WO2006085377A1 - データ配信方法及び端末 - Google Patents
データ配信方法及び端末 Download PDFInfo
- Publication number
- WO2006085377A1 WO2006085377A1 PCT/JP2005/002033 JP2005002033W WO2006085377A1 WO 2006085377 A1 WO2006085377 A1 WO 2006085377A1 JP 2005002033 W JP2005002033 W JP 2005002033W WO 2006085377 A1 WO2006085377 A1 WO 2006085377A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- terminal
- terminals
- rank
- information
- terminal group
- Prior art date
Links
Classifications
-
- 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]
- H04L12/46—Interconnection of networks
Definitions
- the present invention relates to a data distribution method and a terminal, and more particularly to a data distribution method and a terminal for distributing data from a sano to a plurality of terminals via a network.
- the bandwidth of a network is determined by calculation based on the amount of information exchanged over the network, and generally the type of information is generally relatively small, such as documents and still images. A network has been built accordingly.
- FIG. 1 shows a network configuration diagram for explaining a conventional client-server type data distribution method.
- a server 10 is connected to the router 11 constituting the head office LAN, and the router 11 is connected to the WAN 20.
- WAN20 has the Osaka branch Router 12 constituting the LAN, Router 13 constituting the LAN of the Sapporo branch, LA of the Fukuoka branch
- Each of the routers 14 that make up N is connected.
- switching hubs 15, 16, and 17 are connected to the router 12, and a plurality of terminals are connected to each of the switching hubs 15-17.
- Other branch offices and head office LANs have the same configuration.
- each branch terminal sends a request to the server 10 responsible for data distribution to request the data distribution.
- the server 10 receives a request for data distribution from each terminal, the server 10 starts transmitting data for each terminal.
- FIG. 2 is a network configuration diagram for explaining a conventional data distribution method using IP multicast.
- a server 30 is connected to a router 31 constituting the LAN of the head office, and the router 31 is connected to the WAN 20.
- the WAN 20 is connected to the router 32 constituting the Osaka branch LAN, the router 33 constituting the Sapporo branch LAN, and the router 34 constituting the Fukuoka branch LAN.
- switching hubs 35, 36, and 37 are connected to the router 32, and a plurality of terminals are connected to each of the switching hubs 35-37.
- Other branch offices and head office LANs have the same configuration.
- a multicast address is designated as a destination IP address when data is transmitted from the server 30 to a plurality of specific terminals.
- Class D addresses are used for multicast addresses, and a single multicast address represents one host group (a group of multiple terminals).
- all terminals connected to switching knobs 35, 36, and 37 are defined as one host group.
- a multicast packet is basically sent to all hosts in the network, and each host that receives the multicast packet determines whether it is included in the host group and selects the packet. .
- FIG. 3 is a network configuration diagram for explaining a conventional peer-to-peer distribution method.
- a server 40 is connected to a router 41 constituting the head office LAN, and the router 41 is connected to the WAN 20.
- WAN20 has LAN of Osaka branch office
- the router 42, the router 43 that makes up the LAN of the Sapporo branch, and the router 44 that makes up the LAN of the Fukuoka branch are connected!
- switching hubs 45, 46, 47 are connected to the router 42, and a plurality of terminals are connected to each of the switching hubs 45-47.
- Other branch offices and head office LANs have the same configuration.
- the initial terminal power for receiving information is also in order as shown by the broken arrows (1) to (5) in the figure, particularly on the LAN. Packets are transferred between terminals grouped in units such as segments that are related to physical arrangement.
- Patent Document 1 describes a technique in which the terminal side performs carrier sense after a predetermined delay time as means for realizing multicast communication.
- Patent Document 2 discloses a technique for identifying a slave unit in which a failure has occurred in an echo back state of communication information flowing in a communication path connected between a host communication device and a slave unit communication device. Is described.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-8642
- Patent Document 2 JP-A-6-244806
- a streaming server that stores and relays video and audio data transmitted from the headquarters within the LAN of each branch office is installed so that each terminal can access the streaming server from each terminal. If this is done, it will be possible to reduce access to the line part to the WAN 20 side, which has the highest degree of sharing. However, if there are many terminals on the distribution request side and the distribution data volume [(video + audio information) X number of distribution request terminals] is secured within the LAN and becomes larger than the bandwidth, the distribution will be successful. I can't.
- the present invention has been made in view of the above-mentioned points, and traffic in the case where information that requires real-time reproduction with a relatively large amount of information is received by a large number of terminals by using existing resources as much as possible. It is a general purpose to provide a data distribution method and a terminal capable of suppressing an increase in network performance and performing network efficiency.
