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A data transmission method and device

A data transmission method and equipment technology, applied in the direction of digital transmission system, transmission system, baseband system components, etc., can solve the problems of poor demodulation performance at the receiving end, limited carrying capacity, and inability to perform coherent combination of multi-subframe channels

Active Publication Date: 2019-05-24
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited carrying capacity of the PUCCH structure in one subframe, the information after TB encoding needs to be divided into multiple subframes for transmission, resulting in different information transmitted in different subframes, and coherent combining cannot be performed.
[0017] To sum up, in the prior art, coherent combining cannot be performed when multi-subframe channel estimation is used in the process of data transmission between the sender and receiver, which leads to poor demodulation performance at the receiver when the frequency deviation between the sender and receiver

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0139] Embodiment 1: Assuming that the size of 1 TB is K=72 bits, it is transmitted in M=100 subframes, every group of N=4 subframes performs multi-subframe joint channel estimation, and transmits based on the PUCCH format2 structure, that is, adopts QPSK modulation, each subframe can transmit C=20-bit coded information (10 QPSK modulation symbols), occupying 1 physical resource block (PhysicalResource Block, PRB) for transmission, the specific data transmission structure is as follows image 3 As shown, IFFT represents the inverse fast Fourier transform, and the specific data transmission process is as follows:

[0140] sender:

[0141] Step 1: Coding

[0142] After the transmission block with a length of K=72 bits is subjected to turbo coding (or convolutional coding) and rate matching, the length bit-encoded sequence;

[0143] Step 2: Grouping

[0144] Approach 1: Grouping Bits

[0145] Divide the encoded sequence into groups, each containing K i = 20-bit coded inf...

Embodiment 2

[0172] Embodiment 2: Assuming that the size of one TB is K=72 bits, it is transmitted in M=450 subframes, and multi-subframe joint channel estimation is performed every group of N=4 subframes, and the transmission is performed based on the PUCCH format1b structure, that is, using QPSK modulation, each subframe can transmit C=2 bits of coded information (1 QPSK modulation symbol), occupying 1 PRB for transmission, the transmission structure is as follows Figure 5 As shown, the specific transmission process is as follows:

[0173] sender:

[0174] Step 1: Coding

[0175] After the transmission block with a length of K=72 bits is subjected to turbo coding (or convolutional coding) and rate matching, the length bit-encoded sequence.

[0176] Step 2: Grouping

[0177] Method 1: Grouping bit information

[0178] Divide the encoded sequence into groups, each containing K i = 2-bit coded information; for example, the 1st to 2nd bits are the first group, the 3rd to 4th bits a...

Embodiment 3

[0207] Embodiment 3: Assuming that the size of 1 TB is K=72 bits, it is transmitted in M=80 subframes, and multi-subframe channel estimation is performed in a group of N=8 subframes, and the transmission is performed based on the PUCCH format3 structure, that is, QPSK is used modulation, each subframe can transmit C=48-bit coded information (24 QPSK modulation symbols), occupying 1 PRB for transmission, and the transmission structure is as follows Figure 9 As shown, the specific transmission process is as follows:

[0208] sender:

[0209] Step 1: Coding

[0210] After the transmission block with a length of K=72 bits is subjected to turbo coding (or convolutional coding) and rate matching, the length bit-encoded sequence;

[0211] Step 2: Grouping

[0212] Approach 1: Grouping Bits

[0213] Divide the encoded sequence into groups, each containing K i = 48-bit coded information, for example, the 1st to 48th bits are the first group, the 49th to 96th bits are the seco...

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Abstract

Disclosed are a data transmission method and device, so that coherent combination can be performed during multi-subframe channel estimation when a sending end and a reception end transmit data, so as improve demodulation performance of the reception end when the sending end and the reception end are in frequency deviation. The data transmission method for a sending end provided in the present invention comprises: a sending end performs channel coding of transmission blocks according to a subframe group quantity obtained when grouping is performed according to total transmission subframes that need to be occupied for the current transmission blocks, so as to obtain a coded sequence; the sending end obtains multiple groups of quadrature amplitude modulation (QAM) symbols according to the subframe group quantity and the coded sequence; and the sending end sends the multiple groups of QAM symbols to a reception end by means of the multiple subframe groups, wherein each subframe in any subframe group repeatedly transmits a group of QAM symbols.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and equipment. Background technique [0002] Machine-to-machine (M2M, Machine-to-machine) communication is a new type of communication concept, and its purpose is to organically combine many different types of communication technologies, such as: machine-to-machine communication, machine control communication, human-computer interaction communication, Mobile Internet communication, thus promoting the development of social production and lifestyle. It is estimated that the business of human-to-human communication may only account for 1 / 3 of the entire terminal market in the future, and a larger amount of communication is the communication business between machines (small bandwidth systems). [0003] The current mobile communication network is designed for communication between people, for example: the determination of network capacity, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L1/00
CPCH04L25/02
Inventor 高雪娟邢艳萍沈祖康
Owner DATANG MOBILE COMM EQUIP CO LTD