2-Step Random Access Resource Mapping for RedCap UE Separation
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Solution Overview
Problem
The integration of RedCap UEs with legacy UEs in 5G networks leads to adverse effects on RA performance due to resource occupancy, necessitating separate resource configurations to minimize interference.
Innovation Solution
Configuring dedicated preambles and PRUs for RedCap UEs, utilizing unused resources of legacy UEs to reduce interference, enabling early identification and separation of RedCap UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RedCap UEs share resources with legacy UEs during random access, then resource utilization efficiency is improved, but RA performance deteriorates due to interference
Solution Approach 1:
The patent segments the random access resources by creating separate preamble groups - one group for legacy UEs and another group for RedCap UEs. This segmentation allows each UE type to access dedicated resources, eliminating interference while maintaining overall resource utilization efficiency. The base station can identify and separate RedCap UEs based on their use of the dedicated preamble group.
2Reliability
If separate resource configurations are implemented for RedCap UEs and legacy UEs, then interference is reduced and RA performance is improved, but resource management complexity increases
Solution Approach 1:
The patent extracts a specific subset of preambles to form a dedicated group for RedCap UEs, separating them from the legacy UE preamble group. This extraction approach simplifies resource management by creating clear, distinct resource pools for each UE type, making it easier to track and manage resources without requiring complex shared resource allocation mechanisms.
Solution Approach 2:
The patent applies local quality by providing different resource configurations tailored to specific UE types. RedCap UEs receive dedicated preamble groups and associated PRU configurations optimized for their capabilities, while legacy UEs continue using their existing configurations. This localized optimization improves RA performance for each UE type without requiring complete system-wide reconfiguration.
3Loss of time
If RedCap UEs use dedicated preambles and PRUs, then early identification and separation is enabled, but resource allocation overhead increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring dedicated preamble groups and associated PRU resources for RedCap UEs before the random access procedure begins. This advance preparation enables the base station to immediately identify RedCap UEs when they use the dedicated preambles, reducing identification time without requiring complex real-time resource allocation decisions that would increase overhead.
Data Source
AI summary
Disclosed are methods for a RA. One embodiment of the subject application provides a method performed by a user equipment, comprising receiving configurations from a base station, and associating at least one first preamble for a first type of user equipments (UEs) with at least one first physical uplink shared channel (PUSCH) resource unit (PRU) configured for the first type of UEs or at least one unused second PRU configured for a second type of UEs according to at least one of a mapping indication, a mapping ratio, an ordering of the at least one first preamble, an ordering of the at least one unused second PRU or an ordering of the at least one first PRU. Related apparatuses are also disclosed.