JP2011182002A - Radio communication system and mobile station - Google Patents

Radio communication system and mobile station Download PDF

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JP2011182002A
JP2011182002A JP2010041421A JP2010041421A JP2011182002A JP 2011182002 A JP2011182002 A JP 2011182002A JP 2010041421 A JP2010041421 A JP 2010041421A JP 2010041421 A JP2010041421 A JP 2010041421A JP 2011182002 A JP2011182002 A JP 2011182002A
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base station
station
wireless communication
transmission power
route
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Yasuyuki Nose
泰行 能勢
Tomoichi Hamada
倫一 濱田
Ryoji Hirai
亮次 平井
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Mitsubishi Electric Corp
Willcom Inc
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Willcom Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system capable of controlling an optimal uplink TCCH (Timing Correct Channel) transmission power, regardless of a communication path of a downlink CCH (Control Channel) received by a mobile station during terminal registration of the mobile station, and provide the mobile station. <P>SOLUTION: In the radio communication system, each of mobile stations 2 and 3 has a route determination means and a power control means. In the time of terminal registration of the own station to the radio communication system, the route determination means determines whether a first route for direct radio communication between a base station 1 and the own station or a second route for radio communication between the base station 1 and the own station through a different cycle non-regeneration repeater 10 is used based on a received frequency. The power control means performs a first control in the case of the first route or performs a second control in the case of the second route. Wherein, the first control is control of transmission power corresponding to the first route, and the second control is control of transmission power corresponding to the second route. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、通信方式にＯＦＤＭＡ（Ｏｒｔｈｏｇｏｎａｌ Ｆｒｅｑｕｅｎｃｙ Ｄｉｖｉｓｉｏｎ Ｍｕｌｔｉｐｌｅ Ａｃｃｅｓｓ）／ＴＤＤ（Ｔｉｍｅ Ｄｉｖｉｓｉｏｎ Ｄｕｐｌｅｘ）方式を採用する次世代ＰＨＳ（Ｐｅｒｓｏｎａｌ Ｈａｎｄｙｐｈｏｎｅ Ｓｙｓｔｅｍ）システムである無線通信システムに関し、特に、異周波非再生中継送受信装置を導入した無線通信システムおよび移動局に関する。   The present invention relates to a radio frequency communication system that is a next-generation PHS (Personal Handyphone System) system that employs an OFDMA (Orthogonal Frequency Division Multiple Access) / TDD (Time Division Duplex) system, and more particularly to a radio frequency non-regenerative radio communication system. The present invention relates to a radio communication system and a mobile station in which the apparatus is introduced.

次世代ＰＨＳシステム（以下、ＸＧＰ（ｅＸｔｅｎｄｅｄ Ｇｌｏｂａｌ Ｐｌａｔｆｏｒｍ）（登録商標）システムとする）では、基地局と移動局との間で通信を行うために用いられている制御用チャネル（以下、ＣＣＨ（Ｃｏｎｔｒｏｌ Ｃｈａｎｎｅｌ）とする）が定義されている（例えば、非特許文献１参照）。   In a next-generation PHS system (hereinafter referred to as an XGP (eXtended Global Platform) (registered trademark) system), a control channel (hereinafter referred to as CCH (Control)) used for communication between a base station and a mobile station. (Refer to Non-Patent Document 1).

ＣＣＨは、タイミング補正チャネル（以下、ＴＣＣＨ（Ｔｉｍｉｎｇ ＣｏｒｒｅｃｔＣｈａｎｎｅｌ）とする）と、共通制御チャネル（以下、ＣＣＣＨ（Ｃｏｍｍｏｎ Ｃｏｎｔｒｏｌ Ｃｈａｎｎｅｌ）とする）とに分別される。また、ＣＣＣＨには、報知用チャネル（以下、ＢＣＣＨ（Ｂｒｏａｄｃａｓｔ Ｃｏｎｔｒｏｌ Ｃｈａｎｎｅｌ）とする）、着信情報チャネル（以下、ＰＣＨ（Ｐａｇｉｎｇ Ｃｈａｎｎｅｌ）とする）、チャネル割当制御チャネル（以下、ＳＣＣＨ（Ｓｉｇｎａｌｉｎｇ Ｃｏｎｔｒｏｌ Ｃｈａｎｎｅｌ）とする）が含まれる。基地局と移動局との間で無線通信を行う際において、初めに移動局の登録（以下、端末登録とする）が行われる。   The CCH is classified into a timing correction channel (hereinafter referred to as TCCH (Timing Correct Channel)) and a common control channel (hereinafter referred to as CCCH (Common Control Channel)). The CCCH includes a broadcast channel (hereinafter referred to as BCCH (Broadcast Control Channel)), an incoming information channel (hereinafter referred to as PCH (Paging Channel)), a channel assignment control channel (hereinafter referred to as SCCH (Signaling Control Channel)). Included). When performing wireless communication between a base station and a mobile station, registration of the mobile station (hereinafter referred to as terminal registration) is first performed.

移動局では、端末登録開始時の基地局への上りＴＣＣＨ送信電力値（上りＴＣＣＨ初期送信電力値）を決定するために、基地局から受信した下りＣＣＨの受信レベルを測定して基地局と移動局との間における電波の伝播損失を推定し、当該伝播損失に基づいて基地局にて所定の品質を満たすような上りＴＣＣＨ送信電力値を決定するオープンループ制御による送信電力制御方式が採用されている。ここで、「上り」とは移動局から基地局への信号送信方向のこととし、「下り」とは基地局から移動局への信号送信方向のこととする。   In the mobile station, in order to determine the uplink TCCH transmission power value (uplink TCCH initial transmission power value) to the base station at the start of terminal registration, the mobile station moves with the base station by measuring the reception level of the downlink CCH received from the base station. A transmission power control method based on open loop control is adopted in which the propagation loss of radio waves with a station is estimated and an uplink TCCH transmission power value that satisfies a predetermined quality is determined at the base station based on the propagation loss. Yes. Here, “uplink” is the signal transmission direction from the mobile station to the base station, and “downlink” is the signal transmission direction from the base station to the mobile station.

例えば、端末登録時に移動局から基地局に対してＴＣＣＨを送信する場合において、移動局は基地局から下りＣＣＨを受信し、受信した下りＣＣＨの受信電界強度を測定して伝播損失を推定する。そして、基地局にて所定の品質を満たす上りＴＣＣＨ送信電力と伝播損失とから上りＴＣＣＨを決定して送信する。また、移動局が上りＴＣＣＨに対する基地局からの応答を受信しなかった場合は、上りＴＣＣＨ送信電力の決定に失敗した（上りＴＣＣＨを基地局にて受信できなかった）と判断し、基地局に対してＴＣＣＨを再送信する。   For example, when transmitting a TCCH from the mobile station to the base station at the time of terminal registration, the mobile station receives the downlink CCH from the base station, and measures the received electric field strength of the received downlink CCH to estimate the propagation loss. Then, the uplink TCCH is determined and transmitted from the uplink TCCH transmission power and the propagation loss satisfying the predetermined quality at the base station. If the mobile station does not receive a response from the base station to the uplink TCCH, it is determined that the uplink TCCH transmission power has failed to be determined (the uplink TCCH was not received by the base station), and the base station Retransmit TCCH.

また、移動局を屋内で使用する場合において、基地局から送信された電波が建物等の壁によって減衰し、十分な受信電界強度が得られずに安定した無線通信ができない不感地帯が存在する。このような不感地帯で基地局と無線通信を行うために、基地局から送信された電波の受信が可能な建物の窓際等に中継送受信装置を設置する方法がある。中継送受信装置は、「上り」および「下り」双方向の信号を中継する際に信号を適切な利得で増幅することによって、基地局と移動局とが互いに良好な通信を行うようにしている。   In addition, when the mobile station is used indoors, there is a dead zone where radio waves transmitted from the base station are attenuated by a wall such as a building and stable radio communication cannot be performed without obtaining a sufficient received electric field strength. In order to perform wireless communication with a base station in such a dead zone, there is a method of installing a relay transmission / reception device at the window of a building where radio waves transmitted from the base station can be received. The relay transmission / reception apparatus amplifies the signal with an appropriate gain when relaying the “uplink” and “downlink” bidirectional signals, so that the base station and the mobile station perform good communication with each other.

ＴＤＤ方式を採用している無線通信システムでは、下り方向および上り方向の双方向で同一の周波数帯を使用しており、下り方向と上り方向とを時分割多重している。そのため、中継送受信装置は、下り方向と上り方向とのデータフレームを認識して分離するためにフレーム同期が必要である。   In a wireless communication system employing the TDD scheme, the same frequency band is used in both the downlink and uplink directions, and the downlink and uplink directions are time-division multiplexed. For this reason, the relay transmission / reception apparatus needs frame synchronization in order to recognize and separate data frames in the downlink direction and the uplink direction.

フレーム同期の方法には、再生中継方式と非再生中継方式とが考えられる。再生中継方式は、受信した下り方向および上り方向の信号をそれぞれ完全に復調してリタイミングした後に送信する方式であるが、中継送受信装置の基地局側および移動局側のそれぞれでＰＨＹ（Ｐｈｙｓｉｃａｌ ｌａｙｅｒ）を終端するため、回路規模が大きくなって消費電力も高くなってしまう。一方、非再生中継方式は、中継送受信装置の基地局側および移動局側のそれぞれでＰＨＹを終端しないため、再生中継方式のような問題は生じない。   As a frame synchronization method, a regenerative relay system and a non-regenerative relay system are conceivable. The regenerative relay scheme is a scheme in which the received downlink and uplink signals are completely demodulated and re-timed before being transmitted. However, the PHY (Physical layer) is transmitted on each of the base station side and the mobile station side of the relay transceiver apparatus. ) Is terminated, the circuit scale increases and the power consumption also increases. On the other hand, the non-regenerative relay system does not terminate the PHY on the base station side and the mobile station side of the relay transmission / reception apparatus, and thus does not cause a problem like the regenerative relay system.

