Wakeup Signal Resource Reservation for Low-Power UE
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Solution Overview
Problem
Low-power user equipment (UE) in wireless communication systems face challenges with reliable wakeup signals due to higher RF sensitivity, leading to interference from adjacent resources, which affects power efficiency and communication reliability.
Innovation Solution
Reserving specific time-domain and frequency-domain resources around the wakeup signal (WUS) for low-power UE, where other UEs refrain from transmitting, thereby blanking these resources to prevent power leakage and enhance signal reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low-power UE uses higher RF sensitivity to detect wakeup signals, then power efficiency is improved, but interference from adjacent resources increases affecting reliability
Solution Approach 1:
The patent extracts and removes interfering transmissions from the frequency resources adjacent to the wakeup signal. By reserving these adjacent resources and preventing other UEs from transmitting in them, the harmful interference is taken out of the system, allowing low-power UE to detect wakeup signals reliably without being affected by power leakage from neighboring resources.
Solution Approach 2:
The patent applies local quality by creating a protected zone specifically around the wakeup signal frequency resources. Instead of uniformly restricting all transmissions, only the adjacent resources to the wakeup signal are reserved and protected from interference. This localized approach maintains power efficiency benefits while ensuring reliability specifically where needed for wakeup signal detection.
2Reliability
If resources are reserved around wakeup signal to prevent interference, then reliability is improved, but available transmission resources for other UEs decrease
Solution Approach 1:
The patent applies partial action by reserving only the specific frequency resources immediately adjacent to the wakeup signal, rather than restricting all system resources. This targeted reservation provides just enough protection to ensure wakeup signal reliability while minimizing the impact on overall resource utilization. The reserved resources are limited to what is necessary for interference protection.
3Reliability
If low-power UE monitors for wakeup signals frequently, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements preliminary action by reserving and protecting the wakeup signal resources in advance before any transmission occurs. This pre-configuration of protected resources ensures that when low-power UE monitors for wakeup signals, the detection can be performed reliably without requiring frequent or prolonged monitoring, thereby reducing overall power consumption while maintaining communication reliability.
Data Source
AI summary
To facilitate operations of a low-power UE with high RF sensitivity, methods, apparatuses, and computer-readable medium are provided. An example method includes receiving, from a base station or a second UE, a reservation reserving a set of time-domain resources and a set of frequency domain resources around a WUS for a low-power UE. The example method further includes refraining from transmitting in the reserved resources.