JPH09275582A

JPH09275582A - Synchronization establishment method for spread code in mobile communication system, mobile station equipment and base station equipment

Info

Publication number: JPH09275582A
Application number: JP8084135A
Authority: JP
Inventors: Takehiro Nakamura; 武宏中村; Nobuhiro Nakano; 悦宏中野
Original assignee: Nippon Telegraph and Telephone Corp; NTT Mobile Communications Networks Inc
Current assignee: NTT Docomo Inc; Nippon Telegraph and Telephone Corp
Priority date: 1996-04-05
Filing date: 1996-04-05
Publication date: 1997-10-21
Anticipated expiration: 2016-04-05
Also published as: JP3313573B2

Abstract

PROBLEM TO BE SOLVED: To conduct soft hand-over quickly and efficiently by conducting measurement and notice of phase relation information in advance. SOLUTION: A phase relation information measurement circuit 13 of a mobile station measures a phase relation between a spread code of a radio channel with a soft hand-over destination base station before start of soft hand-over and a spread code of a radio channel with a soft hand-over source base station during communication and stores the result to a memory 21 and informs it to the soft hand-over source base station, in which it is stored. In the case of start of soft hand-over, the soft hand-over source base station informs phase relation information to the soft hand-over destination base station, which sets up synchronization of an incoming radio channel based on the phase relation information.

Description

Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、スペクトル拡散コ
ードを用いた符号分割多元接続（以下、ＣＤＭＡと略称
する）方式の移動通信システムにおいてソフトハンドオ
ーバー時におけるソフトハンドオーバー先無線回線の拡
散コードの同期を確立する移動通信システムにおける拡
散コードの同期確立方法および移動局装置と基地局装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spread code of a soft handover destination radio line at the time of soft handover in a code division multiple access (hereinafter abbreviated as CDMA) type mobile communication system using a spread spectrum code. The present invention relates to a spread code synchronization establishing method, a mobile station apparatus and a base station apparatus in a mobile communication system for establishing synchronization.

【０００２】[0002]

【従来の技術】ＣＤＭＡ方式の移動通信システムにおけ
るソフトハンドオーバー起動時には、ソフトハンドオー
バー先基地局の無線回線の同期を確立するために、移動
局はソフトハンドオーバー先基地局の無線回線の拡散コ
ードと通信中のソフトハンドオーバー元基地局との無線
回線の拡散コードの位相関係情報を測定し、この測定値
をソフトハンドオーバー元基地局を介してソフトハンド
オーバー先基地局に通知することが必要である（特願平
６−１１０８３３号参照）。2. Description of the Related Art When a soft handover is activated in a CDMA mobile communication system, the mobile station establishes synchronization of the radio channel of the soft handover destination base station with the mobile station spreading code of the radio channel of the soft handover destination base station. It is necessary to measure the phase relationship information of the spreading code of the wireless link with the soft handover source base station that is communicating with and to notify this measurement value to the soft handover destination base station via the soft handover source base station. (See Japanese Patent Application No. 6-110833).

【０００３】従来、この位相関係情報の測定および通知
は、ソフトハンドオーバーを起動する毎に行っている。
具体的には、図４のソフトハンドオーバー制御シーケン
スに示すように、ソフトハンドオーバー元基地局はサイ
ト内セクタ間またはサイト間ソフトハンドオーバーを移
動局から起動されると、位相関係情報を測定する要求を
移動局に対して行い、移動局に位相関係情報の測定を行
わせる。移動局は、位相関係情報を測定すると、この測
定値をソフトハンドオーバー元基地局に返送する。Conventionally, the measurement and notification of the phase relation information is performed every time the soft handover is activated.
Specifically, as shown in the soft handover control sequence of FIG. 4, the soft handover source base station measures the phase relation information when the intra-site sector or inter-site soft handover is activated by the mobile station. A request is made to the mobile station to cause the mobile station to measure the phase relation information. After measuring the phase relation information, the mobile station returns this measurement value to the soft handover source base station.

【０００４】ソフトハンドオーバー元基地局は、移動局
から位相関係情報の測定値を受け取ると、この位相関係
情報をソフトハンドオーバー先基地局に通知する。ソフ
トハンドオーバー先基地局は、周波数、上り下り拡散コ
ードを選択し、前記位相関係情報に従って下り通信チャ
ネルで送信開始するとともに、前記位相関係情報を用い
て上り通信チャネルの同期を待つ。すなわち、ソフトハ
ンドオーバー先基地局は移動局が上り通信チャネルの送
信を開始するのを待機する。Upon receiving the measurement value of the phase relation information from the mobile station, the soft handover source base station notifies the soft handover destination base station of the phase relation information. The soft handover destination base station selects a frequency and an uplink / downlink spreading code, starts transmission on the downlink communication channel according to the phase relationship information, and waits for synchronization of the uplink communication channel using the phase relationship information. That is, the soft handover destination base station waits for the mobile station to start transmitting the uplink communication channel.

【０００５】また、ソフトハンドオーバー先基地局は、
選択した下り通信チャネルの拡散コード等を無線チャネ
ル指定要求信号に含ませてソフトハンドオーバー元基地
局に送信し、ソフトハンドオーバー元基地局は該ソフト
ハンドオーバー先無線チャネル指定信号を移動局に通知
する。移動局は前記位相関係情報に従って下り通信チャ
ネルを受信して同期を確立し、それから上り通信チャネ
ルでの送信を開始する。Further, the soft handover destination base station is
The spread code of the selected downlink communication channel is included in the radio channel designation request signal and transmitted to the soft handover source base station, and the soft handover source base station notifies the mobile station of the soft handover destination radio channel designation signal. To do. The mobile station receives the downlink communication channel according to the phase relation information, establishes synchronization, and then starts transmission on the uplink communication channel.

【０００６】ソフトハンドオーバー先基地局は、移動局
が上り通信チャネルでの送信を開始すると、前記位相関
係情報に従って上り通信チャネルの同期を確立する。こ
こで、上り通信チャネルについては、移動局から新たに
送信せず、ハンドオーバー先基地局は既にハンドオーバ
ー元基地局に対して送信されている上り通信チャネルの
同期を確立することとしてもよい。When the mobile station starts transmission on the uplink communication channel, the soft handover destination base station establishes synchronization of the uplink communication channel according to the phase relationship information. Here, the uplink communication channel may not be newly transmitted from the mobile station, and the handover destination base station may establish synchronization of the uplink communication channel already transmitted to the handover source base station.

【０００７】このように、位相関係情報の測定および通
知は、従来、ソフトハンドオーバーを起動する毎に行っ
ているが、この位相関係情報の測定には例えば数秒程度
の処理時間を必要とするため、ソフトハンドオーバー制
御に遅延を招き、適切なハンドオーバータイミングでハ
ンドオーバーを開始できない。As described above, conventionally, the measurement and notification of the phase relation information is performed every time the soft handover is started. However, since the measurement of the phase relation information requires a processing time of about several seconds, for example. However, soft handover control is delayed, and handover cannot be started at an appropriate handover timing.

【０００８】また、ソフトハンドオーバーの起動と終了
がばたついた場合には、このばたついた起動毎に測定す
ることになる。ところで、ソフトハンドオーバー先無線
回線の同期を確立するには、同期確立処理時間上、位相
関係情報の測定値と実際の値との誤差は１シンボル程度
まで容認することができる。１シンボルの位相差は移動
局の移動距離に換算すると数ｋｍに相当する。従って、
移動局が数ｋｍ移動する毎に位相関係情報を測定すれば
よく、頻繁に測定する必要はない。すなわち、ソフトハ
ンドオーバーの起動と終了がばたついた場合には、該起
動毎に位相関係情報を測定することは無駄なことであ
り、移動局の処理負荷を増加させ、基地局に通知するた
めの制御信号により制御トラヒックを圧迫する。Further, when the activation and termination of the soft handover flutters, the measurement is performed for each fluttering activation. By the way, in order to establish the synchronization of the soft handover destination wireless line, the error between the measured value and the actual value of the phase relation information can be allowed up to about 1 symbol in the synchronization establishment processing time. The phase difference of one symbol corresponds to several km when converted to the moving distance of the mobile station. Therefore,
It suffices to measure the phase relation information every time the mobile station moves several kilometers, and it is not necessary to measure it frequently. That is, when the activation and termination of the soft handover fluctuate, it is useless to measure the phase relation information for each activation, which increases the processing load of the mobile station and notifies the base station. The control signal for compresses the control traffic.

【０００９】[0009]

【発明が解決しようとする課題】上述したように、従来
は、位相関係情報の測定および通知をソフトハンドオー
バーの起動毎に行うために、ソフトハンドオーバー制御
に遅延を招き、適切なハンドオーバータイミングでハン
ドオーバーを開始できないという問題がある。As described above, in the related art, since the measurement and notification of the phase relation information are performed every time the soft handover is started, the soft handover control is delayed, and the appropriate handover timing is generated. However, there is a problem that handover cannot be started.

【００１０】また、従来は、ソフトハンドオーバーの起
動と終了がばたついた場合にも、その都度位相関係情報
を測定しているため、移動局の処理負荷を増加させ、基
地局に通知するための制御信号により制御トラヒックを
圧迫するという問題がある。Further, conventionally, even when the start and end of soft handover fluctuate, the phase relation information is measured each time, so the processing load of the mobile station is increased and the base station is notified. There is a problem that the control traffic is compressed by the control signal for

【００１１】本発明は、上記に鑑みてなされたもので、
その目的とするところは、位相関係情報の測定および通
知を事前に行うことによりソフトハンドオーバーを迅速
かつ効率的に行い得る移動通信システムにおける拡散コ
ードの同期確立方法および移動局装置と基地局装置を提
供することにある。[0011] The present invention has been made in view of the above,
The purpose thereof is to provide a spreading code synchronization establishing method, a mobile station device and a base station device in a mobile communication system capable of performing soft handover quickly and efficiently by measuring and notifying phase relation information in advance. To provide.

