Multicast-Unicast Feedback Configuration for Wireless UEs
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in managing feedback processes for multicast and unicast communications, particularly in determining whether a feedback process is configured for multicast-only or multicast-or-unicast scenarios, which affects the decoding and retransmission of data transmissions.
Innovation Solution
The system receives a feedback configuration from a base station indicating the type of feedback to be reported for each feedback process, allowing user equipment (UE) to determine if it has a multicast-only or multicast-or-unicast configuration, and accordingly decodes transmissions and monitors for retransmissions based on this configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate feedback processes are used for multicast and unicast communications, then reliability of feedback management is improved, but device complexity increases
Solution Approach 1:
The patent combines multicast and unicast feedback processes into a unified framework where a single feedback process can serve both communication types. The base station configures feedback processes that can be dynamically applied to either multicast or unicast transmissions, reducing the total number of separate feedback processes needed while maintaining reliable feedback management for both types of communications.
Solution Approach 2:
The feedback process is designed with multi-functionality to handle both multicast and unicast scenarios. The configuration parameters and feedback mechanisms are made universal so that the same feedback process infrastructure can support different communication types, thereby reducing device complexity while preserving reliability through consistent feedback handling.
2Device complexity
If shared feedback processes are used for both multicast and unicast communications, then device complexity is reduced, but measurement precision of feedback configuration deteriorates
Solution Approach 1:
While using shared feedback processes, the patent segments the configuration space by introducing specific indication parameters that clearly identify whether a given feedback process instance is intended for multicast or unicast communication. This segmentation within the shared framework maintains precision by providing unambiguous configuration indicators, even though the underlying feedback process structure is shared and simplified.
3Productivity
If multicast-only configuration is used for feedback processes, then productivity of multicast communication is improved, but adaptability to unicast scenarios is reduced
Solution Approach 1:
The patent implements dynamic configurability where feedback processes can be flexibly assigned to multicast or unicast communications based on current network conditions and requirements. The configuration is not static but can be dynamically adjusted, allowing the system to optimize multicast productivity when needed while maintaining the adaptability to switch to unicast modes, thereby resolving the contradiction between specialized optimization and general versatility.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described in which a user equipment (UE) may receive a feedback configuration for providing feedback for downlink communications from a base station. Based on the feedback configuration, the UE may determine whether one or more feedback processes has a multicast-only configuration for multicast data communications, or a multicast-or-unicast configuration for either multicast data communications or unicast data communications. The UE may decode one or more transmissions associated with the one or more feedback processes based on the multicast-only or multicast-or-unicast configuration, and may determine a feedback codebook based on the multicast-only or multicast-or-unicast configuration of the one or more feedback processes. The UE may monitor for retransmissions of one or more multicast data communications based on the feedback process configuration.