDD) or time division multiplexing (TDD), SSS in subframes 0 and 5 on the transport. In LTE, SSS has its special design. For example, 2 the SSS (the SSS . 1 and the SSS 2 are located in subframe 0 and subframe 5) value 168 is derived from a set of possible values for example, the number of elements of subset 56), (see Table standard 36.211 6.11.2.1-1, SSS . 1 in the range of SSS and 2 are different, thus allowing a UE receives only the SSS timing system detects the 10ms frame (i.e., where the subframe position 0) the reason for this is that: cell search process, UE searches for a plurality of cells, the time of the search window may not be enough UE detects more than one SSS.
[0052]
In one embodiment, the first frequency range may be a range of an unlicensed frequency radio communication system. The target cell may be a cell unlicensed spectrum access. Without explanation, the first frequency range may be a need to speed up the synchronization process of other frequency ranges. For example, in a scenario with dense small cell deployment, if the UE is moving at high speed is also required rapid access to the small cell. Accordingly, the frequency range may be as small cell a first frequency range, thus speeding up the synchronization process.
[0053]
FIG 5 is a block diagram illustrating a base station apparatus 500 side, the wireless communication system in the disclosed embodiments of the present embodiment. FIG. Apparatus 500 comprises: the group identifier determination unit 501, a secondary synchronization signal sequence generating unit 502, the communication unit 503 and an information update unit 504. And a group determining unit 501 identifies the secondary synchronization signal sequence generating unit 502 has the same function and structure unit 401 and the secondary synchronization signal sequence generating unit determines the group identifier 402 described in connection with FIG. 4 is omitted here.
[0054]
In the first frequency range is a frequency range unlicensed wireless communication system, and the target cell of Example unlicensed spectrum access cell, the device 500 may transmit a secondary synchronization signal in an unlicensed frequency band corresponding to the target cell via the communication unit 503 .
[0055]
Further, in one example, the UE-side device detects the use of a first subset of the interference caused by the reference signal received by the UE side device in a first frequency range is too large, and indicative of excessive interference detection when the result is notified to the base station of the target cell, the base station apparatus side communication unit 503 may also receive 500 the notification of excessive interference. Note that in some examples, the current serving cell apparatus UE side (e.g., serving cell on the licensed band) of the target cell on the unlicensed band is co base station, in other examples, the serving cell and the target cell may by different entities manage the base station, the detection result can be notified to the serving cell base station, and then transmitted by the serving cell base station by X2 signaling to the base station of the target cell, and in some examples, the UE side device can access the target cell after direct detection result reported to the base station of the target cell. In the case where the communication unit 503 receives the notification, receiving, in response to a notification identifying the group determination unit 501 may re-determine the subset as a set of physical layer cell identity group, and is different from the first subset a second subset physical-layer cell identity group. Then, secondary synchronization signal sequence generating unit 502 generates a secondary synchronization signal may be re-sequence based on the second subset. When the flag determination unit 501 re-determines the group as a subset of a second physical-layer cell identity group information update unit 504 may generate a system broadcast information indicating information relating to the second subset comprises a target cell to be transmitted through. Alternatively, the information updating unit 504 may also include generating, system information indicating information relating to the second subset of the transmission band stay authorization.
[0056]
In a further example, the communication unit 503 can also indicate information of the second subset of the base station side notifies the other device in a wireless communication system, such as a neighbor base station apparatus side. Specific examples will be described in detail below.
[0057]
In one embodiment, the device base station side 400 (500) may acquire the physical-layer cell identity group subset of the neighboring cells of the target cell, and this cell terminal side of the device when the radio resources involved neighbor cells managed, generating a radio resource control signaling to neighbor cell subset marker set to the terminal side device.
[0058]
In another embodiment, 400 (500) a communication unit of the apparatus the base station side may also be responsive to the interference by receiving large notification, and acquires the update from the core network via the S1 interfaces the core network to report to the interference excessive event cell identification information about the group.
[0059]
FIG 6 is a flowchart illustrating a wireless communication method used in a base station apparatus side in the present embodiment of the disclosed embodiments. In step S601, it is determined group of physical layer cell identification of the target cell. The physical-layer cell identity group and related to the frequency range of the target cell. For example, in a case where the frequency range of the target cell belongs to a first frequency range, a physical-layer cell identity group only from a physical layer cell identity group set in the first subset and the first subset of the set of physical layer cell identity true subset of the set. In step S602, based on the physical-layer cell identity group generates a secondary synchronization signal sequence of secondary synchronization signal of the target cell. And variations in connection with FIG. 4 and FIG. 5 are the same in FIG. 6 the steps involved in the specific embodiments described herein, will not be repeated here.
[0060]
FIG 7 is a block diagram illustrating a wireless terminal apparatus 700 of the present embodiment in accordance with the disclosed embodiments. The wireless terminal device 700 can communicate with a base station on the first carrier. In one example, the first carrier may be authorized on a carrier frequency. The wireless terminal device 700 may include a communication unit 701 and the synchronization unit 702. The communication unit 701 may receive a synchronization signal emitted by the base station on the second carrier different from the first carrier. In one example, the second carrier may be non-authorization on a carrier band. Synchronization unit 702 may determine a secondary synchronization signal by matching a first sequence of sub-set of the synchronization signal and the secondary synchronization signal SSS sequence set. Here, the first subset is a proper subset of the set of secondary synchronization signal sequences. In one embodiment, a set of secondary synchronization signal sequences may be a set of secondary synchronization signal sequences using the wireless terminal device using the first communication carrier.
