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A novel software-defined networking approach for vertical handoff in heterogeneous wireless networks

机译：一种用于异构无线网络中垂直切换的软件定义网络方法

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摘要

We propose a novel vertical handoff scheme with the support of the software-defined networking technique for heterogeneous wireless networks. The proposed scheme solves two important issues in vertical handoff: network selection and handoff timing. In this paper, the network selection is formulated as a 0-1 integer programming problem, which maximizes the sum of channel capacities that handoff users can obtain from their new access points. After the network selection process is finished, a user will wait for a time period. Only if the new access point is consistently more appropriate than the current access point during this time period, will the user transfer its inter-network connection to the new access point. Our proposed scheme ensures that a user will transfer to the most appropriate access point at the most appropriate time. Comprehensive simulation has been conducted. It is shown that the proposed scheme reduces the number of vertical handoffs, maximizes the total throughput, and user served ratio significantly. Copyright (c) 2016 John Wiley & Sons, Ltd.
机译：我们在异构无线网络的软件定义网络技术的支持下提出了一种新颖的垂直切换方案。该方案解决了垂直切换中的两个重要问题：网络选择和切换定时。在本文中，网络选择被公式化为0-1整数规划问题，该问题使切换用户可以从其新接入点获得的信道容量总和最大化。网络选择过程完成后，用户将等待一段时间。仅在此时间段内新接入点始终比当前接入点更合适时，用户才会将其网络间连接转移到新接入点。我们提出的方案可确保用户将在最合适的时间转移到最合适的接入点。进行了全面的模拟。结果表明，所提出的方案减少了垂直切换的次数，最大程度地提高了总吞吐量，并显着提高了用户服务率。版权所有（c）2016 John Wiley＆Sons，Ltd.

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