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Scheduling-based retransmission implementation method and device, base station and user equipment

A technology for retransmission and user equipment, which is applied in the directions of multiple use of transmission paths, sub-channel allocation of transmission paths, digital transmission systems, etc. Effect

Active Publication Date: 2019-10-18
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

Therefore, for multiple users using non-orthogonal multiple access technology for scheduling-free transmission, if scheduling-based retransmission is performed, scheduling grants need to be sent to multiple users separately, resulting in waste of control channel resources

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  • Scheduling-based retransmission implementation method and device, base station and user equipment
  • Scheduling-based retransmission implementation method and device, base station and user equipment
  • Scheduling-based retransmission implementation method and device, base station and user equipment

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Embodiment Construction

[0061] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0062] An embodiment of the present invention provides a method for implementing retransmission based on scheduling, and the method is applied to a base station, such as image 3 As shown, the method includes:

[0063] S11. The base station sends the same uplink scheduling grant to at least one user equipment by using DCI (Downlink Control I...

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Abstract

The invention provides a scheduling-based retransmission implementation method and device, a base station and user equipment. At a base station side, the method comprises: sending the same uplink scheduling grant to at least one user equipment by using DCI scrambled by a group identifier, the uplink scheduling grant comprising: a bitmap, each bit in the bitmap being in one-to-one correspondence with a DMRS in a DMRS pool; wherein the time-frequency domain information is used for indicating a time-frequency domain resource range for scheduling-based retransmission; wherein the group identifieruniquely corresponds to one time-frequency resource in a time-frequency resource pool. The resource waste of the control channel can be reduced, and the system resource utilization rate is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular to a method, device, base station and user equipment for implementing scheduling-based retransmission. Background technique [0002] During the standardization process of Release 15, 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) reached an agreement after discussions to support uplink transmission (configured grant UL transmission) based on scheduling-free. For scheduling-free uplink transmission, when there is data to be sent, the user does not need to send an uplink scheduling request in advance, and can directly send data on the scheduling-free uplink transmission resource. Scheduling-free uplink transmission is divided into two types, among which type I is only RRC (Radio Resource Control, radio resource control) configuration type, that is, all parameters related to scheduling-free uplink transmission are configured by ...

Claims

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Application Information

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IPC IPC(8): H04W72/12H04L5/00
CPCH04W72/121H04L5/0053H04W72/23
Inventor 曲鑫黄甦
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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