JPH0455036B2 - - Google Patents
Info
- Publication number
- JPH0455036B2 JPH0455036B2 JP19916783A JP19916783A JPH0455036B2 JP H0455036 B2 JPH0455036 B2 JP H0455036B2 JP 19916783 A JP19916783 A JP 19916783A JP 19916783 A JP19916783 A JP 19916783A JP H0455036 B2 JPH0455036 B2 JP H0455036B2
- Authority
- JP
- Japan
- Prior art keywords
- time slot
- time
- exchange
- communication path
- communication
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000015654 memory Effects 0.000 description 11
- 230000006870 function Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/427—Loop networks with decentralised control
- H04L12/43—Loop networks with decentralised control with synchronous transmission, e.g. time division multiplex [TDM], slotted rings
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明は、一定の時間で区切られた複数のタイ
ムスロツトを持つ時分割多重伝送路をループ状に
配し、ループ上に複数の回線交換機を置いた時分
割ループ交換網において、通信路を設定するに当
り、タイムスロツトを各通信毎にダイナミツクに
割付ける時分割ループ交換機のタイムスロツト割
付方式に関するものである。[Detailed Description of the Invention] (Technical Field) The present invention is based on a method in which a time division multiplex transmission line having a plurality of time slots separated by a fixed time is arranged in a loop, and a plurality of circuit exchangers are placed on the loop. This invention relates to a time slot allocation method for a time division loop switching system that dynamically allocates a time slot for each communication when setting up a communication path in a time division loop switching network.
（従来技術）
従来、時分割ループ回線交換網では、複数の交
換機うち、タイムスロツトを割付ける機能を持
つ、ただ一つのマスタ交換機と、タイムスロツト
割付機能を持たないその他のスレーブ交換機とか
ら構成されている。発信側スレーブ交換機は、通
信の開始に先立つて通信相手交換機との間に通信
路を設定するために、マスタ交換機にタイムスロ
ツトの割付を依頼し、マスタ交換機は複数のタイ
ムスロツトの中から空タイムスロツトを選択し、
スレーブ交換機に報告するとともに、該当タイム
スロツトを使用中とする。スレーブ交換機は、こ
のタイムスロツトを用いて相手交換機との間に、
通信路を設定し、通信を開始する。又、通信終了
時、スレーブ交換機は該当タイムスロツトの使用
終了をマスタ交換機に知らせ、通信路を開放す
る。この時マスタ交換機は該当タイムスロツトを
使用中から空きとする。(Prior art) Traditionally, a time-division loop circuit switching network consists of a single master switch among multiple switches that has a time slot allocation function, and other slave switches that do not have a time slot allocation function. ing. Prior to starting communication, the originating slave exchange requests the master exchange to allocate time slots in order to establish a communication path with the communicating party exchange, and the master exchange selects an empty time slot from among multiple time slots. Select the lot,
This is reported to the slave exchange and the corresponding time slot is set to be in use. The slave exchange uses this time slot to communicate with the other exchange.
Set up a communication path and start communication. Furthermore, when the communication ends, the slave exchange notifies the master exchange that the use of the corresponding time slot has ended and opens the communication path. At this time, the master exchange changes the corresponding time slot from being used to vacant.
この様にしてタイムスロツトの割付機能をマス
タ交換機に集中しているため、スレーブ交換機数
の拡大時、マスタ交換機の処理能力の問題点、
又、マスタ交換機の障害はループ網全体の障害に
なる事から信頼性の問題等の欠点があつた。 In this way, the time slot allocation function is concentrated on the master exchange, so when the number of slave exchanges is expanded, problems with the processing capacity of the master exchange,
Furthermore, since a failure in the master switch causes a failure in the entire loop network, there are drawbacks such as reliability problems.
