Optimality of greedy power control and variable spreading gain in multi-class CDMA mobile networks
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
Distributed admission control for power-controlled cellular wireless systems
IEEE/ACM Transactions on Networking (TON)
Multimedia support for wireless W-CDMA with dynamic spreading
Wireless Networks
Resource control for elastic traffic in CDMA networks
Proceedings of the 8th annual international conference on Mobile computing and networking
A framework for performance evaluation and optimization of an emerging multimedia DS-CDMA network
WOWMOM '01 Proceedings of the 4th ACM international workshop on Wireless mobile multimedia
Service curve assurances versus uplink throughput in CDMA networks
WOWMOM '01 Proceedings of the 4th ACM international workshop on Wireless mobile multimedia
Bursty traffic over CDMA: predictive MAI temporal structure, rate control and admission control
Computer Networks: The International Journal of Computer and Telecommunications Networking
Towards mean field theory of wireless networks
ACM SIGMETRICS Performance Evaluation Review - Special issue on the fifth workshop on MAthematical performance Modeling and Analysis (MAMA 2003)
A scalable model for channel access protocols in multihop ad hoc networks
Proceedings of the 10th annual international conference on Mobile computing and networking
IEEE Transactions on Mobile Computing
Closed-loop architecture and protocols for rapid dynamic spreading gain adaptation in CDMA networks
IEEE/ACM Transactions on Networking (TON)
Link adaptation for framed multimedia data transmission over a DS-CDMA communication system
EURASIP Journal on Applied Signal Processing
The impact of code allocation on the multiple access interference in WCDMA systems
Computer Communications
Exploiting mobility diversity in rate adaptive CDMA networks
Computers and Electrical Engineering
Computers and Electrical Engineering
Optimal rate and power allocation in uplink packet CDMA transmission
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
On the throughput gain for rapid dynamic symbol duration adaptation within discrete duration sets
ISCIT'09 Proceedings of the 9th international conference on Communications and information technologies
Fairness and Throughput Trade-Off Analysis for UMTS WCDMA Network Planning
Wireless Personal Communications: An International Journal
Quality of service (QoS) issues in multimedia wireless network: a survey
Journal of Mobile Multimedia
QoS guarantees in multimedia CDMA wireless systems with non-precise network parameter estimates
IWQoS'05 Proceedings of the 13th international conference on Quality of Service
Power control and capacity of spread spectrum wireless networks
Automatica (Journal of IFAC)
The effect of spreading gain control on a CDMA slotted ALOHA system
Computer Communications
Multi-rate control policies for elastic traffic in CDMA networks
Performance Evaluation
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In this paper, we consider a direct-sequence code division multiple access (DS-CDMA) network consisting of a single radio access point and a collection of wireless terminals. The network offers two classes of service: class-1 (real-time) and class-2 (reliable). We are interested in studying the effect of dynamic spreading gain control (SGC) on the dynamics of multiple access interference (MAI), spectral efficiency, and the quality of service (QoS) experienced by each service class. We first consider a time-slotted system in which class-2 terminals operate in a random access fashion. We show that under optimal (throughput maximizing) dynamic SGC: (1) the optimal retransmission probability is equal to one, and (2) the optimal spreading gain increases linearly, or equivalently, the transmission rate decreases inverse linearly, as the MAI level increases. We then model the system as a continuous-time finite-source queueing system with processor sharing, and obtain an explicit (closed-form) expression for the stationary distribution of the number of active class-1 and class-2 terminals, that is, the MAI level. This distribution is used to derive expressions for various QoS measures and define a capacity or admissible region. The results obtained by simulation and analysis are in extremely close agreement. This work contributes to a better understanding of the relationships between QoS, multiple access interference, and allocation of radio resources in DS-CDMA networks