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Route method and device

A routing and equipment technology, applied in the field of business routing methods and routing equipment, can solve the problems of long distance protection channel network, low business connection success rate, and large network backup bandwidth, so as to reduce business blocking rate, save waste, and improve The effect of network resource utilization

Active Publication Date: 2008-06-04
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can provide high failure protection for the business, the network backup bandwidth required to use these methods is a lot
At the same time, in order to achieve the protection condition of complete SRLG separation, the network distance of the protection path may be very long, especially when there are a lot of risks in the network or the network load is relatively heavy, and the network resources are scarce, it is necessary to look for protection that is completely separated from the working path. The business of path failure may be rejected all the time, so that the success rate of business connections in the network will be very low, resulting in a high blocking rate of the network, resulting in the network being unable to provide normal business transmission services for as many users as possible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] figure 1 It is a schematic flow chart of the routing method of this embodiment, as shown in the figure, this method includes:

[0038] Step 401: Service request routing.

[0039] Step 402: Find a working path for the service according to the requested bandwidth of the service.

[0040] According to the source node and the destination node of the service, in the network topology, the idle bandwidth in the link is searched for the service to meet the service request bandwidth as the working path, and the method for finding the working path can be determined by the existing technology, such as: Shortest path algorithm.

[0041] Step 403: Judging whether a working path can be found, if found, go to step 404; otherwise, go to step 410.

[0042] Step 404: Determine service reliability requirements.

[0043] In an actual network, not all services require complete SRLG separation protection. For example, there are services that require protection against single-link failure...

Embodiment 2

[0059] When configuring working paths (and protection paths) for services, in addition to adopting protection mechanisms with different SRLG separation degrees according to service reliability requirements, the impact of each SRLG on the transmission performance of the entire network can also be further considered.

[0060] figure 2 It is a schematic flow chart of the routing method of this embodiment, as shown in the figure, this method includes:

[0061] Step 501: Determine the impact of the SRLG on the transmission performance of the entire network.

[0062]In the network, the failure of the links on the working path and the protection path of the business will affect the business, and for the business, even if the probability of SRLG failure is the same, some business between the source node and the destination node may only be It is sensitive to some SRLG failures, or the SRLG failures have a relatively large impact on the transmission performance of these services in t...

Embodiment 3

[0146] Figure 7 It is a schematic structural diagram of the routing device of this embodiment. As shown in the figure, the routing device includes:

[0147] The service information storage unit 901 is used to store the information of the service requesting routing, for example, the service information includes the service request bandwidth, source node and destination node, and reliability requirements equal to information related to service routing.

[0148] The resource information storage unit 902 is configured to store information about link bandwidth resources in the current network, such as information such as idle bandwidth, working bandwidth, reserved bandwidth, and SRLG information.

[0149] The working channel assignment unit 903 is used to select the link in the network according to the source node S, the destination node D and the requested bandwidth of the service stored in the service information storage unit 901, and according to the idle bandwidth of the link ...

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Abstract

The invention relates to the field of communications and discloses a routing method for a service and a routing device. In the invention, flows of configuring the routing for the service includes the following steps: working pathway is configured for the service; reliability requirement of the service is determined; and protection pathway, a degree of phase separation between which and the working path SRLG meets the reliability requirement, is configured for the service. The invention realizes that different routing strategies are provided for the actual protection requirement distinguished, thus effectively lowering blocking probability of a network.

Description

technical field [0001] The present invention relates to the communication field, in particular to a service routing method and routing equipment. Background technique [0002] Network Survivability (Network Survivability) refers to the ability to recover services affected by network failures. It is an important issue that needs to be considered when it comes to networks, especially backbone networks. With the continuous development of Wavelength Division Multiplexing (WDM) technology, the number of multiplexed optical channels continues to increase, and the carrying capacity and transmission rate of the optical transport network are rapidly expanding, and the link transmission rate has reached tens of megabits per Seconds, the reliability and survivability of the optical network at this time are greatly challenged. [0003] The basic technologies of network survivability mainly include protection technology and recovery technology. The path-based protection mechanism is fas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/28
Inventor 徐慧颖赵太飞虞红芳李乐民
Owner HUAWEI TECH CO LTD
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