【００１２】[0012]

【課題を解決するための手段】上記目的を達成するた
め、請求項１記載の本発明は、符号分割多元接続方式の
移動通信システムにおいてソフトハンドオーバー時にお
けるソフトハンドオーバー先無線回線の拡散コードの同
期を確立する方法であって、移動局はソフトハンドオー
バー起動より前にソフトハンドオーバー先基地局との無
線回線の拡散コードと通信中のソフトハンドオーバー元
基地局との無線回線の拡散コードの位相関係を測定し、
移動局はこの測定した位相関係情報を記憶するととも
に、ソフトハンドオーバー元基地局に通知して記憶させ
ておき、ソフトハンドオーバー起動時、ソフトハンドオ
ーバー元基地局はソフトハンドオーバー先基地局に対し
て前記記憶した位相関係情報を通知し、ソフトハンドオ
ーバー先基地局は前記通知された位相関係情報に基づい
て前記移動局からの上り無線回線の同期を確立すること
を要旨とする。In order to achieve the above object, the present invention according to claim 1 provides a spreading code of a soft handover destination radio line at a soft handover in a code division multiple access mobile communication system. A method for establishing synchronization, in which the mobile station uses the spreading code of the wireless channel with the soft handover destination base station and the spreading code of the wireless channel with the soft handover source base station in communication before the soft handover is activated. Measure the phase relationship,
The mobile station stores the measured phase relationship information and notifies the soft handover source base station to store it.When the soft handover is activated, the soft handover source base station sends the soft handover destination base station to the soft handover destination base station. The stored phase relation information is notified, and the soft handover destination base station establishes the synchronization of the uplink radio channel from the mobile station based on the notified phase relation information.

【００１３】請求項１記載の本発明にあっては、移動局
はソフトハンドオーバー起動より前にソフトハンドオー
バー先基地局との無線回線の拡散コードと通信中のソフ
トハンドオーバー元基地局との無線回線の拡散コードの
位相関係を測定して記憶するとともに、ソフトハンドオ
ーバー元基地局に通知して記憶させておき、ソフトハン
ドオーバー起動時、ソフトハンドオーバー元基地局はソ
フトハンドオーバー先基地局に対して位相関係情報を通
知し、ソフトハンドオーバー先基地局は該位相関係情報
に基づいて上り無線回線の同期を確立する。According to the present invention of claim 1, the mobile station establishes a spreading code of a radio channel with the soft handover destination base station and a soft handover source base station in communication before the soft handover is activated. The phase relationship of the spreading code of the wireless link is measured and stored, and the soft handover source base station is notified and stored so that the soft handover source base station is the soft handover destination base station. To the base station of the soft handover destination, and the base station of the soft handover destination establishes the synchronization of the uplink radio channel based on the phase relation information.

【００１４】また、請求項２記載の本発明は、符号分割
多元接続方式の移動通信システムにおいてソフトハンド
オーバー時におけるソフトハンドオーバー先無線回線の
拡散コードの同期を確立する方法であって、各基地局は
それぞれ異なって割り当てられた独自の拡散コードで拡
散されたパイロットチャネルを生成し、該パイロットチ
ャネルに自分の通信チャネルの拡散コードの位相情報を
含ませて常時送信し、ソフトハンドオーバー元基地局と
通信中の移動局はソフトハンドオーバーの起動より前
に、周辺セルの各基地局から送信されているパイロット
チャネルに含まれている通信チャネルの拡散コードの位
相情報を順次受信し、この位相情報と移動局が通信中の
ソフトハンドオーバー元基地局との上り通信チャネルの
拡散コードの位相との関係を測定するとともに、前記位
相情報に対応するタイミングと前記上り通信チャネルの
タイミングとの時間関係を測定し、これらの測定した位
相関係および時間関係を位相関係情報として記憶すると
ともに、ソフトハンドオーバー元基地局に通知して記憶
させておき、ソフトハンドオーバー起動時、ソフトハン
ドオーバー元基地局はソフトハンドオーバー先基地局に
対して前記記憶した位相関係情報を通知し、ソフトハン
ドオーバー先基地局は前記通知された位相関係情報に基
づいて前記移動局からの上り無線回線の同期を確立する
ことを要旨とする。Further, the present invention according to claim 2 is a method for establishing synchronization of spreading codes of a soft handover destination wireless line at the time of soft handover in a code division multiple access mobile communication system. Each station generates a pilot channel spread by a unique spreading code assigned differently, always transmits the pilot channel by including the phase information of the spreading code of its own communication channel, and the soft handover source base station Before the soft handover is activated, the mobile station communicating with the mobile station sequentially receives the phase information of the spreading code of the communication channel contained in the pilot channel transmitted from each base station of the neighboring cells. And the phase of the spreading code of the uplink communication channel with the soft handover source base station during communication between the mobile station and In addition to measuring the relationship, the time relationship between the timing corresponding to the phase information and the timing of the upstream communication channel is measured, and the measured phase relationship and time relationship are stored as phase relationship information, and the soft handover source The base station is notified and stored, and when the soft handover is activated, the soft handover source base station notifies the soft handover destination base station of the stored phase relation information, and the soft handover destination base station The gist is to establish the synchronization of the uplink radio line from the mobile station based on the notified phase relation information.

【００１５】請求項２記載の本発明にあっては、ソフト
ハンドオーバー元基地局と通信中の移動局はソフトハン
ドオーバーの起動より前に、周辺セルの各基地局から送
信されているパイロットチャネルに含まれている通信チ
ャネルの拡散コードの位相情報を順次受信し、この位相
情報と通信中のソフトハンドオーバー元基地局との上り
通信チャネルの拡散コードの位相との関係から両者の位
相関係および時間関係を位相関係情報として記憶すると
ともにソフトハンドオーバー元基地局に通知して記憶さ
せておき、ソフトハンドオーバー起動時、ソフトハンド
オーバー元基地局はソフトハンドオーバー先基地局に対
して位相関係情報を通知し、ソフトハンドオーバー先基
地局は位相関係情報に基づいて上り無線回線の同期を確
立する。According to another aspect of the present invention, the mobile station communicating with the soft handover source base station has a pilot channel transmitted from each base station of the peripheral cell before the soft handover is activated. The phase information of the spreading code of the communication channel included in is sequentially received, and the phase relationship between the phase information and the spreading code of the uplink communication channel of the soft handover source base station during communication is The time relationship is stored as phase relationship information and is notified to the soft handover source base station and stored therein.When the soft handover is activated, the soft handover source base station notifies the soft handover destination base station of the phase relationship information. Is notified, and the soft handover destination base station establishes synchronization of the uplink wireless line based on the phase relation information.

【００１６】更に、請求項３記載の本発明は、請求項１
または２記載の発明において、移動局が位相関係情報の
測定および通知を発着信接続直後に行うことを要旨とす
る。Further, the present invention according to claim 3 provides the invention according to claim 1.
Alternatively, in the invention described in 2, the gist is that the mobile station measures and notifies the phase-related information immediately after the outgoing / incoming call connection.

【００１７】請求項４記載の本発明は、請求項２記載の
発明において、移動局が周辺セルの各基地局からのパイ
ロットチャネルの受信レベルを測定し、この測定した受
信レベルのうちソフトハンドオーバーが許容される所定
の上位の受信レベルの基地局のパイロットチャネルにつ
いてのみ前記位相関係情報の測定および通知を行うこと
を要旨とする。According to the present invention of claim 4, in the invention of claim 2, the mobile station measures the reception level of the pilot channel from each base station of the peripheral cell, and the soft handover is carried out among the measured reception levels. The point is that the above-mentioned phase relation information is measured and notified only for the pilot channel of the base station of a predetermined higher reception level that is allowed.

【００１８】また、請求項５記載の本発明は、請求項２
記載の発明において、移動局が周辺セルの各基地局から
のパイロットチャネルの受信レベルを測定し、この測定
した受信レベルのうちソフトハンドオーバーが許容され
る所定の受信レベル以上の基地局のパイロットチャネル
についてのみ前記位相関係情報の測定および通知を行う
ことを要旨とする。The present invention according to claim 5 provides the invention according to claim 2.
In the invention described above, a mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and among the measured reception levels, a pilot channel of a base station of a predetermined reception level or more at which soft handover is allowed It is a gist to measure and notify the above-mentioned phase relation information only for.

【００１９】更に、請求項６記載の本発明は、請求項２
記載の発明において、移動局が周辺セルの各基地局から
のパイロットチャネルの受信レベルを測定し、この測定
した受信レベルのうちソフトハンドオーバーが許容され
る所定の上位の受信レベルのまたは所定の受信レベル以
上の基地局のパイロットチャネルに、前記位相関係情報
の測定が未測定のパイロットチャネルが加わった時点、
もしくは前記位相関係情報の測定を前回実行してから所
定時間以上経過しているパイロットチャネルが加わった
時点で該未測定のパイロットチャネルについて前記位相
関係情報の測定および通知を行うことを要旨とする。Furthermore, the present invention according to claim 6 is the same as claim 2
In the invention described above, a mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and among the measured reception levels, a predetermined higher reception level or a predetermined reception level in which soft handover is allowed. To the pilot channel of the base station of the level or higher, when the measurement of the phase relation information has been added to the unmeasured pilot channel,
Alternatively, it is a gist to perform measurement and notification of the phase-related information on the unmeasured pilot channel when a pilot channel that has passed a predetermined time or more since the previous measurement of the phase-related information is added.

【００２０】請求項７記載の本発明は、請求項２記載の
発明において、移動局が周辺セルの各基地局からのパイ
ロットチャネルの受信レベルを測定し、この測定した受
信レベルのうちソフトハンドオーバーが許容される所定
の上位の受信レベルのまたは所定の受信レベル以上の基
地局のパイロットチャネルにおいて前回測定した受信レ
ベルが所定の値以上変化したパイロットチャネルについ
て前記位相関係情報の測定および通知を行うことを要旨
とする。According to the present invention of claim 7, in the invention of claim 2, the mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and a soft handover is performed from the measured reception levels. Is allowed to measure or notify the phase-related information of a pilot channel whose reception level measured last time in a pilot channel of a base station having a higher reception level or higher than a predetermined reception level has changed by a predetermined value or more. Is the gist.

