JPH05130141A - Packet transmitter - Google Patents

Packet transmitter

Info

Publication number
JPH05130141A
JPH05130141A JP3315205A JP31520591A JPH05130141A JP H05130141 A JPH05130141 A JP H05130141A JP 3315205 A JP3315205 A JP 3315205A JP 31520591 A JP31520591 A JP 31520591A JP H05130141 A JPH05130141 A JP H05130141A
Authority
JP
Japan
Prior art keywords
packet
time
packets
order
time information
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
Application number
JP3315205A
Other languages
Japanese (ja)
Inventor
Daisuke Taniguchi
大輔 谷口
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP3315205A priority Critical patent/JPH05130141A/en
Publication of JPH05130141A publication Critical patent/JPH05130141A/en
Pending legal-status Critical Current

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  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To provide the packet transmitter in which the sequence of packets are surely warranted even when the arrival sequence of packets are disturbed due to route changeover or the like in a redundancy system. CONSTITUTION:A packet composition section 2 adds two sets of time information as a time of transmission from a sending end and a time of a packet sent at a preceding time to the packet and sends the result. A packet decomposing section 1 at a receiver side stores the packet and time information to a buffer 1a and a sequence evaluation section 1b rearranges the sequence of received packets based on the time information and outputs the rearranged packets to warrant the sequence of the packets.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、パケットにその順序関
係の情報を付加して伝送網に送出するパケット伝送装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packet transmission device for adding information on the order of a packet to a packet and transmitting the packet to a transmission network.

【0002】[0002]

【従来の技術】従来より、パケット伝送を行う際、パケ
ットの継続性を保証するためにフレーム毎にシーケンス
番号を付加して伝送網に送出する方法が採用されてお
り、受信端末側では伝送されるパケットの上記シーケン
ス番号からパケットの順序関係を識別できる。
2. Description of the Related Art Conventionally, when performing packet transmission, a method has been adopted in which a sequence number is added to each frame and sent to a transmission network in order to guarantee the continuity of the packet. The order relation of the packets can be identified from the sequence number of the packet.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記の
如くパケットの伝送方式によっては、ネットワーク上で
パケットの到着順序が乱れた場合、パケットのシーケン
ス番号をもとにその順序性を保証するが、冗長系システ
ムにおけるルート切替等によりシーケンス番号が初期化
されるような場合は、シーケンス番号が連続でなくなり
パケットの順序性が保証されないという欠点がある。
However, depending on the packet transmission method as described above, when the order of arrival of packets is disturbed on the network, the order is guaranteed based on the sequence number of the packet, but redundancy is ensured. If the sequence numbers are initialized by route switching in a related system, the sequence numbers are not continuous and the packet order cannot be guaranteed.

【0004】本発明は、上述したような従来例における
問題点を解決するためになされたもので、冗長系システ
ムにおけるルート切替等により伝送網で伝送されるパケ
ットの到着順序が乱れた場合でも確実にパケットの順序
性を判別して保証することができるパケット伝送装置を
提供するものである。
The present invention has been made in order to solve the above-mentioned problems in the conventional example, and is reliable even when the arrival order of packets transmitted through a transmission network is disturbed due to route switching in a redundant system. The present invention provides a packet transmission device capable of determining and guaranteeing the order of packets.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に、本発明に係るパケット伝送装置は、パケットにその
送信端より送出する時刻と一つ前に送出したパケットの
時刻との2つの時刻情報を付加して送信するパケット組
立部を備えると共に、受信されたパケットとこれらの時
刻情報を蓄積する手段と、一定時間に受信したパケット
の順序を時刻順に並び替えて端末へ出力するとともに、
パケットに付加された時刻情報から欠損パケットを認識
し送信側に再送要求する手段とを有するパケット分解部
を備えたことを特徴とするものである。
In order to achieve the above object, a packet transmission apparatus according to the present invention has two time points, that is, a time when a packet is sent from its transmission end and a time when the packet is sent immediately before. In addition to providing a packet assembling unit for adding information and transmitting the received packets and means for accumulating these time information, the order of the packets received at a certain time is rearranged in order of time and output to the terminal,
It is characterized by comprising a packet disassembling unit having means for recognizing a lost packet from the time information added to the packet and requesting a retransmission to the transmitting side.

