Title :
Throughput analysis and system parameter optimization of space sense based random access for TDD WLANs
Author :
Wang, Lei ; Pan, Chengkang ; Cai, Yueming
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
Abstract :
A space sense based random access (SSRA) scheme is introduced for the uplink of time division duplex (TDD) WLANs with multiple receive antennas. In SSRA scheme, each user performs space sense process to predict the post-detection signal-to-interference-and-noise-ratio (SINR) of data packets. If the predicted SINR is larger than a given threshold, the user considers the channel idle and is permitted to transmit channel estimation sequence and data packet like hybrid ALOHA. Successful channel estimation means successful packet reception. An approximation of the throughput of this SSRA scheme is given. We also make efforts to find the optimized system parameters by numerical simulations.
Keywords :
access protocols; channel estimation; diversity reception; numerical analysis; optimisation; receiving antennas; wireless LAN; SSRA scheme; data packets; hybrid ALOHA; multiple receive antennas; numerical simulations; packet reception; space sense based random access; system parameter optimization; time division duplex WLAN; transmit channel estimation sequence; Access protocols; Channel estimation; Interference; Media Access Protocol; Mobile communication; Numerical simulation; Receiving antennas; Signal processing; Signal to noise ratio; Throughput; Hybrid ALOHA; WLAN; space sense;
Conference_Titel :
Communications, 2009. APCC 2009. 15th Asia-Pacific Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-4784-8
Electronic_ISBN :
978-1-4244-4785-5
DOI :
10.1109/APCC.2009.5375686
