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Data transmission method and device

A data transmission method and technology of a data transmission device, which are applied in the field of communication and can solve the problems of reducing interface bandwidth requirements and the like

Active Publication Date: 2022-06-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present application provides a data transmission method and device to solve the problem of how to meet the data transmission delay in the loose delay communication scenario, so that the data transmission can be carried out normally, and the re-segmentation of the base station interface can be used normally, reducing Interface Bandwidth Requirements

Method used

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  • Data transmission method and device
  • Data transmission method and device

Examples

Experimental program
Comparison scheme
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example 1

[0105] Example 1: HARQ prediction based on SINR~BLER mapping table (SINR~BLER curve is related to which order of MCS)

[0106] Specifically, the above step S102 includes:

[0107] The RU estimates a signal-to-interference-to-noise ratio according to the pilot signal estimation result of the uplink data;

[0108] The RU obtains the SINR according to the estimated SINR and the calibration deviation SINR of the SINR adj , calibrating the estimated SINR;

[0109] The RU obtains the BLER according to the at least one historical information, the calibrated SINR, and the mapping relationship between the SINR and the block error rate BLER;

[0110] The RU generates a predicted decoding result according to the obtained BLER.

[0111] In a specific implementation, the RU estimates a signal interference and noise ratio (signal interference and noise ratio, SINR) based on the pilot signal estimation result of the uplink data. The estimated SINR may have errors, and further, the estima...

example 2

[0113] Example 2: Machine Learning Classifier

[0114] Extract features (SINR, RB, Doppler, etc.) and use machine learning methods (such as linear regression, support vector machines, neural networks, etc.) to predict ACK / NACK.

[0115] ③ UL grant transmit

[0116] In this step, the MAC Agent of the RU determines how to deliver the scheduling information according to the predicted decoding result and the saved scheduling information.

[0117] The following lists describe them respectively, as shown in Table 1 below:

[0118] Table 1 The relationship between the predicted decoding result and the dispatched scheduling information

[0119]

[0120]

[0121] As shown in Table 1, "with or without scheduling" in Table 1 refers to the initial transmission scheduling determined by the MAC layer protocol stack module, excluding the adaptive retransmission scheduling part, and specifically refers to whether the investigated terminal has initial transmission scheduling .

[012...

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Abstract

The embodiment of the present application discloses a data transmission method and device. The method includes: the digital unit DU sends the first uplink scheduling information to the wireless unit RU; the DU receives the predicted decoding result from the RU; the DU receives the uplink data from the terminal, and executes the uplink data on the uplink data Decoding to obtain an actual decoding result; the DU performs error recovery on uplink data transmission according to the actual decoding result and the predicted decoding result. Corresponding devices are also disclosed. By predicting the decoding result and adjusting the scheduling information of data transmission according to the predicted decoding result, the reliability of data transmission is improved, so that the data transmission delay in loose delay communication scenarios can be satisfied, data transmission can be carried out normally, and This enables the re-segmentation of the base station interface to work normally and reduces the bandwidth requirements of the interface.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a data transmission method and apparatus. Background technique [0002] Common public radio interface (CPRI), as the mainstream interface type between digital unit (DU) and radio unit (RU), has been widely used in the forward direction of 2G / 3G / 4G base station products. Backhaul (fronthaul) network (referred to as "fronthaul network"). When the large bandwidth of 4.5G / 5G and the massive multi-input and multi-output (massive multi-input and multi-output, massive MIMO) technology appeared, the bandwidth of the CPRI interface was greatly improved. Massive MIMO has been supported up to 64T64R, which has led to a sharp increase in the amount of data in the time domain. The demand for interfaces has far exceeded the transmission capacity of most operators' sites, which greatly reduces the cost of commercial deployment and the availability of site transmission r...

Claims

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Application Information

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IPC IPC(8): H04W72/12
CPCH04W72/12H04L2001/0097H04L1/203H04L1/0019H04L1/0026H04L1/0016H04L1/1854H04B17/318H04L1/0003H04L1/1812H04L5/0055H04W72/1268H04W72/23
Inventor 唐志华
Owner HUAWEI TECH CO LTD
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