JP2513020C - - Google Patents

Info

Publication number
JP2513020C
JP2513020C JP2513020C JP 2513020 C JP2513020 C JP 2513020C JP 2513020 C JP2513020 C JP 2513020C
Authority
JP
Japan
Prior art keywords
call
terminal
call request
base station
request
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
Application number
Other languages
Japanese (ja)
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.)
NEC Corp
Original Assignee
NEC Corp
Publication date

Links

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は無線伝送方式に関し、特に基地局からの発呼勧誘に従い移動端末が発
呼要求を行う無線伝送方式に関する。 〔従来の技術〕 一般に無線伝送システムは、第2図に示すように、各基地局B1〜B3がそれ
ぞれあるゾーンを管理し、各基地局B1〜B3の上位にはシステム全体を管理す
る集中管理局C1があるという構成になっている。また、端末である移動局M1
は第2図では基地局B1の管理ゾーン内で基地局B1と通信を行なっている。 第3図は第2図に示す無線伝送システムでの従来の無線伝送方式の一例におけ
る発呼シーケンスを示す図である。 基地局B1はその管理ゾーン内の移動局に対し発呼勧誘を行なっている。移動
局M1は、発呼したい時、基地局B1からの発呼勧誘を受けて発呼要求を送出す
る。 通常の上り電文は発呼移動局の加入者番号により特有のコード化が行なわれて
いる。しかし、発呼要求電文だけは、加入者番号がわからないとコード化された データを解読できないために、加入者番号の部分はコード化せず、それ以外のと
ころはコード化して送られてくる(第4図参照)。このため、基地局B1は、発
呼要求を受信した時、集中管理局C1へ加入者チェック等の要求として端末チェ
ック要求を行ない、集中管理局C1から端末チェックの結果、及び、発呼要求中
のコード化されている部分を復号化するためのキーをもらう(端末情報)。 基地局B1は端末情報を受け、発呼要求中のコード化されている部分を復号化
してから集中管理局C1に対し発呼要求を送る。 集中管理局C1はこの発呼要求から着呼先(相手)の加入者番号を知り、相手
との接続処理(接続要求、接続確認)を行ない、その後、発呼応答を出し、この
発呼応答は基地局B1及び移動局M1へ伝わる。 〔発明が解決しようとする課題〕 上述した従来の無線伝送方式では、基地局からの発呼勧誘により多くの端末が
発呼するため、発呼要求の衝突が起り得る。この衝突が起った時、端末は発呼要
求がシステムで受信できたか否かを知ることもできず、発呼応答を待っている。
もし発呼要求をシステムが受信できなかった時、端末は発呼応答待ちのタイムア
ウトまで待ち、タイムアウト時に発呼要求のリサイクルに入ることになり、端末
の発呼処理に時間がかかるという欠点がある。 〔課題を解決するための手段〕 本発明の無線伝送方式は、複数の端末が基地局からの発呼勧誘に従い発呼要求
元の端末である自分の識別番号情報および着呼先の端末である相手の識別番号情
報を含む発呼要求を前記基地局にて衝突の可能性をもって行ない、前記基地局は
受けつけた前記発呼要求に対する前記着呼先の端末との接続処理が完了した後に
前記発呼要求元の前記端末に発呼応答を伝える無線伝送方式において、前記端末
からの前記発呼要求が受けつけられた事を示す情報を前記発呼要求元の前記端末
に対し伝える第1の手段と、前記端末が前記第1の手段から前記情報を受信した
か否かにより自分からの発呼要求が受け付けられたか否かを判断する第2の手段
とを備えている。 〔実施例〕 次に、本発明について図面を参照して説明する。 第1図は本発明の一実施例における発呼シーケンスを示す図である。本実施例
は第2図に示す無線伝送システムに適用される。 端末である移動局M1は、発呼したい時、基地局B1からの発呼勧誘を受けて
発呼要求を送出する。 基地局B1は、移動局M1からの発呼要求を受信したとき、集中管理局C1へ
加入者チェック等の要求として端末チェック要求を行ない、集中管理局C1から
端末チェックの結果、及び、発呼要求中のコード化されている部分を復号化する
ためのキーをもらう(端末情報)。 ここで、基地局B1が移動局M1に関する端末情報を受信したということは先
に発呼した加入者である移動局M1がシステムに受付けられたことを意味する。
これにより基地局B1は該当端末である移動局M1に対し、発呼受付により、シ
ステムに受付けられた事を知らせる。基地局B1は、移動局M1から発呼受付に
対しての確認が得られたとき、集中管理局C1に対し発呼要求を送り、その後は
、第3図を用いて説明した従来の発呼シーケンスと同様な処理を行なう。 移動局M1が発呼要求を送出してから発呼受付を受信するまでの時間は発呼応
答を受信するまでの時間よりはるかに短いから、移動局M1は発呼要求がシステ
ムに受付けられたかどうかを短時間で判断できる。 〔発明の効果〕 以上説明したように本発明は、端末からの発呼要求がシステムに受けつけられ
たと判断した時該当端末に対し発呼受付を送ってその旨を伝え、端末はこの発呼
受付を受けて自分が出した発呼要求が衝突又は受信誤りなしにシステムに受付け
られたことをすぐに判断することにより、受けつけられなかった時はすぐ発呼要
求のリサイクル処理に入ることができ、端末の発呼処理の短縮化ができ、ユーザ
に対するサービス性が上がるという効果がある。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio transmission system, and more particularly to a radio transmission system in which a mobile terminal makes a call request in response to a call invitation from a base station. [Prior Art] Generally, in a radio transmission system, as shown in FIG. 2, centralized management is performed in which each base station B1 to B3 manages a certain zone, and a higher level of each base station B1 to B3 manages the entire system. The configuration is such that there is a station C1. Also, the mobile station M1 as a terminal
Communicates with the base station B1 in the management zone of the base station B1 in FIG. FIG. 3 is a diagram showing a calling sequence in an example of a conventional wireless transmission system in the wireless transmission system shown in FIG. The base station B1 is inviting a call to a mobile station in the management zone. When the mobile station M1 wishes to make a call, it receives a call invitation from the base station B1 and sends a call request. A typical uplink message is uniquely coded by the subscriber number of the calling mobile station. However, since only the call request message cannot decode the coded data without knowing the subscriber number, the subscriber number portion is not coded, and other portions are coded and sent ( (See FIG. 4). For this reason, when receiving the call request, the base station B1 issues a terminal check request to the central management station C1 as a request such as a subscriber check, etc., and the terminal check result from the central management station C1 and the call request A key for decrypting the coded part of is obtained (terminal information). The base station B1 receives the terminal