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Theoretical Analysis of GPRS Throughput and Delay

We present a theoretical analysis of the radio link control layer and media access control layer of the General Packet Radio Service, a packet data overlay of GSM. The analysis focuses on the effects of retransmissions on the throughput of an uplink Packet Data Traffic Channel. We are especially interested in the relative throughput of the four GPRS coding schemes. We find in addition to channel quality, throughput and the choice of optimum coding scheme depend on packet size and channel fading characteristics. We also present a retransmission protocol that can increase throughput at the expense of additional network control messages. 1.0 Introduction GPRS (General Packet Radio Service) is a packet data overlay to GSM (Global System for Mobile communications), which has the largest number of subscribers in the world among all wireless systems. In contrast to the original circuit switched transmission of