RA Partition Priorities for Consistent Random Access Selection
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Solution Overview
Problem
The challenge in wireless communication systems is the lack of well-defined procedures for selecting random access (RA) partitions and priorities, particularly for UEs with reduced capabilities (RedCap UEs) and features like Small Data Transmission (SDT), leading to inconsistent UE behavior and potential service interruptions.
Innovation Solution
A method for determining and selecting RA partitions based on associated features and priorities, including algorithms for selecting the most appropriate partition when none are applicable, and adjusting feature sets or classifying cells as barred if no suitable partition is found.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RA partitions are created for different feature combinations, then the ability to indicate multiple features during random access is improved, but the device complexity and difficulty of selecting the appropriate partition increases
Solution Approach 1:
The random access resources are segmented into multiple RA partitions, where each partition is dedicated to a specific feature or combination of features. This segmentation allows UEs to clearly identify which partition corresponds to which feature combination, simplifying the selection process while maintaining the ability to indicate multiple features simultaneously.
Solution Approach 2:
The network pre-configures and signals the RA partition configurations to UEs before the random access procedure. This preliminary action provides UEs with advance knowledge of which partition to select for their specific feature combination, eliminating the need for complex real-time decision-making during the random access attempt.
2Measurement precision
If RA partitions are dedicated to specific features, then the precision of feature indication is improved, but the loss of time for partition selection and potential service interruptions increases
Solution Approach 1:
The network provides RA partition configuration information in advance through system information or dedicated signaling. This allows UEs to determine the appropriate partition before initiating the random access procedure, ensuring precise feature indication without incurring additional time delays during the access attempt.
Solution Approach 2:
The patent enables autonomous UE behavior where the UE independently determines the appropriate RA partition based on its triggered features and the configured partition structure. This self-service capability eliminates the need for network-assisted partition selection, reducing signaling overhead and time loss while maintaining precise feature indication.
3Reliability
If priority associations are defined for RA partitions, then the reliability of feature indication is improved, but the device complexity for determining and selecting partitions increases
Solution Approach 1:
The patent introduces priority parameters associated with RA partitions to resolve conflicts when multiple partitions could apply. By changing the selection criterion from simple feature matching to priority-based selection, the system ensures reliable feature indication while providing a clear, deterministic decision-making process that reduces complexity.
Solution Approach 2:
Instead of having the network complexly determine which partition to assign, the patent inverts the approach by having the UE determine the appropriate partition based on simple rules and priority associations. This inversion simplifies the overall system complexity while maintaining reliability, as the UE follows straightforward selection logic rather than requiring complex network-side determination.
Data Source
AI summary
A communication device can determine a plurality of random access (“RA”) partitions configured by a network node in a communications network. The communication device can further determine one or more features associated with each of the plurality of RA partitions. The communication device can determine a set of triggered features that includes one or more features the communication device intends to use to perform a RA procedure to connect to the network node. The communication device can select a RA partition of the plurality of RA partitions based on a priority associated with a feature of the RA partition or a priority associated with a feature of another RA partition of the plurality RA partitions. The communication device can perform the RA procedure using the RA partition.