VM Migration via TSI ID in 5G-LAN WTRUs
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Solution Overview
Problem
Existing 5G tenant systems face challenges in managing dynamic IP/MAC addresses and communication effectively within 5G-LANs, particularly during virtual machine (VM) migration between wireless transmit/receive units (WTRUs).
Innovation Solution
The method involves a WTRU receiving a migrated VM with an associated tenant system interface (TSI) ID, sending a PDU session request message to the session management function (SMF) of the 5G-LAN, and establishing a PDU session to facilitate seamless VM migration between WTRUs via both 5G-LAN and datacenter virtual networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a VM is migrated between WTRUs in a 5G-LAN, then the mobility and flexibility of the tenant system is improved, but the management of IP/MAC addresses and communication sessions becomes more complex
Solution Approach 1:
The patent applies preliminary action by establishing a PDU session and allocating IP/MAC addresses to the VM before the actual migration occurs. The TSI ID is pre-configured and associated with the VM's network interface, so when migration happens, the address management is already prepared and can be seamlessly transferred to the new WTRU, reducing the complexity of address management during migration.
Solution Approach 2:
The patent introduces a Tenant System Interface (TSI) ID as an intermediary element that mediates between the VM and the network. This TSI ID serves as a stable identifier that remains associated with the VM across migrations, allowing the network to track and manage IP/MAC addresses without directly dealing with the complexity of VM movement between different WTRUs.
2Adaptability or versatility
If dynamic IP/MAC address management is implemented in 5G-LANs, then the flexibility of communication is improved, but the reliability of address assignment during VM migration may deteriorate
Solution Approach 1:
The patent ensures reliable address assignment by performing preliminary actions: the IP/MAC addresses are allocated and the PDU session is established before VM migration. The TSI ID is pre-bound to the network interface, creating a reliable mapping that persists through migration, thus maintaining address assignment reliability while enabling dynamic communication flexibility.
Solution Approach 2:
The patent implements feedback mechanisms where the network function receives the TSI ID from the migrating WTRU, looks up the associated IP/MAC address information, and uses this feedback to correctly assign addresses and establish sessions for the VM in its new location, ensuring reliable address assignment despite dynamic migration.
3Reliability
If PDU session establishment is performed during VM migration, then the communication continuity is improved, but the migration time and processing delay increase
Solution Approach 1:
The patent applies preliminary action by establishing the PDU session and allocating communication resources before the VM migration is completed. This allows the network to have the session ready in advance, so when the VM arrives at the new WTRU, the communication path is already prepared, minimizing migration time while ensuring continuity.
Solution Approach 2:
The patent enables skipping of delays by performing PDU session establishment and address allocation in advance during the migration process, rather than waiting until after migration is complete. This rushing through of network setup operations during migration reduces the overall time loss while maintaining communication continuity.
Data Source
AI summary
A method of supporting VM migration between a first WTRU and a second WTRU via a 5GLAN is disclosed. The first WTRU is a host of a VM and the second WTRU connects to the 5GLAN. The method comprises that the second WTRU receives the VM migrated from the first WTRU, wherein a tenant system interface (TSI) ID is associated with the VM; sends a PDU session request message to a session management function (SMF) of the 5GLAN, the PDU session request message comprising the TSI ID; and sneds a PDU session response message from the SMF so as to establish a PDU session between the second WTRU and the 5GLAN.