5G NR Signal Scrambling via Frame Structure Parameters
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Solution Overview
Problem
The existing signal scrambling methods in LTE communications systems are not applicable to 5G NR due to differences in subcarrier spacings and frame structure parameters, necessitating a new approach for interference randomization and performance enhancement in various service scenarios.
Innovation Solution
A signal scrambling method and apparatus that determine an initial scrambling sequence based on time unit numbers corresponding to frame structure parameters, or a combination of scrambling identities and time unit numbers, to scramble signals effectively in 5G NR networks, supporting different slot structures, CBGs, and frame structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LTE signal scrambling mode is used, then the scrambling is simple and based on fixed frame structure parameters, but it is not applicable to 5G NR with different subcarrier spacings and bandwidth parts
Solution Approach 1:
The patent changes the parameters used for scrambling sequence initialization from LTE's fixed frame structure parameters to 5G NR's flexible parameters including slot numbers within bandwidth parts, subcarrier spacing configurations, and BWP identifiers. This allows the scrambling mechanism to adapt to different 5G NR frame structures while maintaining a consistent initialization approach.
Solution Approach 2:
The patent creates a universal scrambling initialization mechanism that works across multiple 5G NR scenarios (different subcarrier spacings, bandwidth parts, and frame structures) by using a unified parameter set that can accommodate various configurations, making the scrambling function universally applicable to all 5G NR cases.
2Adaptability or versatility
If different bandwidth parts with different frame structure parameters are used, then various service scenarios are supported, but the fixed LTE scrambling initialization method cannot accommodate these variations
Solution Approach 1:
The patent applies local quality by using BWP-specific parameters (such as the bandwidth part identifier and slot numbers within that specific BWP) to initialize scrambling sequences. This ensures that each bandwidth part has its own dedicated scrambling initialization parameters, providing local adaptability while maintaining overall system reliability through consistent methodology.
3Ease of operation
If scrambling is initialized only by slot number within a radio frame, then the implementation is simple, but it does not provide sufficient interference randomization for diverse 5G NR scenarios
Solution Approach 1:
The patent merges multiple parameters (BWP identifier, slot number within BWP, and subcarrier spacing configuration) into the scrambling sequence initialization process. This combination maintains relative simplicity by using a unified initialization formula while significantly improving interference randomization performance through the synergistic effect of multiple parameters working together.
Data Source
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AI summary
A signal scrambling method and apparatus, and a signal descrambling method and apparatus are disclosed. In the signal scrambling method, a communications apparatus scrambles a signal by using a scrambling sequence, and sends the scrambled signal. In the signal descrambling method, a communications apparatus receives a signal, and descrambles the signal by using a scrambling sequence. An initial value of the scrambling sequence is determined based on a time unit number corresponding to a frame structure parameter used for transmitting the signal, so that different scrambling sequences can be used to scramble signals that are transmitted by using different frame structure parameters. Therefore, interference randomization can be implemented for signal scrambling, and this can be applicable to various application scenarios in 5G NR to improve performance.