Session Management Network Element Local Application Server Switching
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Solution Overview
Problem
In mobile edge computing, when a terminal device undergoes a handover between user plane network elements, it faces challenges in maintaining reliable and low-latency service access to a local application server, as the existing systems fail to efficiently switch the application server, leading to suboptimal service quality.
Innovation Solution
A method is introduced where a session management network element identifies and sends the address of a local application server to the terminal device after a handover, ensuring the terminal device can access an application server with the highest priority or topologically closest server, thereby maintaining reliable and low-latency service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device continues to access the original application server after handover, then service continuity is maintained, but service reliability and latency are degraded
Solution Approach 1:
The patent implements dynamic application server selection based on terminal device location. The session management network element dynamically determines the most appropriate application server after handover by considering the terminal's current position relative to available servers, rather than statically maintaining connection to the original server. This dynamic adjustment ensures optimal service quality while maintaining continuity.
Solution Approach 2:
The system employs feedback mechanisms where the session management network element receives information about terminal device handover and current location, processes this information to identify the optimal application server, and updates the terminal's service connection accordingly. This closed-loop feedback ensures the terminal always connects to the most suitable server for current conditions.
2Reliability
If the system implements application server switching after handover, then service quality is improved, but system complexity increases
Solution Approach 1:
The session management network element serves as an intermediary between the terminal device and application servers. It handles the complex logic of determining optimal server selection based on handover events and terminal location, while presenting a simplified interface to the terminal device. This intermediary approach centralizes complexity in a dedicated network element rather than distributing it across multiple components.
Solution Approach 2:
The session management network element performs multiple functions: it manages handover procedures, determines optimal application server selection, and maintains service continuity. By consolidating these diverse functions in a single network element, the system avoids the complexity that would arise from separate specialized components for each function.
3Adaptability or versatility
If the terminal device accesses a remote application server after handover, then service coverage is maintained, but service latency increases
Solution Approach 1:
The patent implements local quality optimization by selecting application servers based on their geographical proximity to the terminal device's current location after handover. The session management network element identifies and connects the terminal to locally deployed application servers rather than remote ones, ensuring that service quality is optimized for the specific local context where the terminal is currently operating.
Data Source
AI summary
An application server switching method, applied to a scenario in which a handover occurs between user plane network elements corresponding to a terminal device, includes obtaining, based on a user plane network element of the user plane network elements after the handover and a correspondence between the user plane network element and an address of a local application server of one or more application servers deployed on a network, the address of the local application server corresponding to the user plane network element after the handover. The correspondence between the user plane network element and the address of the local application server is used to indicate the address of the local application server. The method also includes sending the address of the local application server corresponding to the user plane network element after the handover.