Summary of WWW characterizations
WWW7 Proceedings of the seventh international conference on World Wide Web 7
A performance evaluation of hyper text transfer protocols
SIGMETRICS '99 Proceedings of the 1999 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Collaborative proxy system for distributed Web content transcoding
Proceedings of the ninth international conference on Information and knowledge management
Difficulties in simulating the internet
IEEE/ACM Transactions on Networking (TON)
Cluster Load Balancing for Fine-Grain Network Services
IPDPS '02 Proceedings of the 16th International Parallel and Distributed Processing Symposium
Efficient State Estimators for Load Control Policies in Scalable Web Server Clusters
COMPSAC '98 Proceedings of the 22nd International Computer Software and Applications Conference
Redirection Algorithms for Load Sharing in Distributed Web-server Systems
ICDCS '99 Proceedings of the 19th IEEE International Conference on Distributed Computing Systems
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Clustering provides a promising way to build a scalable, reliable, and high-performance WAP gateway architecture. However, this requires an efficient load balancing mechanism for assigning a request to a suitable gateway in the cluster, that can offer the best service. In addition, unpredictable connection time and nonuniformity of incoming load from different mobile clients are big obstacles to load balancing among real gateways. In this paper, we propose a load balancing strategy that has the following features: (1) estimating the potential load of real gateways with small computation time and no communication overhead, (2) asynchronous alarm sent when the utilization of a real gateway exceeds a critical threshold, and (3) WAP-awareness. We also propose a scalable WAP gateway (SWG) architecture that consists of a WAP dispatcher and a cluster of real gateways. The WAP dispatcher is a front-end distributor with our load balancing strategy. To prevent the WAP dispatcher from becoming a bottleneck, the WAP dispatcher distributes mobile clients' requests in kernel space and does not process outgoing gateway-to-client responses. Experiment results show that our SWG has better load balancing performance, throughput, and delay compared to the LVS and the Kannel gateway.