Title :
Power control and capacity analysis for a packetized indoor multimedia DS-CDMA network
Author :
Manji, Salim ; Zhuang, Weihua
Author_Institution :
Wireless Inf. Network Lab., Rutgers Univ., Piscataway, NJ, USA
fDate :
5/1/2000 12:00:00 AM
Abstract :
This paper proposes a packetized indoor wireless system using direct-sequence code-division multiple-access (DS-CDMA) protocol. The indoor radio environment is characterized by slow Rayleigh fading with or without lognormal shadowing. The system supports multimedia services with various transmission rates and quality of service (QoS) requirements and allows for seamless interfacing to asynchronous transfer mode (ATM) broadband networks. All packets are transmitted with forward error correction (FEC) using convolutional code for voice packets and Bose-Chaudhuri-Hocquenghem (BCH) code for data packets with an automatic retransmission request (ARQ) protocol and for video packets without ARQ. A queueing model is used for servicing data transmission requests. A power control algorithm is proposed for the system, which combines closed-loop power control with channel estimation to give the best performance. The cell capacity of each traffic type and various multimedia traffic configurations in both single-cell and multiple-cell networks are evaluated theoretically under the assumption of perfect power control. The effect of power control imperfection on the capacity using the proposed power control algorithm is investigated by computer simulation
Keywords :
BCH codes; Rayleigh channels; asynchronous transfer mode; automatic repeat request; broadband networks; cellular radio; channel capacity; closed loop systems; code division multiple access; digital simulation; forward error correction; indoor radio; multimedia communication; multiuser channels; packet radio networks; personal communication networks; power control; quality of service; queueing theory; spread spectrum communication; telecommunication control; telecommunication traffic; ARQ protocol; ATM broadband networks; Bose-Chaudhuri-Hocquenghem code; DS-CDMA protocol; FEC; PCN; QoS requirements; asynchronous transfer mode; automatic retransmission request; capacity analysis; cell capacity; channel estimation; closed-loop power control; computer simulation; convolutional code; data packets; data transmission requests; direct-sequence code-division multiple-access; forward error correction; lognormal shadowing; multimedia services; multimedia traffic configurations; multiple-cell network; packet transmission; packetized indoor multimedia DS-CDMA network; packetized indoor wireless system; perfect power control; performance; personal communication networks; power control algorithm; quality of service; queueing model; single-cell network; slow Rayleigh fading; transmission rates; video packets; voice packets; Asynchronous transfer mode; Automatic repeat request; Communication system traffic control; Forward error correction; Indoor radio communication; Multiaccess communication; Power control; Quality of service; Traffic control; Wireless application protocol;
Journal_Title :
Vehicular Technology, IEEE Transactions on
