Patent ID: 11930425
Assignee: T-MOBILE USA, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A method comprising:
determining, by a proxy call session control function (P-CSCF) node, that a dedicated bearer associated with a communication session has failed by:
sending a request to a first network node; and
at least one of:
receiving an error code from the first network node; or
failing to receive a response from the first network node within a predetermined time period since the sending of the request to the first network node;

sending, by the P-CSCF node, a Session Initiation Protocol (SIP) message to a user equipment (UE) associated with the communication session, the SIP message causing the UE to refrain from sending SIP requests using a SIP INVITE method; and
sending, by the P-CSCF node, an instruction to a second network node to dissociate the dedicated bearer from the communication session.