JP2918956B2 - Channel assignment method - Google Patents
Channel assignment methodInfo
- Publication number
- JP2918956B2 JP2918956B2 JP3010390A JP3010390A JP2918956B2 JP 2918956 B2 JP2918956 B2 JP 2918956B2 JP 3010390 A JP3010390 A JP 3010390A JP 3010390 A JP3010390 A JP 3010390A JP 2918956 B2 JP2918956 B2 JP 2918956B2
- Authority
- JP
- Japan
- Prior art keywords
- channel
- communication
- radio
- wireless
- base stations
- 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
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は移動通信システムにおけるチャンネル割り当
て方式に関し、特に各無数基地局が移動局との通信に用
いる無線チャンネルを過去の使用実績をもとに決定する
チャンネル割り当て方式に関する。Description: FIELD OF THE INVENTION The present invention relates to a channel allocation system in a mobile communication system, and more particularly, to a radio channel used by each of innumerable base stations for communication with a mobile station based on past use results. Regarding the channel allocation method to be determined.
複数の無線基地局を配置することによりサービスエリ
アをカバーする移動通信システムでは、周波数有効利用
のために同一無線チャネルを地理的に再使用する方法が
とられている。そのためには正確な無線ゾーン設計に基
づく無線基地局配置およびチャンネル割り当てを行う必
要がある。しかし、建物内等ではこれが実現できない場
合があり、そのために様々なチャンネル割り当て方式が
提案されている。各無線基地局が移動局との通信に用い
る無線チャンネルをそれぞれの基地局が過去の使用実績
をもとに、すなわち、学習効果によって干渉の発生確率
が小さくなるように使用する無線チャンネルを決定する
方式もそれらのうち１つである。従来のこのようなチャ
ンネル割り当て方式の場合、制御局の処理負荷を避ける
ために各無線基地局それぞれが学習し、学習した情報を
蓄積するように構成されていた。2. Description of the Related Art In a mobile communication system in which a service area is covered by arranging a plurality of radio base stations, a method of geographically reusing the same radio channel for effective use of frequency is used. For that purpose, it is necessary to perform radio base station arrangement and channel assignment based on accurate radio zone design. However, this may not be realized in a building or the like, and various channel allocation methods have been proposed for that purpose. A radio channel used by each radio base station for communication with a mobile station is determined by each base station based on past use results, that is, a radio channel used so that the probability of occurrence of interference is reduced by a learning effect. The scheme is one of them. In the case of such a conventional channel assignment method, each radio base station learns and stores the learned information in order to avoid the processing load of the control station.
上述した従来のチャンネル割り当て方式は、学習の効
果が現われるまでは、干渉発生確率が所望の値におさえ
られない欠点がある。The above-described conventional channel allocation method has a disadvantage that the interference occurrence probability cannot be suppressed to a desired value until the learning effect appears.
本発明のチャンネル割り当て方式は、移動通信システ
ムのサービスエリアをカバーするように配置され制御局
によって統括制御される複数の無線基地局のそれぞれが
移動局との通信に用いる無線チャンネルを過去の使用実
績をもとに干渉発生確率が小さくなるように決定するチ
ャンネル割り当て方式において、前記無線基地局が前記
過去の使用実績を持たない動作開始時に前記無線基地局
のそれぞれごとにあらかじめ定めた前記無数チャネルあ
るいは前記無数チャンネルの群を最初に使用するように
構成される。The channel allocation method according to the present invention uses a radio channel used for communication with a mobile station by each of a plurality of radio base stations arranged to cover a service area of a mobile communication system and controlled by a control station. In the channel allocation method to determine the probability of occurrence of interference is small based on the innumerable channels or predetermined for each of the wireless base station at the start of operation when the wireless base station has no past use record or The group of innumerable channels is configured to be used first.
又、本発明のチャンネル割り当て方式は、前記無線基
地局の動作開始時に前記制御局が前記無線基地局のそれ
ぞれに前記あらかじめ定めた前記無線チャンネルあるい
は前記無線チャンネルの群を指定するように構成しても
よい。Further, the channel assignment method of the present invention is configured such that the control station designates the predetermined radio channel or the group of the radio channels to each of the radio base stations at the start of the operation of the radio base station. Is also good.
次に、本発明について図面を参照して説明する。 Next, the present invention will be described with reference to the drawings.
第１図は本発明の一実施例における無線チャンネルの
構成を説明するための図、第２図は本実施例のシステム
構成を示すブロック図である。FIG. 1 is a diagram for explaining a configuration of a wireless channel in one embodiment of the present invention, and FIG. 2 is a block diagram showing a system configuration of the present embodiment.
本実施例には１チャンネルの制御用無線チャンネル51
と50チャンネルの通信用無線チャンネル１〜50とが与え
られており、各無線基地局101〜110には制御用無線チャ
ンネル51を割り当てられた制御用無線機と通話用無線チ
ャンネル１〜50のすべてに同調可能な通話用無線機とが
トラヒックに応じて複数台設置されていて、これら両種
の無線機を制御する制御部が設けられている。また、移
動局200は制御用無線チャネル51を含めた51チャンネル
すべてに同調可能となっている。In this embodiment, one control wireless channel 51 is used.
