Node and method for the handling of serving gateway partial failure

摘要

Example embodiments presented herein are directed towards improved handling during Serving Gateway (SGW) partial failures. Some of the example embodiments are directed towards a Mobility Management Entity (MME) configured to alter a S4 Serving General Packet Radio Service Support Node (S4-SGSN) that a SGW partial failure has occurred. Some of the example embodiments are directed towards a Packet Data Network Gateway (PGW) being informed that ISR for a user equipment is activated, this the PGW will save any MME related identification information for a user equipment undergoing a mobility procedure when ISR is activated.

主权项

1. A method, in a Mobility Management entity (MME) node, for partial failure handing when an Idle Mode Signalling Reduction (ISR) is activated, the MME node being comprised in a communications network, the method comprising:
the MME receiving, from a Serving Gateway (SGW) node, a notification of a partial failure within the SGW node, the notification comprising an identification of at least one user equipment associated with a set of Packet Domain Network (PDN) connections affected by the partial failure; the MME processing bearers associated with the affected set of PDN connections; and the MME sending to a S4-Serving General Packet Radio Service Support Node (S4-SGSN) a failure notification message indicating that the SGW node has a partial failure, the failure notification message comprising the identification of the at least one user equipment associated with the affected set of PDN connections.