Computer Science ›› 2017, Vol. 44 ›› Issue (6): 97-101.doi: 10.11896/j.issn.1002-137X.2017.06.017

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Research on Heterogeneous Network Access Selection Algorithm Based on Improved Multiple Attribute

GAO Xiu-e and LI Ke-qiu   

  • Online:2018-11-13 Published:2018-11-13

Abstract: Aiming at the problem that the existing multi attribute handoff algorithm doesn’t consider the load balancing of the target network and can not guarantee the quality of network service,the heterogeneous network access algorithm based on improved multi attribute decision was put forward.Firstly,the gravity model is used to simplify the complica-ted calculation process of multiple attribute decision algorithms,reducing the execution time of network access handoff.Secondly,the optimal target network and suboptimal target network load are calculated by adding the load decision module before switching,to select the final target handoff network.Using MATLAB,NS2 simulation tools,etc,a hete-rogeneous network simulation environment for WLAN and UMTS fusion was built.The simulation results show that the algorithm significantly improves the load balancing degree and resources utilization rate of the whole network,and reduces the handoff blocking rate of the mobile terminal effectively.

Key words: Heterogeneous network,Access selection algorithm,Gravity model,Improved multiple attribute,Load balancing

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