Saturation Throughput Analysis of IEEE 802.15.6 Under Ideal Transmission Channel Condition

Abstract

Wireless Body Area Network (WBAN) is revolutionizing the way one can easily track and transmit various health statistics and vitals to the medical practitioners for next level analysis or suggestions over the wireless medium. A very special standard namely IEEE 802.15.6 is developed to promote the data transmission based on the traffic priority. Most of the existing studies have focused on the continuous (i.e. infinite) arrival of data packets from the heterogeneous sensor nodes, long waiting time of ACK packet, discrete (i.e. finite) traffic conditions for lossy and non-ideal channels. However, the lengthy and correlated contention window values for different user priority nodes, infinite retry counter limit in a backoff phase, along with constant collisions probability is still a challenging task in the improvement of the overall network performance. To tackle aforementioned issues, this paper presents a way to estimate the saturation throughput of the network for an ideal channel condition with different aspects. The analysis is based on a new concept of fixed retry counter (i.e. short retry counter, long retry counter, respectively), which is mainly used to reduce the unlimited backoff stages of each participating nodes in the data transmission phase. Additionally, this paper presents a simple modified five dimensional backoff model by including transmission states that account for successful packet transmission and failures of data packet due to the varying collisions in the channel. Further, this model considered that the highest priority node has always enough time to complete the packet transmission in a specific EAPs but other low priority node has not long enough to complete a packet transmission in RAPs and CAP. Simulation results show that the model accurately predicts the saturation throughput, delay, and collision probability with respect to the independent payload size.