中継送受信装置と移動局との間の無線通信に用いられる周波数には、基地局と中継送受信装置との間の無線通信に用いられる周波数と同一の周波数を用いる周波数無変換方式と、基地局と中継送受信装置との間の無線通信に用いられる周波数とは異なる周波数を用いる周波数変換方式とが考えられる。無変換方式では、中継送受信装置の内部で周波数の干渉が生じるため対策が必要となる。ＸＧＰシステムにおいて、下り方向および上り方向の双方向ともアンテナ利得が４ｄＢｉと定められている（例えば、非特許文献１参照）。そのため、アンテナパターンの指向性が十分ではなく、アイソレーションをとるためには中継送受信装置の構造が複雑化、大型化、重量化して、高コストになるという問題がある。従って、中継送受信装置をＸＧＰシステムで用いる場合は、周波数変換方式が適している。   The frequency used for radio communication between the relay transmission / reception device and the mobile station includes a frequency non-conversion method using the same frequency as the frequency used for radio communication between the base station and the relay transmission / reception device, A frequency conversion method using a frequency different from the frequency used for the wireless communication with the relay transmission / reception apparatus can be considered. The non-conversion method requires countermeasures because frequency interference occurs inside the relay transmitting / receiving apparatus. In the XGP system, the antenna gain is determined to be 4 dBi in both the downlink and uplink directions (see, for example, Non-Patent Document 1). Therefore, the directivity of the antenna pattern is not sufficient, and there is a problem that the structure of the relay transmission / reception apparatus becomes complicated, large, and heavy in order to achieve isolation, resulting in high costs. Therefore, when the relay transmitting / receiving apparatus is used in the XGP system, the frequency conversion method is suitable.

以上のことから、ＸＧＰシステムに導入される中継送受信装置としては、異周波非再生中継送受信装置（以下、異周波非再生レピータとする）が最適であると考えられる。   From the above, it is considered that a different frequency non-regenerative repeater transmission / reception device (hereinafter referred to as a different frequency non-regenerative repeater) is optimal as a relay transmission / reception device introduced into the XGP system.

「ＯＦＤＭＡ／ＴＤＭＡ ＴＤＤ Ｂｒｏａｄｂａｎｄ Ｗｉｒｅｌｅｓｓ Ａｃｃｅｓｓ Ｓｙｓｔｅｍ（Ｎｅｘｔ Ｇｅｎｅｒａｔｉｏｎ ＰＨＳ），ＡＲＩＢ ＳＴＡＮＤＡＲＤ，ＡＲＩＢ ＳＴＤ−Ｔ９５ Ｖｅｒｓｉｏｎ １．２」、Ａｓｓｏｃｉａｔｉｏｎ ｏｆ Ｒａｄｉｏ Ｉｎｄｕｓｔｒｉｅｓ ａｎｄ Ｂｕｓｉｎｅｓｓｅｓ、２００９年３月１８日“OFDMA / TDMA TDD Broadband Wireless Access System (Next Generation PHS), ARIB STANDARD, ARIB STD-T95 Version 1.2”, Association of Radio Industries, Month of the Year, 19th of August

しかし、異周波非再生レピータが導入されたＸＧＰシステムには次のような問題がある。   However, the XGP system in which the different frequency non-reproducing repeater is introduced has the following problems.

異周波非再生レピータは、基地局と移動局との間の無線通信における送信電力制御に影響を与えないようにするために、異周波非再生レピータの送信電力の上限を移動局の送信電力の上限に規定する必要がある。このような異周波非再生レピータにおいて、下り方向の中継利得と同様の利得を上り方向に適用すると、基地局と異周波非再生レピータとの距離が比較的近いところで遠近問題が生じてしまう。従って、異周波非再生レピータにおいて、下り方向の中継利得と上り方向の中継利得とを同一にすることができないという問題がある。   The different frequency non-regenerative repeater sets the upper limit of the transmission power of the different frequency non-regenerative repeater to the transmission power of the mobile station so as not to affect the transmission power control in the wireless communication between the base station and the mobile station. It is necessary to stipulate an upper limit. In such a different frequency non-reproducing repeater, when a gain similar to the downlink relay gain is applied in the upstream direction, a perspective problem occurs when the distance between the base station and the different frequency non-reproducing repeater is relatively short. Therefore, in the different frequency non-reproducing repeater, there is a problem that the downstream relay gain and the upstream relay gain cannot be made the same.

また、基地局と異周波非再生レピータとの距離に関わらず、異周波非再生レピータの下り方向の中継利得によって、異周波非再生レピータから送信される下り方向の送信電力は一定となる。そのため、移動局は、受信した下りＣＣＨの受信電界強度から基地局と移動局との伝播損失を推定しているため、基地局と移動局との間の伝播損失が基地局と異周波非再生レピータとの距離に関わらず同一であると認識する。従って、基地局と異周波非再生レピータとの距離が遠くなるほど、基地局で上りＴＣＣＨを受信するための電力（すなわち、移動局から送信されるＴＣＣＨ送信電力）が不足してしまい、基地局は上りＴＣＣＨを受信できなくなってしまう。   Also, regardless of the distance between the base station and the different frequency non-reproducing repeater, the downstream transmission power transmitted from the different frequency non-reproducing repeater is constant due to the downstream relay gain of the different frequency non-reproducing repeater. Therefore, since the mobile station estimates the propagation loss between the base station and the mobile station from the received field strength of the received downlink CCH, the propagation loss between the base station and the mobile station is different from that of the base station. Recognize that they are the same regardless of the distance to the repeater. Therefore, as the distance between the base station and the different frequency non-reproducing repeater increases, the power for receiving the uplink TCCH at the base station (that is, the TCCH transmission power transmitted from the mobile station) becomes insufficient. The uplink TCCH cannot be received.

基地局が上りＴＣＣＨを受信できなくなると、移動局は上りＴＣＣＨに対する応答を基地局から受信できないため、上りＴＣＣＨ送信電力を調整して基地局への再送信を試みる。しかし、異周波非再生レピータから移動局への下り送信電力が一定であるため、調整後の上りＴＣＣＨ送信電力は調整前の上りＴＣＣＨ送信電力と同じになってしまい、何度再送信しても基地局が上りＴＣＣＨを受信できずに端末登録に失敗するという問題が生じる。   When the base station becomes unable to receive the uplink TCCH, the mobile station cannot receive a response to the uplink TCCH from the base station, and therefore adjusts the uplink TCCH transmission power and attempts retransmission to the base station. However, since the downlink transmission power from the different frequency non-reproducing repeater to the mobile station is constant, the adjusted uplink TCCH transmission power is the same as the uplink TCCH transmission power before adjustment, There arises a problem that the base station fails to receive the uplink TCCH and fails in terminal registration.

また、異周波非再生レピータを導入したＸＧＰシステムに小セル用基地局を設置した場合において、移動局は、小セル用基地局から直接的に受信した信号の周波数と、屋外の基地局から異周波非再生レピータを経由して受信した信号の周波数とが同一周波数となるため、どの基地局から送信されてきた信号なのか判断できない。すなわち、通信経路の判別ができない。従って、移動局は、小セル用基地局から直接的に受信した下りＣＣＨに対する上りＴＣＣＨ送信電力の制御と、屋外の基地局から異周波非再生レピータを経由して受信した下りＣＣＨに対する上りＴＣＣＨ送信電力の制御とが同じになってしまい、各下りＣＣＨに対して最適な上りＴＣＣＨ送信電力の制御ができないという問題がある。なお、屋外に設置され通信エリアが比較的広い基地局を「基地局」、屋内などの不感地帯に設置され通信エリアが基地局よりも狭いエリアの基地局を「小セル用基地局」とする。   In addition, when a small cell base station is installed in an XGP system in which a different frequency non-reproducing repeater is introduced, the mobile station differs from the frequency of the signal received directly from the small cell base station and from the outdoor base station. Since the frequency of the signal received via the frequency non-reproducing repeater is the same frequency, it cannot be determined from which base station the signal is transmitted. That is, the communication path cannot be determined. Therefore, the mobile station controls the uplink TCCH transmission power for the downlink CCH received directly from the small cell base station, and the uplink TCCH transmission for the downlink CCH received from the outdoor base station via the different frequency non-regenerative repeater. The power control becomes the same, and there is a problem that the optimal uplink TCCH transmission power cannot be controlled for each downlink CCH. Base stations that are installed outdoors and have a relatively large communication area are referred to as “base stations”, and base stations that are installed in dead zones such as indoors and have a communication area that is narrower than base stations are referred to as “small cell base stations”. .

本発明は、これらの問題を解決するためになされたものであり、移動局が自局の端末登録時において、自局が受信した下りＣＣＨの通信経路に関わらず、最適な上りＴＣＣＨ送信電力を制御することが可能な無線通信システムおよび移動局を提供することを目的とする。   The present invention has been made in order to solve these problems. When a mobile station registers its own terminal, the optimal uplink TCCH transmission power is obtained regardless of the communication path of the downlink CCH received by the mobile station. An object is to provide a wireless communication system and a mobile station that can be controlled.

