PUCCH Format 3 Resource for HARQ and CSI Transmission
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting uplink control information (UCI) due to limitations in hybrid automatic repeat request (HARQ) and channel state information (CSI) transmission, particularly in multi-radio dual connectivity (MR-DC) scenarios, where simultaneous UL transmissions through LTE and NR are challenging due to technical differences and UE hardware constraints.
Innovation Solution
The method involves configuring HARQ information and CSI/SR transmissions in specific subframes using PUCCH format 3, based on MR-DC settings, allowing efficient UCI transmission by differentiating from conventional methods and optimizing UL-DL configurations for improved HARQ timing and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If HARQ information and CSI/SR are transmitted separately using conventional PUCCH formats, then transmission reliability is maintained, but transmission efficiency and resource utilization deteriorate due to multiple separate transmissions and potential collisions
Solution Approach 1:
The patent combines HARQ information and CSI/SR into a single PUCCH format 3 transmission resource. This merging allows multiple control information types to be transmitted simultaneously in one resource allocation, improving transmission efficiency by eliminating the need for separate transmissions and reducing resource collisions between different control signals.
Solution Approach 2:
PUCCH format 3 is designed to serve multiple functions by accommodating both HARQ information and CSI/SR transmissions. This multi-functional approach allows a single PUCCH resource to handle diverse uplink control information requirements, optimizing resource utilization while maintaining reliable delivery of all control signals.
2Reliability
If multiple UCI transmissions are performed simultaneously through LTE and NR in MR-DC, then communication coverage and reliability are improved, but resource collisions and interference increase due to hardware constraints and technical differences
Solution Approach 1:
The patent segments the transmission of different control information types (HARQ and CSI/SR) into a structured format within PUCCH format 3. By organizing these transmissions in a coordinated manner with proper timing relationships, the system avoids resource collisions between LTE and NR transmissions while maintaining the reliability benefits of multi-radio operation.
3Adaptability or versatility
If conventional PUCCH formats are used for UCI transmission, then compatibility with existing systems is maintained, but resource utilization and transmission flexibility deteriorate
Solution Approach 1:
The patent implements dynamic resource allocation for PUCCH format 3, where the timing and resource assignment adapt based on MR-DC configuration and traffic conditions. This dynamic approach allows the system to optimize resource utilization for combined HARQ and CSI/SR transmissions while managing the complexity through standardized formatting and coordination rules.
Data Source
AI summary
In a method and device for a wireless communication system according to one embodiment of the present invention, downlink control information (DCI) for downlink data transmission on a primary cell (PCell) is received, a downlink assignment index (DAI) value included in the DCI is 1, the downlink data is received on the basis of the DCI, and hybrid automatic repeat request (HARQ) information about the downlink data is transmitted. In addition, on the basis of a channel state information (CSI) and/or scheduling request (SR) transmission set in a subframe in which the HARQ information is transmitted, (i) the HARQ information and (ii) the CSI and/or the SR are transmitted together in the subframe, and on the basis of multi radio-dual connectivity (MR-DC) being set in a terminal, (i) the HARQ information and (ii) the CSI and/or the SR are transmitted on a resource related to PUCCH format 3.