Title :
A Study of Two-Dimensional Reservation MAC Protocol for Wireless Communication Systems
Author :
Guo, Hongbo ; Zhao, Yuping
Author_Institution :
Sch. of Electron. Eng. & Comput. Sci., Peking Univ., Beijing
Abstract :
The efficiency of slotted-ALOHA scheme is upper limited by 37%. However, it is very easy to implement. To increase system efficiency, code division multiple accessing (CDMA) technique can be adopted in ALOHA scheme. This paper studies a medium access scheme, utilizing two dimensional reservations: time dimension and code dimension. The reservation rate and collision rate are analyzed theoretically. Simulation results are given under ideal channel condition and noisy single-path Rayleigh channel condition. Theoretical analysis and simulation results demonstrate that the reservation rate is increased and collision rate is reduced due to the anti-collision advantage of CDMA code.
Keywords :
Rayleigh channels; code division multiple access; wireless sensor networks; ALOHA scheme; CDMA code; MAC protocol; code dimension; code division multiple accessing; collision rate; noisy single-path Rayleigh channel; reservation rate; time dimension; wireless communication system; Access protocols; Analytical models; Communication system control; Computational modeling; Data communication; Media Access Protocol; Multiaccess communication; Wireless application protocol; Wireless communication; Wireless sensor networks;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.540
