WUS-Triggered Uplink Beam Reporting During DRX On-Duration
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Solution Overview
Problem
Wireless communications systems face challenges in managing uplink beam reports due to complex and dynamic environments that can attenuate or block signals, leading to inefficiencies in signal transmission and reception, power consumption, and reduced reliability.
Innovation Solution
A method is introduced where a wakeup signal (WUS) triggers the user equipment (UE) to transmit uplink beam reports during a discontinuous reception (DRX) on-duration period, allowing immediate reporting of beam strength information to the gNodeB, thereby optimizing beam management and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits uplink beam reports continuously, then the beam management reliability is improved, but the power consumption increases
Solution Approach 1:
The patent implements periodic beam report transmission during DRX on-duration periods rather than continuous transmission. The UE wakes up at scheduled intervals to transmit beam reports and then returns to sleep mode, achieving reliable beam management information exchange while significantly reducing power consumption compared to continuous reporting.
Solution Approach 2:
The network configures the UE with DRX parameters and beam report configurations, enabling the UE to autonomously determine when to wake up and transmit reports without requiring continuous network scheduling commands. This self-service mechanism reduces signaling overhead and allows the UE to optimize its own power consumption while maintaining reliable beam management.
2Reliability
If the UE wakes up frequently to monitor downlink transmissions, then the communication reliability is improved, but the power consumption increases
Solution Approach 1:
The patent employs DRX (Discontinuous Reception) mechanism where the UE periodically wakes up during configured on-duration periods to monitor downlink transmissions and transmit beam reports, then returns to sleep mode. This periodic operation ensures the UE remains responsive to network communications while minimizing power consumption by keeping the receiver off during off-duration periods.
Solution Approach 2:
The network pre-configures DRX parameters, beam report configurations, and resource allocations before the UE enters sleep mode. This preliminary configuration allows the UE to autonomously wake up at the correct times and transmit beam reports without requiring continuous network control, thereby improving communication reliability while reducing power consumption through autonomous operation.
3Measurement precision
If the UE transmits beam reports with detailed information, then the beam management precision is improved, but the transmission overhead increases
Solution Approach 1:
The patent implements beam report transmission only during scheduled DRX on-duration periods rather than continuously, providing partial reporting coverage. The UE transmits beam strength measurements for a subset of beams during these periodic opportunities, achieving sufficient beam management precision for network decisions while avoiding the excessive overhead of continuous detailed reporting of all beams.
Data Source
AI summary
Certain aspects of the present disclosure provide a method for wireless communications at a user equipment (UE). The UE may receive a wakeup signal (WUS) from a gNodeB (gNB). The WUS may indicate that the UE has to wakeup and monitor for downlink transmissions during a subsequent discontinuous reception (DRX) on-duration period. The WUS may also indicate a time and frequency resource for transmitting a report. The UE may measure beam strength of uplink beams. The UE may transmit the report indicating the beam strength of each of the uplink beams on the time and frequency resource indicated via the WUS.