Cross-Carrier Repetition for 5G Decoding Reliability
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR and LTE technologies, face challenges in efficiently managing data repetition across multiple entities, leading to suboptimal decoding and reliability issues due to limited spectral efficiency and resource utilization.
Innovation Solution
The implementation of cross-carrier repetition techniques, where control information is used to schedule retransmissions across different frequency resources or component carriers, allowing for flexible and opportunistic use of available frequency resources for data retransmissions, enhancing decoding reliability and spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data repetition is performed on a single carrier, then the system structure is simple, but the spectral efficiency and decoding reliability are insufficient
Solution Approach 1:
The patent extends data repetition from a single carrier to multiple carriers (cross-carrier repetition), adding the carrier dimension to the repetition process. This allows the system to exploit multiple frequency resources simultaneously, improving decoding reliability through diversity without being constrained by the limitations of single-carrier repetition.
Solution Approach 2:
The patent establishes a universal mechanism where control information on one carrier can schedule data repetitions on multiple different carriers. This multi-functional approach allows a single control signal to manage retransmissions across diverse frequency resources, enhancing system flexibility and reliability while maintaining manageable complexity through standardized procedures.
2Productivity
If multiple frequency resources are utilized for retransmissions, then spectral efficiency improves, but the complexity of managing data repetition increases
Solution Approach 1:
The patent employs preliminary action by having the network prepare and signal multiple candidate carriers for potential data repetitions in advance. The control information includes pre-configured mappings between control carriers and data carriers, allowing the UE to efficiently manage multi-carrier repetitions without real-time complex decision-making, thus improving spectral efficiency while controlling management complexity.
Solution Approach 2:
The patent introduces control information as an intermediary mechanism that simplifies the management of multi-carrier repetitions. This control signaling acts as a mediator between the network's scheduling decisions and the UE's execution, providing structured instructions that map control carriers to data carriers and manage the complexity of coordinating multiple frequency resources for retransmissions.
3Reliability
If cross-carrier repetition is implemented, then decoding reliability and spectral efficiency improve, but the control information processing requirements increase
Solution Approach 1:
The patent segments the control information processing into distinct functional components: identifying the control carrier, extracting control information, determining the mapping to data carriers, and executing the repetitions. This segmentation allows each component to be handled systematically, reducing the overall processing complexity while enabling reliable cross-carrier repetition operations.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for cross-carrier repetition. A method that may be performed by a user equipment (UE) includes monitoring for an initial transmission of data from a network on a first entity, receiving control information indicating second entities for receiving retransmission repetitions of the data, and receiving the retransmission repetitions of the data via the second entities.