Managing Cross-Border Cellular Networks Interference via Game Theorybased Spectrum Sharing
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Date
2018-11-16
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AAU
Abstract
The need for wireless services and high data rate is growing rapidly as a result
of development of communication technologies. The challenges for operators to
meet this rising demand of high data rates is radio spectrum which is a scarce
and expensive resources. This scarcity arises from the exclusive allocation of the
available spectrum relatively from the physical scarcity and has inefficiency in
bandwidth usage. To improve capacity and Quality of Service (QoS), it is essential
to pay closer attention in increasing operational bandwidth.
The viable option to increase this operational bandwidth is spectrum sharing between
operators. It refers to the common uses of a specific range of spectrum
simultaneously by operators operating in the same geographical area. However,
the main problem in operating with same frequency bands without coordination
causes inter-operator or Cross-Border Interference (CBI). The mitigation techniques
currently working for managing this type of interference is the physical and logical
parameter optimization which is not effective.
In this thesis, an efficient approach of dynamic spectrum sharing among operators
is proposed to alleviate this problem. The basic idea is to partition the available
spectrum into private and shared frequency bands by exchanging spectrum usage
favors from the common pool to minimize interference. We address this issue for
two operators’ spectrum sharing operating in the same geographical area.
Most of the mathematical models considered all over this thesis are based on
the Game theory to model and analyze their competitive interactions. A strategic
non-cooperative game is modeled to maximize throughput, where the operators
simultaneously share the available spectrum dynamically as per their relative requirement.
Finally, based on the simulations, the expected results of the proposed
schemes outperforms the existing Fixed Spectrum Access (FSA) schemes under
varying load factors.
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Keywords
Game Theory, Dynamic Spectrum Sharing, Non-cooperative Game, Cross-border Interference