A Novel Scheme for Congestion Control in Hierarchical Mobile IPv6 Networks

†† †††† Summary Packet losses occur repeatedly due to temporal link disconnection during handoff in wireless networks. Also during the handoff, the amount of bandwidth present at the new point of attachment may be different from that of the previous one. Due to this bandwidth change, packet drops or wastage of resources and congestion may occur at the new access point. To overcome this problem, the present paper proposes a TCP (Transport Control Protocol) based Path Loss Acknowledgment (TCP– PLACK) mechanism in place of TCP-SACK (selective acknowledgement) mechanism. The proposed TCP-PLACK mechanism sends a special acknowledgment which consists of packet loss details and available bandwidth at the new access point whenever a TCP receiver is attached to a new access point after a disconnection period or handoff. On receiving this acknowledgment, the sender retransmits the lost packets and adjusts the sending rate according to the bandwidth availability at the new access point.

[1]  Charles E. Perkins,et al.  Mobility support in IPv6 , 1996, MobiCom '96.

[2]  Sally Floyd,et al.  Simulation-based comparisons of Tahoe, Reno and SACK TCP , 1996, CCRV.

[3]  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).

[4]  Nicolas Krommenacker,et al.  IEEE 802.11 Load Balancing: An Approach for QoS Enhancement , 2008, Int. J. Wirel. Inf. Networks.

[5]  Claude Castelluccia,et al.  Hierarchical Mobile IPv6 Mobility Management (HMIPv6) , 2005, RFC.

[6]  Vipul Gupta,et al.  Freeze-TCP: a true end-to-end TCP enhancement mechanism for mobile environments , 2000, Proceedings IEEE INFOCOM 2000. Conference on Computer Communications. Nineteenth Annual Joint Conference of the IEEE Computer and Communications Societies (Cat. No.00CH37064).

[7]  Sally Floyd,et al.  The NewReno Modification to TCP's Fast Recovery Algorithm , 2004, RFC.

[8]  Shiao-Li Tsao,et al.  A Dynamic Load Balancing Scheme for VoIP over WLANs , 2008, J. Inf. Sci. Eng..

[9]  Sally Floyd,et al.  TCP Selective Acknowledgement Options , 1996 .

[10]  Andrei V. Gurtov,et al.  Effect of vertical handovers on performance of TCP-friendly rate control , 2004, MOCO.

[11]  Thomas Narten,et al.  IPv6 Stateless Address Autoconfiguration , 1996, RFC.

[12]  Thomas Narten,et al.  Neighbor Discovery for IP Version 6 (IPv6) , 1996, RFC.

[13]  Antonios Argyriou,et al.  A joint performance model of TCP and TFRC with mobility management protocols , 2006, Wirel. Commun. Mob. Comput..

[14]  Tomasz Imielinski,et al.  Mobile Computing , 1996 .

[15]  Vern Paxson,et al.  TCP Congestion Control , 1999, RFC.

[16]  S. K. Srivatsa,et al.  A Handoff Technique to Improve TCP Performance in Next Generation Wireless Networks , 2008 .