Performance of Different TCP Versions over UMTS Common/Dedicated Channels
نویسندگان
چکیده
This report deals with the analysis of the performance of different versions of the wide spread Transport Control Protocol (TCP) over 3G UMTS networks. This analysis is done through simulations executed on the Network Simulator version 2 (NS2) and its Enhanced UMTS Radio Access Network Extension (EURANE). Different tool enhancements were developed in order to make this project possible. This paper starts with explaining the main UMTS networks and TCP functionalities. Then, the performance of the most common TCP versions is analyzed with data transfer on the common channels only. Afterwards, the case of WEB traffic with a possible dedicated channel allocation is described. The impact of several parameters is analyzed. This last set of simulations is first done using a single non-preemptive inactivity timer for the DCH de-allocation, and then with hybrids preemptive/non-preemptive inactivity timers.
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