NR Beam Reception Timing for Low-Power UE Control Signaling
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Solution Overview
Problem
The multi-beamforming in the NR system leads to increased power consumption and reduced efficiency due to unnecessary reception and transmission of downlink and uplink control channels during beam sweeping, narrower beam coverage causing communication disconnections, and inefficient Ack/Nack feedback schemes.
Innovation Solution
A communication system where a base station device notifies a communication terminal device of optimal reception timing, allowing the terminal to synchronize its operations and reduce power consumption while maintaining communication quality and resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communication terminal performs reception in each subframe during beam sweeping, then the terminal can receive downlink control channels, but power consumption increases and communication efficiency decreases
Solution Approach 1:
The base station transmits timing information about when the terminal should perform reception in advance. This allows the terminal to prepare and synchronize its reception operations only at the optimal moments during beam sweeping, avoiding continuous power consumption while ensuring reliable reception at the correct timing.
2Manufacturing precision
If the beam coverage is made narrower to improve beamforming precision, then beamforming performance improves, but communication disconnections increase due to limited coverage
Solution Approach 1:
The system dynamically switches between multiple beams during beam sweeping to cover the entire service area. Each beam maintains narrow precision for its specific direction, while the collection of beams provides comprehensive coverage. The base station coordinates beam switching to ensure continuous communication as the terminal moves through different coverage areas.
3Productivity
If the terminal transmits uplink control channels at all beam timings, then communication opportunities increase, but power consumption and unnecessary transmissions increase
Solution Approach 1:
The base station provides feedback information about the current beam timing and reception status to the terminal. Based on this feedback, the terminal intelligently decides whether to transmit uplink control channels at each timing opportunity, avoiding unnecessary transmissions while maintaining communication efficiency during appropriate beam phases.
Data Source
AI summary
Provided is a communication system capable of suppressing increase in the power consumption of a communication terminal device, degradation in the communication quality, and reduction in the use efficiency of radio resources. A base station device (gNB) notifies a communication terminal device (UE) of information on the next reception timing. The UE receives, for example, a downlink control signal in a subframe. The UE obtains, from the downlink control signal, information on a piece of user data in the subframe, and the information on the next reception timing. The UE transmits and receives the piece of user data to and from the gNB. The information on the next reception timing indicates a subframe as the next reception timing of the UE. The UE receives a downlink control signal in the subframe.