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Adaptive determinacy back-off method and system of MAC layer in wireless distributed network

A distributed network and self-adaptive technology, applied in wireless network protocols, transmission systems, wireless communications, etc., can solve problems such as poor user experience, decreased transmission success rate, and increased energy consumption, and achieve improved throughput and successful transmission probability, reduce transmission energy consumption, and improve system performance

Inactive Publication Date: 2015-11-25
SHANGHAI RES CENT FOR WIRELESS COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an adaptive deterministic backoff method and system for the MAC layer in a wireless distributed network, which is used to solve the problem of the backoff algorithm in the prior art when the number of stations is large or When the load is high, collisions will intensify, and the success rate of sending will drop significantly, which will lead to problems such as increased delay, increased energy consumption, waste of resources, and poor user experience.

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  • Adaptive determinacy back-off method and system of MAC layer in wireless distributed network
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  • Adaptive determinacy back-off method and system of MAC layer in wireless distributed network

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Embodiment 1

[0047] This embodiment provides an adaptive deterministic backoff method for a MAC layer in a wireless distributed network. The wireless distributed network includes several stations, and the several stations share a transmission channel for transmitting data packets. see figure 1 , shown as a flow diagram of an adaptive deterministic backoff method at the MAC layer in a wireless distributed network. Such as figure 1 As shown, the adaptive deterministic backoff method of the MAC layer in the wireless distributed network includes the following steps:

[0048] S1, judging whether there is a data packet that needs to be sent at the i-th station; if so, proceed to the next step, that is, step S2; if not, then execute step S3, that is, perform a backoff window value on the backoff window value in the i-th station In the update operation, after step S3 is executed, return to step S1; wherein, i is a positive integer greater than or equal to 1. In this step, the update operation o...

Embodiment 2

[0063] This embodiment provides an adaptive deterministic backoff system 10 for the MAC layer in a wireless distributed network. The wireless distributed network includes several stations, and the several stations share a transmission channel for transmitting data packets. see image 3 , is shown as a schematic diagram of the principle structure of an adaptive deterministic backoff system at the MAC layer in a wireless distributed network. Such as image 3 As shown, the adaptive deterministic backoff system 10 of the MAC layer in the wireless distributed network includes a first judgment module 101, a first listening module 102, an updating module 103, a backoff control module 104, a second listening module 105, A sending module 106 , an operating module 107 , a second judging module 108 , and a discarding module 109 .

[0064]The first judging module 101 is used to judge whether there is a data packet that needs to be sent at the i-th station; if so, call the first listenin...

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Abstract

The invention provides an adaptive determinacy back-off method of an MAC layer in a wireless distributed network. The method comprises the steps as follows: step 1, judging whether the No. (i)i( / i) site has a data package needing to transmit; continuing to execute the next step if the No. (i)i( / i) site has a data package needing to transmit, otherwise, executing back-off window value updating operation to an back-off window value in the No. (i)i( / i) site; step 2, executing first monitoring channel to judge whether a transmission channel is leisure, and executing the back-off operation if the transmission channel is leisure and executing second monitoring channel; otherwise, executing second back-off operation and returning to the second monitoring channel, wherein the second back-off operation comprises the back-off window value updating operation; step 3, executing the second monitoring channel to judge whether the transmission channel is leisure, and transmitting the data package needing to transmit out if the transmission channel is leisure, and executing the follow-up operation related to the transmission, and otherwise, returning and executing the second back-off operation. The method of the invention realizes a back-off mechanism of the determinacy, effectively avoids the collision of the data package, and effectively improves the throughput capacity and transmission success rate of a network system.

Description

technical field [0001] The invention belongs to the technical field of mobile communication networks, and relates to a back-off method and system, in particular to an adaptive deterministic back-off method and system of a MAC layer in a wireless distributed network. Background technique [0002] Existing wireless distributed network MAC layer standards mostly use Carrier Sense Multiple Access / Collision Avoidance (Carrier Sense Multiple Access with Collision Avoidance, CSMA / CA) protocol. In a contention-based distributed wireless network, all stations first perform carrier sense before sending data packets, that is, they need to detect whether the channel is in an idle state. If the channel is idle, the station waits for a certain period of time before sending the data packet. It is also necessary to listen to the channel status during the sending process. If a collision is detected, the sending process will stop immediately, and try again after waiting for a period of time...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04W80/02H04L1/18
CPCH04L1/187H04W74/085H04W80/02
Inventor 宋冠男杨旸张武雄
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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