Transmission method and device for downlink control information (DCI)

A technology of control information and transmission method, applied in the field of communication, can solve the problems of limited control channel capacity and high complexity of blind detection

Active Publication Date: 2018-11-23
CHINA MOBILE COMM LTD RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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, whic...

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  • Transmission method and device for downlink control information (DCI)
  • Transmission method and device for downlink control information (DCI)
  • Transmission method and device for 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 more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

[0126] like figure 1 As shown, an 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, where the first-level DCI includes: format information of the second-level DCI and downlink resource allocation information in the to-be-transmitted DCI used to indicate the time-frequency resource location of the to-be-transmitted data ;

[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 i...

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Abstract

The invention provides a transmission method and device for downlink control information (DCI). The method comprises the steps of obtaining to-be-transmitted DCI in a downlink control channel; sendingfirst-level DCI to user equipment, wherein the first-level DCI comprises format information of second-level DCI and downlink resource allocation information; and sending the second-level DCI to the user equipment. According to the embodiment of the invention, the to-be-transmitted DCI in the downlink control channel is divided into two levels for transmission and the bit number of the first-levelDCI is fixed, so blind test times of the first-level DCI is relatively low, and transmission reliability is improved under the same control channel resource; the first-level DCI comprises the formatinformation of the second-level DCI, so a type of the second-level DCI can be determined, and the transmission reliability is improved; and the second-level DCI is transmitted in a physical downlinkshared data channel scheduled by a user, so downlink transmission resources can be dynamically multiplexed, and the problem that capacity of the control channel is limited is effectively solved.

Description

technical field [0001] The present invention relates to the field of communication technologies, and 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 grant 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 uses, a variety of downlink control information formats (DCI (downlink control information) formats) are designed in the LTE system. Specifically, for the downlink scheduling allocation information, LTE defines DCI formats 1, 1A, 1B, 1C, 1D, 2, and 2A to indicate different transmission modes of downlink shared channels, respectively. The user equipment UE obtains the downlink control information tran...

Claims

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Application Information

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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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