MAC and TCP coordination approach for performance...

Details MAC and TCP coordination approach for performance... MAC and TCP coordination approach for performance...

2011-06-28

2011-06-28

Juntima, Nittaya (Department: 2462)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S469000, C455S437000

Reexamination Certificate

active

07969946

ABSTRACT:
A mobile device includes a communications protocol stack including a MAC layer and TCP layer separated by an IP layer. A cross-layer coordination module parallel to the communications protocol stack is coupled to both the MAC layer and TCP layer. The MAC layer generates a message sent to the cross-layer coordination module indicating that the mobile device is about to engage in a communications handover from a first base station to a second base station. The cross-layer coordination module passes handover information to the TCP layer so as to inform the TCP layer of the communications handover. If the mobile device is operating as a TCP sender, the TCP layer freezes its connection and state during the communications handover. If the mobile device is operating as a TCP receiver, the TCP layer sends a TCP ACK message to a TCP sender having an advertised window size set to a zero value so as to cause the TCP sender to freeze a connection and state during communications handover.

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Tom Goff, James Moronski, D.S. Phatak, and Vipul Gupta, Freeze-TCP: A true end-to-end TCP enhancement mechanism for mobile enviroments, 2000, IEEE INFOCOM, pp. 1537-1545.
Hari Balakrishnan, Srinivassan Seshan, and Randy H. Katz, Improving Reliable Transport and Handoff Performance in Cellular Wireless Networks, In ACM Wireless Networks Journal (WINET), 1(4), Dec. 1995, pp. 1-19.
Injong Rhee, Nallathambi Balaguru, George N. Rouskas, MTCP: Scalable TCP-like Congestion Control for Reliable Multicast, 1999, IEEE, pp. 1265-1273.

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