UE Wake-Up Receiver Coverage Feedback for Latency-Critical Paging
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Solution Overview
Problem
User equipment (UE) with low-power wake-up receivers in radio networks face challenges in indicating their coverage status, leading to inefficiencies in power consumption and communication latency, as existing solutions like eDRX are not applicable for latency-critical services.
Innovation Solution
The UE measures parameters associated with network radio coverage and transmits information to the network about its wake-up receiver's reception status, allowing it to select and monitor appropriate paging signals, and the network configures conditions for wake-up signals to optimize coverage and transmission mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE uses extended periodicity to monitor paging signals (eDRX), then power consumption is reduced, but communication latency becomes unacceptable for latency-critical services
Solution Approach 1:
The patent implements wake-up signal monitoring at extended periodicity intervals, allowing the UE to remain in low-power state longer while still detecting paging events. The network schedules wake-up signals periodically, and the UE wakes up at these predetermined intervals to check for paging messages, achieving both power savings and acceptable latency for critical services.
Solution Approach 2:
The patent enables dynamic adaptation of monitoring behavior based on service requirements. The UE can switch between different monitoring modes (extended periodicity for non-critical services, more frequent monitoring for latency-critical services) based on network configuration and current service demands, optimizing the balance between power consumption and latency.
2Loss of time
If the UE continuously monitors for paging signals, then communication latency is reduced, but power consumption increases
Solution Approach 1:
Instead of continuous monitoring, the UE monitors paging signals at extended periodicity intervals. The network schedules wake-up signals at specific periodic intervals, and the UE wakes up only at these predetermined times to check for paging messages, significantly reducing power consumption while maintaining acceptable latency performance.
Solution Approach 2:
The UE autonomously manages its power consumption by implementing discontinuous reception based on configured periodicity. The device can independently determine when to wake up and monitor for paging signals based on network-provided configuration parameters, eliminating the need for continuous network control and reducing overall power usage.
3Reliability
If the network schedules wake-up signals for all UEs, then coverage is ensured, but network resources are wasted when not needed
Solution Approach 1:
The UE provides feedback to the network regarding its wake-up signal reception status and coverage conditions. Based on this feedback, the network can dynamically adjust its wake-up signal scheduling, transmitting signals only to UEs that need them and at appropriate times, thereby ensuring coverage reliability while minimizing unnecessary network resource consumption.
Solution Approach 2:
The network dynamically adjusts wake-up signal transmission parameters (such as timing, frequency, and power) based on UE feedback and network conditions. This allows the network to optimize resource allocation by transmitting wake-up signals only when and where needed, rather than using a fixed schedule for all UEs, thus balancing coverage reliability with resource efficiency.
Data Source
AI summary
In some examples, user equipment comprises a processor, a memory coupled to the processor, the memory configured to store program code executable by the processor, the program code comprising one or more instructions, whereby to cause the user equipment to measure a parameter associated with a radio coverage of a network node for the user equipment, on the basis of the value of the parameter, transmit information to the network node representing a reception status of a wake-up receiver of the user equipment, and on the basis of the reception status of the wake-up receiver of the user equipment monitor a selected paging signal from one of multiple paging signals transmitted by the network node.