CAP analysis of IEEE 802.15.3 MAC protocol

초록

IEEE 802.15.3 is designed for high data rates multimedia applications in Wireless Personal Area Network (WPAN). The piconet is the basic topology of IEEE 802.15.3, which consists of a number of independent devices and a Piconet Coordinator (PNC). Medium Access Control (MAC) protocol plays a vital role in determining the energy consumption of all devices within a piconet. IEEE 802.15.3 MAC adapts a hybrid approach, i.e., a combination of CSMA/CA and TDMA, in order to support real-time communication while maintaining the desired Quality of Service (QoS). The channel is bounded by superframe structures where each superframe consists of a beacon, a Contention Access Period (CAP), and a Channel Time Allocation Period (CTAP). In this paper, we focus on the CAP part of the superframe. Numerical approximations are derived to analyze the performance of CSMA/CA used in CAP in terms of probability of successful transmission, average number of collisions, and normalized throughput. Numerical results are validated by extensive simulations using NS-2 simulator. © 2011 Springer-Verlag Berlin Heidelberg.