JP2007189373A - Communication power control method, mobile station, and base station - Google Patents

Communication power control method, mobile station, and base station Download PDF

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JP2007189373A
JP2007189373A JP2006004418A JP2006004418A JP2007189373A JP 2007189373 A JP2007189373 A JP 2007189373A JP 2006004418 A JP2006004418 A JP 2006004418A JP 2006004418 A JP2006004418 A JP 2006004418A JP 2007189373 A JP2007189373 A JP 2007189373A
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transmission power
base station
response signal
mobile station
frame
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JP4633633B2 (en
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Shinji Imada
今田晋司
Takashi Kamata
鎌田隆志
Mitsuo Honda
本多光男
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Fujitsu Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To shorten a time required for determining transmission power in a communication system, by which packet data are exchanged between a base station and a mobile station, i.e., packet communication by a CDMA system, etc., concerning a communication power control method, the mobile station, and the base station. <P>SOLUTION: When the packet data are exchanged between the mobile station 1 and the base station 2; the mobile station 1 divides a packet for determining the transmission power to be transmitted to the base station 2 into a plurality of radio frames by time-division with the use of a frame dividing part 5, successively increases the transmission power by each frame in a transmission power control part 7, and transmits it. The base station 2 performs the detection processing of the packet for determining the transmission power by each divided frame with the use of a detector 14. A transmission data control unit 15 adds identification information of the division frame, with which the packet for determining the transmission power is detected for the first time to a response signal, and transmits it to the mobile station 1. The mobile station 1 receives the response signal, determines the transmission power, based on the identification information of the division frame added to the response signal, and transmits a message part with the transmission power. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、通信電力制御方法、移動局及び基地局に関し、特に、ＣＤＭＡ（Code Division Multiple Access）方式によるパケット通信等、基地局と移動局との間でパケットデータの送受信を行う通信システムにおける通信電力の制御に係るものである。   The present invention relates to a communication power control method, a mobile station, and a base station, and in particular, communication in a communication system that transmits and receives packet data between a base station and a mobile station, such as packet communication using a CDMA (Code Division Multiple Access) method. This is related to power control.

第３世代移動通信システムであるＷ−ＣＤＭＡ方式のランダムアクセスチャネル（ＲＡＣＨ）では、移動局はプリアンブル信号を送信し、基地局から該プリアンブル信号を検出したことを示す応答信号（ＡＩ：Acquisition Indicator）を受信するまで、徐々に送信電力を上げながら、複数回プリアンブル信号を繰り返し送信する。   In a W-CDMA random access channel (RACH), which is a third generation mobile communication system, a mobile station transmits a preamble signal and a response signal (AI: Acquisition Indicator) indicating that the preamble signal has been detected from a base station. Until the transmission power is gradually increased, the preamble signal is repeatedly transmitted a plurality of times.

基地局では移動局から送信されたプリアンブル信号を検出することができたとき、移動局に対して応答信号（ＡＩ）を送信する。移動局は該応答信号（ＡＩ）を受信した時点でプリアンブル信号の送信を止め、その直前に送信したプリアンブル信号の送信電力に対応した電力でメッセージ部の信号を送信する。   When the base station can detect the preamble signal transmitted from the mobile station, the base station transmits a response signal (AI) to the mobile station. When the mobile station receives the response signal (AI), the mobile station stops transmitting the preamble signal, and transmits the signal of the message part with power corresponding to the transmission power of the preamble signal transmitted immediately before.

上述のように、小さな初期値から所定のステップ幅で次第に送信電力を増大させる所謂パワーランピングによる従来の送信電力決定のタイムチャートを図５に示す。同図の（ａ）は基地局から移動局へ送信される下りリンクの信号を示し、同図の（ｂ）は移動局から基地局へ送信される上りリンクの信号を示している。   As described above, FIG. 5 shows a time chart of conventional transmission power determination by so-called power ramping in which transmission power is gradually increased with a predetermined step width from a small initial value. (A) of the figure shows a downlink signal transmitted from the base station to the mobile station, and (b) of the figure shows an uplink signal transmitted from the mobile station to the base station.

同図に示す例では、移動局から上りリンクによる１回目のプリアンブル信号の送信（５−１）に対して、基地局からの下りリンクで応答信号（５−２）が移動局で受信されず、そのため、移動局では送信電力を所定のステップ幅だけ増大させて２回目のプリアンブル信号（５−３）を送信する。   In the example shown in the figure, the mobile station does not receive the response signal (5-2) in the downlink from the base station in response to the first transmission of the preamble signal (5-1) in the uplink from the mobile station. Therefore, the mobile station increases the transmission power by a predetermined step width and transmits the second preamble signal (5-3).

該プリアンブル信号（５−３）の送信に対して、下りリンクで基地局からの応答信号（５−４）が移動局で受信されず、そのため、移動局では更に送信電力を所定のステップ幅だけ増大させて３回目のプリアンブル信号（５−５）を送信する。該３回目のプリアンブル信号（５−５）の送信に対して、下りリンクで基地局からの応答信号（５−６）が移動局で受信されると、移動局は、３回目のプリアンブル信号（５−５）を送信した電力で、メッセージ部（５−７）を送信する。   In response to the transmission of the preamble signal (5-3), the response signal (5-4) from the base station is not received by the mobile station in the downlink, so that the mobile station further reduces the transmission power by a predetermined step width. Increase the third preamble signal (5-5). In response to the transmission of the third preamble signal (5-5), when the mobile station receives a response signal (5-6) from the base station in the downlink, the mobile station transmits the third preamble signal ( The message part (5-7) is transmitted with the power transmitted in step 5-5).

