Invention Grant
- Patent Title: Call setup logic with emerg-request-non-100 timer
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Application No.: US16561739Application Date: 2019-09-05
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Publication No.: US10687195B2Publication Date: 2020-06-16
- Inventor: Hsin-Fu Henry Chiang , Boris Antsev , William Michael Hooker
- Applicant: T-Mobile USA, Inc.
- Applicant Address: US WA Bellevue
- Assignee: T-Mobile USA, Inc.
- Current Assignee: T-Mobile USA, Inc.
- Current Assignee Address: US WA Bellevue
- Agency: Lee & Hayes, P.C.
- Main IPC: H04W4/90
- IPC: H04W4/90 ; H04L29/06 ; H04W80/10
Abstract:
Multiple timers used by a device during setup of a communication session may include a first timer and a second timer, each configured to expire after different periods of time, and each configured to start in response to the device sending a Session Initiation Protocol (SIP) request using a SIP INVITE method. The first timer is stopped on receipt of the first SIP response, which may include a 100. Trying SIP response, while the second timer is stopped on receipt of a non-100 Trying SIP response. If the first timer expires, the device may send an additional SIP request using the SIP INVITE method as a retry mechanism while the second timer continues to run. If the second timer expires, the device may halt the session setup and reattempt using a different type of access network.
Public/Granted literature
- US20190394630A1 CALL SETUP LOGIC WITH EMERG-REQUEST-NON-100 TIMER Public/Granted day:2019-12-26
Information query
