Batch-Based Feedback Codebook Construction in New Radio
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Solution Overview
Problem
Existing wireless communication systems, particularly in New Radio (NR) networks, face inefficiencies in acknowledging batched downlink transmissions, leading to unreliable feedback mechanisms that do not effectively handle grouped data packets, which is crucial for high-throughput and low-latency applications like XR communications.
Innovation Solution
Implementing batch-based feedback mechanisms where user equipment (UE) constructs a codebook based on assignment information, such as batch assignment indexes, to transmit acknowledgment feedback for grouped downlink transmissions, enhancing reliability and efficiency in acknowledging data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional per-packet acknowledgment feedback is used for downlink transmissions, then individual packet reliability can be tracked, but feedback overhead and processing complexity increase significantly for batched transmissions
Solution Approach 1:
The patent combines multiple individual packet acknowledgments into a single batch-level acknowledgment. The UE groups downlink transmissions into batches and provides one consolidated ACK/NACK feedback for the entire batch, merging multiple feedback signals into one to reduce overhead and complexity while maintaining reliability through batch-level error detection.
Solution Approach 2:
The patent segments the feedback mechanism by introducing batch assignment indexes that divide the downlink transmissions into distinct batches. Each batch is independently tracked using segmentation identifiers (counter and total values), allowing the system to manage feedback complexity through structured segmentation of the transmission stream into manageable batches.
2Productivity
If batch-based feedback is implemented to reduce overhead, then feedback efficiency improves, but tracking and identifying individual batch transmissions becomes more difficult
Solution Approach 1:
The patent implements a feedback mechanism where the base station provides batch assignment information (counter and total values) in downlink control information, and the UE returns acknowledgments based on this information. This feedback loop ensures that both sides maintain synchronized understanding of batch identities and statuses, making tracking manageable despite batch-based aggregation.
Solution Approach 2:
The patent introduces batch assignment indexes (counter value and total value) as intermediary identifiers that mediate between individual packets and batch-level feedback. These intermediary identifiers enable efficient batch tracking by providing a simplified reference system that bridges the gap between detailed packet-level information and aggregated batch-level acknowledgments.
3Measurement precision
If assignment information is provided for each downlink transmission to enable batch tracking, then batch identification accuracy improves, but downlink control information overhead increases
Solution Approach 1:
The patent applies partial action by providing batch assignment information (counter and total values) only when batch-based feedback is configured and needed, rather than for every single downlink transmission. This selective provision of information maintains accurate batch identification where required while avoiding unnecessary overhead in scenarios where batch tracking is not applicable.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. According to one or more aspects, a device, such as a user equipment (UE), may receive downlink control information, and may determine assignment information for processing batch-based feedback based on the downlink control information. The UE may determine the batch-based feedback for a batch of downlink transmissions (for example, transmissions associated with packets of information) that are configured to be processed together by the UE. The UE may receive a downlink transmission from the base station, and may construct a codebook based on assignment information and the downlink transmission. In some examples, the UE may determine acknowledgment feedback for the downlink transmission based on the codebook. The UE may transmit the acknowledgment feedback to the base station.