面向Wi-Fi8的非主信道分组接入方法

doi:10.12305/j.issn.1001-506X.2026.09.37

系统工程与电子技术 ›› 2026, Vol. 48 ›› Issue (9): 3251-3259.doi: 10.12305/j.issn.1001-506X.2026.09.37

• 通信与网络 • 上一篇

面向Wi-Fi8的非主信道分组接入方法

戴星亚¹^,²(), 万国伟¹^,², 康凯¹

1. 中国科学院上海高等研究院，上海 201210
2. 中国科学院大学，北京 100049

收稿日期:2025-08-28 修回日期:2025-09-29 出版日期:2026-01-24 发布日期:2026-01-24
通讯作者: 康凯 E-mail:1527694569@qq.com
作者简介:戴星亚（2000—），男，硕士研究生，主要研究方向为下一代无线通信、Wi-Fi
万国伟（1999—），男，硕士研究生，主要研究方向为下一代无线通信、Wi-Fi

Non-primary channel grouped access method for Wi-Fi 8

Xingya Dai¹^,²(), Guowei Wan¹^,², Kai Kang¹

1. Shanghai Advanced Research Institute，Chinese Academy of Sciences，Shanghai 201210，China
2. University of Chinese Academy of Sciences，Beijing 100049，China

Received:2025-08-28 Revised:2025-09-29 Online:2026-01-24 Published:2026-01-24
Contact: Kai Kang E-mail:1527694569@qq.com

摘要/Abstract

摘要：

在Wi-Fi1至Wi-Fi7的技术框架下，设备接入信道过程中，在主信道繁忙时，非主信道即使处于空闲状态也无法被利用。针对此问题，Wi-Fi8提出了非主信道接入( non-primary channel access ，NPCA)方法，吞吐量有一定提升，但在低带宽设备数较多时信道竞争加剧且接入后频带利用率也较低，限制了吞吐量的进一步提升。基于此，提出一种基于分组方式的NPCA方法，该方法在设备端根据设备的带宽对设备进行分组，同时在接入点一侧对空闲的非主信道根据设备端的不同带宽类型设备的数量比例进行对应的带宽动态分组，不同分组内的设备独立竞争。通过仿真验证，在设备数量增加到一定值时，分组NPCA方法相较于原本的NPCA方式，在接入非主信道时可以平均降低55.97%的冲突率，有效提高设备接入成功概率；并提高信道吞吐量28.83%，有效提升了NPCA技术的信道吞吐量。

关键词: Wi-Fi8, 非主信道接入, 非主信道分组, 降低冲突, 吞吐量模型

Abstract:

In the technical framework of Wi-Fi1 to Wi-Fi7, during the device access channel, when the primary channel is busy, non-primary channels remain unused even if idle. To address this issue, Wi-Fi8 proposes a non-primary channel access （NPCA） method, which improves throughput. However,when a large number of low-bandwidth devices are present, channel contention intensifies and spectrum utilization after access remains low, limiting further throughput enhancement. Based on this, a grouped NPCA method is presented. At the device side, devices are classified by bandwidth. At the access point side, idle non-primary channels are dynamically partitioned according to the proportion of different bandwidth-type devices, allowing independent contention within each group. Simulations demonstrate that when the number of devices exceeds a threshold, grouped NPCA reduces collision probability by 55.97% on average compared to conventional NPCA, effectively improving access success rates. Additionally, it increases channel throughput by 28.83%, leading to a significant enhancement in the channel throughput of NPCA technology.

Key words: Wi-Fi8, non-primary channel access （NPCA）, non-primary channel grouping, collision reduction, throughput model

中图分类号:

TN 925.93

戴星亚, 万国伟, 康凯. 面向Wi-Fi8的非主信道分组接入方法[J]. 系统工程与电子技术, 2026, 48(9): 3251-3259.

Xingya Dai, Guowei Wan, Kai Kang. Non-primary channel grouped access method for Wi-Fi 8[J]. Systems Engineering and Electronics, 2026, 48(9): 3251-3259.

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参数	参数值
信道带宽B/MHz	320
仿真时长/s	50
接入概率p	0.02
调制与编码方案	11
码率w	5/6
时隙σ/μs	9
$ {\mathrm{C}\mathrm{W}}_{\mathrm{m}\mathrm{i}\mathrm{n}} $	16
$ {\mathrm{C}\mathrm{W}}_{\mathrm{m}\mathrm{a}\mathrm{x}} $	1024
SIFS/μs	16
DIFS/μs	SIFS+2σ
$ \mathrm{用}\mathrm{户}\mathrm{数} $	0-200
帧长/μs	504
报头D/μs	56
传输时延$\xi $/μs	1
设备比例（20∶40∶80∶160∶320）MHz	4∶1∶1∶1∶1

面向Wi-Fi8的非主信道分组接入方法

Non-primary channel grouped access method for Wi-Fi 8

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