Judicious use algorithm for poll-me bit with active UGS connection in IEEE 802.16e to increase the performance

Mobile stations (MS) with active UGS connections are usually not polled for their non-UGS data. If the MS wishes to be polled for non-UGS data then it needs to set the poll-me (PM) bit to 1 in the Grant Management Sub-header. The IEEE standard 802.16e describes the method of setting PM bit to 1. However, it does not specify when to turn this bit to 0. If it remains 1, then after transmission of non-UGS packet the BS goes on polling the MS, which leads to wastage of bandwidth. This paper describes a novel algorithm of when to set the PM bit in grant management sub-header (GMS) to 1 (referred as ON) or 0 (OFF). Uplink bandwidth can be saved by setting PM bit to OFF in the GMS when non-UGS packets are empty of an MS. The analytical result reveals that, our proposed algorithm saves around 4% of bandwidth with respect to IEEE standard 802.16 in worst case scenario. This saved bandwidth can be used for other purpose to increase the overall performance.