Journal on Communications ›› 2015, Vol. 36 ›› Issue (3): 254-264.doi: 10.11959/j.issn.1000-436x.2015082

• Academic paper • Previous Articles     Next Articles

Towards load adaptive routing based on link critical degree for delay-sensitive traffic in IP networks

Yang YANG1,2,3,Jia-hai YANG1,2,Hui WANG1,2,Chen-xi LI1,2,Yu-ding WANG1,2   

  1. 1 Institute for the Network Sciences and Cyberspace, Tsinghua University, Beijing 100084, China
    2 Tsinghua National Laboratory for Information Science and Technology (TNList), Beijing 100084, China
    3 Information Management Center, Xi'an Communication Institute, Xi'an 710106, China
  • Online:2015-03-25 Published:2017-06-21
  • Supported by:
    The National Basic Research Program of China (973 Program);The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;Specialized Research Fund for the Doctoral Program of Higher Educa-tion;Specialized Research Fund for the Doctoral Program of Higher Educa-tion

Abstract:

Delay-sensitive traffic requires lower end-to-end delay in IP networks, such as online video, VoIP, video con-ference. Based on the criticality degree of link. A load adaptive routing algorithm (LARA) was presented which could avoid the link to be congested to reduce the end-to-end delay. Firstly, an optimization objective function has been put forward; and then decomposed into several sub-functions by using convex optimization theory; finally, the optimization objective function and sub-functions were transformed into a simple distributed protocol. LARA with ECMP (equal-cost multipath) routing strategy was compared which was widely deployed in the network by using NS2 simulation under CERNET2 topology. By evaluating the feedback delay, packet loss rate and traffic load, the results show that LARA can exhibit good performance and achieve excellent load balance, and meanwhile improve the robustness of the link when using multipath routing technology.

Key words: network congestion, critical link, criticality degree of link, multipath routing, load balance

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