【００２１】また、請求項８記載の本発明は、請求項２
記載の発明において、移動局が周辺セルの各基地局から
のパイロットチャネルの受信レベルを測定し、この測定
した受信レベルのうちソフトハンドオーバーが許容され
る所定の上位の受信レベルのまたは所定の受信レベル以
上の基地局のパイロットチャネルについて所定の時間毎
に前記位相関係情報の測定および通知を行うことを要旨
とする。Further, the present invention according to claim 8 is directed to claim 2
In the invention described above, a mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and among the measured reception levels, a predetermined higher reception level or a predetermined reception level in which soft handover is allowed. The gist of the present invention is to measure and notify the above-mentioned phase-related information at predetermined time intervals for pilot channels of base stations of a level or higher.

【００２２】更に、請求項９記載の本発明は、請求項２
記載の発明において、移動局が前記測定を随時行い、以
前基地局に通知した位相関係情報と最新に測定した位相
関係情報との差が所定値以上となった時に該最新の位相
関係情報をソフトハンドオーバー元基地局に通知するこ
とを要旨とする。Further, the present invention according to claim 9 provides the invention according to claim 2.
In the invention described, the mobile station performs the measurement at any time, and when the difference between the phase relationship information previously notified to the base station and the latest measured phase relationship information is equal to or more than a predetermined value, the latest phase relationship information is softened. The main point is to notify the handover source base station.

【００２３】請求項１０記載の本発明は、ソフトハンド
オーバー時におけるソフトハンドオーバー先無線回線の
拡散コードの同期を確立する符号分割多元接続方式の移
動通信システムにおいて、移動局装置がソフトハンドオ
ーバー起動より前にソフトハンドオーバー先基地局との
無線回線の拡散コードと通信中のソフトハンドオーバー
元基地局との無線回線の拡散コードの位相関係を測定す
る測定手段と、該測定回路で測定した位相関係情報を記
憶する記憶手段と、該記憶手段に記憶した位相関係情報
をソフトハンドオーバー元基地局に通知する通知手段と
を有し、ソフトハンドオーバー元基地局装置が前記移動
局の通知手段から通知された前記位相関係情報を記憶す
る記憶手段と、ソフトハンドオーバー起動時、前記記憶
手段に記憶した位相関係情報をソフトハンドオーバー先
基地局に通知する通知手段とを有し、ソフトハンドオー
バー先基地局装置が前記ソフトハンドオーバー元基地局
の通知手段から通知された前記位相関係情報に基づいて
前記移動局からの上り無線回線の同期を確立する同期確
立手段を有することを要旨とする。The present invention according to claim 10 is a code division multiple access mobile communication system for establishing synchronization of spreading codes of a soft handover destination radio line at the time of soft handover, in which the mobile station apparatus starts soft handover. Before that, the measuring means for measuring the phase relationship between the spreading code of the wireless line with the soft handover destination base station and the spreading code of the wireless line with the soft handover source base station in communication, and the phase measured by the measuring circuit And a notification means for notifying the soft handover source base station of the phase relationship information stored in the storage means, and the soft handover source base station device is provided from the notification means of the mobile station. A storage unit that stores the notified phase relationship information, and a storage unit that stores the phase relationship information when the soft handover is activated. Notification means for notifying related information to the soft handover destination base station, and the soft handover destination base station device is configured to move based on the phase relationship information notified from the notification means of the soft handover source base station. The gist is to have a synchronization establishing means for establishing synchronization of the uplink wireless line from the station.

【００２４】また、請求項１１記載の本発明は、ソフト
ハンドオーバー時におけるソフトハンドオーバー先無線
回線の拡散コードの同期を確立する符号分割多元接続方
式の移動通信システムにおいて、基地局装置が各自に異
なって割り当てられた独自の拡散コードで拡散されたパ
イロットチャネルを生成し、該パイロットチャネルに自
分の通信チャネルの拡散コードの位相情報を含ませて常
時送信する送信手段を有し、移動局装置がソフトハンド
オーバー起動より前に、周辺セルの各基地局から送信さ
れているパイロットチャネルに含まれている通信チャネ
ルの拡散コードの位相情報を順次受信する受信手段と、
該受信手段で受信した前記位相情報と移動局が通信中の
ソフトハンドオーバー元基地局との上り通信チャネルの
拡散コードの位相との関係の測定、および前記位相情報
に対応するタイミングと前記上り通信チャネルのタイミ
ングとの時間関係の測定を行う位相関係情報測定手段
と、該位相関係情報測定手段で測定した位相関係および
時間関係を位相関係情報として記憶する記憶手段と、該
記憶手段に記憶した前記位相関係情報をソフトハンドオ
ーバー元基地局に通知する通知手段とを有し、ソフトハ
ンドオーバー元基地局装置が前記通知手段から通知され
た前記位相関係情報を記憶する記憶手段と、該記憶手段
に記憶した前記位相関係情報をソフトハンドオーバー起
動時ソフトハンドオーバー先基地局に通知する通知手段
とを有し、ソフトハンドオーバー先基地局がソフトハン
ドオーバー元基地局の前記通知手段から通知された位相
関係情報に基づいて前記移動局からの上り無線回線の同
期を確立する同期確立手段を有することを要旨とする。According to the present invention of claim 11, in a mobile communication system of a code division multiple access system for establishing synchronization of spreading codes of a soft handover destination wireless line at the time of soft handover, each base station device has its own The mobile station apparatus has a transmission unit that generates a pilot channel spread by differently assigned unique spreading codes and always transmits the pilot channel by including the phase information of the spreading code of its own communication channel. Receiving means for sequentially receiving the phase information of the spreading code of the communication channel included in the pilot channel transmitted from each base station of the peripheral cell before the activation of the soft handover,
Measurement of the relationship between the phase information received by the receiving means and the phase of the spreading code of the uplink communication channel with the soft handover source base station with which the mobile station is communicating, and the timing corresponding to the phase information and the uplink communication Phase relationship information measuring means for measuring time relationship with channel timing, storage means for storing the phase relationship and time relationship measured by the phase relationship information measuring means as phase relationship information, and the storage means stored in the storage means. Storage means for notifying the soft handover source base station of the phase relation information, wherein the soft handover source base station device stores the phase relation information notified from the notifying means, and the storage means And a notification means for notifying the stored phase relation information to the soft handover destination base station at the time of soft handover activation. -Over destination base station is summarized in that with a synchronization establishing means for establishing synchronization of the uplink radio channel from the mobile station on the basis of the phase relation information notified from the notification unit of the soft handover source base station.

【００２５】更に、請求項１２記載の本発明は、請求項
１０または１１記載の発明において、移動局装置が前記
位相関係情報の測定および通知を発着信接続直後に行う
ように制御する制御手段を有することを要旨とする。Furthermore, the present invention according to claim 12 is the invention according to claim 10 or 11, further comprising a control means for controlling the mobile station device to perform the measurement and notification of the phase relation information immediately after the outgoing / incoming call connection. Having it is the gist.

【００２６】請求項１３記載の本発明は、請求項１１記
載の発明において、移動局装置が周辺セルの各基地局か
らのパイロットチャネルの受信レベルを測定する受信レ
ベル測定手段と、この測定した受信レベルを記憶する受
信レベル記憶手段と、この記憶された受信レベルのうち
ソフトハンドオーバーが許容される所定の上位の受信レ
ベルの基地局のパイロットチャネルについてのみ前記位
相関係情報の測定および通知を行うように制御する制御
手段とを有することを要旨とする。According to a thirteenth aspect of the present invention, in the eleventh aspect of the present invention, the mobile station device measures the reception level of the pilot channel from each base station of the peripheral cell, and the measured reception level. A reception level storing means for storing the level, and for measuring and notifying the phase relation information only for a pilot channel of a base station having a predetermined upper reception level which allows soft handover among the stored reception levels. The gist of the present invention is to have control means for controlling.

【００２７】また、請求項１４記載の本発明は、請求項
１１記載の発明において、移動局装置が周辺セルの各基
地局からのパイロットチャネルの受信レベルを測定する
受信レベル測定手段と、この測定した受信レベルを記憶
する受信レベル記憶手段と、この記憶された受信レベル
のうちソフトハンドオーバーが許容される所定の受信レ
ベル以上の基地局のパイロットチャネルについてのみ前
記位相関係情報の測定および通知を行うように制御する
制御手段とを有することを要旨とする。Further, the present invention according to claim 14 is, in the invention according to claim 11, a reception level measuring means for measuring a reception level of a pilot channel from each base station of a peripheral cell by the mobile station device, and this measurement. And a reception level storing means for storing the received reception level, and measuring and notifying the phase relation information only for the pilot channel of the base station having a predetermined reception level or more which allows soft handover among the stored reception levels. The gist of the present invention is to have control means for controlling the above.

【００２８】更に、請求項１５記載の本発明は、請求項
１１記載の発明において、移動局装置が周辺セルの各基
地局からのパイロットチャネルの受信レベルを測定する
受信レベル測定手段と、この測定した受信レベルを記憶
する受信レベル記憶手段と、この記憶された受信レベル
のうちソフトハンドオーバーが許容される所定の上位の
受信レベルのまたは所定の受信レベル以上の基地局のパ
イロットチャネルに、前記位相関係情報の測定が未測定
のパイロットチャネルが加わった時点、もしくは前記位
相関係情報の測定を前回実行してから所定時間以上経過
しているパイロットチャネルが加わった時点で該未測定
のパイロットチャネルについて前記位相関係情報の測定
および通知を行うように制御する制御手段とを有するこ
とを要旨とする。Further, the invention according to claim 15 is the invention according to claim 11, wherein the mobile station device measures the reception level of the pilot channel from each base station of the peripheral cell, and the measurement. The reception level storing means for storing the received reception level, and the phase to the pilot channel of a base station of a predetermined higher reception level or a predetermined reception level or more of which the soft handover is allowed among the stored reception levels. When the unmeasured pilot channel is added to the measurement of the related information, or when the pilot channel that has passed a predetermined time or more since the previous measurement of the phase relation information is added The gist of the present invention is to have control means for controlling to measure and notify the phase relation information.

