PRACH RO Time-Domain Configuration for Larger Subcarrier Spacing
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Solution Overview
Problem
Existing communication protocols are unable to support larger subcarrier spacings for PRACH slots beyond the configured limits, necessitating a redesign of reference slots and parameter sets to accommodate higher PRACH subcarrier spacings.
Innovation Solution
A method and apparatus that determine RO time-domain resource configuration by obtaining a subcarrier spacing of a reference time unit based on a first rule, using parameters configured or extended by signaling or predefined by protocol, to support larger PRACH subcarrier spacings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing configuration tables are used with 60-kHz reference slot, then the system maintains compatibility with current protocols, but the number of PRACH slots within a reference slot is limited to 1 or 2, preventing support for subcarrier spacings greater than 120 kHz
Solution Approach 1:
The patent changes the reference slot subcarrier spacing from 60 kHz to 120 kHz, and adjusts the number of slots per reference slot accordingly. This parameter change allows the system to support larger PRACH subcarrier spacings (240 kHz, 480 kHz, 960 kHz) without requiring a complete redesign of the RO time-domain configuration framework, thereby improving adaptability while controlling complexity
Solution Approach 2:
The patent introduces dynamic configurability where the number of PRACH slots within a reference slot can be flexibly adjusted based on the actual subcarrier spacing being used. This allows the system to adapt to different subcarrier spacing values dynamically, supporting both legacy and advanced scenarios without fixed limitations
2Productivity
If the number of PRACH slots within a reference slot is increased to support larger subcarrier spacings, then the system can accommodate subcarrier spacings greater than 120 kHz, but the existing configuration table structure becomes insufficient
Solution Approach 1:
The patent modifies key parameters including the reference slot subcarrier spacing (to 120 kHz) and the number of slots per reference slot (to support up to 8 slots). These parameter changes enable the configuration tables to support larger subcarrier spacings while maintaining a structured approach that doesn't completely overhaul the existing table framework
Solution Approach 2:
The patent segments the configuration approach by separating the reference slot definition from the specific PRACH occasion configurations. This allows the reference slot to be defined with flexible parameters while the actual PRACH configurations can be independently adjusted, making the configuration tables more adaptable to different subcarrier spacing requirements
Data Source
AI summary
A Random access Occasion (RO) time-domain resource configuration method and apparatus and an electronic device are provided. The RO time-domain resource configuration method is performed by a terminal, and includes: obtaining a subcarrier spacing of a reference time unit determined according to a first rule; and determining, based on a first information set and the subcarrier spacing of the reference time unit, RO time-domain resource configuration information that is in each subframe and that is used for transmitting a random access preamble. Parameters of the first information set are obtained in at least one of the following manners: parameters configured by second configuration signaling; obtained by extending the parameters configured by the second configuration signaling; parameters predefined by a protocol; or obtained by extending the parameters predefined by the protocol.