information, decodes the coded part in the call request, and sends a call request to the central management station C1. The central management station C1 knows the subscriber number of the called party (the other party) from the call request, performs connection processing (connection request, connection confirmation) with the other party, and then issues a call response. Is transmitted to the base station B1 and the mobile station M1. [Problems to be Solved by the Invention] In the above-described conventional wireless transmission system, since many terminals make a call in response to a call invitation from a base station, a call request collision may occur. When this collision occurs, the terminal cannot know whether or not the call request has been received by the system, and is waiting for a call response.
If the call request is not received by the system, the terminal waits until a timeout for waiting for a call response, and when the time-out occurs, the terminal starts recycling the call request. . [Means for Solving the Problems] In the wireless transmission system of the present invention, a plurality of terminals are their own identification number information, which is a call requesting terminal according to a call invitation from a base station, and a call destination terminal. A call request including the identification number information of the other party is made by the base station with a possibility of collision, and the base station makes the call after the connection processing with the called terminal for the received call request is completed. In a wireless transmission system for transmitting a call response to the call requesting terminal, first means for transmitting information indicating that the call request from the terminal has been accepted to the terminal of the call requesting source, Second means for determining whether or not the terminal has received a call request based on whether or not the terminal has received the information from the first means. Next, the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a calling sequence in one embodiment of the present invention. This embodiment is applied to the wireless transmission system shown in FIG. When a mobile station M1 as a terminal wants to make a call, it receives a call invitation from the base station B1 and sends a call request. Upon receiving the call request from the mobile station M1, the base station B1 issues a terminal check request to the central management station C1 as a request for subscriber check and the like, and the terminal check result and the call are transmitted from the central management station C1. You will get a key to decrypt the coded part in the request (terminal information). Here, the fact that the base station B1 has received the terminal information relating to the mobile station M1 means that the mobile station M1 which is the subscriber who made the call earlier has been accepted by the system.
Thereby, the base station B1 informs the mobile station M1 as a corresponding terminal that the call has been accepted by the system. The base station B1 sends a call request to the central control station C1 when the confirmation of the call acceptance is obtained from the mobile station M1, and thereafter, the conventional call described with reference to FIG. The same processing as in the sequence is performed. Since the time from when the mobile station M1 sends a call request to when it receives a call acceptance is much shorter than the time until it receives a call response, the mobile station M1 determines whether the call request has been accepted by the system. Can be determined in a short time. [Effects of the Invention] As described above, according to the present invention, when it is determined that a call request from a terminal has been accepted by the system, a call acceptance is sent to the corresponding terminal to inform that fact, and the terminal accepts the call acceptance. By immediately determining that the call request issued by the user has been accepted by the system without collision or reception error, when the request cannot be accepted, it is possible to immediately start the call request recycling process, There is an effect that the calling process of the terminal can be shortened, and the serviceability to the user increases.

