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arXiv 1607.03571cs.ITcs.NImath.IT
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异构网络中的非授权频谱共享业务管理

Traffic Management for Heterogeneous Networks with Opportunistic Unlicensed Spectrum Sharing

Chun-Hung Liu, Hong-Cheng Tsai

摘要:

本文研究如何最大限度地提高基于每用户的吞吐量在一个M层异构无线网络(HetNet)的最佳管理接入点(AP)之间的流量在HetNet。前M-1层中的AP可以同时使用授权频谱,而它们通过所提出的机会性载波侦听多路访问与冲突避免(CSMA/CA)协议与第M层中的AP共享未授权频谱。同时接入授权和非授权频谱的AP能够通过载波聚合技术整合其频谱资源。我们首先表征的小区负载的分布和信道接入概率的每个AP使用广义AP关联方案。对于每个层中的AP,针对信道增益和AP关联权重的一般随机模型,导出其在授权和未授权频谱中的平均频谱效率的严格下限。我们定义了每用户链路吞吐量和每用户网络吞吐量的基础上得出的平均频谱效率,并最大限度地提高他们提出的分散和集中的流量管理计划的AP在第一M-1层的约束下,每用户链路吞吐量的层M AP必须高于一些最低要求的值。最后,一个共存的LTE和WiFi网络的数值例子来验证我们的推导结果和发现。

英文摘要:

This paper studies how to maximize the per-user-based throughput in an M-tier heterogeneous wireless network (HetNet) by optimally managing traffic flows between the access points (APs) in the HetNet. The APs in the first M-1 tiers can use the licensed spectrum at the same time whereas they share the unlicensed spectrum with the APs in the Mth tier by the proposed opportunistic carrier sense multiple access with collision avoidance (CSMA/CA) protocol. The APs that access the licensed and unlicensed spectra simultaneously are able to integrate their spectrum resources by the carrier aggregation technique. We first characterize the distribution of the cell load and the channel access probability of each AP using a generalized AP association scheme. For an AP in each tier, the tight lower bounds on its mean spectrum efficiencies in the licensed and unlicensed spectra are derived for the general random models of the channel gain and AP association weights. We define the per-user link throughput and per-user network throughput based on the derived the mean spectrum efficiencies and maximize them by proposing the decentralized and centralized traffic management schemes for the APs in the first M-1 tiers under the constraint that the per-user link throughput of the tier-M APs must be above some minimum required value. Finally, a numerical example of coexisting LTE and WiFi networks is provided to validate our derived results and findings.

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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