Combinatorial optimization: algorithms and complexity
Combinatorial optimization: algorithms and complexity
Fair end-to-end window-based congestion control
IEEE/ACM Transactions on Networking (TON)
A distributed load balancing algorithm for the hot cell problem in cellular mobile networks
HPDC '97 Proceedings of the 6th IEEE International Symposium on High Performance Distributed Computing
Wireless downlink data channels: user performance and cell dimensioning
Proceedings of the 9th annual international conference on Mobile computing and networking
User-level performance of channel-aware scheduling algorithms in wireless data networks
IEEE/ACM Transactions on Networking (TON)
A flexible downlink scheduling scheme in cellular packet data systems
IEEE Transactions on Wireless Communications
Opportunistic beamforming using dumb antennas
IEEE Transactions on Information Theory
CDMA/HDR: a bandwidth efficient high speed wireless data service for nomadic users
IEEE Communications Magazine
Providing quality of service over a shared wireless link
IEEE Communications Magazine
Distributed call admission control in mobile/wireless networks
IEEE Journal on Selected Areas in Communications
Opportunistic transmission scheduling with resource-sharing constraints in wireless networks
IEEE Journal on Selected Areas in Communications
Fundamental design issues for the future Internet
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Cell Breathing in Wireless LANs: Algorithms and Evaluation
IEEE Transactions on Mobile Computing
Differentiated TCP User Perception over Downlink Packet Data Cellular Systems
IEEE Transactions on Mobile Computing
An optimal station association policy for multi-rate ieee 802.11 wireless lans
Proceedings of the 10th ACM Symposium on Modeling, analysis, and simulation of wireless and mobile systems
Scheduler design for heterogeneous traffic in cellular networks with multiple channels
WICON '07 Proceedings of the 3rd international conference on Wireless internet
Distributed Approximation of Cellular Coverage
OPODIS '08 Proceedings of the 12th International Conference on Principles of Distributed Systems
Dynamic association for load balancing and interference avoidance in multi-cell networks
IEEE Transactions on Wireless Communications
Joint network-wide opportunistic scheduling and power control in multi-cell networks
IEEE Transactions on Wireless Communications
User Association to Optimize Flow Level Performance in Wireless Systems with Dynamic Interference
NET-COOP '09 Proceedings of the 3rd Euro-NF Conference on Network Control and Optimization
Adaptive multi-pattern reuse in multi-cell networks
WiOPT'09 Proceedings of the 7th international conference on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
Distributed dynamic load balancing in wireless networks
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
MPCP assisted power control and performance of cell breathing in integrated EPON-WiMAX network
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
α-optimal user association and cell load balancing in wireless networks
INFOCOM'10 Proceedings of the 29th conference on Information communications
Breathe to stay cool: adjusting cell sizes to reduce energy consumption
Proceedings of the first ACM SIGCOMM workshop on Green networking
Distributed approximation of cellular coverage
Journal of Parallel and Distributed Computing
Distributed α-optimal user association and cell load balancing in wireless networks
IEEE/ACM Transactions on Networking (TON)
Practical adaptive user association policies for wireless systems with dynamic interference
IEEE/ACM Transactions on Networking (TON)
Dynamic multiagent load balancing using distributed constraint optimization techniques
Web Intelligence and Agent Systems
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We investigate a wireless system of multiple cells, each having a downlink shared channel in support of high-speed packet data services. In practice, such a system consists of hierarchically organized entities including a central server, Base Stations (BSs), and Mobile Stations (MSs). Our goal is to improve global resource utilization and reduce regional congestion given asymmetric arrivals and departures of mobile users. For this purpose, we propose a scalable cross-layer framework to coordinate packet-level scheduling, call-level cell-site selection and handoff, and system-level loading balancing based on load, throughput, and channel measurements at different layers. In this framework, an opportunistic scheduling algorithm---the weighted Alpha-Rule---exploits multiuser diversity gain in each cell independently, trading aggregate (mean) downlink throughput for fairness and minimum rate guarantees among MSs. Each MS adapts to its channel dynamics and the load fluctuations in neighboring cells, in accordance with MSs' mobility and their arrivals or departures, by initiating load-aware handoff and cell-site selection. The central server adjusts the scheduling parameters of each cell to coordinate cells' coverage, or cell breathing, by prompting distributed MS handoffs. Across the whole system, BSs and MSs constantly monitor their load, throughput, or channel quality in order to facilitate the overall system coordination.Our specific contributions in such a framework are highlighted by the minimum-rate guaranteed Weighted Alpha-Rule scheduling, the load-aware MS handoff/cell-site selection, and the Media Access Control (MAC)-layer cell breathing. Our evaluations show that the proposed framework can improve the global resource utilization and load balancing, which translates into a smaller blocking rate of MS arrivals without extra resources, while the aggregate throughput remains roughly the same or improved around the hot-spots. Our tests also show that the coordinated system is robust to dynamic load fluctuations and is scalable to both system size and MS population.