上記の課題を解決するために、本発明による無線通信システムは、基地局と、基地局と無線通信を行う移動局と、基地局と移動局との間の無線通信を補助するために配置され、基地局との間における無線通信の周波数と、移動局との間における無線通信の周波数とが異なるように、無線通信を中継する中継送受信装置とを備える無線通信システムであって、移動局は、無線通信システムへの自局の端末登録時において、受信周波数に基づいて、基地局と自局との間で直接的に無線通信を行う第１の経路か、または、中継送受信装置を介して基地局と自局との間で無線通信を行う第２の経路かの経路判定を行う経路判定手段と、第１の経路の場合は当該第１の経路に対応した送信電力の制御である第１の制御を行い、第２の経路の場合は当該第２の経路に対応した送信電力の制御である第２の制御を行う電力制御手段とを備えることを特徴とする。   In order to solve the above problems, a wireless communication system according to the present invention is arranged to assist a base station, a mobile station that performs wireless communication with the base station, and wireless communication between the base station and the mobile station. A wireless communication system including a relay transmission / reception device that relays wireless communication so that a frequency of wireless communication with a base station is different from a frequency of wireless communication with a mobile station, At the time of registration of the terminal of the own station to the radio communication system, based on the reception frequency, the first path for performing radio communication directly between the base station and the own station, or via a relay transmission / reception device Route determination means for determining the route of the second route for performing wireless communication between the base station and the own station, and in the case of the first route, the transmission power is controlled corresponding to the first route. 1 control, and in the case of the second route, Characterized in that it comprises a power control means for performing a second control is a control of the transmission power corresponding to the path of the.

本発明によると、移動局は、無線通信システムへの自局の端末登録時において、受信周波数に基づいて、基地局と自局との間で直接的に無線通信を行う第１の経路か、または、中継送受信装置を介して基地局と自局との間で無線通信を行う第２の経路かの経路判定を行う経路判定手段と、第１の経路の場合は当該第１の経路に対応した送信電力の制御である第１の制御を行い、第２の経路の場合は当該第２の経路に対応した送信電力の制御である第２の制御を行う電力制御手段とを備えるため、移動局の端末登録時において、移動局が受信した下りＣＣＨの通信経路に関わらず、最適な上りＴＣＣＨ送信電力を制御することが可能となる。   According to the present invention, when the mobile station registers its own terminal in the wireless communication system, the mobile station directly performs wireless communication between the base station and the local station based on the received frequency. Or a route determination means for determining a route of the second route for performing wireless communication between the base station and the own station via the relay transmission / reception device, and in the case of the first route, corresponds to the first route Power control means for performing the first control that is the control of the transmission power, and in the case of the second route, the power control means for performing the second control that is the control of the transmission power corresponding to the second route. It is possible to control the optimal uplink TCCH transmission power regardless of the downlink CCH communication path received by the mobile station at the time of terminal registration of the station.

本発明の実施形態１によるＸＧＰシステムの構成図である。It is a block diagram of the XGP system by Embodiment 1 of this invention. 本発明の実施形態１による移動局における端末登録時のシーケンスの一例を示す図である。It is a figure which shows an example of the sequence at the time of the terminal registration in the mobile station by Embodiment 1 of this invention. 本発明の実施形態１による移動局における端末登録時の上りＴＣＣＨ送信電力制御のフローチャートである。4 is a flowchart of uplink TCCH transmission power control at the time of terminal registration in a mobile station according to Embodiment 1 of the present invention. 本発明の実施形態１による基地局配下の移動局における端末登録時の上りＴＣＣＨ送信電力決定のフローチャートである。7 is a flowchart of determining uplink TCCH transmission power at the time of terminal registration in a mobile station under a base station according to Embodiment 1 of the present invention. 本発明の実施形態１による異周波非再生レピータ配下の移動局における端末登録時の上りＴＣＣＨ送信電力決定のフローチャートである。It is a flowchart of uplink TCCH transmission power determination at the time of terminal registration in a mobile station under a different frequency non-reproducing repeater according to Embodiment 1 of the present invention. 本発明の実施形態２によるＸＧＰシステムの構成図である。It is a block diagram of the XGP system by Embodiment 2 of this invention. 本発明の実施形態２による移動局における受信信号経路判定のフローチャートである。It is a flowchart of the received signal path | route determination in the mobile station by Embodiment 2 of this invention.

本発明の実施形態について、図面を用いて以下に説明する。   Embodiments of the present invention will be described below with reference to the drawings.

〈実施形態１〉
図１は、本発明の実施形態１によるＸＧＰシステムの構成図である。図１に示すように、本発明によるＸＧＰシステム（無線通信システム）は、基地局１と、基地局１と無線通信を行う移動局２，３ａ，３ｂと、異周波非再生レピータ１０（中継送受信装置）とを備えている。異周波非再生レピータ１０は、基地局側アンテナ１１と端末側アンテナ１２とを備えており、基地局１から送信された電波が十分に届かない屋内等の不感地帯（シャドウィング領域）４に存在する移動局３ａ，３ｂと基地局１との無線通信を補助するために配置され、当該無線通信を中継する。以下、特別な断りがない限り、移動局３ａ，３ｂを単に移動局３とする。 <Embodiment 1>
FIG. 1 is a configuration diagram of an XGP system according to Embodiment 1 of the present invention. As shown in FIG. 1, an XGP system (wireless communication system) according to the present invention includes a base station 1, mobile stations 2, 3a, 3b that perform wireless communication with the base station 1, and a different frequency non-regenerative repeater 10 (relay transmission / reception). Device). The different frequency non-reproducing repeater 10 includes a base station side antenna 11 and a terminal side antenna 12 and is present in a dead zone (shadowing region) 4 such as an indoor area where radio waves transmitted from the base station 1 do not reach sufficiently. The mobile stations 3a and 3b and the base station 1 are arranged to assist the wireless communication and relay the wireless communication. Hereinafter, the mobile stations 3a and 3b are simply referred to as the mobile station 3 unless otherwise specified.

移動局２は、基地局１との間で直接的に無線通信を行う、基地局１配下に属する移動局である。移動局２は、基地局１から送信された周波数ｆ１の信号を受信し（下り受信）、周波数ｆ１の信号を基地局に送信する（上り送信）。   The mobile station 2 is a mobile station belonging to the base station 1 that directly performs wireless communication with the base station 1. The mobile station 2 receives the signal of the frequency f1 transmitted from the base station 1 (downlink reception), and transmits the signal of the frequency f1 to the base station (uplink transmission).

移動局３は、基地局１とは直接的に無線通信を行わず、異周波非再生レピータ１０を介して基地局１との間で無線通信を行う、異周波非再生レピータ１０配下に属する移動局である。異周波非再生レピータ１０は、基地局１から送信された周波数ｆ１の信号を受信し（下り受信）、受信した周波数ｆ１の信号を例えば別の周波数ｆ２に変換して移動局３に送信する（下り送信）。また、移動局３から送信された周波数ｆ２の信号を受信し（上り受信）、受信した周波数ｆ２の信号を周波数ｆ１に変換して基地局１に送信する（上り送信）。このように、異周波非再生レピータ１０では、ダウンリンク（下り回線）では下り受信および下り送信を行い、アップリンク（上り回線）では上り受信および上り送信を行う。すなわち、異周波非再生レピータ１０は、基地局１との間における無線通信の周波数と、移動局３との間における無線通信の周波数とが異なるように無線通信を中継している。   The mobile station 3 does not perform radio communication directly with the base station 1 but performs radio communication with the base station 1 via the different frequency non-reproducing repeater 10 and belongs to the sub-frequency non-reproducing repeater 10. Station. The different frequency non-reproducing repeater 10 receives the signal of the frequency f1 transmitted from the base station 1 (downlink reception), converts the received signal of the frequency f1 into, for example, another frequency f2 and transmits it to the mobile station 3 ( Downlink transmission). Further, it receives a signal of frequency f2 transmitted from mobile station 3 (uplink reception), converts the received signal of frequency f2 to frequency f1 and transmits it to base station 1 (uplink transmission). In this way, the different frequency non-reproducing repeater 10 performs downlink reception and downlink transmission on the downlink (downlink), and performs uplink reception and uplink transmission on the uplink (uplink). That is, the different frequency non-reproducing repeater 10 relays wireless communication so that the frequency of wireless communication with the base station 1 is different from the frequency of wireless communication with the mobile station 3.

図２は、本発明の実施形態１による移動局２，３における端末登録時のシーケンスの一例を示す図である。図２に示すように、移動局（ＭＳ：Ｍｏｂｉｌｅ Ｓｔａｔｉｏｎ）２，３は、Ｉｄｌｅの状態から起動した後に、基地局（ＢＳ：Ｂａｓｅ Ｓｔａｔｉｏｎ）１から周期的に送信されるＢＣＣＨを受信する。移動局２，３は端末登録時において、受信したＢＣＣＨに基づいてＴＣＣＨ（ＬＣＨ割当要求）を基地局１に送信し、基地局１からＳＣＣＨ（ＬＣＨ割当応答）を受信する。次に、移動局２，３はＩＣＣＨ（無線リンク設定要求）を基地局１に送信し、基地局１からＩＣＣＨ（無線リンク設定応答）を受信する。その後、移動局２，３はＩＣＣＨ（拡張機能要求）を基地局１に送信し、基地局１からＩＣＣＨ（拡張機能応答）を受信する。そして、移動局２，３と基地局１との間で認証シーケンスを行った後に無線通信を開始する。   FIG. 2 is a diagram showing an example of a sequence at the time of terminal registration in the mobile stations 2 and 3 according to Embodiment 1 of the present invention. As illustrated in FIG. 2, mobile stations (MS: Mobile Station) 2 and 3 receive BCCHs periodically transmitted from a base station (BS: Base Station) 1 after being activated from an idle state. At the time of terminal registration, the mobile stations 2 and 3 transmit a TCCH (LCH allocation request) to the base station 1 based on the received BCCH, and receive an SCCH (LCH allocation response) from the base station 1. Next, the mobile stations 2 and 3 transmit ICCH (radio link setting request) to the base station 1 and receive ICCH (radio link setting response) from the base station 1. Thereafter, the mobile stations 2 and 3 transmit ICCH (extended function request) to the base station 1 and receive ICCH (extended function response) from the base station 1. Then, after performing an authentication sequence between the mobile stations 2 and 3 and the base station 1, wireless communication is started.