本発明に関連する先行技術文献として、下記の特許文献１には、オープンループパワーコントロールにより送信電力を制御する場合、伝播プロファイルで示されるパス特性から導出される初期送信電力補正値及び、送信電力増幅ステップ幅を格納した最適制御値格納部から初期送信電力補正値及び、送信電力増幅ステップ幅を選択して、選択された初期送信電力補正値及び、送信電力増幅ステップ幅と、平均伝播損失と、予め定められた、又は、基地局からの報知信号で報知された基地局受信閾値とから送信電力制御値を決定してオープンループパワーコントロールにより送信電力を適応制御することにより、パス特性毎送信電力を必要最小限にし得るランダムアクセス手段を有する移動通信装置について記載されている。   As a prior art document related to the present invention, the following Patent Document 1 describes an initial transmission power correction value derived from a path characteristic indicated by a propagation profile and a transmission power when transmitting power is controlled by open loop power control. The initial transmission power correction value and the transmission power amplification step width are selected from the optimum control value storage unit storing the amplification step width, the selected initial transmission power correction value, the transmission power amplification step width, and the average propagation loss. The transmission power control value is determined from the base station reception threshold value determined in advance or broadcasted by the broadcast signal from the base station, and transmission power is adaptively controlled by open loop power control, thereby transmitting each path characteristic. A mobile communication device having random access means that can minimize power is described.

また、下記の特許文献２には、基地局と移動局との間でパケットデータの送受信を行う際に、パケットデータの送信に先立って送信されたプリアンブル信号の受信強度に基づいてパケットデータの送信電力を決定し、決定された送信電力に関する情報を移動局において取得し、取得した情報に基づいてパケットデータの送信を行うとともに、パケットデータの送信処理と並行して、後続するパケットデータの量及び種別に関する情報を予約信号として基地局に送信することにより、オーバーヘッドや制御処理遅延を増大させることなく、パケット毎の電力制御を可能とし、通信品質の向上を図った通信制御システムについて記載されている。
特開２００２−２６１６８９公報 特開２００３−１６３９６２公報 Further, in Patent Document 2 below, when packet data is transmitted / received between a base station and a mobile station, transmission of packet data is performed based on the reception strength of a preamble signal transmitted prior to transmission of packet data. The power is determined, information regarding the determined transmission power is acquired in the mobile station, packet data is transmitted based on the acquired information, and in parallel with the packet data transmission process, the amount of subsequent packet data and A communication control system is described in which power control for each packet is possible without increasing overhead or control processing delay by transmitting information on the type as a reservation signal to the base station, thereby improving communication quality. .
Japanese Patent Laid-Open No. 2002-261689 JP 2003-163962 A

前述のようなパワーランピングにより送信電力を決定する場合、プリアンブル信号の送信から該プリアンブル信号の検出結果の受信までを１回の試行時間としたとき、プリアンブル信号の送信毎に送信電力を増加させ、基地局でプリアンブル信号が検出されるまで、プリアンブル信号の送信をｎ回試行する従来の手法では、メッセージ部の信号の送信電力が決定されるまでに、ｎ試行時間を要することになる。本発明はこの送信電力を決定するまでに要する時間を短縮することを目的とする。   When transmitting power is determined by power ramping as described above, when transmission time from the transmission of the preamble signal to reception of the detection result of the preamble signal is one trial time, the transmission power is increased for each transmission of the preamble signal, In the conventional method in which transmission of the preamble signal is attempted n times until the preamble signal is detected at the base station, n trial times are required until the transmission power of the message part signal is determined. An object of the present invention is to shorten the time required to determine the transmission power.

本発明の通信電力制御方法は、基地局と移動局との間でパケットデータの送受信を行う際に、移動局は、基地局へ送信する送信電力決定用パケットを複数の無線フレームに時分割的に分割し、かつ、分割したフレーム毎に送信電力を順次増加させて送信し、基地局は、前記分割されたフレーム毎に送信電力決定用パケットの検出処理を行い、該送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を移動局に送信し、前記移動局は、前記基地局からの応答信号に含まれる分割フレームの識別情報を基に送信電力を決定し、メッセージ部を該送信電力で送信することを特徴とする。   In the communication power control method of the present invention, when packet data is transmitted and received between a base station and a mobile station, the mobile station time-divides transmission power determination packets to be transmitted to the base station into a plurality of radio frames. The base station performs transmission power determination packet detection processing for each of the divided frames, and transmits the transmission power determination packet to each of the divided frames. A response signal having identification information of the first detected divided frame is transmitted to the mobile station, and the mobile station determines transmission power based on the identification information of the divided frame included in the response signal from the base station. The message portion is transmitted with the transmission power.

また、（２）前記基地局は、送信電力決定用パケットが最初に検出された分割フレームの識別情報として、時分割的に分割された無線フレームのスロット番号を前記応答信号に付加し、前記移動局は、基地局からの応答信号に含まれる前記スロット番号を基に送信電力を決定することを特徴とする。   (2) The base station adds a slot number of a radio frame divided in a time division manner to the response signal as identification information of a divided frame in which a transmission power determination packet is first detected, and The station determines transmission power based on the slot number included in the response signal from the base station.

