| 摘要 |
<p>A user equipment (UE) and method is provided having one or more components configured to receive a non-session initiation protocol (SIP) notification from a SIP entity and in response to send a ping request to the SIP entity, the one or more components further configured to receive a SIP request from the SIP entity. A network component and method is also provided that include one or more components configured to send a non-session initiation protocol (SIP) notification to a user equipment (UE) and to receive a ping request from the UE and further to send a SIP request to the UE.</p> |