図３は、本発明の実施形態１による移動局２，３における端末登録時の上りＴＣＣＨ送信電力制御のフローチャートである。図３に示すように、移動局２，３の端末登録が開始されると（ステップＳ３０１）、受信したＣＣＨの周波数帯域が異周波非再生レピータ１０を経由したものかどうかを判断する（経路判定手段）（ステップＳ３０２）。移動局２，３は、基地局１から直接的に送信されてきたＣＣＨの周波数と、異周波非再生レピータ１０を介して送信されてきたＣＣＨの周波数とから、どの経路で送信されてきたのかを判別することができる。例えば、図１に示すように、移動局２，３が周波数ｆ１のＣＣＨを受信した場合は、基地局１から直接的に送信されてきたＣＣＨであると認識する（第１の経路）。また、移動局２，３が周波数ｆ２のＣＣＨを受信した場合は、異周波非再生レピータ１０を介して送信されてきたＣＣＨであると認識する（第２の経路）。   FIG. 3 is a flowchart of uplink TCCH transmission power control at the time of terminal registration in the mobile stations 2 and 3 according to Embodiment 1 of the present invention. As shown in FIG. 3, when the terminal registration of the mobile stations 2 and 3 is started (step S301), it is determined whether or not the received CCH frequency band has passed through the different frequency non-reproducing repeater 10 (path determination). Means) (step S302). Which path has the mobile stations 2 and 3 transmitted from the CCH frequency transmitted directly from the base station 1 and the CCH frequency transmitted via the different frequency non-reproducing repeater 10? Can be determined. For example, as shown in FIG. 1, when the mobile stations 2 and 3 receive the CCH having the frequency f1, it is recognized as the CCH transmitted directly from the base station 1 (first route). When the mobile stations 2 and 3 receive the CCH having the frequency f2, the mobile stations 2 and 3 recognize that the CCH is transmitted via the different frequency non-reproducing repeater 10 (second route).

ステップＳ３０２において、ＣＣＨの周波数が異周波非再生レピータ１０を経由したものではないと判断すると、図１に示すように、基地局１配下に属する移動局２が周波数ｆ１のＣＣＨを基地局１から直接的に受信したと判断する。   If it is determined in step S302 that the CCH frequency does not pass through the different frequency non-reproducing repeater 10, the mobile station 2 belonging to the base station 1 sends the CCH having the frequency f1 from the base station 1 as shown in FIG. Judge that it was received directly.

次に、移動局２は、基地局１へ送信する上りＴＣＣＨの送信電力を決定する（ステップＳ３０３）。図４は、本発明の実施形態１による基地局１配下の移動局２における端末登録時の上りＴＣＣＨ送信電力決定のフローチャートである。図４のステップＳ４０１〜ステップＳ４０４の処理によって、図３のステップＳ３０３での上りＴＣＣＨ初期送信電力が決定される。基地局１配下の上りＴＣＣＨ送信電力決定の処理が開始されると（ステップＳ４０１）、移動局２は受信したＣＣＨの受信電界強度（以下、ＣＣＨ受信電力とする）を測定し、基地局１のＣＣＨ送信出力値とＣＣＨ受信電力とから基地局１と移動局２（端末）との間における伝播損失を算出する（ステップＳ４０２）。そして、基地局１との無線通信に必要な上りＴＣＣＨターゲット電力（Ｔａｒｇｅｔ＿ＴＣＣＨ［ｄＢｍ］）に伝播損失分の電力を加算したＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］（第１の送信電力）（ステップＳ４０３）を基地局配下上りＴＣＣＨ送信電力として決定して（ステップＳ４０４）基地局１に送信する。なお、移動局２，３は、基地局１のＣＣＨ送信出力値と上りＴＣＣＨターゲット電力とを送信電力パラメータとして所有している。   Next, the mobile station 2 determines the transmission power of the uplink TCCH to be transmitted to the base station 1 (step S303). FIG. 4 is a flowchart of determining the uplink TCCH transmission power at the time of terminal registration in the mobile station 2 under the base station 1 according to Embodiment 1 of the present invention. The uplink TCCH initial transmission power in step S303 in FIG. 3 is determined by the processing in steps S401 to S404 in FIG. When the process of determining the uplink TCCH transmission power under the control of the base station 1 is started (step S401), the mobile station 2 measures the received electric field strength (hereinafter referred to as CCH reception power) of the CCH, A propagation loss between the base station 1 and the mobile station 2 (terminal) is calculated from the CCH transmission output value and the CCH reception power (step S402). Then, TCCH_INI_BS [dBm] (first transmission power) (step S403) obtained by adding the power for the propagation loss to the uplink TCCH target power (Target_TCCH [dBm]) necessary for wireless communication with the base station 1 is controlled by the base station. The uplink TCCH transmission power is determined (step S404) and transmitted to the base station 1. The mobile stations 2 and 3 own the CCH transmission output value of the base station 1 and the uplink TCCH target power as transmission power parameters.

次に、基地局１に送信した上りＴＣＣＨに対する応答（ＳＣＣＨ）を受信したか否かを判断する（ステップＳ３０５）。基地局１から応答を受信した（上りＴＣＣＨの送信が成功した）場合は、図２に示すシーケンスの通り、基地局１に個別制御チャネル（ＩＣＣＨ）を送信して無線リンク（無線回線）の設定要求を行う（ステップＳ３１６）。   Next, it is determined whether a response (SCCH) to the uplink TCCH transmitted to the base station 1 has been received (step S305). When a response is received from the base station 1 (successful transmission of uplink TCCH), the dedicated control channel (ICCH) is transmitted to the base station 1 as shown in the sequence of FIG. A request is made (step S316).

一方、基地局１からの応答を受信できなかった（上りＴＣＣＨ送信後、一定時間が経過しても、上りＴＣＣＨに対する応答を検出しない状況、すなわち、上りＴＣＣＨの送信が失敗した）場合は、ＣＣＨ受信電力と基地局近傍判定閾値受信レベルとを比較し（ステップＳ３０６）、移動局２が基地局１の近傍に存在するか否かを判定する。なお、移動局２，３は、基地局近傍判定閾値受信レベルを送信電力パラメータとして所有している。   On the other hand, in the case where a response from the base station 1 could not be received (a situation in which a response to the uplink TCCH is not detected even after a certain time has elapsed after the uplink TCCH transmission, that is, the uplink TCCH transmission has failed), The received power and the base station proximity determination threshold reception level are compared (step S306), and it is determined whether or not the mobile station 2 exists in the vicinity of the base station 1. The mobile stations 2 and 3 own the base station proximity determination threshold reception level as a transmission power parameter.

ＣＣＨ受信電力が基地局近傍判定閾値受信レベル以下の場合は、移動局２が基地局１の近傍に存在していないと判断する。そして、ステップＳ３０３にて決定した基地局配下上りＴＣＣＨ送信電力であるＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］に、基地局配下上りＴＣＣＨ再送用送信電力制御値であるＴＣＣＨ＿ＯＦＦＳＥＴ＿ＢＳ［ｄＢ］（第１の電力制御値）を加算した電力を上りＴＣＣＨ送信電力として決定して基地局１に送信する（ステップＳ３０７）。なお、移動局２，３は、基地局配下上りＴＣＣＨ再送用送信電力制御値であるＴＣＣＨ＿ＯＦＦＳＥＴ＿ＢＳ［ｄＢ］を送信電力パラメータとして所有している。   When the CCH received power is equal to or lower than the base station proximity determination threshold reception level, it is determined that the mobile station 2 does not exist in the vicinity of the base station 1. Then, TCCH_OFFSET_BS [dB] (first power control value) that is the transmission power control value for retransmission of the base station subordinate TCCH is added to TCCH_INI_BS [dBm] that is the base station subordinate TCCH transmission power determined in step S303. The determined power is determined as the uplink TCCH transmission power and transmitted to the base station 1 (step S307). Note that the mobile stations 2 and 3 have TCCH_OFFSET_BS [dB], which is a transmission power control value for uplink TCCH retransmission under the base station, as a transmission power parameter.

一方、ＣＣＨ受信電力が基地局近傍判定閾値受信レベルより大きい場合は（ステップＳ３０６）、移動局２が基地局１の近傍に存在していると判断する。そして、上りＴＣＣＨ送信電力の制御を行わずに、ステップＳ３０３にて決定した基地局配下上りＴＣＣＨ送信電力であるＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］にて、基地局１に上りＴＣＣＨを送信する。   On the other hand, when the CCH received power is larger than the base station proximity determination threshold reception level (step S306), it is determined that the mobile station 2 exists in the vicinity of the base station 1. Then, without controlling the uplink TCCH transmission power, the uplink TCCH is transmitted to the base station 1 using TCCH_INI_BS [dBm], which is the uplink TCCH transmission power controlled by the base station determined in step S303.

