C-DRX Wake-up Beam Management for 5G Mobility
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G and LTE, face challenges in maintaining effective beam management for wake-up signals during connected-mode discontinuous reception (C-DRX) cycles, leading to potential beam degradation and increased power consumption due to rapid beam misalignment and UE mobility.
Innovation Solution
The method involves monitoring and measuring beam-swept wake-up signals by user equipment (UE) before an ON period of a C-DRX cycle, reporting these measurements to the network entity, and adjusting the set of beams used for subsequent wake-up signal transmissions based on the received reports, thereby mitigating beam degradation and optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam management is performed continuously to maintain accurate beam alignment, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by performing beam measurements and reporting during the C-DRX OFF period before the ON period. The UE measures wake-up signals and reports beam information in advance, allowing the network to prepare beam configuration before the UE needs to be fully active, thus maintaining reliability while reducing power consumption during the sleep period
Solution Approach 2:
The patent implements feedback through beam measurement reports transmitted from the UE to the network entity during C-DRX operation. The UE measures beam-swept wake-up signals and sends measurement reports back to the network, enabling continuous beam management and adaptation without requiring the UE to be fully active, thereby resolving the contradiction between reliability and power consumption
2Measurement precision
If beam sweeping is performed frequently to track UE mobility, then beam alignment accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies periodic action by configuring beam sweeping and measurement operations to occur at specific intervals during C-DRX cycles rather than continuously. The network entity performs beam sweeping during designated periods and uses measurement reports from UEs to update beam configurations periodically, maintaining alignment accuracy while reducing the frequency of complex operations
Solution Approach 2:
The patent implements self-service by enabling UEs to autonomously perform beam measurements and generate measurement reports during their sleep periods. The UE independently monitors wake-up signals and reports beam information without requiring continuous network intervention, simplifying system complexity while maintaining measurement precision
3Ease of operation
If wake-up signals are transmitted using fixed beams, then transmission simplicity is improved, but missed wake-up signals increase due to beam misalignment
Solution Approach 1:
The patent applies dynamics by transitioning from fixed beam transmission to dynamic beam sweeping. The network entity dynamically switches between multiple beams during wake-up signal transmission to account for UE mobility and beam misalignment. This dynamic approach maintains transmission simplicity from the UE's perspective while significantly improving wake-up signal delivery reliability through multi-beam coverage
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wake-up signal beam management.