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Path protection method for optimizing node sleep under delay and shared risk link group restraint

A link group and backup path technology, applied in the field of Internet routing technology, can solve problems such as wake-up delay, and achieve the effect of high accuracy and efficient resource sharing

Inactive Publication Date: 2012-01-18
BEIHANG UNIV
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Problems solved by technology

[0011] When the network needs to wake up one of the sleeping nodes immediately, it will take a period of time for the node to be in a fully working state from the current moment, which causes a wake-up delay

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  • Path protection method for optimizing node sleep under delay and shared risk link group restraint
  • Path protection method for optimizing node sleep under delay and shared risk link group restraint
  • Path protection method for optimizing node sleep under delay and shared risk link group restraint

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Embodiment Construction

[0074] In order to better verify the performance of the method proposed by the present invention, it is respectively applied to a 25-node network with a regular topology and simulated. Each link in the network has two randomly generated uniformly distributed and uncorrelated cost components (the delay is in the [0, 1] interval, and the reliability is in the [0.95, 1] ​​interval). The failure probability of each shared risk link group SRLG is in the interval [0, 0.05]. The constraints of end-to-end delay and SRLG reliability for each path are set to 5 and 0.75, respectively. The constraint on the reliability of the combined path SRLG is set to 0.9.

[0075] The performance of the method is evaluated by the average effect of executing 1000 randomly generated routing requests of source and destination nodes. The parameters used for performance evaluation include: the percentage of sleeping nodes in the network, and the average number of sleeping nodes actually awakened by each ...

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Abstract

The invention discloses a path protection method for optimizing node sleep in a green network under delay and shared risk link group restraint. By using the method, in path calculation, the influence of sleep or awakening delay on a node due to path delay before a sleep node is taken into consideration and the path end-to-end delay calculating precision is improved. A cost function used when the obtained path is selected not only ensures that the reliability of a combined path meets restraint, but also encourages link and sleep node resource share between the protecting paths through calculation of path occupied network link and node resources, therefore, the proportion of the sleep node in the network is increased and the awakening frequency on the sleep node is reduced. The complexity of the method approaches that of the traditional k shortest path calculation-based path protection method; and the invention has strong adaptability on the change of the data flow of the network and expresses excellent and stable performance.

Description

technical field [0001] Under the constraints of delay and shared risk link group (SRLG), quickly find a set of working and backup paths, and optimize the path of node sleep in the network under the premise that the end-to-end delay and total reliability of the combined path meet the quality of service requirements The protection method belongs to the technical field of Internet routing, and in particular relates to the field of green energy-saving network which reduces energy consumption of nodes in the network under the constraints of reliability parameters. Background technique [0002] In recent years, the expansion of network scale and capabilities has led to an increase in the energy consumption of devices in the network (references: Towards Green Broadband Access Networks, P.Chowdhury, M.Tornatore, S.Sarkar, and B.Mukherjee, GLOBECOM, 2009 IEEE , pp.1-6, 2009.). In response to this trend, the concept of "Green Network" (references: Greening of the Internet, M.Gupta an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/24H04L45/24
Inventor 刘阳郑铮刘兴春
Owner BEIHANG UNIV
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