Title :
An FDD wideband CDMA MAC protocol for wireless multimedia networks
Author_Institution :
Broadband & Wireless Networking Lab., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
A medium access control (MAC) protocol is developed for wireless multimedia networks based on frequency division duplex (FDD) wideband code division multiple access (CDMA). In this protocol, the received power levels of simultaneously transmitting users are controlled by a minimum-power allocation algorithm such that the heterogeneous bit error rates (BERs) of multimedia traffic are guaranteed. With minimum-power allocation, a multimedia wideband CDMA generalized processor sharing (GPS) scheduling scheme is proposed. It provides fair queueing to multimedia traffic with different QoS constraints. It also takes into account the limited number of code channels for each user and the variable system capacity due to interference experienced by users in a CDMA network. The admission of real-time connections is determined by a new effective bandwidth connection admission control (CAC) algorithm in which the minimum-power allocation is also considered. Simulation results show that the new MAC protocol guarantees QoS requirements of both real-time and nonreal-time traffic in an FDD wideband CDMA network.
Keywords :
access protocols; broadband networks; code division multiple access; error statistics; frequency division multiplexing; multimedia communication; processor scheduling; quality of service; queueing theory; radio networks; telecommunication congestion control; BER; FDD wideband CDMA network; MAC protocol; QoS constraint; QoS requirement; code channel; effective bandwidth connection admission control algorithm; frequency division duplex wideband code division multiple access; heterogeneous bit error rate; medium access control; minimum-power allocation algorithm; multimedia traffic queueing; multimedia wideband CDMA generalized processor sharing scheduling scheme; nonreal-time traffic; real-time connection; real-time traffic; received power level; transmitting user; user interference; variable system capacity; wireless multimedia network; Access protocols; Bit error rate; Communication system traffic control; Frequency conversion; Global Positioning System; Media Access Protocol; Multiaccess communication; Traffic control; Wideband; Wireless application protocol;
Conference_Titel :
INFOCOM 2003. Twenty-Second Annual Joint Conference of the IEEE Computer and Communications. IEEE Societies
Print_ISBN :
0-7803-7752-4
DOI :
10.1109/INFCOM.2003.1208723
