Multi-CC Repetition Transmissions for 5G Reliability
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G-NR networks, face challenges in efficiently configuring multiple component carrier repetition transmissions to enhance coverage and reliability, especially in scenarios with potential blockages and varying frequency bands.
Innovation Solution
The implementation of multi-component carrier (multi-CC) based repetition techniques, including single-DCI and multi-DCI schemes, to schedule and transmit PDSCH/PUSCH repetitions across multiple component carriers, utilizing carrier switching and redundancy versions for improved frequency diversity and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple component carrier repetition transmissions are configured to enhance coverage and reliability, then the robustness and frequency diversity are improved, but the device complexity and configuration difficulty increase
Solution Approach 1:
The transmission system is segmented into multiple component carriers, each carrying repetition transmissions independently. This segmentation allows the system to achieve frequency diversity by distributing transmissions across different frequency resources, thereby improving reliability without requiring a monolithic complex system design.
Solution Approach 2:
The patent introduces a new dimension of frequency diversity by utilizing multiple component carriers simultaneously. Instead of repeating transmissions only in the time domain, the system adds the frequency dimension by transmitting repetitions across multiple carriers, enhancing robustness against blockages and fading without increasing temporal complexity.
2Reliability
If repetition transmissions are used to improve coverage, then the signal robustness is enhanced, but the transmission time and latency increase
Solution Approach 1:
The system employs periodic repetition transmissions where the same data is transmitted multiple times at regular intervals. This periodic action allows the receiver to combine multiple transmissions for improved signal robustness while maintaining predictable timing patterns that minimize latency overhead compared to continuous retransmission schemes.
Solution Approach 2:
Multiple repetition transmissions across different component carriers are merged at the receiver through soft combining or selection diversity. This merging process allows the system to achieve signal robustness equivalent to multiple sequential transmissions while reducing the effective time loss by processing multiple carriers in parallel.
3Adaptability or versatility
If carrier switching is implemented for multi-CC repetitions, then the frequency diversity is improved, but the control information processing complexity increases
Solution Approach 1:
The carrier switching configuration and component carrier selection are established through preliminary action in the form of pre-configured carrier indicators and repetition patterns. This allows the system to achieve frequency diversity through pre-planned carrier switching rather than dynamic decision-making during transmission, reducing real-time control information processing complexity.
Data Source
AI summary
A computer-readable storage medium stores instructions to configure a UE for multiple component carrier repetition transmissions in a 5G NR network, and to cause the UE to perform operations comprising decoding DCI received via a PDCCH. The DCI includes transport block (TB) information and scheduling information. The scheduling information indicating scheduled transmissions of multiple repetitions of a PDSCH TB using multiple component carriers. A TB size associated with the scheduled transmissions is determined using the TB information. The multiple repetitions of the PDSCH TB am decoded. The multiple repetitions are received from one or more base stations during the scheduled transmissions. PDSCH data is determined based on the multiple repetitions of the PDSCH TB and the TB size.