ステップＳ３０５〜ステップＳ３０７の処理を行った後、なおも上りＴＣＣＨに対する基地局１からの応答を移動局２が受信できなかった場合は、リトライ回数カウント値を１ずつアップしながらステップＳ３０４〜ステップＳ３０８の処理を（設定リトライ回数−１）［回］（所定回数）繰り返す。すなわち、移動局２が基地局１の近傍に存在しない場合は基地局配下上りＴＣＣＨ送信電力であるＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］に、基地局配下上りＴＣＣＨ再送用送信電力制御値であるＴＣＣＨ＿ＯＦＦＳＥＴ＿ＢＳ［ｄＢ］を再送信するたびに加算する動作を所定回数繰り返し、移動局２が基地局１の近傍に存在する場合は基地局配下上りＴＣＣＨ送信電力であるＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］で再送信する動作を所定回数繰り返す。   After the processing of step S305 to step S307, if the mobile station 2 still cannot receive a response from the base station 1 to the uplink TCCH, the retry count count value is incremented by one while step S304 to step S308. The above process is repeated (set retry count-1) [times] (predetermined number of times). That is, when the mobile station 2 does not exist in the vicinity of the base station 1, the base station subordinate TCCH transmission power control value for TCCH_INI_BS [dBm] is retransmitted to the base station subordinate TCCH retransmission power control value TCCH_OFFSET_BS [dB]. The operation of adding each time transmission is repeated a predetermined number of times, and when the mobile station 2 exists in the vicinity of the base station 1, the operation of retransmitting with TCCH_INI_BS [dBm], which is the TCCH transmission power subordinate to the base station, is repeated a predetermined number of times.

そして、（設定リトライ回数−１）［回］を超過した場合は、移動局２の端末登録の失敗となる（ステップＳ３０９）。なお、移動局２，３は、端末登録時の上りＴＣＣＨ送信リトライ回数を送信電力パラメータとして所有している。   If (setting retry count-1) [times] is exceeded, terminal registration of the mobile station 2 fails (step S309). Note that the mobile stations 2 and 3 own the number of uplink TCCH transmission retries at the time of terminal registration as a transmission power parameter.

このように、移動局２の電力制御手段は、基地局１と移動局２とが直接的に無線通信を行う経路（第１の経路）に対応した送信電力の制御を行う（第１の制御）。   As described above, the power control means of the mobile station 2 controls transmission power corresponding to a path (first path) in which the base station 1 and the mobile station 2 directly perform wireless communication (first control). ).

また、ステップＳ３０２において、ＣＣＨの周波数が異周波非再生レピータ１０を経由したものであると判断すると、図１に示すように、異周波非再生レピータ１０配下に属する移動局３が周波数ｆ２のＣＣＨを受信したと判断する。   If it is determined in step S302 that the frequency of the CCH passes through the different frequency non-reproducing repeater 10, as shown in FIG. 1, the mobile station 3 belonging to the different frequency non-reproducing repeater 10 controls the CCH having the frequency f2. Is received.

次に、移動局３は、基地局１への上りＴＣＣＨ送信電力を決定する（ステップＳ３１０）。図５は、本発明の実施形態１による異周波非再生レピータ１０配下の移動局３における端末登録時の上りＴＣＣＨ送信電力決定のフローチャートである。図５のステップＳ５０１〜ステップＳ５０４の処理によって、図３のステップＳ３１０での上りＴＣＣＨ送信電力が決定される。異周波非再生レピータ１０配下の上りＴＣＣＨ送信電力決定の処理が開始されると（ステップＳ５０１）、図４のステップＳ４０２、ステップＳ４０３と同様の方法で基地局配下上りＴＣＣＨ送信電力であるＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］（第１の電力）を算出して決定する（ステップＳ５０２）。そして、算出した基地局配下上りＴＣＣＨ送信電力に、異周波非再生レピータ経由送信電力制御値であるＹ＿ＲＳ［ｄＢ］（第２の電力制御値）を加算した電力を上りＴＣＣＨ送信電力として決定し（ステップＳ５０３）、基地局１に送信する（ステップＳ５０４）。なお、移動局２，３は、異周波非再生レピータ経由送信電力制御値であるＹ＿ＲＳ［ｄＢ］を送信電力パラメータとして所有している。   Next, the mobile station 3 determines the uplink TCCH transmission power to the base station 1 (step S310). FIG. 5 is a flowchart of determining the uplink TCCH transmission power at the time of terminal registration in the mobile station 3 under the different frequency non-reproducing repeater 10 according to the first embodiment of the present invention. The uplink TCCH transmission power in step S310 in FIG. 3 is determined by the processing in steps S501 to S504 in FIG. When the process of determining the uplink TCCH transmission power under the different frequency non-reproducing repeater 10 is started (step S501), TCCH_INI_BS [dBm], which is the uplink TCCH transmission power under the base station, in the same manner as in steps S402 and S403 in FIG. ] (First power) is calculated and determined (step S502). Then, the power obtained by adding Y_RS [dB] (second power control value) that is the transmission power control value via the different frequency non-regenerative repeater to the calculated uplink TCCH transmission power under the base station is determined as the uplink TCCH transmission power ( Step S503), and transmits to the base station 1 (step S504). Note that the mobile stations 2 and 3 have Y_RS [dB], which is a transmission power control value via a different frequency non-reproducing repeater, as a transmission power parameter.

次に、基地局１に送信した上りＴＣＣＨに対する応答（ＳＣＣＨ）を受信したか否かを判断する（ステップＳ３１２）。基地局１から応答を受信した（上りＴＣＣＨの送信が成功した）場合は、図２に示すシーケンスの通り、基地局１に個別制御チャネル（ＩＣＣＨ）を送信して無線リンク（無線回線）の設定要求を行う（ステップＳ３１６）。   Next, it is determined whether a response (SCCH) to the uplink TCCH transmitted to the base station 1 has been received (step S312). When a response is received from the base station 1 (successful transmission of uplink TCCH), the dedicated control channel (ICCH) is transmitted to the base station 1 as shown in the sequence of FIG. A request is made (step S316).

一方、基地局１からの応答を受信できなかった（上りＴＣＣＨ送信後、一定時間が経過しても、上りＴＣＣＨに対する応答を検出しない状況、すなわち、上りＴＣＣＨの送信が失敗した）場合は、ステップＳ３１０にて決定したＴＣＣＨ送信電力に、異周波非再生レピータ配下上りＴＣＣＨ再送用送信電力制御値であるＴＣＣＨ＿ＯＦＦＳＥＴ＿ＲＳ［ｄＢ］（第３の電力制御値）を加算した電力を上りＴＣＣＨ送信電力として決定して送信する（ステップＳ３１３）。すなわち、ステップＳ３１０にて決定したＴＣＣＨ送信電力に、異周波非再生レピータ配下上りＴＣＣＨ再送用送信電力制御値であるＴＣＣＨ＿ＯＦＦＳＥＴ＿ＲＳ［ｄＢ］を再送信するたびに加算する動作を所定回数繰り返す。なお、移動局２，３は、異周波非再生レピータ配下上りＴＣＣＨ再送用送信電力制御値であるＴＣＣＨ＿ＯＦＦＳＥＴ＿ＲＳ［ｄＢ］を送信電力パラメータとして所有している。   On the other hand, if the response from the base station 1 could not be received (a situation where a response to the uplink TCCH is not detected even after a certain time has elapsed after the uplink TCCH transmission, that is, the uplink TCCH transmission has failed), The power obtained by adding TCCH_OFFSET_RS [dB] (third power control value), which is the transmission power control value for uplink TCCH retransmission under the different frequency non-regenerative repeater, to the TCCH transmission power determined in S310 is determined as the uplink TCCH transmission power. (Step S313). That is, the operation of adding TCCH_OFFSET_RS [dB], which is a transmission power control value for uplink TCCH retransmission under the different frequency non-regenerative repeater, to the TCCH transmission power determined in step S310 is repeated a predetermined number of times. Note that the mobile stations 2 and 3 have TCCH_OFFSET_RS [dB], which is a transmission power control value for uplink TCCH retransmission under the different frequency non-reproducing repeater, as a transmission power parameter.

ステップＳ３１２、ステップＳ３１３の処理を行った後、なおも上りＴＣＣＨに対する基地局１からの応答を移動局２が受信できなかった場合は、リトライ回数カウント値を１ずつアップしながらステップＳ３１１〜ステップＳ３１４の処理を（設定リトライ回数−１）［回］（所定回数）繰り返す。そして、（設定リトライ回数−１）［回］を超過した場合は、移動局２の端末登録の失敗となる（ステップＳ３１５）。   If the mobile station 2 still fails to receive a response from the base station 1 to the uplink TCCH after performing the processing of Steps S312 and S313, Steps S311 to S314 are performed while increasing the retry count value by one. The above process is repeated (set retry count-1) [times] (predetermined number of times). If (setting retry count-1) [times] is exceeded, terminal registration of the mobile station 2 fails (step S315).

このように、移動局３の電力制御手段は、基地局１と移動局３とが異周波非再生レピータ１０を介して無線通信を行う経路（第２の経路）に対応した送信電力の制御を行う（第２の制御）。   As described above, the power control means of the mobile station 3 controls transmission power corresponding to the path (second path) in which the base station 1 and the mobile station 3 perform wireless communication via the different frequency non-reproducing repeater 10. Perform (second control).