- the present invention supports a local area network having a switching hub to which a plurality of terminals are connected by a network in which a wide area network is connected.
- a terminal group is configured by a plurality of terminals connected to the same switching knob, and the same A table in which the rank and address of each terminal in the terminal group are registered to each of a plurality of terminals connected to the switching knob is set, and real-time information from the Sarnoku is assigned to the highest rank of each terminal group.
- Real-time information received at each terminal and received at each terminal in the terminal group is configured to be sequentially transferred to the terminal lower by one than the own device in the table of each terminal.
- FIG. 1 is a network configuration diagram for explaining a conventional client-server type data distribution method.
- FIG. 2 is a network configuration diagram for explaining a conventional data distribution method using IP multicast.
- FIG. 3 is a network configuration diagram for explaining a conventional peer-to-peer distribution method.
- FIG. 4 is a network configuration diagram for explaining a data distribution method of the present invention.
- FIG. 5 is a diagram showing a terminal group address table.
- FIG. 6 is an operation sequence of the data distribution method of the present invention.
- FIG. 7 is a functional configuration diagram of an embodiment of a terminal applied to the method of the present invention.
- FIG. 8 Flow chart of the order establishment process executed when the data transfer system is started at the terminal.
- FIG. 9 is a flowchart of order establishment processing executed by a terminal when a search response is made.
- FIG. 10 is an operation sequence for establishing a rank in a terminal group.
- FIG. 4 is a network configuration diagram for explaining the data distribution method of the present invention.
- a server 50 is connected to a router 51 constituting the LAN of the head office, and the router 51 is connected to a WAN 60!
- WAN60 has a router 52 that makes up the LAN of the Osaka branch, a router 53 that makes up the LAN of the Sapporo branch, and a router that makes up the LAN of the Fukuoka branch 5
- the common port of the switching hubs 55, 56, 57 is connected to the router 52, and a plurality of terminals are connected to the cascade ports of the switching knobs 55-57.
- Other branch offices and head office LANs have the same configuration.
- each branch multiple terminals connected to individual switching knobs (55-57 in Osaka branch) form a terminal group, and receive video / audio information (real-time information) for each terminal group.
- the ranking is predetermined.
- Each terminal is provided with a terminal group address table as shown in Fig. 5 in which the rank, MAC address, and IP address of each terminal in the terminal group to which the terminal belongs are registered.
- FIG. 5 shows, for example, all terminals 61-63
- each terminal Based on the terminal group address table, each terminal makes a video / audio information transfer request at a predetermined cycle to a terminal having a rank higher by one than its own rank.
- a method for setting the above-mentioned terminal group address table for each terminal a first method that is individually set for each terminal by a system administrator, a database of an existing server connected to a LAN or WAN
- FIG. 6 shows an operation sequence of the data distribution method of the present invention.
- the data distribution in the terminal group with 61-64 terminals connected to the individual cascade ports of the switching hub 55 in the Osaka branch.
- terminals 61-64 based on the terminal group address table, a data transfer system is started that requests video / audio information to be transferred to the terminal at a predetermined cycle, which is one higher than the rank of its own device. Have been.
- the number of terminals is explained as four for convenience, but the number of terminals may be more or less.
- the video and audio information sent from the server 50 at the head office is transmitted to the routers 52-54 of each branch through the WAN 60.
- the routers 52-54 of each branch are connected to the switching hubs under their control (at the Osaka branch Start the data transfer system among the terminals of each terminal group connected to the switching node 55-57), and rank the highest rank in each terminal group.
- the video / audio information is transmitted to the terminal that made the transmission request.
- the video 'audio information passed from the server 50 via the switching knob 55 is received first by the terminal 62 having the highest rank in the terminal group, and the terminal 62 buffers the received video' audio information. Play with higher-level software. Also, when there is a transfer request from the terminal 61 having a lower rank, the terminal 62 is the terminal that made the transfer request in the terminal group. Buffer video addressed to end 61 and transfer video / audio information.
- the terminal 61 buffers the received video / audio information and reproduces it with the upper software. Further, when there is a transfer request from the terminal 63 having a lower rank, the terminal 61 transfers the buffered video and audio information to the terminal 63 that has made the transfer request in the terminal group.
- the terminal 63 buffers the received video / audio information and reproduces it with the upper software. Also, when there is a transfer request from the terminal 64 having a lower rank, the terminal 63 buffers the video / audio information that is buffered to the terminal 64 that has made the transfer request in the terminal group. The terminal 64 buffers the received video / audio information and reproduces it with the upper software.
