Inter-eNB Carrier Aggregation via Dedicated PUCCH
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Solution Overview
Problem
Conventional LTE-A systems are limited to intra-eNB carrier aggregation, which restricts bandwidth scalability and system throughput, and do not support efficient inter-eNB communication for high-speed data transmission.
Innovation Solution
Implementing inter-eNB carrier aggregation methods that allow multiple base stations to share a common uplink frequency for transmitting and receiving physical data and control channels, enabling broader bandwidth and improved peak data rates through carrier aggregation configuration and power control mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If intra-eNB carrier aggregation is used, then system compatibility with legacy LTE is maintained, but bandwidth scalability and system throughput are restricted
Solution Approach 1:
The patent segments the carrier aggregation function by introducing a dedicated control channel (PUCCH) for inter-eNB communication, separating control signaling from data transmission. This allows the system to maintain legacy LTE compatibility while enabling advanced inter-eNB carrier aggregation for enhanced bandwidth scalability.
Solution Approach 2:
The patent introduces a new intermediary control channel (PUCCH - Physical Uplink Control Channel for inter-eNB communication) that mediates between multiple eNBs. This dedicated control channel enables coordinated carrier aggregation across different eNBs while maintaining system manageability and compatibility.
2Productivity
If inter-eNB carrier aggregation is implemented, then peak data rate and system throughput are enhanced, but control channel transmission complexity increases
Solution Approach 1:
The patent segments control information transmission by dedicatedating a specific channel (PUCCH) for inter-eNB control signals, separating it from data channels. This segmentation simplifies the overall control mechanism by providing a dedicated pathway for coordination between eNBs, enabling enhanced throughput without proportionally increasing complexity.
Solution Approach 2:
The PUCCH channel serves multiple functions: it transmits control information for carrier aggregation, manages power control, and coordinates resource allocation across multiple eNBs. This multi-functionality reduces the need for separate dedicated channels, thereby enhancing system throughput while controlling complexity.
3Adaptability or versatility
If multiple base stations share common uplink frequency, then bandwidth is expanded for high-speed data transmission, but interference between base stations increases
Solution Approach 1:
The patent applies local quality by enabling different eNBs to operate with different power levels and transmission characteristics on the shared uplink frequency. Each eNB can adjust its transmission parameters locally based on its specific conditions, allowing bandwidth expansion while managing interference through differentiated local operations.
Solution Approach 2:
The patent implements feedback mechanisms where eNBs transmit control information about their transmission status and interference levels. This feedback enables dynamic adjustment of transmission parameters, allowing the system to expand bandwidth while continuously monitoring and mitigating inter-base station interference through closed-loop control.
Data Source
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AI summary
A physical channel transmission method using inter-eNB carrier aggregation is provided for improvement of peak data rate and system throughput in a wireless communication system. The physical channel transmission method of a terminal in a communication system supporting carrier aggregation includes receiving carrier aggregation configuration information from a network; aggregating a plurality of carriers according to the carrier aggregation configuration information; and transmitting an uplink control channel on a common uplink frequency on which a plurality of base stations join the carrier aggregation.