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A direct link transmission method and terminal
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A link transmission and terminal technology, which is applied in the direct link transmission method and the terminal field, can solve the problems of poor transmission reliability of the direct link, and achieve the effect of improving transmission reliability
Active Publication Date: 2021-10-26
DATANG MOBILE COMM EQUIP CO LTD
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[0003] Embodiments of the present invention provide a direct link transmission method and a terminal to solve the problem that the transmission reliability of the direct link is relatively poor
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[0233] The signaling flow chart can be as follows image 3 Shown:
[0234] Wherein, the parameters M and N may be stipulated in the protocol, or configured by the network equipment (for example: through the system broadcast message SIB, RRC dedicated signaling) or pre-configured to the first terminal (N may be a value or a set).
[0235] The first terminal sends the first information to the second terminal, and receives the feedback result of the first information sent by the second terminal. When the feedback result is NACK or no feedback information is received, the first terminal retransmits the first information to the second terminal. information;
[0236] Wherein, after the first terminal receives NACK feedback for M times, the sum of the number of times that the first terminal receives NACK and the number of times of not receiving feedback information reaches M, or the number of times that the first terminal does not receive feedba...
[0255] The specific signaling flow chart can be as follows Figure 4 Shown:
[0256] The parameters M and N can be specified by the standard, or configured by the network equipment (via the system broadcast message SIB, RRC dedicated signaling) or pre-configured to the first terminal (N can be a value or a set)
[0257] The first terminal sends the first information to the second terminal 1 and the second terminal 2, and receives the feedback results of the first information sent by the second terminal 1 and the second terminal 2, when at least one of the feedback results is NACK or When no feedback information is received, the first terminal retransmits the first information to the second terminal 1 and the second terminal 1 .
[0258] by Figure 4 In , as an example, the second terminal 1 receives an error, and the second terminal 2 receives it correctly. However, because it is a multicast message, as long as one of the feedback info...
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Abstract
Embodiments of the present invention provide a direct link transmission method and terminal. The method includes: a first terminal determines, according to a feedback result, to perform N transmissions of first information, where the feedback result is that the second terminal is directed to the first terminal For the feedback result of feedback of the information sent to the second terminal on the through link, N is a positive integer greater than or equal to 1; the first terminal transmits N times to the second terminal on the through link the first information. The embodiments of the present invention can improve the transmission reliability of the direct link.
Description
technical field [0001] The present invention relates to the field of communication technologies, and in particular to a direct link transmission method and a terminal. Background technique [0002] The new air interface (New Radio, NR) vehicle to everything (V2X) technology introduces a new unicast communication mode and a multicast communication mode in addition to the original broadcast communication mode. Since the broadcast communication mode does not require feedback, the current NR V2X technology does not support feedback. Since there is no feedback in this way, the transmission reliability of the direct link (Sidelink) is relatively poor. Contents of the invention [0003] Embodiments of the present invention provide a direct link transmission method and a terminal to solve the problem of relatively poor transmission reliability of the direct link. [0004] An embodiment of the present invention provides a direct link transmission method, including: [0005] The f...
Claims
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Application Information
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