JP2585455B2 - Communication Channel Assignment Method for Mobile Digital Communication System - Google Patents
Communication Channel Assignment Method for Mobile Digital Communication SystemInfo
- Publication number
- JP2585455B2 JP2585455B2 JP2147760A JP14776090A JP2585455B2 JP 2585455 B2 JP2585455 B2 JP 2585455B2 JP 2147760 A JP2147760 A JP 2147760A JP 14776090 A JP14776090 A JP 14776090A JP 2585455 B2 JP2585455 B2 JP 2585455B2
- Authority
- JP
- Japan
- Prior art keywords
- communication channel
- mobile station
- channel
- communication
- base station
- 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
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、移動体デジタル通信システムの通信チャ
ネル割当方式に関し、特に移動体デジタル通信における
多元同時接続制御に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication channel allocation method for a mobile digital communication system, and more particularly, to a multiple access control in mobile digital communication.
第３図（ａ）は従来のこの種の通信チャネル割当方式
の一例であり、図において、１は移動局より送信する上
り制御チャネル、２は基地局より送信する下り制御チャ
ネルであり、この制御チャネル1,2は耐妨害性を考慮し
てSS（Spread Spectrum）通信により伝送される。ま
た、３は上りの通信チャネル、４は下りの通信チャネル
である。FIG. 3 (a) shows an example of this type of conventional communication channel allocation method. In the figure, reference numeral 1 denotes an uplink control channel transmitted from a mobile station, and 2 denotes a downlink control channel transmitted from a base station. Channels 1 and 2 are transmitted by SS (Spread Spectrum) communication in consideration of interference resistance. Reference numeral 3 denotes an uplink communication channel, and reference numeral 4 denotes a downlink communication channel.
第３図（ｂ）は従来の通信チャネル割当方式の他の一
例であり、５は基地局よりそのチャネルが空いているこ
とを通知するための空信号入り通信チャネルである。FIG. 3 (b) shows another example of the conventional communication channel assignment method, and reference numeral 5 denotes a communication channel with an empty signal for notifying that the channel is free from the base station.
次に、第３図（ａ）を用いてその動作について説明す
る。移動局は、通信開始時、上り制御チャネル１を用い
て基地局に対し、通信チャネル割当を要求する。基地局
は、これを受け下り制御チャネル２で通信チャネルを通
知する。以後、移動局と基地局で通信チャネル3,4を用
いて通信を行う。Next, the operation will be described with reference to FIG. At the start of communication, the mobile station requests the base station to allocate a communication channel using the uplink control channel 1. The base station receives this and notifies the communication channel on the downlink control channel 2. Thereafter, communication is performed between the mobile station and the base station using the communication channels 3 and 4.
次に第３図（ｂ）を用いて動作について説明する。 Next, the operation will be described with reference to FIG.
基地局は、現在空いている通信チャネルを監視してお
り、その空通信チャネルの下りチャネルに空信号を挿入
し、空信号入り下り通信チャネル５として送信する。The base station monitors the currently available communication channel, inserts an empty signal into the downlink channel of the empty communication channel, and transmits the signal as a downlink communication channel 5 with an empty signal.
移動局ではこれを認識し、その空信号入り通信チャネ
ル５とペアの上り通信チャネルでチャネル要求を送信す
る。The mobile station recognizes this and transmits a channel request on the uplink communication channel paired with the communication channel 5 containing the empty signal.
以降、移動局と基地局は通信チャネル３、４を用いて
通信を行うと同時に、基地局では、別の空の下り通信チ
ャネルで空信号を送出する。Thereafter, the mobile station and the base station perform communication using the communication channels 3 and 4, and at the same time, the base station transmits an empty signal through another empty downlink communication channel.
従来の通信チャネル割当方式は、以上のように構成さ
れているので、第３図（ａ）の方式では、基地局より移
動局に通信チャネルを割当てる際に、複数の移動局に対
し同時にチャネル割当ができない。Since the conventional communication channel allocating method is configured as described above, in the method of FIG. 3A, when allocating a communication channel from a base station to a mobile station, the channel is simultaneously allocated to a plurality of mobile stations. Can not.
また第３図（ｂ）の方式では、通信中の移動局に対
し、基地局より新たな制御項目を通達できない等の問題
点があった。In addition, the method shown in FIG. 3 (b) has a problem that a new control item cannot be communicated from the base station to the communicating mobile station.
