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Data transmission method and device, and related equipment

A data transmission method and data technology, applied in the field of communication, can solve problems such as large transmission delay

Inactive Publication Date: 2018-08-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current LTE air interface completes the mapping of data services to physical channels in a layered manner. The MAC layer uses HARQ technology to achieve low packet error rate transmission. However, due to the introduction of feedback and retransmission, the transmission delay is often large.

Method used

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  • Data transmission method and device, and related equipment
  • Data transmission method and device, and related equipment
  • Data transmission method and device, and related equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Step a: the base station selects an appropriate modulation and coding scheme and repetition times according to the channel conditions of the UE;

[0121] The candidate modulation and coding methods in step a.1 can be shown in Table 1;

[0122] Table 1

[0123] Modulation

code rate

QPSK

1 / 12，1 / 6，1 / 3

16QAM

1 / 12，1 / 6，1 / 3

[0124] The base station divides the levels according to the CQI reported by the UE, and judges the CQI level of the UE to select an appropriate modulation and coding method; the specific corresponding relationship is shown in Table 2:

[0125] Table 2 Correspondence between CQI levels and MCS schemes

[0126] CQI level

MCS program

1-2

Using QPSK, the code rate is 1 / 12

3-4

Using QPSK, the code rate is 1 / 6

5-6

Using QPSK, the code rate is 1 / 3

7-9

Using 16QAM, the code rate is 1 / 12

10-12

Using 16QAM, the code rate is 1 / 6

13-15

Using 16QAM, the co...

Embodiment 2

[0163] Steps a to c in this embodiment are the same as steps a to c in embodiment 1; this embodiment is uplink transmission;

[0164] Step d: the base station issues a UL grant;

[0165] In this embodiment, it is uplink transmission, the sending end is the UE, and the receiving end is the base station;

[0166] The base station sends the UL grant through PDCCH signaling;

[0167] The UL grant includes:

[0168] Transmission time unit indication, including the transmission time unit type and the location of the transmission time unit;

[0169] PUSCH frequency resource location;

[0170] MCS;

[0171] HARQ related parameters: NDI, HARQ process number, RV;

[0172] The transmission time unit indication in the UL grant is specified by step c, and the PUSCH frequency position is determined by the base station according to a certain scheduling rule according to the channel state of the UE, and the scheduling rule can be priority scheduling when time delay expires, proportional ...

Embodiment 3

[0183] Step a of this embodiment is the same as step a in embodiment 1; the value of the repeatingTrans-Index field in step b of this embodiment is 00 or 01 or 10, that is, the number of repetitions is 1, 2, or 4 times, and the rest of the specific operations are the same as in the embodiment Step b in 1 is the same; this embodiment is downlink transmission;

[0184] Step c: the base station determines multiple transmission time units for transmitting UE data, and outputs a transmission time unit indication;

[0185] The transmission unit type used in this implementation is discontinuous TTI, and the repetition times are 1, 2, and 4 times. When repeating 1 time, the base station schedules once for each TTI and allocates one TTI to transmit data; when repeating 2 transmissions, the base station schedules two TTIs once, and allocates 2 TTIs at a time; when repeating 4 transmissions, the base station schedules 4 TTIs once , allocating 4 TTIs for data transmission at a time;

[...

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Abstract

The invention discloses a data transmission method and device, and related equipment, relating to the technical field of communication and used for designing repeated transmission-based small packet transmission meeting requirements of latency and reliability of ultra-reliable and low-latency communications (URLLC). The method comprises the steps of configuring the number of times of repeated transmission and notification signaling for data transmission, wherein the number of times of repeated transmission comprises a preset number of times N or self-selected number of times, N is a positive integer, the self-selected number of times is corresponding to the number of times of repeated transmission of a transmitting end when the transmitting end transmits data to a receiving end repeatedlytill the receiving end feeds back ACK information or the number of times of transmission reaches a maximum max_tx; and transmitting data in a preset manner according to the number of times of repeatedtransmission.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a data transmission method, device and related equipment. Background technique [0002] Facing the business needs of mobile Internet and Internet of Things in 2020 and the future, the fifth generation mobile communication (5G) has become a global R&D hotspot. In the 5G concept white paper released in 2015, Ultra-Reliable and Low-Latency Communications (URLLC, Ultra-Reliable and Low-Latency Communications) set extremely high requirements for latency and reliability. Because in most cases, the data transmission rate is relatively stable, in order to realize the service of ultra-reliable communication, the highest level of reliability and the shortest delay are required to ensure the best user experience or service activation. [0003] The low-latency high-reliability scenario is mainly for the special application requirements of the Internet of Vehicles, industrial c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04L1/00H04W72/04
CPCH04L1/0003H04L1/0009H04L1/0027H04L1/1607H04L1/1825H04W72/23
Inventor 韩祥辉刘婷戴曼费泽松夏树强
Owner ZTE CORP
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