Novel user-based packet classification in 802.16e to provide better performance

Abstract

IEEE 802.16e WiMAX standard classifies packets in the decreasing order of priority as UGS, RTPS, eRTPS, nRTPS, BE. This mechanism of classification is application dependent and a user will not be able to request for a change in priority even though higher priority traffic bandwidth might be available and the user is ready to pay more for elevation of low priority traffic to higher priority. We propose a new technique in this paper to implement user based priority between subscriber station (SS) and base station (BS). We suggest eight different priority levels for SS/User. For eight different priorities classification and information exchange between SS and BS, we propose to use unused bits of common encoding Type-Length-Value (TLV) sub-header in the Range Response (RNG-RSP) header. The simulation results reveal that the throughput of BE traffic for high priority user is 50% more than regular user when the number of User Equipment (UE) / SS in the system is 10.