Joint licensed and unlicensed spectrum allocation for unlicensed LTE
Joint licensed and unlicensed spectrum allocation for unlicensed LTE
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DOI：
10.1109/pimrc.2015.7343611
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
Yang Xu;Rui Yin;Qimei Chen;Guanding Yu
中科院分区：
文献类型：
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作者：
Yang Xu;Rui Yin;Qimei Chen;Guanding Yu
在U-LTE系统中与Wi-Fi用户共享U-LTE频段时，最关键的问题是如何保证两个系统的和谐共存。另一方面，当在小小区基站（SBS）中与微基站（MBS）共享许可频带时，需要适当地协调同信道干扰。为了解决这两个问题，在SBS处联合考虑功率控制、授权和未授权频谱分配，以最大化频谱效率，同时保证小小区用户（SU）的QoS，并且同时提供与Wi-Fi用户的公平资源共享。应用凸优化方法设计了最优方案。然后，提供数值结果来验证所提出的方案，并证明在SBS的Wi-Fi性能和可实现的频谱效率之间的权衡。
When sharing the unlicensed band with Wi-Fi users in unlicensed LTE (U-LTE) systems, the most critical issue is how to guarantee the harmonious coexistence between the two systems. On the other hand, when sharing the licensed band with the micro base station (MBS) in the small cell base station (SBSs), the co-channel interference needs to be properly coordinated. To address these two issues, power control, licensed and unlicensed spectrum allocation are jointly considered at the SBS to maximize the spectrum efficiency while guaranteeing the QoS of small cell users (SUs) and at the same time providing fair resource sharing with Wi-Fi users. The convex optimization method is applied to design the optimal scheme. Then, numerical results are provided to verify the proposed scheme and demonstrate the tradeoff between the Wi-Fi performance and the achievable spectrum efficiency at the SBS.