（発明の目的）
本発明は、これらの欠点を解決するため、タイ
ムスロツトの割付機能をマスタ交換機に集中せ
ず、ループ網上の全ての交換機にタイムスロツト
割付機能を持たせることを特徴とし、その目的
は、タイムスロツト割付処理の集中化による処理
能力上の問題の解決及びループ網全体の信頼性の
向上を計るものである。以下詳細に説明する。(Object of the Invention) In order to solve these drawbacks, the present invention is characterized in that the time slot allocation function is not concentrated in the master exchange, but all exchanges on the loop network are provided with the time slot allocation function. The purpose of this is to solve processing capacity problems by centralizing time slot allocation processing and to improve the reliability of the entire loop network. This will be explained in detail below.
（本発明の構成）
本発明の構成は、一定の時間で区切られたＮ個
のタイムスロツトを持つ時分割多重伝送路をルー
プ状に配し、ループ上の任意の位置にＭ個の回線
交換機を置いた時分割ループ回線交換機におい
て、各々の交換機は通信の開始に先だつて通信相
手交換機との間で１個の空きタイムスロツトを選
択し、通信路を設定する手段及び通信終了後通信
路を開放する手段を有し、Ｎ個のタイムスロツト
をＭ個のタイムスロツト群Ｎ１，Ｎ２，…，NM
に分割し、タイムスロツト群のそれぞれを各交換
機の制御下に置き、各交換機は制御下に置かれた
タイムスロツト群の範囲内からのみ空きタイムス
ロツトを選択し、かつ通信路の設定及び開放手段
を有し、空きタイムスロツトの選択は優先的に発
信側交換機が行ない、発信側交換機に空きタイム
スロツトがない場合は着信側交換機が空きタイム
スロツトの選択を行ない、通信路を設定し、通信
路の開放は両者の場合とも空きタイムスロツトを
選択した側の交換機が行なうことを特徴とする時
分割ループ回線交換機のタイムスロツト割付方式
である。(Configuration of the present invention) The configuration of the present invention is such that a time division multiplex transmission line having N time slots separated by a fixed time is arranged in a loop, and M line switches are installed at arbitrary positions on the loop. In a time-division loop circuit switch installed in a time-division loop switch, each switch selects one free time slot with the communicating party's switch before starting communication, and has a means for setting up a communication path and a means for establishing a communication path after communication ends. means for opening the N time slots into M time slot groups N1, N2,..., N M
Each time slot group is placed under the control of each exchange, and each exchange selects an empty time slot only from within the range of the time slot group placed under its control, and has means for setting and opening a communication path. The originating exchange selects an empty time slot with priority, and if the originating exchange does not have an empty time slot, the terminating exchange selects an empty time slot, sets up a communication path, and sets the communication path. This is a time slot allocation method of a time division loop line exchange characterized in that, in both cases, the open time slot is released by the exchange on the side that has selected the vacant time slot.
（実施例）
第１図は本発明の実施例の説明図である。同図
において、１０，２０，３０，４０は時分割回線
交換機であり、時分割回線交換機１０と２０，２
０と３０，４０と４０，４０と１０は一定の時間
で区切られたＮ個のタイムスロツトを持つ時分割
多重伝送路５０により接続され、時分割回線交換
機１０，２０，３０，４０はそれぞれ、自交換機
が管理するタイムスロツト数N1，N2，N3，N4
個のタイムスロツト管理メモリ１１，２１，３
１，４１を持つている。該タイムスロツト管理メ
モリ１１，２１，３１，４１は、各タイムスロツ
トの使用中、空きを記憶しておくものである。(Example) FIG. 1 is an explanatory diagram of an example of the present invention. In the figure, 10, 20, 30, 40 are time division line exchanges, and time division line exchanges 10, 20, 2
0 and 30, 40 and 40, and 40 and 10 are connected by a time division multiplex transmission line 50 having N time slots separated by a fixed time, and the time division line exchangers 10, 20, 30, and 40 are connected by Number of time slots managed by own exchange N1, N2, N3, N4
time slot management memory 11, 21, 3
It has 1,41. The time slot management memories 11, 21, 31, and 41 are used to store the availability of each time slot while it is in use.