また、（３）前記基地局は、送信電力決定用パケットが最初に検出された分割フレームの識別情報として、時分割的に分割された無線フレームの送信電力決定用パケットの検出タイミングに対応したタイミングで前記応答信号を送信し、前記移動局は、前記応答信号の受信タイミングを基に送信電力を決定することを特徴とする。   (3) The base station uses the timing corresponding to the detection timing of the transmission power determination packet of the radio frame divided in a time division manner as identification information of the divided frame in which the transmission power determination packet is first detected. And transmitting the response signal, and the mobile station determines transmission power based on the reception timing of the response signal.

また、本発明の移動局は、（４）基地局へ送信する送信電力決定用パケットを複数の無線フレームに分割し、かつ、分割したフレーム毎に送信電力を増加させて送信する送信電力制御手段と、基地局から送信され、前記送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を受信する応答信号検出手段と、前記応答信号検出手段で検出された応答信号に含まれる分割フレームの識別情報を基に送信電力を決定し、メッセージ部を該送信電力で送信するよう送信電力を制御する前記送信電力制御手段と、を備えたことを特徴とする。   Further, the mobile station of the present invention is (4) a transmission power control means for dividing a transmission power determination packet to be transmitted to a base station into a plurality of radio frames and increasing the transmission power for each divided frame and transmitting the divided frames. Response signal detection means for receiving a response signal transmitted from the base station and having identification information of a divided frame in which the transmission power determination packet is first detected; and a response signal detected by the response signal detection means And transmission power control means for determining transmission power based on identification information of the divided frames included in the frame and controlling the transmission power so that the message part is transmitted with the transmission power.

また、本発明の基地局は（５）複数の無線フレームに分割され、かつ該無線フレーム毎に送信電力を増加させて移動局から送信された送信電力決定用パケットをフレーム毎に検出する送信電力決定用パケット検出手段と、前記送信電力決定用パケット検出手段で最初に検出された送信電力決定用パケットの分割フレームの識別情報を応答信号に保有させる送信データ制御手段と、前記を移動局に送信する手段と、前記送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を送信する送信手段と、を備えたことを特徴とする。   Also, the base station of the present invention is (5) a transmission power that is divided into a plurality of radio frames and that detects transmission power determination packets transmitted from mobile stations by increasing the transmission power for each radio frame for each frame. A decision packet detection means, a transmission data control means for holding the identification information of the divided frame of the transmission power decision packet first detected by the transmission power decision packet detection means in a response signal, and the transmission to the mobile station And transmitting means for transmitting a response signal holding identification information of the divided frame in which the transmission power determination packet is first detected.

本発明によれば、送信電力決定用パケットを複数の無線フレームに時分割的に分割し、分割したフレーム毎に送信電力を順次増加させて送信することにより、従来の手法では１回の試行で送信する送信電力決定用パケットは１個であったのに対し、本発明による手法では、１回の試行で複数個の送信電力決定用パケットを送信することができるので、送信電力決定までの時間を短縮することができる。   According to the present invention, a transmission power determination packet is divided into a plurality of radio frames in a time division manner, and transmission power is sequentially increased for each of the divided frames. The number of transmission power determination packets to be transmitted is one, whereas in the method according to the present invention, a plurality of transmission power determination packets can be transmitted in one trial. Can be shortened.

図１は本発明の第１の実施形態の機能ブロック図である。本発明の第１の実施形態では、移動局１が基地局２に対して上りのパケットデータ（移動局１から基地局２へのパケットデータ）の送信を要求する場合、送信データ制御部３で該送信要求を受け、連続送信するフレーム数、ステップサイズ（送信電力増幅幅）を送信電力制御部７に指定する。   FIG. 1 is a functional block diagram of the first embodiment of the present invention. In the first embodiment of the present invention, when the mobile station 1 requests the base station 2 to transmit uplink packet data (packet data from the mobile station 1 to the base station 2), the transmission data control unit 3 In response to the transmission request, the transmission power control unit 7 specifies the number of frames to be continuously transmitted and the step size (transmission power amplification width).

送信電力決定用パケット生成部４では、送信データ制御部３からの指示を受け、スロット毎にスロット番号等の識別情報を付加した送信電力決定用パケットを生成し、該送信電力決定用パケットをフレーム分割部５へ送る。フレーム分割部５において、上り無線フレーム（移動局１から基地局２への無線フレーム）を時分割的に複数スロットに分割し、選択部（ＳＥＬ）９を通して送信部８へ該送信電力決定用パケットを送る。送信部８では、スロット毎に送信電力を順次増加させて無線フレームとして該送信電力決定用パケットを基地局２へ送信する。   In response to an instruction from the transmission data control unit 3, the transmission power determination packet generation unit 4 generates a transmission power determination packet to which identification information such as a slot number is added for each slot, and the transmission power determination packet is framed. Send to the dividing unit 5. In the frame division unit 5, the uplink radio frame (radio frame from the mobile station 1 to the base station 2) is divided into a plurality of slots in a time division manner, and the transmission power determination packet is sent to the transmission unit 8 through the selection unit (SEL) 9. Send. The transmission unit 8 sequentially increases the transmission power for each slot and transmits the transmission power determination packet to the base station 2 as a radio frame.

