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Adaptive wavelength adjustment mechanism applied to network construction

A wavelength adjustment and adaptive technology, applied in the field of communication, can solve the problems of reducing the network blocking rate, reducing the probability of network backward resource conflict, distributed network conflict, etc., to solve resource conflicts, reduce the probability of backward resource conflicts, reduce The effect of blocking rate

Inactive Publication Date: 2009-12-16
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

[0006] The present invention can effectively reduce the backward resource conflict probability of the network by adopting an adaptive wavelength adjustment mechanism in the network path construction process, thereby reducing the network blocking rate, thereby effectively solving the resource conflict problem of the distributed network

Method used

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  • Adaptive wavelength adjustment mechanism applied to network construction
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  • Adaptive wavelength adjustment mechanism applied to network construction

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Embodiment Construction

[0026] Such as figure 1 As shown, the 8-bit Reserved field in the RSVP Common Header defined by RFC2205 is not used. The present invention extends the Reserved field, and selects 1 bit of it as the CD field. And it is stipulated that when CD is 0, there is no potential resource conflict; when CD is 1, there is potential resource conflict.

[0027] refer to figure 2 As shown, there are nodes A, B, C, and D in the network. The available wavelengths between any two links in the entire network are λ1, λ2, λ3 and λ4. At time t1, node B starts to establish a service to node D, assuming that the routing result is B->C->D. Node B first queries its own PSB / RSB database and finds that it is empty, so it sets the CD bit to 0. After the PATH1 message is sent to node C via node B, node B writes the PSB information to node C in its empty PSB / RSB database.

[0028] At t2, node C receives the PATH 1 message, first reads the CD flag, and finds it is 0, so node C queries its own PSB / RSB ...

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Abstract

The invention discloses an adaptive wavelength adjustment mechanism applied to network construction, which belongs to the communication field. The mechanism extends an RSVP-TE protocol, and adds CD (Contention Detection) field to PATH messages in order to identify whether potential resource conflicts can occur during construction. Destination nodes are matched with different wavelength selection algorithm (FF, RF and LF) according to the CD field in the PATH messages. The mechanism has the advantages of effectively reducing the probability of backward resource conflicts of networks and then reducing the blocking rate of the networks, thereby effectively solving the resource conflicts of distributed networks.

Description

technical field [0001] The invention relates to an adaptive wavelength adjustment mechanism applied in network path construction, which belongs to the communication field. Background technique [0002] The general multi-protocol label switching (GMPLS) network realizes dynamic, real-time and on-demand network resource configuration and management by introducing a distributed control plane in the optical layer. Through the continuation and development of the original concept and technology, It has brought significant changes to the existing transmission network architecture. The control plane improves the efficiency of the network by changing some functions originally performed by centralized network management equipment to distributed nodes. [0003] The protocol used by the control plane mainly includes three parts: routing protocol, signaling protocol and link resource management protocol. Among them, the signaling protocol is used to create, maintain, restore and delete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00
Inventor 陆月明赵同纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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