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Implementation and Performance Evaluation of Transaction Protocol for Wireless Internet Services  

Choi, Yoon-Suk (Dept.of Computer Science, Kyungpook National University)
Lim, Kyung-Shik (Dept.of Computer Science, Kyungpook National University)
Publication Information
Journal of KIISE:Information Networking / v.29, no.4, 2002 , pp. 447-458 More about this Journal
Abstract
In this paper, we design and implement Wireless Transaction Protocol(WTP) and evaluate it for wireless transaction processing in mobile computing environments. The design and implementation of WTP are based on the coroutine model that might be suitable for light-weight portable devices. We test the compatibility between our product and the other products such as Nokia, Kannel and WinWAP For the evaluation of WTP, we use an Internet simulator that can arbitrary generate random wireless errors based on the Gilbert model. In our experiment, the performance of WTP is measured and compared to those of Transmission Control Protocol(TCP) and TCP for Transactions. The experiment shows that WTP outperforms the other two protocols for wireless transaction processing in terms of throughput and delay. Especially, WTP shows much higher performance In ease of high error rate and high probability of burst errors. This comes from the fact that WTP uses a small number of packets to process a transaction compared to the other two protocols and introduces a fixed time interval for retransmission instead of the exponential backoff algorithm. The experiment also shows that the WTP performance is optimized when the retransmission counter is set to 5 or 6 in case of high burst error rate.
Keywords
TCP; T/TCP; WTP; WIM;
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