Method of registering a mobile terminal in a mobile communication network

A method for registering a mobile terminal in a mobile communication network via a base station, an access link between the base station and the core of the network being switched from a normal operating mode to a degraded operating mode, the method, implemented by a proxy mobility management entity, comprising:

• receiving, from a local mobility management entity, a request for security information, said request comprising an identifier of the mobile terminal,
• sending an authentication request to a subscriber server of the network, said request comprising the identifier of the mobile terminal,
• receiving from the subscriber server of an authentication response, said response comprising security information specific to the mobile terminal,
• sending, to the local mobility management entity, a response to the request for security information, said response comprising the security information received.

A local mobility management entity of a mobile communication network, comprising:

• a processor;
• and
• a non-transitory computer-readable medium comprising instructions stored thereon, which when executed by the processor configure the local mobility management entity to perform acts comprising:
• receiving, from a mobile terminal, a network attachment request, said attachment request comprising an identifier of the mobile terminal,
• sending, to a proxy mobility management entity, a request for security information specific to the mobile terminal, said request comprising the identifier of the mobile terminal,
• receiving, from the proxy mobility management entity a response to the request for security information, said response comprising security information specific to said mobile terminal, said security information originating from a subscriber server of the network, and
• authenticating the terminal by using the security information received.

A proxy mobility management entity of a mobile communication network, comprising:

• a processor;
• and
• a non-transitory computer-readable medium comprising instructions stored thereon, which when executed by the processor configure the proxy mobility management entity to perform acts comprising:
• receiving, from a local mobility management entity, a request for security information, said request comprising an identifier of the mobile terminal,
• sending, to a subscriber server, an authentication request, said request comprising the identifier of the mobile terminal,
• receiving a response to the authentication request, said response comprising security information specific to the mobile terminal,
• sending, to the local mobility management entity, a response to the request for security information, said response comprising the security information specific to the mobile terminal.

A non-transitory computer-readable data medium in which is stored a computer program comprising code portions for execution of a method for registering a mobile terminal in a mobile communication network via a base station, when the program is run on a processor of a local mobility management entity, an access link between the base station and the core of the network being switched from a normal operating mode to a degraded operating mode, the method comprising:

• receiving an attachment request, retransmitted by the base station and originating from the mobile terminal, said request comprising an identifier of the mobile terminal,
• sending, to a proxy mobility management entity, a request for security information specific to the mobile terminal, said request comprising the identifier of the mobile terminal,
• receiving a response to the request for security information, said response comprising security information specific to said mobile terminal, said security information originating from a subscriber server of the network,
• authenticating said terminal by using the security information received.

A non-transitory computer-readable data medium in which is stored a computer program comprising code portions for execution of a method for registering a mobile terminal in a mobile communication network via a base station, when the program is run on a processor of a proxy mobility management entity, an access link between the base station and the core of the network being switched from a normal operating mode to a degraded operating mode, the method comprising

• receiving, from a local mobility management entity, a request for security information, said request comprising an identifier of the mobile terminal,
• sending an authentication request to a subscriber server of the network, said request comprising the identifier of the mobile terminal,
• receiving from the subscriber server of an authentication response, said response comprising security information specific to the mobile terminal,
• sending, to the local mobility management entity, a response to the request for security information, said response comprising the security information received.