JPH0817346B2 - Wireless packet communication system - Google Patents
Wireless packet communication systemInfo
- Publication number
- JPH0817346B2 JPH0817346B2 JP1019037A JP1903789A JPH0817346B2 JP H0817346 B2 JPH0817346 B2 JP H0817346B2 JP 1019037 A JP1019037 A JP 1019037A JP 1903789 A JP1903789 A JP 1903789A JP H0817346 B2 JPH0817346 B2 JP H0817346B2
- Authority
- JP
- Japan
- Prior art keywords
- base station
- station
- communication
- mobile station
- block
- 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 - Lifetime
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- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は無線パケット通信方式に関し、特に移動局の
ゾーン間移動の際スムーズに通信できる無線パケット通
信方式に関する。TECHNICAL FIELD The present invention relates to a wireless packet communication system, and more particularly to a wireless packet communication system that enables smooth communication when a mobile station moves between zones.
一般に無線パケット通信システムにおいては、第２図
で示されるように、各基地局Bn（ｎ＝自然数）がある一
定のゾーンを管理し、各基地局の上位には全システムを
管理する集中管理局C1があるという構成になっている。
第３図においては、情報の伝送の単位として１回の伝送
量をパケット、ｎ個のパケットが集まってブロックとい
う単位を構成するものとする。そして基地局Bnと集中管
理局C1の情報の伝送単位はブロックとする。各ブロック
中で順番が最後のパケットをラストパケットということ
にする。Generally, in a wireless packet communication system, as shown in FIG. 2, each base station Bn (n = natural number) manages a certain zone, and a centralized management station that manages the entire system above each base station. It is configured to have C1.
In FIG. 3, it is assumed that one transmission amount is a packet and n packets are a unit of a block as a unit of information transmission. The unit of transmission of information between the base station Bn and the central control station C1 is a block. The last packet in the order in each block is called the last packet.
かかる無線パケット通信システムにおける従来の無線
パケット通信方式の一例として、特願昭63−029066号明
細書に記載されているものがある。An example of a conventional wireless packet communication system in such a wireless packet communication system is described in Japanese Patent Application No. 63-029066.
第４図はこの従来例のシーケンスフローを示す図であ
る。FIG. 4 is a diagram showing a sequence flow of this conventional example.
第４図において、M1は移動局、B1,B2は基地局、C1は
集中管理局である。今、移動局M1は基地局B1のゾーンか
ら基地局B2のゾーンに移動しながら基地局B1と通信をし
ていて、第ｍブロックのｎ−１パケットまで送信終了し
た時に、移動局M1が基地局B2のゾーンに移り基地局B1か
らの信号が受けられなくなったとする。この時移動局M1
は基地局B2に対して再発呼要求をする。これを受けた基
地局B2は集中管理局C1に移動局M1が再発呼要求を出して
来た事を知らせる。集中管理局C1は再発呼要求という事
から、その前まで他の基地局B1と移動局M1が通信をして
いたことを知る。このとき、集中管理局C1は前通信基地
局B1に対し移動局M1とどこまで（第何番ブロックまで）
通信をしていたかを聞くと同時に、基地局B1と移動局M1
の通信を切るように指示する（再発呼指示）。基地局B1
は再発呼指示を受けると、基地局B1と移動局M1の通信内
容を集中管理局C1に教え（前通信情報）移動局M1との通
信をアイドル（Idle）状態にする。集中管理局C1は基地
局B1より前通信情報を受けると、基地局B2に次はどのブ
ロックから受信すべきかの情報を含んだ再発呼応答を伝
える。基地局B2は集中管理局C1からの再発呼応答をうけ
ると移動局M1にどのブロックから送信すべきかという項
を含んだ再発呼応答を送り、再発呼処理を終了する。移
動局M1は再発呼応答を受けると、その中に示されている
ブロックからの送信を行なう。In FIG. 4, M1 is a mobile station, B1 and B2 are base stations, and C1 is a central control station. Now, the mobile station M1 is communicating with the base station B1 while moving from the zone of the base station B1 to the zone of the base station B2, and when the transmission of up to the n−1th packet of the m-th block is completed, the mobile station M1 becomes the base station. It is assumed that the station B2 has moved to the zone and the signal from the base station B1 cannot be received. At this time, mobile station M1
Requests the base station B2 to call again. Receiving this, the base station B2 informs the central control station C1 that the mobile station M1 has issued a re-call request. The centralized control station C1 knows that the other base station B1 and the mobile station M1 have been communicating with each other from the fact that the call is requested again. At this time, the central management station C1 and the mobile station M1 to the previous communication base station B1 and to what extent (to what block number)
At the same time asking if you were communicating, base station B1 and mobile station M1
Instruct to disconnect the communication of (call recall instruction). Base station B1
When receiving the re-call instruction, the centralized control station C1 is informed of the communication contents of the base station B1 and the mobile station M1 (previous communication information), and the communication with the mobile station M1 is set to the idle state. Upon receiving the previous communication information from the base station B1, the centralized control station C1 sends a recalling response including information about which block should be received next to the base station B2. Upon receiving the recalling response from the centralized control station C1, the base station B2 sends a recalling response including a term from which block to transmit to the mobile station M1, and terminates the recalling process. When the mobile station M1 receives the recalling response, the mobile station M1 transmits from the block shown therein.
