JPH0273746A - Packet transmission system - Google Patents
Packet transmission systemInfo
- Publication number
- JPH0273746A JPH0273746A JP63224535A JP22453588A JPH0273746A JP H0273746 A JPH0273746 A JP H0273746A JP 63224535 A JP63224535 A JP 63224535A JP 22453588 A JP22453588 A JP 22453588A JP H0273746 A JPH0273746 A JP H0273746A
- Authority
- JP
- Japan
- Prior art keywords
- packet
- channel
- reception interval
- response
- apd
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- ZJULYDCRWUEPTK-UHFFFAOYSA-N dichloromethyl Chemical compound Cl[CH]Cl ZJULYDCRWUEPTK-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 102100034665 Clathrin heavy chain 2 Human genes 0.000 description 1
- 101000946482 Homo sapiens Clathrin heavy chain 2 Proteins 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ロジカルチャネルを介するパケット交換網を
用い、パケット形式によりデータの伝送を行なうパケッ
ト伝送方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a packet transmission method for transmitting data in packet format using a packet switching network via logical channels.
パケット伝送においては、パケット交換網にょシ論理的
に伝送回線と等価なロジカルチャネルを構成し、これを
介してパケット形式のデータ伝送を行なっておシ、現用
中のロジカルチャネルに障害を生じた場合には、伝送を
行なう端末装置よシ、新たなロジカルチャネルの接続を
要求するものとなっている。In packet transmission, a logical channel logically equivalent to a transmission line is configured in a packet switching network, and data is transmitted in packet format via this.If a failure occurs in the logical channel currently in use, In this case, the terminal device that performs the transmission is required to connect a new logical channel.
しかし、従来においては、障害の検出を第３レベルのパ
ケット交換プロトコルにより行なっておυ、これの再送
時間監視用タイマーにょシ障害を検出するまでの時間が
長いと共に、障害検出に応じて新たにロジカルチャネル
を設定しているため、障害発生から回復までの所要時間
が大となる欠点を生じている。However, in the past, failures were detected using a third-level packet switching protocol, which required a timer for monitoring retransmission time. Since a logical channel is set, the disadvantage is that the time required from the occurrence of a failure to recovery is long.
前述の課題を解決するため、本発明はっぎの手ＩＲＫよ
シ構成するものと々つている。In order to solve the above-mentioned problems, the present invention is comprised of a first hand IRK.
すなわち、上述のパケット伝送方式において、複数のロ
ジカルチャネルをあらかじめ定めておき、各ロジカルチ
ャネル中のいずれか一つを用いてパケットの伝送を行な
うと共に、送信側から一定周期により監視パケットを送
信し、受信側においては監視パケットの受信に応じて応
答パケットを返信し、この応答パケットの受信間隔を送
信側において監視し、受信間隔が所定時間を越えたとき
各ロジカルチャネル中の他のロジカルチャネルを用いる
ものとしている。That is, in the above-mentioned packet transmission method, a plurality of logical channels are determined in advance, a packet is transmitted using one of the logical channels, and a monitoring packet is transmitted from the transmitting side at a fixed period, The receiving side returns a response packet in response to the reception of the monitoring packet, the transmitting side monitors the reception interval of this response packet, and uses another logical channel among each logical channel when the reception interval exceeds a predetermined time. I take it as a thing.
したがって、応答パケットの受信間隔により現用ロジカ
ルチャネルの障害が直ちに検出できると共に、あらかじ
め複数のロジカルチャネルが用意されているため、他の
ロジカルチャネルへの切替が即時に行なえる。Therefore, a failure in the currently used logical channel can be detected immediately based on the reception interval of response packets, and since a plurality of logical channels are prepared in advance, switching to another logical channel can be performed immediately.
以下、実施例を示す機能的なブロック図によって本発明
の詳細な説明する。The present invention will now be described in detail with reference to functional block diagrams illustrating embodiments.
同図においては、送信側端末装置（以下、５ＴＥ）１、
および、受信側端末装置（以下、ＲＴＥ）２が、パケッ
ト交換網３により接続されておシ、これの中には、あら
かじめ例えば８系統のロジカルチャネル（以下、チャネ
ル）４１〜４８が定められている。In the figure, a transmitting terminal device (hereinafter referred to as 5TE) 1,
A receiving terminal equipment (hereinafter referred to as RTE) 2 is connected by a packet switching network 3, in which, for example, eight logical channels (hereinafter referred to as channels) 41 to 48 are predetermined. There is.
