Download e-book for iPad: Applications of resource optimization in wireless networks by Patrik Björklund.

By Patrik Björklund.

ISBN-10: 9185523410

ISBN-13: 9789185523412

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G. a halving of the network load gives a gain of 3 dB. No loading gain is achieved in a non hopping network since no averaging of interference of the different frequencies occurs. A non hopping network must be considered for a worst case scenario. The other part corresponds to the coding scheme used, and the coding becomes much more efficient with lower loads, leading to a fractional loading gain [141, 143, 149]. 3 Frequency Hopping Strategies FH can be performed in two different ways, cyclic mode or random mode.

A FAP related to the minimum span problem is minimum order FAP. Instead of minimizing the span of frequencies, the number of frequencies is minimized. The minimum blocking and minimum interference FAP use a fixed span of frequencies. In the minimum blocking FAP, the goal is to assign frequencies in such a way that the overall blocking probability of the network is minimized. The FAP that is in focus of this thesis, is the minimum interference problem. All the frequencies in a telecom operators spectra are assumed to be used in the frequency assignment.

Hence, the FAP can be considered as two problems, one for the TCH and one for the BCCH. The minimum interference FAP can be stated as follows: Given a list of TRXs and a frequency spectrum, a list of feasible frequencies for each TRX, co-channel and adjacent channel interference matrices and separation requirements for each pair of TRXs. The problem is to assign exactly one frequency to each TRX such that no requirements are violated and the total cumulative interference is minimized. t. 4) The variables in the FAP model are: xip = 1 0 if frequency i is assigned to TRX p otherwise.

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Applications of resource optimization in wireless networks by Patrik Björklund.


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