この発明は、上記のような問題点を解消するためにな
されたもので、複数の移動局に対し同時に通信チャネル
割当ができると共に、割当後の通信中の移動局に対し、
その移動局に接続された別端末への着信や通信中移動局
の送信出力制御等の新たな制御項目を通知できる通信チ
ャネル割当方式を得ることを目的とする。The present invention has been made in order to solve the above-described problems, and it is possible to simultaneously allocate a communication channel to a plurality of mobile stations, and to a mobile station in communication after the allocation,
It is an object of the present invention to obtain a communication channel allocation method capable of notifying a new control item such as an incoming call to another terminal connected to the mobile station or a transmission output control of a mobile station during communication.
この発明に係る移動体デジタル通信システムの通信チ
ャネル割当方式は、移動体デジタル通信システムにおい
て、通信チャネルの他にスペクトル拡散通信を用いた上
りおよび下り制御チャネルを設け、移動局より上り制御
チャネルで基地局に対し通信チャネル要求を送信し、か
つ基地局より下り制御チャネルの、複数に分割したタイ
ムスロットを用いて、要求のあった移動局の割り当て通
信チャネルを伝送するとともに、上記移動局に対し当該
移動局との距離に応じた発信順序制御情報を上記タイム
スロットを用いて伝送するようにしたものである。According to a communication channel allocation method for a mobile digital communication system according to the present invention, in a mobile digital communication system, an uplink and downlink control channel using spread spectrum communication is provided in addition to a communication channel, and a base station is provided by an uplink control channel from a mobile station. A communication channel request is transmitted to the station, and the base station transmits the allocated communication channel of the requested mobile station using the divided time slots of the downlink control channel, and transmits the request to the mobile station. The transmission order control information according to the distance from the mobile station is transmitted using the time slot.
また、基地局は移動局との距離に応じて発信順序制御
を通信チャネルスロットにより伝送するようにしたもの
である。Further, the base station transmits the transmission order control using the communication channel slot according to the distance from the mobile station.
この発明においては、上述のように構成したことによ
り、同時に複数の移動局へのチャネル割当てを可能にさ
せ、通信チャネルを割り当てた移動局に対し、その移動
局が通信中に他の制御項目を基地局により通知すること
を可能にさせるとともに、ガードタイムを広げることな
く移動体との距離に応じた発信順序制御を可能にさせ
る。In the present invention, with the above-described configuration, it is possible to allocate channels to a plurality of mobile stations at the same time, and to a mobile station to which a communication channel has been allocated, the mobile station can assign another control item during communication. In addition to enabling notification by the base station, transmission order control according to the distance to the moving object is enabled without extending the guard time.
また、基地局は移動局との距離に応じて発信順序制御
を通信チャネルスロットにより伝送するので、ガードタ
イムを広げることなく距離に応じた発信順序制御を通知
することができる。In addition, since the base station transmits the transmission order control using the communication channel slot according to the distance from the mobile station, the base station can notify the transmission order control according to the distance without extending the guard time.
以下、この発明の実施例を図について説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例による移動体デジタル通信
システムの通信チャネル割当方式を示し、図において、
10は時分割下り制御チャネルであり、従来の下り制御チ
ャネル２と同様に耐妨害性を考慮してSS（Spread Spect
rum）通信により伝送される。、６はフレーム同期エリ
ア、７は報知情報エリア、８は通信チャネル割当エリア
である。そしてこの時分割下り制御チャネル10が、6,7,
8のエリアに区分され、エリア6,7,8で構成される１ブロ
ックがｎ個で１周期となって繰り返し送信される。ま
た、通信チャネル割当エリア８はさらに複数の通信チャ
ネルスロット９に分割される。なお１は上り制御チャネ
ル、３は上り通信チャネル、４は下り通信チャネルであ
る。FIG. 1 shows a communication channel allocation method for a mobile digital communication system according to an embodiment of the present invention.
Reference numeral 10 denotes a time-division downlink control channel.
rum) transmitted by communication. , 6 are a frame synchronization area, 7 is a broadcast information area, and 8 is a communication channel allocation area. And this time division downlink control channel 10 is 6,7,
It is divided into eight areas, and one block composed of the areas 6, 7, 8 is repeatedly transmitted in n cycles in one cycle. The communication channel allocation area 8 is further divided into a plurality of communication channel slots 9. Note that 1 is an uplink control channel, 3 is an uplink communication channel, and 4 is a downlink communication channel.
次に動作について説明する。第１図において、移動局
は基地局に対し上り制御チャネル１でチャネル割当要求
を送出する。基地局は、これを受け時分割下り制御チャ
ネル10の通信チャネル割当エリア８の中の通信チャネル
スロット９に、チャネル要求を送出した移動局番号と共
に割当通信チャネルを指示する。さらに他の移動局がチ
ャネル要求を送出すれば、残りの空通信チャネルスロッ
ト９を用いて通信チャネル指示を行う。Next, the operation will be described. In FIG. 1, the mobile station sends a channel assignment request to the base station on uplink control channel 1. In response to this, the base station instructs the communication channel slot 9 in the communication channel allocation area 8 of the time division downlink control channel 10 together with the number of the mobile station that has transmitted the channel request, and the assigned communication channel. When another mobile station sends a channel request, a communication channel instruction is issued using the remaining empty communication channel slot 9.