上述した従来の無線パケット通信方式において、集中
管理局C1が基地局B2に伝える再発呼応答のための情報
は、前通信基地局B1から通知される前通信情報のみであ
る。そのため、移動局M1から前通信基地局B1に対してパ
ケットが送られていた場合のゾーン間移動では、受信デ
ータのブロック管理を前通信基地局B1で行なっているた
めデータ抜け又は重複の問題は起らないが、前通信基地
局B1から移動局M1に対してパケットが送られていた場合
のゾーン間移動では、集中管理局C1は移動局M1がどのブ
ロックまで受信完了しているのか特定することが出来な
い。これは、前通信基地局B1からの前通信情報のみで集
中管理局C1は判断を行なうためで、この判断は実際に移
動局M1が受信完了しているブロックと必ずしも一致しな
いからである。In the above-described conventional wireless packet communication system, the central control station C1 notifies the base station B2 of the information for the recalling call only the previous communication information notified from the previous communication base station B1. Therefore, in the inter-zone movement when a packet is sent from the mobile station M1 to the previous communication base station B1, there is no problem of data loss or duplication because the previous communication base station B1 performs block management of received data. Although it does not occur, the central control station C1 identifies to which block the mobile station M1 has completed reception when moving between zones when a packet is sent from the previous communication base station B1 to the mobile station M1. I can't. This is because the centralized management station C1 makes a judgment only based on the previous communication information from the previous communication base station B1, and this judgment does not necessarily match the block that the mobile station M1 has actually completed receiving.
例えば、前通信基地局B1から移動局M1に対してｍブロ
ック目のラストパケットが送られた直後にゾーン間移動
が起こり、移動局M1より再発呼要求が送出されると、集
中管理局C1は、移動局M1がｍブロック目のラストパケッ
トを受信完了したのか否かを知る手段がないため、実際
に移動局M1がｍブロック目のラストパケットを受信完了
していたとしても前通信基地局B1からの前通信情報より
ｍブロック目の受信完了の確認が行なわれてないと判断
し、再び同じブロック（ｍブロック）を送信するよう基
地局B2に対して再発呼応答を送ることになる。For example, when the inter-zone move occurs immediately after the last packet of the m-th block is sent from the previous communication base station B1 to the mobile station M1, and the re-call request is sent from the mobile station M1, the central control station C1 Since there is no means for the mobile station M1 to know whether or not the m-th block last packet has been received, even if the mobile station M1 has actually received the m-th block last packet, the previous communication base station B1 It is determined from the previous communication information that the reception completion of the m-th block has not been confirmed, and a recalling response is sent to the base station B2 to transmit the same block (m-block) again.
そのため、移動局M1は重複したブロックを受信するこ
ととなり、回線の効率が低下するとともに、重複したブ
ロックを受信するとことなり、回線の効率が低下すると
ともに、重複したブロックを受信したことを検出する処
理及びその時のデータの処理方法等で大変複雑な処理が
発生するという欠点がある。Therefore, the mobile station M1 receives the duplicated block, which reduces the line efficiency and also receives the duplicated block, which reduces the line efficiency and detects that the duplicated block is received. There is a drawback in that very complicated processing occurs due to processing and data processing method at that time.
