A method and device for transmitting downlink control information DCI

A technology for controlling information and transmission methods, applied in the field of communication, can solve the problems of limited control channel capacity and high complexity of blind detection, and achieve the effect of improving reliability and solving capacity constraints

Active Publication Date: 2022-04-08
CHINA MOBILE COMM LTD RES INST +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to provide a DCI transmission method and device for downlink control information, which solves the problems of high blind detection complexity and limited control channel capacity in the DCI transmission mode of the prior art

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  • A method and device for transmitting downlink control information DCI
  • A method and device for transmitting downlink control information DCI
  • A method and device for transmitting downlink control information DCI

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Embodiment Construction

[0125] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0126] Such as figure 1 As shown, the embodiment of the present invention provides a method for transmitting downlink control information DCI, including:

[0127] Step 11, acquiring the DCI to be transmitted in the downlink control channel;

[0128] Step 12: Send the first-level DCI to the user equipment, the first-level DCI includes: the format information of the second-level DCI and the downlink resource allocation information used to indicate the time-frequency resource position of the data to be transmitted in the DCI to be transmitted ;

[0129] Step 13: Send the second-level DCI to the user equipment, where the second-level DCI includes: other control information in the to-be-transmitted DCI except the downlink resource allocation information.

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Abstract

The present invention provides a method and device for transmitting downlink control information DCI, the method comprising: acquiring DCI to be transmitted in a downlink control channel; sending first-level DCI to user equipment, and the first-level DCI includes: second-level DCI format information and downlink resource allocation information; and send the second-level DCI to the user equipment. In the embodiment of the present invention, the downlink control information to be transmitted in the downlink control channel is divided into two levels for transmission, and the number of bits of the first-level DCI is fixed, so the number of blind detections of the first-level DCI is less. The transmission reliability is improved under resources; and the format information of the second-level DCI is included in the first-level DCI, so that the type of the second-level DCI can be determined and the reliability of the transmission is improved; and the second-level DCI is located in the downlink shared by the user scheduling Transmission in the data channel can dynamically multiplex downlink transmission resources, effectively solving the problem of limited control channel capacity.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for transmitting downlink control information DCI. Background technique [0002] The downlink control channel in LTE (Long Term Evolution) is mainly used to transmit downlink scheduling allocation information, uplink transmission authorization information, and some common control information such as paging, random access response, resource allocation information of system messages, and power control information of user groups, etc. . Based on these purposes, various downlink control information formats (DCI (downlink control information) formats) are designed in the LTE system. Specifically, for downlink scheduling allocation information, LTE defines DCI formats 1, 1A, 1B, 1C, 1D, 2, 2A, etc. to indicate different transmission modes of downlink shared channels. The user equipment UE obtains the downlink control information transmitted by the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/12H04L5/00
CPCH04L5/0053H04W72/0446H04W72/0453H04W72/23
Inventor 孙奇倪吉庆周伟
Owner CHINA MOBILE COMM LTD RES INST
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