JPH05316038A - Call transmission control method - Google Patents
Call transmission control methodInfo
- Publication number
- JPH05316038A JPH05316038A JP4117847A JP11784792A JPH05316038A JP H05316038 A JPH05316038 A JP H05316038A JP 4117847 A JP4117847 A JP 4117847A JP 11784792 A JP11784792 A JP 11784792A JP H05316038 A JPH05316038 A JP H05316038A
- Authority
- JP
- Japan
- Prior art keywords
- control
- station
- channel
- transmission
- mobile 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.)
- Granted
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、自動車電話通信システ
ムにおける無線基地局と移動局との間の制御チャネルの
送受信制御に関するものであり、特に移動局が捕捉する
発信制御チャネル情報を用いて輻輳を軽減する発信制御
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to transmission / reception control of a control channel between a radio base station and a mobile station in a mobile telephone communication system, and in particular, congestion is generated by using transmission control channel information captured by the mobile station. The present invention relates to a call origination control method for reducing the traffic.
【0002】[0002]
【従来の技術】従来の移動体通信である自動車電話で
は、既存設備である固定電話網に接続された複数の自動
車電話交換局と、これらの自動車電話交換局それぞれに
複数の無線回線制御局が接続され、この無線回線制御局
にさらに複数の無線基地局が接続されて構成されてい
る。そしてこの無線基地局が、担当するサービスエリア
内に移動してきた移動端末を積載した移動局からの無線
通信を受信して上記無線回線制御局、自動車電話交換局
を介して固定電話網に接続し、目的とする相手と回線接
続交換を行っている。この様な移動局より発信する制御
チャネルは制御局より全無線基地局経由で通報される発
信制御チャネル情報に基づき無線区間のトラフィック状
況とは無関係に固定であった。2. Description of the Related Art In a conventional mobile telephone, which is a mobile communication, a plurality of mobile telephone exchanges connected to a fixed telephone network, which is an existing facility, and a plurality of wireless line control stations are provided in each of these mobile telephone exchanges. A plurality of wireless base stations are further connected to this wireless circuit control station. Then, this wireless base station receives wireless communication from a mobile station loaded with mobile terminals that have moved within the service area in charge and connects to the fixed telephone network through the above-mentioned wireless line control station and car telephone exchange office. , The line connection is exchanged with the intended other party. The control channel transmitted from such a mobile station is fixed irrespective of the traffic situation in the wireless section based on the transmission control channel information transmitted from the control station via all wireless base stations.
【0003】この従来の発信制御について図2を用いて
説明する。この図2において移動局5と、無線基地局4
とがあって、この無線基地局4と制御局1とが固定回線
で接続されている。この移動局5と無線基地局4との間
の下り制御信号L6の情報、つまり上り発信制御チャネ
ル及び発信許可情報等に基づいて上り発信制御信号L5
を上げている。このとき移動局5と無線基地局4との間
の無線使用状況とは無関係に上り発信制御信号L5を上
げていた為、輻輳状態の場合は同時に複数の移動局5が
発信する可能性が高くなり上記上り発信制御信号L5は
衝突のためデータエラーとなり、制御局1へ通報されな
い状況の頻度が高くなる。同時発信等によるデータエラ
ーがなく、無線基地局4で正しく受信された下り制御信
号L6だけが制御信号L7として制御局1へ通報され呼
が制御される。This conventional transmission control will be described with reference to FIG. In FIG. 2, the mobile station 5 and the radio base station 4
Therefore, the radio base station 4 and the control station 1 are connected by a fixed line. Based on the information of the downlink control signal L6 between the mobile station 5 and the radio base station 4, that is, the uplink transmission control channel and the transmission permission information, etc., the uplink transmission control signal L5.
Is raised. At this time, since the uplink transmission control signal L5 is raised regardless of the radio use status between the mobile station 5 and the radio base station 4, there is a high possibility that a plurality of mobile stations 5 will transmit at the same time in the case of congestion. As a result, the uplink transmission control signal L5 causes a data error due to a collision, and the frequency of situations where the control station 1 is not notified increases. Only the downlink control signal L6 correctly received by the radio base station 4 without any data error due to simultaneous transmission is notified to the control station 1 as the control signal L7 to control the call.
