Data transmission method and device based on unlicensed spectrum
A data transmission method and a technology of a data transmission device, which are applied in the field of data transmission devices based on unlicensed spectrum, and can solve problems such as occupancy, reduced terminal uplink spectrum utilization rate, and low channel utilization rate
Active Publication Date: 2018-08-28
MEIZU TECH CO LTD
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Problems solved by technology
[0005] When the terminal needs to transmit data through the unlicensed spectrum, if the dynamic scheduling method in the current LTE system is applied to the LAA system of the unlicensed spectrum, the utilization rate of the uplink spectrum of the terminal will be reduced. After receiving the UL-grant instruction from the eNodeB, it is necessary to perform CCA detection on the frequency resource indicated by the UL-grant first, and the frequency resource can only be occupied when the channel is detected to be idle
CCA detection also needs to occupy a certain amount of time resources. For example, in the LBE (Load based equipment) method commonly used in CCA detection, the time spent on channel detection is often as high as hundreds of microseconds. If the current LTE system is still used In the dynamic scheduling method, the terminal can only send 1 millisecond of data each time it receives the UL-grant, and the channel utilization will be very low
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[0033] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0034] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.
[0035] figure 1 A schematic flowchart of a data transmission method based on an unlicensed spectrum according to an embodiment of the present invention is shown.
[0036] like figure 1 As shown, t...
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The present invention provides a data transmission method and device based on an unlicensed spectrum, wherein the data transmission method based on an unlicensed spectrum includes: receiving an uplink scheduling instruction sent by a base station; determining the uplink scheduling instruction according to the uplink scheduling instruction The base station allocates frequency resources on the unlicensed spectrum for the terminal; detecting whether the channel on the frequency resource is in an idle state; when detecting that the channel on the frequency resource is in an idle state, continuously occupying the frequency resource on the channel to transmit uplink data to the base station. Through the technical scheme of the present invention, when it is detected that the channel of the unlicensed spectrum is idle, the channel of the unlicensed spectrum can be continuously occupied to transmit uplink data, the detection time of the channel of the unlicensed spectrum is reduced, and the process of transmitting the uplink data of the terminal is improved. The channel utilization rate of the unlicensed spectrum also improves the transmission efficiency of uplink data.
Description
technical field [0001] The present invention relates to the field of communication technology, in particular, to a data transmission method based on an unlicensed spectrum and a data transmission device based on an unlicensed spectrum. Background technique [0002] The 3GPP standard organization approved the LAA (Licensed-Assisted Access) research project based on LTE (Long Term Evolution, long-term evolution) in the TSG RAN#65 plenary session. This project mainly studies the unlicensed spectrum How to deploy LTE network, so as to achieve fair and effective use of unlicensed spectrum and improve the data transmission rate of LTE system. [0003] There are two ways for LTE to use unlicensed spectrum. One is: use unlicensed spectrum only in downlink data transmission; the other is: unlicensed spectrum can be used in both uplink and downlink data transmission. The time-division multiplexing method is on the same unlicensed carrier. This time-division multiplexing method is dif...
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IPC IPC(8): H04W72/04H04W16/10H04W72/12
CPCH04W16/10H04W72/21H04W72/542
Inventor 不公告发明人
Owner MEIZU TECH CO LTD