Priority-based inter-domain resource reservation method

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...

AI Technical Summary

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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