【0006】[0006]

【作用】本発明においては、パケット組立部でパケット
にその送信端より送出する時刻と一つ前に送出したパケ
ットの時刻の2つの時刻情報を付加して送信し、受信側
パケット分解部ではこれらのパケットと時刻情報を一定
時間蓄積する。パケットに付加された時刻情報から欠損
パケットを認識し送信側へ再送要求を行い、一定時間に
受信したパケットの順序を時刻情報に基づき並べ替えて
端末側に出力することにより、端末側で受け取るパケッ
トの順序性が保証される。
According to the present invention, the packet assembling section adds two pieces of time information to the packet, that is, the time when the packet is sent from the transmitting end and the time when the packet is sent immediately before, and transmits the packet. Packet and time information are accumulated for a certain period of time. Packets received by the terminal side by recognizing the missing packet from the time information added to the packet, requesting the retransmission to the transmitting side, rearranging the order of the packets received at a certain time based on the time information and outputting to the terminal side The order of is guaranteed.

【0007】[0007]

【実施例】次に本発明について図面を参照して説明す
る。
The present invention will be described below with reference to the drawings.

【0008】図1は、本発明のパケット伝送装置の端末
構成の一実施例である。図において、メッセージを送信
する場合、パケット組立部2は時計5からの時刻情報を
得て各パケットにそのパケットを送出する時刻を付加し
て送信処理部3及びルート切替スイッチ4を介してAま
たはBルートに送信する。また、一つ前に送出されたパ
ケットの時刻を記憶しておきその時刻情報も付加して送
信する。
FIG. 1 shows an embodiment of the terminal configuration of the packet transmission device of the present invention. In the figure, when transmitting a message, the packet assembling unit 2 obtains the time information from the clock 5 and adds the time at which the packet is to be sent to each packet, and adds A or A via the transmission processing unit 3 and the route changeover switch 4. Send to route B. In addition, the time of the packet transmitted immediately before is stored, and the time information is also added and transmitted.

【0009】メッセージを受信する場合は、ルート切替
スイッチ4及び受信処理部6を介してパケットを受信す
るパケット分解部1は、受信されたパケットとそれらの
時刻情報をバッファ1aに一定時間蓄積し、時計部5の
情報に基づき一定時間に受信したパケットの順序を順序
性評価部1bにより時刻順に並び替えて端末に出力す
る。また、パケットに付加された時刻情報から欠損パケ
ットを認識した時は順序性評価部1bから送信側へ再送
要求がなされる。
When receiving a message, the packet disassembling unit 1 that receives the packet via the route changeover switch 4 and the reception processing unit 6 stores the received packet and their time information in the buffer 1a for a certain period of time. Based on the information of the clock unit 5, the order evaluation unit 1b rearranges the order of the packets received at a fixed time and outputs the packets to the terminal. Further, when the missing packet is recognized from the time information added to the packet, the order evaluation unit 1b makes a retransmission request to the transmitting side.

【0010】図2は本実施例で用いられる時刻管理によ
るパケットフォーマットを示し、データiのパケットi
としては、データi−1の送出時間、データiの送出時
間、パケット種別情報及び分解されたメッセージの内の
i番目のデータで構成される。
FIG. 2 shows a packet format according to the time management used in this embodiment.
Is composed of the transmission time of the data i-1, the transmission time of the data i, the packet type information, and the i-th data of the decomposed message.

【0011】従って、上記実施例によれば、図1におい
て、障害検出時に受信処理部6の制御に基づきルート切
替スイッチ4によってルートが切り替っても受信される
パケットに付加された時刻情報に基づきパケットの順序
性が保証される。
Therefore, according to the above-described embodiment, in FIG. 1, based on the time information added to the packet received even if the route is switched by the route changeover switch 4 based on the control of the reception processing unit 6 when the failure is detected. Packet order is guaranteed.