本発明によれば、集中管理局と、割り当てられた各サ
ービスゾーンを管理する複数の基地局と、前記各サービ
スゾーンを移動する移動局とを有し、基地局を通し通信
をする無線パケット通信方式において、通信中の移動局
が第１の基地局のサービスゾーンから第２の基地局のサ
ービスゾーンに移動した場合、第２の基地局に第１の基
地局との通信内容の情報を含む再発呼要求を送信する第
１の手段と、通信する順序指示をうける第２の手段と、
指示を受けた時に指示された順番のパケットを通信する
第３の手段とを有する移動局と；集中管理局から第１の
基地局と通信をしていた移動局が第２の基地局と通信す
る要求がある事を知る第４の手段と、要求を知ったとき
移動局と通信していた内容を集中管理局へ伝える第５の
手段と、集中管理局から第１の基地局が通信していた通
信内容を受ける第６の手段と、通信内容を受けた時該当
する移動局に通信内容を送る第７の手段とを有する基地
局と；今まで通信していた移動局が第２の基地局へ再発
呼要求を出した事を第２の基地局から知る第８の手段
と、再発呼要求を知ったとき今まで通信していた第１の
基地局に対し移動局との通信内容をたずねる第９の手段
と、通信内容を第１の基地局から受ける第10の手段と、
第２の基地局に通信内容を教える手段とを有する集中管
理局とで構成されることを特徴とするパケット通信方式
が得られる。According to the present invention, a wireless packet communication having a centralized management station, a plurality of base stations managing each assigned service zone, and a mobile station moving in each service zone, and performing communication through the base station In the method, when the mobile station in communication moves from the service zone of the first base station to the service zone of the second base station, the second base station includes information on the content of communication with the first base station. A first means for transmitting a recall request and a second means for receiving a communication order instruction;
A mobile station having a third means for communicating packets in the order instructed when the instruction is received; a mobile station communicating with the first base station from the central control station communicates with the second base station There is a request to do so, a fifth means for notifying the central management station of the contents that were communicating with the mobile station when the request was known, and a first base station communicating from the central management station. A base station having a sixth means for receiving the communication content, and a seventh means for sending the communication content to the corresponding mobile station when the communication content is received; Eighth means for knowing from the second base station that a recall request has been issued to the base station, and communication contents with the mobile station for the first base station that had been communicating until when the recall call request was known. And a tenth means for receiving communication contents from the first base station,
A packet communication system characterized by being configured with a central control station having means for teaching the communication contents to the second base station is obtained.
〔実施例〕 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図は本発明の無線パケット通信方式の一実施例の
シーケンスフローを示す図である。FIG. 1 is a diagram showing a sequence flow of an embodiment of a wireless packet communication system of the present invention.
第１図において、M1は移動局、B1,B2は基地局、C1は
集中管理局である。今、基地局B1は基地局B1のゾーンか
ら基地局B2のゾーンに移動している移動局M1と通信をし
ていて、第ｍブロックのラストパケットまで送信終了し
た時に移動局M1が基地局B2のゾーンに移り、移動局M1で
基地局B1からの信号が受けられなくなったとする。この
時移動局M1は、第ｍブロックのラストパケットまで受信
完了している場合、基地局B2に対して第ｍ＋１ブロック
を指定した再発呼要求をする。又、第ｍブロックのラス
トパケットまで受信完了していない場合、基地局B2に対
して第ｍブロックを指定した再発呼要求をする。第１図
では前者の場合について図示した。これを受けた基地局
B2は集中管理局C1に移動局M1が再発呼要求を出して来た
事をその内容と共に知らせる。集中管理局C1は再発呼要
求という事から、その前まで他の基地局B1と移動局M1が
通信をしていたことを知る。このとき、集中管理局C1は
前通信基地局B1に対し移動局M1とどこまで（第何番ブロ
ックまで）通信をしていたかを聞くと同時に、基地局B1
と移動局M1の通信を切るように指示する（再発呼指
示）。基地局B1は再発呼指示を受けると、基地局B1と移
動局M1の通信内容を集中管理局C1に教え（前通信情報）
移動局M1との通信をアイドル（Idle）状態にする。集中
管理局C1は基地局B1より前通信情報を受けると、移動局
M1からの再発呼要求中のブロックの指定と前通信情報と
をもとにして基地局B2に次はどのブロックから送信すべ
きかの情報を含んだ再発呼応答を伝える。基地局B2は集
中管理局C1からの再発呼応答をうけると移動局M1にどの
ブロックから受信すべきかという項を含んだ再発呼応答
を送り、再発呼処理を終了する。基地局B2は再発呼応答
を送出すると、その中に示されているブロックからの送
信を行なう。In FIG. 1, M1 is a mobile station, B1 and B2 are base stations, and C1 is a central control station. Now, the base station B1 is in communication with the mobile station M1 which is moving from the zone of the base station B1 to the zone of the base station B2, and when the transmission of the last packet of the m-th block is completed, the mobile station M1 receives the base station B2. It is assumed that the mobile station M1 cannot receive the signal from the base station B1. At this time, when the mobile station M1 has completed reception of the last packet of the m-th block, it requests the base station B2 for a recalling call designating the (m + 1) th block. If the reception of the last packet of the m-th block has not been completed, a re-calling request designating the m-th block is issued to the base station B2. FIG. 1 illustrates the former case. Base station receiving this
B2 informs the central control station C1 that the mobile station M1 has issued a recall request together with its content. The centralized control station C1 knows that the other base station B1 and the mobile station M1 have been communicating with each other from the fact that the call is requested again. At this time, the central control station C1 asks the previous communication base station B1 how far (up to what block) the mobile station M1 was communicating with, and at the same time, the base station B1
And the mobile station M1 to disconnect communication (recall instruction). When the base station B1 receives the recalling instruction, it informs the central management station C1 of the communication contents between the base station B1 and the mobile station M1 (previous communication information).
