WO2012137927A1 - 無線通信システム、ネットワーク装置、無線端末及び通信制御方法 - Google Patents
無線通信システム、ネットワーク装置、無線端末及び通信制御方法 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- the present invention has the following features.
- a feature of the present invention is that it includes a network device (HSS140) and wireless terminals (UE200-1 and UE200-2), and is based on a plurality of communication schemes (LTE and W-CDMA) constituting different communication areas.
- a wireless communication system wireless communication system 1 that enables wireless communication, wherein the network device searches for a ratio of time for searching a communication area (cell) for each of the plurality of communication methods (cell search). (Time allocation ratio information) is transmitted to the wireless terminal, and the wireless terminal receives the search ratio information and searches for communication areas corresponding to the plurality of communication methods according to the search ratio information. .
- a feature of the present invention is that the network device increases the corresponding search ratio as the communication method has a higher index related to the communication quality, and decreases the corresponding search ratio as the communication method has a lower index related to the communication quality.
- the gist increases the corresponding search ratio as the communication method has a higher index related to the communication quality, and decreases the corresponding search ratio as the communication method has a lower index related to the communication quality.
- a feature of the present invention is that the index related to the communication quality for each of the plurality of communication methods in a predetermined area is the number of radio base stations for each of the plurality of communication methods installed in the predetermined area. .
- the gist of the present invention is that the network device estimates a moving direction of the wireless terminal and obtains a ratio of time for searching a communication area for each of the plurality of communication methods according to an estimation result. .
- a feature of the present invention is a network device that manages a wireless communication system that enables wireless communication by a wireless terminal using a plurality of communication methods that form different communication areas, and searches for a communication area for each of the plurality of communication methods.
- the gist is to transmit search ratio information indicating a ratio of time to the wireless terminal.
- a feature of the present invention is a wireless terminal capable of wireless communication by a plurality of communication methods constituting different communication areas, and receives search ratio information indicating a ratio of time for searching a communication area for each of the plurality of communication methods.
- the gist is to search for communication areas corresponding to the plurality of communication methods in accordance with the search ratio information.
- a feature of the present invention is a communication control method in a wireless communication system that includes a network device and a wireless terminal, and enables wireless communication by the wireless terminal using a plurality of communication methods that form different communication areas.
- FIG. 1 is an overall schematic configuration diagram of a wireless communication system according to an embodiment of the present invention. It is a figure which shows arrangement
- a wireless communication system supporting W-CDMA includes W-CDMA base stations 20-1 to 20-n (hereinafter referred to as W-CDMA base station 20-1 to W-CDMA base station). 20-n are collectively referred to as “CDMA base station 20” as appropriate, BSC (Base Station Controller) 100, MSC / VLR (Mobile Switching Center / Visitor Location Register) 110, GMCS (Generalized Multi Carrier Subsystem) 120, and , Including an exchange 130.
- BSC 100, the MSC / VLR 110, the GMCS 120, and the exchange 130 are installed in a backhaul (W-CDMA backhaul) in a wireless communication system that supports W-CDMA.
- the wireless communication system 1 also supports a wireless communication system compatible with LTE and a wireless communication system compatible with W-CDMA, an HSS (Home Subscriber Server) 140, and a wireless communication system compatible with LTE and W-CDMA. And a network 151 for connecting to the wireless communication system.
- FIG. 2 is a diagram showing a cell arrangement of the wireless communication system. As shown in FIG. 2, the cell 11 configured by the LTE base station 10 and the cell 21 configured by the W-CDMA base station 20 have overlapping areas.
- the control unit 141 is configured using, for example, a CPU (Central Processing Unit) or a DSP (Digital Signal Processor), and controls various functions included in the HSS 140.
- the storage unit 142 is configured by a memory, for example, and stores various information used for control in the HSS 140 and the like.
- the I / F unit 143 communicates with the UE 200-1 and the UE 200-2 via the MME 90, the router, and the LTE base station 10 that configure the LTE wireless communication system.
- the I / F unit 143 communicates with the UE 200-1 and the UE 200-2 via the MSC / VLR 110, the BSC 100, and the W-CDMA base station 20.
- the wireless communication unit 206 includes an RF circuit, a baseband circuit, etc., performs modulation and demodulation, encoding and decoding, etc., and is connected to the LTE base station 10 and the W-CDMA base station 20 via the antenna 208. Transmit and receive radio signals.
- the control unit 202 of the UE 200 includes the time when the handover occurs and the position of the UE 200 when the handover occurs.
- the handover information is stored in the storage unit 203.
