5G LAN VLAN Broadcast Isolation via Virtual Ports
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Solution Overview
Problem
In 5G LAN technology, existing methods fail to accurately broadcast Ethernet broadcast frames and implement service isolation, leading to incorrect delivery of frames to unintended user groups, compromising service isolation within large-scale LANs.
Innovation Solution
A communication method that involves determining a virtual local area network (VLAN) identifier for a user group through a session management function entity and a virtual local area network management function entity, allowing the user plane function entity to allocate virtual ports and broadcast Ethernet broadcast frames within the identified VLAN, ensuring precise service isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Ethernet broadcast frames are broadcast using existing methods in 5G LAN, then broadcast coverage is achieved, but service isolation is compromised and frames are delivered to unintended user groups
Solution Approach 1:
The patent segments the LAN into multiple VLANs (Virtual Local Area Networks) to isolate broadcast frames within specific user groups. Each VLAN acts as a separate broadcast domain, preventing broadcast frames from one user group from reaching other user groups, thus maintaining service isolation while enabling controlled broadcast delivery.
Solution Approach 2:
The patent introduces a VLAN identifier as an intermediary mechanism between the broadcast frame and the destination user group. This VLAN identifier acts as a mediator that ensures broadcast frames are delivered only to the intended user group, preventing incorrect delivery to unintended groups while maintaining reliable service isolation.
2Reliability
If VLAN technology is used to divide LAN into user groups, then service isolation is improved, but device complexity increases
Solution Approach 1:
The patent implements VLAN functionality within the existing 5G core network infrastructure, allowing network elements to perform multiple functions including both 5G mobility management and VLAN-based service isolation. This multi-functionality approach enables service isolation without requiring entirely separate dedicated VLAN management devices, thereby limiting the increase in device complexity.
3Productivity
If broadcast frames are replicated and distributed to all connections, then broadcast coverage is achieved, but service isolation is lost and frames reach incorrect user groups
Solution Approach 1:
The patent applies local quality by assigning specific VLAN identifiers to different user groups and their corresponding network connections. This allows broadcast frames to be replicated and distributed efficiently to maintain coverage, while each connection's local VLAN identifier ensures the frame is delivered only to the appropriate user group, preventing isolation loss.
Data Source
AI summary
In a communication method, when a terminal device initiates establishment of a session of an Ethernet type, a virtual local area network management function entity in a communications system may determine a virtual local area network identifier of a user group to which the terminal device belongs. In this way, a user plane function entity in the session of the terminal device may allocate a plurality of virtual ports to a virtual local area network whose identifier is the virtual local area network identifier and may broadcast the Ethernet broadcast frame on the plurality of virtual ports.