PIOT Inventory Positioning Using Network-Side Measurement
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Solution Overview
Problem
Passive Internet of Things (PIOT) tag terminals have weak signal processing capabilities, limiting their positioning capability and preventing the application of conventional positioning methods, especially for downlink positioning measurement.
Innovation Solution
A method where a core network device sends an inventory request to a first network device, including information to perform positioning measurement on a first apparatus during or after an inventory process, reusing existing signaling to reduce overheads and improve positioning precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional positioning methods are applied to PIOT tag terminals, then positioning capability is improved, but the weak signal processing capability of the tag terminal prevents implementation
Solution Approach 1:
The patent inverts the conventional positioning approach by having the network device perform downlink positioning measurement instead of the tag terminal performing uplink measurement. The network device sends positioning reference signals to the tag terminal and measures the reflected signals, thereby overcoming the tag terminal's weak signal processing capability while achieving accurate positioning.
Solution Approach 2:
The patent introduces a positioning reference signal as an intermediary element. The network device sends positioning reference signals that are reflected by the tag terminal, and the network device measures these reflected signals. This intermediary signal enables positioning measurement without requiring the tag terminal to have complex signal processing capabilities.
2Measurement precision
If positioning measurement is performed separately from inventory process, then positioning accuracy is improved, but signaling overheads increase
Solution Approach 1:
The patent merges the positioning measurement process with the inventory process by integrating positioning reference signal transmission into the existing inventory signaling framework. The positioning measurement is performed during or after the inventory process using the same communication channel, thereby reducing signaling overheads while maintaining positioning accuracy.
Solution Approach 2:
The patent makes the inventory signaling multi-functional by enabling it to serve both inventory purposes and positioning measurement purposes. The positioning reference signals are transmitted using the existing inventory communication infrastructure, allowing the same signaling mechanism to fulfill multiple functions and reduce overall signaling overhead.
Data Source
AI summary
A positioning measurement method, an inventory method, and a related apparatus, so that a first network device performs positioning measurement on a first apparatus during or after an inventory process of the first apparatus, thereby meeting a positioning requirement during or after the inventory process. The method includes: a core network device sends an inventory request to the first network device, where the inventory request is used to request inventory of the first apparatus, the inventory request includes first information, and the first information indicates the first network device to perform positioning measurement on the first apparatus. Correspondingly, the first network device receives the inventory request from the core network device; and the first network device performs positioning measurement on the first apparatus during or after the inventory process of the first apparatus.