Uplink Control Channel Design Using Frequency Division Multiplexing
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR networks, face challenges in efficiently managing uplink transmissions on physical uplink control channels (PUCCH) due to limited flexibility and scalability, which affects the ability of devices to determine network aspects efficiently during acquisition.
Innovation Solution
The solution involves using two or more physical uplink control channels (PUCCH) associated with different frequency bands within a regular burst period for uplink transmissions, employing frequency division multiplexing and adaptive frame structures based on payload size, allowing for efficient resource allocation and reduced peak-to-average power ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single PUCCH is used for uplink transmission, then device complexity is reduced, but adaptability and versatility of the system deteriorates
Solution Approach 1:
The patent segments the uplink control channel transmission by dividing the regular burst period into multiple frequency bands, with each band carrying a separate PUCCH. This segmentation allows the system to handle diverse uplink control information (UCI) types (HARQ-ACK, CSI, SR) with different priorities and requirements, thereby improving adaptability while maintaining manageable complexity through structured division.
Solution Approach 2:
The patent introduces frequency domain diversity by transmitting multiple PUCCHs across different frequency bands within the same regular burst period. This dimensional expansion from single-channel time-division to multi-channel frequency-division approach enhances system versatility, allowing simultaneous transmission of different UCI types with appropriate resource allocation and power control.
2Adaptability or versatility
If multiple PUCCHs are used for uplink transmission, then adaptability and versatility improve, but device complexity increases
Solution Approach 1:
The patent implements dynamic PUCCH resource allocation where the number, frequency position, and power levels of multiple PUCCHs are adaptively determined based on the type and size of uplink control information. The gNB configures multiple PUCCH resources with different parameters, and the UE dynamically selects and transmits on appropriate PUCCHs based on current transmission requirements, thereby achieving high adaptability without requiring fixed complex multi-channel structures.
Solution Approach 2:
The patent changes key transmission parameters including frequency position, power level, and resource allocation for each PUCCH based on the specific UCI type being transmitted. Higher priority UCIs (e.g., HARQ-ACK) are allocated to specific frequency bands with appropriate power levels, while lower priority UCIs (e.g., CSI) use other resources. This parameter-based differentiation enables versatile transmission while simplifying device logic through rule-based parameter selection.
3Productivity
If frequency division multiplexing is used for multiple PUCCHs, then resource allocation efficiency improves, but peak-to-average power ratio increases
Solution Approach 1:
The patent applies power backoff mechanisms that dynamically adjust the power level of each PUCCH based on its priority and the presence of other simultaneous transmissions. High-priority PUCCHs (e.g., HARQ-ACK) maintain higher power levels, while lower-priority PUCCHs (e.g., CSI, SR) use reduced power. This selective power parameter adjustment improves resource allocation efficiency while controlling the peak-to-average power ratio by avoiding simultaneous high-power transmission on all frequency bands.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the flexibility and scalability of uplink transmissions, improving the ability of devices to efficiently determine network aspects and manage resource allocation, thereby supporting diverse communication requirements in 5G NR networks.
Implementation Method 1
employing frequency division multiplexing and adaptive frame structures based on payload size
Data Source
AI summary
Wireless communication devices, such as a scheduled entity, are adapted to facilitate uplink transmissions on multiple physical uplink control channels (PUCCHs) of a regular burst period. According to one example, a scheduled entity may obtain a payload for an uplink transmission on a PUCCH. The scheduled entity may subsequently send the uplink transmission utilizing two or more physical uplink control channels (PUCCH) of a regular burst period, where each PUCCH is associated with a different frequency band of the regular burst period. According to one example, a scheduling entity may receive an uplink transmission, where the uplink transmission utilizes a first PUCCH of a regular burst period, and at least a second PUCCH of the regular burst period, each of the first and second PUCCHs being associated with respectively different frequency bands of the regular burst period. Other aspects, embodiments, and features are also included.