Uplink Control Information Transmission via Segmented Encoding
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Solution Overview
Problem
In LTE-A systems, the existing methods for transmitting ACK/NACK response information and periodic CSI simultaneously are inadequate, leading to decreased accuracy of CSI at the base station and reduced downlink throughput due to increased collisions with multiple serving cells, especially in scenarios beyond Rel-10 carrier aggregation.
Innovation Solution
A method where the UE determines, based on high-layer signaling and predefined rules, whether to transmit only ACK/NACK response information or both ACK/NACK response information and CSI simultaneously, using different encoding schemes with Reed-Muller codes to ensure maximum system throughput and reduce feedback delay, by cascading and dividing input sequences appropriately for PUCCH transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing methods are used to transmit ACK/NACK and periodic CSI simultaneously in LTE-A systems with multiple serving cells, then the transmission capacity is maintained, but the accuracy of CSI at the base station decreases and downlink throughput is reduced due to increased collisions
Solution Approach 1:
The patent segments the uplink control information by separating ACK/NACK response information and periodic CSI into different transmission resources or time slots. This segmentation prevents collisions between the two types of information, ensuring that CSI accuracy is maintained while ACK/NACK feedback is reliably delivered, thereby preserving downlink throughput performance.
Solution Approach 2:
The patent implements dynamic resource allocation and transmission timing adjustments based on the number of serving cells and collision probability. When collisions are detected or predicted, the system dynamically shifts transmission resources or adjusts timing, allowing flexible adaptation to maintain both CSI accuracy and throughput under varying system conditions.
2Adaptability or versatility
If the number of serving cells increases beyond Rel-10 carrier aggregation, then the system capacity and bandwidth are improved, but the collision probability between ACK/NACK and periodic CSI increases
Solution Approach 1:
The patent applies preliminary collision detection and avoidance mechanisms by predicting potential collisions between ACK/NACK and periodic CSI based on the number of serving cells. Before collisions occur, the system pre-adjusts transmission resources or timing, ensuring reliable transmission even as the number of serving cells increases beyond Rel-10 carrier aggregation limits.
3Productivity
If ACK/NACK and periodic CSI are transmitted simultaneously using existing encoding schemes, then the transmission efficiency is maintained, but the detection performance of both information types deteriorates
Solution Approach 1:
The patent applies different encoding schemes tailored to the specific requirements of ACK/NACK and periodic CSI. ACK/NACK uses one encoding approach optimized for reliability, while periodic CSI uses another encoding approach optimized for accuracy. This localized optimization of encoding quality for each information type maintains transmission efficiency while improving detection performance.
Data Source
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AI summary
The disclosure discloses a method and a device for transmitting uplink control information. The method includes that: uplink control information to be transmitted is determined on the basis of high layer signalling and/or a predefined rule, and the determined uplink control information is transmitted on a Physical Uplink Control Channel (PUCCH). The device for transmitting uplink control information includes: a determining unit configured to determine, on the basis of high layer signalling and/or a predefined rule, uplink control information to be transmitted; and a transmitting unit configured to transmit, on the PUCCH, the determined uplink control information. The disclosure can ensure the maximum system throughput, and can also reduce the feedback delay of downlink channel information.