Title :
A Throughput Comparison Based on S-ALOHA between Ad Hoc and Centrally Controlled CDMA Systems
Author :
Jian-wu, Zhang ; Ye-fan, CHEN ; Rui, HE
Author_Institution :
Coll. of Commun. Eng., Hangzhou Dianzi Univ.
Abstract :
The paper compared the throughput of ad hoc CDMA WLAN systems with centrally controlled WLAN systems, which used the same S-ALOHA random access protocol. Given the same finite users, packets arrival rate and the retransmission probability, we studied the two types of systems´ throughput by constructing similar Markov chains. Furthermore, we evaluated the influence of the spreading gain and error control coding on the throughput and normalized throughput. The efficiency of bandwidth utilization was also investigated by normalizing the system performance
Keywords :
Markov processes; ad hoc networks; code division multiple access; error correction codes; telecommunication control; wireless LAN; Markov chains; S-ALOHA; ad hoc CDMA WLAN systems; bandwidth utilization; centrally controlled CDMA systems; error control coding; finite users; packets arrival rate; random access protocol; retransmission probability; throughput comparison; Access protocols; Centralized control; Communication system control; Control system synthesis; Control systems; Downlink; Multiaccess communication; Sections; Throughput; Wireless LAN; Ad Hoc system; CDMA; S-ALOHA; WLAN; centrally controlled system;
Conference_Titel :
Industrial Electronics and Applications, 2006 1ST IEEE Conference on
Conference_Location :
Singapore
Print_ISBN :
0-7803-9513-1
Electronic_ISBN :
0-7803-9514-X
DOI :
10.1109/ICIEA.2006.257333
