Wireless communication CSMA/CA optimization method based on hardware performance adjustment

A hardware performance, wireless communication technology, applied in the field of wireless communication CSMA/CA optimization, can solve the problem of not considering the bad influence of hardware initialization time reply frame, signal conflict, channel idle and other problems, achieve obvious hardware performance problems and increase the proportion , reduce the effect of conflict phenomenon

Pending Publication Date: 2022-05-31
QINGDAO EASTSOFT COMM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During this period of time, no wireless signal is sent out, causing other modules or nodes to misjudge that the channel is idle, and if it is ready to send, it will cause signal conflict
In addition, the receiving end will automatically reply to confirm after receiving the message. The sending of the reply message also needs initialization time, but because the receiving end module needs to process a lot of information, there is no time to back off and wait by default, so the reply frame is directly replied without backing off , resulting in a greater risk of conflict
[0004] To sum up, the existing CSMA / CA algorithm processing is relatively general, and the design does not consider the hardware initialization time and the bad influence caused by the reply frame.

Method used

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  • Wireless communication CSMA/CA optimization method based on hardware performance adjustment
  • Wireless communication CSMA/CA optimization method based on hardware performance adjustment
  • Wireless communication CSMA/CA optimization method based on hardware performance adjustment

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Embodiment 1

[0036] When the wireless communication module is running wireless communication, the module needs to send data frequently to the agent node module according to the program requirements. From preparing to send to successful sending, the wireless communication hardware module needs to pass an initialization time ranging from 220us to 352us (positive correlation with the length of the data to be sent, and also related to the hardware performance) before sending the corresponding wireless signal. The time that the signal exists in space is positively correlated with the length of the signal. When two or more wireless signals coexist in space, the signals collide and the signals are invalid. The source of the signal in the space mainly comes from the data transmission of each sub-node module and the data reply of the receiving module. After the wireless signal is sent, the signal strength in the space increases. Accordingly, before the signal is sent, the signal strength detection ...

Embodiment 2

[0067] Embodiment 2 of the present invention provides an optimization method for wireless communication CSMA / CA based on hardware performance adjustment, the steps of which are the same as those of Embodiment 1, and the difference from Embodiment 1 is that in this embodiment, the calculation of the first random time The method is different.

[0068] When sending modules in batches, the initial window of all modules is relatively small. Although there is a random number n1, the optional range of n1 value is relatively small. The coefficients obtained from random numbers are easy to be the same, and it is easy for multiple modules to almost back off together. Check whether the channel is occupied. If the result of the channel being idle is also obtained, this part of the module will be ready to send at the same time, resulting in a conflict situation. In order to solve this problem, for the situation that the modules are sent intensively at the time of startup, and the window is...

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Abstract

The invention belongs to the technical field of wireless communication, and discloses a wireless communication CSMA / CA optimization method based on hardware performance adjustment, and the method comprises the following steps: S1, when a wireless message is ready to be sent, obtaining a first random time according to the minimum backoff time, carrying out backoff, and then entering a step S2; s2, judging whether a current channel is idle or not, if not, entering step S3, and if yes, entering step S4; s3, acquiring second random time according to the current window CW, performing back-off according to the second random time, then adjusting the size of the window CW, and returning to the step S2; and S4, carrying out fixed time PCStime back-off, then reading the signal value of the current channel, judging whether the current channel is idle or not, if not, returning to the step S3, and if yes, ending back-off, preparing to send, and adjusting the size of the window CW. According to the method, a back-off mechanism is improved for hardware performance, the CSMA / CA algorithm is optimized, and the method is more suitable for the actual purpose of a real wireless transmission scene.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an optimization method for wireless communication CSMA / CA based on hardware performance adjustment. Background technique [0002] The CSMA / CA algorithm used in wireless communication is mainly used in the MAC layer, which plays an important function when the media medium is accessed, and when multiple nodes detect the channel strength at the same time and prepare for transmission. It performs time domain allocation, realizes the time-sharing transmission of frames, avoids wireless signals overlapping in space, and avoids wireless information collision and conflict. In addition, the CSMA / CA algorithm applied in wireless communication is mainly used to determine whether to transmit or not when multiple modules or nodes transmit. The specific usage method is that when the module or node that needs to send wireless information detects that the channel is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/08H04W24/02
CPCH04W74/0816H04W24/02Y02D30/70
Inventor 崔健胡小晔张昌雨袁娟赵文勇
Owner QINGDAO EASTSOFT COMM TECH
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