【0012】[0012]

【発明の効果】以上説明したように、本発明はパケット
にその送信端より送出する時刻と一つ前に送出したパケ
ットの時刻の2つの時刻情報を付加して送信するので、
受信側では一定時間に受信したパケットの順序を時刻情
報に並べ替えて端末側に出力することにより、端末側で
受け取るパケットの順序性が保証されるという効果があ
る。
As described above, according to the present invention, two pieces of time information, that is, the time when the packet is sent from the sending end and the time when the packet is sent immediately before are added and sent.
The receiving side rearranges the order of the packets received at a certain time into time information and outputs it to the terminal side, so that the order of the packets received at the terminal side is guaranteed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例による構成図である。FIG. 1 is a configuration diagram according to an embodiment of the present invention.

【図2】本発明のパケットフォーマット図である。FIG. 2 is a packet format diagram of the present invention.

【符号の説明】[Explanation of symbols]

1 パケット分解部 1a バッファ 1b 順序性評価部 2 パケット組立部 3 送信処理部 4 ルート切替スイッチ 5 時計(時刻情報の供給) 6 受信処理部 1 packet disassembling unit 1a buffer 1b order evaluation unit 2 packet assembling unit 3 transmission processing unit 4 route change switch 5 clock (supply of time information) 6 reception processing unit

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 パケットにその順序関係の情報を付加し
て伝送網に送出するパケット伝送装置において、パケッ
トにその送信端より送出する時刻と一つ前に送出したパ
ケットの時刻との2つの時刻情報を付加して送信するパ
ケット組立部を備えると共に、受信されたパケットとこ
れらの時刻情報を蓄積する手段と、一定時間に受信した
パケットの順序を時刻順に並び替えて端末へ出力すると
ともに、パケットに付加された時刻情報から欠損パケッ
トを認識し送信側に再送要求する手段とを有するパケッ
ト分解部を備えたことを特徴とするパケット伝送装置。
1. A packet transmission apparatus that adds information on the order relation to a packet and sends the packet to a transmission network, that is, two times, that is, the time when the packet is sent from the sending end and the time when the packet is sent immediately before. It has a packet assembling unit that adds information and transmits it, a means for accumulating received packets and their time information, and outputs packets to a terminal by rearranging the order of packets received at a certain time in order of time. A packet transmission device comprising: a packet disassembling unit having means for recognizing a lost packet from the time information added to and requesting a retransmission to the transmitting side.
JP3315205A 1991-11-05 1991-11-05 Packet transmitter Pending JPH05130141A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3315205A JPH05130141A (en) 1991-11-05 1991-11-05 Packet transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3315205A JPH05130141A (en) 1991-11-05 1991-11-05 Packet transmitter

Publications (1)

Publication Number Publication Date
JPH05130141A true JPH05130141A (en) 1993-05-25

Family

ID=18062673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3315205A Pending JPH05130141A (en) 1991-11-05 1991-11-05 Packet transmitter

Country Status (1)

Country Link
JP (1) JPH05130141A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1069442A (en) * 1996-08-28 1998-03-10 Oki Electric Ind Co Ltd Information transfer system, information storage and provision device, and information provided device
CN1305277C (en) * 2003-05-28 2007-03-14 英特尔公司 Method and system for maintaining partial order of packets
CN1306773C (en) * 2003-05-28 2007-03-21 英特尔公司 Method and system for maintenance of packet order using caching
US8780918B2 (en) 2009-03-19 2014-07-15 Fujitsu Limited Data processing apparatus and redundancy switching method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1069442A (en) * 1996-08-28 1998-03-10 Oki Electric Ind Co Ltd Information transfer system, information storage and provision device, and information provided device
CN1305277C (en) * 2003-05-28 2007-03-14 英特尔公司 Method and system for maintaining partial order of packets
CN1306773C (en) * 2003-05-28 2007-03-21 英特尔公司 Method and system for maintenance of packet order using caching
US8780918B2 (en) 2009-03-19 2014-07-15 Fujitsu Limited Data processing apparatus and redundancy switching method

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