また、５ＴＥ１ 、 ＲＴＥ２は、各々、Ｘ２５プロト
コル部（以下、ＰＲＴ）１１ 、２１、チャネル制御部
（以下、ＣＨＣ）１２ 、２２、および、アプリケーシ
ョン部（以下、ＡＰＲ）１３ 、２３を備えていると共
に、５ＴＥＩＫは、監視パケット送信部（以下、５ＰＳ
）１４、および、応答パケット監視部（以下、ＡＰＤ）
１５が設けである一方、ＲＴＥ ２には、監視パケット
検出部（以下、５ＰＤ） ２４、および、応答パケット
送信部（以下、ＡＰＳ）２５が設けである。Furthermore, 5TE1 and RTE2 each include X25 protocol units (hereinafter referred to as PRT) 11 and 21, channel control units (hereinafter referred to as CHC) 12 and 22, and application units (hereinafter referred to as APR) 13 and 23. , 5TEIK is a monitoring packet transmitter (hereinafter referred to as 5PS
) 14, and response packet monitoring unit (hereinafter referred to as APD)
15 is provided, while the RTE 2 is provided with a monitoring packet detection section (hereinafter referred to as 5PD) 24 and a response packet transmission section (hereinafter referred to as APS) 25.
ここにおいて、正常時には、５ＴＥｉのＡＰＰ１３よシ
与えられるデータをパケット化し、ＣＨＣ１２が各チャ
ネル中のいずれか一つを指定し、これに応じてＰＲＴｌ
ｌがパケット交換網３中の指定されたチャネルを介して
パケットの送信を行なうと共に、５ＰＳ２４の指示にし
たがい、ＣＨＣｌ２よシ監視バケットの送信をＰＲＴｌ
ｌに対し一定周期により指令し、監視パケットの送信も
併せて行なうものとなっている。Here, during normal operation, data given by APP13 of 5TEi is packetized, CHC12 specifies one of each channel, and PRTl
CHCl2 transmits the packet via the designated channel in the packet switching network 3, and in accordance with the instructions from the 5PS24, CHCl2 transmits the monitoring bucket to PRTl.
1 at regular intervals, and also sends monitoring packets.
これらの各パケットは、ＲＴＥ２のＰＲＴ２１により受
信され、データはＣＨＣ２２を介してＡＰＲ２３へ与え
られる一方、監視パケットは５ＰＤ２４ Ｋよ）検出さ
れ、この検出出力に応じてＡＰＳ２５がＣＨＣ２２へ応
答パケットの送信を指示するものとなっておシ、これに
したがってＣＨＣ２２が応答パケットの送信をＰＲＴ２
１へ指令するため、監視パケットの受信とほぼ同時に応
答パケットの反信が行なわれる。Each of these packets is received by the PRT 21 of the RTE 2, and the data is given to the APR 23 via the CHC 22, while the monitoring packet is detected by the 5PD 24 (K), and in response to this detection output, the APS 25 sends a response packet to the CHC 22. In accordance with this, the CHC22 transmits the response packet to the PRT2.
1, the response packet is sent almost simultaneously with the reception of the monitoring packet.
この応答パケットは、パケット交換網３中の現用チャネ
ルを介し、５ＴＥ１のＰＲＴ １１ Ｋよシ受信され、
これがＣＨＣ１２を経てＡＰＤ ２５により検出される
と共に、ＡＰＤ２５中のタイマーによ）応答パケットの
受信間隔が監視されており、この間隔が監視パケットの
送信周期と対応する時間にほぼ等しい所定時間以内のと
きは、現用チャネルが正常であるのに対し、応答パケッ
トの受信間隔が所定時間を越えれば、各パケットの現用
チャネルによる伝送が異常であり、現用チャネルに障害
を生じたため、ＡＰＤ２５が切替指令をＣＨＣｌ２へ与
え、これにより各チャネル４１〜４ｓ中の他のチャネル
を選択させ、これを用いて各パケットの伝送を継続させ
る。This response packet is received by PRT 11 K of 5TE1 via the working channel in packet switching network 3,
This is detected by the APD 25 via the CHC 12, and the reception interval of response packets is monitored by a timer in the APD 25, and when this interval is within a predetermined time approximately equal to the time corresponding to the transmission cycle of the monitoring packet. In this case, while the working channel is normal, if the reception interval of response packets exceeds a predetermined time, the transmission of each packet through the working channel is abnormal, and a failure has occurred in the working channel, so the APD 25 issues a switching command to CHCl2. This causes another channel among the channels 41 to 4s to be selected and is used to continue transmitting each packet.
