PUCCH Serving Cell Configuration for Carrier-Aggregated Uplink Control
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Solution Overview
Problem
There is a need for improved methods and devices to transmit uplink control information and receive semi-persistent scheduling PDSCH in wireless communication systems, particularly in 3GPP NR systems, to enhance data transmission efficiency and resource management.
Innovation Solution
User equipment (UE) is configured to transmit a physical uplink control channel (PUCCH) based on carrier aggregation, using information on the PUCCH serving cell, which includes parameters for setting specific serving cells and periods, and to determine PUCCH resources and transmission timings based on subcarrier spacing and TDD configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic TDD is used to vary the number of OFDM symbols in uplink and downlink according to data traffic directions, then data transmission efficiency is improved, but system complexity increases due to slot configuration management
Solution Approach 1:
The patent implements dynamic TDD by allowing the base station to vary the number of downlink and uplink OFDM symbols in each slot according to real-time data traffic conditions. The slot configuration can be dynamically adjusted between different patterns (e.g., more downlink symbols when downlink traffic is heavy, more uplink symbols when uplink traffic dominates), enabling the system to adapt flexibly to changing traffic directions and improve overall transmission efficiency.
2Length of stationary object
If beamforming and massive MIMO technologies are used to alleviate path loss in mmWave band, then transmission distance is increased, but device complexity and cost increase
Solution Approach 1:
The patent employs beamforming technology that dynamically adjusts the phase and amplitude parameters of signals across multiple antenna elements to create focused directional beams. By changing these parameters, the system can steer beams toward specific users, concentrate transmission energy, overcome mmWave path loss, and extend effective transmission distance without requiring excessive transmit power.
Solution Approach 2:
The massive MIMO system uses a large number of antenna elements that serve multiple functions simultaneously: they enable spatial multiplexing for high data rates, provide beamforming capability for extended range, support user localization through angle of arrival estimation, and enable interference management. This multi-functionality allows a single antenna array to address multiple communication challenges.
3Reliability
If carrier aggregation is used for PUCCH transmission, then uplink control information transmission reliability is improved, but resource management complexity increases
Solution Approach 1:
The patent implements carrier aggregation by dividing uplink control information transmission across multiple component carriers. Different PUCCH transmissions can be segmented across different carriers, allowing the system to transmit control information redundantly or in parallel. This segmentation provides diversity against carrier-specific failures and improves reliability while distributing resource management across multiple carriers.
Data Source
AI summary
The present specification relates to a method, a device, and a system for transmitting a physical uplink control channel in a wireless communication system. The present specification discloses a terminal comprising: a communication module for receiving, from a base station, information on a PUCCH serving cell corresponding to a serving cell on which a PUCCH is to be transmitted, generating the PUCCH, and transmitting the generated PUCCH on the PUCCH serving cell; and a processor for configuring the PUCCH serving cell on the basis of the information on the PUCCH serving cell. The terminal can effectively transmit uplink control information.