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Channel detection method for multi-AP cooperative transmission and related device

A technology of cooperative transmission and communication devices, which is applied in the field of channel detection of multi-AP cooperative transmission, can solve problems such as inter-cell interference, achieve the effect of reducing inter-cell interference and improving service quality

Pending Publication Date: 2021-12-03
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Since wireless access points (APs) are easy to deploy, more and more dense APs also bring more inter-cell interference

Method used

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  • Channel detection method for multi-AP cooperative transmission and related device
  • Channel detection method for multi-AP cooperative transmission and related device
  • Channel detection method for multi-AP cooperative transmission and related device

Examples

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example 1

[0142] Example 1: see Figure 9 , Figure 9 It is a schematic diagram of a sequence of a channel detection method for multi-AP cooperative transmission provided by an embodiment of the present application. Such as Figure 9 As shown, the channel sounding method for multi-AP cooperative transmission can be divided into a sounding stage and a feedback stage. Such as Figure 9 As shown in 9a of , AP1 participates in the subsequent multi-AP cooperative transmission; as shown in Figure 9 As shown in 9b, AP1 does not participate in subsequent multi-AP cooperative transmission. Such as Figure 9 As shown in 9a, the detection phase includes: AP1 sends an EHT NDPA frame, and sends an NDP frame after a SIFS interval, and AP2 and AP3 send NDP frames at the same time as AP1. Such as Figure 9 As shown in 9b, the detection phase includes: AP1 sends an EHT NDPA frame, and after receiving the EHT NDPA frame, AP2 and AP3 send NDP frames at the same time after a SIFS interval. Figure...

example 2

[0143] Example 2: see Figure 10 , Figure 10 It is another schematic diagram of the sequence of the channel detection method for multi-AP cooperative transmission provided by the embodiment of the present application. Such as Figure 10 As shown, the channel sounding method for multi-AP cooperative transmission can also be divided into a sounding stage and a feedback stage. Such as Figure 10 As shown in 10a of , AP1 participates in the subsequent multi-AP cooperative transmission; for example Figure 10 As shown in 10b of , AP1 does not participate in subsequent multi-AP cooperative transmission. Such as Figure 10 As shown in 10a of , the detection phase includes: AP1 sends an EHT NDPA frame, and sends an NDP frame after a SIFS interval, AP2 sends an NDP frame at an interval of one SIFS after AP1 sends an NDP frame, and AP3 sends an NDP frame after an interval of one SIFS after AP2 sends an NDP frame SIFS sends NDP frames. Such as Figure 10 As shown in 10b, the det...

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Abstract

The invention relates to the field of wireless communication, in particular to a channel detection method for multi-AP cooperative transmission and a related device, for example, the method and the device are applied to a wireless local area network supporting an 802.11 be standard. The method comprises the following steps: a first AP / main AP generates and sends a declaration frame carrying first indication information to indicate the type of downlink multi-AP cooperative transmission; a plurality of APs (which may include the first AP or may not include the first AP) participating in multi-AP cooperative transmission send an NDP frame; and the STA performs channel measurement on the received NDP frame according to the indicated type of the downlink multi-AP cooperative transmission, generates a beam forming report corresponding to the type of the downlink multi-AP cooperative transmission and feeds back the beam forming report to the first AP so as to support different types of multi-AP cooperative transmission, reduce inter-cell interference and improve the service quality of a user.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a channel detection method and a related device for multi-AP cooperative transmission. Background technique [0002] Before transmitting data, a wireless access point (access point, AP) needs to perform a channel sounding (Sounding) process to obtain channel state information (channel state information, CSI) of a station (station, STA). CSI can make the communication system adapt to the current channel conditions, and provide guarantee for high-reliability and high-speed communication in multi-antenna systems. In the Institute of Electrical and Electronics Engineers (IEEE, Institute of Electrical and Electronics Engineers) 802.11ax standard, the channel detection process of single AP and single user feedback is as follows Figure 1a as shown, Figure 1a It is a schematic diagram of channel detection for single user / STA feedback in the 802.11ax standar...

Claims

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Application Information

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IPC IPC(8): H04W24/08H04W24/10H04B7/0426H04B17/309
CPCH04W24/08H04W24/10H04B7/043H04B17/309H04B7/024H04B7/0617H04W84/12
Inventor 郭宇宸希米·西隆李云波于健淦明多伦·埃兹里埃泽尔·梅尔泽根纳季·特所迪克
Owner HUAWEI TECH CO LTD
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