基地局２では、受信部１２で上り無線フレームを受信し、フレーム分割部１３にて上り無線フレームをスロットに分割し、送信電力決定用パケット検出部１４にてスロット毎に送信電力決定用パケットの検出を行い、検出結果を送信データ制御部１５へ送る。送信データ制御部１５では、送信電力決定用パケットを検出した場合のみ、最初に検出したスロット番号に対応した識別情報（スロット番号等）を応答信号生成部１６へ送る。   In the base station 2, the reception unit 12 receives the uplink radio frame, the frame division unit 13 divides the uplink radio frame into slots, and the transmission power determination packet detection unit 14 determines the transmission power determination packet for each slot. Detection is performed, and the detection result is sent to the transmission data control unit 15. The transmission data control unit 15 sends identification information (slot number or the like) corresponding to the slot number detected first to the response signal generation unit 16 only when a transmission power determination packet is detected.

応答信号生成部１６では、上記の識別情報を付加した応答信号を生成し、送信部１７を通して下り無線フレーム（基地局２から移動局１への無線フレーム）として該応答信号を移動局１へ送信する。移動局１では、受信部１０において下り無線フレームを受信し、応答信号検出部１１にて基地局２からの応答信号の検出を行い、検出結果を送信データ制御部３へ送る。ここまでを送信電力決定の１試行とする。   The response signal generation unit 16 generates a response signal with the identification information added thereto, and transmits the response signal to the mobile station 1 as a downlink radio frame (a radio frame from the base station 2 to the mobile station 1) through the transmission unit 17. To do. In the mobile station 1, the reception unit 10 receives the downlink radio frame, the response signal detection unit 11 detects the response signal from the base station 2, and sends the detection result to the transmission data control unit 3. This is one trial for determining transmission power.

基地局２からの応答信号を検出した場合、送信データ制御部３は、応答信号に付加されている識別情報からこの応答信号に対応した送信電力決定用パケットの送信電力を求め、この送信電力で送信するよう送信電力制御部７に指示する。送信電力制御部７は、該指示された送信電力で、データ生成部６で生成されたメッセージ部を送信するよう、送信部８の送信電力を制御する。送信電力決定用パケットの送信とメッセージ部の送信との切替えは、送信データ制御部３の指示に応じて、送信電力決定用パケットとメッセージ部の何れか一方を選択する選択部（ＳＥＬ）９を切替えることで行う。   When detecting the response signal from the base station 2, the transmission data control unit 3 obtains the transmission power of the transmission power determination packet corresponding to this response signal from the identification information added to the response signal, and uses this transmission power. The transmission power control unit 7 is instructed to transmit. The transmission power control unit 7 controls the transmission power of the transmission unit 8 so that the message unit generated by the data generation unit 6 is transmitted with the instructed transmission power. Switching between transmission power determination packet transmission and message part transmission is performed by a selection unit (SEL) 9 that selects either the transmission power determination packet or the message part in accordance with an instruction from the transmission data control unit 3. This is done by switching.

１試行時間以内に基地局２からの応答信号が検出されない場合は、移動局１では、送信データ制御部３の指示により、送信電力制御部７を制御して送信電力を増加させて、２試行目の送信電力決定用パケットの送信を実行する。該２試行目の送信電力決定用パケットの送信も、１試行目の場合と同様に、送信電力決定用パケットを複数のスロットに分割し、スロット毎に送信電力を増加させた無線フレームとして基地局２に送信し、以降、基地局２からの応答信号が検出されるまで、送信電力を増加させながら送信電力決定用パケットの送信を繰り返し行う。なお、移動局１には、送信電力決定用パケットの初期送信電力、フレーム分割数又は送信電力増幅幅を変化させて設定する手段を備える。   If a response signal from the base station 2 is not detected within one trial time, the mobile station 1 controls the transmission power control unit 7 according to an instruction from the transmission data control unit 3 to increase the transmission power, and performs two trials. Transmission of the transmission power determination packet for the eye is executed. As in the case of the first trial, the transmission power determination packet for the second trial is also transmitted to the base station as a radio frame in which the transmission power determination packet is divided into a plurality of slots and the transmission power is increased for each slot. After that, until the response signal from the base station 2 is detected, the transmission power determination packet is repeatedly transmitted while increasing the transmission power. Note that the mobile station 1 includes means for changing and setting the initial transmission power, the number of frame divisions, or the transmission power amplification width of the transmission power determination packet.

図２は、本発明の第１実施形態による送信電力決定のタイムチャートを示す。同図の（ａ）は基地局から移動局へ送信される下りリンクの信号を示し、同図の（ｂ）は移動局から基地局へ送信される上りリンクの信号を示している。同図に示す例では、移動局から上りリンクによる１回目の送信電力決定用パケット（２−１）の送信において、該送信電力決定用パケットを５つのスロットに分割し、５段階のレベルに亘って順次増大する送信電力で送信電力決定用パケットを送信する。   FIG. 2 shows a time chart of transmission power determination according to the first embodiment of the present invention. (A) of the figure shows a downlink signal transmitted from the base station to the mobile station, and (b) of the figure shows an uplink signal transmitted from the mobile station to the base station. In the example shown in the figure, in the transmission of the first transmission power determination packet (2-1) by the uplink from the mobile station, the transmission power determination packet is divided into five slots and is divided into five levels. The transmission power determination packet is transmitted with transmission power that increases sequentially.

