DIALM '01 Proceedings of the 5th international workshop on Discrete algorithms and methods for mobile computing and communications
A survey of very large-scale neighborhood search techniques
Discrete Applied Mathematics
Base Station Location and Service Assignments in W--CDMA Networks
INFORMS Journal on Computing
Optimisation models for GSM radio
International Journal of Mobile Network Design and Innovation
GUB Covers and Power-Indexed Formulations for Wireless Network Design
Management Science
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Transmitters and receivers are the basic elements of wireless networks and are characterized by a number of radio-electrical parameters. The generic planning problem consists of establishing suitable values for these parameters so as to optimize some network performance indicator. The version here addressed, namely the Power Assignment Problem (pap), is the problem of assigning transmission powers to the transmitters of a wireless network so as to maximize the satisfied demand. This problem has relevant practical applications both in radio-broadcasting and in mobile telephony. Typical solution approaches make use of mixed integer linear programs with huge coefficients in the constraint matrix yielding numerical inaccuracy and poor bounds, and so cannot be exploited to solve large instances of practical interest. In order to overcome these inconveniences, we developed a two-phase heuristic to solve large instances of pap, namely a constructive heuristic followed by an improving local search. Both phases are based on successive shortest path computations on suitable directed graphs. Computational tests on a number of instances arising in the design of the national Italian Digital Video Broadcasting (DVB) network are presented.