A method and system for discovering path computing part and the server in this system

Abstract

The invention discloses a discover route computing element (PCE) system and the server in the system, which collects and stores PCE information by the special server. When the server receives PCE inquiry request from the client, the server will return PCE information to the client and realize PCE dynamic discovery. The invention also discloses a method of discovery route computing element and guarantees only the client with route computing request can participate into the course of finding PCE, simply realizes PCE dynamic discovery, greatly saves bandwidth and resources, realizes PCE discovery mechanism in intra-area / inter-area and improves PCE expansibility and is much easier for network configuration. In addition, the invention realizes PCE dynamic discovery of other area by the interactive of server in different areas. The invention also improves the safety of PCE discovery mechanism by authentication mode.

Description

technical field [0001] The present invention relates to Traffic Engineering (TE, Traffic Engineering) technology, especially a method and system for discovering Path Computation Element (PCE, Path Computation Element) and the server in the system. Background technique [0002] The main purpose of introducing traffic engineering in the network is to optimize the utilization of network resources, minimize network congestion, provide high-quality network services, and thus improve the profitability of operators. Therefore, how to better and more effectively deploy traffic engineering in the network has become the main direction of current traffic engineering research. Especially with the integration of various networks, there may be a variety of network devices in the same network, such as: Internet Protocol / Multiprotocol Label Switching Router (IP / MPLS Router), Time Division Multiplexing Switch (TDM, Time Division Multiplex and Multiplexer), Synchronous Optical Network / Synchr...

AI Technical Summary

Problems solved by technology

[0011] Judging from the existing PCE discovery mechanism based on IGP extensions, this mechanism requires all routers in the IGP domain to support and participate in the discovery of PCEs, even routers without any LSP calculation request must participate, so it undoubtedly consumes a lot of bandwidth and resources; And because the IGP extension information can only be transmitted in the IGP domain, only the PCEs in the IGP domain can be found, and the PCEs in other IGP domains cannot be found. In this way, the establishment of inter-domain traffic engineering LSP cannot be realized.

[0012] In addition, if you want to deploy a new PCE, you need to upgrade the entire network

Moreover, the existing PCE discovery mechanism based on IGP extension does not consider security issues

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