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arXiv 1105.0035cs.ITmath.IT
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无线网络中基于分布式多用户MIMO链路的QoS配置的基站选择

Base-Station Selections for QoS Provisioning Over Distributed Multi-User MIMO Links in Wireless Networks

Qinghe Du, Xi Zhang

摘要:

针对分布式多输入多输出(MIMO)链路中多个位置无关的基站(BS)协同向多个移动用户传输数据的问题,提出了QoS感知的BS选择和相应的资源分配方案.我们提出的方案旨在最大限度地减少BS的使用和减少分布式MIMO传输的干扰范围,同时满足不同的统计延迟QoS要求的所有用户,其特征在于延迟约束违反概率和有效容量技术。具体来说,我们提出了两个BS使用最小化框架开发QoS感知BS选择方案和相应的无线资源分配算法在多个移动用户。第一个框架采用联合块对角化(BD)和概率传输(PT)来实现多个移动用户的多址接入,而第二个框架采用时分多址(TDMA)方法来控制多个用户的链路。然后,我们推导出这两个框架的最佳BS选择方案,分别。此外,我们还进一步讨论了仅基于PT的BS选择方案。还进行了一组模拟评估,比较研究我们提出的方案的平均BS使用和干扰范围,并分析QoS约束对分布式MIMO传输的BS选择的影响。

英文摘要:

We propose the QoS-aware BS-selection and the corresponding resource-allocation schemes for downlink multi-user transmissions over the distributed multiple-input-multiple-output (MIMO) links, where multiple location-independent base-stations (BS), controlled by a central server, cooperatively transmit data to multiple mobile users. Our proposed schemes aim at minimizing the BS usages and reducing the interfering range of the distributed MIMO transmissions, while satisfying diverse statistical delay-QoS requirements for all users, which are characterized by the delay-bound violation probability and the effective capacity technique. Specifically, we propose two BS-usage minimization frameworks to develop the QoS-aware BS-selection schemes and the corresponding wireless resource-allocation algorithms across multiple mobile users. The first framework applies the joint block-diagonalization (BD) and probabilistic transmission (PT) to implement multiple access over multiple mobile users, while the second one employs time-division multiple access (TDMA) approach to control multiple users' links. We then derive the optimal BS-selection schemes for these two frameworks, respectively. In addition, we further discuss the PT-only based BS-selection scheme. Also conducted is a set of simulation evaluations to comparatively study the average BS-usage and interfering range of our proposed schemes and to analyze the impact of QoS constraints on the BS selections for distributed MIMO transmissions.

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