- the non-transfer port is a port to which a terminal not using the data transfer system is connected, or an empty port.
- video and audio information packets are transferred between each terminal like a bucket relay, a delay occurs due to the transfer processing of the packets, and the delay time increases as the number of transfers increases.
- the maximum number of switching nodes is about 20 ports, and the delay time of the packet transfer processing to the last terminal is not a big problem for the purpose of distributing video and audio.
- traffic is transmitted between the terminals of the terminal group connected within each switching knob by sequentially transferring video / audio information packets simultaneously while each terminal reproduces it on its own device. It is possible to use a large amount of data such as video and audio on all terminals that want that information, while avoiding the pressure on the device.
- FIG. 7 shows a functional block diagram of an embodiment of a terminal applied to the method of the present invention.
- the terminal group address table 70 registers the rank and address of each terminal in the terminal group of each of a plurality of terminals that are connected to the same switching node and constitute the terminal group.
- the receiving unit 71 receives real-time information from the Sano-ku as well as a switching node or a higher terminal power than its own device and writes it in the buffer unit 77.
- the transfer unit 72 transfers the real-time information read from the notch unit 77 to the terminal lower by one in the terminal group address table 70 than its own device.
- the search unit 73 transmits search information to other terminals connected to the switching node and connected to the own device at the time of activation.
- the table registration unit 74 sets the rank of the own apparatus as the first position together with the address of the own apparatus in the terminal group address table 70, and other terminal capabilities for the search information.
- the table information included in the response is registered in the terminal group address table 70, and the terminal group address table is registered together with the address of the own device together with the address of the own device. Register with Bull 70.
- the response and registration unit 75 generates a response including the contents of the terminal group address table 70 as table information when other terminals also receive the search information, and returns the response to the transmission source of the search information.
- the terminal group address table The order is registered in the terminal group address table 70 together with the address of the transmission source terminal as the rank of the transmission source terminal of the search information.
- the reproduction unit 76 reproduces the real-time information received by the reception unit.
- Figure 8 shows a flowchart of the order establishment process that is executed when the data transfer system is started up on the terminal.
- the MA of its own device is selected at step S10.
- the search packet containing the C address and IP address is sent to the switch hub connected to the local device.
- the received search packet is broadcasted to terminals connected to all cascade ports other than the receiving port.
- step S11 it is determined whether or not there is a response to another terminal capability search packet within a predetermined time.
- the predetermined time is a time sufficient to receive a response from a terminal connected to the cascading port of the switching node to which the own apparatus is connected, that is, a terminal that constitutes the same terminal group as the own apparatus. It is. Therefore, even when a search packet is transmitted from a switching node common port to a terminal in a different terminal group via a router, a response from a terminal in a different terminal group is not received within a predetermined period of time. There is no risk that the terminal group terminal will be mistaken for the same terminal group as its own device.
- step S12 the order of the own apparatus is established as the first in step S12, and the terminal of the own apparatus is established in step S13. Register the rank (1st place), MAC address, and IP address of the local device in the DLP address table. The terminal group address table in the terminal is cleared at startup.
- step S14 the terminal group address table information included in the response finds the lowest rank, and the device's own rank is lowered by one from the lowest rank. Establish as a ranking.
- step S15 the terminal group address table information included in the response, the order of the own device, the MAC address, and the IP address are registered in the terminal group address table of the own device.
- the terminal group address table information included in each response is the same, so the rank of the own device is determined based on the response received first. Then, register it in the terminal group address table of its own device.
- FIG. 9 shows a flowchart of rank establishment processing executed by the terminal at the time of a search response.
- a response including the terminal group address table information obtained by copying the contents of the terminal group address table of its own device is generated in step S20, and the search packet is transmitted. Return to original.
- this response also includes your device's MAC address and IP address!
- step S21 the terminal group address table power of its own device is ranked in the lowest order. It finds and establishes a rank one lower than the lowest rank as the rank of the source terminal of the search packet.
- step S22 the rank, MAC address, and IP address of the source terminal of the search packet are registered in the terminal group address table of its own device.
- FIG. 10 shows an operation sequence for establishing a rank in a terminal group.
- the establishment of the rank in the terminal group composed of the terminals 61 to 64 connected to the individual ports (cascade ports) of the switching node 55 of the Osaka branch will be described.
- the number of terminals is described as four for convenience, but the number of terminals may be more or less. Further, it is assumed that the data transfer system software for executing the processes of FIGS. 8 and 9 is incorporated in each terminal 61-64 in advance.