上記送信電力決定用パケット（２−１）に対して、基地局２では、３番目のスロットフレーム以降の送信電力決定用パケットが検出され、最初に検出したスロット番号に対応した識別情報（スロット番号“３”）を付加した応答信号（２−２）を移動局１に送信する。   In response to the transmission power determination packet (2-1), the base station 2 detects a transmission power determination packet after the third slot frame and identifies identification information (slot number) corresponding to the first detected slot number. A response signal (2-2) to which “3”) is added is transmitted to the mobile station 1.

移動局１では、下り無線フレームを受信し、基地局２からの応答信号（２−２）を検出し、該応答信号（２−２）に付加されている識別情報（スロット番号“３”）に対応した送信電力決定用パケットの送信電力で、メッセージ部（２−３）を送信するよう、送信電力を制御する。   In the mobile station 1, the downlink radio frame is received, the response signal (2-2) from the base station 2 is detected, and the identification information (slot number “3”) added to the response signal (2-2) The transmission power is controlled so that the message part (2-3) is transmitted with the transmission power of the transmission power determination packet corresponding to.

図３は本発明の第２の実施形態の機能ブロック図である。移動局１が基地局２に上りのパケットデータの送信を要求する場合、第１の実施形態と同様に、送信データ制御部３で送信要求を受け、連続送信するフレーム数、ステップサイズ（送信電力増幅幅）を送信電力制御部７に指定する。   FIG. 3 is a functional block diagram of the second embodiment of the present invention. When the mobile station 1 requests the base station 2 to transmit uplink packet data, as in the first embodiment, the transmission data control unit 3 receives a transmission request and continuously transmits the number of frames and step size (transmission power). Amplification width) is designated to the transmission power control unit 7.

送信電力決定用パケット生成部４では、第１の実施形態と同様に、送信データ制御部３からの指示を受け、スロット毎に送信電力決定用パケットを生成し、フレーム分割部５へ送り、フレーム分割部５において、上り無線フレームを複数スロットに分割し、選択部（ＳＥＬ）９を通して送信部８へ送る。   In the same way as in the first embodiment, the transmission power determination packet generation unit 4 receives an instruction from the transmission data control unit 3, generates a transmission power determination packet for each slot, sends it to the frame division unit 5, In the dividing unit 5, the uplink radio frame is divided into a plurality of slots and sent to the transmitting unit 8 through the selecting unit (SEL) 9.

送信部８では、第１の実施形態と同様に、スロット毎に送信電力を増加させて無線フレームとして基地局２へ送信する。基地局２では、第１の実施形態と同様に、受信部１２で上り無線フレームを受信し、フレーム分割部１３にて上り無線フレームをスロットに分割し、送信電力決定用パケット検出部１４にてスロット毎に検出を行い、検出結果を送信データ制御部１５へ送る。   As in the first embodiment, the transmission unit 8 increases the transmission power for each slot and transmits it to the base station 2 as a radio frame. In the base station 2, as in the first embodiment, the reception unit 12 receives the uplink radio frame, the frame division unit 13 divides the uplink radio frame into slots, and the transmission power determination packet detection unit 14 Detection is performed for each slot, and the detection result is sent to the transmission data control unit 15.

送信データ制御部１５では、送信電力決定用パケットを検出した場合のみ、該検出したスロット番号をフレーム分割部１８へ送る。フレーム分割部１８では、送信データ制御部１５で検出された送信電力決定用パケットのスロット番号に対応したタイミングで、応答信号生成部１６で作成された応答信号を無線フレームに載せ、送信部１７を通して下り無線フレームとして移動局１へ送信する。   The transmission data control unit 15 sends the detected slot number to the frame division unit 18 only when a transmission power determination packet is detected. The frame division unit 18 places the response signal created by the response signal generation unit 16 on the radio frame at a timing corresponding to the slot number of the transmission power determination packet detected by the transmission data control unit 15, and passes through the transmission unit 17. It transmits to the mobile station 1 as a downlink radio frame.

移動局１では、受信部１０において下り無線フレームを受信し、フレーム分割部１９でフレーム分割を行い、分割されたフレームを応答信号検出部１１へ送る。応答信号検出部１１では、分割フレーム毎に応答信号を検出し、検出結果を送信データ制御部３へ送る。ここまでを送信電力決定の１試行とする。   In the mobile station 1, the receiving unit 10 receives the downlink radio frame, the frame dividing unit 19 divides the frame, and sends the divided frame to the response signal detecting unit 11. The response signal detection unit 11 detects a response signal for each divided frame and sends the detection result to the transmission data control unit 3. This is one trial for determining transmission power.

基地局２からの応答信号を検出した場合は、応答信号を検出したタイミングに対応する送信電力を判定し、データ生成部６で生成されたメッセージ部を、この送信電力で送信する。１試行時間内に基地局２からの応答信号を検出しない場合は、送信電力を増加させ、２試行目を実施し、以降、基地局２からの応答信号が検出されるまで、送信電力決定用パケットの送信電力を増加させながら繰り返し試行する。なお、移動局１には、送信電力決定用パケットの初期送信電力、フレーム分割数又は送信電力増幅幅を変化させて設定する手段を備える。   When the response signal from the base station 2 is detected, the transmission power corresponding to the timing at which the response signal is detected is determined, and the message part generated by the data generation unit 6 is transmitted with this transmission power. When the response signal from the base station 2 is not detected within one trial time, the transmission power is increased, the second trial is performed, and thereafter the transmission power is determined until the response signal from the base station 2 is detected. Try repeatedly while increasing the transmission power of the packet. Note that the mobile station 1 includes means for changing and setting the initial transmission power, the number of frame divisions, or the transmission power amplification width of the transmission power determination packet.