【0004】[0004]
【発明が解決しようとする課題】しかしながら上述した
従来の無線区間の発信制御では、無線区間の輻輳状態時
では、同時に複数の移動局から発信される可能性が高
く、互いにデータが衝突してエラーを発生する頻度が多
くなる。このため、移動局の発信した呼が受け付けられ
ないために再度発信するが上記同様の現象が再び発生
し、呼が結局制御局1に受け付されない状況となり、輻
輳状況を緩和することが困難であった。However, in the above-described conventional radio section transmission control, there is a high possibility that a plurality of mobile stations will simultaneously transmit when the radio section is congested, and data collisions will cause an error. Will occur more frequently. For this reason, since the call originated by the mobile station is not accepted and the call is originated again, the same phenomenon as described above occurs again, and the call is eventually not accepted by the control station 1, and it is difficult to alleviate the congestion situation. there were.
【0005】本発明の目的は、このような従来の問題点
を除去して、簡易な方法によって無線区間の輻輳状態を
軽減できる発信制御方法を提供しようとするものであ
る。An object of the present invention is to eliminate the above-mentioned conventional problems and to provide a transmission control method capable of reducing the congestion state in the wireless section by a simple method.
【0006】[0006]
【課題を解決するための手段】上記課題を解決するため
の本発明の解決手段は、少なくとも一つの制御局の下
に、複数の無線基地局を配置し、制御局からの発信チャ
ネル情報を全無線基地局から同一周波数で各移動局に伝
送し、前記移動局が受信した前記発信チャネル情報に基
づき発信する移動通信システムの発信制御方法におい
て、前記制御局が制御する下り発信制御チャネルの使用
状況に応じて前記制御局が前記複数の無線基地局経由で
通報する発信チャネル情報の中に、前記移動局が発呼で
きる擬似チャネル情報を加えることによって上り発信制
御チャネルの輻輳状態を軽減することを特徴とする。According to a solution of the present invention for solving the above-mentioned problems, a plurality of radio base stations are arranged under at least one control station and all transmission channel information from the control station is stored. In a transmission control method of a mobile communication system in which a radio base station transmits to each mobile station at the same frequency and transmits based on the transmission channel information received by the mobile station, a use situation of a downlink transmission control channel controlled by the control station In order to reduce the congestion state of the uplink transmission control channel by adding pseudo channel information that the mobile station can call in the transmission channel information notified by the control station via the plurality of radio base stations according to Characterize.
【0007】[0007]
【作用】移動局が発呼する場合のチャネルは、下り制御
信号の情報として制御局から複数の無線基地局経由で各
移動局に通報される。制御局等で発生した障害等の後回
線が回復した時は、多数の移動局が一斉に発信するため
無線区間は輻輳状態となりデータの衝突が起こること
を、下り制御無線信号L4によって各移動局に示す空き
チャネルに擬似チャネルを設け、この擬似チャネルによ
って移動局に発呼させる。擬似チャネルによる発呼で
は、回線接続が行われないので、再度の移動局による発
呼処理を促すことになり、上り発信制御無線信号L3の
衝突は回避でき、輻輳状態を軽減できるように作用す
る。The channel used when the mobile station makes a call is notified from the control station to each mobile station via a plurality of radio base stations as information of the downlink control signal. When the line recovers after a failure such as a control station, a large number of mobile stations transmit at the same time and the wireless section becomes congested and data collision occurs. A pseudo channel is provided in the empty channel indicated by and the mobile station is called by this pseudo channel. Since the line connection is not made in the call by the pseudo channel, the call process by the mobile station is prompted again, the collision of the uplink transmission control radio signal L3 can be avoided, and the congestion state can be reduced. ..
【0008】[0008]
【実施例】次に本発明の一実施例について図1を参照し
て以下に説明する。図1は本発明の一実施例のブロック
図である。制御局1は複数の無線基地局4を有してい
る。この複数の無線基地局4それぞれは電波の届く距離
を示す無線基地局の電界強度6をゾーンとして備えてい
る。そして各無線基地局4の無線基地局の電界強度6内
に在圏する移動局5と無線通信を行っている。EXAMPLE An example of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram of an embodiment of the present invention. The control station 1 has a plurality of radio base stations 4. Each of the plurality of wireless base stations 4 is provided with a zone of the electric field strength 6 of the wireless base stations, which indicates the reach of the radio wave. Each wireless base station 4 is in wireless communication with the mobile station 5 located within the electric field strength 6 of the wireless base station.
