Positioning-Aided New Radio RACH Selection for UE Capability Matching
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing random access channel (RACH) procedures for user equipment (UEs) with varying capabilities, particularly in New Radio (NR) networks, leading to inefficiencies in resource allocation and power consumption.
Innovation Solution
The proposed solution involves using positioning state information (PSI) to select and configure RACH procedures based on UE-specific positioning measurements, enabling more efficient resource allocation and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional RACH procedures are used for all UEs, then system compatibility is maintained, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent segments the RACH procedure into multiple types (first type and second type) based on UE positioning capabilities. UEs are divided into different groups: those with positioning capabilities use the first type with PSI-based optimization, while UEs without positioning capabilities use the second type with traditional procedures. This segmentation allows resource allocation efficiency to improve for capable UEs while maintaining system compatibility for all devices.
Solution Approach 2:
The patent introduces dynamic selection of RACH procedures based on real-time UE positioning state information. The network can dynamically determine which RACH type to use based on UE capability indicators and positioning measurements. This dynamic adaptation enables the system to optimize resource allocation for UEs with positioning capabilities while maintaining compatibility with legacy UEs, resolving the contradiction between productivity and adaptability.
2Measurement precision
If positioning measurements are continuously obtained, then positioning accuracy is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by obtaining positioning measurements only when necessary for RACH procedure selection, rather than continuously. The UE performs positioning measurements conditionally based on whether positioning capability is needed for the current RACH optimization, reducing unnecessary power consumption while maintaining sufficient positioning accuracy for the specific application.
Solution Approach 2:
The UE autonomously determines whether to perform positioning measurements based on its capability indicators and network configuration. The system enables UEs to self-manage their positioning measurement activities, performing measurements only when they can benefit from positioning-aided RACH procedures, thereby reducing overall power consumption while maintaining measurement precision when needed.
3Productivity
If RACH procedures are customized for individual UEs, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent customizes RACH procedures by changing key parameters such as resource allocation, timing, and frequency based on UE positioning capabilities. Instead of creating entirely different procedures, the system modifies existing RACH parameters (e.g., RACH occasions, preambles, resource blocks) according to UE capability indicators, achieving communication efficiency improvement while controlling system complexity through parameter-based differentiation.
Solution Approach 2:
The patent designs the RACH system to be universal by creating a framework that handles both positioning-capable and positioning-capable UEs through a unified procedure structure. The same basic RACH mechanism serves multiple functions: traditional access for legacy UEs and positioning-aided access for advanced UEs. This multi-functionality approach improves communication efficiency for capable UEs without significantly increasing overall system complexity.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may transmit, to a base station, an indication of a selected random access channel (RACH) procedure that is selected based at least in part on positioning state information (PSI) associated with the UE, wherein the PSI is based at least in part on one or more positioning measurements obtained by the UE; and receive, from the base station, a configuration of resources for the selected RACH procedure. Numerous other aspects are provided.