| Abstract: | The emerging mobile services, including m-commerce, have received considerable interest among researchers, developers, service providers, and users. Some of these mobile services require the support for group communications among mobile users for conducting transactions. Therefore, there is a need for protocols that are designed to support transactions for group-oriented mobile services especially under brief dis-connectivity and/or intermittent connectivity. In this paper, we identify the transaction requirements of group-oriented mobile services, present three protocol schemes and several new metrics for transactions, and evaluate the performance of protocol schemes under varying conditions. Our results show that higher levels of transaction completion probabilities and lower levels of transaction delays can be achieved to support the performance requirements of diverse group-oriented mobile services.Upkar Varshney is an Associate Professor of CIS at Georgia State University, Atlanta. He has authored over 80 papers on wireless networks, mobile commerce, and other topics in major journals and international conferences. Many of his papers are among the most widely cited publications in m-commerce. He has delivered over 50 invited speeches, including several keynotes at conferences and workshops. Upkar was awarded Myron T. Greene CIS Outstanding Teaching Award in 2000 and RCB College Outstanding Teaching Award in 2002. He is also on the editorial board of IEEE Computer, International Journal on Mobile Communications, and Communications of AIS. He has also served on the program committees several international conferences. He is a member of the ACM, IEEE, and AIS.This revised version was published online in August 2005 with a corrected cover date. |
