Method, device and system for calculating service path

A technology of business paths and paths, applied in the network field

Inactive Publication Date: 2009-10-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the bandwidth demand generated by the rapid growth of IP (Internet Protocol, Internet Protocol) services, and the suddenness and uncertainty of IP services require the network to dynamically allocate bandwidth, the existing static optical network

Method used

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  • Method, device and system for calculating service path
  • Method, device and system for calculating service path
  • Method, device and system for calculating service path

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] For the convenience of illustration, establish as image 3 The network topology shown includes: an autonomous system, a client device edge node, a network edge node, and a path computation unit. Wherein, the autonomous systems include: AS1, AS2, AS3, AS4, AS5 and AS6. Client equipment nodes include: CE1 and CE2. The network edge nodes include: PE1 and PE2. The path computation units include: PCE1, PCE2, PCE3, PCE4, PCE5 and PCE6. PE1 is the network edge node of AS1, and PE2 is the network edge node of AS2. And the next-hop PCEs of PCE1 are PCE2 and PCE3, the next-hop PCEs of PCE3 are PCE4 and PCE5, the next-hop PCEs of PCE4 are PCE6, and the next-hop PCEs of PCE5 are PCE6; correspondingly, the previous-hop PCEs of PCE6 They are PCE4 and PCE5. The last hop PCE of PCE4 is PCE3, the last hop PCE of PCE5 is PCE3, the last hop PCE of PCE3 is PCE1, and the last hop PCE of PCE2 is PCE1.

[0044] Such as Figure 4 As shown, it is a schematic flowchart of a method for calc...

Embodiment 3

[0094] Embodiment 3 of the present invention, a route calculation unit for implementing service route calculation, including:

[0095] A receiving module, configured to receive a path request message, where the path request message includes a service destination node;

[0096] The first module, if the path request message received by the receiving module is from a service source node, after adding the PCE information of the belonging PCE to the path request message, send it to the adjacent PCE;

[0097] A judging module, if the path request message received by the receiving module is from an adjacent PCE, judging whether the service destination node belongs to the autonomous system of the PCE;

[0098] The second module, if the judgment result of the judging module is no, then continue to send the information of the associated PCE to the path request message to the next one or more adjacent PCEs;

[0099] The third module, if the judgment result of the judging module is yes, ...

Embodiment 4

[0104] Embodiment 4 of the present invention, a network system for realizing service path calculation, including:

[0105] The first PCE is configured to receive the path request message carrying the service destination node information sent by the source node, add the source PCE information to the path request message and then send the path request message to its adjacent intermediate PCE;

[0106] The second PCE is used to determine whether the service destination node belongs to the autonomous system of this PCE after receiving the path request message, and if not, add its own PCE information to the path request message in turn and continue sending it to its neighbors other second PCE; if yes, add self PCE information to the path request message, obtain the PCE sequence from the source PCE to the destination PCE, and send a response message carrying the PCE sequence in the reverse direction according to the PCE sequence, ;

[0107] Wherein, the second PCE is further config...

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Abstract

The embodiment of the invention discloses a method for calculating a service path, which comprises the following steps: a source path computation element (PCE) corresponding to a service source node sends path request messages to adjacent PCEs after receiving path request messages; each PCE receiving the path request messages judges whether the service destination node belongs to an autonomous system or not; or else, after the individual PCE information is sequentially added to the path request messages, the path request messages are continuously sent to the next or a plurality of adjacent PCEs until the destination PCE is determined; the destination PCE acquires a PCE sequence according to the individual PCE information and the received path request messages, and then, a response message carrying the PCE sequence is sent to the opposite direction according to the PCE sequence until the source PCE receives the response message; and then, the service path is calculated according to the PCE sequence. The embodiment of the invention also discloses a device and a system for achieving calculation of the service path. The effects of information privacy and optimal utilization of network resources are achieved by using the method, the device and the system.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a method, device and system for calculating a service path. Background technique [0002] With the bandwidth demand generated by the rapid growth of IP (Internet Protocol, Internet Protocol) services, and the suddenness and uncertainty of IP services require the network to dynamically allocate bandwidth, the existing static optical network is difficult to meet the existing needs, ASON Technologies such as Automatic Switched Optical Network (Automatic Switched Optical Network) / GMPLS (Generalized Multi-Protocol Label Switching, Generalized Multi-Protocol Label Switching) are flourishing. In order to meet the needs of path computing in GMPLS, ASON and other networks, IETF (the Internet Engineering Task Force, Network Interconnection Engineering Task Force) established a PCE (Path Computation Element, Path Computation Element) working group to study the architecture and appl...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04Q11/00H04L12/701
Inventor 董继雄李丹
Owner HUAWEI TECH CO LTD
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