5G Location Management Function Selection for Low Latency
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Solution Overview
Problem
The existing 5G positioning network architecture faces increased overall delay requirements due to inefficient information transmission processes in location management, which hinder high-precision and low-latency positioning services.
Innovation Solution
A selection method for a location management function entity that receives a positioning request message from a gateway mobile location center, obtains information about the target UE's wireless access network, and selects a suitable local location management function entity based on the network information, QoS requirements, and pre-stored data to optimize positioning service delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the location management function entity is located in the 5G core network with the existing information transmission process (AMF→LMF→AMF→RAN→UE and reverse), then the positioning service can be completed using standard protocols, but the overall delay requirement of the location service increases due to transmission delay and processing delay
Solution Approach 1:
The patent segments the location management function into two parts: a centralized LMF in the core network for complex positioning calculations and a distributed LLMF in the access network for local measurement collection and preliminary processing. This segmentation allows positioning tasks to be divided into local and remote components, reducing the need for repeated message exchanges between core network entities and thereby reducing overall delay while maintaining service reliability
Solution Approach 2:
The LLMF in the access network performs preliminary positioning measurements and data processing locally before transmitting results to the core network LMF. This preliminary action eliminates the need for the core network LMF to directly communicate with the RAN for measurement collection, reducing transmission delays and allowing the core network to focus on higher-level positioning calculations
Data Source
AI summary
The present disclosure provides a selection method, a selection device, a management function entity, an access network node, a GMLC and a NRF. The selection method of a location management function entity includes: receiving a positioning request message sent by a GMLC; the positioning request message including an identifier of a target UE and a positioning QOS requirement; obtaining information of a wireless access network where the target UE is located; selecting a target LLMF entity according to the information of the wireless access network where the target UE is located, the positioning QOS requirement, and pre-stored related information of the LLMF entity.