PDCCH Repetition Configuration for Low-Complexity Combining
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Solution Overview
Problem
The existing 5G NR system's PDCCH repetition transmission in a time division multiplexing manner imposes high requirements on the terminal device's storage and receiving procedures, necessitating improved methods for combination and decoding.
Innovation Solution
A configuration method that restricts PDCCH candidate sequences to meet specific conditions, such as time intervals and resource usage, allowing the terminal device to perform combination and decoding efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH repetition transmission is performed in TDM manner, then receiving performance is improved through combination and decoding, but storage and receiving procedure complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the time interval parameter between repeated PDCCH transmissions. By configuring the time interval to be within a specific range (less than or equal to a first threshold), the patent optimizes the balance between combination gain and terminal device complexity, allowing effective combination and decoding while managing storage requirements.
Solution Approach 2:
The patent introduces dynamic configuration of PDCCH repetition parameters through network signaling. The network can dynamically adjust the time interval and number of repetitions based on channel conditions and terminal capabilities, enabling the system to adaptively optimize receiving performance while controlling terminal complexity through capability reporting mechanisms.
2Reliability
If multiple PDCCH candidates are stored for combination and decoding, then combination gain is achieved, but storage resource requirements increase
Solution Approach 1:
The patent controls the quantity of stored PDCCH candidates by parameterizing the time interval between repetitions. By setting the time interval parameter appropriately, the patent ensures that candidates are stored only within a manageable time window, achieving combination gain while limiting storage resource consumption to a first threshold.
3Reliability
If PDCCH repetition transmission is configured without restrictions, then receiving performance improves, but terminal device complexity increases
Solution Approach 1:
The patent segments the PDCCH repetition transmission into manageable groups by introducing a first condition that divides candidates into specific time intervals. This segmentation allows the terminal to process and store candidates in organized batches rather than as a monolithic set, reducing overall complexity while maintaining receiving performance.
Solution Approach 2:
The patent implements dynamic complexity management through capability reporting and conditional configuration. The terminal reports its capabilities to the network, which then dynamically adjusts the repetition configuration to match terminal capabilities, ensuring optimal performance without exceeding device complexity limits.
Data Source
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AI summary
Embodiments of this application disclose a PDCCH repetition transmission configuration method and a related apparatus. The method includes: A terminal device receives a first message, and parses the first message. The first message includes a configuration that is related to PDCCH repetition transmission, and the configuration is related to the PDCCH repetition transmission is for determining M groups of PDCCH candidate sequences. Each group of PDCCH candidate sequences includes K PDCCH candidates, the K PDCCH candidates are for sending same downlink control information, and the K PDCCH candidates included in each group of PDCCH candidate sequences are separately located on different symbols. A PDCCH candidate in the M groups of PDCCH candidate sequences meets a first condition. According to embodiments of this application, the terminal device may be supported to perform combination and decoding, and when the PDCCH repetition transmission is performed in a TDM manner, a combination gain is obtained and complexity of the terminal device is reduced.