Group Reference Signal Triggering for NR-U COT Efficiency
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Solution Overview
Problem
Current methods of reference signaling in contention-based wireless communication systems, such as those used in New Radio Unlicensed (NR-U), inefficiently utilize channel occupancy time (COT) leading to poor performance and failed transmissions.
Innovation Solution
Implementing a system where a group common control channel triggers the transmission of a reference signal from multiple user equipment (UEs), determining a set of time-frequency resources for transmission based on timing information, and transmitting the reference signal according to these resources, allowing for more efficient utilization of COT.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current reference signaling methods are used in contention-based systems, then device complexity is reduced, but channel occupancy time utilization efficiency deteriorates and transmission reliability worsens
Solution Approach 1:
The base station performs preliminary actions by determining time-frequency resources for reference signal transmission before the actual transmission occurs. The gNB configures and signals resource allocations to multiple UEs in advance, allowing them to transmit reference signals during acquired COT without collision. This preliminary resource assignment improves COT utilization efficiency and ensures reliable transmissions by preventing conflicts before they occur.
2Productivity
If current reference signaling methods are used, then device complexity is maintained at low levels, but resource management efficiency deteriorates leading to collisions
Solution Approach 1:
The patent merges resource management functions by having the base station centrally determine and allocate time-frequency resources for reference signal transmissions from multiple UEs. Instead of each UE independently selecting resources (which causes collisions), the gNB consolidates control and assigns resources efficiently. This merging approach improves resource management efficiency while the base station handles the complexity, keeping individual UE complexity low.
Data Source
AI summary
This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for group reference signal triggering for contention-based systems. The described techniques may enable a network node to trigger a group of one or more user equipments (UEs) to transmit a reference signal to the network node. The network node may transmit a group common control channel indicating timing information or configuration information corresponding to a set of resources for the transmission of the reference signal. The one or more UEs may transmit the reference signal according to the timing information or configuration information.