An examination of the benefits of scalable TTI for heterogeneous traffic management in 5G networks
An examination of the benefits of scalable TTI for heterogeneous traffic management in 5G networks
复制标题
检查可扩展 TTI 对 5G 网络异构流量管理的优势
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
D. Yuan
中科院分区：
文献类型：
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作者：
Emmanouil Fountoulakis;N. Pappas;Qi Liao;V. Suryaprakash;D. Yuan
互联设备的数量和种类的快速增长需要5G无线系统来应对非常不同的流量混合。因此，当需要同时服务不同类型的业务时，在传输期间使用固定传输时间间隔(TTI)不一定是最有效的方法。该工作分析了基于可扩展TTI的调度的好处，其中信道分配和TTI持续时间根据不同服务的截止期和需求进行调整。我们通过考虑个体服务需求来描述一个优化问题。然后，我们证明了该优化问题是NP难的，并给出了一个启发式算法，为该问题提供了一个有效的解。数值结果表明，该算法能够找到满足任务关键型通信服务延迟要求的近似最优解，同时为移动宽带服务提供了良好的吞吐量性能。
The rapid growth in the number and variety of connected devices requires 5G wireless systems to cope with a very heterogeneous traffic mix. As a consequence, the use of a fixed transmission time interval (TTI) during transmission is not necessarily the most efficacious method when heterogeneous traffic types need to be simultaneously serviced. This work analyzes the benefits of scheduling based on exploiting scalable TTI, where the channel assignment and the TTI duration are adapted to the deadlines and requirements of different services. We formulate an optimization problem by taking individual service requirements into consideration. We then prove that the optimization problem is NP-hard and provide a heuristic algorithm, which provides an effective solution to the problem. Numerical results show that our proposed algorithm is capable of finding near-optimal solutions to meet the latency requirements of mission critical communication services, while providing a good throughput performance for mobile broadband services.