A prioritized real-time wireless call degradation framework for optimal call mix selection
Mobile Networks and Applications - Analysis and Design of Multi-Service Wireless Networks
Wcdma for Umts
Code Placement and Replacement Strategies for Wideband CDMA OVSF Code Tree Management
IEEE Transactions on Mobile Computing
Radio Resource Management for Cellular CDMA Systems Supporting Heterogeneous Services
IEEE Transactions on Mobile Computing
MSWIM '03 Proceedings of the 6th ACM international workshop on Modeling analysis and simulation of wireless and mobile systems
IEEE Transactions on Mobile Computing
Fair and efficient scheduling for UMTS forward link: Research Articles
International Journal of Communication Systems
Design and Analysis of Time-Based Code Allocation Schemes in W-CDMA Systems
IEEE Transactions on Mobile Computing
Code Placement and Replacement Schemes for WCDMA Rotated-OVSF Code Tree Management
IEEE Transactions on Mobile Computing
IEEE Transactions on Mobile Computing
Optimization of base stations positioning in mobile networks
ICCSA'06 Proceedings of the 2006 international conference on Computational Science and Its Applications - Volume Part II
Planning UMTS base station location: optimization models with power control and algorithms
IEEE Transactions on Wireless Communications
Maximally flexible assignment of orthogonal variable spreading factor codes for multirate traffic
IEEE Transactions on Wireless Communications
A tree partitioning dynamic policy for OVSF codes assignment in wideband CDMA
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Non-blocking OVSF codes and enhancing network capacity for 3G wireless and beyond systems
Computer Communications
Dynamic assignment of orthogonal variable-spreading-factor codes in W-CDMA
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Supporting rate guarantee and fair access for bursty data traffic in W-CDMA
IEEE Journal on Selected Areas in Communications
Credit-based slot allocation for multimedia mobile ad hoc networks
IEEE Journal on Selected Areas in Communications
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This paper presents a novel class-based fair code allocation (CFCA) protocol to support delay and rate guarantees for realtime flows and to provide fairness for non-real-time flows on the downlink of WCDMA- and VSF-OFCDM-based cellular networks. CFCA not only assigns bandwidth dynamically to different flows but also determines those appropriate OVSF codes whose assignment results in the minimum overhead for code reassignments during dynamic bandwidth allocation. To reduce the overhead of code reassignments, this paper introduces the concept of affinity-mate and enables bandwidth allocation and code placement to interact with each other. A new performance metric, called class-based rate degradation ratio (CRD), is introduced to ensure fairness in providing rate and delay guarantees by measuring the rate degradations of flows based on their traffic types. The simulation results show that code reassignment overhead can be reduced by up to 60% for high network loads. For low network loads, fairness is achieved fully, but for high network loads the average rate requirement is met fairly for 95% of the flows.