The communication with the mobile station M1 is set to the idle state. When the central control station C1 receives the previous communication information from the base station B1, the mobile station
Based on the designation of the block in the recall request from M1 and the previous communication information, a recall call response including information of which block should be transmitted next is transmitted to the base station B2. Upon receiving the recalling response from the centralized control station C1, the base station B2 sends the recalling response including the item from which block to receive to the mobile station M1, and terminates the recalling process. When the base station B2 sends the recalling response, the base station B2 transmits from the block shown therein.
以上説明したように本発明は、移動局が第１の基地局
のサービスゾーンから第２の基地局のサービスゾーンへ
移動する場合、移動局から第２の基地局に第１の基地局
との通信内容を含んだ再発呼要求を送り第２の基地局か
ら集中管理局へその事を伝える。集中管理局は今まで通
信をしていた第１の基地局との間で通信の切断を指示す
るとともに通信の送信情報をうける。そして、集中管理
局はその情報を受けて第２の基地局へ送信情報を教える
と共に、第２の基地局が移動局にその事を伝える。As described above, according to the present invention, when the mobile station moves from the service zone of the first base station to the service zone of the second base station, the mobile station transfers the first base station to the second base station. A re-call request including communication contents is sent and the second base station notifies the central control station of the fact. The central control station instructs the disconnection of the communication with the first base station which has been communicating until now and receives the transmission information of the communication. Then, the central control station receives the information and gives the transmission information to the second base station, and at the same time, the second base station notifies the mobile station of the fact.
以上説明したように本発明によれば、無線パケットデ
ータ通信において、ゾーン間移動をした時にスムーズに
基地局の間と通信が再開できると共に、集中管理局にお
いて移動局からの前に通信していた基地局との通信情報
と前に通信していた基地局の送信情報とにより既に終了
しているブロックを知り、次のブロックからの処理を行
なうことができる。その結果、データ受信中の移動局の
ゾーン間移動の際にも受信データの重複が起こらず、回
線の効率も上がるという効果がある。As described above, according to the present invention, in wireless packet data communication, communication between base stations can be smoothly resumed when moving between zones, and communication is performed before a mobile station in a centralized management station. It is possible to know the already completed block by the communication information with the base station and the transmission information of the previously communicated base station, and perform the process from the next block. As a result, there is an effect that the duplication of received data does not occur even when the mobile station moves between zones while receiving data, and the efficiency of the line is improved.
第１図は本発明の無線パケット通信方式の一実施例のシ
ーケンスフローを示す図、第２図は一般の無線パケット
通信システムの構成を示す図、第３図は同じく伝送単位
の構成を示す図、第４図は従来の無線パケット通信方式
の一例のシーケンスフローを示す図である。 M1……移動局、B1,B2……基地局、C1……集中管理局。FIG. 1 is a diagram showing a sequence flow of an embodiment of a wireless packet communication system of the present invention, FIG. 2 is a diagram showing a configuration of a general wireless packet communication system, and FIG. 3 is a diagram showing a configuration of a transmission unit. FIG. 4 is a diagram showing a sequence flow of an example of a conventional wireless packet communication system. M1 ... Mobile station, B1, B2 ... Base station, C1 ... Centralized control station.
