Method for implementing traffic engineering in GMPLS/OBS (generalized multi-protocol label switching/optical burst switching) network

Abstract

The invention discloses a method for implementing traffic engineering in a GMPLS / OBS (generalized multi-protocol label switching / optical burst switching) network. In the method, a label switching path is built by the aid of the shortest path algorithm taking the resource occupancy rate of current nodes as a constraint condition. The method particularly includes the steps: acquiring nodes in the GMPLS / OBS network and storing resource occupancy rate information of all adjacent nodes; firstly judging whether the resource occupancy rate of the adjacent nodes in the current nodes is smaller than a preset resource occupancy rate threshold or not when building a TE (traffic engineering) tunnel between a source node and a host node, and selecting the shortest path as a next node from the adjacent nodes with the resource occupancy rate smaller than the preset resource occupancy rate threshold by a routing algorithm if the resource occupancy rate of the adjacent nodes in the current nodes is smaller than the preset resource occupancy rate threshold; selecting the shortest path as a next node from all the adjacent nodes in the current nodes by the routing algorithm if not; and deducing the rest by analogy until the selected next node is the host node. By the method, the blocking rate of a link circuit can be decreased, business packet loss is decreased, a traffic engineering mechanism of the network is efficiently implemented, and the transmission property of the GMPLS / OBS network is improved.

Description

technical field [0001] The present invention relates to a method for implementing traffic engineering, in particular to a network combining Optical Burst Switch (OBS, Optical Burst Switch) and Generalized Multi-protocol Label Switching (GMPLS, Generalized Multi-protocol Label Switch) technologies ( Hereinafter referred to as GMPLS / OBS network for short), a method for realizing traffic engineering belongs to the technical field of optical communication. Background technique [0002] In recent years, Optical Burst Switching (OBS) has been considered as one of the most promising solutions for business-oriented IP over WDM. However, since the one-way resource reservation mechanisms such as JET and JIT used in the OBS network are connectionless control protocols (M.Yoo and C.Qiao. Just-Enough-Time (JET): A high speed Protocol for burst traffic in optical network, in IEEE / LEOS Technologies for a Global Information Infrastructure, pp.26-27, Aug.1997), therefore, when the network l...

AI Technical Summary

Problems solved by technology

[0015] Traditional routing algorithms such as the shortest path first algorithm (OSPF) and the distance vector algorithm (RIP) use the shortest path to forward data when selecting a path, making the shorter path prone to congestion, while the longer path is prone to idle

This kind of network congestion caused by the unbalanced use of network resources will inevitably reduce the overall performance of the network, and the quality of service (QoS) cannot be guaranteed.

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