Download Combinatorial Optimization in Communication Networks by Maggie Xiaoyan Cheng, Yingshu Li, Ding-Zhu Du PDF

By Maggie Xiaoyan Cheng, Yingshu Li, Ding-Zhu Du

This booklet provides a entire presentation of state of the art examine in verbal exchange networks with a combinatorial optimization part. the target of the ebook is to increase and advertise the idea and purposes of combinatorial optimization in conversation networks. each one bankruptcy is written via knowledgeable facing theoretical, computational, or utilized features of combinatorial optimization.

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Combinatorial Optimization in Communication Networks

This booklet supplies a accomplished presentation of state-of-the-art examine in conversation networks with a combinatorial optimization part. the target of the ebook is to increase and advertise the idea and functions of combinatorial optimization in verbal exchange networks. each one bankruptcy is written via a professional facing theoretical, computational, or utilized points of combinatorial optimization.

Extra info for Combinatorial Optimization in Communication Networks

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Vidyarthi, A. Ngom, and I. Stojmenovid number of channels used in cell i. This vector can be obtained by analyzing the traffic at each cell. In reality, the value of T should be a function of time due to arrival of new calls, termination of ongoing calls, and handovers. The process of channel assignment must satisfy the EMC constraints and the demand of channels in a cell. These constraints are also known as hard constraints. This requires a proper channel assignment scheme. The channel assignment problem has been shown to be NP-hard [32].

The Multiple Access Technique (MAT) allows many users to share the common transmission resource, the radio spectrum, without causing interference between users. A good MAT can improve the system capacity. Different types of cellular systems employ various methods of multiple accesses. The traditional analog cellular systems, such as AMPS and TACS standards, use Erequency Division Multiple Access (FDMA). With FDMA, the available spectrum is divided into a number of radio channels of a specified bandwidth, and a selection of these channels is used within a given cell.

W ~ - ~where ) , wi E V ( F 1 )- { v l ,v 2 ) . This is obviously true if ( v l ,v 2 ) is an edge in F. Therefore, we only consider the case where there is no edge from vl to v2 in F. Since F is k-connected, IS,,,, ( F )I k. , sl = I{p E S,,,, ( F ' ) : 3w E W ,w E p) 1. Because the paths in S,, ,,( F ' ) are pairwise-vertex-disjoint, the removal of any one vertex in W breaks at most one path in the set. Given I WI = k - 1, we have sl 5 k - 1. , vl is still connected to vz in F". Now we consider the case where IS,,,, (F1)I< k.

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