JPH0787419B2 - Control channel access method - Google Patents

Control channel access method

Info

Publication number
JPH0787419B2
JPH0787419B2 JP2202419A JP20241990A JPH0787419B2 JP H0787419 B2 JPH0787419 B2 JP H0787419B2 JP 2202419 A JP2202419 A JP 2202419A JP 20241990 A JP20241990 A JP 20241990A JP H0787419 B2 JPH0787419 B2 JP H0787419B2
Authority
JP
Japan
Prior art keywords
mobile station
signal
control channel
channel
random access
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2202419A
Other languages
Japanese (ja)
Other versions
JPH0490221A (en
Inventor
晴雄 近藤
泰樹 西
日登志 駒形
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2202419A priority Critical patent/JPH0787419B2/en
Publication of JPH0490221A publication Critical patent/JPH0490221A/en
Publication of JPH0787419B2 publication Critical patent/JPH0787419B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は移動体衛星通信方式における制御チャネルの構
成法とアクセス方法に関するものである。The present invention relates to a control channel configuration method and an access method in a mobile satellite communication system.

〔従来の技術〕[Conventional technology]

従来の制御チャネルの構成およびアクセス方法として
は、移動局発信および位置登録等のための「ランダムア
クセス用制御チャネル」および基地局からの要求に移動
局が応答する移動局「着信用制御チャネル」を個別に複
数チャネル持つ方式と、移動局発信および位置登録等の
ランダムアクセスと移動局着信を同一チャネルで制御す
る方式とがあった。As a conventional control channel configuration and access method, there are a "random access control channel" for origination and location registration of a mobile station, and a mobile station "incoming control channel" in which the mobile station responds to a request from a base station. There are a method of individually having a plurality of channels, and a method of controlling random access such as mobile station origination and location registration and mobile station termination on the same channel.

前者の、移動局発信および位置登録等のための「ランダ
ムアクセス用制御チャネル」および基地局からの要求に
移動局が応答する移動局「着信用制御チャネル」を個別
に複数チャネル持つ方式をマルチビーム移動体衛星通信
方式に採用した場合、トラヒックが少ないビームでもラ
ンダムアクセス用に１チャネル、着信用に１チャネル、
合計２チャネル配置する必要がある。The former is a multi-beam system that has multiple channels individually for the "random access control channel" for mobile station origination and location registration, and for the mobile station "incoming control channel" that responds to requests from the base station. When used in a mobile satellite communication system, 1 channel for random access, 1 channel for incoming calls, even for beams with low traffic
It is necessary to arrange a total of two channels.

移動体衛星通信方式では、衛星中継器電力の有効利用が
システム構成の必須条件であり、この点からこの方式は
マルチビーム移動体衛星通信方式の制御チャネル構成方
法およびアクセス方法としては不利であった。In the mobile satellite communication system, effective use of satellite repeater power is an essential condition for system configuration. From this point, this system is disadvantageous as a control channel configuration method and access method for the multi-beam mobile satellite communication system. .

これに対し、後者の、移動局発信および位置登録等のラ
ンダムアクセスと移動局着信を同一チャネルで制御する
方式では、１ビーム内のトラヒックに応じて必要なチャ
ネル数をビーム単位に配置できるので、周波数の有効利
用および衛星中継電力の有効利用の観点からは有利であ
った。On the other hand, in the latter method of controlling random access such as mobile station origination and location registration and mobile station termination on the same channel, the required number of channels can be arranged in beam units according to the traffic in one beam. It was advantageous from the viewpoint of effective use of frequency and satellite relay power.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

上述したように、移動局発信および位置登録等のランダ
ムアクセスと移動局着信を同一チャネルで制御する方式
は周波数と衛星中継電力の有効利用と言う点での有利性
を持っているものの、以下に述べるような問題点があっ
た。As described above, the method of controlling the random access such as mobile station origination and location registration and the mobile station termination on the same channel has an advantage in that the frequency and the satellite relay power are effectively used. There were some problems to mention.

