Unlock instant, AI-driven research and patent intelligence for your innovation.

A directional access control method assisted by idle nodes in WLAN

A technology for access control and idle nodes, applied in digital transmission systems, electrical components, error prevention, etc., can solve problems such as waste of channel resources, poor fairness, etc., increase logarithm, avoid hidden node problems, and improve channel utilization Effect

Active Publication Date: 2018-01-30
XIDIAN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method reduces hidden terminals, but in the same network, some users may communicate more, and some users may communicate less. Covering multiple users sequentially wastes channel resources, and the fairness is poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A directional access control method assisted by idle nodes in WLAN
  • A directional access control method assisted by idle nodes in WLAN
  • A directional access control method assisted by idle nodes in WLAN

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039]The traditional DMAC protocol is implemented by requesting to send / allowing to send RTS / CTS signals to reserve channels. When the surrounding nodes hear the handshake signal, DNAV settings are performed, and beams in the direction that will cause interference are blocked to realize distributed beam switching control. However, in a WLAN system using beam switching antennas, handshake signals for channel reservation may be missed during directional transmission / reception, causing hidden node problems. Such as image 3 As shown, nodes A, D communicate with C, B, and the beam of node A locks on beam 3 for directional data transmission and reception, so the DRTS / DCTS handshake signal between B and C is missed. After the transmission between A and D ends, if the new destination node of node A is B, C or F, the DRTS in the direction of beam 4 will interfere with the data transmission between nodes B and C; and A repeats the request until B ends the communication with C Returns...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a directional access control method assisted by an idle node in a WLAN. The content includes: the source node first monitors the channel, and after the channel is idle, sends a directional request to send DRTS information; after the idle neighbor node receives the DRTS, according to the information list Judging whether the DRTS interferes with the communication between other nodes, if it causes interference, the idle neighbor node sends a neighbor information packet NIP to the source node, blocking the transmission of the source node; if it does not cause interference, update the directional network allocation in the information list according to the DRTS Vector DNAV value, the destination node sends a directional permission to send DCTS information to the source node with the beam in the direction of receiving the DRTS of the source node, the source node starts to send data and confirms that the transmission is successful after receiving the response from the destination node, and returns to the monitoring state. The invention avoids the problem of hidden nodes caused by missing handshake signals, increases the logarithm of parallel transmission nodes, and improves channel utilization.

Description

technical field [0001] The invention belongs to the technical field of media access control MAC in a wireless local area network (WLAN), and relates to an access control method for suppressing interference caused by beam switching antennas assisted by idle nodes, in particular to a directional access control method assisted by idle nodes in WLAN . Background technique [0002] With the continuous development of wireless local area network (WLAN), the interference problem between nodes in WLAN is becoming more and more serious. In order to reduce the interference between nodes, the industry introduces beam-switching antennas into WLAN systems, and makes full use of beam-switching antennas to improve spatial multiplexing and network performance. The beam switching antenna uses a directional working mode in the data communication process, which will cause the leakage of the request to send / permission to send RTS / CTS handshake signals, thereby creating new hidden nodes and caus...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
Inventor 李晓辉宋立华白琰刘乃安付卫红黑永强韦娟
Owner XIDIAN UNIV