WO2006090789A1 - データ通信システム及びデータ通信方法 - Google Patents
データ通信システム及びデータ通信方法 Download PDFInfo
- Publication number
- WO2006090789A1 WO2006090789A1 PCT/JP2006/303303 JP2006303303W WO2006090789A1 WO 2006090789 A1 WO2006090789 A1 WO 2006090789A1 JP 2006303303 W JP2006303303 W JP 2006303303W WO 2006090789 A1 WO2006090789 A1 WO 2006090789A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- packet data
- data
- communication
- route
- duplicated
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/28—Flow control; Congestion control in relation to timing considerations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
- H04L45/243—Multipath using M+N parallel active paths
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/28—Flow control; Congestion control in relation to timing considerations
- H04L47/283—Flow control; Congestion control in relation to timing considerations in response to processing delays, e.g. caused by jitter or round trip time [RTT]
Definitions
- the present invention relates to a real-time service through a communication network constructed by connecting communication lines to each other such as the Internet, such as transmission / reception of packet data using IP packetized voice data such as an IP telephone.
- the present invention relates to a data communication system and a data communication method. Background art
- this packet communication includes a variable-length packet method in which the amount of data per packet changes within a certain range, and a method that performs communication using fixed-length packets (cells) such as 53 bytes in ATM. is there.
- each element (node) constituting the communication network is provided with a delay circuit that delays the signal of the input port corresponding to the delay caused by the buffer of each element. Then, the signal output from the output port of each element, propagates through the network and returns to the input port, detects which input port's delay circuit is output earliest, and minimizes the delay amount. Search for the route that becomes.
- Patent Document 1 Japanese Patent Laid-Open No. 5-14344
- the present invention has been made in view of the above points, and in data communication in a communication network such as the Internet, by using a plurality of transmission paths in the communication network, the jitter of the packet at the transmission destination
- the present invention is a data communication system that transmits and receives packet data through a communication network constructed by connecting communication lines to each other, and is transmitted on the transmission terminal side.
- Duplicating means for duplicating packet data
- address setting means for assigning unique address information to each duplicated packet data of the same content
- the sending means for sending the copied packet data to different routes on the communication network and the first packet data among the duplicated packet data of the same content at the receiving terminal side.
- a data communication method for transmitting and receiving packet data through a communication network constructed by connecting communication lines to each other, wherein the transmitted packet data is duplicated on the transmitting terminal side.
- unique address information is assigned to each duplicated packet data of the same content, and the duplicated packet data is sent to a different route on the communication network based on the address information.
- the first packet data is selected and acquired from the copied packet data having the same contents.
- one packet data is duplicated into a plurality of packet data, and these are transmitted on different communication paths. Therefore, for communication paths with different delay amounts, Packet data with the same content can be distributed.
- the packet data that has arrived first is selected on the receiving side, it is possible to select a communication path with a smaller delay amount without arranging complicated communication speed measuring means on the communication network. Become.
- the different communication paths are tracked, and when it is determined that the different communication paths are overlapped based on the tracking result, the path is preferably changed. In this case, if some or all of the multiple communication paths that are different are overlapped and eventually become the same path, a different communication path should be searched. It is possible to search for a route with a smaller amount of delay by changing the communication route that has not been successful.
- the path tracking is preferably performed periodically.
- the communication path can be reviewed periodically by re-tracking periodically, and a more appropriate communication path can be selected.
- a more appropriate communication path can be selected.
- it is flexible. Let's set it.
- FIG. 1 is a conceptual diagram showing a schematic configuration of a data communication system according to an embodiment.
- FIG. 2 is a block diagram showing an internal configuration of IP terminals 1 and 5 and ISPs 2 and 4 according to the embodiment.
- FIG. 3 is a sequence diagram showing an operation of the data communication system according to the embodiment.
- FIG. 4 is a conceptual diagram showing a schematic configuration of a data communication system according to a conventional example.