図４は、本発明の第２実施形態による送信電力決定のタイムチャートを示す。同図の（ａ）は基地局から移動局へ送信される下りリンクの信号を示し、同図の（ｂ）は移動局から基地局へ送信される上りリンクの信号を示している。同図に示す例では、移動局から上りリンクによる１回目の送信電力決定用パケット（４−１）の送信において、該送信電力決定用パケットを５つのスロットに分割し、５段階のレベルに亘って順次増大する送信電力で送信電力決定用パケットを送信する。   FIG. 4 is a time chart for determining transmission power according to the second embodiment of the present invention. (A) of the figure shows a downlink signal transmitted from the base station to the mobile station, and (b) of the figure shows an uplink signal transmitted from the mobile station to the base station. In the example shown in the figure, in the transmission of the first transmission power determination packet (4-1) by the uplink from the mobile station, the transmission power determination packet is divided into five slots and is divided into five levels. The transmission power determination packet is transmitted with transmission power that increases sequentially.

上記送信電力決定用パケット（２−１）に対して、基地局２では、３番目のスロットフレーム以降の送信電力決定用パケットが検出されたとすると、該送信電力決定用パケットが検出されたスロット番号３以降の検出タイミングに対応したタイミングで、応答信号（４−１）を移動局１に送信する。なお、基地局２では応答信号の送信タイミングを５つのスロットに分割し、送信電力決定用パケット（２−１）が検出されたタイミングと対応したタイミングで応答信号（４−１）を下り無線フレームに載せて送信する。   If the transmission power determination packet after the third slot frame is detected in the base station 2 with respect to the transmission power determination packet (2-1), the slot number in which the transmission power determination packet is detected. A response signal (4-1) is transmitted to the mobile station 1 at a timing corresponding to the detection timing after 3. The base station 2 divides the transmission timing of the response signal into five slots, and sends the response signal (4-1) to the downlink radio frame at a timing corresponding to the timing at which the transmission power determination packet (2-1) is detected. Send it on.

移動局１では、下り無線フレームを受信し、基地局２からの応答信号（４−１）を検出し、該応答信号（４−１）の受信タイミングに応じて送信電力決定用パケットの送信電力を判定し、該送信電力でメッセージ部（４−２）を送信するよう、送信電力を制御する。   The mobile station 1 receives the downlink radio frame, detects the response signal (4-1) from the base station 2, and transmits the transmission power determination packet transmission power according to the reception timing of the response signal (4-1). And the transmission power is controlled so that the message part (4-2) is transmitted with the transmission power.