ここで、Ｎ＝N1＋N2＋N3＋N4の関係があ
る。 Here, there is a relationship of N=N1+N2+N3+N4.
N1i，N2jはタイムスロツト管理メモリ１１，
２１の中のｉ，ｊ番目のタイムスロツト番号を表
わす。 N1i and N2j are time slot management memory 11,
represents the i and j-th time slot numbers in 21.
時分割回線交換機１０が時分割回線交換機２０
と通信を開始する場合、発信側時分割回線交換機
１０はタイムスロツト管理メモリ１１の中から空
きタイムスロツト番号N1iを選択し、N1iを時分
割回線交換機２０に送り、タイムスロツト管理メ
モリ１１の中のSN1iのメモリを使用中にし、通
信路を設定し、通信を開始する。 The time division line exchange 10 is the time division line exchange 20.
When starting communication with the time-division line exchange 10, the originating side time-division line exchange 10 selects an empty time slot number N1i from the time-slot management memory 11, sends N1i to the time-division line exchange 20, and selects an empty time slot number N1i from the time slot management memory 11. Make the SN1i's memory in use, set up the communication path, and start communication.
又、この場合、時分割回線交換機１０の持つタ
イムスロツト管理メモリ１１が全て使用中の場合
は、時分割回線交換機１０は時分割回線交換機２
０に空タイムスロツト選択を依頼する。依頼され
た時分割線交換機２０は、タイムスロツト管理メ
モリ２１の中から空タイムスロツト番号N2jを選
択し、タイムスロツト管理メモリ２１の中のN2j
のメモリを使用中にし、N2jを時分割回線交換機
１０に報告し、かつ通信路を設定し、通信を開始
する。 Further, in this case, if all the time slot management memories 11 of the time division line exchange 10 are in use, the time division line exchange 10 is used by the time division line exchange 2.
0 to select an empty time slot. The requested time division line switch 20 selects an empty time slot number N2j from the time slot management memory 21, and selects the vacant time slot number N2j from the time slot management memory 21.
memory is in use, reports N2j to the time-division line exchange 10, sets up a communication path, and starts communication.
通信路の開放は、時分割回線交換機１０，２０
いずれが通信終了を要求する場合も、通信路に用
いられているタイムスロツト選択した側、この場
合時分割回線交換機１０又は２０に通信路の開放
を知らせると、時分割回線交換機１０の場合は
N1iを、時分割回線交換機２０の場合はN2jを空
きとし、通信路の開放を行なう。 The communication channel is opened by the time division circuit exchangers 10 and 20.
When either party requests termination of communication, the side that selected the time slot used for the communication channel, in this case time division circuit switch 10 or 20, is notified of the opening of the communication channel.
In the case of the time-division line exchange 20, N2j is left vacant to open the communication path.
以上説明したように、この実施例では通信路設
定のためのタイムスロツト選択割付機能は、通信
の発信側又は着信側のいづれかであるため、ルー
プ上の一つの回線交換機にタイムスロツト選択割
付機能が集中することはなく各回線交換機の通信
量に応じて分散される。これにより、ある特定の
回線交換機に対する負荷集の中により、網全体の
通信能力が低下する事なく、又、タイムスロツト
割付機能が分散していることから、交換機の障害
に対する危険が分散化され、網全体の信頼性の向
上になる等の利点がある。 As explained above, in this embodiment, the time slot selection and allocation function for setting the communication path is performed on either the originating side or the receiving side of the communication, so the time slot selection and allocation function is installed in one line exchange on the loop. It is not concentrated, but is distributed according to the traffic of each line exchange. As a result, the communication capacity of the entire network will not be reduced due to the concentration of load on a particular line switch, and since the time slot allocation function is distributed, the risk of switch failures is decentralized. This has advantages such as improving the reliability of the entire network.