以上のことから、移動局２，３において、受信ＣＣＨの周波数から基地局１と移動局２，３との通信経路を判断し、異周波非再生レピータ１０配下の移動局３は、基地局１配下の移動局２による上りＴＣＣＨ送信電力に異周波非再生レピータ経由用の電力制御値を加算して送信しており、基地局１配下の移動局２による上りＴＣＣＨ送信電力よりも大きい送信電力であるため上りＴＣＣＨの送信電力不足を解消することができる。   From the above, the mobile stations 2 and 3 determine the communication path between the base station 1 and the mobile stations 2 and 3 from the frequency of the received CCH, and the mobile station 3 under the different frequency non-reproducing repeater 10 A power control value for passing through a different frequency non-reproducing repeater is added to the uplink TCCH transmission power by the subordinate mobile station 2 and transmitted, and the transmission power is larger than the uplink TCCH transmission power by the mobile station 2 under the base station 1 Therefore, the shortage of uplink TCCH transmission power can be resolved.

また、基地局１配下の移動局２が上りＴＣＣＨを再送信する際において、ＣＣＨ受信電力から基地局１と移動局２との距離を推定し、基地局１の近傍に移動局２が存在しない場合は上りＴＣＣＨ送信電力を増加させて再送信し、基地局１の近傍に移動局２が存在する場合は上りＴＣＣＨ送信電力を増加させずに再送信する。当該再送信は、所定回数（例えば、移動局２の端末登録が完了するまで）繰り返し行われる。従って、移動局２の端末登録の成功率を上げるとともに、他の移動局の電力への影響を抑制することができる。   Further, when the mobile station 2 under the base station 1 retransmits the uplink TCCH, the distance between the base station 1 and the mobile station 2 is estimated from the CCH received power, and the mobile station 2 does not exist in the vicinity of the base station 1 If the mobile station 2 exists in the vicinity of the base station 1, the retransmission is performed without increasing the uplink TCCH transmission power. The retransmission is repeated a predetermined number of times (for example, until terminal registration of the mobile station 2 is completed). Therefore, the success rate of the terminal registration of the mobile station 2 can be increased and the influence on the power of other mobile stations can be suppressed.

また、異周波非再生レピータ１０配下の移動局３が上りＴＣＣＨを再送信する場合は、上りＴＣＣＨ送信電力を増加させて再送信する。当該再送信は、所定回数（例えば、移動局３の端末登録が完了するまで）繰り返し行われる。従って、移動局３の端末登録の成功率を上げることができる。   Further, when the mobile station 3 under the different frequency non-reproducing repeater 10 retransmits the uplink TCCH, the retransmission is performed by increasing the uplink TCCH transmission power. The retransmission is repeatedly performed a predetermined number of times (for example, until terminal registration of the mobile station 3 is completed). Therefore, the success rate of terminal registration of the mobile station 3 can be increased.

このように、移動局が自局の端末登録時において、自局が受信した下りＣＣＨの通信経路に関わらず、最適な上りＴＣＣＨ送信電力を制御することが可能となる。   In this way, when the mobile station registers its own terminal, it is possible to control the optimal uplink TCCH transmission power regardless of the downlink CCH communication path received by the mobile station.

〈実施形態２〉
図６は、本発明の実施形態２によるＸＧＰシステム（無線通信システム）の構成図である。本発明の実施形態２では、図６に示すように、不感地帯４に半径数十メートルの通信エリア（小セル）を対象とした基地局（以下、小セル用基地局）５（第２の基地局）を設置しており、移動局３は基地局１または小セル用基地局５のいずれかと無線通信を行うことを特徴としている。その他の構成および移動局２の動作は、実施形態１と同様であるためここでは説明を省略する。 <Embodiment 2>
FIG. 6 is a configuration diagram of an XGP system (wireless communication system) according to Embodiment 2 of the present invention. In Embodiment 2 of the present invention, as shown in FIG. 6, a base station (hereinafter referred to as a small cell base station) 5 (second cell base) for a communication area (small cell) having a radius of several tens of meters in the dead zone 4. Base station), and the mobile station 3 is characterized by performing wireless communication with either the base station 1 or the small cell base station 5. Since other configurations and the operation of the mobile station 2 are the same as those in the first embodiment, the description thereof is omitted here.

小セル用基地局５の開発によって、図６に示すように、異周波非再生レピータ１０（中継送受信装置）と小セル用基地局５とが共存するシステムが想定される。移動局３は、小セル用基地局５に直接的に端末登録する経路（第３の経路）と、異周波非再生レピータ１０を介して基地局１に端末登録する経路（第４の経路）とで、端末登録時に送信する上りＴＣＣＨ送信電力を変更する必要がある。また、ＴＣＣＨを再送信する際においても、通信経路に応じてＴＣＣＨ送信電力を変更する必要がある。しかし、移動局３では、小セル用基地局５から直接的に受信したＣＣＨの周波数はｆ２であり、異周波非再生レピータ１０を介して受信したＣＣＨの周波数もｆ２であるため、基地局１または小セル用基地局５のどちらから送信されてきたものなのか判別することができない（すなわち、通信経路の判別ができない）という問題がある。   With the development of the small cell base station 5, a system in which the different frequency non-reproducing repeater 10 (relay transmission / reception device) and the small cell base station 5 coexist is assumed as shown in FIG. The mobile station 3 directly registers a terminal with the small cell base station 5 (third path) and a path to register with the base station 1 via the different frequency non-reproducing repeater 10 (fourth path). Therefore, it is necessary to change the uplink TCCH transmission power transmitted at the time of terminal registration. Moreover, also when retransmitting TCCH, it is necessary to change TCCH transmission power according to a communication path. However, in the mobile station 3, the frequency of the CCH received directly from the small cell base station 5 is f2, and the frequency of the CCH received via the different frequency non-reproducing repeater 10 is also f2. Alternatively, there is a problem that it is impossible to determine which of the small cell base stations 5 is transmitted (that is, the communication path cannot be determined).

基地局１および小セル用基地局５は、それぞれ報知用チャネル（ＢＣＣＨ）を移動局に報知送信している。前述の通り、ＢＣＣＨはＣＣＨに含まれている。ＢＣＣＨには、基地局情報やシステム情報が含まれており、基地局情報には当該基地局が送受信する周波数帯域情報が含まれている。例えば、図６に示すＸＧＰシステムにおいて、基地局１が送信するＢＣＣＨに含まれている周波数帯域情報はｆ１となり、小セル用基地局５が送信するＢＣＣＣＨに含まれている周波数帯域情報はｆ２となる。   Each of the base station 1 and the small cell base station 5 broadcasts a broadcast channel (BCCH) to the mobile station. As described above, BCCH is included in CCH. The BCCH includes base station information and system information, and the base station information includes frequency band information transmitted and received by the base station. For example, in the XGP system shown in FIG. 6, the frequency band information included in the BCCH transmitted from the base station 1 is f1, and the frequency band information included in the BCCCH transmitted from the small cell base station 5 is f2. Become.

移動局３は、受信したＣＣＨの周波数と、ＢＣＣＨに含まれている周波数帯域情報とから、小セル用基地局５から直接的に送信されてきた通信経路なのか、または、異周波非再生レピータ１０を介して基地局１から送信されてきた通信経路なのかを判定する（経路判定手段）。   The mobile station 3 determines whether it is a communication path directly transmitted from the small cell base station 5 based on the received CCH frequency and frequency band information included in the BCCH, or a different frequency non-reproducing repeater. 10 determines whether the communication path is transmitted from the base station 1 via 10 (path determination means).

図７は、本発明の実施形態２による移動局３における受信信号経路判定のフローチャートである。図７に示すように、受信信号経路判別が開始されると（ステップＳ７０１）、受信したＣＣＨの周波数を認識する（ステップＳ７０２）。   FIG. 7 is a flowchart of received signal path determination in the mobile station 3 according to the second embodiment of the present invention. As shown in FIG. 7, when reception signal path determination is started (step S701), the frequency of the received CCH is recognized (step S702).

次に、ＢＣＣＨに含まれている周波数帯域情報を取得し（ステップＳ７０３）、ステップＳ７０２にて認識したＣＣＨの周波数と、ステップＳ７０３にて取得した周波数帯域情報とが一致しているか否かを判断する（ステップＳ７０４）。   Next, frequency band information included in BCCH is acquired (step S703), and it is determined whether the frequency of CCH recognized in step S702 matches the frequency band information acquired in step S703. (Step S704).

ステップＳ７０４での判断の結果、ＣＣＨの周波数と周波数帯域情報とが一致している場合は、受信したＣＣＨが小セル用基地局５から直接的に送信されてきたものであると認識され（ステップＳ７０５）、受信信号経路判別は完了する（ステップＳ７０６）。例えば、図６に示すＸＧＰシステムにおいて、ステップＳ７０２にて認識した周波数がｆ２であり、かつ、ステップＳ７０３にて取得した周波数帯域情報がｆ２の場合が相当する。   As a result of the determination in step S704, if the CCH frequency matches the frequency band information, it is recognized that the received CCH is directly transmitted from the small cell base station 5 (step S704). S705), the reception signal path discrimination is completed (step S706). For example, in the XGP system shown in FIG. 6, the frequency recognized in step S702 is f2, and the frequency band information acquired in step S703 is f2.

