Joint Channel Assignment and Occupancy Time Optimization in Frame-Based Listen-Before-Talk
Joint Channel Assignment and Occupancy Time Optimization in Frame-Based Listen-Before-Talk
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DOI：
10.1109/lcomm.2019.2959525
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发表时间：
2020-03
期刊：
影响因子：
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通讯作者：
Sina Khoshabi Nobar;M. Ahmed;Y. Morgan;S. Mahmoud
中科院分区：
文献类型：
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作者：
Sina Khoshabi Nobar;M. Ahmed;Y. Morgan;S. Mahmoud
我们研究的长期演进（LTE）网络的性能优化问题，工作在未授权频段，并与现有的WiFi网络共享。我们认为LTE网络是基于基于帧的先说先试协议。我们制定了联合信道分配和信道占用时间优化问题，使用随机整数规划（IP）模型。通过应用李雅普诺夫漂移加罚定理，我们开发了一个渐近最优解的多项式时间复杂性的随机IP问题。数值结果和所提出的解决方案的性能进行了比较的两种替代方法，其中的信道分配和信道占用时间顺序确定的性能。
We study the performance optimization problem of the long term evolution (LTE) network operating in the unlicensed band and sharing it with an existing WiFi network. We consider the LTE network to be based on the frame-based listen-before-talk protocol. We formulate the joint channel assignment and channel occupancy time optimization problem using a stochastic integer programming (IP) model. By applying the Lyapunov drift-plus-penalty theorem, we develop an asymptotically optimal solution with polynomial time-complexity for the stochastic IP problem. Numerical results are presented and the performance of the proposed solution is compared to the performance of two alternative approaches in which the channel assignment and channel occupancy time are determined sequentially.