Energy-Efficient Beam-Group Random Access for Emergency Uplink
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Solution Overview
Problem
Existing 5G wireless communication systems face challenges in managing varying resource demands from mobile devices with different quality-of-service classes, particularly in handling ultrareliable and low latency communications (URLLC) and enhanced mobile broadband (eMBB), especially in optimizing beam management and resource allocation for mobile user equipment.
Innovation Solution
A radio network node facilitates reduced-capability connection establishment by determining transitioning numbers and beam groups, allocating uplink resources, and broadcasting connection establishment information to idle user equipment, enabling efficient transmission during discontinuous receive off periods, particularly for emergency services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radio network node monitors all beams continuously to ensure reliable uplink traffic reception, then the reliability of communication is improved, but the energy consumption increases
Solution Approach 1:
The patent segments the set of beams into two categories: a first set of beams monitored during discontinuous receive off periods, and a second set of beams monitored during active periods. This segmentation allows the radio network node to reduce energy consumption by not monitoring all beams continuously, while still maintaining reliable uplink traffic reception for emergency services through selective beam monitoring.
Solution Approach 2:
The patent applies partial action by monitoring only a subset of beams (the first set) during discontinuous receive off periods rather than monitoring all beams. This partial monitoring is sufficient to capture emergency uplink traffic while consuming less energy than full beam monitoring would require.
2Manufacturing precision
If the radio network node allocates dedicated uplink resources for each beam to ensure precise beam management, then the beam management precision is improved, but the device complexity increases
Solution Approach 1:
The patent merges resource allocation for multiple beams by allocating a single set of uplink resources that can be used by user equipment across multiple beams in the first set. This merging approach maintains beam management precision for emergency services while reducing the complexity of managing separate resources for each beam.
Solution Approach 2:
The uplink resources allocated during discontinuous receive off periods are designed to be universal, serving multiple beams in the first set simultaneously. This multi-functionality allows the same resources to handle emergency uplink traffic regardless of which specific beam the user equipment is using, thereby reducing overall system complexity.
Data Source
AI summary
A radio network node may configure a user equipment with reduced-capability connection information usable to facilitate establishing a connection with the node during a discontinuous receive off period. From the reduced-capability connection information, the user equipment may determine a beam group. During discontinuous receive off operation at the node, the user equipment may transmit an emergency preamble according to the beam group, which may be associated with group random access resources, including a composite beam direction, monitored by the node. During discontinuous receive off operation, the node may avoid monitoring resources associated with individual beams corresponding to a beam group. The node may determine a number of user equipment transitioning to a connected mode with respect to a beam and determine the beam to be an important beam if a number of transitioning user equipment satisfies a transitioning criterion. A beam group may solely comprise an important beam.