- FIG. 1 is a conceptual diagram showing a schematic configuration of the data communication system according to the present embodiment.
- the data communication system is an IP terminal (Vo) that can communicate bidirectionally via ISPs (Internet Services Providers) 2 and 4 arranged on the IP network 3. IP terminal) 1 and 5.
- ISPs Internet Services Providers
- IP terminal 1 and 5.
- IP network 3 like the Internet, connects various communication lines (public lines such as telephone lines, ISDN lines, ADSL lines, private lines, wireless communication networks) using the communication protocol TCPZIP.
- This IP network 3 includes LANs such as 10BA SE-T and 100BASE-TX intranets (enterprise networks) and home networks.
- the IP terminals 1 and 5 are arithmetic processing units equipped with a CPU, and can be realized by, for example, a general-purpose computer such as a personal computer or a dedicated device specialized in function. Includes PDAs (Personal Digital Assistance) and mobile phones.
- the IP terminals 1 and 5 have a so-called VoIP function for transmitting and receiving voice data as IP packet data through the IP network 3 and making a call.
- ISPs 2 and 4 are server devices or server device groups managed by Internet service providers, and connect company and home computers that are customers to the IP network 3 through telephone lines, ISDN lines, dedicated data communication lines, etc. System. In this embodiment, these ISPs 2 and 4 also have a function as a call agent server for a so-called IP phone. When providing an IP phone service on the IP network 3, the ISP 2 and 4 have the ability to relay packet data. Operates as a call controller that substitutes for IP network 3.
- the data communication system configured as described above is transmitted by the IP terminal 1 on the transmission side when packet data is transmitted and received between the IP terminals 1 and 5.
- Packet data a to be copied to a 'and a ", and these copied packet data a' and a" are sent to different routes (path 1 and path 2) on the IP network 3.
- the receiving side IP terminal 5 selects and acquires the first packet data out of the received packet data having the same contents.
- FIG. 2 is a block diagram showing an internal configuration of IP terminals 1 and 5 and ISPs 2 and 4 according to the present embodiment.
- IP terminals 1 and 5 have the same configuration, have both a transmission unit and a reception unit, and ISP 2 and 4 have the same configuration.
- IP terminal 1 A case where data is transmitted from the side to the IP terminal 5 side is shown as an example, and for convenience of explanation, each device on the transmission side and the reception side will be described with reference numerals without duplication.
- the IP terminal 1 on the transmission side is a communication interface that transmits and receives data to and from the VoIP unit 13, the transmitter 11, and the receiver 12 that convert voice data and packet data into each other to realize a voice call. 14 and.
- the communication interface 14 is a device for connecting the IP terminal 1 to the IP network 3 or software having a function thereof. When the communication interface 14 is connected to a telephone line, it performs mutual conversion between digital data and a voice signal. Modulator / demodulators such as modems that perform conversion between ADSL signals and LAN lines when connecting to ADSL lines Signal conversions such as ADSL modems that are necessary to connect to ISDN lines Terminations such as DSUs and terminal adapters Device included.
- Transmitter 11 includes, on the transmitting terminal side, a duplicating unit 111 that duplicates packet data to be transmitted, and an address setting unit 112 that assigns unique address information to each duplicated packet data having the same content.
- a transmitting unit 113 that transmits the duplicated packet data to the ISP 2 through the communication interface 14.
- the duplicating unit 111 copies the packet data input by the VoIP unit 13 without changing the contents (actual data part a) as a 'and a ", and adds headers IP' and IP" to these. This is a module that inputs data to the address setting unit 112 as separate data.
- the address setting unit 112 has the same contents of the source and destination IP addresses and the duplicated copies (a 'and a ") for the duplicate packet data headers having the same contents. This is a module that writes information to the effect that the destination IP address is IP addresses 1 and 2 assigned to each communication port of the receiving unit 524.
- Transmitter 113 sequentially sends these duplicated packets to ISP2 via communication interface 14.
