PUCCH Format 3 Uplink Control Channel Multiplexing
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting control information, particularly in allocating resources for ACK/NACK signals in multi-carrier environments, which limits the capacity to handle increased UCI payloads.
Innovation Solution
The introduction of a new PUCCH format, referred to as PUCCH format 3, which employs DFT-precoding and time-domain OC at the SC-FDMA level, along with channel selection methods to efficiently transmit multiple ACK/NACK bits across multiple carriers, allowing for increased multiplexing capacity and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional PUCCH formats (1a/1b) are used for ACK/NACK transmission, then the system maintains backward compatibility and simple structure, but the multiplexing capacity is insufficient to handle increased UCI payloads in multi-carrier environments
Solution Approach 1:
The patent introduces PUCCH format 3 with modified parameters including DFT-precoding implementation, time-domain orthogonal cover codes, and extended resource allocation schemes. These parameter changes enable the system to handle increased UCI payloads by doubling multiplexing capacity at slot and subframe levels, while maintaining structured signal processing through defined mathematical transformations and resource mapping rules
2Quantity of substance
If resource allocation is increased to handle more ACK/NACK bits across multiple carriers, then the UCI payload capacity is improved, but the resource allocation complexity and system overhead increase
Solution Approach 1:
The patent segments the UCI transmission resources into distinct PUCCH format 3 structures with separate resource allocation for different ACK/NACK bits. By dividing the payload into manageable segments that can be independently encoded and mapped to specific time-frequency resources, the system increases payload capacity while maintaining organized resource management through defined segmentation rules for resource blocks and orthogonal cover codes
3Productivity
If DFT-precoding and time-domain OC are implemented at SC-FDMA level, then signal processing efficiency is improved, but the implementation complexity increases
Solution Approach 1:
The patent replaces traditional mechanical signal processing approaches with DFT-precoding and time-domain orthogonal cover code multiplication. This substitution enables more efficient signal processing by using mathematical transformations that can be implemented through algorithmic operations rather than complex hardware structures, improving productivity while managing implementation complexity through standardized mathematical procedures
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
The present invention relates to a wireless communication system, and more particularly, to an uplink control information transmitting/receiving method and device. A method for a terminal to transmit acknowledgement information in a wireless communication system according to an embodiment of the present invention includes: determining whether the transmission of a scheduling request is set in one uplink subframe, where acknowledgement information on downlink transmission in a downlink subframe set including M(M≥1) downlink subframes is to be transmitted; determining a Physical Uplink Control Channel (PUCCH) format and a resource with which the acknowledgement information is to be transmitted; and transmitting the acknowledgement information by using the PUCCH format and the resource. Here, if the transmission of the scheduling request is set in the one uplink subframe, there is no Semi-Persistent Scheduling (SPS) releasing Physical Downlink Control Channel (PDCCH) in the downlink subframe set. If the acknowledgement information corresponds to only one Physical Downlink Shared Channel (PDSCH) indicated by the detection of a corresponding Physical Downlink Control Channel (PDCCH) received on only a Primary Cell (PCell) in the downlink subframe set, and a Downlink Assignment Index (DAI) value of the PDCCH is 1, the acknowledgement information and the scheduling request may be transmitted using PUCCH format 1b.