A method and device for data transmission in a wireless cellular network
A wireless cellular and transmission method technology, applied in wireless communication, electrical components, etc., can solve problems such as communication conflicts, low communication success rate and system reliability at both ends, and achieve the goal of increasing success rate, avoiding communication conflicts, and smoothing communication load Effect
Active Publication Date: 2020-03-20
SPREADTRUM COMM (SHANGHAI) CO LTD
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[0003] However, when using the above-mentioned communication method to transmit data, since the carrier sense to confirm that the channel is idle at the sending end, the channel near the receiving end may not be idle, so there may be communication conflicts, the success rate of communication at both ends and the reliability of the system low problem
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[0038] At present, according to the communication mode in the wireless cellular network, before sending data to the receiving end, the sending end monitors whether the channel is in an idle state, and starts to send data when the channel is in an idle state.
[0039] However, since there is a hidden node C that is visible to the receiving end A but invisible to the sending end B, when the hidden node C sends information to the receiving end A, the sending end B does not detect the hidden node C, and also sends information to the receiving end B. End A sends data, in other words, the sending end B and the hidden node C will send data to the receiving end A at the same time, so it will cause signal data conflicts, and eventually cause the data that the sending end B to send to the receiving end A to lose. Therefore, when using the above-mentioned communication method to transmit data, since the sending end cannot detect the existence of other nodes during the process of sending d...
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A data transmission method and device in a wireless cellular network, the method comprising: sending a data transmission request frame when detecting that the IoT communication shared channel is in an idle state for a preset first duration; When the request reply frame corresponding to the data transmission request frame is received within the preset second time period after the sending request frame is sent, when the second time period after receiving the request reply frame, through the The Internet of Things communication shared channel, sending the data in the form of an information frame, the information frame including the second identity information of the terminal to be sent; receiving the same information within the second time period after the information frame is sent The information frame corresponds to a response data frame, and when the response data frame indicates that the transmission of the information frame is correct, it is determined that the transmission of the data is completed, and the first duration is longer than the second duration. By adopting the above solution, communication conflicts during data transmission in the wireless cellular network can be avoided.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a data transmission method and device in a wireless cellular network. Background technique [0002] At present, according to the communication mode in the wireless cellular network, before the sending end sends data to the receiving end, the carrier senses whether the channel is in an idle state, and when the channel is in an idle state, data transmission starts. [0003] However, when using the above-mentioned communication method to transmit data, since the carrier sense to confirm that the channel is idle at the sending end, the channel near the receiving end may not be idle, so there may be communication conflicts, the success rate of communication at both ends and the reliability of the system low problem. Contents of the invention [0004] The problem solved by the invention is how to avoid the communication conflict in the data transmission process in the wireless ...
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IPC IPC(8): H04W72/12H04W74/08
CPCH04W74/0816H04W72/54
Inventor 顾祥新师延山简相超虞华伟
Owner SPREADTRUM COMM (SHANGHAI) CO LTD