Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Time frequency two-dimensional hybrid MAC layer access method

An access method, time-frequency two-dimensional technology, applied in the field of communication, can solve problems such as limiting system throughput, high collision probability, and reduced MAC layer efficiency, so as to improve system throughput, reduce collision probability, and increase random access The effect of access

Inactive Publication Date: 2013-11-06
BEIJING UNIV OF POSTS & TELECOMM
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high collision probability of the existing simple CSMA / CA mechanism MAC layer protocol, especially in the case of a large number of STAs and a large amount of data, the impact of collisions reduces the efficiency of the MAC layer and limits the entire system. Throughput

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
  • Time frequency two-dimensional hybrid MAC layer access method
  • Time frequency two-dimensional hybrid MAC layer access method
  • Time frequency two-dimensional hybrid MAC layer access method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The specific implementation of the present invention will be further described in detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0031] The design idea of ​​the present invention is: in the frequency domain dimension, use OFDMA technology for access: a group of subcarriers form a subchannel, the entire bandwidth is divided into multiple different subchannels, and different users occupy different subchannels. The sub-channels are orthogonal to each other without interference. In the time dimension, the use of CSMA / CA technology enables different users (hereinafter also referred to as sites) to compete to reserve different time slots, and each user occupies different time slots to send data, avoiding interference. Thus combining OFDMA and CSMA / CA technology, two-dimensional access in the time domain and frequency domain is realized.

[0...

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 discloses a time frequency two-dimensional hybrid media access control (MAC) layer access method. In the two-dimensional direction of a frequency domain and a time domain, multiple users can compete with an available resource together, wherein the available resource comprises each sub channel and different time slots. Conflict is avoided by adopting a withdrawal mechanism, and the users are accessed to a wireless channel to transmit data by competing with the available resource and combining a reservation mechanism. The frequency resource and the time resource are simultaneously utilized in the method, and the competition and the reservation mechanism are combined, so that the utilization rate of the system channel is improved; and the conflict is avoided, so that the throughput of the whole system is effectively improved.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a time-frequency two-dimensional hybrid media access control (Media Access Control, MAC) layer access method based on CSMA / CA and OFDMA. Background technique [0002] With the rapid development of mobile communication technology, Internet technology and computer technology, mobile communication is no longer limited to simple voice communication, and high data rate services have attracted more and more attention. In the future, mobile communication users will continue to increase their expectations in terms of types and applications of achievable communication services. Wireless local area network is the product of the combination of computer network and wireless communication technology. As a typical form of broadband wireless IP access, wireless local area network has the advantages of mobile computing, flexible and fast networking, low maintenance costs and good scal...

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): H04W74/08
Inventor 康桂霞张平王晶
Owner BEIJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com