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Network selection in heterogeneous wireless networks and vertical handoff technology research

Author: YouZuo
Tutor: JinHao
School: Beijing University of Posts and Telecommunications
Course: Communication and Information System
Keywords: Heterogeneous networks QoS Network selection MADM Vertical handoff
CLC: TN92
Type: Master's thesis
Year: 2010
Downloads: 156
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Abstract


Integration of multiple heterogeneous wireless networks has become the future mobile communication network technology development trend . In heterogeneous wireless network environment, how to move the terminal device select the appropriate wireless network and provide Quality of Service (QoS) guarantee for multimedia services, is heterogeneous wireless networks need to address key issues. Network selection and vertical handover as to improve the key technology of heterogeneous network QoS , has been widespread concern in the industry and the research focus , but also the main research content. In this paper, for the International Organization for Standardization in QoS research and standardization on the basis of in-depth research , elaborated under heterogeneous wireless network QoS guarantee key technologies for the current network selection in heterogeneous wireless network algorithm completeness , robustness , the lack of objectivity and accuracy , we propose a network selection based on intuitionistic fuzzy algorithm (IFMADM) and one based on the degree of phase from the multi-attribute decision algorithm (MADM). Simulation results show that , IFMADM algorithm to ensure the accuracy of the algorithm can dramatically improve both recognizable networks and network selection algorithm can avoid the sort unusual problem ; Theoretical analysis shows that the degree of phase from the MADM based algorithm avoids sorting unusual problem and to some extent, improve the network when the network selection recognizable . Additionally, this article uses a network selection algorithm is used to assess the performance of the sensitivity analysis method IFMADM performance of the algorithm was studied. Based on the above research , the paper switch for heterogeneous wireless network optimization requirements , we propose a sensitivity controlled vertical handover mechanism, which by controlling the sensitivity of the network selection algorithm to achieve the purpose of reducing the number of switches . The simulation results show that when the user of the plurality of access networks covering common cell boundary is moved, the mechanism can reduce the occurrence of abnormal network sorting , thereby reducing the switching frequency , ensure that the user QoS.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications
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