[0061]
According to the present embodiment of the present disclosure is also provided a wireless communication system base station. The base station capable of communicating with the wireless communication terminals on the first carrier. The base station includes a communication unit. The communication unit may be configured to transmit on a second carrier different from the first carrier comprises a secondary synchronization signal is a synchronization signal. Here, the secondary synchronization signal may be selected from the first subset of the subset as a set of secondary synchronization signal sequences. In one embodiment, the first carrier may be authorized carrier signal frequency band, while the second carrier may be a carrier signal on a non-licensed bands. SSS sequence may be set, for example, a set of secondary synchronization signal sequences used in the base station using the first carrier for communication.
[0062]
Hereinafter, in conjunction with FIGS. 8 and 9 described specific embodiments of the present disclosure. Note: While unlicensed spectrum access scenario in LTE to assist in FIGS. 8 and 9 as an example has been described, those skilled in the art by conventional labor scheme used in the corresponding separate unlicensed network (i.e., non-assisted LTE network).
[0063]
FIG 8 is a timing chart illustrating a synchronization process according to the present embodiment of the disclosed embodiment of the wireless communication system. Figure 8 shows a scenario in LTE assist unauthorized access spectrum. In this embodiment, all of the cell and the user equipment uses the same set of synchronization signal sequence is fixed as a subset of the first subset. At time T81, UE with the serving base station in a primary component carrier (in this embodiment a licensed band) to communicate on. At time T82, the base station transmits to the UE on the primary component carrier allowed to switch to the secondary component carrier (in this embodiment a unlicensed frequency band) to communicate on a command. At time T83, UE in response to the handover command received broadcast information on the secondary component carrier. The broadcast information carrying a fixed subset of the set of synchronization signal sequence as the first subset. At time T84, UE using, for example pre-stored in the boot file in the subset matching with the fixed synchronization sequence signal received broadcast information in the. The use of the fixed subset, it is determined in the cell must be able to access the unlicensed bands of the secondary synchronization signal, the primary synchronization signal, and the physical identification. At time T85, UE in the cell with the working frequency synchronization unauthorized, and thus the normal communication. In this embodiment, since each secondary cell using a fixed subset of the sync signal sequence (subset), and thus operate in unlicensed bands in the subset of the serving base station does not need to notify the other base stations.
[0064]
Referring also to FIG. 8, as compared to the cells and all use the same user equipment are fixed subset of the set of synchronization signal sequence as the first subset, instead, may be used in a respective fixed subset of each cell. Then, at time T84, UE first uses the default subset of broadcast information matching the synchronization signal. When the default subset can not be matched, then randomly replace other subsets match. In one example, UE may first previous communication using the same primary synchronization signals on the primary component carrier and a secondary synchronization signal as a subset of the default match.
[0065]
9 is a timing diagram illustrating the synchronization process of a wireless communication system according to another embodiment of the present disclosure. Figure 9 shows a scenario in LTE assist unauthorized access spectrum. In this embodiment, all of the first cell using the synchronization signal sequence set as a default subset of the unified first subset. At time T91, UE with the serving base station in a primary component carrier (in this embodiment a licensed band) to communicate on. At time T92, the base station transmits to the UE on the primary component carrier allowed to switch to the secondary component carrier (in this embodiment a unlicensed frequency band) to communicate on a command. At time T93, UE in response to the handover command received broadcast information on the secondary component carrier. The broadcast information carrying a fixed subset of the set of synchronization signal sequence as the first subset. At time T94, UE using, for example pre-stored in the boot file in the default subset (preferably with a default of each sub-set of the same cell subset) matched with the synchronization sequence signal received broadcast information in the. At time T95, UE in the cell with the working frequency synchronization unauthorized, and thus the normal communication.
[0066]
At time T96, UE detects whether the use of a proper subset of the synchronization sequence signal interference caused by the UE on the unlicensed frequency band received reference signal is too large. If the interference is too large, at a time T97UE excessive interference indicating a detection result to the cell base station. Alternatively, the notification may be a primary component carrier (licensed band), or a secondary component carrier (unlicensed frequency) transmitting on. At time T98, the base station in response to the notification received subset replaced with another one, or select a signal sequence (e.g. secondary synchronization signal sequence) set on the basis of the atom. Then, in time sequence, or a subset of T99 and T910, respectively, the newly selected base station to the UE, and others. Here, T99, and T910 may be the same timing, the timing may be different.
[0067]
The present invention will be described embodiments of the method of the present invention, the device flowchart and / or block diagrams according to the above reference. And each block of the flowchart or block diagrams, and / compositions / or flowchart illustrations and block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, a processor or other programmable data processing apparatus to produce a machine, such that the instructions executed by a computer or other programmable data processing apparatus, create means for implementing the flowchart and / or block diagrams predetermined function / operation of the device.
[0068]
These computer program may be instructions stored in a computer-readable medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, so that instructions stored in a computer-readable medium comprising generating a realization in the flowchart and / or the functions specified in the block diagrams / operation instruction means (instruction means) of the article of manufacture.
[0069]
The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps on the computer or other programmable data processing apparatus to produce a computer implemented process, such that in the computer or other programmable apparatus executing instructions provided on the process of implementing the flowchart and / or block diagrams predetermined functions / operations.
[0070]
It should be appreciated that the flowchart and block diagrams in the Figures illustrate a system according to various embodiments of the present invention, the architecture of the method and computer program product may be implemented, functionality, and operation. In this regard, the flowchart or block diagrams each block may represent a module, segment, or portion of code of a program, a module, segment, or which comprises one or a plurality of logic for implementing the specified executable instructions function. It should also be noted that, in some implementations Alternatively, the functions noted in the block may be different from the order noted in the figures occur. For example, two blocks shown in succession may in fact be executed substantially concurrently, they may sometimes be executed in the reverse order, depending upon the functionality involved may be. Also be noted that each block of the flowchart in block diagram, as well as combinations and / or block diagrams and / or flowchart block may perform a predetermined function or operation of dedicated hardware-based system to achieve , or may be special purpose hardware and computer instructions to implement.
