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A downlink data repeated transmission method and device

A technology for repeated transmission and downlink data, applied in the field of communication, which can solve the problems of different numbers of available REs and data that cannot be combined between subframes

Active Publication Date: 2019-06-28
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] Embodiments of the present invention provide a method and device for repeated downlink data transmission, which is used to solve the problem that data cannot be transmitted between subframes when data is repeatedly transmitted in multiple subframes due to the different number of available REs when performing resource mapping in different subframes. merge problem

Method used

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  • A downlink data repeated transmission method and device
  • A downlink data repeated transmission method and device
  • A downlink data repeated transmission method and device

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Experimental program
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Effect test

no. 1 approach

[0229] Processing method a, the subframe set is divided into multiple subframe groups, and the subframe group is processed in units of subframe groups, that is, when the subframe set is composed of a set number of subframes participating in multi-subframe channel estimation When including MBSFN subframes and non-MBSFN subframes, according to the first number of symbols occupied by the DCI region of the downlink control information of the MBSFN subframe and the second number of symbols occupied by the DCI region of the non-MBSFN subframe, determine the number of symbols in the subframe group The third number of symbols occupied by the DCI region of each subframe, and determine the specific starting symbol position of each subframe in the subframe group according to the third number of symbols; when performing resource mapping on the physical downlink channel , start mapping from the start symbol position determined according to the third symbol number in the first slot of the cu...

no. 2 approach

[0235] When the subframe group composed of a set number of subframes participating in multi-subframe channel estimation in the subframe set includes multicast / multicast single frequency network MBSFN subframes and non-MBSFN subframes, or, when the subframe set When multicast / multicast single frequency network MBSFN subframes and non-MBSFN subframes are included, the demodulation reference signal is a dedicated demodulation reference signal (DMRS), that is, only the control area and DMRS are reserved for each antenna where its transmission is located The RE resource corresponding to the port, and other resources can be assumed to be used for data transmission on the physical downlink channel, that is, when resource mapping is performed on the physical downlink channel, the specific start symbol in the first time slot of the current subframe The location starts to be mapped, and is mapped to all resources except the resources corresponding to the DMRS. For non-MBSFN subframes in...

no. 3 approach

[0239] When the subframe group composed of a set number of subframes participating in multi-subframe channel estimation in the subframe set or the subframe set only includes non-MBSFN subframes, each subframe group or subframe set The number of symbols in the control region in a subframe is the number of symbols in the control region configured in the non-MBSFN subframe, that is, the number of symbols in the control region configured in the non-MBSFN subframe needs to be reserved when performing channel coding and rate matching on the transport blocks carried by the physical downlink channel. Corresponding RE. In addition, the reference signal for demodulation in each subframe is CRS, or if the physical downlink channel uses a DMRS-based transmission scheme, the reference signal for demodulation in each subframe includes both CRS and DMRS, that is, the physical downlink channel carries When performing channel coding and rate matching on the transmission block of , it is necess...

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Abstract

The invention discloses a downlink data repeated transmission method and equipment, which are used to solve the problem that data cannot be merged between subframes when data is repeatedly transmitted in multiple subframes due to the different number of available REs when performing resource mapping in different subframes. The problem. The method is as follows: determine the subframe set for repeated transmission of the physical downlink channel; in each subframe in the determined subframe set, when performing resource mapping on the physical downlink channel, start from the first time slot of the current subframe Mapping starts at a specific start symbol position, and maps to all resources except the resource corresponding to the demodulation reference signal; and sends the physical downlink channel according to the resource mapping manner.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a downlink data repeated transmission method and device. Background technique [0002] 1)MTC [0003] With the rise of the Internet of Things, more and more attention is paid to supporting Machine Type Communication (MTC) in a Long Term Evolution (LTE) system. [0004] 3GPP Release 13 established a project for the physical layer enhancement of MTC. An MTC device (or MTC terminal) may have some of the characteristics of various machine-to-machine (M2M) communication, such as low mobility, small amount of transmitted data, insensitivity to communication delay, requirements Very low power consumption etc. Among them, in order to reduce the cost of the MTC UE, a new UE type will be defined, and its uplink and downlink only support 1.4 megahertz (MHz) radio frequency bandwidth. [0005] Terminals working in some scenarios in the existing network, such as terminals...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04W72/04
CPCH04L5/003H04L5/0044H04L5/0092H04L5/0048H04L5/0057H04L5/00H04W72/23H04W72/30H04B7/0626H04L1/0006H04L5/0007
Inventor 高雪娟林亚男
Owner DATANG MOBILE COMM EQUIP CO LTD
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