Uplink Feedback Channel Selection for Mixed 5G Service Scheduling
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Solution Overview
Problem
Existing communication systems fail to satisfy the diverse service requirements of different service types in new-generation communication systems, as they use a single uplink control channel for information feedback within a time unit, which is inadequate for services like eMBB, URLLC, and mMTC.
Innovation Solution
A method where a user terminal determines the uplink transmission mode for feedback information, allowing multiplexing or separate transmission based on DCI formats, resource sets, scheduling categories, and user identifiers, enabling multiple uplink control channels within a time unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a user terminal uses a single uplink control channel for information feedback within a time unit, then the system complexity is reduced and ease of operation is improved, but the adaptability to different service requirements deteriorates
Solution Approach 1:
The patent segments the feedback mechanism by allowing multiple uplink control channels (PUCCH and PUSCH) to be used within the same time unit for different service types. Instead of a single unified feedback channel, the system divides feedback transmission into separate channels that can be independently configured and activated based on service requirements, enabling simultaneous support for eMBB, URLLC, and mMTC services with different feedback needs
Solution Approach 2:
The patent introduces dynamic selection of uplink control channels based on service type and scheduling conditions. The terminal determines whether to use PUCCH or PUSCH for feedback transmission dynamically, depending on the service requirements and DCI format received. This dynamic adaptability allows the system to optimize feedback transmission for each service type while maintaining operational flexibility
2Adaptability or versatility
If multiple uplink control channels are used for information feedback within the same time unit, then the adaptability to different service requirements is improved, but the device complexity and transmission coordination difficulty increase
Solution Approach 1:
The patent applies local quality by assigning different feedback transmission characteristics to different service types and channels. PUCCH is optimized for certain service types with specific feedback requirements, while PUSCH is configured for other service types with different needs. Each channel has its own transmission parameters, resource allocation, and modulation schemes tailored to the specific service requirements, allowing the system to maintain high adaptability while managing complexity through specialized optimization
Solution Approach 2:
The patent makes the uplink control channel system multi-functional by enabling both PUCCH and PUSCH to carry HARQ-ACK feedback information. The system can universally support different service types (eMBB, URLLC, mMTC) and different feedback scenarios through a unified framework that allows flexible channel selection. This multi-functionality reduces the need for separate dedicated channels for each service type, thereby managing overall system complexity
3Productivity
If multiple uplink control channels are used for information feedback within the same time unit, then the information feedback efficiency is improved, but the difficulty of detecting and measuring feedback information increases
Solution Approach 1:
The patent uses DCI format as an intermediary that carries explicit indications about which uplink control channel should be used for feedback transmission. The DCI format includes fields that specify the PUCCH resource indicator and other parameters that guide the terminal in selecting the appropriate channel. This intermediary mechanism simplifies the detection process at the base station by providing clear, pre-configured instructions about the feedback channel, thereby reducing the complexity of receiving and processing feedback from multiple channels
Data Source
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AI summary
The present disclosure provides an information feedback method and apparatus. The method is applied to a terminal and includes: receiving downlink data scheduled by one or more pieces of DCI and subjected to information feedback within a specific time unit; determining uplink transmission modes of uplink feedback information corresponding to the downlink data scheduled by the one or more pieces of DCI, where the uplink transmission mode comprises multiplexing transmission or separate transmission; and respectively sending corresponding one or more pieces of uplink feedback information to a base station within the specific time unit according to the uplink transmission modes, such that the base station obtains the corresponding one or more pieces of uplink feedback information within the specific time unit according to the uplink transmission modes.