[0071]
FIG 10 is a block diagram illustrating an exemplary configuration of a computer can be achieved according to the present invention. In Figure 10, a central processing unit (CPU) 1001 performs various processes in accordance with a program read only memory (ROM) 1002 or a program stored in the storage section 1003 to a random access memory 1008 is loaded from the (RAM). In the RAM 1003, it is also necessary when storing data required when CPU 1001 executes various processes.
[0072]
CPU 1001, ROM 1002 and RAM 1003 are connected to one another via a bus 1004. Input / output interface 1005 is also connected to the bus 1004.
[0073]
The following components are connected to the input / output interface 1005: an input section 1006 including a keyboard, mouse and the like; an output section 1007 including a display, such as a cathode ray tube (CRT), liquid crystal display (LCD) and the like, and a speaker and the like; a storage section 1008 including a hard disk and the like; and a communication section 1009 including a network interface card such as a LAN card, a modem and the like. The communication section 1009 performs communication processing via a network such as the Internet.
[0074]
A drive 1010 is also connected to the input / output interface 1005. Removable medium 1011 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, is mounted on a drive 1010, such that a computer program read therefrom is installed into the storage section 1008 as required.
[0075]
In the case of implementing the above-described steps and processes by software, from a network such as the Internet or a storage medium such as a removable medium 1011 constitutes the software is installed.
[0076]
Those skilled in the art will appreciate, this storage medium is not limited to 10 shown in FIG stored therein a program, and phase separation is distributed to provide programs to the user removable medium 1011. Examples of the removable medium 1011 include a magnetic disk, an optical disk (including a compact disc read only memory (CD-ROM) and digital versatile disc (DVD)), magneto-optical disk (including a mini disc (the MD)) and a semiconductor memory. Alternatively, the storage medium may be a ROM 1002, a storage section 1008 comprises a hard disk in which the program is stored and is delivered to the user with the methods comprising them.
[0077]
The base station according to the present disclosure, for example, may be implemented as any type of evolved Node B (eNB), such as a macro eNB, and a small eNB. Small eNB may cover less than a macro cell eNB cell, such as a pico eNB, the eNB and the micro family (femto) eNB. Alternatively, the base station may be implemented as any other type of base station, such as base transceiver stations and NodeB (BTS). The base station may include: a body configured to control wireless communication (also referred to as base station apparatus); and one or more remote radio heads disposed at different places of the main body (RRH). Wherein, with the development of C-RAN (Centralized, Cooperative, Cloud RAN), the main body of the radio communication control may also be the baseband processing device such as a server cloud. Further, the following various types of terminals can be described by a semi-persistently or temporarily perform the base station functions as a work station.
[0078]
The present disclosure, for example, user equipment may be implemented as a mobile terminal in accordance with (such as a smart phone, a tablet personal computer (PC), a notebook PC, a smart wearable device, a portable game terminal, a portable / mobile router and dongle type digital camera) or intelligent vehicles, vehicle terminal (such as car navigation devices). The user equipment may also be implemented as a terminal machine executed by a machine (M2M) communication (also referred to as machine type communication (MTC) terminal). In addition, the user device may be a wireless communication module on each terminal attached to the terminal (such as a wafer, comprising a single integrated circuit module).
[0079]
Hereinafter, in conjunction with FIGS. 11 to 13 illustrate application examples of a base station and user equipment.
[0080]
In certain scenarios, for example, a small cell base station or to implement the above described base station according to the present disclosure by the macro. Small cell base station and a macro base station may be implemented using the eNB 12 illustrated in FIG. 11 and FIG.
[0081]
FIG 11 is a block diagram of a first exemplary embodiment schematically illustrating the disclosed technology may be applied eNB configuration. eNB 1100 includes one or more antennas 1110 and base station apparatus 1120. Each base station apparatus 1120 and antenna 1110 may be connected to each other via a RF cable.
[0082]
Each antenna 1110 includes a single or a plurality of antenna elements (such as including a multiple input multiple output (MIMO) antennas in a plurality of antenna elements), and base station apparatus 1120 to transmit and receive wireless signals. As shown in FIG. 11, eNB 1100 can comprise a plurality of antennas 1110. For example, multiple antennas 1110 may be compatible with a plurality of frequency bands used by eNB 1100. Although FIG. 11 shows an example in which a plurality of antennas 1110 comprises eNB1100 examples, the eNB 1100 may also include a single antenna 1110.
[0083]
The base station apparatus 1120 includes a controller 1121, a memory 1122, a network interface 1123 and a wireless communication interface 1125.
[0084]
The controller 1121 may, for example, CPU or DSP, and operation of the various higher layer of the base station apparatus 1120. For example, the controller 1121 generates packet data according to the data signal by the wireless communication interface processing in 1125, and to transmit the generated packet via the network interface 1123. The controller 1121 may be tied to the data from the baseband processor to generate a plurality of packet bundle, bundling and transmitting the generated packet. The controller 1121 may have a function to execute control logic: the control such as a radio resource control, radio bearer control, mobility management, admission control and scheduling. This control may be incorporated close to the core network node or the eNB performed.
[0085]
The memory 1122 includes a RAM and a ROM, and various types of control programs and data (such as terminal list, the transmission power data and schedule data) executed by the controller 1121.