- the receiver 12 includes a receiving unit 124 that receives packet data via the communication interface 14, a selection unit 123 that selects and acquires first-arrival packet data from among copied packet data having the same content, A synchronization processing unit 121 that restores the received packet data to the original data.
- the receiving unit 124 has communication ports with different IP addresses 1 and 2, and can receive packet data having the same content through different paths.
- the selection unit 123 analyzes the header of the packet data received by the reception unit 124, inputs the first packet data out of the packet data having the same content to the synchronization processing unit 121 in the subsequent stage, and receives the second packet data Is a module that destroys Specifically, if the received packet data is not yet received, it is transferred to the synchronization processing unit 121 as it is. If the received packet data has already been received, it is discarded without being transferred to the subsequent stage. Perform the process.
- the synchronization processing unit 121 is a module that rearranges packet data acquired via the selection unit 123, combines it with the original data, restores it, and inputs it to the VoIP unit 13. For example, when packet data is lost, the synchronization processing unit 121 performs processing such as executing error correction processing and notifying the transmission side of a retransmission request.
- ISP 2 on the transmission side includes a transfer unit 21, a routing table 23, a trace unit 22, and a route management unit 24.
- the transfer unit 21 is a sending means for sending to different routes on the IP network 3 based on the address information attached to each packet data.
- the routing table 23 is table data describing the transfer route on the IP network 3, and holds the address of the next node corresponding to the destination.
- the trace unit 22 is a module that periodically tracks the routing related to the two paths actually performed by the transfer unit 21, and some or all of the routings of two different paths 1 and 2 overlap. Then,! /, Is monitored and the result is notified to the route management unit 24. Note that the trace unit 22 in the present embodiment measures the response speed from each node, measures the communication addition to each node, and notifies the route management unit 24 when tracing.
- the route management unit 24 is a module that changes another route when different paths overlap due to the tracking result by the tracing unit 22. Specifically, the route management unit 24 detects a route that is not selected by the receiving unit on the receiving side (a route having a large communication delay) and tries to change the route that was not selected.
- the route management unit 24 in the present embodiment also has a function that takes into account the balance with the response speed in the trace unit 22 when changing the route, and a part of the paths 1 and 2 overlap. Even if it is, it is determined whether the communication speed (communication load) is approximate, and if the approximate value is equal to or greater than a predetermined threshold, the route is not changed. On the other hand, even if paths 1 and 2 do not overlap at all, if the response speed is approximate, an instruction is given to change to another route that should search for a route with a lower communication load.
- the IP terminal 5 on the receiving side has the same configuration as the IP terminal 1 on the transmitting side described above, and has the same VoIP unit 53, transmitter 51, receiver 52, and And a communication interface 54.
- the transmitter 51 includes a duplicating unit 511, an address setting unit 512, and a transmitting unit 513.
- the receiver 52 includes a receiving unit 524, a selecting unit 523, and a synchronization processing unit 521.
- the ISP4 on the receiving side has the same configuration as the ISP2 on the transmitting side described above, and the transfer unit 41, the routing table 43, the trace unit 42, and the path management are the same as those of the above-described modules. Part 44.
- FIG. 3 is a sequence diagram showing the operation of the data communication system according to the present embodiment.
- a case where data is transmitted from IP terminal 1 to IP terminal 5 will be described as an example, but the same applies to a case where data is transmitted from IP terminal 5 to IP terminal 1.
- voice is input at IP terminal 1 on the transmission side, and this voice data is converted into IP packet data al to a3 and input to duplicating section 111 (S101).
- Duplicate part 1 11 the packet data having the same content is copied to a plurality of copies a'l to a'3 and a "l to a" 3 (S102), and the receiving side receives the header IP 'and IP ⁇ of each packet data.
- the address information addressed to the plurality of IP addresses 1 and 2 included in the receiving unit 524 of the IP terminal 5 and the information indicating that the copies have the same contents are written (S103).
