PMIPv6 MAG restoration
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorZu Qiang
Life of this patent
Estimating the term…
Abstract
A mechanism to permit an LMA to perform some specific handling once MAG restart is detected is disclosed. If a MAG restart is detected by the LMA, the LMA preferably will not release all corresponding binding in its cache. The LMA may select an alternative MAG which is servicing the same. Then the LMA can send a mobility message to the selected MAG. The mobility message can be triggered by the restart detection or by the received downlink data on one or more valid binding. The mobility message can contains all UE identity that has a valid binding in the LMA and the restarted MAG.
Claims13
A method for handling failure of a first Mobility Access Gateway, the method carried out at a Local Mobility Anchor responsible for a User Equipment associated with the first Mobility Access Gateway, the method comprising:
- detecting a failure of the first Mobility Access Gateway;
- when receiving downlink data for the User Equipment, determining that the User Equipment is served by the first Mobility Access Gateway in failure condition;
- and
- transmitting a notification message towards a selected second Mobility Access Gateway including instructions to restore the User Equipment connections with the Local Mobility Anchor through the selected second Mobility Access Gateway.
A Local Mobility Anchor for handling failure of a first Mobility Access Gateway, the Local Mobility Anchor comprising:
- a User Equipment binding storage for storing a binding that associates a User Equipment with the first Mobility Access Gateway;
- a network interface for sending messages to and receiving messages from Mobility Access Gateways;
- and
- a re-attach engine for, detecting failure of the first Mobility Access Gateway and when receiving downlink data for the User Equipment, identifying the User Equipment is associated with the first Mobility Access Gateway through examination of the stored binding,
- determining that the first Mobility Access Gateway is failed, and, transmitting through the network interface towards a selected second Mobility Access Gateway a notification message instructing the selected second Mobility Access Gateway to restore the User Equipment connections with the Local Mobility Anchor.
Dependencies are inferred from the claim text.