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Relay equipment and communication system

A relay device and communication system technology, applied in the direction of transmission systems, digital transmission systems, electrical components, etc., can solve problems such as deterioration of communication quality, and achieve the effect of preventing delays and discarding

Inactive Publication Date: 2005-10-05
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that communication quality deteriorates

Method used

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  • Relay equipment and communication system
  • Relay equipment and communication system
  • Relay equipment and communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] Embodiment 1 of the present invention will be described using FIGS. 1 to 4 .

[0051] FIG. 1 is a block diagram of a relay device in Embodiment 1 of the present invention.

[0052] The relay device 1 includes at least one port (three of the first port 20 , the second port 21 , and the third port 22 in FIG. 1 ). Furthermore, the first port 20 , the second port 21 , and the third port 22 are respectively connected to different transmission paths 9 . The transmission paths 9 each have different bandwidths.

[0053]In addition, the transmission path 9 is a line connecting the relay device 1 and other terminals, and is configured by wire or wirelessly. As the wired transmission path, there are wired Ethernet (registered trademark), lamp line communication, and the like. As the wireless transmission path, there are communications based on wireless Ethernet (registered trademark), Bluetooth, and the like. Furthermore, the transmission path 9 includes a half-duplex communic...

Embodiment approach 2

[0097] Next, Embodiment 2 of the present invention will be described using FIGS. 7 and 8 . 7 and 8 are block diagrams of a communication system in Embodiment 2 of the present invention.

[0098] In Embodiment 2, a communication system in which a management device is added to a relay device will be described.

[0099] The management device 15 exchanges signals with the relay device 1 . The judging unit 16 included in the management device 15 judges usable ports and unusable ports, and notifies the relay device 1 of the judgment result. At this time, the management device 15 notifies the relay device 1 of the determination result via the communication unit 17 . The judgment result is stored as usability information 5 in the information storage unit 3 .

[0100] At this time, the judging unit 16 judges usable ports and unusable ports based on the communication rate information 18 about the communication rate of the transmitted packet and the bandwidth information 19 about the ...

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PUM

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Abstract

The present invention provides improved relay equipment including at least one port, through which packet transfer is executable, an information-containing unit containing target-to-be-used information and availability information, in which the target-to-be-used information distinguishes the at least one port between a target port for use in the packet transfer and a non-target port therefor, but the availability information distinguishes the at least one port between an usable port for use in the packet transfer and an unusable port therefor, a determining unit operable to determine an available port for use in the packet transfer from the at least one port in accordance with the target-to-be-used information and the availability information, and a relaying unit operable to execute the packet transfer through the available port. The improved relay equipment according to the present invention allows for the transfer of only packets having a communication rate equal or smaller than a bandwidth of each transmission link, and packet transfer without packet delay and without packet discard is achievable.

Description

technical field [0001] The present invention relates to a relay device and a communication system related to packet transmission. Background technique [0002] Packet transfer represented by the Internet and its lower layer Ethernet (registered trademark) is a best effort communication in which a packet is not guaranteed to arrive at a destination address from a transmission source. [0003] In packet transmission, it is necessary to reserve resources of a communication path and ensure communication quality. [0004] Document 1 (RFC2205 "Resource ReServation Protocol (RSVP) Version 1 Functional Specification") discloses decentralized resource reservation. Document 1 discloses RSVP (Resource Reservation Protocol). [0005] Furthermore, Document 2 (RFC2814 "SBM (Subnet Bandwidth Manager): A Protocol for RSVP-based Admission Control Over IEEE802-Style networks") also discloses distributed resource reservation. Document 2 discloses DSBM (Subnet Bandwidth Manager). [0006] D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56
CPCH04L49/25H04L49/30
Inventor 安藤智大元政雄川口雄一大浦正登志水郁二
Owner PANASONIC CORP