Wake-up Resource Randomization for DRX Power Efficiency
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Solution Overview
Problem
Current wireless communication systems face challenges in discontinuous reception (DRX) mode, particularly with wake-up signal resource sharing, leading to blocking and false wake-up issues among user equipment (UEs) due to shared resources, which affect power efficiency and throughput.
Innovation Solution
The implementation of UE-specific and group-specific wake-up resource randomization and sharing techniques, including UE-specific hopping patterns and scrambling sequence hopping patterns, to minimize resource collisions and false wake-ups, allowing UEs to efficiently transition between sleep and active states based on configured configuration information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple UEs share the same wake-up signal resources during DRX OFF duration, then resource utilization is improved, but resource collisions and false wake-ups increase
Solution Approach 1:
The patent applies parameter changes by introducing UE-specific and group-specific parameters (hopping patterns, scrambling sequences, cyclic shifts) to differentiate wake-up signals. These parameter variations allow multiple UEs to share resources while maintaining signal distinguishability, thus improving resource utilization without compromising wake-up accuracy
Solution Approach 2:
The patent segments the wake-up signal resources by creating UE-specific and group-specific subsets of resources. Each UE or group is assigned specific hopping patterns, scrambling sequences, and cyclic shifts, effectively dividing the shared resource pool into distinguishable segments that reduce collisions while maintaining overall resource efficiency
2Use of energy by moving object
If wake-up signals are transmitted during DRX OFF duration, then power efficiency is improved, but resource collisions among UEs increase
Solution Approach 1:
The patent changes signal parameters (hopping patterns, scrambling sequences, cyclic shifts) to allow multiple UEs to transmit and receive wake-up signals simultaneously during DRX OFF duration without harmful collisions. This enables power efficiency improvements while mitigating collision effects through parameter differentiation
Solution Approach 2:
The patent applies preliminary action by pre-configuring UE-specific and group-specific parameters (hopping patterns, scrambling sequences) before DRX operation begins. This pre-configuration ensures that when UEs wake up during OFF duration, they can immediately distinguish their intended signals from others, preventing collisions without requiring additional coordination overhead
3Reliability
If UE-specific hopping patterns are used for wake-up signals, then false wake-ups are reduced, but system complexity increases
Solution Approach 1:
The patent uses parameter changes (hopping patterns, scrambling sequences) to reduce false wake-ups while keeping the implementation complexity manageable. The complexity is distributed across standard signal processing functions that UEs already perform for other purposes, minimizing additional system complexity
Solution Approach 2:
The patent applies universality by using the same hopping patterns and scrambling sequences for multiple purposes: wake-up signal differentiation, random access preamble generation, and other LTE/NR signaling functions. This multi-functionality reduces overall system complexity while maintaining wake-up signal accuracy
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wake-up resource randomization for discontinuous reception operation. An example method generally includes obtaining configuration information for receiving at least one wake up signal (WUS) during an OFF duration of a discontinuous reception (DRX) mode of the UE; monitoring, during a WUS monitoring occasion occurring during the OFF duration of the DRX mode, the one or more resources for the at least one WUS based on the configuration information; and transitioning to an ON state of the DRX mode when the at least one WUS is detected in the one or more resources during the monitoring; or remaining in an OFF state of the DRX mode when the at least one WUS is not detected in the one or more resources during the monitoring.