System and method for session resiliancy at geo-redundant gateways
AssigneeAlcatel Lucent
InventorsVACHASPATI P. KOMPELLA, SATYAM SINHA, SATHYENDER NELAKONDA, PRAVEEN VASANT MULEY
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Abstract
A method, system and apparatus for managing a backup service gateway (SGW) associated with a primary SGW, the backup SGW periodically receiving from the primary SGW at least a portion of corresponding UE session state information and in response to a failure of the primary SGW, assuming management of IP addresses and paths associated with the primary SGW, and in response to receiving control or data plane traffic associated with a UE, generating a Downlink Data Notification (DDN) message adapted to inform an MME that the UE is in a live state.
Claims20
A method for managing a backup service gateway (SGW) associated with a primary SGW, the method comprising:
- in a slave mode of operation, periodically receiving from the primary SGW at least a portion of corresponding UE session state information;
- and
- in response to a failure of the primary SGW, entering a master mode of operation, said master mode of operation comprising:
- assuming management of IP addresses and paths associated with said primary SGW;
- and
- in response to receiving control or data plane traffic associated with a UE, generating a Downlink Data Notification (DDN) message adapted to inform an MME that the UE is in a live state.
An apparatus for use in a service gateway (SGW) adapted to backup a primary SGW, the apparatus comprising:
- a processor configured for managing the backup SGW, the processor causing the backup SGW to operate in one of a slave mode of operation and a master mode of operation;
- said backup SGW, in said slave mode of operation, periodically receiving from the primary SGW at least a portion of corresponding UE session state information and, in response to a failure of the primary SGW, entering a master mode of operation;
- said backup SGW, in said master mode of operation, assuming management of IP addresses and paths associated with said primary SGW and, in response to receiving control or data plane traffic associated with a UE, generating a Downlink Data Notification (DDN) message adapted to cause inform an MME that the UE is in a live state.
A computer readable medium including software instructions which, when executed by a processer, perform a method for managing a backup service gateway (SGW) associated with a primary SGW, the method comprising:
- in a slave mode of operation, periodically receiving from the primary SGW at least a portion of corresponding UE session state information;
- and
- in response to a failure of the primary SGW, entering a master mode of operation, said master mode of operation comprising:
- assuming management of IP addresses and paths associated with said primary SGW;
- and
- in response to receiving control or data plane traffic associated with a UE, generating a Downlink Data Notification (DDN) message adapted to cause inform an MME that the UE is in a live state.
A computer program product, wherein a computer is operative to process software instructions which adapt the operation of the computer such that computer performs a method for managing a backup service gateway (SGW) associated with a primary SGW, the method comprising:
- in a slave mode of operation, periodically receiving from the primary SGW at least a portion of corresponding UE session state information;
- and
- in response to a failure of the primary SGW, entering a master mode of operation, said master mode of operation comprising:
- assuming management of IP addresses and paths associated with said primary SGW;
- and
- in response to receiving control or data plane traffic associated with a UE, generating a Downlink Data Notification (DDN) message adapted to cause inform an MME that the UE is in a live state.
Dependencies are inferred from the claim text.