Method and device for indicating and determining downlink control information format

A technology of control information and specific information, which is applied in the field of determining the format of downlink control information and indicating, can solve the problem that terminals cannot be distinguished, and achieve the effect of reducing the number of blind inspections

Active Publication Date: 2018-04-03
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the disadvantage of the existing technology is that in some cases, the terminal cannot distinguish the DCI format according to the display bit indication in the DCI

Method used

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  • Method and device for indicating and determining downlink control information format
  • Method and device for indicating and determining downlink control information format
  • Method and device for indicating and determining downlink control information format

Examples

Experimental program
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Embodiment 1

[0118] Assuming that the UE transmits data on the first sTTI in the subframe, the DCI that schedules the terminal to transmit on the sTTI is called sDCI in this embodiment. The sDCI is transmitted in the legacy control region. At the same time, it is assumed that the DCI of the legacy subframe that the UE is scheduled to transmit on the normal subframe (normal subframe) is DCI format1A. In order to reduce the number of times of blind detection and processing complexity at the terminal side, the size of the sDCI is the same as that of the DCI format0 / 1A. Assume that the bit length of sDCI and DCI format0 / 1A is M bits, and the terminal blindly detects DCI according to M bits in its own search space. Since sDCI and DCI format0 / 1A have the same size, the terminal can receive sDCI through a set of blind detection and DCIformat1A.

[0119] After receiving sDCI or DCI format1A, the terminal determines that the current DCI is sDCI or DCI format1A according to bit information in the ...

Embodiment 2

[0123] Assuming that the UE transmits data on the first sTTI in the subframe, the DCI that schedules the terminal to transmit on the sTTI is called sDCI in this embodiment. The sDCI is transmitted in the legacy control region. At the same time, it is assumed that the DCI of the legacy subframe that the UE is scheduled to transmit on the normal subframe is DCI format1A. In order to reduce the number of times of blind detection and processing complexity at the terminal side, the size of the sDCI is the same as that of the DCI format0 / 1A. Assume that the bit length of sDCI and DCIformat1A is M bits, and the terminal blindly detects DCI according to M bits in its own search space. Since sDCI and DCIformat1A have the same size, the terminal can receive sDCI and DCI format1A through a set of blind detection.

[0124] After receiving sDCI or DCI format1A, the terminal determines that the current DCI is sDCI or DCI format1A according to the bit information in the second information f...

Embodiment 3

[0128] Assuming that the UE transmits data on the first sTTI in the subframe, the DCI that schedules the terminal to transmit on the sTTI is called sDCI in this embodiment. The sDCI is transmitted in the legacy control region. At the same time, it is assumed that the DCI of the legacy subframe that the UE is scheduled to transmit on the normal subframe is DCI format0. In order to reduce the number of times of blind detection and processing complexity at the terminal side, the size of the sDCI is the same as that of the DCI format0 / 1A. Assume that the bit length of sDCI and DCI format0 / 1A is M bits, and the terminal blindly detects DCI according to M bits in its own search space. Since sDCI and DCI format0 / 1A have the same size, the terminal can receive sDCI and DCI through a set of blind detection. DCI format0.

[0129]After receiving sDCI or DCI format0, the terminal determines that the current DCI is sDCI or DCI format0 / 1A according to bit information in the second informa...

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Abstract

The invention discloses a method and a device for indicating and determining a downlink control information format. The method comprises the following steps of when the bit length of the downlink control information within a short transmission time interval is the same as the bit length of the downlink control information within a traditional subframe, carrying an indication in the information field, and indicating that the downlink control information is the downlink control information of the traditional subframe or the downlink control information of the short transmission time interval; after receiving the downlink control information, determining whether the downlink control information is the downlink control information of the traditional subframe or the downlink control informationof the short transmission time interval according to the indication. By adopting the technical scheme of the invention, the downlink control information of the traditional subframe and the downlink control information of the short transmission time interval, which are the same in size, can be distinguished from each other by the terminal. Therefore, the times of blind detection for the terminal during the transmission of the short downlink control information in a traditional control area can be reduced.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for indicating and determining the format of downlink control information. Background technique [0002] The mobile Internet is subverting the traditional mobile communication business model, providing users with unprecedented experience, and profoundly affecting all aspects of people's work and life. The mobile Internet will promote the further upgrading of information interaction methods in human society, and provide users with richer business experiences such as augmented reality, virtual reality, ultra-high-definition (3D) video, and mobile cloud. The further development of the mobile Internet will bring about a thousand-fold increase in mobile traffic in the future, and promote a new round of changes in mobile communication technology and industry. The Internet of Things expands the service scope of mobile communication, extending ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04L5/00
CPCH04L5/0053H04W72/23H04L5/00H04W72/04
Inventor 王磊潘学明
Owner DATANG MOBILE COMM EQUIP CO LTD
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