- the transmission unit 113 transmits these packet data to the ISP 2 through the communication interface 14 (S104).
- the ISP2 on the transmission side reads the header of each received packet data (S105), and by referring to the routing table 23 (S106), the different paths 1 and 2 for the different IP addresses 1 and 2 respectively.
- the second routing is determined and the transfer is executed (S107).
- Each of the transferred packets reaches the receiving ISP 4 through different paths 1 and 2, and is transferred to the receiving IP terminal 5 (S110).
- the IP terminal 5 on the receiving side receives packet data having the same contents at each of the IP addresses 1 and 2 of the receiving unit 524 (Slll). Then, the selection unit 523 acquires the first-arrival packet among the packets having the same content, and discards the later-arrival packet (S112). In the example shown in Fig. 1, a'3, a "2, and a'l are acquired and combined.
- one packet data is duplicated into a plurality of packet data, and these are transmitted on different paths 1 and 2, respectively. It is possible to distribute packet data with the same content over a communication path of a quantity (communication load).
- the receiving side IP terminal 5 selects the packet data that has arrived first, so it is possible to select a communication path with less delay than placing complicated communication speed measurement means on the communication network. It becomes.
- the different noses 1 and 2 are tracked by the trace unit 22 or 42, and if it is determined that the paths 1 and 2 are duplicated based on the tracking result, the receiving side Since the route that was not selected is changed, when multiple different communication routes are the same route, it is possible to search for a route with less delay.
- the present invention in data communication in a communication network such as the Internet, by using a plurality of transmission paths in the packet network, data congestion is avoided in real time, and transmission at the transmission destination is performed. Improve packet jitter and loss, improve communication reliability, and provide real-time services such as transmission / reception of IP packetized voice data such as IP phones with almost the same quality as circuit-switched networks. Can be provided.
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Telephonic Communication Services (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/817,089 US20090010248A1 (en) | 2005-02-25 | 2006-02-23 | Data Communication System and Data Communication Method |
JP2007504777A JPWO2006090789A1 (ja) | 2005-02-25 | 2006-02-23 | データ通信システム及びデータ通信方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005052119 | 2005-02-25 | ||
JP2005-052119 | 2005-02-25 |
Publications (1)
Publication Number | Publication Date |
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WO2006090789A1 true WO2006090789A1 (ja) | 2006-08-31 |
Family
ID=36927427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/303303 WO2006090789A1 (ja) | 2005-02-25 | 2006-02-23 | データ通信システム及びデータ通信方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20090010248A1 (ja) |
JP (1) | JPWO2006090789A1 (ja) |
KR (1) | KR20070110884A (ja) |
CN (1) | CN101124791A (ja) |
WO (1) | WO2006090789A1 (ja) |
Cited By (8)
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JP2007104604A (ja) * | 2005-10-07 | 2007-04-19 | Central Res Inst Of Electric Power Ind | データ伝送システム |
