U-CCS: An Unlicensed Component Carrier Selection Algorithm for Carrier Aggregation in LTE-U and WiFi Coexistence Networks
U-CCS: An Unlicensed Component Carrier Selection Algorithm for Carrier Aggregation in LTE-U and WiFi Coexistence Networks
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DOI：
10.1109/icc.2018.8422693
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发表时间：
2018-05
期刊：
影响因子：
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通讯作者：
Liangyu Chu;Jun Zheng;Jie Xiao;Wei Heng
中科院分区：
文献类型：
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作者：
Liangyu Chu;Jun Zheng;Jie Xiao;Wei Heng
本文考虑了在未授权频带中操作的LTE-U和WiFi共存网络的分量载波选择（CCS）问题。提出了一种非授权分量载波选择（U-CCS）算法，用于为新到达的LTE-U用户选择分量载波（CC）。为了支持U-CCS算法，首先提出了载波侦听自适应传输（CSAT）机制的实现，以协调LTE-U用户和WiFi用户在单个CC上的传输。U-CCS算法综合考虑了载波负载和信道条件，在新的LTE-U用户到达时，在所有CC中寻找一个CC，使该用户能够获得最大的吞吐量，同时保证同一CC上每个WiFi用户的平均吞吐量满足最小吞吐量要求。仿真实验表明，U-CCS算法在最小LTE-U用户吞吐量、最小WiFi用户吞吐量和新用户吞吐量方面优于现有的CC选择算法。
This paper considers the component carrier selection (CCS) problem for an LTE-U and WiFi coexistence network operating in an unlicensed spectrum band. An unlicensed component carrier selection (U-CCS) algorithm is proposed to select component carriers (CCs) for newly arrived LTE-U users. To support the U-CCS algorithm, an implementation of the carrier sense adaptive transmission (CSAT) mechanism is first presented to coordinate the transmission of LTE-U users and WiFi users on a single CC. The proposed U-CCS algorithm takes both carrier load and channel condition into account and aims to find a CC among all CCs at the arrival of a new LTE-U user, on which the user can achieve the maximum throughput, while ensuring that the average throughput of each WiFi user on the same CC meets the minimum throughput requirement. Simulation experiments show that the proposed U-CCS algorithm outperforms a couple of existing CC selection algorithms in terms of the minimum LTE-U user throughput, minimum WiFi user throughput, and newly arrived user throughput.