Method of disposing internal collision of enhanced distributed channel access

A distributed channel and internal collision technology, applied in wireless communication, electrical components, etc., can solve the problems of not considering the impact of power-saving internal competition data transmission, increasing the external collision of the communication network, and low priority, so as to ensure the passage of business The effect of high probability of overcoming external collisions and improving network performance

Active Publication Date: 2015-04-08
XIDIAN UNIV
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Problems solved by technology

However, the method still has the shortcomings that, firstly, this method increases the probability of external collisions in the communication network; secondly, when a collision occurs inside the data sending node, this method does not consider the impact of power-saving internal competition on data transmission, resulting in traffic The problem of unfairness to low priority caused by internal collision during transmission

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  • Method of disposing internal collision of enhanced distributed channel access
  • Method of disposing internal collision of enhanced distributed channel access
  • Method of disposing internal collision of enhanced distributed channel access

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Embodiment Construction

[0023] Attached below figure 1 The present invention is further described in detail.

[0024] Step 1. Select the queue with the highest priority to be sent to send data.

[0025] The node compares the priority of its internal queues to be sent, and sends data to the queue with the highest priority after the channel is idle for a short frame interval, and the remaining queues to be sent keep the value of their internal backoff counters at 0.

[0026] When the internal backoff counter of the non-highest priority queue to be sent backs off to 0, the internal backoff counter does not trigger the queue to send data, nor does it select a new value to back off again, but temporarily stops working without triggering any operations.

[0027] Step 2, judging whether the sending is successful.

[0028] The sending station continues to monitor the media during the transmission to monitor whether there is a conflict. If a conflict occurs, the amplitude of the carrier signal sent by the ...

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Abstract

The invention discloses a method of disposing an internal collision of enhanced distributed channel access and solves the problems that unfair of low priority caused by the internal collision in the prior art. The steps comprises that firstly, a high priority queue directly sends data; secondly, a low priority queue chooses to retreat or send the data again due to the fact that whether the high priority queue is succeed in sending the data or not; and finally, whether the data is sent or not is determined according to the number of queues to be sent in nodes. A simulation result proves that the method of disposing the internal collision of the enhanced distributed channel access has the advantages of reducing time delay of sending the data through the nodes, guaranteeing the throughput of business, simultaneously satisfying service quality need of time delay from the business, reducing outer collision probability of sending the data through the nodes, reducing the number of failures caused by outer collision during the link transmitting of the data and improving the property of a communication network.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for processing internal collisions in Enhanced Distributed Channel Access (EDCA) in the field of wireless local area networks. The present invention can reduce link transmission time, improve the probability of successfully sending data packets, and effectively improve the performance of the wireless local area network under the premise of ensuring service throughput in the wireless local area network. Background technique [0002] At present, with the application of wireless local area network more and more widely, people begin to expect that wireless local area network can provide service quality guarantee like wired network. However, due to the low wireless channel rate, high error rate and difficult detection of collisions, it has been difficult for WLANs to provide quality of service guarantees. For this reason, the IEEE802.11 protocol group has gone th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04W72/12
Inventor 李长乐郝帅蔡雪莲刘会影陈睿
Owner XIDIAN UNIV
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