- the control unit 202 of the UE 200 After at least two handovers occur, the control unit 202 of the UE 200 generates a cell search time distribution ratio request.
- the cell search time distribution ratio request includes the time for searching for the cell 11 configured by the LTE base station 10 and the cell 21 configured by the W-CDMA base station 20 when the UE 200 searches for a cell. This is a message for requesting a ratio (cell search time distribution ratio) to the search time.
- the cell search time distribution ratio request includes handover information (current handover information) corresponding to the current (latest) handover and handover information (previous handover information) corresponding to the previous (previous) handover.
- the previous handover information includes the time Tc and the position Pc
- the current handover information includes the time Td and the position Pd.
- the LTE base station 10 or W-CDMA base station 20 to which the UE 200 is connected receives the cell search time allocation ratio request.
- the LTE base station 10 or the W-CDMA base station 20 includes a cell ID that is identification information of the own base station in the cell search time distribution ratio request.
- the LTE base station 10 or the W-CDMA base station 20 transmits a cell search time distribution ratio request including the cell ID to the HSS 140.
- LTE cell laying information in which a cell ID is associated with position information indicating the installation position of the LTE base station 10 is stored.
- W-CDMA cell laying information in which a cell ID and position information indicating the installation position of the W-CDMA base station 20 are associated with each other. Is remembered.
- the control unit 141 of the HSS 140 extracts the cell ID, current handover information, and previous handover information included in the cell search time distribution ratio request.
- the control unit 141 of the HSS 140 calculates the velocity vector Vcd of the UE 200 from the previous handover to the current handover according to the following formula 1.
- the control unit 141 of the HSS 140 estimates the position of the destination of the UE 200 after a predetermined time from the Pd that is the current position of the UE 200 and the speed vector Vcd. Specifically, the control unit 141 of the HSS 140 moves the position of the UE 200 after a predetermined time in a direction from the Pd to the speed vector Vcd and separated by a value obtained by multiplying the predetermined time by the magnitude of the speed vector Vcd. The destination position.
- the control unit 141 of the HSS 140 sets a position where the UE 200 is moved to the front end and sets a sector-shaped area that is symmetrical with respect to the velocity vector Vcd from the front end as a calculation area.
- the control unit 141 of the HSS 140 After the calculation area is set by either the first process or the second process, the control unit 141 of the HSS 140 includes the LTE cell laying information stored in the storage unit 142 in the LTE cell laying information. LTE cell laying information whose position indicated by the position information is within the calculation area is read. The control unit 141 of the HSS 140 includes the W-CDMA cell in which the position indicated by the position information included in the W-CDMA cell laying information in the W-CDMA cell laying information stored in the storage unit 142 is within the calculation area. Read laying information.
- the number of read LTE cell laying information indicates the number of LTE base stations 10 in the calculation area.
- the number of read W-CDMA cell laying information indicates the number of W-CDMA base stations 20 in the calculation area.
- the number of LTE base stations 10 in the calculation area is an index related to the communication quality of the LTE communication method in the calculation area. The larger the number of LTE base stations 10 in the calculation area, the better the communication quality. .
- the number of W-CDMA base stations 20 in the calculation area is an index relating to the communication quality of the W-CDMA communication scheme in the calculation area. The larger the number of W-CDMA base stations 20 in the calculation area, Communication quality is good.
- the control unit 141 of the HSS 140 includes a cell 11 configured by the LTE base station 10.
- the ratio (cell search time distribution ratio) between the time Tlr for searching for the time Tcr for searching for the cell 21 constituted by the W-CDMA base station 20 is calculated.
- FIG. 5 is a diagram showing an example of the cell search time distribution ratio.
- FIG. 5B is an example in the case where the UE 200-2 moves as shown in FIG. As shown in FIG. 2, the UE 200-2 is moving in the direction of the area where only the cell 21 configured by the W-CDMA base station 20 exists. For this reason, the cell search time allocation ratio is only a search of the cell 21 configured by the W-CDMA base station 20 as shown in FIG.
- the control unit 202 of the UE 200 receives the cell search time distribution ratio response via the antenna 208 and the wireless communication unit 206.
- the control unit 202 of the UE 200 searches the cell 11 configured by the LTE base station 10 according to the cell search time allocation ratio information included in the cell search time allocation ratio response, and the W-CDMA base station 20
- the search time of the cell 21 is set, and the cell 11 and the cell 21 are searched.
- step S108 the HSS 140 transmits a cell search time distribution ratio response including the cell search time distribution ratio information to the W-CDMA base station 20-2.