- the terminal 62 that has activated the data transfer system earliest among a plurality of terminals in which the data transfer system is incorporated is already in all the terminals connected to the switching knob 55 to which the own device is connected.
- a search packet is transmitted to search for the presence of a terminal that activates the forwarding system (search for other nodes).
- terminal 61 that activated the data transfer system starts searching for another node.
- a response is returned from the terminal 62 to the terminal 61.
- terminal 61 Upon receiving the response from terminal 62, terminal 61 establishes its own device rank (second place), and ranks the MAC address and IP address of terminal 62 and its own device (terminal 61) in its own terminal group address table. Register.
- the terminal 62 that has received the search packet from the terminal 61 adds and updates the rank (second place) of the terminal 61, the MAC address, and the IP address in the terminal group address table of its own device.
- the terminal 63 that activated the data transfer system starts searching for another node.
- a response is returned from the terminals 61 and 62 to the terminal 63.
- Receives responses from terminals 61 and 62 The terminal 63 establishes its own device rank (third place), and registers the rank, MAC address and IP address of the terminals 61 and 62 and its own device (terminal 63) in its own terminal group address table. .
- each of the terminals 61 and 62 that have received the search packet from the terminal 63 adds and updates the rank (third position) of the terminal 63, the MAC address, and the IP address in its own terminal group address table.
- the terminal 64 that activated the data transfer system starts searching for another node, and after detecting the other node, the order of other nodes including its own device in its own terminal group address table, MAC address, and IP Register the address. Also, the terminals 61 to 63 that have received the search packet from the terminal 64 also register the rank (fourth position) of the terminal 64, the MAC address, and the IP address.
- each terminal confirms the startup status of the data transfer system with each other at regular time intervals, and confirms if the data transfer system is operating and V In such a case, the information of the terminal is deleted in the middle of each terminal group address table. In this way, the data transfer source and destination information can be self-maintained regularly to increase the reliability of the system.
- the receiving unit 71 corresponds to the receiving unit described in the claims
- the transfer unit 72 corresponds to the transfer unit
- the search unit 73 corresponds to the search unit
- the table registration unit 74 corresponds to the table registration unit.
- the response and registration unit 75 corresponds to the response and registration unit
- the playback unit 76 corresponds to the playback unit.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007502520A JP4351721B2 (ja) | 2005-02-10 | 2005-02-10 | データ配信方法及び端末 |
PCT/JP2005/002033 WO2006085377A1 (ja) | 2005-02-10 | 2005-02-10 | データ配信方法及び端末 |
US11/882,032 US7751343B2 (en) | 2005-02-10 | 2007-07-30 | Data transmission method and terminal used for data transmission method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/002033 WO2006085377A1 (ja) | 2005-02-10 | 2005-02-10 | データ配信方法及び端末 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/882,032 Continuation US7751343B2 (en) | 2005-02-10 | 2007-07-30 | Data transmission method and terminal used for data transmission method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006085377A1 true WO2006085377A1 (ja) | 2006-08-17 |
Family
ID=36792953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/002033 WO2006085377A1 (ja) | 2005-02-10 | 2005-02-10 | データ配信方法及び端末 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7751343B2 (ja) |
JP (1) | JP4351721B2 (ja) |
WO (1) | WO2006085377A1 (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07245612A (ja) * | 1994-03-04 | 1995-09-19 | Fujitsu Ltd | 同報通信離脱方式 |
JP2004297521A (ja) * | 2003-03-27 | 2004-10-21 | Fujitsu Ltd | マルチキャスト通信ネットワークにおける通信方法、受信端末、l2スイッチおよびl3スイッチ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06244806A (ja) | 1993-02-19 | 1994-09-02 | Sumitomo Electric Ind Ltd | 光通信システムの通信異常検出方法 |
