Low-Power Wake-Up Signal Gating by UE Coverage State
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Solution Overview
Problem
In wireless communications systems, network entities transmit low power wake-up signals (LP-WUS) to user equipment (UE) that may not be within the coverage area of the UE's low power wake-up radio (LP-WUR, leading to increased power usage and resource waste.
Innovation Solution
The network entity determines the UE's coverage state and movement information to decide whether to transmit LP-WUS, ensuring the UE is within the LP-WUR coverage area before sending the signal, thereby optimizing power usage and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network entity transmits LP-WUS to all UEs, then the wake-up signal coverage is improved, but the network power consumption increases
Solution Approach 1:
The network entity performs preliminary assessment by obtaining coverage state information and movement information about the UE before transmitting the LP-WUS. This preliminary action allows the network to determine whether the UE is within the LP-WUR coverage area and satisfies movement thresholds, thereby avoiding unnecessary transmissions and reducing network power consumption while maintaining reliable wake-up signal coverage for eligible UEs.
2Use of energy by moving object
If the network entity checks coverage state and movement information before transmission, then the power consumption is reduced, but the system complexity increases
Solution Approach 1:
The network entity implements a feedback mechanism by obtaining coverage state information and movement information from the UE or other network entities. This feedback provides the necessary data to make informed transmission decisions, enabling the network to reduce power consumption through targeted transmissions while managing system complexity through structured information exchange and decision-making processes.
3Productivity
If the network entity transmits LP-WUS only when UE is within coverage area, then the resource allocation efficiency is improved, but the wake-up signal reliability may deteriorate
Solution Approach 1:
The network entity dynamically adjusts transmission parameters based on the UE's coverage state and movement information. By changing transmission conditions according to these parameters, the network ensures that LP-WUS is transmitted only when the UE is within the LP-WUR coverage area and satisfies movement thresholds, thereby improving resource allocation efficiency while maintaining wake-up signal reliability for eligible UEs through condition-based transmission decisions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques may enable a network entity to determine if a user equipment (UE) is within a coverage area associated with a low-power wake-up radio (LP-WUR) of the UE prior to transmitting a low power wake-up signal (LP-WUS). For example, the network entity may obtain coverage state information including the coverage area of the LP-WUR and a location of the UE. The network entity may further determine whether the UE is likely to remain within the coverage area based on assistance information from the UE (e.g., transmitted to the network entity or another network entity). The network entity may accordingly refrain from transmitting a LP-WUS if the UE is outside of the coverage area or if the UE is likely to move outside of the coverage area.