また現在通信中の移動局に連接される他の端末に着信
があった場合、また基地局で上り通信チャネルの受信電
界強度をモニタしており、移動局が基地局の近傍で高出
力で送信している場合等は、その移動局にチャネル割当
を行ったタイムスロット９を用いて、着信通知，送信出
力低減等の制御を行う。Also, when there is an incoming call to another terminal connected to the mobile station that is currently communicating, the base station monitors the received electric field strength of the uplink communication channel, and the mobile station transmits with a high output near the base station. In such a case, control such as incoming call notification and transmission output reduction is performed using the time slot 9 in which the channel is allocated to the mobile station.
また、上記実施例では、通信チャネル割当方式につい
て説明したが、移動局からの発信順序の決められた多元
接続において、現在移動局では、基地局との距離のばら
つきを吸収するためのガードタイム11をとって送信して
いるが、第２図に示すように、図中左端に示す，基地局
からの下り制御チャネルのフレーム同期信号は右下向き
の破線により示されるように時間の経過とともに遠方に
伝搬して行くが、このフレーム同期信号に同期して、図
中の移動局１が上り制御チャネルでチャネル要求を送信
し、これが右上向きの破線により示されるように基地局
に向かって伝搬し、基地局がこれを受信してフレーム信
号送信時間からチャネル要求信号受信までの時間差を測
定することにより、基地局とチャネル要求を行った移動
局との距離の測定が可能となる。そして、移動局（仮に
ｎとする）が基地局より距離d1に居ることがわかった場
合、スロット91で移動局１と移動局ｎの送信順序を指定
することにより、運用中の多元接続網に途中から移動局
が加入した場合にも、距離に応じた発信順序制御を行う
ことにより、ガードタイム11を広げることなく、即ち、
ガードタイム11を、途中から移動局が加入しない場合と
同等の時間幅としたままで、基地局では移動局１とｎと
が衝突することなく、多元接続コントロールができる。Further, in the above embodiment, the communication channel allocation method has been described. However, in the multiple access in which the transmission order from the mobile station is determined, the guard time 11 for absorbing the variation in the distance from the base station is currently used in the mobile station. As shown in FIG. 2, the frame synchronization signal of the downlink control channel from the base station shown at the left end in FIG. In synchronization with this frame synchronization signal, the mobile station 1 in the figure transmits a channel request on an uplink control channel, which propagates toward the base station as indicated by a dashed line pointing upward and downward, The base station receives this and measures the time difference from the frame signal transmission time to the reception of the channel request signal, so that the distance between the base station and the mobile station that made the channel request can be measured. The ability. Then, when the mobile station (assumed as n) is found to have a distance d 1 from the base station, by specifying the order of transmission of the mobile station n and the mobile station 1 in the slot 9 1, a multiple access in operation Even when a mobile station joins the network halfway, by performing transmission order control according to the distance, without extending the guard time 11, that is,
With the guard time 11 set to the same time width as when the mobile station does not join from the middle, multiple access control can be performed at the base station without collision between the mobile stations 1 and n.
以上のように、この発明に係る移動体デジタル通信シ
ステムの通信チャネル割当方式によれば、移動体デジタ
ル通信システムにおいて、通信チャネルの他にスペクト
ル拡散通信を用いた上りおよび下り制御チャネルを設
け、移動局より上り制御チャネルで基地局に対し通信チ
ャネル要求を送信し、かつ基地局より下り制御チャネル
の、複数に分割したタイムスロットを用いて、要求のあ
った移動局の割り当て通信チャネルを伝送するととも
に、上記移動局に対し当該移動局との距離に応じた発信
順序制御情報を上記タイムスロットを用いて伝送するよ
うにしたので、同時に複数の移動局にチャネル割当てが
できるとともに、通信チャネルを割り当てた移動局に対
し、その移動局が通信中に他の制御項目を基地局により
通知することができ、しかも、ガードタイムを広げるこ
となく移動体との距離に応じた発信順序制御が可能にな
る効果がある。As described above, according to the communication channel assignment method of the mobile digital communication system according to the present invention, in the mobile digital communication system, in addition to communication channels, uplink and downlink control channels using spread spectrum communication are provided. The station transmits a communication channel request to the base station on the uplink control channel, and transmits the assigned communication channel of the requested mobile station using the divided time slots of the downlink control channel from the base station. Since the transmission order control information according to the distance to the mobile station is transmitted to the mobile station using the time slot, a channel can be allocated to a plurality of mobile stations at the same time, and a communication channel is allocated. The base station can notify the mobile station of other control items while the mobile station is communicating, Also, there is an effect that it is possible to outbound order control according to the distance between the moving body without increasing the guard time.
