PUCCH HARQ-ACK Codebook Handling for Overlapping Uplink Resources
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Solution Overview
Problem
In scenarios where time domain resources of uplink channels with different priorities overlap, the transmission of low-priority channels is canceled, leading to potential loss of HARQ-ACK information, and existing solutions fail to specify how to construct the HARQ-ACK codebook effectively.
Innovation Solution
The method involves transmitting the first HARQ-ACK codebook through a second PUCCH after canceling the first PUCCH, with the first HARQ-ACK codebook including HARQ-ACK information corresponding to a second downlink signal, and specifying the construction mode based on semi-static configuration or DAI for type-1 and type-2 HARQ-ACK codebooks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is transmitted using a separate physical channel for each terminal device, then transmission reliability is improved, but resource waste occurs due to repeated transmission of identical control information
Solution Approach 1:
The patent merges control information intended for multiple terminal devices into a single physical channel transmission. The base station transmits the same control information through one physical channel that can be received and decoded by multiple terminal devices simultaneously, eliminating the need for separate physical channels for each device while maintaining transmission reliability.
Solution Approach 2:
The patent creates a universal physical channel that serves multiple terminal devices simultaneously. This single physical channel is designed to carry control information that can be utilized by multiple terminal devices, making the channel multi-functional and eliminating resource waste from dedicated per-device channels.
2Loss of energy
If control information is shared across multiple terminal devices, then resource efficiency is improved, but transmission reliability deteriorates due to potential interference
Solution Approach 1:
The patent segments the control information transmission process into distinct logical channels and physical channel components. By dividing the control information into different logical channels with specific formats and structures, the system can efficiently share the physical channel while maintaining reliability through proper segmentation and identification of control information for different terminal devices.
Solution Approach 2:
The patent introduces an intermediary layer of logical channel structure between the shared physical channel and the terminal devices. This logical channel framework acts as a mediator that organizes control information, enables efficient sharing of the physical channel resources, and maintains transmission reliability through structured information delivery.
3Reliability
If terminal devices continuously monitor control channels to ensure reliable reception, then transmission reliability is improved, but device power consumption increases
Solution Approach 1:
The patent implements periodic monitoring mechanisms where terminal devices monitor control channels at specific intervals rather than continuously. The system uses periodic scheduling and timing structures that allow devices to wake up, check for control information, and return to sleep mode, thereby maintaining reliable reception while significantly reducing power consumption compared to continuous monitoring.
Data Source
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AI summary
A control information transmission method and apparatus, and a terminal device. A terminal device receives a first downlink signal, hybrid automatic repeat request-acknowledgement (HARQ-ACK) information corresponding to the first downlink signal being transmitted by means of a first physical uplink control channel (PUCCH); the terminal device receives a second downlink signal, HARQ-ACK information corresponding to the second downlink signal being transmitted by means of a second PUCCH. The second PUCCH and the first PUCCH correspond to a same HARQ-ACK codebook; and the terminal device cancels the transmission of the first PUCCH and transmits the second PUCCH, the second PUCCH carrying a first HARQ-ACK codebook, and the first HARQ-ACK codebook at least comprising the HARQ-ACK information corresponding to the second downlink signal.