A High Capacity Low Latency Guaranteed Time Slot Allocation Scheme for IEEE 802.15.4

作者：Khan Bilal Muhammad^*; Bilal Rabia

来源：Sensor Letters, 2012, 10(8): 1847-1854.

DOI：10.1166/sl.2012.2602

• Medium Access Control
• GTS Allocation
• Wireless Sensor Network
• WPAN

IEEE 802.15.4 standard provides Guaranteed Time Slot (GTS) mechanism to allocate specific duration within a superfranne structure for time critical transmission. This paper proposes a high throughput energy efficient guarantee time slot (HTGTS) allocation scheme using novel high rate collaborative codes. The sum rate of proposed collaborative codes is double than the conventional codes thus increasing the capacity of codes and allowing more nodes to simultaneously transmit at a given time slot. The protocol performs grouping of the nodes on the basis of distance from the coordinator and hence allocating different transmission power to each group. Due to the difference in transmission power among the groups same codes can be reused in the adjacent groups increasing the overall sum rate of the codes. The performance of HTGTS is evaluated through extensive simulation and analysis. It is shown from the results that the proposed scheme outperform significantly the existing IEEE 802.15.4 GTS allocation scheme as well as the conventional collaborative codes.

• 出版日期2012-12