Joint SRS Transmission for Bundled 5G Asset Tracking Tags
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Solution Overview
Problem
Existing asset tracking systems in 5G NR face challenges with uplink transmission capabilities due to limited SRS reception by target gNBs, particularly in scenarios where devices are bundled together, leading to poor localization accuracy and increased failure rates.
Innovation Solution
Implementing joint SRS transmission among co-located devices, where a serving network node groups devices based on criteria such as common serving beam index, similar quality metrics, and propagation conditions, assigning a shared SRS sequence identifier and tailored transmit configuration to enhance SRS coverage and power boosting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If devices are bundled together for asset tracking, then device density increases, but SRS reception quality deteriorates and localization accuracy decreases
Solution Approach 1:
Multiple co-located devices are merged into a single group that transmits a joint SRS signal. The serving network node groups devices based on criteria such as common serving beam index, similar quality metrics, and propagation conditions. This merging allows the network to treat multiple devices as a single entity for positioning purposes, improving SRS reception quality and localization accuracy in dense device scenarios.
2Reliability
If joint SRS transmission is implemented among co-located devices, then SRS coverage and power boosting improve, but network node complexity increases
Solution Approach 1:
The system implements self-service mechanisms where the network node automatically determines device groups based on pre-defined criteria (common serving beam index, similar quality metrics, propagation conditions) without requiring manual configuration. The joint SRS transmission parameters are automatically configured and managed by the network, reducing operational complexity while improving positioning reliability.
3Adaptability or versatility
If devices transmit individual SRS signals, then device independence is maintained, but SRS reception capability deteriorates in challenging propagation conditions
Solution Approach 1:
Devices that are co-located and experience similar propagation conditions are merged into joint SRS transmission groups. This combining approach pools the transmission resources of multiple devices, providing power boosting and improved SRS reception capability in challenging propagation conditions, while devices that do not meet grouping criteria continue to transmit individual SRS signals, maintaining device independence where applicable.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for asset tracking joint sounding reference signal (SRS) transmission. A location management network node may send a positioning failure message to a serving network node. The serving network node may group devices if one or more criteria are met. When one or more of the devices can be grouped, the serving network node may assign and distribute, to devices, a multi-tag-SRS sequence identifier that may be used by the devices in the group. The serving network node may compute and send, to the devices in the group, a multi-tag-SRS transmit configuration. The devices may perform a joint SRS transmission. The location management network node may compute a location of a centroid for the group of devices associated with the reported metric.