Smart Phone and Next Generation Mobile Computing

256 Smart Phone and Next-Generation Mobile Computing

recovery by conducting congestion avoidance rather than slow-start.

Details of TCP congestion control can be found at RFC 2001 and

Jacobson[13].

5.2.1 Wireless TCP Challenges

It should be noted that all the TCP schemes mentioned above are

based on characteristics of wired networks. With regard to TCP for

wireless communication, however, one must consider whether these

TCP schemes will still perform well, as the underlying communica-

tion infrastructure is completely different. Wireless communications

have imposed a number of challenges on TCP, including:

•

High packet drop rate — In contrast to wired networks, wireless

channels are known to have a quite high bit error rate, resulting in

a high packet ...