Throughput analysis and system parameter optimization of space sense based random access for TDD WLANs

Authors:
Lei Wang;Chengkang Pan;Yueming Cai
Affiliations:
Institute of Communications Engineering, PLA University of Science and Technology, Nanjing, China;Institute of Communications Engineering, PLA University of Science and Technology, Nanjing, China and National Mobile Communications Research Laboratory, Southeast University, Nanjing;Institute of Communications Engineering, PLA University of Science and Technology, Nanjing, China and National Mobile Communications Research Laboratory, Southeast University, Nanjing
Venue:
APCC'09 Proceedings of the 15th Asia-Pacific conference on Communications
Year:
2009

Citing 5
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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 signalto-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.