Distributive competition control of withdraw of radio local network

A wireless local area network, distributed technology, applied in the field of communication, can solve the problems of increasing the contention window, not guaranteeing the successful access of the current frame, and not estimating the network competition situation in real time, so as to achieve the effect of good delay performance and delay gain performance

Inactive Publication Date: 2005-02-23
XIDIAN UNIV
View PDF0 Cites 43 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the popularity of WLAN and the flexible network layout of WLAN, the number of users who choose WLAN as the access network has increased exponentially in recent years, and the network has become more and more busy. overload state
When the network enters a congested state, the binary exponential backoff method has two defects: one is to increase the size of the contention window at the cost of the collision of data packets sent by nodes; The application register records the current congestion level of the network, and then uses the network congestion level information to reasonably set the competition window of the node
However, because a...

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
  • Distributive competition control of withdraw of radio local network
  • Distributive competition control of withdraw of radio local network
  • Distributive competition control of withdraw of radio local network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] Below in conjunction with accompanying drawing, method and effect of the present invention are described in further detail

[0052] refer to figure 1 , the backoff method of the present invention is embedded in the IEEE802.11 standard protocol, through which the node controls the access channel of the data frame waiting to be sent. The backoff method SD_DCC of the present invention includes access control based on virtual collision idea, processing competition window after virtual collision, processing competition window based on slow backoff idea after successful transmission, and processing competition window after real collision.

[0053] When a node has a data frame waiting to be sent, it first processes the data frame according to the access control flow of the IEEE802.11 protocol, and then, before the data frame accesses the channel, uses the backoff method SD_DCC of the present invention to perform the node’s action on sending the data frame before sending The ...

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

First the method checks channel, and then uses the checked stop numbers of retreat-register and the initialized retreat time slot number to get the initial estimate value. After the initial estimate value of capacity factor of time slot is made smoothing processing, the probability of outgoing data frame is obtained. Then the transmission action of current data frame of node is adjectively adjusted according to transmission probability. Finally the competing window after transmission is selected according to if it is transmitted or if it hits to data of other node.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a distributed contention control backoff method of a wireless local area network. Background technique [0002] At present, because wireless local area network does not need any fixed wiring structure, wireless local area network has been widely used in the environment where the public communication network is underdeveloped, such as university campuses, hospitals, airports, large supermarkets, etc., which are not suitable for wiring. However, as the number of WLAN users increases, the load on the network becomes heavier and heavier. How to use limited bandwidth resources to improve the utilization of WLAN has become a technical problem to be solved urgently in the development of WLAN. [0003] At present, the access protocols that can be applied to WLAN include: AOB (Asymptotically Optimal Backoff) method that dynamically adjusts the transmission probability based on the p...

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
IPC IPC(8): H04L29/02H04L29/06
Inventor 李建东何宏盛敏陈彦辉
Owner XIDIAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap