Performance Analysis of Call Assignment and Carrier Packing Schemes for TDMA Systems

In IS-136 and GSM TDMA systems that employ dynamic channel allocation, it is important to minimize the number of active carriers for a given load. This paper studies the carrier packing properties for both call assignment and carrier repacking schemes, where the average number of active carriers and the average number of intra-sector (repack induced) handoffs per call are the relevant metrics. We show that the simple to implement Sequential Trunk Hunt (STH) call assignment scheme is almost as good as the optimal Intelligent Channel Assignment (ICA) scheme and that the MAxPack repacking scheme is optimal for both of these TDMA standards among call assignment and repacking schemes.