US6947434B2 (en) * | 2000-11-16 | 2005-09-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Subgroup multicasting in a communications network |
JP4556351B2 (ja) | 2001-06-19 | 2010-10-06 | ソニー株式会社 | マルチキャスト通信方法およびシステム |
TWI265697B (en) * | 2002-06-06 | 2006-11-01 | Ibm | Digital contents distribution system, digital contents distribution method, computer readable recording medium storing the program therein, and server and client therefor |
US7573835B2 (en) * | 2004-08-16 | 2009-08-11 | Renesas Technology Corporation | Method, system, node, computer program product and communication packet for communicating information in an ad-hoc hierarchically addressed communication network |
US7738402B2 (en) * | 2004-12-23 | 2010-06-15 | Carmel-Haifa University Economic Corp. Ltd. | Ad hoc communication system and method for routing speech packets therein |
-
2005
- 2005-02-10 WO PCT/JP2005/002033 patent/WO2006085377A1/ja not_active Application Discontinuation
- 2005-02-10 JP JP2007502520A patent/JP4351721B2/ja not_active Expired - Fee Related
-
2007
- 2007-07-30 US US11/882,032 patent/US7751343B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07245612A (ja) * | 1994-03-04 | 1995-09-19 | Fujitsu Ltd | 同報通信離脱方式 |
JP2004297521A (ja) * | 2003-03-27 | 2004-10-21 | Fujitsu Ltd | マルチキャスト通信ネットワークにおける通信方法、受信端末、l2スイッチおよびl3スイッチ |
Non-Patent Citations (1)
Title |
---|
MIMURA K. ET AL.: "RelayCast: Peer to Peer-gata Stream Haishin no Tameno Middle Ware", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS GIJUTSU KENKYU HOKOKU, IN2002-43, P2, vol. 102, no. 214, 12 July 2002 (2002-07-12), XP003006188 * |
Also Published As
Publication number | Publication date |
---|---|
US7751343B2 (en) | 2010-07-06 |
JP4351721B2 (ja) | 2009-10-28 |
US20070274325A1 (en) | 2007-11-29 |
JPWO2006085377A1 (ja) | 2008-06-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7508827B2 (en) | Multicast routing program, multicast routing method, and multicast router | |
US7751394B2 (en) | Multicast packet relay device adapted for virtual router | |
JP3644009B2 (ja) | マルチキャストセッション管理装置 | |
JP4034780B2 (ja) | ディジタル・コンテンツ配信システム、ディジタル・コンテンツ配信方法、該方法を実行するためのプログラム、該プログラムを記憶したコンピュータ可読な記録媒体、およびそのためのサーバおよびクライアント | |
JP4820447B2 (ja) | マルチキャスト送信システムおよび方法 | |
EP1924030B1 (en) | A multicast supported virtual local area network switching system and a method thereof | |
KR20020048399A (ko) | 인터넷워크에서의 로버스트 및 스칼라 서비스-노드 위치를위한 근접-기반 방향 전환 시스템 | |
JP3731885B2 (ja) | ディジタル・コンテンツ配信システム、ディジタル・コンテンツ配信方法、そのためのサーバ、クライアント、サーバとしてコンピュータを制御するためのコンピュータ実行可能なプログラムおよびクライアントとしてコンピュータを制御するためのコンピュータ実行可能なプログラム | |
JP2004140539A (ja) | 情報ルーティング方式および情報中継装置 | |
JP2003188918A (ja) | アプリケーションレイヤ・マルチキャスト方式及びその中継ノードシステム | |
US20050195817A1 (en) | Switching device and multicast packet processing method therefor | |
US6208647B1 (en) | Multicast extension to data link layer protocols | |
WO2009082905A1 (fr) | Procédé système et dispositif commutateur permettant l'établissement dynamique de réseau local virtuel de multidiffusion | |
JPH11313059A (ja) | マルチキャスト通信方法及びそのシステム並びにマルチキャスト通信プログラムを記録した記録媒体 | |
US7457288B2 (en) | Relay multicast system and method for providing efficient group communication service | |
CN100488201C (zh) | 一种基于路由的链路备份方法 | |
US20050074010A1 (en) | Method and apparatus for exchanging routing information in distributed router system | |
JP7473025B2 (ja) | コンテンツ配信システム、ユニキャストマルチキャスト変換装置、コンテンツ配信方法及びコンテンツ配信プログラム | |
JP4351721B2 (ja) | データ配信方法及び端末 | |
JP4063786B2 (ja) | マルチキャストパケット配信システム | |
JP2000112853A (ja) | 双方向通信方法及び双方向通信システム | |
CN114679562B (zh) | 一种多平台视频会议的数据传输系统及方法 | |
JP7331554B2 (ja) | 処理装置、処理プログラムおよび処理方法 | |
JP3624063B2 (ja) | 実時間データ配送制御方法 | |
JP2002084321A (ja) | サーバからのリアルタイムデータ送信において、もっとも速くデータ転送可能なクライアントをサーバの代替として使う方法および機構 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2007502520 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11882032 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 11882032 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 05710085 Country of ref document: EP Kind code of ref document: A1 |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 5710085 Country of ref document: EP |