Uplink Control Information Transmission via PUSCH and sPUSCH
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Solution Overview
Problem
Current LTE systems face inefficiencies in transmitting and receiving uplink control information, particularly in terms of channel state information and HARQ-ACK feedback, due to limitations in transmission time intervals and resource allocation strategies.
Innovation Solution
The implementation of carrier aggregation and advanced resource allocation methods, including the use of shortened transmission time intervals and flexible mapping of channels, enables efficient transmission and reception of uplink control information through the use of PUCCH, PUSCH, sPUCCH, and sPUSCH channels, optimizing channel state information and HARQ-ACK feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If shortened transmission time intervals (sTTI) are used for uplink control information transmission, then transmission speed and latency are improved, but device complexity and resource allocation difficulty increase
Solution Approach 1:
The patent divides the uplink control information transmission into separate physical channels: PUCCH for control information and PUSCH for data. This segmentation allows independent optimization of each channel's resource allocation and processing, reducing overall system complexity while maintaining high transmission speed through the dedicated PUCCH path.
Solution Approach 2:
The patent implements pre-configured resource allocation patterns for sPUCCH transmissions, where resource blocks and time-frequency positions are predetermined based on downlink control information. This preliminary setup eliminates complex real-time resource allocation decisions, reducing device complexity while enabling fast sTTI transmission.
2Productivity
If multiple physical channels (PUCCH, PUSCH, sPUCCH, sPUSCH) are used for uplink control information, then transmission efficiency and adaptability are improved, but resource allocation complexity increases
Solution Approach 1:
The patent designs the PUCCH and PUSCH channels to serve multiple functions: PUCCH carries both channel state information and HARQ-ACK feedback, while PUSCH can carry data along with uplink control information. This multi-functionality reduces the need for separate dedicated channels, simplifying resource allocation while maintaining high transmission efficiency through flexible channel usage.
Solution Approach 2:
The patent implements dynamic resource allocation where the selection and configuration of PUCCH/PUSCH channels adapts to varying channel conditions and traffic requirements. Resource allocation is adjusted in real-time based on downlink control information and uplink grant parameters, enabling efficient utilization of available resources while managing complexity through standardized allocation rules.
3Adaptability or versatility
If flexible resource allocation and mapping methods are implemented, then adaptability to channel conditions is improved, but processing complexity and overhead increase
Solution Approach 1:
The patent employs parameter-based resource allocation where key parameters such as resource block indices, time-frequency positions, and modulation schemes are dynamically adjusted based on channel quality indicators and traffic requirements. This parameter-driven approach enables flexible adaptation to varying channel conditions while maintaining manageable processing complexity through standardized parameter sets and selection criteria.
Data Source
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AI summary
A terminal apparatus includes a receiver configured to receive a DCI format including an uplink grant, and a transmitter configured to transmit a PUSCH or an sPUSCH based on the uplink grant. A TTI of the PUSCH is one sub-frame. A TTI of the sPUSCH is shorter in value than one slot. In a case that a transmission of a channel quality indicator is triggered in response to a transmission of the PUSCH, the uplink control information is transmitted in the PUSCH. In a case that a transmission of a channel quality indicator is triggered in response to a transmission of the sPUSCH, a transmission of the uplink control information is dropped.