Method and device for data transmission

Abstract

The embodiment of the present application provides a method and device for data transmission, which can map independent decoding and feedback data on at least two subbands when the channel detection bandwidth is inconsistent with the carrier bandwidth or data transmission bandwidth of the system , so that the channel access probability can be improved, and the data transmission delay on the unlicensed spectrum can be reduced. The method includes: the first device determines a first time-frequency resource for transmitting first data, the first time-frequency resource occupies resources in at least two subbands in the frequency domain, and the at least two subbands include the first subband and the second sub-band, the first data is data obtained by encoding an original information block, the original information block is a transport block carried by a physical channel, the first data includes first sub-data and second sub-data, and the first The resources occupied by a time-frequency resource on the first subband are used to transmit the first sub-data, and the resources occupied by the first time-frequency resource on the second sub-band are used to transmit the second sub-data; A device performs channel detection on the at least two subbands to determine the subbands available to the first device in the at least two subbands; the first device occupies the available subbands through the first time-frequency resource resources to send the first data to the second device.

Description

technical field [0001] The embodiments of the present application relate to the communication field, and more specifically, to a data transmission method and device. Background technique [0002] In the Licensed-Assisted Access (LAA-LTE) system based on Long Term Evolution (LTE), the carrier on the licensed spectrum is used as the main carrier, so as not to use the carrier on the licensed spectrum as a secondary carrier for terminal equipment Provide services, in which, on the unlicensed spectrum, the communication device follows the principle of "Listen Before Talk (LBT)", that is, the communication device needs to perform channel detection before sending signals on the channel of the unlicensed spectrum. The communication device can only send signals when the channel detection result shows that the channel is idle; if the channel detection result of the communication device on the channel of the license-free spectrum shows that the channel is busy, the communication device...

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Problems solved by technology

[0003] When the New Radio (NR) technology is applied to the unlicensed carrier, since the carrier bandwidth supported by NR can reach up to 400MHz, the channel detection bandwidth may be inconsistent with the carrier bandwidth / data transmission bandwidth, for example, assuming that the channel When the detection bandwidth is 20MHz and the carrier bandwidth / data transmission bandwidth is 80MHz, the data transmission bandwidth may be 40MHz, but the channel detection is only successful at 20MHz. In this case, how to carry out data transmission is a worthwhile task. research question

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