RoF-DAS架构下具有差错重传的预约式WLAN MAC协议研究

doi:10.11959/j.issn.1000-436x.2020056

通信学报 ›› 2020, Vol. 41 ›› Issue (3): 102-111.doi: 10.11959/j.issn.1000-436x.2020056

RoF-DAS架构下具有差错重传的预约式WLAN MAC协议研究

官铮¹,熊磊¹,贾徭¹,何敏¹,杨志军^1,²

¹ 云南大学信息学院，云南昆明 650091
² 云南省教育厅教育科学研究院，云南昆明 650223

修回日期:2020-02-28 出版日期:2020-03-25 发布日期:2020-03-31
作者简介:官铮（1982- ），女，云南普洱人，博士，云南大学副教授，主要研究方向为通信网络性能优化、轮询控制系统分析与应用|熊磊（1992- ），男，四川广元人，云南大学博士生，主要研究方向为轮询系统、无线通信网络、光通信网络技术等|贾徭（1995- ），女，云南曲靖人，云南大学硕士生，主要研究方向为轮询系统与无线网络|何敏（1975- ），女，四川宜宾人，博士，云南大学副教授，主要研究方向为轮询控制理论、计算机网络（移动ad hoc网络、无线传感器网络、移动互联网）、物联网、嵌入式系统等|杨志军（1986- ），男，云南保山人，博士，云南省教育厅研究员，主要研究方向为计算机通信网络、无线通信和轮询系统
基金资助:
国家自然科学基金资助项目(61761045);云南省基础应用研究计划基金资助项目(2017FB100)

Research on scheduled WLAN MAC protocol with failure retries on RoF-DAS architecture

Zheng GUAN¹,Lei XIONG¹,Yao JIA¹,Min HE¹,Zhijun YANG^1,²

¹ School of Information Science and Engineering,Yunnan University,Kunming 650091,China
² Institute of Education Sciences,Educational Department of Yunnan Province,Kunming 650223,China

Revised:2020-02-28 Online:2020-03-25 Published:2020-03-31
Supported by:
The National Natural Science Foundation of China(61761045);Yunnan Applied Basic Research Projects(2017FB100)

摘要/Abstract

摘要：

为减少控制帧消耗，降低系统接入时延，提出了预约式门限服务轮询接入（SGPA）策略，将站点接入时刻缓存区中的排队数据整合为数据集，对数据集进行统一发送和确认。针对RoF-DAS 架构下WLAN差错重传机制与网络接入性能的定量关系进行分析，建立了具有内部数据的门限服务轮询（IAGP）排队模型，利用轮询系统中内部数据的到达和服务过程描述数据差错重传机制，然后基于马尔可夫链和概率母函数方法推导出站点数据时延性能与重传次数、重传概率等参数的定量关系表达式。仿真实验结果表明，SGPA 与典型 IEEE 802.11 PCF相比有效降低了接入时延；采用IAGP模型对系统时延性能分析的理论计算值与仿真结果一致。该分析模型为非理想信道环境和差错重传机制下的RoF-DAS WLAN网络接入性能分析提供了一种快速评估机制。·

关键词: 同播分布式天线系统, 媒体接入控制, 差错重传, 性能评估, 数学建模

Abstract:

Aim to reduce control frames consumption and improve the delay performance,a scheduled gated-service polling access (SGPA) mechanism was proposed,in which the total data packets in the buffer at the polling instant were aggregated into a data set,that was transmitted and acknowledged uniformly.Then,an inner-arrival gated-service polling (IAGP) model was proposed to analyze the quantitative relationship between failure retry mechanism and network access performance of the wireless local area network (WLAN) in RoF-DAS.The failure retry mechanism were modeled as the arrival and service process of inner customers in IAGP.Using the Markov chain and generating function method,the closed-form expressions for the quantitative relationship between delay performance and retrial parameters,such as retry times,and the probability of retransmission,were achieved.The simulation results show that the proposed SGPA can achieve a lower delay than IEEE 802.11,and the theoretical performance evaluation calculated by IAGP are identical with the simulation results,which provides an effective evaluation mechanism for the access performance in RoF-DAS WLAN,with inperfect channel and failure retry mechanism.

Key words: simulcast distributed antenna system, media access control, failure retry, performance analysis, mathematical model

中图分类号:

TN914

官铮,熊磊,贾徭,何敏,杨志军. RoF-DAS架构下具有差错重传的预约式WLAN MAC协议研究[J]. 通信学报, 2020, 41(3): 102-111.

Zheng GUAN,Lei XIONG,Yao JIA,Min HE,Zhijun YANG. Research on scheduled WLAN MAC protocol with failure retries on RoF-DAS architecture[J]. Journal on Communications, 2020, 41(3): 102-111.

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参考文献 15

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参数	取值
调制方式	16QAM
信道速率/(Mbit·s^-1)	36
编码率	3/4
数据分组长/B	1 500
T_DATA/μs	370
T_ACK/μs	34
T_CE/μs	58
T_Beacon/μs	58
T_POLL/μs	34
T_PIFS/μs	19
T_SIFS/μs	10

站点数/个	理论值/个	仿真值/个
5	0.104 29	0.101 32±0.033 24
10	0.232 87	0.231 46±0.078 95
15	0.395 34	0.383 62±0.099 31
20	0.607 14	0.615 42±0.112 43
25	0.894 73	0.903 61±0.132 57
30	1.307 69	1.321 87±0.155 64
35	1.950 81	1.959 41±0.235 12
40	3.090 91	3.010 91±0.301 26
45	5.666 67	5.541 82±0.468 57
50	17.000 00	16.832 96±0.783 53

站点数/个	理论值/slot	仿真值/slot
5	3.110 42	3.132 51±0.074 13
10	7.013 69	7.046 75±0.196 46
15	11.945 73	11.845 74±0.243 62
20	18.375 04	18.675 38±0.421 36
25	27.105 26	27.406 18±0.610 43
30	39.641 02	39.141 03±0.851 31
35	59.163 93	58.303 93±1.265 74
40	93.772 73	92.172 73±1.631 22
45	171.962 96	170.563 24±1.819 64
50	516.000 00	514.03265±2.899 73

RoF-DAS架构下具有差错重传的预约式WLAN MAC协议研究

Research on scheduled WLAN MAC protocol with failure retries on RoF-DAS architecture

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