（付記１）
基地局と移動局との間でパケットデータの送受信を行う際に、移動局は、基地局へ送信する送信電力決定用パケットを複数の無線フレームに時分割的に分割し、かつ、分割したフレーム毎に送信電力を順次増加させて送信し、
基地局は、前記分割されたフレーム毎に送信電力決定用パケットの検出処理を行い、該送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を移動局に送信し、
前記移動局は、前記基地局からの応答信号に含まれる分割フレームの識別情報を基に送信電力を決定し、メッセージ部を該送信電力で送信することを特徴とする通信電力制御方法。
（付記２）
前記基地局は、送信電力決定用パケットが最初に検出された分割フレームの識別情報として、時分割的に分割された無線フレームのスロット番号を前記応答信号に付加し、
前記移動局は、基地局からの応答信号に含まれる前記スロット番号を基に送信電力を決定することを特徴とする付記１に記載の通信電力制御方法。
（付記３）
前記基地局は、送信電力決定用パケットが最初に検出された分割フレームの識別情報として、時分割的に分割された無線フレームの送信電力決定用パケットの検出タイミングに対応したタイミングで前記応答信号を送信し、
前記移動局は、前記応答信号の受信タイミングを基に送信電力を決定することを特徴とする付記１に記載の通信電力制御方法。
（付記４）
基地局へ送信する送信電力決定用パケットを複数の無線フレームに分割し、かつ、分割したフレーム毎に送信電力を増加させて送信する送信電力制御手段と、
基地局から送信され、前記送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を受信する応答信号検出手段と、
前記応答信号検出手段で検出された応答信号に含まれる分割フレームの識別情報を基に送信電力を決定し、メッセージ部を該送信電力で送信するよう送信電力を制御する前記送信電力制御手段と、
を備えたことを特徴とする移動局。
（付記５）
複数の無線フレームに分割され、かつ該無線フレーム毎に送信電力を増加させて移動局から送信された送信電力決定用パケットをフレーム毎に検出する送信電力決定用パケット検出手段と、
前記送信電力決定用パケット検出手段で最初に検出された送信電力決定用パケットの分割フレームの識別情報を応答信号に保有させる送信データ制御手段と、
前記を移動局に送信する手段と、
前記送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を送信する送信手段と、
を備えたことを特徴とする基地局。
（付記６）
前記基地局の送信データ制御手段は、送信電力決定用パケットが最初に検出された分割フレームの識別情報として、時分割的に分割された無線フレームのスロット番号を前記応答信号に付加する手段を備えたことを特徴とする付記５に記載の基地局。
（付記７）
前記基地局の送信データ制御手段は、送信電力決定用パケットが最初に検出された分割フレームの識別情報として、時分割的に分割された無線フレームの送信電力決定用パケットの検出タイミングに対応したタイミングで前記応答信号を送信する手段を備えたことを特徴とする付記５に記載の基地局。
（付記８）
前記移動局の応答信号検出手段は、基地局からの応答信号に含まれる分割フレームのスロット番号を検出する手段を有し、該移動局は該スロット番号を基に送信電力を決定することを特徴とする付記４に記載の移動局。
（付記９）
前記移動局の応答信号検出手段は、基地局からの応答信号の受信タイミングを検出する手段を有し、該移動局は該受信タイミングを基に送信電力を決定することを特徴とする付記４に記載の移動局。
（付記１０）
前記移動局は、送信電力決定用パケットの初期送信電力、フレーム分割数又は送信電力増幅幅を変化させて設定する手段を備えたことを特徴とする付記４記載の移動局。 (Appendix 1)
When transmitting and receiving packet data between the base station and the mobile station, the mobile station divides the transmission power determination packet to be transmitted to the base station into a plurality of radio frames in a time-sharing manner, and the divided frames Every time transmission power is sequentially increased and transmitted,
The base station performs transmission power determination packet detection processing for each of the divided frames, and transmits a response signal holding identification information of the divided frame in which the transmission power determination packet is first detected to the mobile station. ,
The communication power control method, wherein the mobile station determines transmission power based on identification information of a divided frame included in a response signal from the base station, and transmits a message part with the transmission power.
(Appendix 2)
The base station adds a slot number of a radio frame divided in a time division manner to the response signal as identification information of a divided frame in which a transmission power determination packet is first detected,
The communication power control method according to supplementary note 1, wherein the mobile station determines transmission power based on the slot number included in a response signal from a base station.
(Appendix 3)
The base station transmits the response signal at a timing corresponding to the detection timing of the transmission power determination packet of the radio frame divided in a time division manner as identification information of the divided frame in which the transmission power determination packet is first detected. Send
The communication power control method according to supplementary note 1, wherein the mobile station determines transmission power based on reception timing of the response signal.
(Appendix 4)
A transmission power control unit that divides a transmission power determination packet to be transmitted to a base station into a plurality of radio frames and increases transmission power for each divided frame, and
Response signal detection means for receiving a response signal transmitted from a base station and holding identification information of a divided frame in which the transmission power determination packet is first detected;
The transmission power control means for determining the transmission power based on the identification information of the divided frames included in the response signal detected by the response signal detection means, and for controlling the transmission power so as to transmit the message part at the transmission power;
A mobile station characterized by comprising:
(Appendix 5)
Transmission power determination packet detection means for detecting, for each frame, a transmission power determination packet that is divided into a plurality of radio frames and increases transmission power for each radio frame and transmitted from the mobile station;
Transmission data control means for causing the response signal to hold the identification information of the divided frame of the transmission power determination packet first detected by the transmission power determination packet detection means;
Means for transmitting said to a mobile station;
Transmitting means for transmitting a response signal having identification information of a divided frame in which the transmission power determination packet is first detected;
A base station characterized by comprising:
(Appendix 6)
The transmission data control means of the base station includes means for adding a slot number of a radio frame divided in a time division manner to the response signal as identification information of a divided frame in which a transmission power determination packet is first detected. The base station according to appendix 5, which is characterized in that
(Appendix 7)
The transmission data control means of the base station uses the timing corresponding to the detection timing of the transmission power determination packet of the radio frame divided in a time division manner as the identification information of the divided frame in which the transmission power determination packet is first detected. 6. The base station according to appendix 5, further comprising means for transmitting the response signal.
(Appendix 8)
The response signal detection means of the mobile station has means for detecting a slot number of a divided frame included in the response signal from the base station, and the mobile station determines transmission power based on the slot number. The mobile station according to Appendix 4.
(Appendix 9)
Appendix 4 characterized in that the response signal detection means of the mobile station has means for detecting the reception timing of the response signal from the base station, and the mobile station determines the transmission power based on the reception timing. The listed mobile station.
(Appendix 10)
The mobile station according to appendix 4, wherein the mobile station comprises means for changing and setting the initial transmission power, the number of frame divisions, or the transmission power amplification width of a transmission power determination packet.

本発明の第１の実施形態の機能ブロックを示す図である。It is a figure which shows the functional block of the 1st Embodiment of this invention. 本発明の第１実施形態による送信電力決定のタイムチャートを示す図である。It is a figure which shows the time chart of transmission power determination by 1st Embodiment of this invention. 本発明の第２の実施形態の機能ブロックを示す図である。It is a figure which shows the functional block of the 2nd Embodiment of this invention. 本発明の第２実施形態による送信電力決定のタイムチャートを示す図である。It is a figure which shows the time chart of transmission power determination by 2nd Embodiment of this invention. 従来の送信電力決定のタイムチャートを示す図である。It is a figure which shows the time chart of the conventional transmission power determination.

