Inter-Site Carrier Aggregation Signaling Path Optimization
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Solution Overview
Problem
Wireless communication systems face inefficiencies in transmitting and receiving control information, particularly in inter-site Carrier Aggregation (CA) scenarios, due to latency and reduced resource control efficiency caused by legacy signaling methods.
Innovation Solution
Configuring specific signaling paths for control information within cell groups, allowing transmission and reception of control signals only within designated paths, optimizing the management and control of cell resources by dividing aggregated cells into PCell and SCell groups and determining appropriate paths for RRC, MAC, and UCI signaling based on cell group configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If legacy signaling methods are used in inter-site Carrier Aggregation, then existing system compatibility is maintained, but transmission latency increases and resource control efficiency decreases
Solution Approach 1:
The patent segments the cell groups into different types (first cell group with PCell, second cell group with SCells) and assigns different signaling paths for different cell groups. This segmentation allows optimized signaling for inter-site CA scenarios, reducing latency by directing control information through appropriate paths without affecting other cell group operations.
Solution Approach 2:
The patent applies different signaling path configurations based on the local characteristics of each cell group. First cell groups use one signaling path while second cell groups use another path, allowing each cell group to have optimized control information transmission according to its specific deployment scenario and requirements.
2Adaptability or versatility
If control information is transmitted through all available paths, then transmission flexibility is improved, but resource management complexity increases
Solution Approach 1:
The patent divides the signaling paths into distinct segments based on cell group type. By segmenting the paths and assigning them to specific cell groups, the system maintains flexibility in path selection while reducing complexity through clear, predefined routing rules that simplify resource management.
Solution Approach 2:
The patent introduces cell group configuration as an intermediary mechanism that mediates between the available signaling paths and the resource management functions. This intermediary structure provides flexible path selection capabilities while abstracting the complexity from the resource management layer, making the system easier to control and manage.
Data Source
AI summary
The present invention relates to a wireless communication system. In detail, the invention relates to a method for a terminal to transmit a UCI in a carrier aggregation-based wireless communication system, and to an apparatus therefor, wherein the method involves the steps of: forming a first cell group having a PCell; forming a second cell group having one or more SCells; receiving one or more data in the second cell group; and transmitting HARQ-ACK information on the one or more data through a PUCCH, wherein, when the first and second cell groups are managed by an identical base station, the HARQ-ACK information is transmitted in the PCell, and, when the first and second cell groups are managed by different base stations, the HARQ-ACK information is transmitted in the second cell group.