【００２９】請求項１６記載の本発明は、請求項１１記
載の発明において、移動局装置が周辺セルの各基地局か
らのパイロットチャネルの受信レベルを測定する受信レ
ベル測定手段と、この測定した受信レベルを記憶する記
憶手段と、この記憶された受信レベルのうちソフトハン
ドオーバーが許容される所定の上位の受信レベルのまた
は所定の受信レベル以上の基地局のパイロットチャネル
において前回測定した受信レベルが所定の値以上変化し
たパイロットチャネルについて前記位相関係情報の測定
および通知を行うように制御する制御手段とを有するこ
とを要旨とする。According to a sixteenth aspect of the present invention, in the invention according to the eleventh aspect, the mobile station device measures the reception level of the pilot channel from each base station of the peripheral cell, and the measured reception level. A storage means for storing the level, and a reception level previously measured in a pilot channel of a base station of a predetermined higher reception level or a predetermined reception level or more of which the soft handover is allowed among the stored reception levels is predetermined. And a control means for controlling so as to measure and notify the phase-related information for a pilot channel that has changed by a value of or more.

【００３０】また、請求項１７記載の本発明は、請求項
１１記載の発明において、移動局装置が周辺セルの各基
地局からのパイロットチャネルの受信レベルを測定する
受信レベル測定手段と、この測定した受信レベルを記憶
する受信レベル記憶手段と、この記憶された受信レベル
のうちソフトハンドオーバーが許容される所定の上位の
受信レベルのまたは所定の受信レベル以上の基地局のパ
イロットチャネルについて所定の時間毎に前記位相関係
情報の測定および通知を行うように制御する制御手段と
を有することを要旨とする。The invention according to claim 17 is the invention according to claim 11, wherein the mobile station apparatus measures the reception level of the pilot channel from each base station of the peripheral cell, and this measurement. A reception level storing means for storing the received reception level, and a predetermined time for a pilot channel of a base station of a predetermined higher reception level or a predetermined reception level or more which allows soft handover among the stored reception levels. The gist of the present invention is to have a control unit that controls to measure and notify the phase relationship information for each.

【００３１】更に、請求項１８記載の本発明は、請求項
１１記載の発明において、移動局装置が前記位相関係情
報の測定を随時行うように制御する測定制御手段と、以
前基地局に通知した位相関係情報と最新に測定した位相
関係情報との差が所定値以上となった時に該最新の位相
関係情報をソフトハンドオーバー元基地局に通知するよ
うに前記通知手段を制御する通知制御手段とを有するこ
とを要旨とする。Further, the present invention according to claim 18 is the invention according to claim 11, wherein the mobile station device controls the measurement control means to perform the measurement of the phase relation information at any time, and previously notified the base station. Notification control means for controlling the notification means so as to notify the soft handover source base station of the latest phase relationship information when the difference between the phase relationship information and the latest measured phase relationship information becomes a predetermined value or more; It is a gist to have.

【００３２】[0032]

【発明の実施の形態】本発明の移動通信システムにおけ
る拡散コードの同期確立方法は、ＣＤＭＡ方式の移動通
信システムにおけるソフトハンドオーバー起動時にソフ
トハンドオーバー先基地局の通信チャネルの同期を迅速
かつ効率的に確立しようとするものである。BEST MODE FOR CARRYING OUT THE INVENTION A spread code synchronization establishing method in a mobile communication system according to the present invention enables quick and efficient synchronization of a communication channel of a base station of a soft handover destination when a soft handover is activated in a CDMA mobile communication system. Is to establish.

【００３３】そのために、まず、ソフトハンドオーバー
先基地局を含む各基地局は、それぞれ異なって割り当て
られた独自の拡散コードで拡散されたパイロットチャネ
ルを生成し、該パイロットチャネルに自分の通信チャネ
ルの拡散コードの位相情報を含ませて常時送信してい
る。To this end, each base station, including the soft handover destination base station, first generates a pilot channel spread by a unique spreading code assigned differently, and the pilot channel of its own communication channel is generated. The phase information of the spreading code is included and is always transmitted.

【００３４】また、移動局は、上述したように、ソフト
ハンドオーバー先基地局から送信されているパイロット
チャネルに含まれている通信チャネルの拡散コードの位
相情報を受信し、この位相情報と移動局が現在通信中の
ソフトハンドオーバー元基地局との上り通信チャネルの
拡散コードの位相との関係を測定するとともに、前記位
相情報に対応するタイミングと前記上り通信チャネルの
タイミングとの時間関係を測定する。Further, as described above, the mobile station receives the phase information of the spreading code of the communication channel included in the pilot channel transmitted from the soft handover destination base station, and the phase information and the mobile station are received. Measures the relationship with the phase of the spreading code of the uplink communication channel with the soft handover source base station currently in communication, and also measures the time relationship between the timing corresponding to the phase information and the timing of the uplink communication channel. .

【００３５】更に、移動局は、これらの測定した位相関
係および時間関係を位相関係情報として記憶するととも
に、この記憶した位相関係情報をソフトハンドオーバー
元基地局に通知し、ソフトハンドオーバー元基地局にそ
の位相関係情報を記憶させるようにしている。Further, the mobile station stores the measured phase relationship and time relationship as phase relationship information, notifies the stored phase relationship information to the soft handover source base station, and the soft handover source base station. The phase relation information is stored in the.

【００３６】そして、前記位相関係情報の測定およびソ
フトハンドオーバー元基地局への通知は、ソフトハンド
オーバーの起動時にいちいち行うのでなく、ソフトハン
ドオーバーの起動より前に予め行い、その結果の位相関
係情報を上述したように移動局とソフトハンドオーバー
元基地局のメモリに予め記憶しておき、これによりソフ
トハンドオーバーの起動時に新たに位相関係情報の測定
を行うことなく、ソフトハンドオーバー先基地局の通信
チャネルの同期を迅速かつ効率的に確立しようとするも
のである。The measurement of the phase relation information and the notification to the soft handover source base station are not performed at each activation of the soft handover, but are performed in advance before the activation of the soft handover, and the phase relation of the result is obtained. The information is stored in advance in the memory of the mobile station and the soft handover source base station as described above, so that the soft handover destination base station does not have to newly measure the phase relation information when the soft handover is activated. The aim is to establish synchronization of the communication channels of the above in a quick and efficient manner.

【００３７】すなわち、ソフトハンドオーバーが起動さ
れると、ソフトハンドオーバー元基地局は、メモリに記
憶されていた位相関係情報を読み出し、有線回線送信回
路を介してソフトハンドオーバー先基地局に送信する。
ソフトハンドオーバー先基地局は、ソフトハンドオーバ
ー元基地局から受け取った位相関係情報に従って上り通
信チャネルの同期を確立することができる。That is, when the soft handover is started, the soft handover source base station reads out the phase relation information stored in the memory and transmits it to the soft handover destination base station via the wired line transmission circuit. .
The soft handover destination base station can establish synchronization of the uplink communication channel according to the phase relation information received from the soft handover source base station.

【００３８】まず、各基地局（本実施形態では、ソフト
ハンドオーバー先基地局として説明する）が送信してい
るパイロットチャネルに含まれている前記位相情報につ
いて説明する。First, the phase information included in the pilot channel transmitted by each base station (which will be described as a soft handover destination base station in this embodiment) will be described.

【００３９】ソフトハンドオーバー先基地局が常時送信
しているパイロットチャネルには、図３（ａ）に示すよ
うに、位相情報が設定されている。この位相情報は各フ
レームの基準点であるフレームの先頭、すなわち図３
（ａ）においては（イ）の時点における通信チャネルの
拡散コードの位相を示している。従って、この位相情報
の値がＰ１とすると、次のフレームの先頭では、拡散コ
ードは初期状態からＰ１だけ位相がシフトした状態にあ
ることを示している。Phase information is set in the pilot channel constantly transmitted by the soft handover destination base station, as shown in FIG. 3 (a). This phase information is the beginning of the frame which is the reference point of each frame, that is, FIG.
In (a), the phase of the spreading code of the communication channel at the time of (a) is shown. Therefore, if the value of this phase information is P1, it indicates that the spreading code is in a state in which the phase is shifted by P1 from the initial state at the beginning of the next frame.

【００４０】一方、移動局が現在通信中のソフトハンド
オーバー元基地局との上り通信チャネルのタイミングが
図３（ａ）に示すパイロットチャネルに対して図３
（ｂ）に示すような関係にあるとすると、この上り通信
チャネルの最も近いフレームの先頭タイミング（ロ）と
前記受信したパイロットチャネルの拡散コードの位相情
報に対応するタイミング（イ）との時間差は図示のよう
にＴｄとなる。On the other hand, the timing of the uplink communication channel with the soft handover source base station which the mobile station is currently communicating is as shown in FIG. 3 with respect to the pilot channel shown in FIG. 3 (a).
Given the relationship shown in (b), the time difference between the head timing (b) of the frame closest to the upstream communication channel and the timing (b) corresponding to the phase information of the received pilot channel spreading code is It becomes Td as shown in the figure.

【００４１】また、移動局が現在通信中の上り通信チャ
ネルの拡散コードの（ロ）点における位相情報は、移動
局でわかっており、この位相情報をＰ２とすると、ソフ
トハンドオーバー先基地局の通信チャネルの拡散コード
の位相Ｐ１とソフトハンドオーバー元基地局の上り通信
チャネルの拡散コードの位相Ｐ２との差が両基地局の拡
散コードの位相差Ｌｄ＝Ｐ１−Ｐ２として求まる。Also, the phase information at the point (b) of the spreading code of the uplink communication channel currently being communicated by the mobile station is known by the mobile station, and if this phase information is P2, the soft handover destination base station The difference between the phase P1 of the spreading code of the communication channel and the phase P2 of the spreading code of the upstream communication channel of the soft handover source base station is found as the phase difference Ld = P1-P2 of the spreading code of both base stations.

【００４２】すなわち、ソフトハンドオーバー先基地局
は、自分の通信チャネルの拡散コードの位相がソフトハ
ンドオーバー元基地局の上り通信チャネルの拡散コード
に対して上述したフレーム時間差Ｔｄだけ進んだタイミ
ングでＬｄ＝Ｐ１−Ｐ２だけ進んでいることがわかる。
従って、ソフトハンドオーバー先基地局は、この位相差
Ｌｄ＝Ｐ１−Ｐ２およびフレーム時間差Ｌｄを位相関係
情報として移動局からソフトハンドオーバー元基地局を
介して通知してもらうことにより、該位相関係情報に従
って上り通信チャネルの同期を迅速に確立することがで
きる。That is, the soft handover destination base station Ld at the timing when the phase of the spreading code of its own communication channel is advanced by the above-mentioned frame time difference Td with respect to the spreading code of the upstream communication channel of the soft handover source base station. It can be seen that = P1-P2 is advanced.
Therefore, the soft handover destination base station is notified of the phase difference Ld = P1-P2 and the frame time difference Ld as the phase relation information from the mobile station via the soft handover source base station. According to the above, synchronization of the uplink communication channel can be quickly established.

