PUCCH UCI Transmission Segmentation for CSI and HARQ-ACK Decoding
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Solution Overview
Problem
In LTE-A systems, the simultaneous transmission of periodic CSI and HARQ-ACK on a physical uplink control channel can lead to PDCCH loss, causing incorrect decoding and misinterpretation of CSI information as ACK/NACK, resulting in poor UCI transmission performance due to the base station's inability to accurately distinguish between periodic CSI and HARQ-ACK.
Innovation Solution
A method involving the acquisition of a resource index for a PUCCH, determining a sequence index for an orthogonal sequence, and applying a cyclic shift to the reference signal, allowing for the proper encoding and transmission of periodic CSI and HARQ-ACK on the PUCCH, ensuring correct decoding and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If periodic CSI and HARQ-ACK are transmitted simultaneously on PUCCH, then the uplink control information transmission efficiency is improved, but the base station cannot accurately distinguish between periodic CSI and HARQ-ACK leading to decoding errors
Solution Approach 1:
The patent segments the UCI transmission by dividing it into two distinct parts: periodic CSI transmission on first uplink resources and HARQ-ACK transmission on second uplink resources. This segmentation allows the base station to separately decode and accurately distinguish between CSI and HARQ-ACK information, resolving the contradiction between transmission efficiency and decoding accuracy.
2Stability of the object's composition
If periodic CSI and HARQ-ACK are transmitted on the same uplink subframe, then the reporting timing is synchronized, but PDCCH loss occurs causing incorrect decoding
Solution Approach 1:
The patent segments the transmission resources in time by allocating periodic CSI to first uplink resources and HARQ-ACK to second uplink resources within the same uplink subframe. This temporal segmentation maintains synchronization while preventing PDCCH loss and incorrect decoding by separating the information streams.
Solution Approach 2:
The patent introduces a time dimension distinction within the uplink subframe by assigning different resource allocations (first uplink resources vs. second uplink resources) to CSI and HARQ-ACK. This dimensional separation allows both information types to coexist without interference while maintaining overall timing synchronization.
3Device complexity
If CSI and HARQ-ACK are multiplexed on PUCCH, then the control channel resource utilization is improved, but the transmission performance deteriorates due to interference
Solution Approach 1:
The patent segments the PUCCH resources into distinct first uplink resources for periodic CSI and second uplink resources for HARQ-ACK. This segmentation reduces mutual interference between CSI and HARQ-ACK while maintaining efficient resource utilization, thereby improving transmission performance.
Data Source
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AI summary
Embodiments of the present invention provide a method for transmitting control information, a user equipment and a base station. The method includes: acquiring a resource index of a physical uplink control channel PUCCH, where the PUCCH is used for transmitting uplink control information UCI; acquiring a sequence index of an orthogonal sequence of the PUCCH according to the resource index, and acquiring the orthogonal sequence according to the sequence index; acquiring a cyclic shift of a reference signal of the PUCCH according to the sequence index; and transmitting the UCI to the base station on the PUCCH according to the orthogonal sequence and the cyclic shift. In the embodiments of the present invention, a cyclic shift of a reference signal of a PUCCH channel for transmitting UCI is acquired according to a sequence index, and the UCI is transmitted on the PUCCH according to the cyclic shift and a corresponding orthogonal sequence, which can enhance transmission performance of the UCI.