Acknowledgment Feedback Configuration for Group-Common Downlink Channels
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in managing acknowledgment feedback for group-common downlink channels, particularly in semi-persistent scheduling scenarios, where separate resources for unicast and group-common channels are often required, leading to complex configurations and potential collisions.
Innovation Solution
The implementation of an acknowledgment feedback configuration that allows for either separate or common resources for transmitting feedback for unicast and group-common semi-persistent downlink shared channels, enabling multiplexing of feedback and optimizing resource utilization through dynamic determination of uplink control channel resources and HARQ process IDs based on payload size and scheduling parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate resources are allocated for unicast and group-common downlink channels, then feedback transmission can be performed independently for each channel type, but resource configuration complexity increases and resource utilization efficiency decreases
Solution Approach 1:
The patent combines separate feedback resources for unicast and group-common channels into a unified feedback resource structure. The base station configures a single set of feedback resources that can accommodate both unicast PDSCH and group-common PDSCH acknowledgments, eliminating the need for separate resource configurations and reducing overall system complexity while maintaining independent feedback capabilities.
Solution Approach 2:
The feedback resource configuration is designed to serve multiple functions simultaneously. The same feedback resources can be used for both unicast channel acknowledgments and group-common channel acknowledgments, making the resource allocation universal and adaptable to different channel types without requiring dedicated resources for each, thereby improving resource utilization efficiency.
2Reliability
If separate resources are allocated for unicast and group-common downlink channels, then feedback collisions are avoided, but resource utilization efficiency decreases
Solution Approach 1:
The patent implements dynamic feedback resource allocation where the same feedback resources are dynamically assigned to different channel types based on actual transmission needs. The base station determines whether to allocate feedback resources for unicast or group-common channels on a per-transmission basis, allowing flexible adaptation that prevents collisions while maximizing resource utilization by avoiding idle dedicated resources.
Solution Approach 2:
The system changes the allocation parameters of feedback resources dynamically. Instead of fixed separate allocations, the feedback resource assignment parameters (such as time-frequency resources and resource indicators) are adjusted based on the type of downlink transmission, enabling the same physical resources to serve different purposes at different times without causing collisions.
3Productivity
If common resources are used for both unicast and group-common channels, then resource utilization efficiency improves, but feedback collision risk increases
Solution Approach 1:
The base station performs preliminary determination of feedback resource allocation before actual feedback transmission. By pre-configuring and pre-assigning feedback resources based on the scheduled downlink transmissions, the system proactively prevents resource conflicts before they occur, allowing common resources to be shared safely between unicast and group-common channels without increasing collision risk.
Solution Approach 2:
The system implements a feedback mechanism where the base station monitors downlink transmission schedules and adjusts feedback resource allocation accordingly. Based on feedback information about actual transmission patterns and resource usage, the base station optimizes the sharing of common feedback resources between different channel types, dynamically preventing collisions while maintaining high utilization efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an acknowledgment feedback configuration for providing feedback for semi-persistent scheduling (SPS) downlink shared channels (e.g., SPS group-common physical downlink shared channels (PDSCHs), SPS unicast PDSCHs, etc.). For example, the acknowledgment feedback configuration may include separate resources for transmitting acknowledgment feedback for unicast downlink shared channels and for transmitting acknowledgment feedback for group-common downlink shared channels or may include common resources for transmitting acknowledgment feedback for both unicast downlink shared channels and group-common downlink shared channels. In some examples, the UE may multiplex acknowledgment feedback for a set of group-common downlink shared channels with additional acknowledgment feedback for other downlink channels.