【００４３】以上のことを踏まえて、本発明の一実施形
態に係わる移動通信システムにおける拡散コードの同期
確立方法に使用される移動局装置および基地局装置の構
成について図１および図２を参照して説明する。Based on the above, the configurations of the mobile station apparatus and the base station apparatus used in the spreading code synchronization establishing method in the mobile communication system according to the embodiment of the present invention will be described with reference to FIGS. Explain.

【００４４】図１に示す移動局装置は、基地局からの無
線信号を受信するとともに、基地局への無線信号を送信
するアンテナ１を有し、該アンテナ１で受信した基地局
からの信号は送受分配回路３、受信回路５を介して復調
回路７に供給され、ここで拡散コードおよび拡散コード
位相で同期確立が行われるとともに、拡散コードを用い
た逆拡散および通常の復調が行われる。復調された信号
は復号化回路９に供給され、伝送信号と制御信号の復号
が行われ、制御信号は制御回路１１に供給され、伝送信
号はマンマシンインタフェースに供給される。The mobile station apparatus shown in FIG. 1 has an antenna 1 for receiving a radio signal from a base station and transmitting a radio signal to the base station, and the signal from the base station received by the antenna 1 is The signal is supplied to the demodulation circuit 7 via the transmission / reception distribution circuit 3 and the reception circuit 5, where synchronization is established with the spreading code and the spreading code phase, and despreading using the spreading code and normal demodulation are performed. The demodulated signal is supplied to the decoding circuit 9, the transmission signal and the control signal are decoded, the control signal is supplied to the control circuit 11, and the transmission signal is supplied to the man-machine interface.

【００４５】また、アンテナ１で受信され送受分配回路
３を通った基地局からの受信信号のうち制御回路１１で
指定された受信信号である基地局からのパイロットチャ
ネルは、位相関係情報測定回路１３に供給され、移動局
が現在通信中のソフトハンドオーバー元基地局との上り
通信チャネルとの前記位相関係情報が測定され、その測
定値は制御回路１１に供給される。制御回路１１は、こ
の測定値をメモリ２１に記憶するとともに、該位相関係
情報を基地局に通知するための制御信号を生成し、この
制御信号を符号化回路１５で符号化し、更に変調回路１
７で一次変調および拡散コードで拡散変調を行ってか
ら、送信回路１９、送受分配回路３を介してアンテナ１
から基地局に向けて送信する。また、符号化回路１５に
はマンマシンインタフェースからの音声信号などの伝送
信号も供給され、この伝送信号も同様の経路で同様の処
理を施され、アンテナ１から基地局に向けて送信され
る。Of the received signals from the base station received by the antenna 1 and passed through the transmission / reception distribution circuit 3, the pilot channel from the base station which is the received signal designated by the control circuit 11 is the phase relation information measuring circuit 13. Is supplied to the mobile station and the above-mentioned phase relation information with the uplink communication channel with the soft handover source base station with which the mobile station is currently communicating is measured, and the measured value is supplied to the control circuit 11. The control circuit 11 stores the measured value in the memory 21, generates a control signal for notifying the base station of the phase relation information, encodes the control signal by the encoding circuit 15, and further the modulation circuit 1
After performing the primary modulation and the spread modulation with the spreading code at 7, the antenna 1 is transmitted through the transmission circuit 19 and the transmission / reception distribution circuit 3.
To the base station. Further, a transmission signal such as a voice signal from the man-machine interface is also supplied to the encoding circuit 15, and this transmission signal is also subjected to the same processing on the same path and transmitted from the antenna 1 toward the base station.

【００４６】図２に示す基地局装置は、移動局からの無
線信号を受信するとともに、移動局への無線信号を送信
するアンテナ２３を有し、該アンテナ２３で受信した移
動局からの信号は送受分配回路２５、受信回路２７を介
して復調回路２９に供給され、ここで拡散コード位相で
同期確立が行われるとともに、拡散コードを用いた逆拡
散および通常の復調が行われる。復調された信号は復号
化回路３１に供給され、伝送信号と制御信号の復号が行
われ、制御信号は制御回路３３に供給され、伝送信号は
有線回線送信回路３７を介して合成局に送信される。制
御回路３３は制御信号のうち移動局からの位相関係情報
をメモリ３５に記憶する。The base station device shown in FIG. 2 has an antenna 23 for receiving a radio signal from a mobile station and transmitting a radio signal to the mobile station, and the signal from the mobile station received by the antenna 23 is The signal is supplied to the demodulation circuit 29 via the transmission / reception distribution circuit 25 and the reception circuit 27, where synchronization is established in the spreading code phase, and despreading using the spreading code and normal demodulation are performed. The demodulated signal is supplied to the decoding circuit 31, the transmission signal and the control signal are decoded, the control signal is supplied to the control circuit 33, and the transmission signal is transmitted to the synthesizing station via the wired line transmission circuit 37. It The control circuit 33 stores the phase relation information from the mobile station in the control signal in the memory 35.

【００４７】また、合成局からの伝送信号は有線回線受
信回路３９で受信され、伝送信号と制御信号とに分解さ
れ、伝送信号は制御回路３３からの制御信号とともに符
号化回路４１で符号化され、変調回路４３で一次変調お
よび拡散コードを用いた拡散変調を施されてから、送信
回路４５および送受分配回路２５を介してアンテナ２３
から移動局に送信される。Further, the transmission signal from the synthesizing station is received by the wired line receiving circuit 39, decomposed into the transmission signal and the control signal, and the transmission signal is encoded by the encoding circuit 41 together with the control signal from the control circuit 33. After the primary modulation and the spread modulation using the spread code are performed by the modulation circuit 43, the antenna 23 is transmitted via the transmission circuit 45 and the transmission / reception distribution circuit 25.
From the mobile station.

【００４８】更に、図２に示す基地局装置は、ソフトハ
ンドオーバーが起動されると、メモリ３５に記憶されて
いた該当する位相関係情報を読み出し、該位相関係情報
をソフトハンドオーバー先基地局へ有線回線送信回路３
７を介して通知する。Further, when the soft handover is activated, the base station apparatus shown in FIG. 2 reads out the relevant phase relation information stored in the memory 35 and sends the phase relation information to the soft handover destination base station. Wired line transmission circuit 3
Notify via 7.

【００４９】また、図２に示す基地局装置は、ソフトハ
ンドオーバー先基地局である場合には、ソフトハンドオ
ーバー元基地局から有線回線受信回路３９を介して受信
した位相関係情報を復調回路２９および変調回路４３に
供給し、該位相関係情報に従って下り通信チャネルの送
信および上り通信チャネルの同期確立を行う。When the base station apparatus shown in FIG. 2 is the soft handover destination base station, the demodulation circuit 29 receives the phase relation information received from the soft handover source base station via the wired line receiving circuit 39. And the modulation circuit 43 to transmit the downlink communication channel and establish synchronization of the uplink communication channel according to the phase relation information.

【００５０】次に、以上のように構成される移動局装置
および基地局装置の作用を説明する。Next, the operation of the mobile station apparatus and base station apparatus configured as described above will be described.

【００５１】移動局が基地局（ソフトハンドオーバー元
基地局）と通信している時、移動局はソフトハンドオー
バーに備えて前もって周辺セルの各基地局であるソフト
ハンドオーバー先基地局から送信されている図３（ａ）
に示すパイロットチャネルを受信し、この受信したパイ
ロットチャネルから前記位相関係情報を位相関係情報測
定回路１３で予め測定し、この測定した位相関係情報を
メモリ２１に記憶している。When the mobile station is communicating with the base station (soft handover source base station), the mobile station transmits in advance from the soft handover destination base station which is each base station of the neighboring cells in preparation for the soft handover. Figure 3 (a)
1 receives the pilot channel, the phase relationship information measuring circuit 13 measures the phase relationship information from the received pilot channel in advance, and the measured phase relationship information is stored in the memory 21.

【００５２】更に詳しくは、ソフトハンドオーバー先基
地局を含む各基地局は、それぞれ異なって割り当てられ
た独自の拡散コードで拡散されたパイロットチャネルを
生成し、該パイロットチャネルに自分の通信チャネルの
拡散コードの位相情報を図３（ａ）に示すように含ませ
て常時送信している。More specifically, each base station including the soft handover destination base station generates a pilot channel spread by a unique spreading code assigned differently, and spreads its communication channel on the pilot channel. As shown in FIG. 3A, the phase information of the code is included and is always transmitted.

【００５３】そして、移動局はソフトハンドオーバー元
基地局と通信している最中のソフトハンドオーバーが発
生しない前にソフトハンドオーバー先基地局を含む各基
地局から送信されている前記パイロットチャネルを順次
受信し、この受信したパイロットチャネルに含まれてい
る位相情報Ｐ１、すなわちソフトハンドオーバー先基地
局の通信チャネルの拡散コードのフレーム先頭位置での
位相情報Ｐ１を抽出し、この位相情報Ｐ１と移動局が現
在通信中のソフトハンドオーバー元基地局との上り通信
チャネルのフレーム先頭位置での拡散コードの位相情報
Ｐ２との位相差Ｌｄ＝Ｐ１−Ｐ２およびこれらの位相差
にそれぞれ対応するフレームの先頭タイミングでの前記
時間差Ｔｄを位相関係情報として位相関係情報測定回路
１３で周辺セルの各基地局に対して測定する。Then, the mobile station uses the pilot channel transmitted from each base station including the soft handover destination base station before soft handover occurs during communication with the soft handover source base station. The phase information P1 included in the received pilot channel, that is, the phase information P1 at the frame start position of the spread code of the communication channel of the soft handover destination base station is extracted and sequentially moved with this phase information P1. The phase difference Ld = P1-P2 with the phase information P2 of the spreading code at the frame start position of the uplink communication channel with the soft handover source base station with which the station is currently communicating, and the beginning of the frame respectively corresponding to these phase differences Using the time difference Td at the timing as the phase relation information, the phase relation information measuring circuit 13 Measured to the base station.

