Uplink CDMA systems with diverse QoS guarantees for heterogeneous traffic
MobiCom '97 Proceedings of the 3rd annual ACM/IEEE international conference on Mobile computing and networking
Comparative analysis of wireless ATM channel access protocols supporting multimedia traffic
Mobile Networks and Applications - Special issue on wireless LANs
A slotted CDMA protocol with BER scheduling for wireless multimedia networks
IEEE/ACM Transactions on Networking (TON)
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In a wireless packet (e.g., ATM) network that supports an integrated mix of multamedia traffic, a large variety of mobiles with different service rates will need to be accommodated efficiently in a bandwidth-on-demand fair-sharing manner. In this paper, we propose and study Multi-Code CDMA (MC-CDMA) with Distributed-Queueing Request Update Multiple Access (DQR UMA) for multi-rate wireless packet networks. The network incorporates MC-CD MA (a flexible multiplexing scheme for providing multi-rate packet transmissions) and DQRUMA (an eficient demand-assignment multiple access protocol for wireless access and schedulang) to form a unified bandwidth-on-demand fair-sharing platform for multi-rate wireless services. A slot-by-slot packet transmit scheduling policy provides the possibility of slot-by-slot allocation of Pseudo-Noise (PN) codes (primary codes) and optimal power levels to the mobiles involved in packet transmissions. Also, a Maximum Capacity Power Allocation (MCPA) criterion is derived to exploit the subcode concatenation property of the MC-CDMA transmission. Simulation results show that the system provides close to ideal-access performance for multi-rate mobiles, both with homogeneous trafic charaderistics and with a mix of heterogeneous traffic characteristics.