Candidate Beam Detection in DRX Mode Using Uniform Scaling
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Solution Overview
Problem
Traditional measurement and measurement report mechanisms in NR networks with multi-beam technology, such as RLM and RRM, fail to meet the requirements for fast beam recovery and power consumption optimization during candidate beam detection (CBD) in DRX mode.
Innovation Solution
The CBD evaluation period is determined using a uniformed scaling factor and base period, which is based on the DRX cycle length, with specific configurations for RS periodicity and measurement factors for FR1 and FR2, balancing fast recovery and power consumption by triggering CBD measurements upon beam failure detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If frequent CBD measurements are performed to achieve fast beam recovery, then beam recovery speed is improved, but power consumption of the UE increases greatly
Solution Approach 1:
The patent applies dynamics by making the CBD evaluation period configurable and adaptable based on DRX cycle length. The system dynamically adjusts the measurement frequency to match the DRX configuration, allowing fast beam recovery when needed while reducing measurements during low-activity periods to save power. The evaluation period can be scaled based on network conditions and UE capabilities.
Solution Approach 2:
The patent changes the parameter of evaluation period duration based on DRX cycle length. By scaling the evaluation period proportionally to the DRX cycle, the system optimizes the balance between measurement frequency and power consumption. This parameter adjustment allows the same CBD mechanism to work efficiently across different DRX configurations.
2Stability of the object's composition
If traditional measurement mechanisms (RLM and RRM) are used in multi-beam NR networks, then existing measurement procedures are maintained, but they fail to meet fast beam recovery requirements
Solution Approach 1:
The patent segments the measurement process into distinct phases: beam failure detection, candidate beam identification, and beam recovery execution. By introducing a specific CBD evaluation period separate from traditional RLM and RRM measurements, the system can perform targeted beam-specific measurements without disrupting existing measurement mechanisms, thereby achieving fast beam recovery while maintaining stability.
Solution Approach 2:
The patent performs preliminary candidate beam identification during the CBD evaluation period before actual beam recovery is needed. The UE proactively measures and identifies candidate beams in advance, so when beam failure occurs, recovery can proceed quickly using pre-identified candidates rather than searching from scratch.
3Loss of time
If CBD evaluation period is shortened to improve fast recovery, then response time is reduced, but measurement accuracy may be compromised
Solution Approach 1:
The patent uses periodic CBD measurements within the evaluation period to balance speed and accuracy. Instead of a single rapid measurement, the system performs multiple periodic measurements of candidate beams, allowing statistical aggregation and more reliable identification of suitable candidate beams while maintaining fast overall response time through the bounded evaluation period.
Data Source
AI summary
Apparatus and methods are provided for candidate beam detection (CBD) in DRX mode. In one novel aspect, the CBD evaluation period uses the uniformed scaling factor and the base period for the CBD evaluation period is the same when no DRX is configured and when the DRX is configured with DRX cycle length smaller than or equals to a predefined threshold. In one embodiment, the UE receives DRX configuration including a DRX cycle length, determines a base period for an evaluation period of CBD measurements based on the DRX cycle length and determines a multiplicator for the evaluation period based on a scaling factor and one or more measurement factors, and performs CBD measurements based on the evaluation period, wherein the evaluation period is based on the determined base period and the multiplicator. In one embodiment, the scaling factor is the same for all DRX configurations.