VSW-SOAP: A SOAP message transmission mechanism based on variable sliding window

As an extensible lightweight message processing framework, SOAP has become the lightweight communication protocol for large scale data exchange in the distributed environment. However, one of the most important problems of SOAP is its relatively poor performance which leads to its limit in high performance applications. The paper proposes a SOAP message transmission mechanism based on variable sliding window, which can improve the performance of SOAP and support transferring data of large, flexible or unknown size via SOAP. In addition, data segmentation is designed to transfer large data and variable-size data and variable sliding window is used to control and improve the transmission efficiency of SOAP messages. The algorithm of application level congestion control was proposed and the transmission reliability of SOAP message was discussed with respect to four exception cases. Finally, the two main impact factors for the transmission efficiency based on variable sliding window such as the size of the sliding window and the length of data slice are analyzed and tested. Simulation results show that transmission efficiency is effectively improved by a reasonable parameters set of the variable sliding window.