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Priority-based inter-domain resource reservation method

A resource reservation and prioritization technology, applied to multiplexing system selection devices, electrical components, selection devices, etc., can solve the problem of cross-level multi-control domain establishment, lack of common vacant wavelength, and connection time extension and other issues, to achieve the effect of short service establishment time and superior network performance

Inactive Publication Date: 2010-05-26
UNIV OF SCI & TECH BEIJING
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in a multi-domain optical network, the distance of an optical path is much longer than that of a single-domain optical network, and the idle wavelengths in each domain are also different. The probability of not getting a common spare wavelength during the connection process using FRP increases, which will lead to network congestion. Continue to increase; while using BRP due to too many business requests, the probability that the spare wavelength reserved by a connection request has been occupied by other connections increases, which will lead to a longer connection time
The disadvantages of FRP and BRP are more obvious. They cannot quickly and effectively establish optical path connections across multi-level and multi-control domains. Other protocols proposed on the basis of the two also have their own limitations and cannot be directly used in multi-layer and multi-domain. In optical network

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Embodiment Construction

[0028] The present invention mainly does the following work: through the improvement of FRP and BRP resource reservation technology, a new resource reservation method applied to multi-layer multi-domain intelligent optical network and supporting service priority is proposed: priority-based domain The technical solution of IDRPBP is illustrated by the following example:

[0029] Set the network environment as image 3 As shown in , it is assumed that the boundary nodes of each control domain have the wavelength conversion capability. The source node of the client sends a connection establishment request, requesting to establish an LSP from the source node to a destination node in domain n through multiple control domains. According to the respective characteristics of different services passing through multiple control domains, each service is assigned a number from 0 to 7 to represent different priorities, among which 7 indicates that the service has the highest priority...

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Abstract

The invention provides a resource reservation protocol-traffic engineering (RSVP-TE)-based resource reservation method capable of allocating priorities to services requiring connection and processing according to the priority, namely a priority-based inter-domain resource reservation method, which is applied to an all-optical network with a multi-layer multi-domain control sub-network. The technical key points are that different priorities are allocated to the services requiring connection, and a resource reservation process is completed by two steps of temporary reservation and definite reservation. The method has lower service blocking rate than a forward reservation protocol (FRP), has shorter service connection establishing time than a backward reservation protocol (BRP), greatly optimizes network performance, overcomes the defect that the conventional resource reservation methods cannot adapt to the multi-layer multi-domain optical network environment, and effectively establishesLSP in the multi-layer multi-domain network with wavelength conversion capacity. Meanwhile, service priority differentiation is supported, and the service with higher priority request the resource reservation in priority; and the method meets the requirement of development of future ASON networks.

Description

Technical field: [0001] The present invention relates to an improved method of the resource reservation method (RSVP-TE) signaling protocol based on traffic engineering in an automatic switching optical network (ASON), which is a method for supporting request services in a multi-layer and multi-domain network environment. The resource reservation method for priority processing belongs to network technology and communication technology, and is applicable to the application field of multi-layer and multi-domain distributed cooperative optical network. Background technique [0002] The ASON network is a new generation of optical network that is controlled by the signaling network and realizes a series of functions such as connection / disconnection, switching, and transmission of links in the optical transport network upon request from the user. The introduction of ASON is a major breakthrough in the optical transport network. It classifies services, intelligently configures netw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00
Inventor 王建萍杨凯汤靓洁
Owner UNIV OF SCI & TECH BEIJING
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