Patent ID: 11968618
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method of detecting, at a mobility node in a communications network, a state where a mobile terminal is incapable of replying to a message, the method comprising:
receiving a create bearer request from a gateway node for a subsequent establishment of a bearer with the mobile terminal;
determining that the mobile terminal is non-reachable due to being in a long Discontinuous Reception and Transmission, DRX cycle or being in a power saving state; sending a Create Bearer response to the gateway node indicating that the mobile terminal is in the long DRX cycle or in the power saving state and not yet capable of replying to the message;
receiving a service request from the mobile terminal as a control plane signal; sending, in response to the service request, a modify bearer request to the gateway node which modify bearer request comprises an indication indicating that the mobile terminal is now reachable and capable of responding to a message for establishing a bearer;
storing the response at the mobility node; and
forwarding the stored response to another serving mobility node when the mobile terminal changes to said another serving mobility node.