[0086]
The network interface 1123 for the base station apparatus 1120 is connected to a core network communications interface 1124. The controller 1121 may communicate with the core network node or another eNB via the network interface 1123. In this case, eNB 1100 and other core network node or the eNB may be connected to each other through the logical interface (such as the S1 interface and the X2 interface). The network interface 1123 may also be a wired communication interface or a wireless communication interface for the wireless backhaul. If the network interface is a wireless communication interface 1123, compared with the band used by the wireless communication interface 1125, network interface 1123 may use a higher frequency band for radio communication.
[0087]
A wireless communication interface 1125 to support any cellular communication protocol (such as Long Term Evolution (LTE) and LTE- Advanced), via the antenna 1110 and provided to a terminal located in the cell eNB 1100 wireless connection. Wireless communication interface 1125 may generally include a processor 1126 and an RF circuit, for example, a baseband (BB) 1127. BB processor 1126 may perform, for example, encoding / decoding, modulation / demodulation, and a multiplexing / demultiplexing, and performs layer (e.g. L1, medium access control (the MAC), Radio Link Control (RLC) and packet data convergence protocol ( the PDCP)) in various types of signal processing. Instead of the controller 1121, BB processor 1126 may have the above-described part or all of the logic functions. BB processor 1126 may be a memory storing a communication control program, or is configured to execute a program comprising a processor module and associated circuitry. Update to the BB processor 1126 functional changes. The module may be inserted into the slot of the base station apparatus 1120 or insert a card. Alternatively, the module may be a chip on a card or blade is mounted. Meanwhile, RF circuitry 1127 may include, for example, mixers, filters and amplifiers, and to transmit and receive wireless signals via the antenna 1110.
[0088]
11, wireless communication interface 1125 may include a plurality of processors 1126 BB. For example, a plurality of BB processor 1126 may be compatible with a plurality of frequency bands used by eNB 1100. 11, wireless communication interface 1125 may include a plurality of RF circuits 1127. For example, a plurality of RF circuitry 1127 may be compatible with a plurality of antenna elements. Although FIG. 11 shows a state where a wireless communication interface 1125 comprises a plurality of BB exemplary processors 1126 and 1127 of the plurality of RF circuits, the wireless communication interface 1125 may include a single processor BB 1126 or 1127 single RF circuit.
[0089]
FIG 12 is a block diagram of a second exemplary embodiment illustrating a schematic configuration of the disclosed technology may be applied eNB. eNB 1200 includes one or more antennas 1210, 1220 and the base station apparatus RRH 1230. RRH1230 and each antenna 1210 may be connected to each other via an RF cable. RRH1230 base station apparatus 1220 and may be connected to each other via a high-speed line such as a fiber optic cable.
[0090]
Antenna 1210 each include a single or a plurality of antenna elements (such as including a plurality of antennas in MIMO antenna elements) and for RRH 1230 transmit and receive wireless signals. As shown in FIG. 12, eNB 1200 can comprise a plurality of antennas 1210. For example, a plurality of frequency bands may be compatible with a plurality of antennas 1210 eNB1200 used. Although FIG. 12 shows an example in which the eNB 1200 comprises a plurality of antennas 1210, but the eNB 1200 may also include a single antenna 1210.
[0091]
The base station apparatus 1220 includes a controller 1221, a memory 1222, a network interface 1223, interfaces 1225, and a wireless communication connection interface 1227. The controller 1221, a memory 1222 and a network interface 1223 described with reference to FIG. 12 described controller 1221, a memory 1222 and a network interface 1223 the same. The network interface 1223 for connecting the base station apparatus 1220 to the core network 1224.
[0092]
A wireless communication interface 1225 to support any cellular communications scheme (such as LTE and LTE- Advanced), and provided to the wireless communication terminal and the RRH 1230 is located corresponding to the sector antenna via RRH 1230 and 1210. Wireless communication interface 1225 may generally comprise, for example, a processor 1226 BB. In addition to the BB processor 1226 is connected to the RRH RF circuitry 12341230 1227 via the connection interface, the processor described in the same BB BB processor 1226 111 126 with reference to FIG. As shown, the wireless communication interfaces 122 512 may include a plurality of processors 1226 BB. For example, a plurality of BB processor 1226 may be compatible with a plurality of frequency bands used by eNB 1200. Although FIG. 12 shows a state where a wireless communication interface 1225 comprises a plurality of sample processors BB 1226, the wireless communications interface 1225 may include a single processor 1226 BB.
[0093]
An interface 1227 for connection to a base station apparatus 1220 (a wireless communication interface 1225) is connected to the interface 1230 RRH. Interface 1227 may also be connected to the base station apparatus 1220 (a wireless communication interface 1225) is connected to the high-speed line RRH 1230 in the communication module.
[0094]
RRH 1230 includes a connection interface 1231 and a wireless communication interface 1233.
[0095]
Connection interface 1231 for the RRH 1230 (1233 wireless communication interface) connected to the interface of the base station apparatus 1220. Interface 1231 may also be connected to the high-speed lines in the communication module.
[0096]
A wireless communication interface 1233 to transmit and receive wireless signals via the antenna 1210. Wireless communication interface 1233 may generally comprise, for example, RF circuit 1234. RF circuit 1234 may include, for example, mixers, filters and amplifiers, and to transmit and receive wireless signals via the antenna 1210. As shown, the wireless communication interface 1233 may include a plurality of RF circuits 123,412. For example, RF circuit 1234 may support a plurality of a plurality of antenna elements. Although FIG. 12 shows a state where a wireless communication interface 1233 comprises a plurality of RF circuits 1234 example, the wireless communication interface 1233 may also comprise a single RF circuit 1234.