【0009】制御局1は、複数の無線基地局4より受信
する制御信号を判定して、各無線基地局4への下り制御
信号の情報内容である、上り発信制御チャネルを制御す
る。詳しくは、制御局1にある制御回路2が、移動局か
らの発呼信号を送出するための上記上り発信制御チャネ
ルの輻輳状況に応じて、下り信号の情報内容を制御す
る。尚、制御局1の制御回路2と制御信号送受信回路3
との間の制御信号L1は、制御信号送受信回路3より受
信した発信信号の使用状況情報と、制御局1から制御回
路2への下り制御信号つまり制御局1が発信する時に使
用するチャネル等の情報とから構成されている。そし
て、制御局1にある制御信号送受信回路3は複数の無線
基地局4との間の制御信号L2の送受信をする回路であ
って、下り制御チャネルを利用して一斉に複数の無線基
地局4へ情報を通報する。又無線基地局4から上がって
来た制御信号L2の発信制御信号等を受信し、制御回路
2へ通報する。無線基地局4は、各ゾーンである電界強
度6を移動する移動局5との制御信号L3,L4の送受
信をする。この上り発信制御無線信号L3は移動局5よ
り無線基地局4へ向かって発せられる発信制御信号で
(通常上り発信制御信号と言う)である。下り制御無線
信号L4は下り制御信号で無線基地局4から移動局5へ
通報される無線制御信号である。この下り制御無線信号
L4の情報は移動局5が発信する時のチャネル等であ
る。尚、電界強度6は各無線基地局4で発信する電波の
有効到達距離範囲を示す。The control station 1 determines a control signal received from a plurality of radio base stations 4 and controls an uplink transmission control channel, which is the information content of the downlink control signal to each radio base station 4. More specifically, the control circuit 2 in the control station 1 controls the information content of the downlink signal according to the congestion situation of the uplink transmission control channel for transmitting the call signal from the mobile station. The control circuit 2 of the control station 1 and the control signal transmission / reception circuit 3
The control signal L1 between the control signal transmitting / receiving circuit 3 and the use status information of the transmission signal received from the control signal transmitting / receiving circuit 3 is a downlink control signal from the control station 1 to the control circuit 2, that is, the channel used when the control station 1 transmits. It is composed of information and. The control signal transmission / reception circuit 3 in the control station 1 is a circuit that transmits / receives the control signal L2 to / from the plurality of radio base stations 4, and the plurality of radio base stations 4 are simultaneously transmitted using the downlink control channel. Report information to. Also, it receives a transmission control signal and the like of the control signal L2 coming from the radio base station 4 and notifies the control circuit 2 of it. The radio base station 4 transmits / receives control signals L3 and L4 to / from the mobile station 5 moving in the electric field strength 6 in each zone. The uplink transmission control radio signal L3 is a transmission control signal transmitted from the mobile station 5 to the radio base station 4 (normally referred to as an uplink transmission control signal). The downlink control radio signal L4 is a radio control signal transmitted from the radio base station 4 to the mobile station 5 as a downlink control signal. The information of the downlink control radio signal L4 is a channel or the like when the mobile station 5 transmits. The electric field strength 6 indicates the effective range of radio waves transmitted from each radio base station 4.
【0010】以上の構成において、基地局側の故障が回
復すると、多数の移動局5が一斉に発信するため無線区
間は輻輳状態となり、上り発信制御無線信号L3同士が
衝突するためデータが壊れてしまう。このため再び移動
局5は発信することとなり輻輳がより一層激しい状況と
なる。下り制御無線信号L4の情報は移動局5が発信す
る時のチャネル等を含んでいて、下り制御無線信号L4
の情報は制御回路2が下り制御無線信号L4つまり制御
信号L1の上り制御信号の輻輳時に、実際使用していな
い実際の発呼を行うチャネルとは異なる、擬似チャネル
を含ませたものである。移動局5は下り制御無線信号L
4の擬似チャネルを捕捉してそのチャネルで発信する
が、制御が進行しないようになっている。前記移動局5
は或る一定時間後、再び下り制御無線信号L4の情報内
容を捕捉して発信する。その間複数の移動局5からの同
時発呼の確率は軽減することになる。これにより輻輳状
態を軽減できることになる。In the above structure, when the failure on the base station side is recovered, a large number of mobile stations 5 transmit all at once and the wireless section becomes congested, and the uplink transmission control wireless signals L3 collide with each other, resulting in data corruption. I will end up. For this reason, the mobile station 5 again transmits, and congestion becomes more severe. The information of the downlink control radio signal L4 includes the channel when the mobile station 5 originates, and the downlink control radio signal L4.
