arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.08587cs.ITmath.IT
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Cloud-RAN系统中的协调和天线域形成

Coordination and Antenna Domain Formation in Cloud-RAN systems

Hadi Ghauch, Muhammad Mahboob Ur Rahman, Sahar Imtiaz, James Gross

摘要:

我们在这里研究云RAN系统中的天线域形成(ADF)问题,其中多个远程无线电头端(RRH)各自被分配给一组天线域(AD),使得AD之间的总干扰最小化。我们制定相应的优化问题,通过引入\emph{interference coupling coefficients}的概念之间的无线电头对。然后,我们提出了一个低开销的算法,允许以分布式的方式解决问题,在聚合节点(AN),并建立基本的收敛结果。此外,我们还提出了一个简单的放松的问题,从而使我们能够表征其最大性能。我们遵循一个分层的协调结构:在AD形成后,无线电头端被聚类以使用众所周知的加权MMSE算法来执行协调波束形成。最后,我们的模拟表明,使用所提出的ADF机制将显着增加系统的总速率(相对于随机分配的无线电头)。

英文摘要:

We study here the problem of Antenna Domain Formation (ADF) in cloud RAN systems, whereby multiple remote radio-heads (RRHs) are each to be assigned to a set of antenna domains (ADs), such that the total interference between the ADs is minimized. We formulate the corresponding optimization problem, by introducing the concept of \emph{interference coupling coefficients} among pairs of radio-heads. We then propose a low-overhead algorithm that allows the problem to be solved in a distributed fashion, among the aggregation nodes (ANs), and establish basic convergence results. Moreover, we also propose a simple relaxation to the problem, thus enabling us to characterize its maximum performance. We follow a layered coordination structure: after the ADs are formed, radio-heads are clustered to perform coordinated beamforming using the well known Weighted-MMSE algorithm. Finally, our simulations show that using the proposed ADF mechanism would significantly increase the sum-rate of the system (with respect to random assignment of radio-heads).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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