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Method for solving inter-frequency interference in wireless data transfer

A wireless data transmission, same-frequency technology, applied in transmission systems, transmission noise suppression, electrical components, etc., can solve the problem of not fundamentally solving the same frequency signal interference, to overcome the signal interference between the same frequency radio frequency and solve the same frequency interference Effect

Inactive Publication Date: 2008-01-16
MIDEA GRP CO LTD
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Problems solved by technology

However, this method only weakens the same-frequency signal interference, but does not fundamentally solve the problem of same-frequency signal interference

Method used

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  • Method for solving inter-frequency interference in wireless data transfer

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] See Figure 1, there is only one master communication device in the figure, any slave device needs to send its own data, it must first send a request to the master device, and the slave device can send its own data only after the request is allowed. If the request is not answered or allowed by the master device within the specified time, the slave device waits for a random period of time before sending the request. The slave adopts this method until its own data is sent.

[0012] Referring to Figure 2, if at a certain moment, slave device 1 and slave device 2 send Request1 and Request2 requests to the master device at the same time, that is, signal interference occurs, and the master device finds that it has received two Request requests or garbled characters, so Do not respond to ACK1 and ACK2. The slave device 1 and the slave device 2 wait unt...

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Abstract

A method for resolving the same frequency interference of wireless data transmission comprises more than two communication equipments which are divided into a principal equipment and a subordinate equipment group. The data transmission is done only between the principal equipment and the subordinate equipments, and can not be done directly between the subordinate equipments. The transfer of data transmission between the subordinate equipments can only be transferred by the principal equipment. The principal equipment does not give response for any signals when two or more subordinate equipments send a message to the principal equipment at the same time. Each subordinate equipment waits for a period of time and re-sends a message to the principal equipment. The principal equipment gives response only when receiving one signal. Compared with the prior art, the invention prevents the principal equipment from receiving more than one signals for the subordinate equipment at the same time so that the principal equipment can give response, and same frequency interference of wireless data transmission gets resolved.

Description

technical field [0001] The invention relates to a method for solving the same-frequency interference in wireless data transmission of multiple devices, and belongs to the technical field of wireless radio frequency communication. Background technique [0002] There are generally two existing wireless transmission methods: infrared transmission and radio frequency transmission. The infrared transmission distance is generally the visual distance, and it is a straight-line one-way propagation type, and the interference between signals is small. The transmission distance of radio frequency is longer, non-directional, and can be transmitted in two directions, but there will be strong interference between radio frequencies of the same frequency. At present, these two wireless transmission methods have been widely used in various industries. Judging from the current trend, the application range of radio frequency will be expanded, but the interference between radio frequency of t...

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Application Information

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IPC IPC(8): H04B1/10H04B15/00
Inventor 兰勇张东黄松青张虎胡威
Owner MIDEA GRP CO LTD
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