Hierarchical Mobility Paging for Beam-Sweeping Resource Reduction
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Solution Overview
Problem
Directional beam-sweeping in wireless communication systems consumes excessive communication resources, particularly when user equipment (UE) is in a radio resource control (RRC) inactive or idle state, as it requires transmitting signals over multiple beams.
Innovation Solution
Implement hierarchical mobility by configuring networks with multiple areas, using different communication resources for signal transmission within these areas, such as tracking areas, radio access network area codes, and radio access network based notification areas, to reduce resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If directional beam-sweeping is used to transmit signals, then coverage area is improved, but communication resource consumption increases
Solution Approach 1:
The network area is segmented into multiple notification areas (RNA), each with its own unique identifier. UEs in RRC inactive state are paged only within their specific RNA rather than across the entire network area, dividing the paging task into smaller, more efficient segments that reduce overall resource consumption while maintaining full coverage capability.
2Reliability
If beam-sweeping pattern is used for signal transmission, then signal coverage is improved, but resource usage increases
Solution Approach 1:
Different notification areas are assigned different paging resource configurations (time/frequency resources, paging identifiers). This local differentiation allows the network to page UEs efficiently within specific geographic or logical areas without wasting resources transmitting paging messages across the entire network, achieving localized optimization of resource usage while maintaining reliable signal delivery.
Data Source
AI summary
Techniques are described herein for signaling procedures that use a hierarchical mobility, which may be applied when a user equipment (UE) is operating in a radio resource control (RRC) inactive state or the RRC idle state. A wireless communication system may be configured with a plurality of areas in which one or more networks are established for communicating certain types of signals. Examples of the areas associated with networks may include a tracking area (TA), a radio access network area code (RAN-AC), a radio access network based notification area (RNA). A synchronization signal or a paging signal may be transmitted using a first set of communication resources in a first area, while the synchronization signal or the paging signal may be transmitted using a second set of communication resources in a second area different than the first set of communication resources.