Scrambling Sequence Generation for NR Data Transmission
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Solution Overview
Problem
Existing data transmission methods in New Radio (NR) systems face challenges in generating suitable scrambling sequences that meet the requirements of complex and dynamic data transmission scenarios, particularly in scenarios involving unlicensed frequency bands, where predicting subframe/slot timing is difficult, leading to delays and inflexible sequence generation.
Innovation Solution
A method for generating scrambling sequences based on predefined applied scenarios and high-layer indication information, using parameters such as Radio Network Temporary Identity (RNTI), scrambling identifiers, Control Resource Set (CORESET) identifiers, and time-domain information, allowing for flexible adaptation to different transmission scenarios without relying on constant time-domain information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If scrambling sequence generation relies on constant time-domain information, then the sequence generation is standardized and predictable, but transmission delays increase and flexibility is lost in dynamic scenarios
Solution Approach 1:
The patent pre-defines multiple scrambling sequence generation modes corresponding to different applied scenarios (e.g., licensed band, unlicensed band, different resource allocation types). The network device and terminal device both store these pre-configured modes, allowing immediate selection without real-time calculation or negotiation, thus reducing transmission delay while maintaining adaptability.
Solution Approach 2:
The patent introduces dynamic scenario-based parameter selection where the scrambling sequence generation parameters are dynamically chosen based on the current transmission scenario. The network device indicates the applied scenario through high-layer signaling, and both devices dynamically switch between pre-defined generation modes according to the indicated scenario, achieving flexibility without real-time computation overhead.
2Adaptability or versatility
If a single scrambling sequence generation method is used, then the implementation is simple, but it cannot meet requirements of complex and changeable transmission scenarios
Solution Approach 1:
The patent segments the scrambling sequence generation process into multiple independent modes, each optimized for specific scenarios (e.g., Mode 1 for licensed band with persistent allocation, Mode 2 for unlicensed band, Mode 3 for dynamic allocation). Each mode has its own parameter set and generation formula. The network device indicates which mode to use through high-layer signaling, allowing the system to select the appropriate segment without evaluating all possibilities, thus managing complexity while maintaining versatility.
Solution Approach 2:
The patent creates a universal scrambling sequence generation framework that can handle multiple transmission scenarios through a single unified mechanism. By defining multiple generation modes that cover different scenarios (licensed/unlicensed bands, persistent/dynamic allocation, different resource types), the system achieves multi-functionality where one framework serves all purposes. The network device's scenario indication and both devices' mode selection capability provide universal applicability across diverse transmission conditions.
3Measurement precision
If scrambling sequences are generated in real-time based on transmission parameters, then accuracy is high, but processing time increases in unlicensed bands where timing is unpredictable
Solution Approach 1:
The patent pre-calculates and stores multiple scrambling sequence generation configurations corresponding to different applied scenarios and parameter combinations. Instead of calculating sequences in real-time based on dynamic parameters, the system has pre-prepared generation modes that can be immediately activated. This preliminary preparation eliminates real-time computation delays while maintaining sequence accuracy through proper parameter matching.
Solution Approach 2:
The network device pre-configures and indicates the applied scenario to the terminal device through high-layer signaling before actual data transmission. Both devices store pre-defined scrambling sequence generation modes corresponding to different scenarios. When transmission occurs, both devices immediately select and apply the appropriate pre-configured mode without real-time parameter analysis or calculation, thus achieving rapid sequence generation with maintained accuracy through proper scenario-parameter matching.
Data Source
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AI summary
A data transmission method includes: generating a scrambling sequence in accordance with one or more first parameters, the one or more first parameters being determined in accordance with a predefined applied scenario and/or high-layer indication information; scrambling DCI using the generated scrambling sequence; and transmitting the scrambled DCI to a UE.