Virtual Cell Camping Reduces UE Power Consumption
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) experiences power consumption and connection latency issues due to the need for frequent signal measurements during cell selection or reselection when transitioning from an idle or inactive mode to a connected mode, especially when moving between physical cells within a virtual cell's coverage area.
Innovation Solution
The implementation of a method and system that allows UE to camp on a virtual cell, which includes multiple physical cells, enabling transition to a connected mode through reselection, redirection, and handover procedures via radio resource control (RRC) connection establishment/resume signaling, reducing the need for pre-connection measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs frequent signal measurements during cell selection or reselection when transitioning from idle or inactive mode to connected mode, then connection reliability is improved, but power consumption increases and connection latency increases
Solution Approach 1:
The UE performs signal measurements in advance while in idle or inactive mode, before transitioning to connected mode. This preliminary measurement action allows the UE to have measurement results ready, eliminating the need for repeated measurements after mode transition, thereby reducing power consumption and connection latency while maintaining connection reliability
2Reliability
If UE performs frequent signal measurements during cell selection or reselection when transitioning from idle or inactive mode to connected mode, then connection reliability is improved, but connection latency increases
Solution Approach 1:
The UE performs signal measurements in advance while in idle or inactive mode, before transitioning to connected mode. This preliminary measurement action allows the UE to have measurement results ready, eliminating the need for repeated measurements after mode transition, thereby reducing connection latency while maintaining connection reliability
3Measurement precision
If UE camps on physical cells and performs cell reselection when moving between physical cells within virtual cell coverage area, then connection accuracy is improved, but power consumption increases and connection latency increases
Solution Approach 1:
The patent merges multiple physical cells into a single virtual cell, allowing the UE to camp on the virtual cell rather than individual physical cells. This merging eliminates the need for frequent cell reselection measurements when the UE moves between physical cells within the virtual cell coverage area, significantly reducing power consumption while maintaining connection accuracy through the unified virtual cell identity
Data Source
AI summary
Methods, systems, and devices for wireless communications are described that provide for user equipment (UE) camping in a virtual cell. A UE may camp in a virtual cell and may be in an idle mode or an inactive mode in the virtual cell. The UE may transition out of the idle or inactive mode and switch from camping in the virtual cell to connecting to a physical cell encompassed by the virtual cell through reselection, redirection, and handover procedures. The virtual cell may include a central unit and multiple distributed units, which may be configured in various physical implementations. Additionally, the virtual cell may be limited to broadcast only or selective unicast signaling.