符号の説明Explanation of symbols

１ 移動局
２ 基地局
３ 送信データ制御部
４送信電力決定用パケット生成部
５ フレーム分割部
６ データ生成部
７ 送信電力制御部
８ 送信部
９ 選択部（ＳＥＬ）
１０ 受信部
１１ 応答信号検出部
１２ 受信部
１３ フレーム分割部
１４ 送信電力決定用パケット検出部
１５ 送信データ制御部
１６ 応答信号生成部
１７ 送信部
１８ フレーム分割部
１９ フレーム分割部 DESCRIPTION OF SYMBOLS 1 Mobile station 2 Base station 3 Transmission data control part 4 Transmission power determination packet generation part 5 Frame division part 6 Data generation part 7 Transmission power control part 8 Transmission part 9 Selection part (SEL)
DESCRIPTION OF SYMBOLS 10 Reception part 11 Response signal detection part 12 Reception part 13 Frame division part 14 Transmission power determination packet detection part 15 Transmission data control part 16 Response signal generation part 17 Transmission part 18 Frame division part 19 Frame division part

Claims (5)

基地局と移動局との間でパケットデータの送受信を行う際に、移動局は、基地局へ送信する送信電力決定用パケットを複数の無線フレームに時分割的に分割し、かつ、分割したフレーム毎に送信電力を順次増加させて送信し、
基地局は、前記分割されたフレーム毎に送信電力決定用パケットの検出処理を行い、該送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を移動局に送信し、
前記移動局は、前記基地局からの応答信号に含まれる分割フレームの識別情報を基に送信電力を決定し、メッセージ部を該送信電力で送信することを特徴とする通信電力制御方法。 When transmitting and receiving packet data between the base station and the mobile station, the mobile station divides the transmission power determination packet to be transmitted to the base station into a plurality of radio frames in a time-sharing manner, and the divided frames Every time transmission power is sequentially increased and transmitted,
The base station performs transmission power determination packet detection processing for each of the divided frames, and transmits a response signal holding identification information of the divided frame in which the transmission power determination packet is first detected to the mobile station. ,
The communication power control method, wherein the mobile station determines transmission power based on identification information of a divided frame included in a response signal from the base station, and transmits a message part with the transmission power. 前記基地局は、送信電力決定用パケットが最初に検出された分割フレームの識別情報として、時分割的に分割された無線フレームのスロット番号を前記応答信号に付加し、
前記移動局は、基地局からの応答信号に含まれる前記スロット番号を基に送信電力を決定することを特徴とする請求項１に記載の通信電力制御方法。 The base station adds a slot number of a radio frame divided in a time division manner to the response signal as identification information of a divided frame in which a transmission power determination packet is first detected,
The communication power control method according to claim 1, wherein the mobile station determines transmission power based on the slot number included in a response signal from a base station. 前記基地局は、送信電力決定用パケットが最初に検出された分割フレームの識別情報として、時分割的に分割された無線フレームの送信電力決定用パケットの検出タイミングに対応したタイミングで前記応答信号を送信し、
前記移動局は、前記応答信号の受信タイミングを基に送信電力を決定することを特徴とする請求項１に記載の通信電力制御方法。 The base station transmits the response signal at a timing corresponding to the detection timing of the transmission power determination packet of the radio frame divided in a time division manner as identification information of the divided frame in which the transmission power determination packet is first detected. Send
The communication power control method according to claim 1, wherein the mobile station determines transmission power based on a reception timing of the response signal. 基地局へ送信する送信電力決定用パケットを複数の無線フレームに分割し、かつ、分割したフレーム毎に送信電力を増加させて送信する送信電力制御手段と、
基地局から送信され、前記送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を受信する応答信号検出手段と、
前記応答信号検出手段で検出された応答信号に含まれる分割フレームの識別情報を基に送信電力を決定し、メッセージ部を該送信電力で送信するよう送信電力を制御する前記送信電力制御手段と、
を備えたことを特徴とする移動局。 A transmission power control unit that divides a transmission power determination packet to be transmitted to a base station into a plurality of radio frames and increases transmission power for each divided frame, and
Response signal detection means for receiving a response signal transmitted from a base station and holding identification information of a divided frame in which the transmission power determination packet is first detected;
The transmission power control means for determining the transmission power based on the identification information of the divided frames included in the response signal detected by the response signal detection means, and for controlling the transmission power so as to transmit the message part at the transmission power;
A mobile station characterized by comprising: 複数の無線フレームに分割され、かつ該無線フレーム毎に送信電力を増加させて移動局から送信された送信電力決定用パケットをフレーム毎に検出する送信電力決定用パケット検出手段と、
前記送信電力決定用パケット検出手段で最初に検出された送信電力決定用パケットの分割フレームの識別情報を応答信号に保有させる送信データ制御手段と、
前記を移動局に送信する手段と、
前記送信電力決定用パケットが最初に検出された分割フレームの識別情報を保有する応答信号を送信する送信手段と、
を備えたことを特徴とする基地局。 Transmission power determination packet detection means for detecting, for each frame, a transmission power determination packet that is divided into a plurality of radio frames and increases transmission power for each radio frame and transmitted from the mobile station;
Transmission data control means for causing the response signal to hold the identification information of the divided frame of the transmission power determination packet first detected by the transmission power determination packet detection means;
Means for transmitting said to a mobile station;
Transmitting means for transmitting a response signal having identification information of a divided frame in which the transmission power determination packet is first detected;
A base station characterized by comprising:
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JP2009206782A (en) * 2008-02-27 2009-09-10 Kyocera Corp Mobile station device and transmission power control method
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