Title :
Performance analysis of the distributed queuing collision avoidance (DQCA) protocol with link adaptation
Author :
Kartsakli, Elli ; Verikoukis, Christos V. ; Alonso, Luis
Author_Institution :
Dept. of Signal Theor. & Commun. (TSC), Tech. Univ. of Catalunya (UPC)
Abstract :
DQCA is a near-optimum medium access control (MAC) protocol designed for wireless local access networks (WLANs). The protocol operates as a random access scheme under low traffic load and switches smoothly and automatically to a reservation scheme as the traffic grows. The inherent feedback mechanism of DQCA facilitates the implementation of a link adaptation algorithm that properly selects the best transmission rate taking into account the state of the wireless channel. This paper presents an analytical model for the evaluation of the performance in terms of throughput and mean message delay in the presence of a time-variant channel response.
Keywords :
access protocols; computer network performance evaluation; feedback; queueing theory; radio access networks; telecommunication congestion control; telecommunication traffic; time-varying channels; wireless LAN; wireless channels; DQCA protocol; MAC protocol design; WLAN; distributed queuing collision avoidance; inherent feedback mechanism; link adaptation algorithm; mean message delay; near-optimum medium access control protocol; network performance analysis; random access scheme; reservation scheme; time-variant channel response; traffic load; wireless channel; wireless local access networks; Access protocols; Collision avoidance; Communication system traffic control; Media Access Protocol; Performance analysis; Queueing analysis; Switches; Telecommunication traffic; Traffic control; Wireless application protocol; Local area networks; modeling; multiaccess communication; protocols;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2009.071342
