Assisted Distributed Gateway Selection for 5G Mobility
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Solution Overview
Problem
In the 5G mobile communications system, frequent changes in gateway locations due to user equipment (UE) movement lead to inefficient data paths and latency issues, as existing technologies are not designed to support optimal routing and low latency services, and current GW relocation mechanisms disrupt IP sessions.
Innovation Solution
Implementing a method for assisted distributed gateway selection, where the control plane network entity detects suboptimal network routes and decides on a new local gateway for the UE, using multi-homed PDU sessions and IPv6 connectivity to maintain seamless IP session continuity and optimize data paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If U-plane gateways are distributed locally to reduce latency, then network performance improves, but gateway relocation becomes necessary when UE moves causing IP session disruption
Solution Approach 1:
The patent segments the gateway functionality into multiple local U-plane gateways distributed across different network locations. Each gateway serves a specific geographic area, allowing UE to be served by the nearest gateway for optimal performance. When UE moves, only the user plane path needs to be relocated while the control plane session remains intact, enabling seamless handover between gateways.
Solution Approach 2:
The patent introduces a control plane gateway as an intermediary that maintains the IP session while user plane gateways are relocated. The control plane gateway acts as a stable anchor point that coordinates the relocation of user plane paths without disrupting the overall IP session, solving the contradiction between local optimization and session continuity.
2Stability of the object's composition
If UE is kept anchored at original gateway to maintain IP session continuity, then session stability improves, but data path becomes inefficient and latency increases
Solution Approach 1:
The patent implements a dynamic architecture where the user plane path can be flexibly relocated based on UE movement, while the control plane session remains stable. The system dynamically selects the optimal user plane gateway for each UE based on current location, allowing the data path to adapt to UE movement without disrupting the IP session.
Solution Approach 2:
The patent separates the control plane and user plane into independent dimensions. The control plane maintains the IP session in one dimension while the user plane operates independently in another dimension, allowing user plane gateway relocation without affecting session continuity. This dimensional separation enables simultaneous optimization of both session stability and data path efficiency.
3Ease of operation
If centralized gateway model is used to simplify mobility management, then session continuity improves, but data path efficiency and latency performance deteriorate
Solution Approach 1:
The patent segments gateway functions into centralized control plane responsibilities and distributed user plane responsibilities. The control plane gateway centrally manages sessions while multiple user plane gateways are distributed locally to provide efficient data paths. This segmentation allows simplified mobility management at the control plane while achieving low-latency performance through local user plane gateways.
Data Source
AI summary
There are provided measures for assisted distributed gateway selection. Such measures exemplarily comprise (as control plane network entity functionality in a mobile network scenario where an access of a terminal to a network is movable between at least two base stations and routable in parallel via at least one local gateway and a centralized gateway) detecting movement of said access of said terminal from a first base station to a second base station, determining that a first network route which is a current network route from said terminal via a first local gateway which is a current local gateway of said at least one local gateway provides less network performance than a second network route from said terminal via a second local gateway of said at least one local gateway based on a result of said detecting, and deciding said second local gateway as a target local gateway for said terminal based on a result of said determining.