Uplink Control Information Encoding for PUCCH Format 3
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Solution Overview
Problem
In LTE systems, the simultaneous transmission of periodic CSI and HARQ-ACK/SR information on PUCCH Format 3 channels leads to increased scheduling complexity and downlink throughput loss due to periodic CSI discard, necessitating improved channel encoding methods to maintain optimal demodulation performance.
Innovation Solution
The method involves determining specific parameters for channel encoding of periodic CSI and HARQ-ACK/SR information, using offset values and coefficients configured by signaling, to ensure the number of encoding symbols or bits does not exceed the channel's capacity, allowing for simultaneous transmission without compromising demodulation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic CSI and HARQ-ACK/SR information are transmitted simultaneously on PUCCH Format 3, then downlink transmission performance is improved, but the number of available encoding bits for each type of information is reduced
Solution Approach 1:
The patent changes the encoding parameters by introducing offset values and coefficients that are configured through signaling. These parameters dynamically adjust the number of encoding bits allocated to periodic CSI and HARQ-ACK/SR information, allowing the system to optimize the distribution of limited encoding resources based on current transmission conditions and requirements.
2Device complexity
If periodic CSI is discarded to avoid transmission conflicts, then encoding complexity is reduced, but scheduling complexity increases and downlink throughput capacity is lost
Solution Approach 1:
The patent performs preliminary determination of the number of encoding bits for periodic CSI and HARQ-ACK/SR information before actual transmission. By pre-calculating and allocating encoding resources based on configured offset values and coefficients, the system avoids transmission conflicts without needing to discard periodic CSI, thereby maintaining downlink throughput capacity while keeping encoding complexity manageable.
3Measurement precision
If the number of encoding bits is increased to maintain optimal demodulation performance, then demodulation performance is improved, but the channel capacity is exceeded when transmitting both periodic CSI and HARQ-ACK/SR information
Solution Approach 1:
The patent introduces configurable offset values and coefficients that allow dynamic adjustment of encoding bit allocation. By changing these parameters based on transmission conditions, the system can optimize demodulation performance for both periodic CSI and HARQ-ACK/SR information while ensuring the total number of encoding bits does not exceed the channel capacity of PUCCH Format 3.
Data Source
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AI summary
The embodiment of the present invention provides a method and an apparatus for encoding uplink control information. Herein, the method for encoding uplink control information comprises: determining the number of bits of first uplink control information or determining the number of bits of the first uplink control information and the number of bits of second uplink control information; determining a first parameter for channel encoding of the first uplink control information according to the number of bits of the first uplink control information, or determining a second parameter for channel encoding of the first uplink control information according to the number of bits of the first uplink control information and the number of bits of the second uplink control information; determining the number of encoding symbols or the number of encoding bits of the first uplink control information according to the first parameter and the number of bits of the first uplink control information, or determining the number of encoding symbols or the number of encoding bits of the first uplink control information according to the second parameter and the number of bits of the first uplink control information; encoding the first uplink control information according to the number of encoding symbols or the number of encoding bits of the first uplink control information.