Dual-band femtocell traffic balancing over licensed and unlicensed bands
Dual-band femtocell traffic balancing over licensed and unlicensed bands
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DOI：
10.1109/icc.2012.6364851
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
Feilu Liu;E. Erkip;Mihaela C. Beluri;Rui Yang;E. Bala
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文献类型：
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作者：
Feilu Liu;E. Erkip;Mihaela C. Beluri;Rui Yang;E. Bala
当今许多蜂窝用户设备（UE）能够接入未授权频带（例如，经由WiFi）和蜂窝许可频带。然而，在世界上大多数地区，他们不允许同时访问两个频段进行数据通信-用户只能选择WiFi或蜂窝。为了允许UE同时享受两个频带，在我们的早期工作中，提出了用于毫微微小区同时接入授权和未授权频带的框架。在本文中，该框架扩展到包括策略的毫微微蜂窝基站，以平衡其业务在授权和未授权频段。目标是最大化总效用（即，用户满意度），同时将毫微微到宏干扰保持在预定义阈值以下。最佳的毫微微流量平衡方案，并在网络模拟器中实现，该网络模拟器考虑了宏，毫微微和WiFi网络的活动和相互作用。仿真结果表明，与用户只能选择一个频段（许可或未许可）的当前实践相比，该方案显着增加了所有宏、毫微微和WiFi用户的总效用。
Many cellular user equipments (UEs) today are able to access both the unlicensed band (e.g., via WiFi) and the cellular licensed band. However, in most regions of the world, they are not allowed to access both bands simultaneously for data communications - users can only choose either WiFi or cellular. In order to allow UEs to enjoy both bands at the same time, in our earlier work a framework for femtocells to simultaneously access both licensed and unlicensed bands was proposed. In this paper, the framework is extended to include strategies for femtocells to balance their traffic in licensed and unlicensed bands. The goal is to maximize the sum utility (i.e., user satisfaction) of femto and WiFi users while keeping the femto-to-macro interference below predefined thresholds. The optimal femto traffic balancing scheme is obtained and implemented in a network simulator which considers the activities and interactions of macro, femto and WiFi networks. Simulation results demonstrate that the proposed scheme significantly increases sum utility of all macro, femto and WiFi users, compared with the current practices where users can choose only one band (licensed or unlicensed).