Subframe Indication Overhead Reduction in 5G Self-Contained Frames
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Solution Overview
Problem
In 5G mobile communications, the overhead of signaling required to indicate subframe types in self-contained subframes is excessively large due to the numerous possible configurations of downlink and uplink control signaling, data, and gaps within these subframes, leading to inefficient data transmission.
Innovation Solution
A method and device that reduce subframe indication overhead by only transmitting information about specific parts of the subframe, such as the quantity or time domain location of uplink or downlink control signaling and data, allowing the receiving device to determine the subframe type based on this reduced information, and using downlink control signaling to schedule data across subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complete subframe type indication information is transmitted to indicate all possible configurations of downlink and uplink control signaling and data, then the receiving device can accurately determine the subframe type, but the signaling overhead becomes excessively large
Solution Approach 1:
The patent segments the subframe indication information into multiple parts: a first indication information (transmitted) and a second indication information (not transmitted). The receiving device combines the transmitted first indication information with preconfigured second indication information to determine the complete subframe type. This segmentation allows only essential information to be transmitted while maintaining accurate subframe type determination.
Solution Approach 2:
The patent changes the parameter representation by using a reduced set of indication bits (first indication information) that, when combined with preconfigured parameters (second indication information), reconstruct the complete subframe type parameters. This parameter transformation reduces the transmission overhead while preserving the ability to accurately determine subframe configurations.
2Ease of operation
If detailed information about quantity and time domain location of all subframe components is transmitted, then the receiving device can precisely configure data transmission, but the communication efficiency decreases due to large overhead
Solution Approach 1:
The patent extracts only the essential variable parts of subframe configuration information (first indication information) for transmission, while the remaining parts (second indication information) are preconfigured at the receiving device. This extraction approach maintains precise data transmission configuration capability while eliminating redundant information transmission, thereby improving communication efficiency.
Data Source
AI summary
Embodiments of the present invention provide a subframe indication method and a device. A first device determines subframe indication information that indicates at least one of uplink control signaling, downlink control signaling, and data of a first subframe, and sends the subframe indication information to a second device, so that the second device determines a type of the first subframe based on the subframe indication information. In this process, the first device needs to send, to the second device, only the subframe indication information that indicates at least one of parts of the first subframe, and the second device may determine the type of the first subframe based on the subframe indication information, so as to reduce overheads of the subframe indication information.