And 50 wireless communication channels 1 to 50 are provided. Each of the wireless base stations 101 to 110 has a control wireless device to which the control wireless channel 51 is assigned and all of the communication wireless channels 1 to 50. A plurality of tunable communication radios are installed according to the traffic, and a control unit for controlling these two types of radios is provided. The mobile station 200 can tune to all 51 channels including the control wireless channel 51.
無線基地局101〜110の１つと移動局200との間に通話
路を設定する場合、その無線基地局は、制御用無線チャ
ンネル51にてチャンネル指定信号により移動局200が同
調する通話用無線チャンネルを移動局200に通知し、空
いている通話用無線機を同じ通話用無線チャンネルに同
調させ、移動局200からの切替完了通知を待ち受ける。
移動局200は指定された通話用無線チャンネルにその無
線機を同調させ、その通話用無線チャンネルが干渉がな
く使用可能な時は切替完了通知をその通話用無線チャン
ネルで送出し、使用不能のときは切替完了通知を送出せ
ずに制御用無線チャンネル51に戻り、待ち受ける。無線
基地局は、切替完了通知を受信できた場合はその通話用
無線チャンネルの使用優先順位を示す数値を増加させ、
受信できなかった場合は減少させて記憶する。When a communication path is set between one of the radio base stations 101 to 110 and the mobile station 200, the radio base station uses the control radio channel 51 to tune to the communication radio channel tuned to the mobile station 200 by the channel designation signal. To the mobile station 200, tune the vacant call radio to the same call radio channel, and wait for the switching completion notification from the mobile station 200.
The mobile station 200 tunes its radio to the specified call radio channel, and when the call radio channel is usable without interference, sends a switching completion notification on the call radio channel. Returns to the control wireless channel 51 without sending the switching completion notification and waits. If the wireless base station can receive the switching completion notification, the wireless base station increases the numerical value indicating the use priority of the communication wireless channel,
If it cannot be received, it is reduced and stored.
無線基地局101〜110は、移動局200に通知する通話用
無線チャンネルを決定するとき通話用無線チャンネル１
〜50の各チャンネル毎に記憶している使用優先順位を示
す数値を比較し、一番大きな値の通話用無線チャンネル
を選ぶようにしている。When the radio base stations 101 to 110 determine the radio channel for communication to be notified to the mobile station 200, the radio channel for communication 1
Numerical values indicating the use priorities stored for each channel of ~ 50 are compared, and the wireless channel for communication having the largest value is selected.
ところで、過去に通話用無線チャネルの使用実績がな
い場合、使用優先順位を示す数値は全通話用無線チャン
ネル同一の値としておき、使用優先順位を示す数値が同
じ場合はチャンネル番号の若番のものを使用するように
するとしたら、システムの動作開始時は、全無線基地局
は全通話用無線チャンネルとも同一の使用優先順位を示
す数値となっており、名無線基地局が最初に使用する通
話用無線チャンネルは若番のチャンネルである通話用無
線チャンネル１となり、同一チャンネル干渉が発生しや
すいことになる。By the way, if there has been no record of using the radio channel for communication in the past, the numerical value indicating the use priority is set to the same value for all radio channels for communication. If the system is to be used, when the system starts operation, all radio base stations will have the same priority in all radio channels for communication, and the name radio base station will use the first The radio channel is the call radio channel 1 which is the youngest channel, and co-channel interference is likely to occur.
ところが、本実施例では、無線基地局101〜110の動作
開始時、制御局300より、第１図に示すように、無線基
地局101〜110にそれぞれが使用する最も若番のチャンネ
ル番号として異なるチャンネル番号を通知し、無線基地
局101〜110は、すべての通話用無線チャンネルが同一の
使用優先順位の場合、通知された通話用無線チャンネル
を使用するので、少なくとも最初に使用する通話用無線
チャンネルでの同一チャンネル干渉を回避できる。However, in the present embodiment, when the operation of the radio base stations 101 to 110 starts, the control station 300 differs from the control station 300 as the lowest channel number used by each of the radio base stations 101 to 110, as shown in FIG. When the channel numbers are notified, the radio base stations 101 to 110 use the notified call radio channel when all the call radio channels have the same use priority, so that at least the first call radio channel is used. Can avoid co-channel interference.
なお、通話用無線チャンネル１〜５の群を無線基地局
101に通知し、通話用無線チャンネル６〜10の群を無線
基地局102に通知するというようにして、最初に使用す
る通話用無線チャンネルを群として通知し、無線基地局
101〜110は通知された群の最も若番のチャンネル番号の
通話用無線チャンネルを最初に使用するようにしても効
果は同じである。In addition, a group of wireless channels 1 to 5 for communication is defined as a wireless base station.
The base station 101 notifies the base station 102 of the call wireless channels 6 to 10 by notifying the base station 102 of the call wireless channels.
For 101 to 110, the same effect can be obtained even if the communication radio channel with the lowest channel number of the notified group is used first.
