HARQ Feedback Control for PDSCH Under MBS and NTN Conflicts
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Solution Overview
Problem
In communication systems combining non-terrestrial networks (NTN) and multimedia/broadcast multicast services (MBS), there is a conflict in Hybrid Automatic Repeat Request (HARQ) feedback configurations due to differing enabling/disabling configurations for group identifiers and HARQ processes, making it difficult for terminal devices to determine whether to enable HARQ feedback.
Innovation Solution
A method for wireless communication that involves receiving first indication information and second indication information, where the terminal device includes a first receiving unit and a first determining unit, which determines whether to transmit HARQ feedback information for the first PDSCH, which enables the terminal device to determine whether to transmit HARQ feedback information for the first PDSCH, which enables the terminal device to transmit HARQ information for the first PDSCH, which allows the network device to perform some or all operations of the method in the second aspect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback is configured for group identifiers in MBS, then multicast service reliability is improved, but conflict with unicast HARQ process configuration arises
Solution Approach 1:
The patent segments the HARQ feedback configuration into two independent dimensions: group identifier level (MBS) and HARQ process level (unicast/NTN). By receiving separate first indication information for group identifiers and second indication information for HARQ processes, the terminal can independently configure feedback for each dimension, resolving the conflict between MBS reliability requirements and unicast service needs.
Solution Approach 2:
The patent applies local quality by allowing different HARQ feedback configurations at different levels. The first indication information enables MBS-specific feedback configuration, while the second indication information allows per-HARQ-process control. This localized configuration approach lets the terminal device determine feedback based on specific service type and HARQ process characteristics.
2Productivity
If the terminal device uses a single HARQ process for both MBS and unicast services, then resource utilization is improved, but HARQ feedback configuration conflict occurs
Solution Approach 1:
The patent introduces dynamic determination of HARQ feedback status based on multiple indication informations. Instead of a static configuration, the terminal device dynamically evaluates both the group identifier indication (first indication information) and the HARQ process indication (second indication information) to determine feedback status, allowing flexible adaptation to different service types using the same HARQ process.
Solution Approach 2:
The patent uses the terminal device's determination mechanism as an intermediary that reconciles conflicting configurations. By processing both the first indication information (MBS level) and second indication information (process level), the terminal acts as a mediator that resolves the conflict and determines the appropriate feedback behavior for each specific case.
Data Source
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AI summary
A method for wireless communication, a terminal device, and a network device are provided in the present disclosure. The method includes the following. A terminal device receives first indication information and second indication information, where the terminal device includes a first group identifier and a first hybrid automatic repeat request (HARQ) process, the first indication information indicates whether HARQ feedback is enabled for the first group identifier, and the second indication information indicates whether HARQ feedback is enabled for the first HARQ process. The terminal device determines, according to the first indication information and/or the second indication information, whether to transmit HARQ feedback information for a first physical downlink shared channel (PDSCH), where the first PDSCH is associated with the first HARQ process. Based on the present disclosure, it may be determined which of the first indication information or the second indication information is used for determining whether to transmit the HARQ feedback information for the first PDSCH. Therefore, even in the case where a conflict occurs between a configuration indicated by the first indication information and a configuration indicated by the second indication information, HARQ feedback enabling/disabling for the first PDSCH can still be clearly determined.