[0097]
ENB and eNB 1200 in 1100 is shown in FIG. 11 and FIG. 12, the communication unit may be described by FIG. 5 1123 implemented by a wireless communication interface 1100 is a combination eNB or the network interface 1125 and an antenna 1110, 1200 by the eNB or may be of RRH 1230 and base station apparatus 1220 is a wireless communication interface 1225 to jointly achieved by the connection interface therebetween. Such as identification set determining unit 401/501, secondary synchronization signal sequence generating section 402/502, and an information updating unit 504 may be implemented by the controller 1121 or 1221 controllers.
[0098]
Described hereinabove communication device according to the present embodiment of the disclosed embodiments may be implemented as a smart phone. For example, a smart phone may function as a turn wifi hotspot wifi access device. wifi between the smart phones and other intelligent terminal connection using unlicensed spectrum. For example, the spectrum management managed directly from the smartphone unauthorized use of spectrum.
[0099]
FIG 13 is a block diagram illustrating a schematic configuration of the disclosed technology may be applied smartphone 1300. A smart phone 1300 includes a processor 1301, memory 1302, storage device 1303, an external connection interface 1304, the image pickup device 1306, a sensor 1307, a microphone 1308, an input device 1309, a display device 1310, a speaker 1311, a wireless communication interface 1312, one or more antenna switch 1315, one or more antennas 1316, bus 1317, a battery 1318 and an auxiliary controller 1319.
[0100]
The processor 1301 may, for example, a CPU or system on a chip (SoC), a smart phone and controls the application layer 1300 and the additional layer functions. The memory 1302 includes a RAM and ROM, and stores data and programs executed by the processor 1301. Memory device 1303 may include a storage medium, such as a semiconductor memory and a hard disk. 1304 external connection interface for connecting an external device (such as a memory card, and a universal serial bus (USB) device) 1300 to interface to a smart phone.
[0101]
Image pickup apparatus 1306 includes an image sensor (such as a charge coupled device (CCD) and complementary metal oxide semiconductor (CMOS)), and generates a captured image. Sensor 1307 may include a set of sensors, such as a measuring sensor, a gyro sensor, a geomagnetic sensor and an acceleration sensor. Microphone input to the smart phone 1308 1300 sound into an audio signal. The input device 1309 comprises, for example, it is configured to detect a touch on the screen of the touch sensor device 1310, a keypad, a keyboard, buttons or switches displayed, and receives operation input from a user or information. The display device 1310 includes a screen (such as a liquid crystal display (LCD) and organic light emitting diode (OLED) display), and displays the output image 1300 is a smart phone. 1300 intelligent audio signal output from the speaker 1311 phone is sound.
[0102]
A wireless communication interface 1312 to support any cellular communications scheme (such as LTE and LTE- Advanced), and performs wireless communication. Wireless communication interface 1312 may generally comprise, for example, a processor 1313 and an RF circuit BB 1314. BB processor 1313 may perform, for example, encoding / decoding, modulation / demodulation, and a multiplexing / demultiplexing, and performs various types of signal processing for wireless communication. Meanwhile, RF circuitry 1314 may include, for example, mixers, filters and amplifiers, and to transmit and receive wireless signals via the antenna 1316. Wireless communication interface 1312 may be integrated for the BB processor 1313 and an RF circuit chip 1314 of a module. 13, wireless communication interface 1312 may include a plurality of processors BB plurality of RF circuits 1313 and 1314. Although FIG. 13 shows a state where a wireless communication interface 1312 comprises a plurality of sample processors BB plurality of RF circuits 1313 and 1314, the wireless communications interface 1312 may include a single processor BB 1313 or 1314 single RF circuit.
[0103]
Further, in addition to a cellular communication scheme, a wireless communication interface 1312 may support additional types of wireless communication scheme, such as a short-distance wireless communication scheme, a near field communication scheme and wireless local area network (LAN) scheme. In this case, a wireless communication interface 1312 may include a processor 1313 1314 BB for each wireless communication scheme and the RF circuit.
[0104]
Each of the circuits comprises a plurality (e.g. a circuit for different wireless communication schemes) in a wireless communication interface 1312 and switch between antenna connection destination of the antenna switch 1316 1315.
[0105]
Each antenna 1316 includes a single or a plurality of antenna elements (such as including a plurality of antenna elements in MIMO antenna), a wireless communication interface 1312 and for transmitting and receiving wireless signals. As shown in FIG. 13, a smart phone 1300 may include a plurality of antennas 1316. Although FIG. 13 shows an example in which a plurality of smart phone 1300 includes an antenna 1316, but also a smart phone 1300 may include a single antenna 1316.
[0106]
In addition, the smart phone 1300 may include an antenna for each wireless communication scheme 1316. In this case, the antenna switch 1315 may be omitted from the configuration of the smartphone 1300.
[0107]
1317 bus processor 1301, memory 1302, storage device 1303, an external connection interface 1304, the image pickup device 1306, a sensor 1307, a microphone 1308, an input device 1309, a display device 1310, a speaker 1311, a wireless communication interface 1312 and an auxiliary controller 1319 each other connection. Smartphone respective blocks 1300 through 1318 illustrated in FIG feeder 13 to provide the battery power, in FIG feeder are partially shown as a dashed line. Auxiliary controller 1319, for example, the minimum operating necessary functions of the smart phone 1300 in the sleep mode.
