PUCCH Cell Switching for HARQ-ACK Uplink Control Timing
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Solution Overview
Problem
The existing mobile communication systems face challenges in managing explosive data traffic, high transmission rates, large numbers of connected devices, low latency, and energy efficiency, particularly in handling uplink control information and HARQ-ACK transmissions during cell switching.
Innovation Solution
A method and apparatus for transmitting and receiving uplink control information, including configuring HARQ-ACK transmission modes based on ACK or NACK values, and performing HARQ-ACK operations on switched PUCCH cells or dropping them during cell switching intervals, to optimize HARQ-ACK transmission and multiplexing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ-ACK transmission is performed during cell switching interval, then transmission reliability is improved, but transmission time is increased
Solution Approach 1:
The patent applies dynamics by making the HARQ-ACK transmission behavior adaptive based on the current cell switching state. The UE dynamically determines whether to transmit HARQ-ACK on the switched PUCCH cell or drop it based on real-time conditions, optimizing the balance between reliability and time loss in a changing network environment
Solution Approach 2:
The patent changes the transmission parameter by introducing a configuration parameter that determines the HARQ-ACK transmission behavior. By modifying this parameter based on cell switching status, the system can switch between different transmission modes (transmit on switched cell vs. drop) to optimize performance under different conditions
2Productivity
If HARQ-ACK transmission mode is configured based on ACK/NACK values, then transmission efficiency is improved, but system complexity is increased
Solution Approach 1:
The patent applies local quality by configuring different HARQ-ACK transmission modes for different cells or transmission scenarios. Each cell can have its own transmission mode configuration (first mode based on ACK/NACK values or second mode based only on NACK values), allowing optimized local performance without requiring system-wide complexity
Solution Approach 2:
The patent segments the HARQ-ACK transmission into different modes that can be independently configured and applied to different cells or transmission occasions. This segmentation allows the system to manage complexity by handling each mode separately rather than as a single complex unified system
Data Source
AI summary
A method and apparatus for transmitting and receiving uplink control information in a wireless communication system are disclosed. A method performed by a user equipment in a wireless communication system according to an embodiment of the present disclosure may comprise the steps of: receiving configuration information on PUCCH cell switching; and receiving a PDSCH indicated by downlink control information. Here, HARQ-ACK transmission for the PDSCH may be configured to one of a first HARQ-ACK mode based on a ACK value and a NACK value and a second HARQ-ACK mode based on a NACK value. Based on the HARQ-ACK transmission being allocated to a time interval for PUCCH cell switching, the HARQ-ACK transmission is performed on a switched PUCCH cell or is dropped, according to a HARQ-ACK mode configured to the HARQ-ACK transmission.