JP2008160495A (ja) * | 2006-12-25 | 2008-07-10 | Hitachi Ltd | モバイルipシステム |
JP2011109232A (ja) * | 2009-11-13 | 2011-06-02 | Mitsubishi Electric Corp | 通信ノード、通信システム並びにパケット通信方法 |
JP2011139303A (ja) * | 2009-12-28 | 2011-07-14 | Nec Corp | 通信システム、制御装置、通信制御方法、およびプログラム |
JP2011193042A (ja) * | 2010-03-11 | 2011-09-29 | Toshiba Corp | 映像再生装置及び映像再生方法 |
JP2013062693A (ja) * | 2011-09-13 | 2013-04-04 | Toshiba Corp | 通信システム、ネットワークデバイス、サーバ装置および通信制御方法 |
KR20140051488A (ko) * | 2012-10-09 | 2014-05-02 | 에스케이텔레콤 주식회사 | 단말장치 및 네트워크장치, 그 장치들의 동작 방법 |
JP2016181837A (ja) * | 2015-03-24 | 2016-10-13 | 日本電気株式会社 | 通信システム、通信装置、通信方法及びプログラム |
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US20090083366A1 (en) * | 2007-09-26 | 2009-03-26 | Martin Roantree | Secure document transmission |
US9605663B2 (en) * | 2010-08-24 | 2017-03-28 | Qwtip Llc | System and method for separating fluids and creating magnetic fields |
JP5440591B2 (ja) * | 2011-11-25 | 2014-03-12 | 横河電機株式会社 | フィールド無線システム |
US8837936B2 (en) * | 2012-06-25 | 2014-09-16 | Fujitsu Limited | Method and system for dynamic selection of transport path with lowest latency |
CN104243107A (zh) * | 2013-06-06 | 2014-12-24 | 深圳市腾讯计算机系统有限公司 | 数据传输方法、装置、终端、服务器及系统 |
US10320691B1 (en) | 2016-01-30 | 2019-06-11 | Innovium, Inc. | Visibility packets |
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US10735339B1 (en) | 2017-01-16 | 2020-08-04 | Innovium, Inc. | Intelligent packet queues with efficient delay tracking |
US11669076B2 (en) * | 2018-07-27 | 2023-06-06 | Rockwell Automation Technologies, Inc. | System and method of communicating unconnected messages over high availability industrial control systems |
US10838625B2 (en) * | 2018-10-06 | 2020-11-17 | International Business Machines Corporation | I/O response times in data replication environments |
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US11621904B1 (en) * | 2020-11-06 | 2023-04-04 | Innovium, Inc. | Path telemetry data collection |
US11784932B2 (en) | 2020-11-06 | 2023-10-10 | Innovium, Inc. | Delay-based automatic queue management and tail drop |
US11996932B2 (en) * | 2021-12-16 | 2024-05-28 | Nokia Solutions And Networks Oy | Active-active TDM PW with asymmetry control |
WO2024106808A1 (ko) * | 2022-11-15 | 2024-05-23 | 삼성전자 주식회사 | 무선 통신을 수행하기 위한 전자 장치 및 그의 동작 방법 |
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JP2007104604A (ja) * | 2005-10-07 | 2007-04-19 | Central Res Inst Of Electric Power Ind | データ伝送システム |
JP2008160495A (ja) * | 2006-12-25 | 2008-07-10 | Hitachi Ltd | モバイルipシステム |
JP2011109232A (ja) * | 2009-11-13 | 2011-06-02 | Mitsubishi Electric Corp | 通信ノード、通信システム並びにパケット通信方法 |
JP2011139303A (ja) * | 2009-12-28 | 2011-07-14 | Nec Corp | 通信システム、制御装置、通信制御方法、およびプログラム |
JP2011193042A (ja) * | 2010-03-11 | 2011-09-29 | Toshiba Corp | 映像再生装置及び映像再生方法 |
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JP2013062693A (ja) * | 2011-09-13 | 2013-04-04 | Toshiba Corp | 通信システム、ネットワークデバイス、サーバ装置および通信制御方法 |
KR20140051488A (ko) * | 2012-10-09 | 2014-05-02 | 에스케이텔레콤 주식회사 | 단말장치 및 네트워크장치, 그 장치들의 동작 방법 |
KR101975552B1 (ko) * | 2012-10-09 | 2019-05-07 | 에스케이텔레콤 주식회사 | 단말장치 및 네트워크장치, 그 장치들의 동작 방법 |
JP2016181837A (ja) * | 2015-03-24 | 2016-10-13 | 日本電気株式会社 | 通信システム、通信装置、通信方法及びプログラム |
Also Published As
Publication number | Publication date |
---|---|
KR20070110884A (ko) | 2007-11-20 |
JPWO2006090789A1 (ja) | 2008-07-24 |
US20090010248A1 (en) | 2009-01-08 |
CN101124791A (zh) | 2008-02-13 |
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