High/Low SCS PRACH Alignment Across 5G NR RACH Occasions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for improved alignment and communication efficiency in wireless communication systems, particularly in 5G NR, to enhance the transmission and reception of physical random access channels (PRACH) using different subcarrier spacings (SCS) to support diverse communication scenarios.
Innovation Solution
The method involves transmitting and receiving PRACH preambles and responses across multiple RACH occasions (ROs) with varying SCS durations, allowing for alignment and efficient communication between user equipment (UE) and base stations, utilizing specific PRACH slots and SCS configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PRACH transmission uses different SCS configurations for alignment, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting subcarrier spacing (SCS) configurations for PRACH transmission. The system configures different SCS values (e.g., 15 kHz, 30 kHz, 60 kHz, 120 kHz) based on communication scenarios, allowing flexible adaptation to different latency requirements and channel conditions while maintaining alignment between UE and base station
Solution Approach 2:
The patent implements dynamics by enabling flexible and dynamic SCS selection for PRACH occasions. The base station can configure multiple PRACH occasions with different SCS values, and the UE can adaptively select appropriate SCS based on current communication conditions, making the system responsive to changing requirements without fixed rigid structures
2Adaptability or versatility
If multiple PRACH slots are configured with different SCS, then adaptability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent uses parameter changes to configure multiple PRACH slots with different SCS values (15 kHz, 30 kHz, 60 kHz, 120 kHz) to adapt to various communication scenarios. Each SCS configuration is carefully parameterized with specific time durations and slot structures to maintain precise alignment between different numerologies
Solution Approach 2:
The patent applies nested doll by nesting PRACH occasions with different SCS configurations within a unified time framework. The higher SCS PRACH slots are time-aligned with lower SCS slots through careful configuration of slot durations and offsets, creating a nested structure where multiple numerologies coexist harmoniously within the same uplink framework
Data Source
AI summary
Apparatus, methods, and computer program products for SCS RO alignment are provided. An example method includes transmitting, to a base station, a physical random access channel (PRACH) preamble in one RACH occasion (RO) in a first set of ROs in one or more PRACH slots associated with a first subcarrier spacing (SCS), the one or more PRACH slots being within a duration defined based on a PRACH slots time duration for a second subcarrier spacing (SCS). The example method further includes receiving, from the base station, a PRACH response.