International Journal of Ethics in Engineering & Management Education (IJEEE)
With rapid advances in wireless communications and internetworking, Universal Mobile Telecommunications Systems (UMTS) plays a main role in emerging 3G wireless networks that have aimed to provision high speed data integrated with voice services. TCP, the dominant transport protocol for Internet applications, suffers severe performance degradation due to packet loss in the communication networks. Therefore, the 3G specification entity, 3GPP, has defined a reliable link layer protocol, RLC, to support packet switched services over UMTS. Since TCP will treat every packet loss as a sign of congestion, the schemes carried out at RLC layer reduces packet loss caused due to buffer overflow and the chances of mistaken invocation of the TCP congestion control mechanism.