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Data retransmission method and apparatus

A data retransmission and data technology, applied in the field of data retransmission, can solve the problems of complexity, power consumption increase, physical resource consumption, etc., and achieve the effect of reducing power loss and improving experience rate

Active Publication Date: 2018-05-29
CHINA MOBILE COMM LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above technical problems, the embodiments of the present invention provide a method and device for data retransmission, which solves the problem of the consumption of physical resources caused by a large number of retransmissions at the sending end, and the complexity and power required to perform multiple decoding operations at the receiving end. The problem of increased consumption

Method used

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  • Data retransmission method and apparatus
  • Data retransmission method and apparatus
  • Data retransmission method and apparatus

Examples

Experimental program
Comparison scheme
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no. 1 example

[0083] see figure 2 , the figure shows a data retransmission method, the specific steps are as follows:

[0084] Step 201, after the data transmission in the data scheduling transmission unit is completed, send an indication message; wherein, the indication message is used to indicate that the scheduling resources in the base station or user data scheduling transmission unit are occupied; and / or the indication The message is used to indicate whether the data corresponding to the occupied scheduling resource in the base station or the user data scheduling transmission unit will be retransmitted.

[0085] In this embodiment, optionally, the data scheduling transmission unit is the time and frequency unit of a data scheduling transmission, which may be one or more TTIs, subframes, slots, mini slots -slot) etc.

[0086] After the data transmission in the data scheduling transmission unit is completed, it may be after a data scheduling transmission of all users is completed, or ...

no. 2 example

[0128] see Figure 6 , the figure shows a data retransmission device, the device 600 includes:

[0129] The sending module 601 is configured to send an indication message after the data transmission in the data scheduling transmission unit ends;

[0130] Wherein, the indication message is used to indicate that the scheduling resources in the base station or the user data scheduling transmission unit are occupied; and / or

[0131] The indication message is used to indicate whether the data of the base station or the user whose scheduling resources are occupied in the user scheduling data transmission unit will be retransmitted.

[0132] In this embodiment, optionally, the data scheduling transmission unit is a time unit of a data scheduling transmission, which may be one or more TTIs, subframes, time slots, mini-slots, etc., and the data transmission unit includes but not limited to the following structures:

[0133] contains at least one downlink transmission part and at lea...

no. 3 example

[0148] see Figure 7 , the figure shows a data retransmission method, the specific steps are as follows:

[0149] Step 701, receiving instruction information sent by the base station;

[0150] The indication message is used to indicate that the scheduling resources in the data scheduling transmission unit are occupied; and / or

[0151] The indication message is used to indicate whether the data of the user whose scheduling resource is occupied in the data scheduling transmission unit will be retransmitted.

[0152] In this embodiment, optionally, if the indication message indicates that the data of the user whose scheduling resource is occupied in the data scheduling transmission unit will be retransmitted, the Hybrid Automatic Repeat Request (HARQ) operation is not started; or

[0153] If the indication message indicates that the data of the user whose scheduling resource is occupied in the data scheduling transmission unit will not be retransmitted, the operation is perform...

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Abstract

The embodiment of the invention provides a data retransmission method and apparatus. The method comprises the following steps: after the end of data transmission in a data scheduling transmission unit, sending an indication message, wherein the indication message is used for indicating the occupation condition of scheduling resources in a base station or a user data scheduling transmission unit; and / or, the indication message is used for indicating whether user data occupied by the scheduling resources in the base station or the user data scheduling transmission unit are retransmitted. The following problems are solved: physical resources are consumed by a large amount of retransmission of a sending end, and a receiving end needs to perform decoding operations for multiple times to increase the complexity and the power consumption.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data retransmission method and device. Background technique [0002] In the current frame structure of LTE (Long Term Evolution, Long Term Evolution), the downlink scheduling allocation and uplink scheduling authorization are performed through the downlink control channel (carrying downlink control information, DCI: Downlink control information) located in the downlink control area, of which the control area is the most Occupies 3 OFDM (Orthogonal Frequency Division Multiplexing) symbols (4 for 1.4MHz system bandwidth). [0003] The control information contained in the downlink scheduling allocation DCI includes PDSCH (Physical Downlink Shared Channel) resource indication, transmission format, HARQ (Hybrid Automatic Repeat Request) information, and control information related to spatial multiplexing (if spatial multiplexing is adopted The downlink scheduling all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/00H04L5/00
CPCH04L1/0027H04L1/1896H04L5/0053H04L1/00H04L1/18H04L5/00
Inventor 胡丽洁侯雪颖徐晓冬
Owner CHINA MOBILE COMM LTD RES INST
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