UE Early Measurement Reporting with Wake-Up Triggering
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Solution Overview
Problem
Existing wireless communication systems incur unnecessary power consumption due to user equipment (UE) performing early measurement reporting (EMR) measurements when not required, particularly when transitioning from RRC_CONNECTED to RRC_INACTIVE or RRC_IDLE states, leading to inefficient battery usage.
Innovation Solution
Implementing an enhanced early measurement reporting (eEMR) procedure where UE saves EMR configuration upon expiration of the T331 timer and initiates measurements only upon receiving a wake-up signal or detecting uplink data availability, allowing for more controlled and efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs early measurement reporting measurements continuously when transitioning from RRC_CONNECTED to RRC_INACTIVE or RRC_IDLE states, then measurement availability is improved, but power consumption increases
Solution Approach 1:
The network configures the UE with early measurement reporting configuration before the UE transitions to RRC_INACTIVE or RRC_IDLE states. The UE performs measurements in advance using this pre-configured setup, so that when the network needs measurement results, they are already available. This eliminates the need for continuous measurement monitoring in idle states, thereby reducing power consumption while ensuring measurement availability.
Solution Approach 2:
The UE performs early measurement reporting measurements during specific periodic intervals or triggered events (such as cell reselection or wake-up from idle state) rather than continuously. The measurement configuration includes parameters that define when measurements should be performed, allowing the UE to enter low-power states between measurement occasions, thus balancing measurement availability with power conservation.
2Measurement precision
If UE performs early measurement reporting measurements continuously, then measurement precision is improved, but battery life decreases
Solution Approach 1:
The network provides pre-configuration for measurements during the connected state, allowing the UE to perform measurements in advance with proper configuration. This ensures that when measurements are needed, they are already available with sufficient precision, eliminating the need for extended continuous measurement operations that would drain the battery.
Solution Approach 2:
The UE performs measurements at selective moments (such as during cell reselection or when triggered by network indications) rather than maintaining constant measurement activity. The early measurement configuration includes parameters that define adequate sampling intervals and measurement objects, ensuring sufficient measurement precision for handover decisions while avoiding excessive measurement operations that would unnecessarily consume battery life.
3Speed
If UE initiates measurements immediately upon configuration, then response time is improved, but power efficiency deteriorates
Solution Approach 1:
The network configures the UE with complete measurement parameters (measurement objects, reporting configurations, criteria) while the UE is still in RRC_CONNECTED state. This preliminary configuration allows the UE to immediately initiate measurements when transitioning to idle states without needing to process configuration requests later, thus maintaining fast response time while reducing the frequency of active measurement states and improving overall energy efficiency.
Data Source
AI summary
A method, apparatus, and a computer-readable storage medium are provided for enhanced early measurement reporting procedures at a user equipment. In an example implementation, the method may include a user equipment determining that the user equipment is configured for enhanced early measurement reporting, determining whether to initiate early measurement reporting measurements based on an indication when the user equipment is configured for enhanced early measurement reporting, and initiating the early measurement reporting measurements in response to determining to initiate the early measurement reporting measurements. In an additional example implementation, the method may include a network node transmitting enhanced early measurement reporting configuration to a user equipment and receiving early measurement reporting measurements from the user equipment. The early measurement reporting measurements performed at the user equipment based at least on the enhanced early measurement reporting configuration.