08-12-2012, 03:34 PM
Mobile TCP
Mobile TCP.ppt (Size: 29.5 KB / Downloads: 26)
The M-TCP approach has same goals as I-TCP & snooping TCP
M-TCP wants to improve overall throughput, lower the delay
Maintains end to end semantics of TCP
Special handling of lengthy and/or frequent disconnections
M-TCP splits as I-TCP does
unmodified TCP fixed network to supervisory host (SH)
optimized TCP SH to MH
Supervisory host
no caching, no retransmission
monitors all packets, if disconnection detected
set sender window size to 0
sender automatically goes into persistent mode
old or new SH reopen the window
Advantages
1.Maintains semantics, supports disconnection, no buffer forwarding
Disadvantages
1.Loss on wireless link due to bit errors is propagated into fixed network
2.Modified TCP on wireless link requires an bandwidth manager