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A Carrier Sense Multiple Access Method with Collision Avoidance Based on Network Coding

A carrier sense multiple access, collision avoidance technology, applied in digital transmission systems, forward error control use, error prevention and other directions, can solve problems such as unfavorable system throughput, waste of time slot resources, improvement, etc., to reduce hidden sites. problems, and the effect of improving system throughput

Active Publication Date: 2018-10-12
南京易太可通信技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing mechanism when RTS collides will cause a waste of time slot resources, which is not conducive to the improvement of system throughput.

Method used

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  • A Carrier Sense Multiple Access Method with Collision Avoidance Based on Network Coding
  • A Carrier Sense Multiple Access Method with Collision Avoidance Based on Network Coding
  • A Carrier Sense Multiple Access Method with Collision Avoidance Based on Network Coding

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0027] The invention provides a carrier sense multiple access method with collision avoidance based on network coding, figure 2 The general flow chart that realizes for the present invention, image 3 The time slot diagram realized for the present invention is specifically described as that the method realizes the multiplexing of the three bits of the RTS frame frame control field to indicate the QoS information of the station sending data, and the two conflicting RTS m...

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Abstract

The invention discloses a carrier sense multiple access with collision avoidance (CSMA-CA) method based on network coding. According to the method, QoS of a site sending data is indicated by multiplexing three bits of a frame control field of an RTS frame, mixed information of two received conflicting RTSs is forwarded in a broadcast mode at an AP, two sending sites, according to prior RTS frames of themselves, analyze the received mixed information, and then, according to the QoS indication information grade of specific bits of the RTSs, a site with higher QoS of the sending data is selected for preferential access to a channel. Compared to a conventional RTS conflict processing mechanism, the method provided by the invention can better reduce the problem of hidden sites, fully utilizes time slot resources and improves the system throughput.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a network coding-based carrier sense multiple access method with collision avoidance in an 802.11 wireless local area network. Background technique [0002] As a member of the IEEE 802 LAN standard family, IEEE 802.11 is compatible with Ethernet at the link layer. 802.11MAC (Media Access Control, MAC) supports shared access to wireless media through a Carrier Sense Multiple Access with Collision Avoidance (CSMA / CA) technology with collision avoidance, and CSMA / CA technology supports A simple distributed, contention-based access protocol forms the basis of the 802.11MAC protocol. [0003] The distributed nature of 802.11 WLAN (Wireless Local Area Networks, WLAN) channel access makes carrier sense critical for collision-free operation. The physical carrier sense logically present in the PHY (Physical Layer, PHY) is responsible for detecting the transmissions of oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/08H04L1/00
CPCH04L1/0076H04W74/0816
Inventor 何世文廖树日高卉黄永明王海明杨绿溪洪伟张军江华
Owner 南京易太可通信技术有限公司
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