PUCCH Feedback Configuration for Multicast HARQ Coverage
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Solution Overview
Problem
Existing communication systems lack an effective solution for HARQ information feedback in multicast and broadcast scenarios, particularly in New Radio (NR) MBMS, where only NACK feedback is required, ensuring coverage and accurate transmission performance.
Innovation Solution
Configuring PUCCH types and resources for terminals to enable ACK or NACK feedback, allowing terminals to determine appropriate PUCCH resources based on network coverage conditions, thereby improving transmission accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If only NACK feedback is used in multicast/broadcast, then coverage is improved, but transmission reliability deteriorates
Solution Approach 1:
The patent applies dynamics by making the feedback mechanism adaptable to different coverage scenarios. The network device dynamically configures PUCCH resources and types based on terminal coverage conditions, allowing the system to switch between NACK-only feedback (for coverage extension) and ACK/NACK feedback (for reliability), thus resolving the contradiction between coverage area and transmission reliability
Solution Approach 2:
The patent changes the feedback parameter configuration based on coverage requirements. By configuring different PUCCH formats (short or long) and different feedback modes (NACK-only or ACK/NACK) according to terminal coverage conditions, the system optimizes the balance between coverage area and transmission reliability for different scenarios
2Reliability
If ACK and NACK feedback are both implemented, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by implementing different feedback mechanisms in different coverage areas. Terminals in good coverage conditions use ACK/NACK feedback for high reliability, while terminals in poor coverage conditions use only NACK feedback with extended PUCCH resources, thus achieving reliable transmission without universally increasing device complexity
Solution Approach 2:
The patent segments the feedback mechanism into different types (NACK-only and ACK/NACK) and different PUCCH formats (short and long). The network device configures appropriate segments based on terminal coverage conditions, reducing overall system complexity while maintaining reliability where needed
3Manufacturing precision
If PUCCH resources are configured for different coverage conditions, then transmission accuracy is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure multiple PUCCH resource sets with different formats and characteristics before transmission. Terminals select appropriate pre-configured resources based on their coverage conditions, improving transmission accuracy while reducing real-time resource allocation complexity
Solution Approach 2:
The patent creates universal PUCCH resource configurations that can serve multiple purposes. The same PUCCH resource set can be used by different terminals in similar coverage conditions, and the network device can reuse configuration patterns across multiple terminals, reducing overall resource allocation complexity while maintaining transmission accuracy
Data Source
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AI summary
The present application relates to the field of communications, and discloses a feedback information sending method and apparatus, and a device and a storage medium. The method comprises: 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. The method can be applied to an HARQ information feedback scenario where NACK exists under broadcast or multicast, such that a terminal in different coverage environments can effectively feed back NACK of an HARQ for the broadcast or multicast, and the accurate transmission performance of broadcast and multicast data is improved.