PCLF: A Practical Cross-Layer Fast Handover Mechanism in IEEE 802.11 WLANs

As is known to us, the handover latency of FMIPv6 in its predictive mode is given little concerns. However our previous work [4] shows that FMIPv6 may suffer long handover latency in its predictive mode, and [4] identifies three key issues raising such problems. In this paper, we propose a practical cross-layer fast handover management mechanism (PCLF) to address these issues and improve success rate of mobility prediction. To solve the problem, PCLF includes a smart link layer trigger, a TBScan algorithm, a TBAPS algorithm, a buffering support Bi-Binding scheme and the smart link event notification policy. Experiment results show that our mechanism can achieve reasonable mobility prediction and seamless handover with no interruptions on upper layer applications (VoIP) in IEEE 802.11 WLANs. The average handover latency is less than 50ms, the success rate of mobility prediction is 97.7% and no packet loss is observed.

[1]  Héctor L. Velayos,et al.  Techniques to Reduce IEEE 802 . 11 b MAC Layer Handover Time , 2003 .

[2]  Rajeev Koodli,et al.  Fast Handovers for Mobile IPv6 , 2001, RFC.

[3]  Eryk Dutkiewicz,et al.  Performance Analysis and Optimization of Handoff Algorithms in Heterogeneous Wireless Networks , 2008, IEEE Transactions on Mobile Computing.

[4]  Aruna Seneviratne,et al.  A comparison of mechanisms for improving mobile IP handoff latency for end-to-end TCP , 2003, MobiCom '03.

[5]  Xiaobo Zhou,et al.  Improving the Performance of Fast Handovers in Mobile IPv6 , 2007, IEEE GLOBECOM 2007 - IEEE Global Telecommunications Conference.

[6]  Aruna Seneviratne,et al.  S-MIP: a seamless handoff architecture for mobile IP , 2003, IEEE INFOCOM 2003. Twenty-second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37428).

[7]  Young-Joo Suh,et al.  Performance comparison of mobile IPv6 and fast handovers for mobile IPv6 over wireless LANs , 2005, VTC-2005-Fall. 2005 IEEE 62nd Vehicular Technology Conference, 2005..

[8]  Hannes Hartenstein,et al.  A performance comparison of Mobile IPv6, Hierarchical Mobile IPv6, fast handovers for Mobile IPv6 and their combination , 2003, MOCO.

[9]  Jiang Xie,et al.  IEEE 802.11-Based Mobile IP Fast Handoff Latency Analysis , 2007, 2007 IEEE International Conference on Communications.

[10]  Zhongcheng Li,et al.  Handover Latency of Predictive FMIPv6 in IEEE 802.11 WLANs: A Cross Layer Perspective , 2009, 2009 Proceedings of 18th International Conference on Computer Communications and Networks.

[11]  Hesham Soliman,et al.  Simultaneous Bindings for Mobile IPv6 Fast Handovers , 2005 .

[12]  Yanghee Choi,et al.  Performance Analysis of Fast Handover in Mobile IPv6 Networks , 2003, PWC.

[13]  Haitao Wu,et al.  Proactive Scan: Fast Handoff with Smart Triggers for 802.11 Wireless LAN , 2007, IEEE INFOCOM 2007 - 26th IEEE International Conference on Computer Communications.