一方、ステップＳ７０４での判定の結果、ＣＣＨの周波数と周波数帯域情報とが異なる場合は、受信したＣＣＨが異周波非再生レピータ１０を介して基地局１から送信されてきたものであると認識され（ステップＳ７０７）、受信信号経路判別は完了する（ステップＳ７０６）。例えば、図６に示すＸＧＰシステムにおいて、ステップＳ７０２にて認識した周波数がｆ２であり、かつ、ステップＳ７０３にて取得した周波数帯域情報がｆ１の場合が相当する。   On the other hand, if the result of determination in step S704 is that the CCH frequency and the frequency band information are different, it is recognized that the received CCH is transmitted from the base station 1 via the different frequency non-reproducing repeater 10. (Step S707), the reception signal path discrimination is completed (step S706). For example, in the XGP system shown in FIG. 6, the frequency recognized in step S702 is f2, and the frequency band information acquired in step S703 is f1.

このように、移動局３では、異周波非再生レピータ１０が、異周波非再生レピータ１０と基地局１との間における通信周波数をｆ１とし、異周波非再生レピータ１０と移動局３との間における通信周波数をｆ２とするように周波数変換を行っていることを利用して、通信経路の判定を行うことができる。   Thus, in the mobile station 3, the different frequency non-reproducing repeater 10 sets the communication frequency between the different frequency non-reproducing repeater 10 and the base station 1 to f 1, and between the different frequency non-reproducing repeater 10 and the mobile station 3. The communication path can be determined using the fact that the frequency conversion is performed so that the communication frequency at f2 is f2.

移動局３は、判定された通信経路に応じて、上りＴＣＣＨ送信電力の制御を行う。   The mobile station 3 controls the uplink TCCH transmission power according to the determined communication path.

移動局３において、受信したＣＣＨが異周波非再生レピータ１０を介して基地局１から送信されてきたものであると判定されると、図３のステップＳ３１０〜ステップＳ３１６、および図５のステップＳ５０１〜ステップＳ５０４と同様の処理を行って、上りＴＣＣＨ送信電力を決定して基地局１に送信する。   If the mobile station 3 determines that the received CCH is transmitted from the base station 1 via the different frequency non-reproducing repeater 10, the steps S310 to S316 in FIG. 3 and the step S501 in FIG. 5 are performed. The same processing as in Step S504 is performed, and the uplink TCCH transmission power is determined and transmitted to the base station 1.

このように、移動局３の電力制御手段は、基地局１と移動局３とが異周波非再生レピータ１０を介して無線通信を行う経路（第４の経路）に対応した送信電力の制御を行う（第４の制御）。すなわち、基地局１と移動局３（自局）との間における伝播損失を算出し、無線通信に必要なＴａｒｇｅｔ＿ＴＣＣＨ（ターゲット電力）に伝播損失分の電力を加算したＴＣＣＨ＿ＩＮＩ＿ＢＳ（第３の送信電力）にさらにＹ＿ＲＳ（第５の電力制御値）を加算したＴＣＣＨ＿ＩＮＩ＿ＲＳ（第４の送信電力）を上りＴＣＣＨ初期送信電力として決定した後に基地局１に送信し、当該送信が失敗した際において、ＴＣＣＨ＿ＩＮＩ＿ＲＳにＴＣＣＨ＿ＯＦＦＳＥＴ＿ＲＳ（第６の電力制御値）を再送信するたびに加算する動作を所定回数繰り返す。   As described above, the power control unit of the mobile station 3 controls transmission power corresponding to the path (fourth path) in which the base station 1 and the mobile station 3 perform wireless communication via the different frequency non-reproducing repeater 10. Perform (fourth control). That is, a propagation loss between the base station 1 and the mobile station 3 (own station) is calculated, and TCCH_INI_BS (third transmission power) obtained by adding the power for the propagation loss to Target_TCCH (target power) necessary for wireless communication TCCH_INI_RS (fourth transmission power) obtained by further adding Y_RS (fifth power control value) to TCCH_INI_RS after TCCH_INI_RS (fourth transmission power) is determined as uplink TCCH initial transmission power and the transmission fails. The operation of adding each time (sixth power control value) is retransmitted is repeated a predetermined number of times.

一方、受信したＣＣＨが小セル用基地局５から直接的に送信されてきたものであると判定されると、小セル用基地局５のＣＣＨ送信出力値とＣＣＨ受信電力とから小セル用基地局５と移動局３との間における伝播損失を算出する。そして、移動局３は、小セル用基地局５との無線通信に必要な上りＴＣＣＨターゲット電力に伝播損失分の電力を加算したＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］（第３の送信電力）を上りＴＣＣＨ初期送信電力として決定して小セル用基地局５に送信する。なお、移動局２，３は、小セル用基地局５のＣＣＨ送信出力値と上りＴＣＣＨターゲット電力とを送信電力パラメータとして所有している。   On the other hand, if it is determined that the received CCH is directly transmitted from the small cell base station 5, the small cell base is determined from the CCH transmission output value of the small cell base station 5 and the CCH received power. The propagation loss between the station 5 and the mobile station 3 is calculated. Then, the mobile station 3 uses the TCCH_INI_BS [dBm] (third transmission power) obtained by adding the power for the propagation loss to the uplink TCCH target power necessary for the radio communication with the small cell base station 5, and the uplink TCCH initial transmission power. And transmitted to the small cell base station 5. Note that the mobile stations 2 and 3 own the CCH transmission output value of the small cell base station 5 and the uplink TCCH target power as transmission power parameters.

移動局３が小セル用基地局５からの応答を受信した場合は、図２に示すシーケンスの通り、小セル用基地局５に個別制御チャネル（ＩＣＣＨ）を送信して無線リンク（無線回線）の設定要求を行う。   When the mobile station 3 receives a response from the small cell base station 5, the dedicated link (ICCH) is transmitted to the small cell base station 5 as shown in the sequence of FIG. Make a setting request.

一方、移動局３が小セル用基地局５からの応答を受信しなかった場合は、図３のステップＳ３０４〜ステップＳ３０８と同様の処理を行う。すなわち、小セル用基地局５の近傍に移動局３が存在しない場合は、ＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］にＴＣＣＨ＿ＯＦＦＳＥＴ＿ＢＳ［ｄＢ］（第４の電力制御値）を再送信するたびに加算する動作を所定回数繰り返し、小セル用基地局５の近傍に移動局３が存在する場合は、ＴＣＣＨ＿ＩＮＩ＿ＢＳ［ｄＢｍ］で再送信する動作を所定回数繰り返す。   On the other hand, when the mobile station 3 does not receive a response from the small cell base station 5, processing similar to that in steps S304 to S308 in FIG. 3 is performed. That is, when the mobile station 3 does not exist in the vicinity of the small cell base station 5, the operation of adding TCCH_OFFSET_BS [dB] (fourth power control value) to TCCH_INI_BS [dBm] is repeated a predetermined number of times. When the mobile station 3 is present in the vicinity of the small cell base station 5, the operation of retransmitting with TCCH_INI_BS [dBm] is repeated a predetermined number of times.

このように、移動局３の電力制御手段は、小セル用基地局５と移動局３とが直接的に無線通信を行う経路（第３の経路）に対応した送信電力の制御を行う（第３の制御）。   Thus, the power control means of the mobile station 3 controls transmission power corresponding to the path (third path) in which the small cell base station 5 and the mobile station 3 directly perform wireless communication (the third path). 3 control).

以上のことから、移動局２，３は、受信したＣＣＨの周波数とＢＣＣＨに含まれている周波数帯域情報とからＣＣＨの送信経路を判断することができ、移動局２，３が自局の端末登録時において、移動局２，３が受信した下りＣＣＨの通信経路に関わらず、最適な上りＴＣＣＨ送信電力を制御することが可能となる。   From the above, the mobile stations 2 and 3 can determine the CCH transmission path from the received CCH frequency and the frequency band information included in the BCCH. At the time of registration, the optimum uplink TCCH transmission power can be controlled regardless of the downlink CCH communication path received by the mobile stations 2 and 3.

また、移動局３が異周波非再生レピータ１０配下である場合は、移動局３が小セル用基地局５配下である場合における上りＴＣＣＨ送信電力に、異周波非再生レピータ経由用の電力制御値を加算して送信しており、移動局３が小セル用基地局５配下である場合における上りＴＣＣＨ送信電力よりも大きい送信電力であるため上りＴＣＣＨの送信電力不足を解消することができる。   When the mobile station 3 is under the different frequency non-reproducing repeater 10, the power control value for passing through the different frequency non-reproducing repeater is used as the uplink TCCH transmission power when the mobile station 3 is under the small cell base station 5. Since the transmission power is higher than the uplink TCCH transmission power when the mobile station 3 is under the control of the small cell base station 5, the lack of uplink TCCH transmission power can be resolved.

この発明の活用例として、基地局と移動局との間に非再生中継送受信装置を導入した移動体通信システムに利用できる。   As an application example of the present invention, the present invention can be used in a mobile communication system in which a non-regenerative repeater transmission / reception apparatus is introduced between a base station and a mobile station.

１ 基地局、２，３，３ａ，３ｂ 移動局、４ 不感地帯、５ 小セル用基地局、１０ 異周波非再生レピータ、１１ 基地局側アンテナ、１２ 端末側アンテナ。   1 base station, 2, 3, 3a, 3b mobile station, 4 dead zone, 5 small cell base station, 10 different frequency non-reproducing repeater, 11 base station side antenna, 12 terminal side antenna.