すなわち、ランダムアクセス信号と基地局からの指示に
よる移動局応答信号との衝突を避けるため、応答信号の
送信期間をランダムアクセス禁止にする必要があり、ラ
ンダムアクセス信号が一定長でない場合に応答信号とラ
ンダムアクセス信号の衝突を防止するには、移動局がラ
ンダムアクセス信号を送信中に別の移動局向け応答信号
の送信指示を受信したら、ランダムアクセス信号の送信
を一旦中断し、該応答信号の送信が終了した後で送信を
再開する方法を採るか、あるいは、他の方法として、移
動局が短い長さの予約信号を送信し、信号長が一定長で
ない信号を移動局から送信する時の送信タイミングを基
地局に設定させる方法を採ることが必要となる。That is, in order to avoid collision between the random access signal and the mobile station response signal instructed by the base station, it is necessary to prohibit the random access transmission period of the response signal. To prevent collision of random access signals, when a mobile station receives an instruction to send a response signal for another mobile station while transmitting the random access signal, it suspends the transmission of the random access signal and then sends the response signal. Transmission is resumed after the termination, or as another method, when the mobile station transmits a reservation signal of short length and the signal length of the signal is not constant from the mobile station. It is necessary to adopt a method of setting the timing in the base station.

また、本方式では、移動局からの応答信号が連続する等
によりランダムアクセス禁止期間が長時間存在すると、
応答信号終了直後にランダムアクセス信号が同時に送信
されて衝突率が増大する欠点があった。In addition, in this method, if the random access prohibition period exists for a long time due to continuous response signals from the mobile station,
There is a drawback in that the random access signal is simultaneously transmitted immediately after the end of the response signal and the collision rate increases.

なお、アクセス方式としてポーリング方式を用いた場合
には、基地局が移動局に送信要求の有無を順番に調べて
いく必要があるため、多数の移動局を収容する移動体通
信では移動局の要求信号が基地局に届くまでに膨大な時
間を必要とし、実用的でない。When the polling method is used as the access method, the base station needs to sequentially check the presence or absence of a transmission request to the mobile station. Therefore, in mobile communication that accommodates a large number of mobile stations, the request from the mobile station is required. It takes a huge amount of time for the signal to reach the base station, which is not practical.

本発明は、上述のような従来の問題点を解決するため成
されたもので、マルチビーム移動体衛星通信方式の制御
チャネル構成として、衛星電力と周波数を有効利用でき
る制御チャネルアクセス方法を提供することを目的とし
ている。The present invention has been made to solve the above-mentioned conventional problems, and provides a control channel access method capable of effectively utilizing satellite power and frequency as a control channel configuration of a multi-beam mobile satellite communication system. Is intended.

〔課題を解決するための手段〕[Means for Solving the Problems]

本発明によれば上述の目的は前記特許請求の範囲に記載
された手段により達成される。According to the invention, the above mentioned objects are achieved by means of the patent claims.

すなわち、本発明は、マルチビーム移動体衛星通信方式
の制御チャネルとして、衛星から移動局方向はビーム毎
に個別の制御チャネルを配置し、移動局から衛星方向は
各ビーム共通に複数制御チャネルを配置する方式におい
て、移動局から衛星方向の複数制御チャネルをランダム
アクセス用制御チャネルと基地局の制御に応答する応答
信号専用制御チャネルに区別し、移動局の要求で制御信
号を送信する場合はランダムアクセス制御チャネルを使
用し、基地局からの指示で制御信号を送信する場合は該
当する応答信号専用制御チャネルを使用する制御チャネ
ルアクセス方法である。That is, according to the present invention, as a control channel of a multi-beam mobile satellite communication system, an individual control channel is arranged for each beam in the direction from the satellite to the mobile station, and a plurality of control channels are arranged in common for each beam in the direction from the mobile station to the satellite. In this method, the multiple control channels from the mobile station to the satellite are classified into a random access control channel and a response signal dedicated control channel that responds to the control of the base station, and random access is performed when the control signal is transmitted at the request of the mobile station. When a control channel is used and a control signal is transmitted by an instruction from the base station, the control channel access method uses a corresponding response signal dedicated control channel.

