TAILIEUCHUNG - Báo cáo hóa học: "Performance characterization of CSMA/CA adapted multi-user MIMO aware MAC in WLANs"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Performance characterization of CSMA/CA adapted multi-user MIMO aware MAC in WLANs | Thapa et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 141 EURASIP Journal on . http content 2011 1 141 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Performance characterization of CSMA CA adapted multi-user MIMO aware MAC in WLANs Anup Thapa Subodh Pudasaini and Seokjoo Shin Abstract To realize the multi-user multiple input multiple output MIMO advantage over WLANs it requires significant changes in the MAC protocol. Either the dominant MAC protocol carrier sense multiple access collision avoidance CSMA CA needs to be replaced by a novel multi-user MIMO aware MAC protocol or it should be upgraded into multi-user MIMO aware CSMA CA. Nevertheless the simplest approach would be upgrading the CSMA CA. Simple modifications in the control packets format and or the channel access mechanism can upgrade CSMA CA into simple yet practicable multi-user MIMO aware MAC protocol. By utilizing convenient changes several modification approaches can be provisioned for this purpose. Hence it is important to understand their performance benefits and trade-offs. In this article we discuss some of such modification approaches that best represent the possible modifications. We provide their detail performance analysis based on analytical modeling and derived expressions in terms of throughput and delay. We also derive expressions for achievable performance and present their performance limits too. Keywords MIMO aware MAC multi-user MIMO aware CSMA CA multi-user spatial multiplexing WLAN 1. Introduction Multiple input multiple output MIMO is a radio communication technology that uses multiple antenna elements at both the transmitting and the receiving ends either to boost up channel capacity or to attain transmission reliability. Wireless networks deployed with the MIMO system can utilize these features by employing spatial multiplexing and or spatial diversity 1 2 . Spatial multiplexing is a MIMO .

TÀI LIỆU LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.