The information of (1) includes a pseudo channel which is different from a channel which is not actually used by the control circuit 2 when the downlink control radio signal L4, that is, the uplink control signal of the control signal L1 is congested. The mobile station 5 receives the downlink control radio signal L
The pseudo channel of 4 is captured and transmitted on that channel, but the control does not proceed. The mobile station 5
After a certain period of time, the information content of the downlink control radio signal L4 is captured and transmitted again. During that time, the probability of simultaneous calls from a plurality of mobile stations 5 is reduced. As a result, the congestion state can be reduced.
【0011】[0011]
【発明の効果】以上説明したように、基地局側が故障等
でダウンした後に、回復した場合等では移動局からの同
時発信の確率が高くなり、複数の移動局からの上り発信
制御信号が破壊されてしまう。この為上り制御信号の使
用状況に応じて制御局が擬似の上り発信用チャネルを包
含した情報を移動局へ通報することによって。移動局は
この擬似の発信用チャネルを捕捉して発信動作をする
が、失敗となり、ある一定時間後再度異なるチャネルを
捕捉して発信するため、同時発呼の確率が軽減され、輻
輳を緩和することができる。As described above, in the case where the base station side recovers after being down due to a failure or the like, the probability of simultaneous transmission from mobile stations is high, and the uplink transmission control signals from a plurality of mobile stations are destroyed. Will be done. Therefore, the control station notifies the mobile station of information including a pseudo uplink transmission channel according to the usage state of the uplink control signal. Although the mobile station captures this pseudo-originating channel and performs the transmitting operation, it fails and captures another channel again after a certain period of time and transmits, so the probability of simultaneous calls is reduced and the congestion is relieved. be able to.
【図1】本発明の一実施例に関するものであり、その構
成を示す回路図である。FIG. 1 is a circuit diagram showing a configuration of an embodiment of the present invention.
【図2】従来例の説明図である。FIG. 2 is an explanatory diagram of a conventional example.
1 制御局 2 制御回路 3 制御信号送受信回路 4 無線基地局 5 移動局 6 無線基地局の電界強度 L1 制御信号 L2 制御信号 L3 上り発信制御無線信号 L4 下り制御無線信号 L5 上り発信制御信号 L6 下り制御信号 L7 制御信号 1 control station 2 control circuit 3 control signal transmission / reception circuit 4 radio base station 5 mobile station 6 electric field strength of radio base station L1 control signal L2 control signal L3 upstream transmission control wireless signal L4 downlink control wireless signal L5 upstream transmission control signal L6 downlink control Signal L7 control signal
Claims (1)
線基地局を配置し、制御局からの発信チャネル情報を全
無線基地局から同一周波数で各移動局に伝送し、前記移
動局が受信した前記発信チャネル情報に基づき発信する
移動通信システムの発信制御方法において、 前記制御局が制御する下り発信制御チャネルの使用状況
に応じて前記制御局が前記複数の無線基地局経由で通報
する発信チャネル情報の中に、前記移動局が発呼できる
が、呼を確立できない擬似チャネル情報を加えることに
よって上り発信制御チャネルの輻輳状態を軽減すること
を特徴とする発信制御方法。1. A plurality of radio base stations are arranged under at least one control station, and transmission channel information from the control stations is transmitted from all radio base stations to each mobile station at the same frequency. In a transmission control method of a mobile communication system that transmits based on the received transmission channel information, a transmission in which the control station reports via the plurality of radio base stations according to the usage status of a downlink transmission control channel controlled by the control station. A call origination control method for reducing congestion of an uplink call origination control channel by adding to the channel information pseudo channel information that the mobile station can make a call but cannot establish a call.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4117847A JP2752845B2 (en) | 1992-05-12 | 1992-05-12 | Outgoing call control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4117847A JP2752845B2 (en) | 1992-05-12 | 1992-05-12 | Outgoing call control method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05316038A true JPH05316038A (en) | 1993-11-26 |
JP2752845B2 JP2752845B2 (en) | 1998-05-18 |
Family
ID=14721750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4117847A Expired - Lifetime JP2752845B2 (en) | 1992-05-12 | 1992-05-12 | Outgoing call control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2752845B2 (en) |
-
1992
- 1992-05-12 JP JP4117847A patent/JP2752845B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2752845B2 (en) | 1998-05-18 |
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