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Optimized traffic flow assignment in multi-homed, multi-radio mobile hosts

机译：在多宿主，多无线电移动主机中优化流量分配

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摘要

Multi-radio mobile communication devices are increasingly gaining market share due to the diversity of currently deployed and continuously emerging radio access technologies. Multi-homing support in multi-radio terminals, i.e., simultaneous use of two or more radio interfaces, provides improved user experience through increase in available bandwidth capacity and reliability of wireless access. Furthermore, optimized assignment of applica?tion traffic flows to available interfaces and radio access bearer services contributes to eco?nomic and power consumption efficiency. We study the problem of traffic flow assignment in a mobile node, multi-homed through a set of different technology radio interfaces. We provide an analytical formulation for the problem and prove its hardness through transfor?mation from the Multiple Knapsack Problem with Assignment Restrictions. Problem solu?tions are approximated with a heuristic algorithm that is based on local search and is characterized by efficient execution times for a wide set of realistic problem sizes. The quality of approximation is rather satisfactory and is evaluated through comparison of heu?ristic and exact solutions for a large set of randomly generated problem instances. More?over, an evaluation of the approach through simulation supports these findings and provides an estimation of the associated mobility management overhead that is limited and allows real deployment of the decision mechanism.
机译：由于当前部署的和不断涌现的无线电接入技术的多样性，多无线电移动通信设备正在日益获得市场份额。在多无线电终端中的多归属支持，即同时使用两个或多个无线电接口，通过增加可用带宽容量和无线接入的可靠性，提供了改善的用户体验。此外，优化将应用业务流分配给可用接口和无线电接入承载服务有助于提高经济性和功耗效率。我们研究了通过一组不同的技术无线电接口进行多宿主的移动节点中的流量分配问题。我们提供了该问题的分析公式，并通过具有分配限制的多重背包问题的转化来证明其硬度。使用基于本地搜索的启发式算法来近似解决问题，该算法的特点是对各种实际问题的大小有效执行时间。近似质量相当令人满意，并且通过比较大量随机产生的问题实例的启发式和精确解进行评估。此外，通过仿真对方法进行评估可以支持这些发现，并提供对相关联的移动性管理开销的估计，该开销有限，并且可以真正部署决策机制。

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