Title :
An improvement of reservation code multiple access for integrated voice/data spread-spectrum system
Author :
Li, Jingfeng ; Cheng, Shixin
Author_Institution :
Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing, China
Abstract :
For local wireless communication, the reservation code multiple access (RCMA) protocol has been proposed as a promising MAC protocol. However, heavy collisions make more packet dropping in the heavy load condition in RCMA because RCMA uses the data packet itself to make a channel reservation, which is inefficient in that each unsuccessful reservation wastes one code. A new method, improved reservation code multiple access (IRCMA) based on the dynamic reservation spread code for an integrated voice and data spread-spectrum system is proposed in this paper. IRCMA splits the slot into several minislots if any code is an available one. This scatters users to contend available codes at different times. It reduces user access collisions and improves system performance according to computer simulation results
Keywords :
access protocols; integrated voice/data communication; multi-access systems; packet radio networks; spread spectrum communication; MAC protocol; RCMA; access collisions; channel reservation; data packet; dynamic reservation spread code; heavy collision; heavy load conditions; improved reservation code multiple access; integrated voice/data spread-spectrum system; local wireless communication; minislots; packet dropping; reservation code multiple access; system performance; Access protocols; Base stations; Computer simulation; Mobile communication; Scattering; Spread spectrum communication; System performance; Timing; Wireless application protocol; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797158
