论文标题
为移动用户的偏好设计和分析Wi-Fi数据卸载策略
Designing and Analysis of A Wi-Fi Data Offloading Strategy Catering for the Preference of Mobile Users
论文作者
论文摘要
近年来，通过Wi-Fi卸载移动流量已成为降低移动用户的通信成本的潜在解决方案。用户希望通过Wi-Fi卸载来降低成本，同时将延迟保持在可接受的范围内。同样，不同的用户对成本和延迟性能具有不同的敏感性。如何根据用户的喜好进行适当的成本延迟权衡是设计策略设计的关键问题。为了解决这个问题，我们为当前商业终端提出了面向偏好的卸载策略，该策略仅通过一个通道同时传输流量。我们将策略建模为三态M/mmsp/1排队系统，其中服务过程是Markov调制服务过程（MMSP），并通过建立混合嵌入式Markov链来获得结构化解决方案。我们的分析表明，鉴于用户的偏好，存在最佳截止日期以最大化实用程序，该截止日期定义为成本和延迟的线性组合。我们还提供了选择最佳截止日期的方法。我们的模拟表明，具有最佳截止日期的策略可以实现良好的性能。
In recent years, offloading mobile traffic through Wi-Fi has emerged as a potential solution to lower down the communication cost for mobile users. Users hope to reduce the cost while keeping the delay in an acceptable range through Wi-Fi offloading. Also, different users have different sensitivities to the cost and the delay performance. How to make a proper cost-delay tradeoff according to the user's preference is the key issue in the design of the offloading strategy. To address this issue, we propose a preference-oriented offloading strategy for current commercial terminals, which transmit traffic only via one channel simultaneously. We model the strategy as a three-state M/MMSP/1 queueing system, of which the service process is a Markov modulated service process (MMSP), and obtain the structured solutions by establishing a hybrid embedded Markov chain. Our analysis shows that, given the user's preference, there exists an optimal deadline to maximize the utility, which is defined as the linear combination of the cost and the delay. We also provide a method to select the optimal deadline. Our simulation demonstrates that this strategy with the optimal deadline can achieve a good performance.
