Abstract
In this paper, a novel multilink selection framework is developed for different applications with various quality of service (QoS) requirements in avionic systems, based on the multi-attribute decision-making model. Two metaheuristic algorithms are proposed to solve this model while optimizing the multilink selection performances. Multilink configuration and multi-homing capabilities are generally required for aircrafts operating in a heterogeneous wireless network environment. The first algorithm, called Analytic Hierarchy Process and Simulated Annealing (AHP-SA), utilizes a two-phase process. In Phase one, an analytic hierarchy process (AHP) is used to choose the decision weight factors. Then, in Phase two, a simulated annealing process is applied to select suitable networks, for various service requests, based on the weights obtained from first phase. Further, to improve customer satisfaction, Simulated Annealing algorithm for Simultaneous Weights and Network Selection Optimisation (SA-SWNO) is developed, in which a simulated annealing algorithm is applied to dynamically optimize weight factors of objective functions and the request-to-network assignment matrix. Simulation results demonstrate that both proposed algorithms outperform the commonly used price-based or QoS-based network selection scheme with much higher averaged satisfaction degree and lower computational complexity.
Highlights
The purpose of network selection in the aeronautical environment is to ensure the always best connection for aircrafts, i.e., to guarantee the aircrafts to access the most suitable, reliable, secure and fast data communication network according to their requirements
0 d dthres dthres d dmax (2c) where d denotes the delay of the access network, dmax represents the upper bound of the Aeronautical Communication Services (ACSs) delay requirements, dthres = dmax/2, and γd ≥ 2 is the tuned parameter showing the steepness of the function
0 c cthres cthres c cmax where c denotes the packet loss rate of the access network, cmax represents the upper bound of the ACS cost requirements, cthres = cmax/2, and γc ≥ 2 is the tuned parameter showing the steepness of the function
Summary
The purpose of network selection in the aeronautical environment is to ensure the always best connection for aircrafts, i.e., to guarantee the aircrafts to access the most suitable, reliable, secure and fast data communication network according to their requirements. A good network selection scheme can efficiently improve the degree of satisfaction and quality of experience of aircrafts and effectively reduce access failures. It is a challenge for these aircrafts to select an optimal access network. Two simulated annealing (SA) based algorithms are considered: Analytic Hierarchy Process and Simulated Annealing (AHP-SA) and Simultaneous Weights and Network Selection Optimisation (SA-SWNO) algorithm. Both algorithms take advantage of the benefits of simulated annealing for global optimisation to select the most optimum link based on multiple network attributes.
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