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US 2021/0288840 A1Published application
Wireless communication system
AssigneePantech Wireless, LLC
InventorsPrabhakar R. Chitrapu, Narayan Parappil Menon, Fatih M. Ozluturk, Brian Gregory Kiernan
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Abstract
Methods and apparatus for communicating circuit switched voice data with a first cellular radio access network (RAN) and communicating voice over Internet protocol (VoIP) packets using session initiation protocol (SIP) with a second cellular RAN. The second cellular RAN does not support circuit switched voice communication.
Claims10
A user equipment comprising:
- a receiver;
- a transmitter;
- and
- a processor;
- and
- wherein the receiver, the transmitter, and the processor are configured to cause the user equipment:
- to transmit and receive circuit switched voice data with a first cellular radio access network (RAN);
- to transmit and receive voice over Internet protocol (VoIP) packets using session initiation protocol (SIP) with a second cellular RAN;
- and
- to process the VoIP packets using an AMR type codec,
- wherein the second cellular RAN does not support circuit switched voice communication.
8 more elements
A method for use in a user equipment, the method comprising:
- transmitting and receiving circuit switched voice data with a first cellular radio access network (RAN);
- transmitting and receiving voice over Internet protocol (VoIP) packets using session initiation protocol (SIP) with a second cellular RAN;
- and
- processing the VoIP packets using an AMR type codec,
- wherein the second cellular RAN does not support circuit switched voice communication.
2 more elements
Dependencies are inferred from the claim text.