Optimisation of TCP performance over EGPRS in incremental redundancy mode

This paper investigates how to optimise TCP performance over the EGPRS (enhanced general packet radio service) downlink, when the EGPRS radio link layer is operating in pure incremental redundancy (IR) mode. Particular attention is paid to the optimal configuration of the IR algorithm itself. The influence of other key system operating parameters is also assessed. A set of optimal operating parameters is derived and discussed.