Performance of deterministic packet access for personal communication systems

Packet access protocols for PCS (personal communication systems) have recently been demonstrated as very attractive since they increase the system capacity and permit decentralized switching and control. Among many multiple access mechanisms, packet reservation multiple access (PRMA) exploits the speech activity factor and uses S-Aloha for access to unused communication slots. A new protocol for fast slot allocation, RAMA (resource auction multiple access), uses a deterministic scheme where no slots are wasted due to collisions. A variation of RAMA, the TRAMA (tree-search resource auction multiple access) protocol, was proposed to increase the number of assignments per second. The goal of this work is to evaluate and compare the performance of RAMA and TRAMA in voice transmission. Simulation methods were used to calculate packet dropping probability, average access delay and statistics of speech clipping