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Downlink transmission with two-stage feedback: early prediction-based feedback of physical downlink shared channel and hybrid automatic repeat request feedback

A technology of physical downlink sharing and channel, which is applied in the direction of error prevention/detection through transmission repetition, error prevention/detection using return channel, transmission system, etc., and can solve problems such as failure to meet target requirements

Pending Publication Date: 2021-01-29
JRD COMM (SHENZHEN) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large HARQ RTT may prevent the gNB from making a sufficient number of necessary retransmissions within the delay budget, resulting in failure to meet the target requirements

Method used

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  • Downlink transmission with two-stage feedback: early prediction-based feedback of physical downlink shared channel and hybrid automatic repeat request feedback
  • Downlink transmission with two-stage feedback: early prediction-based feedback of physical downlink shared channel and hybrid automatic repeat request feedback
  • Downlink transmission with two-stage feedback: early prediction-based feedback of physical downlink shared channel and hybrid automatic repeat request feedback

Examples

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Embodiment Construction

[0096] Those skilled in the art can recognize and understand that the specific details of the described examples are only for illustrating some embodiments, and the technical teachings described in this application are applicable to various alternative scenarios.

[0097] Figure 1 shows an example of a cellular network consisting of three base stations (eg eNB or gNB depending on the particular cellular standard and terminology). Typically, each base station will be deployed by a cellular network operator to provide geographic coverage for UEs in that area. These base stations form a radio area network (RAN). Each base station provides radio coverage for UEs in its area or cell. The base stations are interconnected through the X2 interface and connected to the core network through the S1 interface. It will be appreciated that only essential details are shown, in order to illustrate the main features of cellular networks.

[0098] Each base station includes hardware and soft...

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Abstract

A method of data transmission between a base station and a user equipment. The method comprises, for the base station: receiving, at the base station, data to be transmitted to the user equipment; transmitting the data to the user equipment; receiving a signal indicative of early prediction feedback from the user equipment. Based on the signal indicative of early prediction feedback, if the signalindicative of early prediction indicates DTX, retransmitting the data to the user equipment repeating the method from the step of receiving a signal indicative of early prediction feedback. If the signal indicative of early prediction indicates NAK, determining, whether a sufficient latency budget is available decided. If the budget is available, continuing the method at the step of receiving anHARQ feedback. If the budget is not available, retransmitting the data to the user equipment and repeating the method from the step of receiving a signal indicative of early prediction feedback. The method further comprises receiving an HARQ feedback and, if the HARQ feedback indicates NAK, retransmitting the data to the user equipment and repeating the method from the step of receiving a signal indicative of early prediction feedback. The method comprises, for the user equipment: receiving data from the base station; estimating an error probability based on at least a portion of the receiveddata; generating a signal indicative of early feedback based on the estimated error probability; and sending the signal indicative of early prediction feedback to the base station. A base station anda user equipment configured to perform the respective methods are also disclosed.

Description

technical field [0001] The present application relates to a downlink transmission with two-stage feedback: prediction-based physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) early feedback and hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ), especially a A transmission scheme that combines prediction-based early feedback and traditional hybrid automatic repeat request feedback, exploiting the advantages of both techniques and mitigating their disadvantages. Background technique [0002] Wireless communication systems, such as third generation (Third Generation, 3G) mobile phone standards and technologies are well known. This 3G standard and technology is formulated by the Third Generation Partnership Project (Third Generation Partnership Project, 3GPP). Third generation wireless communications are commonly developed to support macro cell mobile telephone communications. Communication systems and networks have evolved towards...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
CPCH04L1/1854H04L1/1887H04L1/189H04L1/08H04L1/16H04L1/1829H04L1/1867
Inventor 中坚·乐乌莫·萨利姆
Owner JRD COMM (SHENZHEN) LTD
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