Paging Beam Selection via Synchronization Signal Block Measurement
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Solution Overview
Problem
In new radio (NR) systems, the inefficiency of paging message transmission due to the lack of information about the exact location and best transmission or reception beam of user equipment (UE) in RRC_IDLE or RRC_INACTIVE states leads to excessive radio resource consumption, as all base stations in a tracking area must repeat paging messages in all beam directions.
Innovation Solution
The UE measures synchronization signal blocks (SS-blocks) to select suitable ones based on signal quality and then chooses a target SS-block using parameters irrelevant to the UE, reducing the number of downlink beams needed for paging message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all base stations repeat paging messages in all beam directions, then paging coverage is improved, but radio resource consumption increases significantly
Solution Approach 1:
The UE performs preliminary measurements of SS-blocks and determines its location information before the paging message is transmitted. This preliminary action allows the network to target the paging message to specific beams based on pre-acquired UE location data, avoiding the need for all base stations to transmit in all beam directions simultaneously.
Solution Approach 2:
The paging area is divided into multiple beams with different beam IDs, and the UE's location is segmented into specific beam regions. Instead of uniform omnidirectional transmission, the paging message is segmented and transmitted only in the specific beam directions where the UE is located, reducing overall radio resource consumption while maintaining coverage.
2Reliability
If UEs select downlink beams based on best signal quality, then connection reliability is improved, but signaling overhead increases due to multiple UEs selecting different beams
Solution Approach 1:
Instead of allowing each UE to independently select the best beam based on its local signal quality measurements, the patent applies local quality principles by using the UE's location information (which is locally available and unique to each UE's position) to determine the target beam. This approach maintains reliability by ensuring each UE connects through an appropriate beam while reducing signaling overhead by eliminating the need for UEs to report detailed signal quality measurements.
Solution Approach 2:
The patent changes the selection criterion from signal quality metrics to location-based beam ID parameters. By transforming the beam selection parameter from quality-dependent to location-dependent, the system achieves consistent beam selection for UEs in the same location region, reducing the diversity of beam selections and thereby reducing signaling overhead.
Data Source
AI summary
A paging method, a paging device and a readable storage medium thereof are disclosed. The method includes: measuring synchronization signal blocks to obtain signal qualities of the synchronization signal blocks, wherein each synchronization signal block respectively corresponds to at least one of downlink beams, a random access channel resource, and/or a random access preamble; selecting suitable synchronization signal blocks from the synchronization signal blocks based on the signal qualities, wherein the signal qualities of the suitable synchronization signal blocks satisfies a first predetermined condition; and transmitting a RACH resource and/or the random access preamble corresponding to the suitable synchronization signal blocks.