A User Selection Method for Scalable 802.11ac MU-MIMO Networks

A scalable, user-friendly technology, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., to solve problems such as network performance degradation and achieve better performance

Active Publication Date: 2018-10-09
BEIJING UNIV OF POSTS & TELECOMM
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  • Claims
  • Application Information

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Problems solved by technology

The CSI is obtained through user feedback information, so when the user base in the cell is large, the user feedback channel overhead will increase linearly with the number of users, and the user's CSI feedback exceeds the inherent time of the channel, resulting in a sharp decline in network performance

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  • A User Selection Method for Scalable 802.11ac MU-MIMO Networks
  • A User Selection Method for Scalable 802.11ac MU-MIMO Networks
  • A User Selection Method for Scalable 802.11ac MU-MIMO Networks

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0022] The present invention designs a user selection method in a scalable MU-MIMO network, which utilizes the spatial freedom of antennas to eliminate inter-cell interference and intra-cell interference, and simultaneously obtains a user selection strategy with the largest spatial stream. The present invention divides user selection into two steps. The first step is user selection in a cell, and the number of users corresponding to the number of AP antennas is selected.

[0023] Since the number of users in the cell is far greater than the number of antennas of the AP, and the number of users that the AP can serve is at most the number of antennas, it is necessary to select the users in the cell ...

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Abstract

The invention provides a user selection method of a scalability 802. 11ac MU-MIMO network and belongs to the wireless local area network technology field. In the invention, a WLAN network is clustered; for each cell in each cluster, according to the number of AP antennas, an optimum user set is selected; during selection, the user competes for a spatial freedom degree of the AP; the user possessing an optimum channel wins one spatial freedom degree of the AP and uploads CSI to the AP; and then user selection is performed and the user set satisfying a maximum space flow under the condition of eliminating an interference among the cells is acquired. By using the method, channel speeding does not change along with changes of the user number in the cell so that the user selection in the cell possesses scalability; problems that cost of an existing user selection strategy is large and efficiency is low are solved; 802. 11ac network performance is increased and the scalability is possessed.

Description

technical field [0001] The invention relates to a user selection method in a wireless local area network, in particular to a user selection method of a scalable 802.11ac MU-MIMO network. Background technique [0002] With the development of wireless local area network technology, 802.11 technologies aimed at improving network capacity emerge in an endless stream, for example, 802.11g, 802.11n, 802.11ac and so on. MU-MIMO (Multi-User Multiple-Input Multiple-Output, multi-user multiple-input multiple-output technology) is widely used in LTE macro networks as an advanced technology. In order to further improve network capacity, the new generation of wireless LAN 802.11ac adopts MU-MIMO technology, which allows wireless access points (APs) to provide data services for multiple users at the same time. This technology greatly improves spectrum efficiency and improves network performance. capacity. Since the number of antennas of the AP is limited, and the number of users in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04B7/06H04W74/08
CPCH04B7/0452H04B7/0626H04W74/0816
Inventor 胡智群路兆铭徐恒温向明亓航李兆兴王宜清
Owner BEIJING UNIV OF POSTS & TELECOMM
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