以上の説明により明らかなとおシ本発明によれば、複数
のロジカルチャネルを定めておき、送信側から一定周期
によ）監視パケットを送信し、これに応じて受信側よシ
応答パケットの返信を行なわせ、これの送信側における
受信間隔が所定時間を越えたとき、各ロジカルチャネル
中の他のロジカルチャネルを用いるものとしたことにょ
シ、現用チャネルの障害検出および他のチャネルへの切
替が速やかとなシ、パケット伝送において顕著な効果が
得られる。As is clear from the above explanation, according to the present invention, a plurality of logical channels are defined, the sending side sends a monitoring packet (at regular intervals), and the receiving side responds with a response packet in response. When the reception interval on the transmitting side exceeds a predetermined time, another logical channel among each logical channel is used, so that failure of the working channel can be detected and switching to another channel can be performed quickly. A remarkable effect can be obtained in packet transmission.
図は本発明の実施例を示す機能的なブロック図である。
１・・・・送信側端末装置、２・・・・受信側端末装置
、３・・・・パケット交換網、４１〜４８・・・・ロジ
カルチャネル、１１．２１・虐・・プロトコル部、１２
．２２・・・・チャネル制御部、１４・・・・監視パケ
ット送信部、１５・・・・応答パケット監視部、２４・
・・・監視パケット検出部、２５・・・・応答パケット
送信部。The figure is a functional block diagram showing an embodiment of the present invention. 1... Sending side terminal device, 2... Receiving side terminal device, 3... Packet switching network, 41 to 48... Logical channel, 11.21... Protocol section, 12
．． 22...Channel control unit, 14...Monitoring packet transmitting unit, 15...Response packet monitoring unit, 24...
. . . Monitoring packet detection unit, 25 . . . Response packet transmission unit.
Claims (1)
ット形式によりデータ伝送を行なうパケット伝送方式に
おいて、複数のロジカルチヤネルをあらかじめ定めてお
き、該各ロジカルチヤネル中のいずれか一つを用いてパ
ケットの伝送を行なうと共に、送信側から一定周期によ
り監視パケットを送信し、受信側においては前記監視パ
ケットの受信に応じて応答パケットを返信し、該応答パ
ケットの受信間隔を前記送信側において監視し、前記受
信間隔が所定時間を越えたとき前記各ロジカルチヤネル
中の他のロジカルチヤネルを用いることを特徴とするパ
ケット伝送方式。In a packet transmission method in which data is transmitted in packet format using a packet switching network via logical channels, multiple logical channels are determined in advance, and packets are transmitted using one of the logical channels. At the same time, the transmitting side transmits a monitoring packet at regular intervals, the receiving side returns a response packet in response to the reception of the monitoring packet, the transmitting side monitors the reception interval of the response packet, and the reception interval is A packet transmission method characterized in that when a predetermined time period has elapsed, another logical channel among the respective logical channels is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63224535A JPH0273746A (en) | 1988-09-09 | 1988-09-09 | Packet transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63224535A JPH0273746A (en) | 1988-09-09 | 1988-09-09 | Packet transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0273746A true JPH0273746A (en) | 1990-03-13 |
Family
ID=16815322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63224535A Pending JPH0273746A (en) | 1988-09-09 | 1988-09-09 | Packet transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0273746A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269084B1 (en) | 1997-05-27 | 2001-07-31 | Oki Electric Industry Co., Ltd. | Time delay based solution of a telecommunication route |
| JP2006020318A (en) * | 2004-06-30 | 2006-01-19 | Zarlink Semiconductor Inc | Method and device for providing quick end-to-end fail-over in a packet-switching communication network |
| US7760719B2 (en) | 2004-06-30 | 2010-07-20 | Conexant Systems, Inc. | Combined pipelined classification and address search method and apparatus for switching environments |
-
1988
- 1988-09-09 JP JP63224535A patent/JPH0273746A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6269084B1 (en) | 1997-05-27 | 2001-07-31 | Oki Electric Industry Co., Ltd. | Time delay based solution of a telecommunication route |
| JP2006020318A (en) * | 2004-06-30 | 2006-01-19 | Zarlink Semiconductor Inc | Method and device for providing quick end-to-end fail-over in a packet-switching communication network |
| JP2010057190A (en) * | 2004-06-30 | 2010-03-11 | Conexant Systems Inc | Method and apparatus providing rapid end-to-end failover in packet switched communications network |
| US7760719B2 (en) | 2004-06-30 | 2010-07-20 | Conexant Systems, Inc. | Combined pipelined classification and address search method and apparatus for switching environments |
| US7813263B2 (en) | 2004-06-30 | 2010-10-12 | Conexant Systems, Inc. | Method and apparatus providing rapid end-to-end failover in a packet switched communications network |
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