Chinese Journal of Computers   Full Text
Title	Generalized BER Based Theory and Methodology of End-to-End Rate Control for MANET Streaming Media Transmission
Authors	ZHU Xiao-Liang1),2) YANG Zong-Kai1) DU Xu1) CHENG Wen-Qing1)
Address	1)(Department of Electronics & Information Engineering, Huazhong University of Science & Technology, Wuhan 430074) 2)(Engineering Research Center for Education Information Technology, Huazhong Normal University, Wuhan 430079)
Year	2007
Issue	No.7(1154—1163)
Abstract &   Background	Abstract In consideration of features of MANET(Mobile Ad hoc Networks) and shortages of retransmission and packet fragment strategies in link layer based on IEEE 802.11, this paper researches on the theory of delay-constrained equation and the policy of packet-size adjustment in transport layer according to Generalized Bit Error Ratio(GBER) and wireless Packet Retransmission Ratio(PRR). A Variable Packet size TCP-Friendly Rate Control(VPTFRC) scheme for streaming media transmission over MANET based on the theory is proposed. Unlike other proposals, this mechanism takes the impact of wireless PRR on the packet-size adjustment and TFRC performance into consideration. The theoretical model and relevant detailed deduction are also presented. Simulation results demonstrate the proposed mechanism can simultaneously achieve higher goodput, better TCP fairness, shorter transmission delay and less jitter than TFRC protocol. keywords MANET; IEEE802.11; streaming media; TCP-friendly rate control; link layer retransmission background The project is one of the series studies of Streaming Media Transmissions in Internet in the Intelligent Internet Laboratory, Key laboratory of Hubei Province. The main objective of the project is to find effective schemes to translate multimedia information throughout both wireless and wired Internet. There are two directions authors are focusing on presently. One is wireless streaming transmission technology and the other is network caching. These methodologies are interrelated. One aspect of the project is supported the supports from National Natural Science Foundation of China (No.60302004) and the Natural Science Foundation of Hubei Province of China (No.2005ABA264). This paper aims to solve a kind of fundamental issues related to end-to-end rate control of MANET streaming media distribution with variable packet size that is thought to be more effective to minimize transmission delay than fixed one. Furthermore, the paper gives a further way to adjust packet size by generalized BER based delay-constrained equation in transport layer. The next step is to apply the generalized BER based packet size adjustment algorithms to wireless multi-path MDC transmission.