- W-CDMA base station 20-2 receives the cell search time allocation ratio response.
- the HSS 140 searches the cell 21 configured by the LTE base station 10 and the cell 21 configured by the W-CDMA base station 20.
- a ratio (cell search time distribution ratio) to the time to be calculated is calculated, and a cell search time distribution ratio response including the cell search time distribution ratio is transmitted to UE 200.
- the UE 200 receives the cell search time distribution ratio response, the UE 200 searches the cell 11 and the cell 21 with the cell search time distribution ratio included in the cell search time distribution ratio response.
- the cell search time can be changed for each LTE and W-CDMA communication method, and efficient cell search becomes possible.
- the ratio of the time for searching for the cell 11 and the time for searching for the cell 21 is calculated according to the ratio of the SINR of the radio signal from the LTE base station 10 and the SINR of the radio signal from W-CDMA in the UE 200. it can.
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Abstract
Description
図1は、本実施形態に係る無線通信システムの概略構成図である。図1に示す無線通信システム1は、LTE(Long Term Evolution)の通信方式に対応する無線通信システムと、W-CDMA(Wideband Code Division Multiple Access)に対応する無線通信システムとにより構成される。
図3は、HSS140の構成を示す図である。図3に示すHSS140は、制御部141、記憶部142、I/F部143を含む。
図4は、UE200-1及びUE200-2の構成を示す図である。図4に示すUE200-1及びUE200-2は、制御部202、記憶部203、無線通信部206及びアンテナ208を含む。
次に、セルサーチ時間配分比率に関わる処理について説明する。
HSS140の制御部141は、セルサーチ時間配分比率の算出に用いる領域(算出用領域)を、以下の第1の処理又は第2の処理の何れかによって設定する。
HSS140の制御部141は、UE200の現在位置であるPdを先端とし、この先端からの速度ベクトルVcdで左右対称となるような扇形の領域を、算出用領域に設定する。
HSS140の制御部141は、UE200の現在位置であるPdと速度ベクトルVcdにより、所定時間後のUE200の移動先の位置を推定する。具体的には、HSS140の制御部141は、Pdから速度ベクトルVcdの方向であって、且つ、所定時間に速度ベクトルVcdの大きさを乗じた値だけ離れた位置を、所定時間後のUE200の移動先の位置とする。
図6は、無線通信システム1の動作を示すシーケンス図である。
本実施形態に係る無線通信システム1において、HSS140は、LTE基地局10によって構成されるセル11をサーチする時間と、W-CDMA基地局20によって構成されるセル21をサーチする時間との比率(セルサーチ時間配分比率)算出し、当該セルサーチ時間配分比率を含んだセルサーチ時間配分比率応答をUE200へ送信する。UE200は、セルサーチ時間配分比率応答を受信すると、当該セルサーチ時間配分比率応答に含まれるセルサーチ時間配分比率で、セル11とセル21とをサーチする。
上記のように、本発明は実施形態によって記載したが、この開示の一部をなす論述及び図面はこの発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施形態、実施例及び運用技術が明らかとなる。
Claims (9)
- ネットワーク装置と無線端末とを有し、異なる通信エリアを構成する複数の通信方式により、無線端末による無線通信を可能とする無線通信システムであって、
前記ネットワーク装置は、前記複数の通信方式毎の通信エリアを探索する時間の比率を示す探索比率情報を前記無線端末に送信し、
前記無線端末は、前記探索比率情報を受信し、当該探索比率情報に従って、前記複数の通信方式に対応する通信エリアを探索する無線通信システム。 - 前記ネットワーク装置は、所定の領域における前記複数の通信方式毎の通信品質に関する指標に基づいて、前記複数の通信方式毎の通信エリアを探索する時間の比率である探索比率を算出する請求項1に記載の無線通信システム。
- 前記ネットワーク装置は、前記通信品質に関する指標が高い通信方式ほど、対応する探索比率を多くし、前記通信品質に関する指標が少ない通信方式ほど、対応する探索比率を少なくする請求項2に記載の無線通信システム。
- 所定の領域における前記複数の通信方式毎の通信品質に関する指標は、前記所定の領域に設置された前記複数の通信方式毎の無線基地局の数である請求項2に記載の無線通信システム。
- 前記ネットワーク装置は、前記無線端末の移動方向を推定し、推定結果に応じて、前記複数の通信方式毎の探索比率を算出する請求項1に記載の無線通信システム。
- 前記ネットワーク装置は、前記無線端末の移動先と推定される位置の周辺の通信エリアの情報に基づいて、前記複数の通信方式毎の探索比率を算出する請求項1に記載の無線通信システム。
- 異なる通信エリアを構成する複数の通信方式により、無線端末による無線通信を可能とする無線通信システムを管理するネットワーク装置であって、
