Method and system for improving throughput of uplink of wireless network

Abstract

The invention discloses a method and a system for improving throughput of an uplink of a wireless network, which realize real-time evaluation of channel quality of the uplink of a user by introducing a very small amount of calculation overhead. The channel response time is reduced by multiplexing the CSI, the communication overhead caused by the channel response between the AP end and the user side is greatly reduced, the channel detection overhead is reduced by prolonging the data transmission time after each channel detection, and whether the channel of the uplink is changed is judged, so that the channel detection efficiency is improved. Meanwhile, the channel coherence time of an uplink corresponding to each user is updated, the channel detection overhead is reduced to the maximum extent, finally, healthy link users are distributed into an MU-MIMO user group, weak link users are distributed into an OFDMA user group, and the user detection efficiency is improved. According to the invention, the influence on the uplinks of other users in the same MU-MIMO user group when the uplink channel of a certain user in the MU-MIMO user group is degraded into a weak link due to object shielding, diffraction or multipath effect and the like is avoided, and the uplink throughput and communication quality of the whole network are improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method and system for improving throughput of a wireless network uplink. Background technique [0002] Compared with the upload rate, wireless network users are more sensitive to the download rate, so the early Wi-Fi technology mainly focused on how to optimize the downlink (Down Link, DL). The 802.11ac (Wi-Fi 5) protocol introduces Multi-user Multiple Input Multiple Output (MU-MIMO) technology, and the MU-MIMO network supports a single access point (Access Point, AP) using a downlink The road communicates with multiple users at the same time, thereby increasing the data transmission speed. However, with the development of technology, new scenarios such as Internet of Things (Internet Of Thing, IoT), Virtual Reality (Virtual Reality, VR), and Augmented Reality (Augmented reality, AR) all affect the uplink (Up Link, UL) The throughput puts forward ve...

AI Technical Summary

Problems solved by technology

[0004] The 802.11ax protocol proposes uplink MU-MIMO and OFDMA, which greatly improves the throughput of the uplink. However, through a lot of research and experimental observations, we found that the current uplink design in 802.11ax is still not efficient enough. There are two problems:

Therefore, when the number of users requesting to transmit data at the same time is relatively large, the number of user groups will increase accordingly, and more user groups will lead to a significant increase in channel detection overhead, which ultimately reduces the throughput of the network.

[0007] These two issues fundamentally limit the uplink throughput of 802.11ax networks, especially in dense deployments with tens or even hundreds of users connected to a single AP

In indoor scenarios, the movement of users will lead to changes in the channel state of their uplinks, and as the number of users increases, complex and diverse uplinks may lead to more serious "link pollution"

In addition, the accumulated channel sounding overhead as the number of users increases will also severely degrade the uplink throughput of the network

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