以上説明したように本発明は、各無線基地局が移動局
との通信に用いる無線チャンネルを過去の使用実績をも
とに干渉発生確率が小さくなるように決定するチャンネ
ル割り当て方式を用いる場合、各無線基地局は無線チャ
ンネルの過去の使用実績を持たない動作開始時でも干渉
発生確率を低下できる効果がある。As described above, the present invention, when using a channel allocation method in which each radio base station determines a radio channel used for communication with a mobile station so that the probability of occurrence of interference is reduced based on past use results, The wireless base station has the effect of reducing the probability of interference occurrence even at the start of operation when the wireless channel has no past use record.
第１図は本発明の一実施例における無線チャンネルの構
成を説明するための図、第２図は本実施例のシステム構
成を示すブロック図である。 １〜50…通話用無線チャンネル、51…制御用無線チャン
ネル、101〜110…無線基地局、200…移動局、300…制御
局。FIG. 1 is a diagram for explaining a configuration of a wireless channel in one embodiment of the present invention, and FIG. 2 is a block diagram showing a system configuration of the present embodiment. 1 to 50: radio channel for communication, 51: radio channel for control, 101 to 110: radio base station, 200: mobile station, 300: control station.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 花澤 徹郎 東京都千代田区内幸町１丁目１番６号 日本電信電話株式会社内 (56)参考文献 特開 昭64−89827（ＪＰ，Ａ) 特開 平３−117229（ＪＰ，Ａ) 特開 昭61−280130（ＪＰ，Ａ) 特開 平１−132231（ＪＰ，Ａ) 特開 昭61−244137（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) H04B 7/24 - 7/26 H04Q 7/00 - 7/38 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tetsuro Hanazawa Nippon Telegraph and Telephone Corporation, 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo (56) References JP-A-64-89827 (JP, A) 3-117229 (JP, A) JP-A-61-280130 (JP, A) JP-A-1-132231 (JP, A) JP-A-61-244137 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) H04B 7/24-7/26 H04Q 7/00-7/38
Claims (1)
ーするように配置され制御局によって統括制御される複
数の無線基地局のそれぞれが移動局との通信に用いる通
話用無線チャンネルを過去の使用実績をもとに干渉発生
確率が小さくなるように決定するチャンネル割り当て方
式において、 前記無線基地局が前記過去の使用実績を持たない動作開
始時に前記無線基地局のそれぞれごとにあらかじめ定め
た異なる前記通話用無線チャンネルあるいは前記通話用
無線チャンネル群を最初に使用するように構成され、 前記無線基地局の使用開始時に前記制御局が前記無線基
地局のそれぞれに前記あらかじめ定めた前記通話用無線
チャンネルあるいは前記通話用無線チャンネルの群を指
定するように構成した ことを特徴とするチャンネル割り当て方式。A plurality of radio base stations arranged so as to cover a service area of a mobile communication system and controlled by a control station each use a communication radio channel used for communication with the mobile station based on past use results. In the channel allocation method which is determined so that the probability of occurrence of interference is originally small, the radio base station is different from the call radio defined in advance for each of the radio base stations at the start of operation having no past use record Channel or the wireless channel group for communication is configured to be used first, and when the use of the wireless base station is started, the control station sets the predetermined wireless channel for communication or the communication for each of the wireless base stations. Channel assignment characterized by designating a group of wireless channels Formula.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3010390A JP2918956B2 (en) | 1990-02-08 | 1990-02-08 | Channel assignment method |
| EP91101680A EP0441372B1 (en) | 1990-02-08 | 1991-02-07 | Method of assigning optimal channel in multi-station radio communications system |
| CA002035963A CA2035963C (en) | 1990-02-08 | 1991-02-07 | Method of assigning optimal channel in multi-station radio communications system |
| DE69111629T DE69111629T2 (en) | 1990-02-08 | 1991-02-07 | Procedure for optimal channel allocation in a radio system with several stations. |
| US07/652,722 US5263176A (en) | 1990-02-08 | 1991-02-08 | Method of assigning optimal channel in multi-station radio communications system |
| AU70916/91A AU646835B2 (en) | 1990-02-08 | 1991-02-08 | Method of assigning optimal channel in multi-station radio communications system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3010390A JP2918956B2 (en) | 1990-02-08 | 1990-02-08 | Channel assignment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03234131A JPH03234131A (en) | 1991-10-18 |
| JP2918956B2 true JP2918956B2 (en) | 1999-07-12 |
Family
ID=12294447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3010390A Expired - Fee Related JP2918956B2 (en) | 1990-02-08 | 1990-02-08 | Channel assignment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2918956B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5457734A (en) * | 1993-07-08 | 1995-10-10 | At&T Ipm Corp. | Multi-band cellular radiotelephone system architecture |
| JP2011250158A (en) * | 2010-05-27 | 2011-12-08 | Nippon Telegr & Teleph Corp <Ntt> | Wireless base station search method and wireless base station search apparatus |
-
1990
- 1990-02-08 JP JP3010390A patent/JP2918956B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03234131A (en) | 1991-10-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |