Enabling synchronous directional channel access on SDRs for spectrum sharing applications

Enabling synchronous directional channel access on SDRs for spectrum sharing applications
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为频谱共享应用启用 SDR 上的同步定向信道访问

DOI:
10.1145/2980159.2980166
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发表时间:
2016
期刊:
and Characterization
影响因子:
--
通讯作者:
Dandekar, Kapil R.
Dandekar, Kapil R.
中科院分区:
--
文献类型:
--
作者:
Nguyen, Danh H.;Paatelma, Anton;Saarnisaari, Harri;Kandasamy, Nagarajan;Dandekar, Kapil R.

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无处不在的无线小小区部署需要从根本上重新考虑小区内、小区之间以及与覆盖宏小区的干扰管理。在这些场景中增加频谱效率的一种手段是通过同时定向发送和接收,其中可以选择天线方向,使得总体干扰最小化,或者满足某个其他成本函数。为了真实地评估这些波束控制技术的性能,通常需要网络模拟器或测试台。然而,一个有能力的测试平台,涵盖足够的小小区的操作方面,并采用定向天线尚未在文献中找到。在本文中,我们提出了WARP-TDMAC,一个软件定义的无线电框架,使小型小区的基于方向性的频谱共享方案的原型。WARP-TDMAC将紧凑型方向图可重构天线与高性能802.11物理层集成,并使用基于时分多址(TDMA)的介质访问控制(MAC)方案进行天线方向调度。我们的同步和时间/空间调度能力的测试平台,通过几个例子MAC方案,将很难实现没有我们的跨层框架的特点。实证结果表明,适当使用方向性可以在密集的小小区部署中获得更高的网络总速率,但需要进一步研究才能为这种高度复杂的操作环境找到有效的解决方案。
Ubiquitous wireless small-cell deployment requires a fundamental rethink of interference management within the cell, between cells, and with overlaying macrocells. One mean to increase spectral efficiency in these scenarios is through simultaneous directional transmissions and receptions, wherein the antenna directions can be selected such that the overall interference is minimized, or some other cost function is satisfied. To realistically evaluate the performance of these beamsteering techniques, network simulators or testbeds are often required. Nevertheless, a capable testbed that covers sufficient small-cell operational aspects and incorporates directional antennas has yet to be found in the literature. In this paper we present WARP-TDMAC, a software-defined radio framework to enable the prototyping of directionality-based spectrum sharing schemes for small cells. WARP-TDMAC integrates compact pattern-reconfigurable antennas with a high performance 802.11 physical layer and uses a time division multiple access (TDMA) based medium access control (MAC) scheme for antenna direction scheduling. We characterize the synchronization and temporal/spatial scheduling capabilities of this testbed through several example MAC schemes that would have been difficult to realize without our cross-layer framework. The empirical results show that appropriate use of directionality can result in higher network sum rates in dense small-cell deployments, but further investigation is required to find an effective solution for this highly complex operational environment.
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DOI: 10.1145/1614293.1614312
发表时间: 2009
期刊: ACM SIGMOBILE Mob. Comput. Commun. Rev.
影响因子: --
作者:
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DOI: 10.1109/eucap.2014.6902391
发表时间: 2014
期刊: EuCAP 2014
影响因子: --
作者:
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通讯作者: Dandekar, Kapil R.