Title :
Wide-band TD-CDMA MAC with minimum-power allocation and rate- and BER-scheduling for wireless multimedia networks
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
A wide-band time-division-code-division multiple-access (TD-CDMA) medium access control (MAC) protocol is introduced in this paper. A new minimum-power allocation algorithm is developed to minimize the interference experienced by a code channel such that heterogeneous bit-error rate (BER) requirements of multimedia traffic are satisfied. Further, from analysis of the maximum capacity of a time slot, it is concluded that both rate and BER scheduling are necessary to reach a maximum capacity. Based on the new minimum-power allocation algorithm as well as on rate and BER scheduling concepts, a new scheduling scheme is proposed to serve packets with heterogeneous BER and quality of service (QoS) requirements in different time slots. To further enhance the performance of the MAC protocol, an effective connection admission control (CAC) algorithm is developed based on the new minimum-power allocation algorithm. Simulation results show that the new wide-band TD-CDMA MAC protocol satisfies the QoS requirements of multimedia traffic and achieves high overall system throughput.
Keywords :
access protocols; broadband networks; channel coding; code division multiple access; error statistics; interference suppression; minimisation; multimedia communication; packet radio networks; quality of service; radiofrequency interference; scheduling; telecommunication channels; telecommunication congestion control; telecommunication traffic; time division multiple access; BER scheduling; QoS; bit error rate; code channel; code division multiple access; connection admission control algorithm; interference minimization; medium access control protocol; minimum-power allocation; multimedia traffic; quality of service; rate-scheduling; time division multiple access; time slot maximum capacity; wideband TD-CDMA MAC; wireless multimedia networks; Access protocols; Admission control; Bit error rate; Communication system traffic control; Interference; Media Access Protocol; Multimedia systems; Quality of service; Scheduling algorithm; Wideband;
Journal_Title :
Networking, IEEE/ACM Transactions on
DOI :
10.1109/TNET.2003.822663
