A cross-layer approach to enable multipacket transmission in MIMO-SDMA based WLAN

作     者：Sheng-bo CHEN Wei CHEN Wei-lan HUANG Li-jun ZHAI Xu-ming LIU 

作者机构：Department of Electronic Engineering. Tsinghua University Beijing 100084 China Nokia Research Center Beijing 100176 China 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2009年第10卷第2期

页      面：271-278页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统] 

基　　金：supported by the National Natural Science Foundation of China (No. 60832008) the Research Grants Council Joint Research Scheme National Natural Science Foundation of China (No. 60731160013) 

主　　题：Multiple input multiple output (MIMO) Medium access control (MAC) Cross-layer design 

摘      要：We propose a medium access control(MAC) protocol for uplink transmissions in wireless local area networks(WLANs),where both stations and access points(APs) are equipped with multiple antennas. The protocol solves some common problems in utilizing multiple input multiple output(MIMO) under the 802.11 protocol,e.g.,how to deploy preamble(training sequence) used for channel estimation and how to enable simultaneous data transmissions,and facilitates two simultaneous uplink data transmissions via a cross-layer approach. Furthermore,we develop a 3D discrete-time Markov model to analyze the per-formance of the proposed WLAN scheme. The analytical results are verified by simulation,and numerical results show that the system throughput can be significantly improved by our proposed scheme as compared with conventional schemes.