Feedback Resource Multiplexing for Low Latency
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Solution Overview
Problem
Current feedback mechanisms in new radio (NR) Rel-15 do not meet latency requirements for services sensitive to transmission latency, as they do not effectively multiplex feedback information across downlink transmissions.
Innovation Solution
A method for multiplexing feedback information on a feedback resource is introduced, where the granularity for multiplexing is determined to represent a time domain range within a multiplexing window, allowing for the transmission of feedback from multiple downlink transmissions on the same feedback resource, with options including a slot, partial of a slot, or N symbols, where N is an integer greater than or equal to 1.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If feedback information is transmitted using the current NR Rel-15 mechanism with fixed slot-based timing, then the system maintains simplicity in feedback scheduling, but the transmission latency cannot meet the requirements of latency-sensitive services
Solution Approach 1:
The feedback transmission resource is segmented into multiple granularities (slot, partial slot, N symbols) allowing flexible selection of time domain ranges. This segmentation enables the system to choose finer granularity for low-latency services while maintaining coarser granularity for other services, thus reducing feedback latency without uniformly increasing system complexity
Solution Approach 2:
The feedback timing mechanism is made dynamic by allowing the granularity of multiplexing window to be adjusted based on service requirements. The system can dynamically select between slot-based, partial-slot, or symbol-based feedback windows, enabling adaptive latency optimization for different service types while maintaining operational simplicity through standardized procedures
2Productivity
If feedback information from multiple downlink transmissions is multiplexed on the same feedback resource, then resource utilization improves, but the time domain range for multiplexing becomes more complex to manage
Solution Approach 1:
The multiplexing window is defined by configurable parameters (granularity type and time domain range) that can be adjusted to balance resource utilization and management complexity. By changing these parameters based on traffic patterns and service requirements, the system achieves high resource utilization while keeping management complexity controllable through parameterized configurations
Data Source
AI summary
Disclosed in the present disclosure are a method for multiplexing on a feedback resource, a terminal device, a network device, a chip, a computer readable storage medium, a computer program product and a computer program, the method comprising: determining a granularity for multiplexing feedback information; the granularity for multiplexing being used for characterizing the time domain range of a multiplexing window for multiplexing the feedback information, and being used for multiplexing the feedback information of at least two downlink transmissions on the same feedback resource in the multiplexing window; and the time domain range being one of the following: a complete time slot, a non-complete time slot, or N symbols, N being an integer greater than or equal to 1.