PRACH Occasion Configuration for Mixed-Capability Random Access
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in configuring random access resources, leading to increased overhead and energy consumption, particularly in networks supporting both legacy and new radio technologies.
Innovation Solution
The method involves configuring separate sets of PRACH occasions for UEs supporting and not supporting time-domain adaptation, allowing UEs to select appropriate PRACH occasions based on their capabilities, thereby optimizing resource usage and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate PRACH occasion configurations are provided for UEs supporting time-domain adaptation and those not supporting it, then resource allocation efficiency is improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent divides the PRACH occasion configuration into separate sets: a first set for UEs supporting time-domain adaptation and a second set for legacy UEs not supporting adaptation. This segmentation allows each UE type to use optimized resources appropriate to its capabilities, improving overall resource allocation efficiency while managing complexity through structured separation.
Solution Approach 2:
Different PRACH occasion configurations are applied to different UE groups based on their adaptation capabilities. The network can selectively apply time-domain adaptation parameters (such as different periodicities, offsets, or occasion densities) to specific UE types, ensuring that advanced UEs benefit from optimized resource usage while legacy UEs maintain compatibility with traditional configurations.
2Loss of energy
If PRACH occasions are configured for time-domain adaptation, then energy consumption is reduced, but system complexity increases due to multiple configuration sets
Solution Approach 1:
The patent enables dynamic PRACH occasion selection based on UE capabilities and network conditions. UEs supporting time-domain adaptation can dynamically adjust their PRACH transmission timing according to configured adaptation parameters, allowing the system to reduce energy consumption during low-activity periods while maintaining responsiveness when needed. This dynamic approach optimizes energy efficiency without permanently increasing system complexity.
Solution Approach 2:
The patent introduces configurable parameters for time-domain adaptation including adaptation periodicity, time offset, and occasion density modifiers. These parameters can be adjusted based on network load, UE capabilities, and service requirements, allowing flexible optimization of energy consumption while managing configuration complexity through standardized parameter sets.
Data Source
AI summary
Methods, systems, and apparatuses are provided for Random Access (RA) resource configurations in a wireless communication system, wherein a method for a UE comprises receiving a first configuration of random access at least for User Equipments (UEs) supporting Physical Random Access Channel (PRACH) adaptation in time domain and not for UEs not supporting PRACH adaptation in time domain, wherein the UE derives a first set of one or more PRACH occasions based on the first configuration, receiving a second configuration of random access at least for the UEs not supporting PRACH adaptation in time domain, wherein the UE derives a second set of one or more PRACH occasions based on the second configuration, selecting a first PRACH occasion among multiple PRACH occasions, wherein whether the multiple PRACH occasions can include a PRACH occasion from the first set of one or more PRACH occasions is based on at least a purpose of a random access procedure, and performing a first transmission on the first PRACH occasion during the random access procedure.