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Polling persisting multicast protocol based on retransmission acknowledgement mechanism in optical burst switching ring network

A technology of optical burst switching and multicast protocol, which is applied in the direction of data switching network, ring network, ring electromagnetic network, etc. It can solve the problems of affecting the reproduction distance and complexity, and achieve the goal of easy implementation, reduced complexity, and prevention of repeated reception. Effect

Inactive Publication Date: 2005-03-16
BEIJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

In optical packet switching, in order to extract the optical packet header, a part of the optical signal must be extracted for all wavelengths at each node for O / E / O conversion, so it is too complicated, and this optical signal extraction method will also seriously affect its regeneration distance

Method used

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  • Polling persisting multicast protocol based on retransmission acknowledgement mechanism in optical burst switching ring network
  • Polling persisting multicast protocol based on retransmission acknowledgement mechanism in optical burst switching ring network
  • Polling persisting multicast protocol based on retransmission acknowledgement mechanism in optical burst switching ring network

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Embodiment Construction

[0028] The multicast protocol proposed by the present invention is suitable for optical burst switching ring topology network, and the network structure is as follows image 3Shown is the structure diagram of the OBS ring network. The OBS ring network contains N nodes, and the N nodes are evenly distributed on the ring. There are N+1 wavelengths in each light, and each node can connect to multiple access networks, one of which is used as a control channel, and the remaining N One is used as a data channel for transmitting burst data. The emission wavelength of each node is different, that is, each node has a different emission wavelength to transmit data packets, which can eliminate emission competition and improve the performance of the optical burst switching network. In the OBS ring network, each node plays three roles: source node, intermediate node and destination node. When acting as a source node, the node assembles IP packets from the access network into burst packet...

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Abstract

The invention discloses a poll continuous multicast protocol based on repeating confirmation mechanism in light mutation exchange rig net. It supports reliable service, acquires the reliability through retransmitting and confirmation mechanism; the dispatcher processes the multicast queue with poll mode; when there has several data packet reaches the target joint, the target joint selects one to receive from the several data packet; if the joint can not receive the mutation packet to be signed, one or several joints in the multicast addresses does not receive the data packet transmitted from the source joint, the source joint retransmits the data packet, guarantees all the joints received the data. The method decreases the complexity of protocol, and the protocol is simplified through the smallest control.

Description

technical field [0001] The invention relates to an optical communication network, in particular to a polling continuous multicast protocol, which is applicable to a ring topology network and based on a retransmission confirmation mechanism in an optical burst switching ring network, and belongs to the field of optical fiber communication. Background technique [0002] With the rapid growth of data services around the world, higher requirements are placed on the bandwidth and switching capacity of the transport network. At present, the development of dense wavelength division multiplexing DWDM (Dense Wavelength Division Multiplexing) technology can provide bandwidth up to Tbps, but the switching rate of circuit switching technology is far lower than this requirement. Optical burst switching is a compromise between optical circuit switching and optical packet switching. Its switching granularity is between the two and combines the advantages of both. It is more flexible than c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/275H04L1/08H04L12/42H04L45/16
Inventor 纪越峰仇英辉高泽华
Owner BEIJING UNIV OF POSTS & TELECOMM
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