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Information transmission method and device, terminal, base station and storage medium

A technology of information transmission and base station, which is applied in the field of communication, can solve the problem of PDCCH demodulation performance degradation and achieve the effect of improving demodulation performance

Active Publication Date: 2022-02-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The embodiment of this application provides an information transmission method, device, terminal, base station and storage medium to solve the demodulation performance of the PDCCH of the Redcap UE in the prior art Reduced technical issues

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  • Information transmission method and device, terminal, base station and storage medium
  • Information transmission method and device, terminal, base station and storage medium
  • Information transmission method and device, terminal, base station and storage medium

Examples

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example 1

[0240] In this embodiment, the PDCCH carries PDCCH retransmission indication information (PDCCH RepK), and the indication information is used to update the number of PDCCH retransmission times. The UE can determine the time window for receiving the PDCCH after determining the number of PDCCH transmissions. The UE improves the PDCCH demodulation performance by combining the PDCCHs within the receiving window. The size of the PDCCH time window is related to RepK, Figure 6 is a schematic diagram of a DCI-indicated PDCCH repetition mechanism provided by an embodiment of the present application, as shown in Figure 6 shown. If RepK=2, the terminal starts to divide the PDCCH MO into a group according to the m PDCCH MO from the first PDCCH MO after the OFDM symbol where the acknowledgment information ACK is sent plus a certain time, and receives according to the m PDCCH MO as a group PDCCH. There are two methods for counting m PDCCH MOs, as follows:

[0241] Method 1: Continuou...

example 2

[0277] In this embodiment, the repeated transmission instruction information (PDCCH RepK) sent by the MAC CE is carried on the PDSCH, and the instruction information is used to update the number of repeated transmissions of the PDCCH. The UE determines the number of PDCCH transmissions so that it can determine the time window for receiving the PDCCH, Figure 12 is a schematic diagram of the PDCCH repetition mechanism based on the MAC CE indication provided by the embodiment of the present application, as shown in Figure 12 As shown, the specific PDCCH retransmission update mechanism is as follows:

[0278] (1) The gNB sends PDCCH repeated transmission indication information RepK=2 in the PDSCH scheduled by PDCCH MO i to update the current 1 transmission to 2 repeated transmissions.

[0279] (2) gNB will implement RepK=2 on the first PDCCH MO after adding T to the OFDM symbol where the terminal sends confirmation information. After RepK=2 takes effect in PDCCH MO j, gNB will ...

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Abstract

Embodiments of the invention provide an information transmission method and device, a terminal, a base station and a storage medium. The method comprises the following steps: receiving PDCCH repeated transmission indication information according to a default number of times of PDCCH repeated transmission, wherein the PDCCH repeated transmission indication information is determined by the base station according to current channel quality; and receiving the PDCCH information according to the PDCCH repeated transmission indication information. According to the information transmission method and device, the terminal, the base station and the storage medium provided by the embodiments of the invention, the base station sends the PDCCH repeated transmission indication information to the terminal according to the current channel quality, and the terminal receives the PDCCH information according to the PDCCH repeated transmission indication information, so the number of times of PDCCH repeated transmission can be adaptively adjusted, and the demodulation performance of the PDCCH is improved.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to an information transmission method, device, terminal, base station, and storage medium. Background technique [0002] The R17 standard newly introduces reduced capability NR devices (Reduced capability NR devices, referred to as "Redcap UE"). Redcap UE is based on 5G general-purpose terminal UE, which has been tailored in terms of capability or complexity. [0003] The 5G base station (gNB) provides UE scheduling information on the Physical Downlink Shared Channel (PDSCH) through the Physical Downlink Control Channel (PDCCH). The 5G base station will schedule a PDSCH through the PDCCH and send it to the UE, and the UE will feed back the HARQ-ACK information according to whether the PDSCH is decoded correctly. [0004] The demodulation performance of the PDCCH will decrease due to the reduction of the number of antennas of the Redcap UE, and it is necessary...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L1/18H04W28/04
CPCH04L5/0053H04L1/18H04W28/04H04L5/00
Inventor 周雷邢艳萍王磊高雪娟林祥利
Owner DATANG MOBILE COMM EQUIP CO LTD