第１図はこの発明の一実施例による移動体デジタル通信
システムの通信チャネル割当方式を示す図、第２図はこ
の発明の他の実施例による通信チャネル割当方式を示す
図、第３図は従来の通信チャネル割当方式を示す図であ
る。 図において、１は上り制御チャネル、２は下り制御チャ
ネル、３は上り通信チャネル、４は下り通信チャネル、
５は空信号入り通信チャネル、６はフレーム同期エリ
ア、７は報知情報エリア、８は通信チャネル割当エリ
ア、９は通信チャネルスロット、10は時分割下り制御チ
ャネル、11はガードタイムである。 なお、図中、同一符号は同一、又は相当部分を示す。FIG. 1 is a diagram showing a communication channel assignment system of a mobile digital communication system according to one embodiment of the present invention, FIG. 2 is a diagram showing a communication channel assignment system according to another embodiment of the present invention, and FIG. FIG. 2 is a diagram showing a communication channel allocation method of FIG. In the figure, 1 is an uplink control channel, 2 is a downlink control channel, 3 is an uplink communication channel, 4 is a downlink communication channel,
Reference numeral 5 denotes a communication channel with an empty signal, 6 denotes a frame synchronization area, 7 denotes a broadcast information area, 8 denotes a communication channel allocation area, 9 denotes a communication channel slot, 10 denotes a time-division downlink control channel, and 11 denotes a guard time. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
よび下り制御チャネルを設け、 移動局より上り制御チャネルで基地局に対し通信チャネ
ル要求を送信し、 かつ基地局より下り制御チャネルの、複数に分割したタ
イムスロットを用いて、要求のあった移動局の割り当て
通信チャネルを伝送するとともに、 上記移動局に対し当該移動局との距離に応じた発信順序
制御情報を上記タイムスロットを用いて伝送することを
特徴とする移動体デジタル通信システムの通信チャネル
割当方式。In a mobile digital communication system, an uplink and downlink control channel using spread spectrum communication is provided in addition to a communication channel, a communication channel request is transmitted from a mobile station to a base station on an uplink control channel, and Using a plurality of divided time slots of a downlink control channel from the base station, the communication channel allocated to the requested mobile station is transmitted, and transmission order control is performed on the mobile station according to the distance from the mobile station. A communication channel allocation method for a mobile digital communication system, wherein information is transmitted using the time slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2147760A JP2585455B2 (en) | 1990-06-05 | 1990-06-05 | Communication Channel Assignment Method for Mobile Digital Communication System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2147760A JP2585455B2 (en) | 1990-06-05 | 1990-06-05 | Communication Channel Assignment Method for Mobile Digital Communication System |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0440024A JPH0440024A (en) | 1992-02-10 |
| JP2585455B2 true JP2585455B2 (en) | 1997-02-26 |
Family
ID=15437545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2147760A Expired - Fee Related JP2585455B2 (en) | 1990-06-05 | 1990-06-05 | Communication Channel Assignment Method for Mobile Digital Communication System |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2585455B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3302168B2 (en) * | 1994-04-05 | 2002-07-15 | 株式会社東芝 | Mobile radio communication system |
| JPH10173594A (en) | 1996-12-06 | 1998-06-26 | Hitachi Ltd | Code division multiple access communication system and sending power control method |
| JP4116925B2 (en) * | 2003-05-13 | 2008-07-09 | 松下電器産業株式会社 | Radio base station apparatus, control station apparatus, communication terminal apparatus, transmission signal generation method, reception method, and radio communication system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0722269B2 (en) * | 1983-09-16 | 1995-03-08 | 日本電信電話株式会社 | Discontinuous reception method in mobile radio |
| JPS62108626A (en) * | 1985-11-06 | 1987-05-19 | Meisei Electric Co Ltd | Incoming call connection control system of radiotelephony equipment |
| JPS63202144A (en) * | 1987-02-17 | 1988-08-22 | Mitsubishi Electric Corp | Automobile telephone system |
| JPH0262134A (en) * | 1988-08-29 | 1990-03-02 | Nippon Telegr & Teleph Corp <Ntt> | Radio communication control system |
-
1990
- 1990-06-05 JP JP2147760A patent/JP2585455B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0440024A (en) | 1992-02-10 |
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