〔作 用〕[Work]

本発明は上述のように、大量の衛星内消費電力を必要と
する衛星から移動局方向への制御チャネルは、ビーム内
トラヒックに応じて配置し、衛星内消費電力の少ない移
動局から衛星向けの制御チャネルは、複数チャネルずつ
各ビームに配置した制御チャネル構成を用い、移動局か
ら衛星方向の複数制御チャネルをランダムアクセス用制
御チャネルと基地局の制御に応答する応答信号専用制御
チャネルに区別し、一方、基地局から移動局方向は区別
せず共用とし、移動局が移動局の要求で制御信号を送信
する場合はランダムアクセス用制御チャネルにアクセス
し、基地局からの指示で制御信号を送信する場合は該当
する応答信号専用制御チャネルにアクセスするものであ
る。According to the present invention, as described above, the control channel from the satellite that requires a large amount of intra-satellite power consumption to the mobile station is arranged according to the intra-beam traffic, and the control channel from the mobile station with low intra-satellite power consumption to the satellite is The control channel uses a control channel configuration in which a plurality of channels are arranged in each beam, and a plurality of control channels in the satellite direction from the mobile station are classified into a random access control channel and a response signal dedicated control channel that responds to the control of the base station, On the other hand, the direction from the base station to the mobile station is shared without distinction.When the mobile station transmits a control signal at the request of the mobile station, it accesses the random access control channel and transmits the control signal according to an instruction from the base station. In this case, the control channel dedicated to the corresponding response signal is accessed.

〔実施例〕〔Example〕

第１図は、本発明の一実施例を説明する図であって、1a
は第１ビーム、1bは第２ビーム、1cは第３ビーム、２は
マルチビーム衛星、3a,3bはランダムアクセスチャネ
ル、４は応答信号専用チャネル、5aは第１ビームの移動
局向けチャネル、5bは第２ビームの移動局向けチャネ
ル、5cは第３ビームの移動局向けチャネル、６は基地
局、7aは第１ビーム用受信部、7bは第２ビーム用受信
部、7cは第３ビーム用受信部、８はランダムアクセス信
号識別器、９は応答信号識別器、10は送信部、11は分配
器、12はバッファ、13は合成器、14は回線制御部、15は
交換局を表わしており、３ビームより成るサービスエリ
アに本発明の制御チャネル構成を適用したシステム構成
の例を示しており、基地局６から移動局向けの制御チャ
ネル5a,5b,5cは、それぞれのビームに１チャネルずつ配
置し、また、移動局から基地局６向けの制御チャネル
は、全ビーム1a,1b,1c共通に３チャネルずつ各ビームに
配置した場合を示している。FIG. 1 is a diagram for explaining one embodiment of the present invention,
Is a first beam, 1b is a second beam, 1c is a third beam, 2 is a multibeam satellite, 3a and 3b are random access channels, 4 is a response signal dedicated channel, 5a is a mobile station channel of the first beam, and 5b Is a second beam mobile station channel, 5c is a third beam mobile station channel, 6 is a base station, 7a is a first beam receiver, 7b is a second beam receiver, and 7c is a third beam Receiving unit, 8 is a random access signal discriminator, 9 is a response signal discriminator, 10 is a transmitting unit, 11 is a distributor, 12 is a buffer, 13 is a combiner, 14 is a line control unit, and 15 is a switching center. 2 shows an example of a system configuration in which the control channel configuration of the present invention is applied to a service area consisting of 3 beams, and one control channel 5a, 5b, 5c for the base station 6 to the mobile station is provided for each beam. The mobile station controls the base station 6 Channel, total beam 1a, 1b, shows the case of arranging the respective beam portions 1c common to three channels.

同図において、信号識別器8,9は、１台の移動局から送
信された信号が隣接ビームに配置された同一周波数の制
御チャネルによっても基地局６へ伝送された時、両信号
の内から１信号のみを選択出力するために設けている。In the figure, when the signals transmitted from one mobile station are also transmitted to the base station 6 by the control channel of the same frequency arranged in the adjacent beam, the signal discriminators 8 and 9 It is provided to selectively output only one signal.

また、バッファ12は、基地局６が同一時刻に異なるビー
ムの移動局へ応答要求信号を送信しても、基地局６が各
移動局に要求信号を送信したのと同一順番で、応答信号
専用チャネルに移動局の信号がアクセスされるように設
けている。なお、応答信号専用チャネル４が複数ある場
合には、基地局内バッファ12を各応答専用チャネル毎に
設けて送信時間を制御することにより、移動局からの応
答信号が同時に同一チャネルに加わることはない。Even if the base station 6 transmits response request signals to mobile stations of different beams at the same time, the buffer 12 is dedicated to response signals in the same order as the base station 6 transmitted the request signals to the mobile stations. The channel is provided so that the mobile station signal can be accessed. When there are a plurality of response signal dedicated channels 4, the response signal from the mobile station is not simultaneously added to the same channel by providing the buffer 12 in the base station for each response dedicated channel to control the transmission time. .

