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Same-frequency full duplex media access control method in a wireless local area network

A media access control, same-frequency full-duplex technology, applied in wireless communication, duplex signal operation, network topology, etc.

Active Publication Date: 2019-05-28
CHONGQING JINMEI COMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on the premise that the physical layer supports full-duplex at the same frequency, the present invention proposes a media access control protocol method for full-duplex at the same frequency in a wireless local area network, which solves the problem of timing selection for sending uplink and downlink data at the same frequency and full-duplex at the same frequency, and user station selection for uplink sending. , Power control issues, improve network utilization

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  • Same-frequency full duplex media access control method in a wireless local area network
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  • Same-frequency full duplex media access control method in a wireless local area network

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Embodiment Construction

[0028] In order to make the objects and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the accompanying drawings and examples.

[0029] figure 1 It is a schematic diagram of the wireless local area network between the central station and the user station. The initialization of the network includes: the central station, the user station A, the user station B, the user station C, and the user station D. The central station sends downlink information to the user station A, and the central station After receiving the uplink information sent by user station B, user station E sends an application to the central station to join the network, and the central station performs network maintenance.

[0030] figure 2 It is a schematic diagram of the frame structure of the air interface. The uplink and downlink data frames are identified in the figure. The frame structure of the uplink data frame is the same...

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Abstract

The invention discloses a wireless local area network. The invention discloses a full-duplex media access control method for receiving uplink information at the same frequency while a central stationsends information in a downlink mode at a certain frequency. The method comprises the following steps: when a network is initialized, a central station establishes and maintains a channel attenuationinformation table between each user station and the central station and between each user station and other user stations, so that the central station determines an uplink sending user station and distributes uplink sending power of the user stations during transmission; in the information transmission process, the central station sends and receives data in a co-frequency full-duplex uplink and downlink mode; a blank time slot T is added to the central station after a first short inter-frame interval SIFS, a new user station sends a request to the central station in the blank time slot and reports the attenuation condition of the central station signal received by the new user station and the attenuation condition of interference signals of other user stations, and the central station executes a network maintenance process and updates a channel attenuation information table. According to the method, the same-frequency full-duplex information receiving and transmitting of the central station side is realized, the information interaction efficiency in a wireless local area network is improved, and the influence on the data receiving and transmitting of other user stations when a newuser station joins is reduced.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an information exchange method between a center station supporting same-frequency full-duplex and multi-user stations in a wireless local area network. Background technique [0002] At present, wireless communication networks have been widely used in military and civilian fields. However, most of the traditional wireless LANs do not support the same-frequency full-duplex function; the existing research results of the same-frequency full-duplex focus on the physical layer signal processing, and there is still a big gap from the actual application. Contents of the invention [0003] Based on the premise that the physical layer supports full-duplex at the same frequency, the present invention proposes a media access control protocol method for full-duplex at the same frequency in a wireless local area network, which solves the problem of timing selection for sending uplink an...

Claims

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Application Information

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IPC IPC(8): H04W52/24H04W52/36H04W72/04H04W72/12H04W74/02H04L5/14H04W84/12
Inventor 周继华赵涛张瀚文彭湖黄华赵兴祥
Owner CHONGQING JINMEI COMM
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