A Cloud Evolution Based Handoff Decision Scheme with ABC Supported

With wireless access technologies maturing, the wireless network environments have a characteristic of multiple networks overlapping, called heterogeneous wireless networks. As a key procedure of the always best connected (ABC) concept, handoff decision s

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Abstract With wireless access technologies maturing, the wireless network environments have a characteristic of multiple networks overlapping, called heterogeneous wireless networks. As a key procedure of the always best connected (ABC) concept, handoff decision schemes need to consider with plenty of factors. Based on the game analysis and a cloud evolution algorithm, it is proposed that a cloud evolution-based handoff decision scheme with ABC supported to maximize user utility and network provider utility. Simulation results show that this scheme can search the optimal solution efficiently and has good performance.





Keywords Wireless networks Always best connected (ABC) Handoff decision Cloud evolution algorithm User utility Network provider utility







1 Introduction The access network technologies have been rapidly developed, and 2, 2.5, 3 and 4G networks appear. And they constitute heterogeneous access networks with plenty of networks overlapping at the same time. With the support of Software defined radio (SDR) and multimode intelligent terminals, it becomes the core issue for heterogeneous access networks that the Always Best Connected (ABC) concept [1] allows an application to connect with any network anywhere and anytime. And ABC supporting handoff technologies insures the application Quality of service (QoS) and the seamless roaming [2] for users among a multitude of access network technologies. But it is difficult for users to describe QoS requirements accurately, and QoS requirements have strong fuzziness [3]. In addition, handoff decision C.-B. Zhang (&)  X.-W. Wang  M. Huang College of Information Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, China e-mail: [email protected]

Z. Wen and T. Li (eds.), Practical Applications of Intelligent Systems, Advances in Intelligent Systems and Computing 279, DOI: 10.1007/978-3-642-54927-4_11,  Springer-Verlag Berlin Heidelberg 2014

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schemes need to ensure that terminals have reasonable dwell time for each decision, so as to prevent terminals from frequent handoffs. On this base, we think that handoff decision schemes should consider with the will of users and network providers besides many internal factors. Some existing algorithms [4, 5] made handoff decisions to decrease the probabilities of handoff dropping, call blocking, and frequent handoffs. Some algorithms [6, 7] considered with some factors, such as Received signal strength (RSS), load balancing, bandwidths, delay, service types, service prices, terminal velocities, power, and user preferences to select the better wireless access technology. However, network environments and influence factors of ABC supporting handoff schemes are not considered comprehensively at the same time in these schemes. The most important thing is that they do not make users and access network providers achieve the win–win situation. So we propose a handoff decision scheme with ABC supported. This scheme should consider with application types, QoS requi