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Method for improving GMPLS/OBS network link utilization rate

A network link and utilization rate technology, applied in the direction of network interconnection, data exchange network, data exchange through path configuration, etc., can solve the problem of idle channel resources, improve transmission performance, reduce storage time, save processing and The effect of transmission time

Inactive Publication Date: 2013-07-03
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

In the existing GMPLS / OBS network architecture, when the RSVP-TE protocol is used for resource reservation, there is a shortcoming that some channel resources are idle

Method used

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  • Method for improving GMPLS/OBS network link utilization rate
  • Method for improving GMPLS/OBS network link utilization rate

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Embodiment Construction

[0019] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0020] The basic idea of ​​the present invention is: in the process of establishing the TE tunnel on the control plane, when the PATH message reaches the previous node of the sink node, the RESV message is immediately returned to the source node. Assuming that there are n nodes in total, when the n-1th node sends a PATH message to the nth node, it returns a RESV message to the source node at the same time, which can save the resource reservation time of a node.

[0021]Since the link is partially idle when the resource reservation protocol is running and the OBS control layer does not take any action at this time, it can be modified during resource reservation to make full use of time and link resources. The PATH message sent by RSVP-TE signaling during resource reservation is only to inform each node of the reserved resource parameters, label address a...

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Abstract

The invention discloses a method for improving GMPLS / OBS network link utilization rate, and belongs to the field of optical network technology. The invention makes an improvement to the conventional resources reservation message mechanism of the GMPLS / OBS network, when the PATH message reaches a node before a host node, the node immediately returns an Resv message to a source node, thus saving the time spent in processing and transmitting the channel request message and the channel reservation message of a last hop link, reducing the storage time of the burst data at an edge node, and increasing the transmission performance of the OBS network.

Description

technical field [0001] The present invention relates to a method for improving the utilization rate of network links, in particular to a network for improving the combination of Optical Burst Switch (OBS) and Generalized Mutiprotocol Label Switch (GMPLS) technologies (hereinafter referred to as GMPLS / OBS network for short) link utilization method, which belongs to the technical field of optical communication. Background technique [0002] Since the essence of the OBS is to use control packets to reserve the bandwidth at each node that the burst packets pass through, it is necessary to ensure a reasonable timing relationship between the burst packets and the control packets. According to whether there is a bias time, the protocol can be divided into two types, namely TAG (tell and go) and TAW (tell and wait). The edge node of OBS adopting TAG protocol sends the burst packet immediately after sending the control packet, so the optical cache is needed at the core node to store...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/917H04L12/24H04L47/76H04L12/46H04L47/724
Inventor 沈建华杨帆于飞程希梁兵
Owner NANJING UNIV OF POSTS & TELECOMM
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