【図面の簡単な説明】 第1図は本発明の一実施例における発呼のシーケンスを示す図、第2図は本実
施例が適用される無線伝送システムの構成を示す図、第3図は従来の無線伝送方
式の一例における発呼のシーケンスを示す図、第4図は一般の無線伝送方式にお
いて端末から送られてくる発呼要求電文の内容を示す図である。 B1〜B3…基地局、C1…集中管理局、M1…移動局。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a calling sequence in one embodiment of the present invention, FIG. 2 is a diagram showing a configuration of a wireless transmission system to which the embodiment is applied, and FIG. FIG. 4 is a diagram showing a call sequence in an example of a conventional wireless transmission system, and FIG. 4 is a diagram showing the contents of a call request message sent from a terminal in a general wireless transmission system. B1 to B3: base station, C1: central management station, M1: mobile station.

Claims (1)

【特許請求の範囲】 複数の端末が基地局からの発呼勧誘に従い発呼要求元の端末である自分の識別
番号情報および着呼先の端末である相手の識別番号情報を含む発呼要求を前記基
地局にて衝突の可能性をもって行ない、前記基地局は受けつけた前記発呼要求に
対する前記着呼先の端末との接続処理が完了した後に前記発呼要求元の前記端末
に発呼応答を伝える無線伝送方式において、前記端末からの前記発呼要求が受け
つけられた事を示す情報を発呼要求元の前記端末に対し伝える第1の手段と、前
記端末が前記第1の手段から前記情報を受信したか否かにより自分からの発呼要
求が受け付けられたか否かを判断する第2の手段とを備えたことを特徴とする無
線伝送方式。
Claims: A plurality of terminals, in response to a solicitation of a call from a base station, transmit a call request including their own identification number information, which is a call requesting terminal, and identification number information of a partner, which is a called terminal. The base station performs the call with the possibility of collision, and the base station sends a call response to the terminal of the call request source after the connection processing with the called terminal for the received call request is completed. In a wireless transmission method for transmitting, first means for transmitting information indicating that the call request from the terminal has been accepted to the terminal of the call request source, and the terminal transmits the information from the first means to the terminal. And a second means for determining whether or not a call request from itself has been accepted based on whether or not a call request has been received.

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