第２図は、本発明を適用する移動局の構成の例を示して
おり、16は移動局アンテナ、17は移動機、18はハンドセ
ット、19は送受信アンテナ共用器、20は送信部、21は送
信用シンセサイザ、22は受信用シンセサイザ、23は受
部、24はコントローラ、を表わしている。FIG. 2 shows an example of the configuration of a mobile station to which the present invention is applied. 16 is a mobile station antenna, 17 is a mobile device, 18 is a handset, 19 is a transmission / reception antenna duplexer, 20 is a transmitter, and 21 is a transmitter. A synthesizer for transmission, 22 is a synthesizer for reception, 23 is a receiving section, and 24 is a controller.

同図において、受信用シンセサイザ22は、基地局６から
移動局方向のチャネル5a,5b,5cに、受信機23の周波数を
設定するために設けており、また、送信用シセサイザ21
は、受信用チャネル5a,5b,5cとは独立の複数送信チャネ
ル3a,3b,4から１チャネル選択するために設けている。In the figure, a receiving synthesizer 22 is provided to set the frequency of the receiver 23 on the channels 5a, 5b, 5c from the base station 6 to the mobile station, and the transmitting synthesizer 21 is also provided.
Is provided for selecting one channel from a plurality of transmission channels 3a, 3b, 4 independent of the reception channels 5a, 5b, 5c.

応答信号専用チャネル４が複数ある時のチャネル選択
は、移動局の群番号と応答信号専用チャネル番号を一対
一に対応させるか、あるいは基地局６からの信号にチャ
ネル番号を付加して応答要求信号を伝送することにより
実現できる。When there are plural response signal dedicated channels 4, the group number of the mobile station and the response signal dedicated channel number are made to correspond one-to-one, or the channel number is added to the signal from the base station 6 and the response request signal is added. Can be realized by transmitting.

第３図は、実施例の応答要求信号の一例として、あるビ
ームの移動局へ着信信号があった時の基地局と移動局間
の信号シーケンスを示している。以下、第１図〜第３図
を用いて移動局が第１ビーム1aにいると仮定して、基地
局６と移動局間の着信処理を説明する。FIG. 3 shows, as an example of the response request signal of the embodiment, a signal sequence between the base station and the mobile station when there is an incoming signal to the mobile station of a certain beam. Hereinafter, the incoming call process between the base station 6 and the mobile station will be described with reference to FIGS. 1 to 3 assuming that the mobile station is in the first beam 1a.

着信信号が交換局15に到着すると、回線制御部14は基地
局６内のバッファ12に着信信号を入力する。バッファ12
に一旦蓄積された着信信号は、１信号づつ取り出されて
分配器11により第１ビーム1a用送信器への経路が選択さ
れる。そして、移動局からの応答を必要としない回線制
御部14からの信号と合成器13により合成され、送信部10
の第１ビーム用送信器に入力されて、衛星２経由で移動
局に送信される。この時、回線制御部は、着信信号に対
して応答要求フラグを“1"に設定し、移動局から応答信
号を必要としない信号に対しては応答要求フラグに“0"
を設定する。When the incoming signal arrives at the exchange 15, the line controller 14 inputs the incoming signal to the buffer 12 in the base station 6. Buffer 12
The incoming signals that have been temporarily stored in 1 are taken out one by one, and the distributor 11 selects a route to the transmitter for the first beam 1a. Then, the signal from the line control unit 14 that does not require a response from the mobile station is combined by the combiner 13, and the transmission unit 10
Is transmitted to the mobile station via the satellite 2. At this time, the line control unit sets the response request flag to "1" for the incoming signal, and sets the response request flag to "0" for the signal that does not require the response signal from the mobile station.
To set.