【００５４】移動局は、位相関係情報測定回路１３で測
定した位相関係情報を制御回路１１を介してメモリ２１
に各基地局に対応して記憶するとともに、この位相関係
情報を基地局に通知するための制御信号を生成し、この
制御信号を符号化回路１５で符号化し、変調回路１７で
変調し、送信回路１９および送受分配回路３を介してア
ンテナ１からソフトハンドオーバー元基地局に通知す
る。The mobile station stores the phase relation information measured by the phase relation information measuring circuit 13 via the control circuit 11 in the memory 21.
In addition to storing each of the base stations in correspondence with the base station, a control signal for notifying the base station of the phase relation information is generated, the control signal is encoded by the encoding circuit 15, modulated by the modulation circuit 17, and transmitted. The antenna 1 notifies the soft handover source base station via the circuit 19 and the transmission / reception distribution circuit 3.

【００５５】ソフトハンドオーバー元基地局は、前記制
御信号をアンテナ２３、送受分配回路２５、受信回路２
７を介して受信し、復調回路２９で復調し、復号化回路
３１で復号し、制御回路３３に供給する。制御回路３３
は、制御信号のうち前記位相関係情報を取り出し、メモ
リ３５に各基地局に対応して記憶する。The soft handover source base station transmits the control signal to the antenna 23, the transmission / reception distribution circuit 25, and the reception circuit 2.
The signal is received via 7, demodulated by the demodulation circuit 29, decoded by the decoding circuit 31 and supplied to the control circuit 33. Control circuit 33
Extracts the phase relation information from the control signal and stores it in the memory 35 corresponding to each base station.

【００５６】以上のようにして、移動局は、位相関係情
報を測定し、メモリ２１に記憶するとともに、ソフトハ
ンドオーバー元基地局に通知し、該ソフトハンドオーバ
ー元基地局のメモリ３５に記憶させるという動作をソフ
トハンドオーバーが発生する前の適当な時に予め行い、
何時ソフトハンドオーバーが発生しても迅速に対処し得
るようになっている。As described above, the mobile station measures the phase relation information and stores it in the memory 21, and at the same time, notifies the soft handover source base station to store it in the memory 35 of the soft handover source base station. Perform the operation in advance at an appropriate time before soft handover occurs,
Even if a soft handover occurs, it can be dealt with promptly.

【００５７】そして、このような状態において、移動局
でソフトハンドオーバーが起動されると、移動局はソフ
トハンドオーバー要求信号を生成し、該ソフトハンドオ
ーバー要求信号をソフトハンドオーバー元基地局に送信
する。Then, in such a state, when soft handover is activated in the mobile station, the mobile station generates a soft handover request signal and transmits the soft handover request signal to the soft handover source base station. To do.

【００５８】ソフトハンドオーバー元基地局は、移動局
からソフトハンドオーバー要求信号を受信すると、メモ
リ３５に予め記憶されている位相関係情報のうちソフト
ハンドオーバー先基地局に該当する位相関係情報を読み
出し、この位相関係情報を制御回路３３の制御により有
線回線送信回路３７を介してソフトハンドオーバー先基
地局に送信する。なお、このように処理することによ
り、本実施形態では、図４で示した従来の処理における
ソフトハンドオーバー元基地局と移動局との間の最初の
３つの処理である「位相関係情報測定要求」「位相関係
情報測定」「位相関係情報測定応答」の処理が不要とな
っているものである。Upon receiving the soft handover request signal from the mobile station, the soft handover source base station reads out the phase relation information corresponding to the soft handover destination base station from the phase relation information stored in advance in the memory 35. The phase relation information is transmitted to the soft handover destination base station via the wired line transmission circuit 37 under the control of the control circuit 33. Note that, by performing the processing as described above, in the present embodiment, the first three processes between the soft handover source base station and the mobile station in the conventional process shown in FIG. The processing of "measurement of phase-related information" and "response of measurement of phase-related information" is unnecessary.

【００５９】ソフトハンドオーバー先基地局は、位相関
係情報を有線回線受信回路３９で受信すると、該位相関
係情報を制御回路３３に供給する。制御回路３３は、該
位相関係情報を復調回路２９および変調回路４３に供給
する。変調回路４３は該位相関係情報に従って移動局に
対する下り通信チャネルの送信を開始し、また復調回路
２９は該位相関係情報に従って移動局との上り通信チャ
ネルの同期を確立する。When the soft handover destination base station receives the phase relation information by the wired line receiving circuit 39, it supplies the phase relation information to the control circuit 33. The control circuit 33 supplies the phase relation information to the demodulation circuit 29 and the modulation circuit 43. The modulation circuit 43 starts transmission of the downlink communication channel to the mobile station according to the phase relation information, and the demodulation circuit 29 establishes synchronization of the uplink communication channel with the mobile station according to the phase relation information.

【００６０】上述した処理において、移動局における位
相関係情報の測定およびソフトハンドオーバー元基地局
への通知は、ソフトハンドオーバー起動前に行っておけ
ば、ソフトハンドオーバーの起動時に迅速に対処し得る
ものであるが、この測定および通知の時期としては、例
えば移動局が発着信接続を行った直後に行えば、ソフト
ハンドオーバーはこの発着信接続の後に発生するもので
あるため十分である。In the above-mentioned processing, if the measurement of the phase relation information in the mobile station and the notification to the soft handover source base station are performed before the soft handover is activated, the soft handover can be dealt with promptly. However, the timing of this measurement and notification is sufficient, for example, immediately after the mobile station has performed the outgoing / incoming connection, since the soft handover occurs after this outgoing / incoming connection.

【００６１】また、ソフトハンドオーバー元基地局と通
信中の移動局は、在圏セルの判定のために、常に周辺セ
ルのパイロットチャネルの受信レベルを測定し、その測
定した各受信レベルを周辺セルの各パイロットチャネル
の拡散コードＣ１〜Ｃｎに対応して図５に示すようにパ
イロットチャネル受信レベルテーブルとして記憶してい
るものであるため、移動局は、この受信レベルテーブル
のうちのソフトハンドオーバーが許容される所定の上位
の受信レベルのパイロットチャネルについてのみ前記位
相関係情報の測定および通知を行うように構成すること
ができる。このように構成することにより、測定処理負
荷および通知による制御トラヒックを低減することがで
きる。Further, the mobile station communicating with the soft handover source base station always measures the reception levels of the pilot channels of the neighboring cells and judges the measured reception levels of the neighboring cells to determine the serving cell. 5 is stored as a pilot channel reception level table as shown in FIG. 5 corresponding to the spreading codes C1 to Cn of the respective pilot channels, the mobile station selects the soft handover from the reception level table. The measurement and notification of the phase relation information can be performed only for the pilot channel of a predetermined upper reception level that is allowed. With this configuration, it is possible to reduce the measurement processing load and the control traffic due to the notification.

【００６２】上記の場合において、移動局は、受信レベ
ルテーブルのうちのソフトハンドオーバーが許容される
所定の上位の受信レベルのパイロットチャネルの代わり
に、ソフトハンドオーバーが許容される所定の受信レベ
ル以上のパイロットチャネルについて前記位相関係情報
の測定および通知を行うようにしてもよい。In the above case, the mobile station has a reception level equal to or higher than a predetermined reception level that allows soft handover, instead of a pilot channel having a predetermined higher reception level that allows soft handover in the reception level table. The above-mentioned phase-related information may be measured and notified for the pilot channel.

【００６３】また、別の方法としては、移動局は、前記
受信レベルテーブル内のソフトハンドオーバーが許容さ
れる上位のパイロットチャネルに、前記位相関係情報の
測定が未測定のパイロットチャネルが加わった時点、も
しくは前記位相関係情報の測定を前回実行してから所定
時間以上経過しているパイロットチャネルが加わった時
点で該未測定のパイロットチャネルについて前記位相関
係情報の測定および通知を行うように構成してもよい。
このように構成することにより、同様に測定処理負荷お
よび通知による制御トラヒックを低減することができ
る。As another method, the mobile station may add a pilot channel for which the measurement of the phase relation information has not been measured to a higher pilot channel in the reception level table where soft handover is permitted. Alternatively, it is configured to perform measurement and notification of the phase-related information for the unmeasured pilot channel when a pilot channel that has passed a predetermined time or more since the previous measurement of the phase-related information is added. Good.
With this configuration, it is possible to similarly reduce the control processing traffic due to the measurement processing load and the notification.

【００６４】更に別の方法としては、移動局は、前記受
信レベルテーブル内のソフトハンドオーバーが許容され
る上位のパイロットチャネルについて、前回測定したと
きの受信レベルが所定の値以上変化したパイロットチャ
ネルについて前記位相関係情報の測定および通知を行う
ように構成してもよい。As still another method, the mobile station may check the upper pilot channel in the reception level table for which soft handover is permitted, for the pilot channel whose reception level at the last measurement has changed by a predetermined value or more. It may be configured to measure and notify the phase relationship information.

【００６５】以上のようにパイロットチャネルの受信レ
ベルを位相関係情報の測定および通知タイミングとして
いるのは、受信レベルの変動により移動局の移動距離を
推定するためである。すなわち、受信レベルが変動した
ということは、移動局が移動したと考えられるが、移動
局が移動すると、位相タイミングが変わっていると考え
られるからである。As described above, the reception level of the pilot channel is used as the timing for measuring and notifying the phase relation information in order to estimate the moving distance of the mobile station from the fluctuation of the reception level. That is, the fact that the reception level fluctuates means that the mobile station has moved, but that the phase timing has changed when the mobile station has moved.

【００６６】また、他の方法としては、移動局は、タイ
マを用いて、パイロットチャネル受信レベルテーブル内
のソフトハンドオーバーが許容される以上のパイロット
チャネルについて定期的に、すなわち所定の時間毎に前
記位相関係情報の測定および通知を行うように構成する
ことも可能である。この場合にも、測定処理負荷および
通知による制御トラヒックを同様に低減できる。また、
タイマの値を可変することにより、追従精度と制御トラ
ヒックを調整することができる。As another method, the mobile station uses a timer to periodically perform the above-mentioned pilot channels in the pilot channel reception level table for which soft handover is permitted, that is, every predetermined time. It is also possible to configure to measure and notify the phase relation information. Also in this case, the measurement processing load and the control traffic due to the notification can be similarly reduced. Also,
By varying the value of the timer, the tracking accuracy and control traffic can be adjusted.

