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A data transmission method and communication device

A data transmission method and data technology, applied in the field of communication, can solve the problems of insufficient utilization of frequency diversity gain, inability to meet reliability, etc.

Active Publication Date: 2022-04-12
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing schemes that support up to two transmissions cannot meet the reliability requirements, and the frequency domain resources used in the initial transmission and retransmission are the same, and the frequency diversity gain is not fully utilized.

Method used

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  • A data transmission method and communication device
  • A data transmission method and communication device
  • A data transmission method and communication device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0109] Please refer to Figure 4 , Figure 4 Different shaded patterns in , correspond to different UEs, the horizontal axis represents time, and the vertical axis represents frequency. The time domain interval and the frequency domain interval are respectively indicated in the interval indication information, the time domain interval SF of UE1, UE2, UE3 and UE4 time-gap The values ​​of are 1, 2, 3, 4 respectively, and the time domain interval of each UE is the same as the frequency domain interval.

[0110] Taking UE2 as an example (square shadow), suppose N subCH =4, the number of transmissions n=5, the time domain position of the initial transmission is time, the time domain position of the first retransmission (i.e. the second transmission) is The time domain position of the second retransmission (i.e. the third transmission) is The time domain position of the third retransmission (i.e., the fourth transmission) is

[0111] Similarly, the initial position of t...

example 2

[0113] Please refer to Figure 5 ,exist Figure 5 Different shaded patterns in , correspond to different UEs, the horizontal axis represents time, and the vertical axis represents frequency. Only the time domain interval is indicated in the interval indication information, but the UE's frequency domain interval and time domain interval satisfy the SF frequency-gap =SFtime-gap / K, the relation of K=2. Time domain interval SF of UE1, UE2, UE3 and UE4 time-gap The values ​​of are 2, 4, 6, 8 respectively.

[0114] Taking UE2 as an example (square shadow), suppose N subCH =4, the number of times of transmission n=5. The time domain position of initial transmission is time, the time domain position of the first retransmission (i.e. the second transmission) is The time domain position of the second retransmission (i.e. the third transmission) is The time domain position of the third retransmission (i.e., the fourth transmission) is

[0115] Similarly, the initial posi...

example 3

[0117] Please refer to Figure 6a and Figure 6b ,exist Figure 6a And in Figure b, the horizontal axis represents time, and the vertical axis represents frequency. Only the time domain interval is indicated in the interval indication information, the UE uses the method shown in formula 1 to determine the start position in the time domain, and uses the method shown in formula 4 to determine the start position in the frequency domain.

[0118] Suppose the maximum number of sub-channels N in the frequency domain resource pool subCH =8, the width L occupied by UE data subCH = 3, L subCH can be the number of subchannels actually occupied by PSCCH and PSSCH, then the number of available frequency resource blocks is N subCH -L subCH +1=6. The 6 frequency resource blocks indicate that there are 6 transmission modes for UE data in the frequency domain, that is, there are 6 frequency domain resource positions for selection. exist Figure 6a Among them, the available 6 frequency...

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Abstract

A data transmission method and communication device, applicable to the fields of V2X, intelligent networked vehicles, Internet of Vehicles, intelligent driving, unmanned driving, etc., the method includes: a first terminal device obtains transmission times n and interval indication information, and the interval indication The information indicates a time domain interval, a frequency domain interval, or a time domain interval and a frequency domain interval, and the first terminal device sends sideline control information to the second terminal device, where the sideline control information indicates the number of transmissions n, interval indication information and i, The first terminal device determines the first time-frequency resource used for sending the first data for the i-th time according to the transmission number n and the interval indication information, and sends the first data to the second terminal device on the first time-frequency resource. In this way, different time-frequency resources may be used in different transmission processes of the first data, so that the time and frequency diversity gain can be fully utilized, and the reliability of data transmission can be effectively improved.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a data transmission method and a communication device. Background technique [0002] Vehicle to everything (V2X) technology is a new generation of information and communication technology that can connect vehicles with everything, such as figure 1 As shown, V2X technology includes vehicle-to-vehicle communication (vehicle to vehicle, V2V), vehicle-to-pedestrian communication (vehicle to pedestrian, V2P), vehicle-to-infrastructure communication (vehicle to infrastructure, V2I), vehicle-to-network communication (vehicle to network, V2N), etc. [0003] In the existing V2X technology, a transmission block (transmission block, TB) only supports two transmissions at most, that is, an initial transmission and a retransmission, and the frequency domain resources used for the initial transmission and the retransmission are the same. Considering more and more compl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/46H04W72/04H04L5/00H04W4/40H04W72/54
CPCH04W4/46H04L5/0053H04W4/40H04W72/20H04L5/0078H04L5/0094H04L5/0005H04W72/02H04W72/0446H04W72/0453H04W72/542
Inventor 董蕾张锦芳卢磊
Owner HUAWEI TECH CO LTD
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