PUCCH Resource Configuration for Multicast HARQ Feedback
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Solution Overview
Problem
Existing communication systems lack a solution for effectively using physical channels to carry HARQ feedback bits in multicast and broadcast scenarios, particularly in cellular communication with high coverage requirements.
Innovation Solution
Configuring physical uplink control channel (PUCCH) types and resources for terminals to transmit feedback information, allowing terminals to determine appropriate PUCCH resources based on network device configurations, ensuring accurate HARQ acknowledgment and non-acknowledgment feedback in multicast and broadcast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical channels are configured for HARQ feedback in multicast and broadcast scenarios, then transmission reliability is improved, but device complexity increases due to the need to configure and manage multiple PUCCH types and resources
Solution Approach 1:
The patent applies parameter changes by configuring different PUCCH types (first PUCCH type for short feedback, second PUCCH type for long feedback) with distinct time-frequency resource characteristics. The network device dynamically selects which PUCCH type to use based on transmission conditions, changing the physical channel parameters to optimize between reliability and complexity for each specific scenario.
Solution Approach 2:
The patent implements dynamics by making the PUCCH configuration adaptive rather than static. The network device can dynamically switch between different PUCCH types and resource allocations based on real-time transmission conditions, allowing the system to adjust its complexity level according to the actual reliability needs of each multicast or broadcast transmission.
2Adaptability or versatility
If multiple PUCCH types are configured for different feedback scenarios, then adaptability is improved, but ease of operation deteriorates due to increased configuration management overhead
Solution Approach 1:
The patent applies segmentation by dividing the feedback mechanism into distinct PUCCH types with specific functions. The first PUCCH type handles short feedback scenarios while the second PUCCH type handles long feedback scenarios. This segmentation allows each type to be optimized independently while simplifying the overall management through clear functional separation.
Solution Approach 2:
The patent implements universality by designing a unified PUCCH configuration framework that can accommodate multiple PUCCH types through a single configuration signaling mechanism. The network device uses universal configuration parameters that can map to different specific PUCCH types, allowing one configuration system to serve multiple feedback scenarios without requiring separate management for each type.
3Measurement precision
If PUCCH resources are allocated for HARQ feedback, then information accuracy is improved, but loss of energy increases due to additional uplink transmissions
Solution Approach 1:
The patent applies partial action by implementing selective PUCCH transmission where the network device only activates and configures PUCCH resources when HARQ feedback is actually needed for reliable reception. In scenarios where feedback is not critical or where the terminal is certain about successful reception, the system can omit PUCCH transmissions, thereby reducing energy consumption while maintaining information accuracy when necessary.
Data Source
AI summary
A feedback information sending method includes: a terminal receives configuration signaling sent by a network device, the configuration signaling being used for configuring at least one PUCCH type of feedback information sent by the terminal; and the terminal determines at least one PUCCH resource on the basis of the at least one PUCCH type, and sends the feedback information to the network device by means of the at least one PUCCH resource.