[0108]
Smart phone 1300 shown in FIG. 13, for example, the search unit 101/201, 102/202 synchronization unit, detection unit 203 may be implemented by processor 1301. Further, for example, the notification unit 204 and the communication unit 701 may be implemented by, or in connection with a wireless communication interface 1312 and a wireless communication interface 1312 to the antenna 1316.
[0109]
It will be appreciated, as used herein, the term, only for describing particular embodiments and are not intended to limit the present invention. The singular forms used herein, "a" and "the" are intended to include the plural forms unless the context clearly indicates otherwise. Also we know, "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers , steps, operations, elements, and / or components, and / or combinations thereof.
[0110]
The present invention is described with reference to specific embodiments in the foregoing specification. However, those of ordinary skill in the art appreciate that various modifications and changes without departing from the scope of the invention as defined in the claims premise.
[0111]
The following may also be achieved according to embodiments of the techniques of this disclosure.
[0112]
1. A device-side terminal in a wireless communication system, comprising:
[0113]
A search unit configured to search for the target cell is a synchronous signal sequence and the target frequency range corresponding to be searched; and
[0114]
A synchronization unit configured to synchronize based on the search unit detects the synchronization signal, so that the synchronization device to a target cell,
[0115]
Wherein, when the target frequency range belongs to the first frequency range, the search unit using the synchronization signal sequence centralized synchronization signal a first sequence of sub-set of the target cell search, wherein the first subset is a proper subset of the set of synchronization signal sequence set.
[0116]
2. The terminal device 1 side in accordance with the program, wherein a first frequency range of an unlicensed frequency band in the range of a wireless communication system, the target cell is a cell unlicensed spectrum access.
[0117]
3. The terminal device side according to embodiment 2, wherein the synchronization signal is a synchronization signal sequence sequence set used for on-carrier communication device using an unlicensed band set.
[0118]
1 to 4. The device of any one of the terminal side according to embodiment 3, wherein the synchronization signal sequence is the slave sync signal sequences, the search unit is configured to employ a secondary synchronization signal sequence and the target frequency range corresponding to the secondary target cell sync signal is decoded.
[0119]
5. The apparatus of embodiment 1 of the terminal side according to any one of 4, further including: a communication interface, the communication interface is configured to obtain a search command to the target cell and the first cell on a first subset by a licensed band instructions.
[0120]
6. The terminal side apparatus according to claim 5, wherein the communication interface includes a command receiving layer signaling information indicating the first cell.
[0121]
1 to 7. The apparatus of any one of the terminal side according to embodiment 4, wherein the apparatus further comprises a communication interface, the device is configured to access the target cell, instructions on acquiring synchronization signal sequence is updated by the target cell .
[0122]
8. The apparatus of embodiment 1 of the terminal side according to 7, further comprising:
[0123]
A detection unit configured to detect whether the use of a first subset of the device caused by the reference signal received on a first frequency range of the interference is too large; and
[0124]
A notification unit configured to detect the interference is too large, the detection result is notified to the base station of the target cell.
[0125]
9. The terminal side apparatus according to claim 8, wherein,
[0126]
Synchronization signal sequences comprises a first plurality of cell search frequency range for the subset, the detection target cell base station search unit, in response to a notification indicating excessive interference from a plurality of reselected proper subset of the second subset, and synchronization signal re-transmitted by the base station of the target cell, wherein the second subset of the first subset are different; and
[0127]
Searching unit decoding the synchronization signal retransmitted using a second subset of the instructions.
[0128]
10. The apparatus of embodiment 1 of the terminal side according to 9, wherein, when the device performs unlicensed spectrum access in LTE auxiliary, using the cell search unit first secondary synchronization signal as a synchronizing device previously resident signal sequence to search.
[0129]
11. The apparatus of embodiment 1 to the terminal side according to any one of 9, wherein, in a case where the device needs inter-cell handover, the control unit searches the configuration information acquisition indication of the first subset of radio resources from the base station in accordance with.
[0130]
12. The apparatus of embodiment 11 of the terminal side, wherein the synchronization signal comprises a sequence set for a plurality of the first subset cell search frequency range, a first subset of the sequence number is included in the RRC configuration information.
[0131]
13. The apparatus of embodiment 1 to the terminal side according to any one of 12, wherein, in the case where all of the sequences in the first subset can not be searched for the target cell, the search unit using the third subset perform a search sequence, a plurality of third subset is the first cell search frequency range for one of the proper subset and different from the first subset.
[0132]
14. A wireless communication method used by the terminal side apparatus, comprising:
[0133]
Using the sync signal sequence and the target frequency range to be searched corresponding to the search target cell; and
[0134]
Synchronization based on the searched synchronization signal, so that the synchronization device to a target cell,
[0135]
Wherein, when the target frequency range belongs to the first frequency range, using the synchronization signal sequence centralized synchronization signal a first sequence of sub-set of the target cell search, wherein the first subset is a proper subset of the set of synchronization signal sequence.
[0136]
15. A wireless communication system base station side device, comprising:
[0137]
Group identifier determination unit configured to determine a set of physical layer cell identification of the target cell, wherein the set of physical layer cell identification frequency range about the target cell;
[0138]
Secondary synchronization signal sequence generating unit configured to generate a set of physical layer cell identification sequences for the secondary synchronization signal of the secondary synchronization signal based on the target cell,
[0139]
Wherein the frequency range in a case where the target cell belongs to a first frequency range, a physical-layer cell identity group derived from a set of physical layer cell identity group in the first subset, proper subset of the first subset of the physical layer cell identifier of the group set set.
[0140]
16. The base station side device according to embodiment 15, wherein the first frequency range unlicensed frequency band in the range of a wireless communication system, the target cell is a cell unlicensed spectrum access.
