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US 5,953,322 AGranted
Cellular internet telephone
AssigneeQUALCOMM Incorporated
InventorRobert H. Kimball
Life of this patent
Estimating the term…
Abstract
A cellular telephone that provides the capability of performing Internet telephone calls without the bulk and expense of Internet telephone computer systems. The cellular telephone uses hardware vocoders and communication circuitry already present in the cellular telephone for normal cellular calls to provide the additional Internet telephone functionality.
Claims10
A cellular telephone, comprising:
- means for generating a set of digital data representing a voice signal from a user of the cellular telephone;
- means for encapsulating the digital data into a payload of a data packet if a telephone call is underway between the cellular telephone and a device coupled to a public-switched telephone network;
- means for generating an Internet Protocol (IP) packet that carries the digital data and means for encapsulating the IP packet into the payload of the data packet if a telephone call is underway between the cellular telephone and an Internet telephony device coupled to a communication network;
- means for transmitting the data packet to a base station such that if the payload contains the IP packet the base station extracts the IP packet from the payload and transfers the IP packet over the communication network and if the payload contains only the digital data the base station recovers the voice signal from the digital data and transfers the voice signal via the public-switched telephone network.
1 more element
A method for operating a cellular telephone, comprising the steps of:
- generating a set of digital data representing a voice signal from a user of the cellular telephone;
- encapsulating the digital data into a payload of a data packet yielding encapsulated data if a telephone call is underway between the cellular telephone and a device coupled to a public-switched telephone network;
- generating an Internet Protocol (IP) packet that carries the digital data and encapsulated data if a telephone call is underway between the cellular telephone and an Internet telephony device coupled to a communication network;
- and
- transmitting the data packet to a base station such that if the payload contains the IP packet the base station extracts the IP packet from the payload and transfers the IP packet over the communication network and if the payload contains only the digital data the base station recovers the voice signal from the digital data and transfers the voice signal via the public-switched telephone network.
2 more elements
Dependencies are inferred from the claim text.