Conditional Cell Handover for MPE Compliance and Communication Quality
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing uplink transmit power to comply with electromagnetic field exposure limits, particularly in high-frequency ranges, which can compromise communication quality and efficiency.
Innovation Solution
Implementing conditional handover and conditional PSCell change mechanisms that allow user equipment to proactively switch to a target cell when uplink transmit power exceeds maximum permitted exposure limits, even if traditional handover conditions are not met, using body proximity sensing and beamforming techniques to optimize power reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If uplink transmit power is reduced to comply with MPE limits, then electromagnetic field exposure compliance is improved, but communication quality and efficiency deteriorate
Solution Approach 1:
The system performs preliminary assessment of MPE compliance status and proactively triggers handover to candidate cells before communication quality deteriorates. The source cell evaluates whether the UE can be served by candidate cells without exceeding MPE limits, and prepares handover commands in advance to prevent power reduction that would harm communication quality.
Solution Approach 2:
The network introduces an intermediary handover mechanism between the UE and target cell. Instead of directly reducing power at the UE, the network acts as an intermediary by orchestrating handover to candidate cells that can provide service within MPE limits, thereby resolving the conflict between power compliance and communication quality through a mediating relocation process.
2Object-affected harmful factors
If conditional handover is implemented for MPE compliance, then electromagnetic field exposure compliance is improved, but device complexity increases
Solution Approach 1:
The conditional handover mechanism serves multiple functions: it manages MPE compliance, maintains communication quality, and provides seamless mobility. By designing a unified handover framework that handles both MPE-related power issues and traditional mobility requirements, the system avoids duplicating separate mechanisms, thereby reducing overall device complexity while achieving compliance.
Solution Approach 2:
The UE autonomously monitors its own MPE compliance status and uplink power levels, and self-initiates handover execution when compliance violations are detected. This self-service approach reduces the need for complex network-controlled monitoring and decision-making mechanisms, thereby simplifying the overall system while ensuring MPE compliance.
Data Source
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AI summary
The present application relates to devices and components including apparatus, systems, and methods for early conditional handovers based on body proximity sensing or maximum permissible exposure limits in wireless networks.