Uplink Control Information Transmission via Secondary Cell Group
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Solution Overview
Problem
The increasing number of user equipment (UEs) and the corresponding data and control information in wireless communication systems pose a challenge due to limited resources, necessitating an efficient method for transmitting and receiving uplink/downlink data and control information using limited radio resources.
Innovation Solution
The implementation of a method that configures a secondary cell group for user equipment, allowing for the transmission of uplink control information (UCI) through both primary and secondary cells, using a physical secondary uplink control channel (PUCCH) and physical uplink shared channel (PUSCH), optimizing resource utilization across multiple cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation technology is used to aggregate multiple UL/DL frequency blocks, then the bandwidth and data throughput are improved, but the device complexity and resource management difficulty increase
Solution Approach 1:
The patent segments the uplink control information into two distinct groups: ACK/NACK information for primary cell group and SRS for secondary cell group. This segmentation allows independent resource allocation and management for each type of control information, simplifying the overall resource management complexity while maintaining the benefits of carrier aggregation for high data throughput.
2Productivity
If the number of user equipment and data transmission is increased, then the system capacity and productivity are improved, but the loss of information and interference increase
Solution Approach 1:
The patent merges the transmission of ACK/NACK and SRS information into a single PUCCH resource when they are mapped to the same resource. This combining approach reduces resource fragmentation and minimizes interference between control signals, allowing the system to support more user equipment and increase overall capacity while maintaining reliable control information transmission.
3Reliability
If multiple PUCCH resources are allocated for different cell groups, then the reliability of control information transmission is improved, but the device complexity and resource overhead increase
Solution Approach 1:
The patent implements dynamic resource selection where the UE determines whether to transmit ACK/NACK and SRS on separate or combined PUCCH resources based on current channel conditions and resource availability. This dynamic approach maintains high transmission reliability by adapting to varying conditions while reducing configuration complexity compared to always using separate dedicated resources.
Data Source
AI summary
The present invention provides a method and device for transmitting/receiving an uplink signal. When an Scell group including only Scells is set for a user equipment of the present invention and one of the Scells included in the Scell group is set as a cell (hereinafter, “Acell”) in which a PUCCH can be transmitted, UCI of a particular cell group can be transmitted through a Pcell if the particular cell group is a Pcell group having the Pcell and can be transmitted through the Acell of the Scell group if the particular cell group is an Scell group.