Method for automatically adjusting ACK timeout time

A technology of overtime and automatic adjustment, applied in electrical components, network topology, wireless communication, etc., can solve the problems of inaccurate results, large environmental impact, difficult operation, etc., and achieve the effect of good stability, simple algorithm, and easy operation.

Active Publication Date: 2014-01-29
江苏创通电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: how to provide an automatic adjustment method for the ACK timeout time, which does not directly adjust the ACK timeout time based on the communication distance, and overcomes that the setting and adjustment of the ACK timeout time in the prior art is greatly affected by the environment , Difficult operation and inaccurate results

Method used

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  • Method for automatically adjusting ACK timeout time
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  • Method for automatically adjusting ACK timeout time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a method for automatically adjusting the ACK timeout time of the client and the access point in a point-to-point communication network. In point-to-point communication, the ACK timeout adjustment method of the client and the access point is the same, such as figure 1 shown, including the following steps:

[0045] Step A, initialize the ACK timeout time and adjust the step size.

[0046] In this embodiment, the adjustment step is represented by step. The initial value of the ACK timeout time is set to 200 microseconds, which is about the time required for the signal to transmit 30 kilometers wirelessly. The initial value of step is set to 16 microseconds.

[0047] Step B, using the step size adjustment algorithm to determine the optimal ACK timeout time in the process of adjusting the step size convergence. Such as figure 2 As shown, step B is specifically implemented by performing the following steps:

[0048] B1. Set the maximum value L=4 ...

Embodiment 2

[0061] This embodiment provides the implementation of the present invention in a point-to-multipoint communication environment, specifically, one access point communicates with multiple clients. In this communication scenario, based on the ACK automatic adjustment method in the point-to-point communication environment described in Embodiment 1, this embodiment makes the following changes:

[0062] For the ACK timeout time set at the access point, after step B5 described in Embodiment 1, it also includes:

[0063] The access point takes the maximum value among the optimal ACK timeout times of all clients as the optimal ACK timeout time of the access point.

[0064] For the ACK timeout at the client, the adjustment process is the same as that described in Embodiment 1.

[0065] In addition to steps A, B, and C described in Example 1, it also includes:

[0066] Step D, managing the joining and exiting of clients, so that the ACK timeout value set at the access point is applicab...

Embodiment 3

[0071] This embodiment shows the test performance of the present invention in the actual environment. As shown in the table below:

[0072]

[0073] As can be seen from the above table, the test environment of this embodiment has both open suburbs and busy roads, as well as indoor environment. The performance of the present invention was tested from a number of different actual environments. It can also be seen that after the optimal ACK timeout time obtained by the method described in the present invention is converted into a spatial distance, the error with the actual distance can be controlled within ±0.3km, which fully demonstrates that in the process of adjusting an ACK timeout time, this The optimal ACK timeout time obtained by the method described in the invention is very accurate.

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Abstract

The invention discloses a method for automatically adjusting ACK timeout time and belongs to the technical field of wireless communication. The method includes the following steps: A, initializing the ACK timeout time and adjusting step length; B, utilizing a step length algorithm to determine optimal ACK timeout time in the process of convergence of the adjusting step length; C, after certain time, re-performing value assignment on the adjusting step length, executing step B, determining new optimal ACK timeout time, calculating a difference value between the new optimal ACK timeout time and the original optimal ACK timeout time, if the difference value is larger than a threshold value, quickly performing next-time ACK timeout time adjusting, and if the difference value is smaller than the threshold value, prolonging adjustment waiting time of next-time adjusting. The method is less influenced by reflection of radio waves and multipath effect in a communication environment and is high in estimating and adjusting accuracy of the ACK timeout time, low cost, small resource occupancy and high stability are realized, convergence can be realized quickly, manual setting is not needed, and operation is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an automatic adjustment method for ACK timeout time. Background technique [0002] At present, most long-distance wireless broadband bridge products are developed on the basis of 802.11 wireless LAN technology. The initial transmission range of 802.11 WLAN is 300 meters outdoors and 100 meters indoors. With the development of wireless communication technology, especially the introduction of MIMO technology, wireless products based on the 802.11 standard can be improved and installed with high-gain antennas to achieve long-distance wireless fixed access of tens of kilometers, or even hundreds of kilometers. This meets the data access needs of remote areas and special industries. Therefore, long-distance wireless broadband bridge products came into being. Compared with the traditional wired data network access, it has the characteristics of low cost, convenient in...

Claims

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Application Information

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IPC IPC(8): H04L1/08H04W84/12
Inventor 章程杨磊鲍雪刚何世健邓怀东
Owner 江苏创通电子股份有限公司
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