【００６７】更に他の方法としては、移動局は、前記位
相関係情報の測定を随時行い、以前に基地局に通知した
測定値と最新の測定値との差が所定の値以上となった場
合に、この最新の測定値を基地局に通知するように構成
してもよい。このように構成することにより、通知によ
る制御トラヒックを低減できる。また、測定を随時行っ
ているので、追従精度を高く維持することができる。As still another method, the mobile station measures the phase relation information at any time, and when the difference between the measured value previously notified to the base station and the latest measured value is equal to or more than a predetermined value. In addition, the latest measurement value may be notified to the base station. With this configuration, control traffic due to notification can be reduced. Moreover, since the measurement is performed at any time, it is possible to maintain high tracking accuracy.

【００６８】[0068]

【発明の効果】以上説明したように、本発明によれば、
移動局はソフトハンドオーバー起動より前にソフトハン
ドオーバー先基地局との無線回線の拡散コードと通信中
のソフトハンドオーバー元基地局との無線回線の拡散コ
ードの位相関係を測定して記憶するとともに、ソフトハ
ンドオーバー元基地局に通知して記憶させておき、ソフ
トハンドオーバー起動時、ソフトハンドオーバー元基地
局はソフトハンドオーバー先基地局に対して位相関係情
報を通知し、ソフトハンドオーバー先基地局は該位相関
係情報に基づいて上り無線回線の同期を確立するので、
従来のようにソフトハンドオーバーの起動毎に位相関係
情報の測定および通知を行う必要がなく、ソフトハンド
オーバー制御を迅速かつ適切なタイミングで行うことが
できるとともに、測定処理負荷の低減および通知による
制御トラヒックの低減を図ることができる。As described above, according to the present invention,
The mobile station measures and stores the phase relationship between the spreading code of the wireless link with the soft handover destination base station and the spreading code of the wireless link with the soft handover source base station during communication before the soft handover is activated. , The soft handover source base station is notified and stored, and when the soft handover is started, the soft handover source base station notifies the soft handover destination base station of the phase relation information, and the soft handover destination base station is notified. Since the station establishes synchronization of the uplink radio line based on the phase relation information,
Unlike the conventional method, it is not necessary to measure and notify the phase-related information each time the soft handover is started, and soft handover control can be performed quickly and at appropriate timing, and the measurement processing load is reduced and the notification is controlled. It is possible to reduce traffic.

【００６９】また、本発明によれば、ソフトハンドオー
バー元基地局と通信中の移動局はソフトハンドオーバー
の起動より前に、周辺セルの各基地局から送信されてい
るパイロットチャネルに含まれている通信チャネルの拡
散コードの位相情報を順次受信し、この位相情報と通信
中のソフトハンドオーバー元基地局との上り通信チャネ
ルの拡散コードの位相との関係から両者の位相関係およ
び時間関係を位相関係情報として記憶するとともにソフ
トハンドオーバー元基地局に通知して記憶させておき、
ソフトハンドオーバー起動時、ソフトハンドオーバー元
基地局はソフトハンドオーバー先基地局に対して位相関
係情報を通知し、ソフトハンドオーバー先基地局は位相
関係情報に基づいて上り無線回線の同期を確立するの
で、従来のようにソフトハンドオーバーの起動毎に位相
関係情報の測定および通知を行う必要がなく、ソフトハ
ンドオーバー制御を迅速かつ適切なタイミングで行うこ
とができるとともに、測定処理負荷の低減および通知に
よる制御トラヒックの低減を図ることができる。Further, according to the present invention, the mobile station communicating with the soft handover source base station is included in the pilot channel transmitted from each base station of the neighboring cells before the soft handover is activated. The phase information of the spreading code of the existing communication channel is sequentially received, and the phase relationship and the time relationship between the two are calculated from the relationship between this phase information and the phase of the spreading code of the uplink communication channel with the soft handover source base station in communication. In addition to storing as related information, the soft handover source base station is notified and stored.
When the soft handover starts, the soft handover source base station notifies the soft handover destination base station of the phase relation information, and the soft handover destination base station establishes the synchronization of the uplink radio line based on the phase relation information. Therefore, unlike the conventional case, it is not necessary to measure and notify the phase relation information every time the soft handover is started, and the soft handover control can be performed quickly and at appropriate timing, and the measurement processing load can be reduced and notified. Therefore, it is possible to reduce the control traffic.

【００７０】更に、本発明によれば、移動局は位相関係
情報の測定および通知を発着信接続直後に行うので、位
相関係情報の測定処理負荷および通知による制御トラヒ
ックを低減することができる。Furthermore, according to the present invention, since the mobile station measures and notifies the phase relation information immediately after the outgoing / incoming connection, it is possible to reduce the measurement processing load of the phase relation information and the control traffic due to the notice.

【００７１】本発明によれば、周辺セルのパイロットチ
ャネルの受信レベルのうち所定の上位の受信レベルの基
地局のパイロットチャネルについてのみ位相関係情報の
測定および通知を行うので、測定処理負荷および通知に
よる制御トラヒックを低減することができる。According to the present invention, the phase relation information is measured and notified only for the pilot channel of the base station having a predetermined higher reception level among the reception levels of the pilot channels of the peripheral cells. Control traffic can be reduced.

【００７２】また、本発明によれば、周辺セルのパイロ
ットチャネルの受信レベルのうち所定の受信レベル以上
の基地局のパイロットチャネルについてのみ位相関係情
報の測定および通知を行うので、測定処理負荷および通
知による制御トラヒックを低減することができる。Further, according to the present invention, the phase-related information is measured and notified only for the pilot channel of the base station having a predetermined reception level or higher among the reception levels of the pilot channels of the peripheral cells, so the measurement processing load and notification It is possible to reduce the control traffic due to.

【００７３】更に、本発明によれば、周辺セルのパイロ
ットチャネルの受信レベルのうち所定の上位の受信レベ
ルのまたは所定の受信レベル以上の基地局のパイロット
チャネルに、前記位相関係情報の測定が未測定のパイロ
ットチャネルが加わった時点、もしくは前記位相関係情
報の測定を前回実行してから所定時間以上経過している
パイロットチャネルが加わった時点で該未測定のパイロ
ットチャネルについて位相関係情報の測定および通知を
行うので、測定処理負荷および通知による制御トラヒッ
クを低減することができる。Further, according to the present invention, the phase relation information is not measured on the pilot channel of the base station having a predetermined higher reception level or higher than the predetermined reception level among the reception levels of the pilot channels of the peripheral cells. Measurement and notification of phase-related information about the unmeasured pilot channel when a measurement pilot channel is added or when a pilot channel that has passed a predetermined time or more since the previous measurement of the phase-related information was added Therefore, the control processing traffic due to the measurement processing load and the notification can be reduced.

【００７４】本発明によれば、周辺セルのパイロットチ
ャネルの受信レベルのうち所定の上位の受信レベルのま
たは所定の受信レベル以上の基地局のパイロットチャネ
ルにおいて前回測定した受信レベルが所定の値以上変化
したパイロットチャネルについて位相関係情報の測定お
よび通知を行うので、測定処理負荷および通知による制
御トラヒックを低減することができる。According to the present invention, the reception level measured last time in the pilot channel of the base station having a predetermined higher reception level or higher than the predetermined reception level among the reception levels of the pilot channels of the peripheral cells changes by a predetermined value or more. Since the phase-related information is measured and notified for the pilot channel, the control processing traffic due to measurement processing load and notification can be reduced.

【００７５】また、本発明によれば、周辺セルのパイロ
ットチャネルの受信レベルのうち所定の上位の受信レベ
ルのまたは所定の受信レベル以上の基地局のパイロット
チャネルについて所定の時間毎に位相関係情報の測定お
よび通知を行うので、測定処理負荷および通知による制
御トラヒックを低減することができるとともに、所定の
時間を可変することにより追従精度および制御トラヒッ
クを調整することができる。Further, according to the present invention, the phase relation information of the pilot channel of the base station having a predetermined higher reception level or higher than the predetermined reception level among the reception levels of the pilot channels of the peripheral cells is obtained at predetermined time intervals. Since the measurement and the notification are performed, the control traffic due to the measurement processing load and the notification can be reduced, and the tracking accuracy and the control traffic can be adjusted by changing the predetermined time.

【００７６】更に、本発明によれば、移動局は前記測定
を随時行い、以前基地局に通知した位相関係情報と最新
に測定した位相関係情報との差が所定値以上となった時
に該最新の位相関係情報をソフトハンドオーバー元基地
局に通知するので、通知による制御トラヒックを低減す
ることができるとともに、測定を随時行うため追従精度
を向上することができる。Further, according to the present invention, the mobile station performs the measurement at any time, and when the difference between the phase relation information previously notified to the base station and the latest measured phase relation information becomes a predetermined value or more, the latest measurement is performed. Since the phase relation information of is notified to the soft handover source base station, the control traffic due to the notification can be reduced and the tracking accuracy can be improved because the measurement is performed at any time.

[Brief description of drawings]

【図１】本発明の一実施形態に係わる移動通信システム
における拡散コードの同期確立方法を実施する移動局装
置の構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a mobile station apparatus that implements a spread code synchronization establishing method in a mobile communication system according to an embodiment of the present invention.

【図２】図１の移動局装置とともに使用される基地局装
置の構成を示すブロック図である。FIG. 2 is a block diagram showing a configuration of a base station device used with the mobile station device of FIG.

【図３】図１，２の実施形態に使用されるソフトハンド
オーバー先基地局からのパイロットチャネルおよび移動
局が現在通信中のソフトハンドオーバー元基地局との上
り通信チャネルのフレーム構成を示す図である。FIG. 3 is a diagram showing a frame structure of a pilot channel from a soft handover destination base station used in the embodiments of FIGS. 1 and 2 and an uplink communication channel with a soft handover source base station with which a mobile station is currently communicating. Is.

【図４】従来のソフトハンドオーバー制御シーケンスを
示す図である。FIG. 4 is a diagram showing a conventional soft handover control sequence.

