Access Type Selection for 5G UE Positioning
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Solution Overview
Problem
In 5G systems, when UE accesses the core network through both 3GPP and non-3GPP access types simultaneously, existing technologies fail to select the appropriate access type for transmitting UE positioning information effectively, especially when the AMFs serving the UE are different for each access type, leading to an inability to realize positioning services.
Innovation Solution
The proposed method involves a Unified Data Manager (UDM) and a Gateway Mobile Location Centre (GMLC) determining the appropriate access type for transmitting UE positioning information by acquiring information about all access types, AMFs, and status information, and then sending the access type to the GMLC, which can include sending the address of the relevant AMF or LMF to facilitate positioning services, regardless of whether the AMFs are the same or different for each access type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE accesses the core network through both 3GPP and non-3GPP access types simultaneously, then the UE can establish multiple access paths to the network, but the system cannot determine which access type to use for transmitting positioning information when AMFs are different for each access type
Solution Approach 1:
The patent introduces the UDM (Unified Data Management) as an intermediary component that receives positioning requests from GMLC, determines the appropriate access type based on stored UE context information, and returns the selected access type to GMLC. This intermediary resolves the contradiction by centralizing the decision-making process for access type selection, ensuring reliable positioning service delivery while maintaining adaptability to multiple access types.
Solution Approach 2:
The UDM performs preliminary actions by storing UE context information including access type information during the UE's network access establishment phase. This pre-stored information is later retrieved when positioning requests arrive, enabling rapid and reliable determination of the appropriate access type without delaying the positioning service delivery.
2Measurement precision
If the system stores and processes information about all access types and AMFs, then the access type selection becomes more accurate, but the system complexity increases
Solution Approach 1:
The UDM is designed as a universal component that handles multiple functions: storing UE context information, managing access type information, retrieving relevant data, and determining appropriate access types. By consolidating these functions in a single multi-functional entity, the system achieves accurate access type determination without proportionally increasing overall system complexity.
Solution Approach 2:
The UDM autonomously determines the appropriate access type by self-service mechanisms: it retrieves stored UE context information, applies predetermined determination rules, and independently makes the access type selection without requiring external intervention or complex coordination with other network elements, thereby simplifying the information management process.
Data Source
AI summary
The present application relates to the field of communications. Disclosed are an access type selection method and device and a storage medium, for solving the problem in the prior art that the location service for a UE cannot be implemented under an access of a 3GPP access type and a non-3GPP access type when AMFs servicing the UE are different. The method comprises: a gateway mobile location center (GMLC) receives a second request sent from a location service (LCS) client; and the GMLC determines an access type for transmitting location information.