第１ビーム1aの移動局は、“1"に設定された応答要求フ
ラグ25aの着信信号26を受信すると、受信用シンセサイ
ザ出力は一定とし、送信用シンセサイザ21出力をコント
ローラ24により切り替える。そして、送信部20の送信周
波数を応答信号専用チャネル32の周波数に設定し、応答
信号29を送信する。なお、移動局は“0"に設定された応
答要求フラグ25bの信号を検出すると、ランダムアクセ
ス信号30a,30bにガードタイム31を付加し、ランダムア
クセスチャネル33により信号を送信することができる。When the mobile station of the first beam 1a receives the incoming signal 26 of the response request flag 25a set to "1", the output of the synthesizer for reception is made constant and the output of the synthesizer for transmission 21 is switched by the controller 24. Then, the transmission frequency of the transmission unit 20 is set to the frequency of the response signal dedicated channel 32, and the response signal 29 is transmitted. When the mobile station detects the signal of the response request flag 25b set to “0”, it can add the guard time 31 to the random access signals 30a and 30b and transmit the signal through the random access channel 33.

応答信号32は、衛星２を経由して基地局６の受信部7aの
応答信号専用チャネル受信機に入力される。受信機では
入力信号を復調し、復調後のベースバンド信号を応答信
号識別器９に入力する。識別器９に入力された信号は、
信号内の移動局番号を基に他の受信機から入力された信
号と比較され、同一信号が入力されたと判断した場合に
は１信号のみを取り出して回線制御部14に応答信号を入
力する。The response signal 32 is input to the response signal dedicated channel receiver of the receiving unit 7a of the base station 6 via the satellite 2. The receiver demodulates the input signal and inputs the demodulated baseband signal to the response signal discriminator 9. The signal input to the discriminator 9 is
Based on the mobile station number in the signal, it is compared with the signal input from another receiver, and if it is determined that the same signal is input, only one signal is extracted and the response signal is input to the line control unit 14.

回線制御部は、移動局からの応答信号に対して通信用チ
ャネル番号等の後続信号を送信するか否かを判断し、必
要がある場合には移動局側へ信号を送信する。The line control unit determines whether or not to transmit a subsequent signal such as a communication channel number in response to the response signal from the mobile station, and transmits the signal to the mobile station side when necessary.

〔発明の効果〕〔The invention's effect〕

以上説明したように本発明によれば、回線効率は高いが
大量の衛星内消費電力を必要とする衛星から移動局向け
の制御チャネルはビーム単位に配置し、衛星内消費電力
の少ない移動局から衛星向けの制御チャネルは１ビーム
内に複数チャネルを配置して、複数の移動局から衛星向
け制御チャネルをランダムアクセス信号用チャネルと応
答信号用チャネルに分離しているので、衛星内消費電力
については、ランダムアクセス信号用と着信信号用を１
チャネルで共用してビーム単位に配置する制御チャネル
構成と同等になり、また、ランダムアクセス信号と応答
信号とが同一チャネルにより伝送されないので、ランダ
ムアクセスの発信禁止期間を設ける必要がないから、応
答信号が長くなっても衝突率が増大しないと言う利点が
ある。As described above, according to the present invention, a control channel for a mobile station from a satellite that has a high line efficiency but requires a large amount of intra-satellite power consumption is arranged in beam units, and a mobile station with low intra-satellite power consumption As for the control channel for satellites, multiple channels are arranged in one beam to separate the control channel for satellites from a plurality of mobile stations into a channel for random access signal and a channel for response signal. , One for random access signal and one for incoming signal
It becomes the same as the control channel configuration that is shared by channels and arranged in beam units. Moreover, since the random access signal and the response signal are not transmitted on the same channel, it is not necessary to provide a random access transmission prohibition period. There is an advantage that the collision rate does not increase even if the length becomes longer.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明の一実施例を説明する図、第２図は本発
明を適用する移動局の構成の例を示す図、第３図は実施
例の移動局と基地局間の信号シーケンスの例を示す図で
ある。 1a……第１ビーム、1b……第２ビーム、1c……第３ビー
ム、２……マルチビーム衛星、3a,3b……ランダムアク
セスチャネル、４……応答信号専用チャネル、5a……第
１ビームの移動局向けチャネル、5b……第２ビームの移
動局向けチャネル、5c……第３ビームの移動局向けチャ
ネル、６……基地局、7a……第１ビーム用受信部、7b…
…第２ビーム用受信部、7c……第３ビーム用受信部、８
……ランダムアクセス信号識別器、９……応答信号識別
器、10……送信部、11……分配器、12……バッファ、13
……合成器、14……回線制御部、15……交換局、16……
移動局アンテナ、17……移動機、18……ハンドセット、
19……送受信アンテナ共用器、20……送信部、21……送
信用シンセサイザ、22……受信用シンセサイザ、23……
受部、24……コントローラ、25a,25b……応答要求フラ
グ、26……着信信号、27……伝搬遅延時間、28……信号
を受信してから送信するまでの待ち時間、29……応答信
号、30a,30b……ランダムアクセス信号、31……ガード
タイム、32……応答信号専用チャネル、33……ランダム
アクセスチャネルFIG. 1 is a diagram for explaining an embodiment of the present invention, FIG. 2 is a diagram showing an example of the configuration of a mobile station to which the present invention is applied, and FIG. 3 is a signal sequence between a mobile station and a base station of the embodiment. It is a figure which shows the example of. 1a ... 1st beam, 1b ... 2nd beam, 1c ... 3rd beam, 2 ... Multi-beam satellite, 3a, 3b ... Random access channel, 4 ... Response signal dedicated channel, 5a ... 1st Beam mobile station channel, 5b ... Second beam mobile station channel, 5c ... Third beam mobile station channel, 6 ... Base station, 7a ... First beam receiver, 7b ...
… Second beam receiver, 7c …… Third beam receiver, 8
...... Random access signal discriminator, 9 ...... Response signal discriminator, 10 ...... Transmission unit, 11 ...... Distributor, 12 ...... Buffer, 13
...... Combiner, 14 ...... Line control unit, 15 …… Switching station, 16 ……
Mobile station antenna, 17 …… mobile unit, 18 …… handset,
19 …… Transmit / receive antenna duplexer, 20 …… Transmitter, 21 …… Synthesizer for transmission, 22 …… Synthesizer for reception, 23 ……
Receiver, 24 ... Controller, 25a, 25b ... Response request flag, 26 ... Incoming signal, 27 ... Propagation delay time, 28 ... Waiting time from signal reception to transmission, 29 ... Response Signal, 30a, 30b ... Random access signal, 31 ... Guard time, 32 ... Response signal dedicated channel, 33 ... Random access channel

