Layer 1 Cross-Carrier Repetition for Reliable SPS Decoding
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in ensuring reliable data transmission due to noise and interference, which can lead to improper decoding of data transmissions, especially in scenarios where retransmissions are not effectively managed across component carriers.
Innovation Solution
The implementation of layer 1 cross-carrier repetition techniques, where data transmissions and their repetitions are transmitted across different component carriers, allowing devices to combine and decode these transmissions more effectively, and generate a common ACK/NACK signal for successful data reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transmissions are sent across multiple component carriers with repetition, then reliability of data transmission is improved, but device complexity increases
Solution Approach 1:
The patent segments the data transmission process by dividing it across multiple component carriers (CCs). The original data transmission is split into multiple repetitions, each transmitted on a different CC within the same slot. This segmentation allows the system to improve reliability through diversity while managing complexity by organizing the transmission structure in a systematic way.
Solution Approach 2:
The patent introduces a new dimension to data transmission by utilizing the frequency domain across multiple component carriers. Instead of repeating transmissions in time (time domain), the invention repeats transmissions across different frequency resources (frequency domain), thereby improving reliability through frequency diversity without significantly increasing time delay.
2Manufacturing precision
If cross-carrier repetition is implemented to improve decoding accuracy, then manufacturing precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the receiving device evaluates the quality of received repetitions and provides feedback to the transmitting device. This feedback loop allows the system to adapt the transmission parameters, such as selecting which CCs to use for repetition based on channel conditions, thereby maintaining high decoding accuracy while simplifying operation through automated adaptation.
Solution Approach 2:
The patent introduces dynamic selection of component carriers for repetition based on real-time channel conditions. The system can dynamically choose which CCs to use for transmitting repetitions, allowing it to adapt to changing radio conditions and optimize decoding accuracy without requiring manual configuration or complex operational procedures.
3Reliability
If multiple repetitions are transmitted across different carriers, then reliability is improved, but loss of time increases
Solution Approach 1:
The patent employs periodic action by transmitting multiple repetitions of the same data within a structured time pattern. The repetitions are transmitted at specific intervals within the same slot across different CCs, creating a periodic transmission pattern that ensures reliable delivery while minimizing time loss through efficient resource utilization.
Solution Approach 2:
The patent maintains continuity of useful action by ensuring that repetitions are transmitted continuously across different CCs without significant delays. The systematic arrangement of repetitions across multiple carriers allows the receiving device to combine them efficiently, maintaining continuous data flow and minimizing idle time while improving reliability through redundant transmissions.
Data Source
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Figure 2A~2D
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AI summary
Apparatus, methods, and computer-readable media for facilitating layer 1 cross-carrier repetitions are disclosed herein. An example method for wireless communication includes determining a repetition configuration for semi-persistent scheduling (SPS) or a configured grant (CG) associated with a data transmission on a first entity and at least one repetition of the data transmission on a second entity. The example method also includes receiving the data transmission and the at least one repetition of the data transmission. The example method also includes combining the data transmission and the at least one repetition of the data transmission to decode the data transmission.