Title :
Capacity analysis of an integrated voice/data DS-CDMA network
Author :
Manji, Salim ; Zhuang, Weihua
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
This paper proposes a packetized direct sequence code division multiple access (DS-CDMA) system model that supports integrated voice and data traffic in a slowly Rayleigh fading environment and allows for seamless interfacing to an asynchronous transfer mode (ATM) broadband network. Forward error correction (FEC) coding and an automatic retransmission request (ARQ) protocol are applied to data packets. A queueing model is used for servicing data transmission requests. The reverse link power control utilizes a closed loop algorithm with channel estimation. A one-bit power control command is used for delay insensitive data packets and a two-bit command for delay sensitive voice packets. The cell capacity for data users is analyzed and is extended to include voice users by assigning a fixed number of DS-CDMA channels for data traffic and using all the remaining resources for voice traffic. It is shown that there is a linear relation between the capacity for data users and that for voice users
Keywords :
Rayleigh channels; asynchronous transfer mode; automatic repeat request; broadband networks; channel capacity; closed loop systems; code division multiple access; data communication; error correction codes; estimation theory; fading; forward error correction; land mobile radio; personal communication networks; power control; protocols; queueing theory; spread spectrum communication; voice communication; ARQ protocol; ATM; FEC; asynchronous transfer mode broadband network; automatic retransmission request; capacity analysis; cell capacity; channel estimation; closed loop algorithm; data traffic; data transmission requests; delay insensitive data packets; delay sensitive voice packets; forward error correction coding; integrated voice/data DS-CDMA network; one-bit power control command; packetized direct sequence code division multiple access system model; queueing model; reverse link power control; seamless interfacing; slowly Rayleigh fading environment; Asynchronous transfer mode; Delay; Direct-sequence code-division multiple access; Forward error correction; Multiaccess communication; Power control; Rayleigh channels; Speech analysis; Telecommunication traffic; Traffic control;
Conference_Titel :
Communications, 1997. ICC '97 Montreal, Towards the Knowledge Millennium. 1997 IEEE International Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3925-8
DOI :
10.1109/ICC.1997.610025
