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

Claim 0:
1. A system comprising:
a proxy call session control function (P-CSCF) node;
a first network node, and
a second network node,
wherein the P-CSCF node is configured to:
determine that a dedicated bearer associated with a communication session has failed by:
sending a request to the second network node; and
at least one of:
receiving an error code from the second network node; or
failing to receive a response from the second network node within a predetermined time period since the sending of the request to the second network node;
send 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
send an instruction to the first network node to dissociate the dedicated bearer from the communication session.