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Point coordination wireless medium access method based on latest leaving moment and least heap

A wireless medium and access method technology, applied in wireless communication, electrical components, etc., can solve the problems that data frames are difficult to access channels and occupy channel resources for a long time, so as to improve the effective utilization rate and reduce the transmission frequency , Avoid the effect of wasting network resources

Active Publication Date: 2018-04-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

On the other hand, once a burst of high-priority data frames occurs, channel resources will be occupied for a long time, while low-priority data frames will hardly get the opportunity to access the channel.

Method used

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  • Point coordination wireless medium access method based on latest leaving moment and least heap
  • Point coordination wireless medium access method based on latest leaving moment and least heap
  • Point coordination wireless medium access method based on latest leaving moment and least heap

Examples

Experimental program
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Embodiment

[0030] This embodiment provides a method for coordinating wireless medium access based on the latest departure time and the minimum heap point. The flow chart of the method is as follows figure 1 shown, including the following steps:

[0031] S1. The data packet first enters the queue of the common site, and calculates the local remaining delay and the latest departure time, wherein, when the data packet enters the queue, it is queued according to the latest departure time of the data packet, so that the latest departure time is smaller Data packets, the higher the position in the queue;

[0032]The data packets of each service flow have a maximum end-to-end delay limit. When the end-to-end delay of a data packet exceeds its maximum value, the data packet will be discarded even after being received by the target site. , therefore, the maximum value of the end-to-end delay can also be understood as the maximum survival time of the data packet. The maximum value of the end-to-e...

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Abstract

The invention discloses a point coordination wireless medium access method based on the latest leaving moment and the least heap; different from a conventional MAC protocol, the method controls the medium access according to the emergency degrees of a data packet, wherein the emergency degrees use residual time delay as the measuring basis; the site to which the data packet with the less residualtime delay is located preferentially obtains the polling opportunity, thus greatly avoiding network resource wastes caused by losing data packets sent in overtime; in addition, the single polling cansend a plurality of data frames, thus reducing polling frame sending frequency, and improving the channel effective utilization rate.

Description

technical field [0001] The invention relates to the field of wireless medium access control in a wireless local area network, in particular to a point-coordinated wireless medium access method based on the latest departure time and the minimum stack. Background technique [0002] The IEEE 802.11 WLAN standard plays a very important role in building a wireless broadband computing environment. Multimedia applications in wireless networks are usually multi-user and require QoS support, such as bandwidth, delay, jitter, and bit error rate guarantees. Since the traditional MAC layer does not support the QoS function and the physical layer often changes state due to noise interference, it is a big challenge to guarantee the QoS requirement of the 802.11 WLAN. Therefore, improving the IEEE802.11MAC layer protocol to meet the QoS requirements has great application significance. [0003] The basic mode of IEEE 802.11 is DCF (Distributed Coordination Function, distributed coordinati...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04W74/00
CPCH04W74/002H04W74/0875
Inventor 官权升余德成陈伟琦官权学
Owner SOUTH CHINA UNIV OF TECH
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