Claims (9)

基地局と、
前記基地局と無線通信を行う移動局と、
前記基地局と前記移動局との間の無線通信を補助するために配置され、前記基地局との間における前記無線通信の周波数と、前記移動局との間における前記無線通信の周波数とが異なるように、前記無線通信を中継する中継送受信装置と、
を備える無線通信システムであって、
前記移動局は、
前記無線通信システムへの自局の端末登録時において、受信周波数に基づいて、前記基地局と前記自局との間で直接的に前記無線通信を行う第１の経路か、または、前記中継送受信装置を介して前記基地局と前記自局との間で前記無線通信を行う第２の経路かの経路判定を行う経路判定手段と、
前記第１の経路の場合は当該第１の経路に対応した送信電力の制御である第１の制御を行い、前記第２の経路の場合は当該第２の経路に対応した前記送信電力の制御である第２の制御を行う電力制御手段と、
を備えることを特徴とする、無線通信システム。 A base station,
A mobile station that performs wireless communication with the base station;
Arranged to assist wireless communication between the base station and the mobile station, the frequency of the wireless communication with the base station is different from the frequency of the wireless communication with the mobile station A relay transmission / reception device that relays the wireless communication;
A wireless communication system comprising:
The mobile station
At the time of terminal registration of the own station in the wireless communication system, based on the reception frequency, the first route for performing the wireless communication directly between the base station and the own station, or the relay transmission / reception Route determination means for determining a route of a second route for performing the wireless communication between the base station and the own station via a device;
In the case of the first route, the first control that is control of the transmission power corresponding to the first route is performed, and in the case of the second route, the control of the transmission power corresponding to the second route is performed. Power control means for performing the second control,
A wireless communication system comprising: 前記電力制御手段における前記第１の制御は、前記基地局と前記自局との間における伝播損失を算出し、前記無線通信に必要なターゲット電力に前記伝播損失分の電力を加算した第１の送信電力を前記送信電力として決定した後に前記基地局に送信し、当該送信が失敗した際において、前記自局が前記基地局の近傍に存在するか否かを判定し、前記近傍に存在しない場合は前記第１の送信電力に第１の電力制御値を再送信するたびに加算する動作を所定回数繰り返し、前記近傍に存在する場合は前記第１の送信電力で再送信する動作を所定回数繰り返すことを特徴とする、請求項１に記載の無線通信システム。   The first control in the power control means calculates a propagation loss between the base station and the own station, and adds a power corresponding to the propagation loss to a target power necessary for the wireless communication. When the transmission power is determined as the transmission power and then transmitted to the base station, and when the transmission fails, it is determined whether or not the own station exists in the vicinity of the base station, and the transmission power does not exist in the vicinity Repeats the operation of adding the first power control value to the first transmission power every time it is retransmitted a predetermined number of times, and repeats the operation of retransmitting at the first transmission power a predetermined number of times if it exists in the vicinity The wireless communication system according to claim 1, wherein: 前記電力制御手段における前記第２の制御は、前記基地局と前記自局との間における伝播損失を算出し、前記無線通信に必要なターゲット電力に前記伝播損失分の電力を加算した第１の送信電力にさらに第２の電力制御値を加算した第２の送信電力を前記送信電力として決定した後に前記基地局に送信し、当該送信が失敗した際において、前記第２の送信電力に第３の電力制御値を再送信するたびに加算する動作を所定回数繰り返すことを特徴とする、請求項１または２に記載の無線通信システム。   The second control in the power control means is a first control that calculates a propagation loss between the base station and the own station, and adds a power for the propagation loss to a target power necessary for the wireless communication. A second transmission power obtained by adding a second power control value to the transmission power is determined as the transmission power, and then transmitted to the base station. When the transmission fails, the second transmission power is set to the third transmission power. The wireless communication system according to claim 1, wherein an operation of adding the power control value every time is retransmitted a predetermined number of times. 請求項１ないし３のいずれかに記載の無線通信システムに用いられる移動局。   The mobile station used for the radio | wireless communications system in any one of Claim 1 thru | or 3. 第１の基地局および小セル用の第２の基地局と、
前記第１の基地局または前記第２の基地局のいずれかと無線通信を行う移動局と、
前記第１の基地局と前記移動局との間の無線通信を補助するために配置され、前記第１の基地局との間における前記無線通信の周波数と、前記移動局との間における前記無線通信の周波数とが異なるように前記無線通信を中継する中継送受信装置と、
を備える無線通信システムであって、
前記移動局は、
前記無線通信システムへの自局の端末登録時において、所定の判定基準に基づいて、前記第２の基地局と前記自局との間で直接的に前記無線通信を行う第３の経路か、または、前記中継送受信装置を介して前記第１の基地局と前記自局との間で前記無線通信を行う第４の経路かの経路判定を行う経路判定手段と、
前記第３の経路の場合は当該第３の経路に対応した送信電力の制御である第３の制御を行い、前記第４の経路の場合は当該第４の経路に対応した前記送信電力の制御である第４の制御を行う電力制御手段と、
を備えることを特徴とする、無線通信システム。 A first base station and a second base station for a small cell;
A mobile station in wireless communication with either the first base station or the second base station;
It is arranged to assist radio communication between the first base station and the mobile station, and the radio communication frequency between the first base station and the radio between the first base station and the mobile station A relay transmission / reception device that relays the wireless communication so that the frequency of communication is different;
A wireless communication system comprising:
The mobile station
At the time of terminal registration of the own station to the wireless communication system, based on a predetermined determination criterion, a third path for performing the wireless communication directly between the second base station and the own station, Or route determination means for determining a route of the fourth route for performing the wireless communication between the first base station and the own station via the relay transmission / reception device;
In the case of the third route, the third control, which is the control of the transmission power corresponding to the third route, is performed, and in the case of the fourth route, the control of the transmission power corresponding to the fourth route. Power control means for performing the fourth control,
A wireless communication system comprising: 前記経路判定手段は、前記移動局が受信した制御チャネルの周波数と、当該制御チャネルに含まれる前記第１または第２の基地局のいずれかの送信時の周波数情報とに基づいて、前記第１の経路か前記第２の経路かの判定を行うことを特徴とする、請求項５に記載の無線通信システム。   The route determination means is configured to determine the first channel based on the frequency of the control channel received by the mobile station and the frequency information at the time of transmission of either the first or second base station included in the control channel. 6. The wireless communication system according to claim 5, wherein it is determined whether the route is the second route or the second route. 前記電力制御手段における前記第３の制御は、前記第２の基地局と前記自局との間における伝播損失を算出し、前記無線通信に必要なターゲット電力に前記伝播損失分の電力を加算した第３の送信電力を前記送信電力として決定した後に前記第２の基地局に送信し、当該送信が失敗した際において、前記自局が前記第２の基地局の近傍に存在するか否かを判定し、前記近傍に存在しない場合は前記第３の送信電力に第４の電力制御値を再送信するたびに加算する動作を所定回数繰り返し、前記近傍に存在する場合は前記第３の送信電力で再送信する動作を所定回数繰り返すことを特徴とする、請求項５または６に記載の無線通信システム。   The third control in the power control means calculates a propagation loss between the second base station and the own station, and adds the power for the propagation loss to the target power required for the wireless communication. After determining the third transmission power as the transmission power and transmitting to the second base station, when the transmission fails, whether or not the own station exists in the vicinity of the second base station If it does not exist in the vicinity, the operation of adding the fourth power control value to the third transmission power every time it is retransmitted is repeated a predetermined number of times, and if it exists in the vicinity, the third transmission power The wireless communication system according to claim 5, wherein the operation of re-transmission is repeated a predetermined number of times. 前記電力制御手段における前記第４の制御は、前記第１の基地局と前記自局との間における伝播損失を算出し、前記無線通信に必要なターゲット電力に前記伝播損失分の電力を加算した第３の送信電力にさらに第５の電力制御値を加算した第４の送信電力を前記送信電力として決定した後に前記第１の基地局に送信し、当該送信が失敗した際において、前記第４の送信電力に第６の電力制御値を再送信するたびに加算する動作を所定回数繰り返すことを特徴とする、請求項５ないし７のいずれかに記載の無線通信システム。   The fourth control in the power control means calculates a propagation loss between the first base station and the own station, and adds the power for the propagation loss to the target power necessary for the wireless communication. A fourth transmission power obtained by adding a fifth power control value to the third transmission power is determined as the transmission power, and then transmitted to the first base station. When the transmission fails, the fourth transmission power The wireless communication system according to claim 5, wherein an operation of adding the sixth power control value to the transmission power of each time is repeated a predetermined number of times. 請求項５ないし８のいずれかに記載の無線通信システムに用いられる移動局。   A mobile station used in the radio communication system according to claim 5.
JP2010041421A 2010-02-26 2010-02-26 Radio communication system and mobile station Pending JP2011182002A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011229089A (en) * 2010-04-22 2011-11-10 Kyocera Corp Terminal device, base station and wireless communication system
WO2013084338A1 (en) * 2011-12-08 2013-06-13 富士通株式会社 Wireless base station, wireless communication system, transmitting power control method, and wireless terminal
WO2023221807A1 (en) * 2022-05-16 2023-11-23 Mediatek Inc. Power control for repeaters and multi-path communication

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011229089A (en) * 2010-04-22 2011-11-10 Kyocera Corp Terminal device, base station and wireless communication system
WO2013084338A1 (en) * 2011-12-08 2013-06-13 富士通株式会社 Wireless base station, wireless communication system, transmitting power control method, and wireless terminal
EP2790445A4 (en) * 2011-12-08 2015-05-06 Fujitsu Ltd Wireless base station, wireless communication system, transmitting power control method, and wireless terminal
US9642102B2 (en) 2011-12-08 2017-05-02 Fujitsu Limited Wireless base station, wireless communication system, and transmission power control method
WO2023221807A1 (en) * 2022-05-16 2023-11-23 Mediatek Inc. Power control for repeaters and multi-path communication

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