Optimum positioning of base stations for cellular radio networks
Wireless Networks
Computers and Intractability: A Guide to the Theory of NP-Completeness
Computers and Intractability: A Guide to the Theory of NP-Completeness
Introduction to Operations Research and Revised CD-ROM 8
Introduction to Operations Research and Revised CD-ROM 8
Dynamic bandwidth allocation for Internet telephony
Computer Communications
Comparative analysis of traditional telephone and voice-over-Internet protocol (VoIP) systems
ISEE '04 Proceedings of the International Symposium on Electronics and the Environment
Assessing the risk of intercepting VoIP calls
Computer Networks: The International Journal of Computer and Telecommunications Networking
A gateway placement algorithm in wireless mesh networks
WICON '07 Proceedings of the 3rd international conference on Wireless internet
Computer Networks: The International Journal of Computer and Telecommunications Networking
VoIP: A comprehensive survey on a promising technology
Computer Networks: The International Journal of Computer and Telecommunications Networking
Video-on-demand server selection and placement
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
IEEE Transactions on Systems, Man, and Cybernetics, Part C: Applications and Reviews
A multiplexing scheme for H.323 voice-over-IP applications
IEEE Journal on Selected Areas in Communications
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Internet telephony is promising for long-distance calls. To serve the general public, a service provider can operate a telephone gateway in each servicing city to bridge the local telephone network and the Internet, so that users can use telephones or mobile phones to access these telephone gateways for long-distance calls. The service provider should serve many cities to attain good service coverage but it is costly to operate telephone gateways in all of these cities. In this paper, we propose a sparse telephone gateway configuration to serve many cities cost-effectively. Using this configuration, if the service provider serves N cities, it operates telephone gateways in only M cities where M