複数の通信方式毎の通信エリアを探索する時間の比率を示す探索比率情報を前記無線端末に送信するネットワーク装置。 - 異なる通信エリアを構成する複数の通信方式により無線通信が可能な無線端末であって、
複数の通信方式毎の通信エリアを探索する時間の比率を示す探索比率情報を受信し、
前記探索比率情報に従って、前記複数の通信方式に対応する通信エリアを探索する無線端末。 - ネットワーク装置と無線端末とを有し、異なる通信エリアを構成する複数の通信方式により、無線端末による無線通信を可能とする無線通信システムにおける通信制御方法であって、
前記ネットワーク装置が、前記複数の通信方式毎の通信エリアを探索する時間の比率を示す探索比率情報を前記無線端末に送信するステップと、
前記無線端末が、前記探索比率情報を受信し、当該探索比率情報に従って、前記複数の通信方式に対応する通信エリアを探索するステップと
を含む通信制御方法。
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JP2013508948A JP5711358B2 (ja) | 2011-04-06 | 2012-04-06 | 無線通信システム、ネットワーク装置、無線端末及び通信制御方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014115786A1 (ja) * | 2013-01-25 | 2014-07-31 | シャープ株式会社 | 移動体通信システム、通信方法、および基地局装置 |
US10045285B2 (en) * | 2012-12-26 | 2018-08-07 | Huawei Technologies Co., Ltd. | Wireless local area network access point search method, apparatus, and system |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9474530B2 (en) * | 2013-03-14 | 2016-10-25 | C.R. Bard, Inc. | Handling of fasteners within a surgical instrument |
US9427230B2 (en) * | 2013-03-14 | 2016-08-30 | C.R. Bard, Inc. | Handling of fasteners within a surgical instrument |
KR102234740B1 (ko) * | 2014-07-04 | 2021-04-02 | 삼성전자주식회사 | 셀룰러 통신 시스템에서 셀 탐색 방법 및 장치 |
KR20200135176A (ko) * | 2019-05-23 | 2020-12-02 | 현대자동차주식회사 | 단말의 이동에 따른 엣지 트랜스퍼를 제공하는 방법 및 장치 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007124410A (ja) * | 2005-10-28 | 2007-05-17 | Kyocera Corp | 無線端末装置及び無線通信方法 |
WO2008108252A1 (ja) * | 2007-02-27 | 2008-09-12 | Kyocera Corporation | 無線通信端末および圏内復帰処理方法 |
JP2010034640A (ja) * | 2008-07-25 | 2010-02-12 | Nec Corp | 携帯通信端末、携帯通信システム、および基地局探索方法 |
JP2010074516A (ja) * | 2008-09-18 | 2010-04-02 | Toshiba Corp | 無線通信システムおよび移動無線端末装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101569221B (zh) * | 2006-11-17 | 2012-08-22 | 诺基亚公司 | 使用动态参数提供系统选择的方法和设备 |
US20090005041A1 (en) * | 2007-06-28 | 2009-01-01 | Motorola, Inc. | Dynamic network selection by a wireless device |
JP5303331B2 (ja) | 2009-03-26 | 2013-10-02 | 京セラ株式会社 | 無線端末及び無線通信方法 |
-
2012
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007124410A (ja) * | 2005-10-28 | 2007-05-17 | Kyocera Corp | 無線端末装置及び無線通信方法 |
WO2008108252A1 (ja) * | 2007-02-27 | 2008-09-12 | Kyocera Corporation | 無線通信端末および圏内復帰処理方法 |
JP2010034640A (ja) * | 2008-07-25 | 2010-02-12 | Nec Corp | 携帯通信端末、携帯通信システム、および基地局探索方法 |
JP2010074516A (ja) * | 2008-09-18 | 2010-04-02 | Toshiba Corp | 無線通信システムおよび移動無線端末装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10045285B2 (en) * | 2012-12-26 | 2018-08-07 | Huawei Technologies Co., Ltd. | Wireless local area network access point search method, apparatus, and system |
WO2014115786A1 (ja) * | 2013-01-25 | 2014-07-31 | シャープ株式会社 | 移動体通信システム、通信方法、および基地局装置 |
JP2014143651A (ja) * | 2013-01-25 | 2014-08-07 | Sharp Corp | 移動体通信システム、通信方法、および基地局装置 |
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