[1]王玮,徐平平,张源.未授权频段LTE-LAA与WiFi共存系统性能分析[J].东南大学学报(自然科学版),2017,47(3):426-431.[doi:10.3969/j.issn.1001-0505.2017.03.002]
 Wang Wei,Xu Pingping,Zhang Yuan.Performance analysis for coexisting system of LTE-LAA and WiFi in unlicensed band[J].Journal of Southeast University (Natural Science Edition),2017,47(3):426-431.[doi:10.3969/j.issn.1001-0505.2017.03.002]
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未授权频段LTE-LAA与WiFi共存系统性能分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第3期
页码:
426-431
栏目:
信息与通信工程
出版日期:
2017-05-20

文章信息/Info

Title:
Performance analysis for coexisting system of LTE-LAA and WiFi in unlicensed band
作者:
王玮徐平平张源
东南大学移动通信国家重点实验室, 南京210096
Author(s):
Wang Wei Xu Pingping Zhang Yuan
National Mobile Communications Research Laboratory, Southeast University, Nanjing 211096, China
关键词:
LAA LBT Cat3 Markov 系统共存
Keywords:
licensed-assisted access(LAA) listen-before-talk category 3(LBT Cat3) Markov system coexistence
分类号:
TN929.5
DOI:
10.3969/j.issn.1001-0505.2017.03.002
摘要:
为分析在未授权频段授权辅助接入(LAA)框架与无线局域网802.11系列标准(WiFi)共存的系统公平性问题,基于当前LAA框架的类型B(type B),建立了LAA系统与WiFi系统的共存模型.使用二维离散马尔可夫(Markov)模型对type B接入过程的‘说之前听’类型3(LBT Cat3)进行建模分析,进而建立共存模型.通过更改共存的设备数量和LAA 设备的LBT Cat3参数,分析LAA设备与WiFi设备在共存场景中的性能.根据分析模型创建相应仿真场景,以验证分析模型性能.分析计算结果与仿真计算结果表明,提出的分析模型在不同LAA与WiFi设备数量比和不同LBT Cat3参数情况下均能有效预测共存的LAA与WiFi设备成功占用信道比率.LAA系统适当调整LBT Cat3参数可以实现与WiFi系统公平共存和最大化信道利用率.
Abstract:
To analyze the problem in the unlicensed band, the fairness of coexisting licensed-assisted access(LAA)and 802.11 WLAN(WiFi)systems, based on the type B access procedure, this paper proposed a coexisting model for the LAA system and WiFi system. A discrete-time two-dimensional Markov chain was used to model and analyze the listen-before-talk category 3(LBT Cat3)in type B access procedure, and then a coexistence model was established. The performance of the LAA device and WiFi device in the coexistence scenario was analyzed by changing the quantity of the coexisting device and the LBT Cat3 parameters of the LAA device. The simulation scenario was setup according to the analysis model to verify the performance of the analysis model. The performance of the using LBT Cat3 LAA device and WiFi device in the coexisting scenario is analyzed. The analysis result and the simulation result show that the analyzing model is valid in predicting the successful airtime share of the LAA and WiFi device in case of the different coexisting LAA to WiFi device number ratios and different LBT Cat3 parameters. LAA system can appropriately adjust the parameters of LBT Cat3 to achieve the fairness coexistence with WiFi and maximize channel utilization.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2016-10-06.
作者简介: 王玮(1982—),女,博士生;徐平平(联系人),女,博士,教授,博士生导师,xpp@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(61571111).
引用本文: 王玮,徐平平,张源.未授权频段LTE-LAA与WiFi共存系统性能分析[J].东南大学学报(自然科学版),2017,47(3):426-431. DOI:10.3969/j.issn.1001-0505.2017.03.002.
更新日期/Last Update: 2017-05-20