全双工WLAN的吞吐量性能分析

doi:10.11959/j.issn.1000-0801.2016172

Abstract

Abstract:

WLAN is one of the important ways of accessing mobile internet.However，the performance of WLAN declines rapidly as the number of users increases.Improving the performance of WLAN with high density deployment is an important research direction of WLAN technology.Distributed coordination function（DCF）which was the basic media access method of IEEE 802.11 in infrastructure-based networks was modeled and the bottleneck of downlink throughput was pointed out.Taking advantage of full-duplex technology where there was a breakthrough in recent years，a new MAC protocol was designed and analyzed.By providing the AP full-duplex transmitting ability and simple modifications to traditional DCF protocol，the new protocol made the downlink throughput breaking through the bottleneck in infrastructure-based WLAN and increased the total throughput by more than 60%.

Key words: IEEE 802.11, full-duplex, infrastructure

Chen ZHAO,Yunzhou LI,Xibin XU,ANGJing W. Analysis of the throughput in full-duplex WLAN[J]. Telecommunications Science, 2016, 32(6): 83-92.

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References 10

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参数	采用值
信道速率/（Mbit·s^-1）	1
时隙δ/μs	50
SIFS/μs	28
DIFS/μs	128
数据分组信息比特数/bit	8 184
MAC层帧头/bit	272
PHY层帧头/bit	128
ACK	112 bit+PHY头
RTS	160 bit+PHY头
CTS	112 bit+PHY头

场景	路径损失/dB	临界距离/m
LOS	20lgd+40.1	625.2
模型A/B/C NLOS	35lgd+29.6	79.0
模型D NLOS	35lgd+25.1	106.2
模型E NLOS	35lgd+20.6	142.8
模型F NLOS	35lgd+17.9	170.6

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Analysis of the throughput in full-duplex WLAN

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