Claims (1)
ゾーンを管理する複数の基地局と、前記各サービスゾー
ンを移動する移動局とを有し、前記基地局を通し通信を
する無線パケット通信方式において、 通信中の前記移動局が第１の基地局のサービスゾーンか
ら第２の基地局のサービスゾーンに移動した場合、前記
第２の基地局に前記第１の基地局との通信内容の情報を
含む再発呼要求を送信する第１の手段と、通信する順序
指示をうける第２の手段と、前記指示を受けた時に指示
された順番のパケットを通信する第３の手段とを有する
前記移動局と； 前記集中管理局から前記第１の基地局と通信をしていた
前記移動局が前記第２の基地局と通信する要求がある事
を知る第４の手段と、前記要求を知ったとき前記移動局
と通信していた内容を前記集中管理局へ伝える第５の手
段と、前記集中管理局から前記第１の基地局が通信して
いた通信内容を受ける第６の手段と、前記通信内容を受
けた時該当する前記移動局に前記通信内容を送る第７の
手段とを有する前記基地局と； 今まで通信していた前記移動局が前記第２の基地局へ前
記再発呼要求を出した事を前記第２の基地局から知る第
８の手段と、前記再発呼要求を知ったとき今まで通信し
ていた前記第１の基地局に対し前記移動局との前記通信
内容をたずねる第９の手段と、前記通信内容を前記第１
の基地局から受ける第10の手段と、前記第２の基地局に
前記通信内容を教える手段とを有する前記集中管理局と
で構成されることを特徴とする無線パケット通信方式。1. A wireless packet communication having a centralized management station, a plurality of base stations managing each assigned service zone, and a mobile station moving in each service zone, and performing communication through the base station. In the method, when the mobile station in communication moves from the service zone of the first base station to the service zone of the second base station, the second base station is notified of the contents of communication with the first base station. And a third means for communicating a packet in the order instructed when the instruction is received. A mobile station; fourth means for knowing that the mobile station, which has been in communication with the first base station from the centralized management station, has a request for communication with the second base station, and knows the request. While communicating with the mobile station To the centralized management station, a sixth means for receiving the communication content from the centralized management station with which the first base station was communicating, and the move corresponding when the communication content is received. A base station having a seventh means for sending the communication content to a station; the second base station informing that the mobile station, which has been in communication until now, has issued the recalling request to the second base station. 8th means to know from the station, 9th means to inquire the communication contents with the mobile station to the 1st base station that has been communicating until when the recall request was known, and the communication contents The first
Wireless packet communication system comprising: a central management station having a tenth means for receiving from the base station and a means for teaching the communication contents to the second base station.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1019037A JPH0817346B2 (en) | 1989-01-26 | 1989-01-26 | Wireless packet communication system |
| EP89102236A EP0328100B1 (en) | 1988-02-10 | 1989-02-09 | High throughput communication method and system for a digital mobile station when crossing a zone boundary during a session |
| CA000590551A CA1301845C (en) | 1988-02-10 | 1989-02-09 | High throughput communication method and system for a digital mobile station when crossing a zone boundary during a session |
| US07/308,276 US4989204A (en) | 1988-02-10 | 1989-02-09 | High throughput communication method and system for a digital mobile station when crossing a zone boundary during a session |
| DE68923102T DE68923102T2 (en) | 1988-02-10 | 1989-02-09 | High throughput communication method and system for a digital mobile station crossing a zone boundary during a connection. |
| AU29855/89A AU616858B2 (en) | 1988-02-10 | 1989-02-10 | High throughout communication method and system for a digital mobile station when crossing a zone boundary during a session |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1019037A JPH0817346B2 (en) | 1989-01-26 | 1989-01-26 | Wireless packet communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02198229A JPH02198229A (en) | 1990-08-06 |
| JPH0817346B2 true JPH0817346B2 (en) | 1996-02-21 |
Family
ID=11988239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1019037A Expired - Lifetime JPH0817346B2 (en) | 1988-02-10 | 1989-01-26 | Wireless packet communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0817346B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2621546B2 (en) * | 1990-02-23 | 1997-06-18 | 日本電気株式会社 | Wireless packet communication method and wireless packet communication system |
| US5212806A (en) * | 1990-10-29 | 1993-05-18 | International Business Machines Corporation | Distributed control methods for management of migrating data stations in a wireless communications network |
-
1989
- 1989-01-26 JP JP1019037A patent/JPH0817346B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02198229A (en) | 1990-08-06 |
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