Random Access Preamble Grouping for Accurate 6G RNTI Identification
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Solution Overview
Problem
There is a need to enhance the random access procedure in next-generation wireless communication systems, particularly for 6G communication systems, to support higher data rates and ultra-low latency, which are crucial for enabling services such as truly immersive extended reality, high-fidelity mobile holograms, and remote surgery.
Innovation Solution
A method and system for identifying a radio network temporary identifier (RNTI) in a random access procedure by using subcarrier spacing parameters, including s_id, t_id, f_id, and ul_carrier_id, to efficiently manage the random access process in 6G communication systems, especially when the subcarrier spacing exceeds 120 kHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If subcarrier spacing larger than 120 kHz is used for random access preamble transmission, then data rate and spectral efficiency are improved, but identification accuracy of RNTI deteriorates due to parameter calculation errors
Solution Approach 1:
The patent changes the calculation parameters for RNTI identification based on subcarrier spacing conditions. When subcarrier spacing exceeds 120 kHz, it uses a different formula: RNTI = 1 + s_id + 14 × t_id + 14 × 80 × f_id + 14 × 80 × 8 × ul_carrier_id, where t_id is calculated as floor(slot_index / 8). This parameter adaptation resolves the contradiction by maintaining identification accuracy while supporting higher data rates.
2Productivity
If subcarrier spacing larger than 120 kHz is used, then spectral efficiency is improved, but system complexity increases due to multiple parameter sets
Solution Approach 1:
The patent implements dynamic parameter selection based on subcarrier spacing conditions. The system automatically adapts the RNTI calculation method according to whether the subcarrier spacing exceeds 120 kHz, making the system flexible and efficient while managing complexity through conditional logic rather than multiple independent systems.
3Ease of operation
If conventional RNTI identification method is used with subcarrier spacing > 120 kHz, then device simplicity is maintained, but time synchronization accuracy deteriorates
Solution Approach 1:
The patent modifies the time parameter calculation (t_id) based on subcarrier spacing. For subcarrier spacing > 120 kHz, it uses t_id = floor(slot_index / 8), which provides accurate time synchronization for high-speed transmission while maintaining clear implementation rules that balance simplicity and precision.
Data Source
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AI summary
The disclosure relates to a 5th generation (5G) communication system or a 6th generation (6G) communication system for supporting higher data rates beyond a 4th generation (4G) communication system such as long term evolution (LTE). A method and an apparatus for selecting random access group and identifying radio network temporary identifier (RNTI) for random access procedure in next generation wireless communication system are provided.