WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
WCDMA for UMTS: Radio Access for Third Generation Mobile Communications
Radio Network Planning and Optimisation for Umts
Radio Network Planning and Optimisation for Umts
Automated planning of CPICH power allocation for enhancing HSDPA performance at cell edges
Mobility '07 Proceedings of the 4th international conference on mobile technology, applications, and systems and the 1st international symposium on Computer human interaction in mobile technology
Fast algorithm for large-scale UMTS coverage planning with soft handover consideration
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
WTS'09 Proceedings of the 2009 conference on Wireless Telecommunications Symposium
Pilot power protocol for autonomous infrastructure based multihop cellular networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
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Pilot power management is an important issue for efficient resource utilization in WCDMA networks. In this paper, we consider the problem of minimizing pilot power subject to a coverage constraint. The constraint can be used to model various levels of coverage requirement, among which full coverage is a special case. The pilot power minimization problem is NP-hard, as it generalizes the set covering problem. Our solution approach for this problem consists of mathematical programming models and methods.We present a linear-integer mathematical formulation for the problem. To solve the problem for large-scale networks, we propose a column generation method embedded into an iterative rounding procedure. We apply the proposed method to a range of test networks originated from realistic network planning scenarios, and compare the results to those obtained by two ad hoc approaches. The numerical experiments show that our algorithm is able to find near-optimal solutions with a reasonable amount of computing effort for large networks. Moreover, optimized pilot power considerably outperforms the ad hoc approaches, demonstrating that efficient pilot power management is an important component of radio resource optimization. As another part of our numerical study, we examine the trade-off between service coverage and pilot power consumption.