【図５】周辺セルのパイロットチャネルの受信レベルの
テーブルを示す図である。FIG. 5 is a diagram showing a table of reception levels of pilot channels of neighboring cells.

[Explanation of symbols]

７移動局の復調回路９移動局の復号化回路１１移動局の制御回路１３移動局の位相関係情報測定回路１５移動局の符号化回路１７移動局の変調回路２１移動局のメモリ２９基地局の復調回路３１基地局の復号化回路３３基地局の制御回路３５基地局のメモリ３７基地局の有線回線送信回路３９基地局の有線回線受信回路４１基地局の符号化回路４３基地局の変調回路 7 Mobile Station Demodulation Circuit 9 Mobile Station Decoding Circuit 11 Mobile Station Control Circuit 13 Mobile Station Phase Relationship Information Measurement Circuit 15 Mobile Station Encoding Circuit 17 Mobile Station Modulation Circuit 21 Mobile Station Memory 29 Base Station Demodulation circuit 31 Decoding circuit of base station 33 Control circuit of base station 35 Memory of base station 37 Wired line transmission circuit of base station 39 Wired line reception circuit of base station 41 Encoding circuit of base station 43 Modulation circuit of base station

Claims

[Claims]

1. A method of establishing spread code synchronization of a soft handover destination wireless link in a soft handover in a code division multiple access mobile communication system, wherein the mobile station executes a soft handover before the soft handover is activated. The phase relationship between the spreading code of the wireless channel with the handover destination base station and the spreading code of the wireless channel with the soft handover source base station in communication is measured, and the mobile station stores the measured phase relationship information, and The soft handover source base station is notified and stored, and when the soft handover is activated, the soft handover source base station notifies the soft handover destination base station of the stored phase relationship information, and the soft handover Based on the notified phase relation information, the destination base station receives the uplink radio line from the mobile station. Synchronization establishing method of spreading codes in a mobile communication system and establishes synchronization.

2. A method for establishing synchronization of spreading codes of a soft handover destination wireless line during soft handover in a code division multiple access mobile communication system, wherein each base station is allocated differently. A mobile station that is in communication with a soft handover source base station generates a pilot channel spread with its own spreading code, always transmits the pilot channel by including the phase information of the spreading code of its own communication channel, Prior to the activation of the soft handover, the phase information of the spreading code of the communication channel included in the pilot channel transmitted from each base station of the peripheral cells is sequentially received,
While measuring the relationship between this phase information and the phase of the spreading code of the uplink communication channel with the soft handover source base station that the mobile station is communicating with, the timing corresponding to the phase information and the timing of the uplink communication channel The time relationship is measured, and the measured phase relationship and time relationship are stored as phase relationship information, and the soft handover source base station is notified and stored. The station notifies the soft handover destination base station of the stored phase relation information, and the soft handover destination base station establishes synchronization of the uplink radio line from the mobile station based on the notified phase relation information. A method for establishing synchronization of a spreading code in a mobile communication system, characterized by:

3. The method for establishing synchronization of a spreading code in a mobile communication system according to claim 1, wherein the mobile station measures and notifies the phase relation information immediately after the outgoing / incoming connection.

4. The mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and among the measured reception levels, a mobile station of a predetermined higher reception level at which soft handover is permitted is selected. The method for establishing synchronization of a spreading code in a mobile communication system according to claim 2, wherein the phase relation information is measured and notified only for a pilot channel.

5. The mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and among the measured reception levels, a pilot of a base station having a predetermined reception level or higher at which soft handover is permitted. The method for establishing synchronization of a spreading code in a mobile communication system according to claim 2, wherein the phase relation information is measured and notified only for a channel.

6. The mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and the mobile station measures a reception level of a predetermined higher reception level or a predetermined reception level that allows soft handover among the measured reception levels. When a pilot channel for which the measurement of the phase relation information has not been added to the pilot channel of the base station with a reception level or higher, or a pilot channel which has passed a predetermined time or more since the measurement of the phase relation information was executed last time 3. The measurement and notification of the phase relationship information is performed on the unmeasured pilot channel at the time of addition of P.
A method for establishing synchronization of spreading codes in the mobile communication system according to claim 1.

7. The mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and among the measured reception levels, a predetermined higher reception level or a predetermined reception level at which soft handover is permitted. The spreading in the mobile communication system according to claim 2, wherein the phase relation information is measured and notified for a pilot channel whose reception level measured last time in a pilot channel of a base station having a reception level or higher has changed by a predetermined value or more. How to establish code synchronization.

8. The mobile station measures a reception level of a pilot channel from each base station of a peripheral cell, and the mobile station measures a reception level of a predetermined higher reception level or a predetermined reception level in which soft handover is allowed among the measured reception levels. 3. The spread code synchronization establishing method in a mobile communication system according to claim 2, wherein the phase relation information is measured and notified at predetermined time intervals for a pilot channel of a base station having a reception level or higher.

9. The mobile station performs the measurement at any time, and when the difference between the phase relation information notified to the base station and the latest measured phase relation information becomes equal to or more than a predetermined value, the latest phase relation information is obtained. The method for establishing synchronization of a spreading code in a mobile communication system according to claim 2, wherein the soft handover source base station is notified.

10. In a code division multiple access mobile communication system for establishing synchronization of spreading codes of a soft handover destination radio line at the time of soft handover, the mobile station device performs soft handover before soft handover is activated. Measuring means for measuring the phase relationship between the spreading code of the wireless channel with the destination base station and the spreading code of the wireless channel with the soft handover source base station during communication, and a memory for storing the phase relationship information measured by the measuring circuit Means and a notifying means for notifying the soft handover source base station of the phase relation information stored in the storage means, wherein the soft handover source base station device is configured to provide the phase notified by the notifying means of the mobile station. The storage means for storing the related information and the phase relation information stored in the storage means when the soft handover is activated And a notification means for notifying the handover destination base station, wherein the soft handover destination base station device is configured to transmit from the mobile station based on the phase relation information notified from the notification means of the soft handover source base station. 2. A mobile station apparatus and a base station apparatus in a mobile communication system, comprising: synchronization establishing means for establishing synchronization of an upstream radio line of the above.

11. In a mobile communication system of a code division multiple access system, which establishes synchronization of spreading codes of a soft handover destination radio line at the time of soft handover, each base station device has its own spreading assigned differently. The mobile station device generates a pilot channel spread by a code, and includes the phase information of the spreading code of its own communication channel in the pilot channel to always transmit the mobile station device. Receiving means for sequentially receiving phase information of spreading codes of a communication channel included in a pilot channel transmitted from each base station of neighboring cells, and the mobile station is communicating with the phase information received by the receiving means. Of the relationship between the soft handover source base station and the phase of the spreading code of the uplink communication channel, and The phase relationship information measuring means for measuring the time relationship between the timing corresponding to the phase information and the timing of the upstream communication channel, and the phase relationship and time relationship measured by the phase relationship information measuring means are stored as phase relationship information. The soft handover source base station device includes a storage unit and a notification unit that notifies the soft handover source base station of the phase relationship information stored in the storage unit, and the soft handover source base station device is configured to provide the phase relationship notified from the notification unit. The soft handover destination base station has a storage means for storing information and a notification means for notifying the soft handover destination base station at the time of soft handover activation of the phase relation information stored in the storage means. Based on the phase relation information notified from the notifying means of the over-originating base station, the uplink radio line synchronization from the mobile station is confirmed. A mobile station apparatus and a base station apparatus in a mobile communication system having synchronization establishing means for establishing a period.

12. The mobile station apparatus has a control means for controlling the measurement and notification of the phase relation information to be performed immediately after the outgoing / incoming call connection.
A mobile station device in the mobile communication system according to claim 1.

13. The mobile station apparatus comprises: reception level measuring means for measuring a reception level of a pilot channel from each base station of a peripheral cell; reception level storing means for storing the measured reception level; Control means for controlling so as to measure and notify the phase relation information only for a pilot channel of a base station of a predetermined higher reception level that allows soft handover among the reception levels. Item 11. A mobile station device in the mobile communication system according to item 11.

14. The mobile station apparatus comprises: reception level measuring means for measuring a reception level of a pilot channel from each base station of a peripheral cell; reception level storage means for storing the measured reception level; A control means for controlling so as to measure and notify the phase-related information only for pilot channels of a base station having a reception level higher than a predetermined reception level that allows soft handover. 11. A mobile station device in the mobile communication system according to item 11.

15. The mobile station apparatus comprises: reception level measuring means for measuring a reception level of a pilot channel from each base station of a peripheral cell; reception level storing means for storing the measured reception level; At the time when a pilot channel whose measurement of the phase relationship information has not been added is added to a pilot channel of a base station having a predetermined higher reception level or a predetermined reception level or more, which is allowed for soft handover among the reception levels, or Control means for controlling the measurement and notification of the phase-related information for the unmeasured pilot channel at the time when a pilot channel that has passed a predetermined time or more since the previous measurement of the phase-related information is added The mobile station apparatus in the mobile communication system according to claim 11, further comprising:

16. The mobile station apparatus comprises: reception level measuring means for measuring a reception level of a pilot channel from each base station of a peripheral cell; storage means for storing the measured reception level; and the stored reception level. Among the pilot channels of the base station having a predetermined higher reception level or a predetermined reception level or more for which soft handover is allowed, the measurement of the phase relation information for the pilot channel whose reception level measured last time has changed by a predetermined value or more The mobile station device in the mobile communication system according to claim 11, further comprising: a control unit that controls to perform the notification.

17. The mobile station apparatus comprises: reception level measuring means for measuring a reception level of a pilot channel from each base station of a peripheral cell; reception level storing means for storing the measured reception level; Control is performed so that the phase relation information is measured and notified at predetermined time intervals for a pilot channel of a base station having a predetermined higher reception level or a reception level higher than a predetermined reception level of the reception levels. The mobile station apparatus in the mobile communication system according to claim 11, further comprising a control unit.

18. The mobile station apparatus comprises a measurement control means for controlling the measurement of the phase relation information at any time, and a difference between the phase relation information notified to the base station and the latest measured phase relation information is predetermined. 12. The mobile communication system according to claim 11, further comprising notification control means for controlling the notification means so as to notify the soft handover source base station of the latest phase relation information when the value becomes equal to or more than a value. Mobile station equipment.