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】マルチビーム移動体衛星通信方式の制御チ
ャネルとして、衛星から移動局方向はビーム毎に個別の
制御チャネルを配置し、移動局から衛星方向は各ビーム
共通に複数制御チャネルを配置する方式において、 移動局から衛星方向の複数制御チャネルをランダムアク
セス用制御チャネルと基地局の制御に応答する応答信号
専用制御チャネルに区別し、移動局の要求で制御信号を
送信する場合はランダムアクセス制御チャネルを使用
し、基地局からの指示で制御信号を送信する場合は該当
する応答信号専用制御チャネルを使用することを特徴と
する制御チャネルアクセス方法。1. As a control channel for a multi-beam mobile satellite communication system, an individual control channel is arranged for each beam in the direction from the satellite to the mobile station, and a plurality of control channels are arranged in common for each beam in the direction from the mobile station to the satellite. In this method, the multiple control channels from the mobile station to the satellite are divided into a random access control channel and a response signal dedicated control channel that responds to the control of the base station, and when the control signal is transmitted at the request of the mobile station, random access control is performed. A control channel access method characterized in that when a control signal is transmitted using a channel in response to an instruction from a base station, a corresponding control channel dedicated to a response signal is used.
JP2202419A 1990-08-01 1990-08-01 Control channel access method Expired - Fee Related JPH0787419B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2202419A JPH0787419B2 (en) 1990-08-01 1990-08-01 Control channel access method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2202419A JPH0787419B2 (en) 1990-08-01 1990-08-01 Control channel access method

Publications (2)

Publication Number Publication Date
JPH0490221A JPH0490221A (en) 1992-03-24
JPH0787419B2 true JPH0787419B2 (en) 1995-09-20

Family

ID=16457197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2202419A Expired - Fee Related JPH0787419B2 (en) 1990-08-01 1990-08-01 Control channel access method

Country Status (1)

Country Link
JP (1) JPH0787419B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104243117B (en) 2006-06-01 2017-11-17 华为技术有限公司 Connection processing method, movement station and base station between movement station and base station

Also Published As

Publication number Publication date
JPH0490221A (en) 1992-03-24

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