[0141]
17. The base station side device according to embodiment 16, further comprising a communication unit, a communication unit is configured in the target cell corresponding to the unlicensed frequency band transmitted secondary synchronization signal.
[0142]
18. The base station side device according to embodiment 16, further comprising:
[0143]
A communication unit configured to excessive notice the use of the first subset to cause interference reference signal received by the terminal is received from the terminal;
[0144]
Wherein in response to receiving the notification, the group determination unit re-determines the identification physical layer cell identity group set as a second subset of the set of physical layer cell identifier, the second subset is a proper subset of the set of physical layer cell identity and the first different subsets, and the secondary synchronization signal sequence generating unit secondary synchronization signal sequence based on a second subset regenerated.
[0145]
19. The base station side device according to embodiment 18, further comprising:
[0146]
Information updating unit is configured to generate a target cell to be transmitted by system information on the broadcast information indicating the second subset.
[0147]
20. The base station side device according to embodiment 18, further comprising:
[0148]
Information updating unit configured to generate broadcast information including stay system, indicating information about the second subset sent on the licensed band.
[0149]
21. The embodiment of a base station side device 18 to any of 20, the communication unit is further configured side to the other base station apparatus information indicating the second subset notifies the radio communication system.
[0150]
22. The base station side device of any one of embodiment 15 to 21, wherein,
[0151]
Base station side equipment obtains the target cell physical layer cell identifier subset of the set of neighboring cells, and in the case involving the neighbor cell side of the cell terminal radio resource management apparatus generates radio resource control signaling to neighbor cell identity subset of the set to the terminal side device.
[0152]
23. The base station side device according to embodiment 18, wherein the communication unit is further configured to in response to receiving the notification, the event excessive interference reports to the core network through an S1 interface, and to obtain information about the updated cell identity from the group of core network information.
[0153]
24. A wireless communication method used in a base station side device, comprising:
[0154]
Determining a target cell's physical layer cell identity group, wherein the physical-layer cell identity group and the relevant frequency range of the target cell;
[0155]
Generating a secondary synchronization signal sequence of secondary synchronization signal of the target cell based on the physical-layer cell identity group,
[0156]
Wherein, in a case where the frequency range of the target cell belongs to a first frequency range, a physical-layer cell identity group only from a physical layer cell identity group set in the first subset, the first subset of physical layer cell identifier of the group set proper subset.
[0157]
25. A wireless terminal device capable of communicating with a base station, comprising a first carrier:
[0158]
A communication unit configured to receive messages from the base station on a second carrier different from the first carrier of the synchronizing signal;
[0159]
A synchronization unit, configured to match the sequence by a first sub-set of secondary synchronization signal and secondary synchronization signal synchronization signal to determine the sequence set secondary synchronization signal, wherein a first subset of signal sequence is a secondary synchronization sub-set of true set.
[0160]
26. A base station in a wireless communication system, a communication terminal capable of wireless communication, comprising a base station on a first carrier:
[0161]
A communication unit configured to transmit a secondary synchronization signal including a synchronization signal on a second carrier different from the first carrier;
[0162]
Wherein the selected subset of the first secondary subset of the set of synchronization signal sequence, a first subset of the set of secondary synchronization signal sequence secondary synchronization signal.

Claims
[Claim 1]
A radio communication system, the terminal-side apparatus, comprising: a searching unit configured synchronization signal sequence corresponding to the target cell using the target as a search frequency range to be searched; and a synchronization unit, configured based on the search unit detects a synchronization signal synchronized to the apparatus such that synchronization to the target cell, wherein, in a case where the target frequency range belonging to a first frequency range, the search unit uses a first set of synchronization signal sequence synchronization signal sequence of the subset of the search target cell, wherein the subset of the first subset of the set of synchronization signal sequences.
[Claim 2]
The terminal side apparatus according to claim 1, wherein the first frequency range to the wireless communication system according to an unlicensed frequency band range, the target cell is a cell unlicensed spectrum access.
[Claim 3]
The terminal-side apparatus according to claim 2, wherein the synchronization signal is a synchronization signal sequence sequence set used for the apparatus on the carrier communication using a licensed band set.
[Claim 4]
A device according to any one of the terminal side according to claim 3, wherein the synchronization signal sequence is the slave sync signal sequences, the search unit is configured to synchronize with the target frequency range corresponding to employ secondary signal sequence to the target cell secondary synchronization signal is decoded.
[Claim 5]
A terminal apparatus according to any one side of claims 1 to 4, wherein said terminal-side apparatus for a user equipment, further comprising: a communication interface, said communication interface is configured as a first through a licensed band on acquiring cell information instruction command, and to search the first subset of the target cell.
[Claim 6]
The apparatus of claim 5 terminal side, wherein the communication interface comprises a cell received by the first command, and the indication of the signaling information.
[Claim 7]
The terminal apparatus according to any one side of any one of claims 1 to 4, wherein, wherein the apparatus-side terminal is a user equipment, said apparatus further comprising a communication interface configured to access to the device after the target cell, acquiring the updated target cell indicated by the relevant synchronization signal sequences.
[Claim 8]
The terminal side apparatus according to any one of claims 1 to 7, further comprising: a detection unit configured to detect whether the use of the first sub-set caused by the device in the first frequency range receiving a reference signal interference excessive; and a notification unit configured to detect the interference overload is large, the detection result to the base station of the target cell.
