SMF Handover Management for 5G URLLC Resource Security
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the 5G communication system, ensuring that Ultra-Reliable and Low Latency Communication (URLLC) services are uninterrupted and maintain the same quality during handovers, as existing methods fail to secure the necessary resources in the target radio access network (T-RAN) efficiently.
Innovation Solution
A handover management method is implemented by the Session Management Function (SMF), which receives handover information, obtains resource information from the source radio access network (S-RAN), and requests the User Plane Function (UPF) to secure resources in the T-RAN, ensuring seamless continuation of URLLC services by either allocating or reallocating resources as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If handover is performed for user equipment in 5G communication system, then mobility and network flexibility are improved, but service quality and reliability may deteriorate due to resource allocation issues in target network
Solution Approach 1:
The SMF obtains resource information from the source RAN before the handover is completed and proactively requests resource allocation in the target RAN. This preliminary action ensures that resources are ready in advance, preventing service quality deterioration during the handover process.
Solution Approach 2:
The SMF receives handover information from the AMF and uses this feedback to trigger resource allocation requests to the UPF. The feedback mechanism ensures that resource allocation is synchronized with the handover process, maintaining service reliability.
2Device complexity
If resources are allocated in target radio access network after handover completion, then device complexity is reduced, but service interruption and latency increase
Solution Approach 1:
Resource allocation requests are sent to the UPF before or at the moment of handover completion, ensuring resources are ready in advance. This eliminates service interruption time while maintaining manageable complexity through automated SMF coordination.
3Manufacturing precision
If resource information is obtained from source radio access network, then resource allocation accuracy is improved, but information transmission complexity increases
Solution Approach 1:
The SMF acts as an intermediary that receives handover information from the AMF and uses it to request resource allocation from the UPF. This intermediary role simplifies information transmission by centralizing coordination, while maintaining accurate resource allocation through structured information exchange.
Data Source
AI summary
In accordance with an aspect of the present disclosure, there is provided a handover management method performed by a session management function (SMF). The method comprises, receiving handover information related to a user equipment (UE) receiving a predetermined service by accessing a source radio access network (S-RAN), obtaining, after receiving the handover information, resource information on a resource used when the predetermined service is provided to the UE at the S-RAN, and transmitting, to a user plane function (UPF), a request that a resource corresponding to the obtained resource information is to be secured in a target radio access network (T-RAN).