（発明の効果）
本発明は、時分割ループ交換網上に置かれた各
回線交換機が、自交換機の関与する通信に対して
通信路の設定・開放のためのタイムスロツトの割
付及び管理を自身で行なうことから、負荷の分散
化及び障害に対する危険が分散化される等の利点
がある。従つて小規模、低処理能力の回線交換機
により、信頼性の高い、負荷分散型の時分割ルー
プ回線交換網を構築するのに有効である。(Effects of the Invention) The present invention allows each circuit switch installed on a time-division loop switching network to allocate and manage time slots for establishing and opening communication channels for communications involving its own switch. Since this is carried out in a single unit, there are advantages such as the distribution of load and the distribution of risk of failure. Therefore, it is effective for constructing a highly reliable, load-distributing, time-division loop circuit switching network using small-scale, low-throughput circuit switching equipment.
第１図は本発明の実施例の説明図である。
１０，２０，３０，４０…回線交換機、５０…
時分割多重伝送路、１１，２１，３１，４１…タ
イムスロツト管理メモリ。
FIG. 1 is an explanatory diagram of an embodiment of the present invention. 10, 20, 30, 40... line exchange, 50...
Time division multiplex transmission line, 11, 21, 31, 41... time slot management memory.
Claims (1)
トを持つ時分割多重伝送路をループ状に配し、ル
ープ上の任意の位置にＭ個の回線交換機を置いた
時分割ループ回線交換機において、 各々の交換機は通信の開始に先だつて通信相手
交換機との間で１個の空きタイムスロツトを選択
し、通信路を設定する手段及び通信終了後通信路
を開放する手段を有し、 Ｎ個のタイムスロツトをＭ個のタイムスロツト
群Ｎ１，Ｎ２，…NMに分割し、タイムスロツト
群のそれぞれを各交換機の制御下に置き、 各交換機は制御下に置かれたタイムスロツト群
の範囲内からのみ空きタイムスロツトを選択し、
かつ通信路の設定及び開放手段を有し、 空きタイムスロツトの選択は優先的に発信側交
換機が行ない、発信側交換機に空きタイムスロツ
トがない場合は着信側交換機が空きタイムスロツ
トの選択を行ない、通信路を設定し、 通信路の開放は両者の場合とも空きタイムスロ
ツトを選択した側の交換機が行なうことを特徴と
する時分割ループ回線交換機のタイムスロツト割
付方式。[Claims] 1. A time division multiplex transmission line in which a time division multiplex transmission line having N time slots separated by a fixed time is arranged in a loop, and M line switches are placed at arbitrary positions on the loop. In a loop circuit switch, each switch has means for selecting one free time slot with the communication partner switch before starting communication, and means for setting up a communication path, and means for releasing the communication path after communication ends. Then, the N time slots are divided into M time slot groups N1, N2, . Select only free time slots from within the group,
and has means for setting and opening a communication path, the originating exchange selects an empty time slot with priority, and if the originating exchange does not have an empty time slot, the terminating exchange selects an empty time slot, A time slot allocation method for a time division loop line exchange, characterized in that a communication path is set and the communication path is opened by the exchange on the side that has selected an empty time slot in both cases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19916783A JPS6091797A (en) | 1983-10-26 | 1983-10-26 | Time slot assigning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19916783A JPS6091797A (en) | 1983-10-26 | 1983-10-26 | Time slot assigning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6091797A JPS6091797A (en) | 1985-05-23 |
| JPH0455036B2 true JPH0455036B2 (en) | 1992-09-02 |
Family
ID=16403268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19916783A Granted JPS6091797A (en) | 1983-10-26 | 1983-10-26 | Time slot assigning system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6091797A (en) |
-
1983
- 1983-10-26 JP JP19916783A patent/JPS6091797A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6091797A (en) | 1985-05-23 |
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