Uplink Resource Reporting Under MPE Power Limits in 5G Terminals
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Solution Overview
Problem
In 5G networks operating at high frequencies, user equipment (UE) must reduce uplink transmission power to comply with maximum permissible exposure (MPE) limits, which can lead to radio link failures and inefficient resource utilization.
Innovation Solution
The UE identifies uplink resources impacted by MPE events and communicates this information to the network, using threshold-based mechanisms to differentiate between reactive and proactive reporting, enabling the network to adjust scheduling and resource allocation accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If uplink transmission power is reduced to comply with MPE limits, then harmful electromagnetic exposure is reduced, but radio link reliability deteriorates and transmission quality decreases
Solution Approach 1:
The patent segments uplink resources into different types (first type and second type) with different power reduction characteristics. The UE selectively applies power reduction only to first type resources when MPE events occur, while maintaining full power on second type resources, thereby preserving radio link reliability while complying with MPE limits.
Solution Approach 2:
The patent implements dynamic resource configuration where the network can adaptively assign different resource types based on UE capability and deployment scenario. The UE dynamically reports its capability to the network, enabling real-time optimization of uplink resource allocation to balance MPE compliance and transmission reliability.
2Object-affected harmful factors
If uplink transmission power is reduced to comply with MPE limits, then harmful electromagnetic exposure is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent divides uplink resources into first type resources (subject to power reduction) and second type resources (exempt from power reduction). This segmentation enables the UE to maintain high resource utilization efficiency by transmitting on second type resources without power reduction, while still complying with MPE limits on first type resources.
Solution Approach 2:
The patent changes the power parameter selectively based on resource type and MPE event status. When MPE events occur, the UE reduces power only for first type resources while maintaining full power for second type resources, thereby optimizing overall resource utilization efficiency while complying with regulatory limits.
3Measurement precision
If the UE reports all uplink resources affected by MPE events, then network scheduling accuracy improves, but signaling overhead increases
Solution Approach 1:
The patent segments the resource reporting mechanism by introducing type indicators. The UE reports affected resources along with their type classifications, enabling the network to precisely identify which resources require power reduction without requiring separate reporting mechanisms for each resource characteristic, thus balancing accuracy and overhead.
Solution Approach 2:
The patent creates a multi-functional reporting mechanism where a single uplink resource indication message simultaneously conveys resource identity, resource type, and MPE event status. This universal message structure reduces signaling overhead compared to separate dedicated messages for each piece of information.
Data Source
AI summary
There is provided an apparatus for a terminal, apparatus for a terminal, the apparatus being caused to determine that at least one uplink resource is associated with a reduced uplink transmission power; and transmit an identification of the at least one uplink resource to a network apparatus.