[Claim 9]
Terminal side apparatus according to claim 8, wherein the synchronization signal comprises a sequence set for the cell search frequency range first subset of the plurality, is detected by the search unit in response to the base station of the target cell is too large by the interference notification indicating proper subset of said plurality of reselected from the second subset, and a synchronization signal from the base station of the target cell re-transmitted, wherein the second subset of the different from the first subset; and the search unit decoding the synchronization signal according to the indication retransmitted using the second subset.
[Claim 10]
The terminal apparatus as claimed in any one side of claims 1 to 9, wherein, when the device is not authorized to perform the secondary spectrum of the LTE access, the search unit firstly using the apparatus previously resident cell secondary synchronization signal as the synchronization signal sequence to search.
[Claim 11]
The terminal apparatus as claimed in any one side of claims 1 to 9, wherein, in a case where the device needs inter-cell handover, acquires the search unit with respect to the radio resource control according to the configuration information from the base station indicating the first subset.
[Claim 12]
The apparatus according to claim side terminal, wherein, the synchronization signal comprises a sequence set of the plurality of the first subset cell search frequency range, a first subset of the sequence number is included in the said RRC configuration information.
[Claim 13]
An apparatus according to any of the terminal 12 side to one of the claims, wherein, in the case where all the first sub-set of sequences are not searched for the target cell, the search unit using the third subset sequence performing the search, the third subset of said plurality of cell search for a first frequency range and one proper subset of the first subset are different.
[Claim 14]
A radio communication method used by the terminal side apparatus, comprising: a synchronous signal sequence and the target frequency range to be searched corresponding to the target cell search; search and synchronization based on synchronization signals, so that the device synchronization to the target cell, wherein, in a case where the target frequency range belonging to a first frequency range, using the synchronization signal sequence centralized synchronization signal a first sequence of sub-set of the search target cell, wherein said a first subset of the set of the synchronization signal sequence subset.
[Claim 15]
A wireless communication system base station side apparatus, comprising: a group identifier determination unit configured to determine a set of physical layer cell identification of the target cell, wherein the frequency range of the physical-layer cell identity group and related to the target cell ; secondary synchronization signal sequence generating unit configured to SSS sequence based on the set of physical layer cell identification of the target cell generates a secondary synchronization signal, wherein the frequency range of the target cell belongs to a first frequency the scope of the physical layer cell identity group derived from a set of physical layer cell identity group a first subset of the first subset is a proper subset of the set of physical layer cell identifier of the group.
[Claim 16]
The base station side apparatus according to claim 15, wherein the first frequency range to the wireless communication system according to an unlicensed frequency band range, the target cell is a cell unlicensed spectrum access.
[Claim 17]
Base station side device according to claim 16, wherein the base station apparatus side is the eNB, further comprising a communication unit, the communication unit is configured to transmit the target cell corresponding to the secondary unlicensed frequency bands synchronization signal.
[Claim 18]
The base station side device according to claim 16, wherein the base station apparatus side is the eNB, further comprising: a communication unit configured to receive from the terminal regarding the use of the first subset causing the receiving terminal interference reference signal is too large notification; wherein in response to receiving the notification, the determination unit re-determines the group identifier of the physical layer cell identity group set in the second subset as the physical layer cell identity group the second subset is a proper subset of the set of physical layer cell identity and is different from the first subset and the secondary synchronization signal generating means regenerates sequence based on the second subset of the secondary synchronization signal sequence.
[Claim 19]
The base station side apparatus according to claim 18, further comprising: an information updating unit configured to generate a cell to be transmitted through the target, the system broadcast information indicates information related to the second subset.
[Claim 20]
The base station side apparatus according to claim 18, further comprising: an information updating unit configured to generate a stay on the licensed band transmission, system information indicating information relating to the second subset.
[Claim 21]
The base station apparatus 18 to the side 20 of any one of claims, said communication unit is further configured information indicating the second subset of the base station-side apparatus notifies the other wireless communication system.
[Claim 22]
The base station apparatus as claimed in any one side of claims 15 to 21, wherein the base station side device to obtain a cell identifier subset of the set of neighboring cells of the target cell is a physical layer, and the terminal side of the cell devices relates to the case where the neighboring cell radio resource management, radio resource control signaling to generate the set of neighbor cells identified subset notify the terminal apparatus side.
[Claim 23]
The base station side apparatus according to claim 18, wherein the communication unit is further configured to respond to the notification received by the S1 interface to report to the core network of the interference is too large events, and from the core network access to information and updates related to cell identity group.
[Claim 24]
A wireless communication method used in a base station side device, comprising: determining a set of physical layer cell identification of the target cell, wherein the physical layer cell identity group and frequency range of the relevant target cell; based on the physical layer generates a set of cell identification sequences of secondary synchronization signal of the secondary synchronization signal of the target cell, wherein the target frequency range in a case where a first cell belonging to the frequency range of the physical-layer cell identity group only from the physical layer cell identity group set in the first subset, the first subset is a proper subset of the set of physical layer cell identifier of the group.
[Claim 25]
A wireless terminal device capable of communicating with a base station, comprising on a first carrier: a communication unit configured to receive a synchronization signal emitted by the base station on the second carrier different from the first carrier; and a synchronization unit configured to sequence the first subset of the synchronization signal and the secondary synchronization signal SSS sequence set matching to determine the secondary synchronization signal, wherein the first subset is a set of secondary synchronization signal sequence proper subset.
[Claim 26]
A wireless communication system base station capable of wireless communication terminal and the base station on a first carrier comprising: a communication unit configured to transmit on a second carrier different from the first carrier comprises a secondary synchronization signal synchronization signal; wherein the subset of the subset of the first secondary synchronization signal sequence selected secondary synchronization signal of the set, the first subset is the set of secondary synchronization signal sequence.