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US 2004/0165704 A1Published application

Method for diverting an ISUP talkpath to an IP talkpath

AssigneeAT&T Wireless Services, Inc.

InventorsJeffrey Rhodes, Hong Zhao

Life of this patent

Estimating the term…

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Abstract Drawings Claims Description

Abstract

A method for improving the sound quality of voice signals transmitted during a call between two digital wireless telephones by diverting the call from a circuit switched network to a data network is disclosed. In accordance with the present invention, a call setup procedure using the circuit switched network is modified so that the calling party may determine the following information: 1) whether the called party's digital wireless telephone is able to support one of the voice compression algorithms supported by the calling party's digital wireless telephone and 2) whether both wireless telephones have access to the same data network. If the called party's digital wireless telephone is able to support one of the voice compression-algorithms supported by the calling party's digital wireless telephone and both wireless telephones have access to the same data network, the circuit switched network call setup procedure is abandoned before the called party answers the call and the call is completed using the data network. Completing the call by encoding voice signals using a common voice compression algorithm executed by the digital wireless telephones and by sending the encoded voice signals through a data network eliminates the drawbacks associated with the additional intermediate encoding which would have been required if the call had been completed using the circuit switched network.

Claims45

Dependent claims

Claim 1A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 83 words4 dependent Claim 6The method of claim l · 15 wordsNo dependents Claim 7A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 217 words4 dependent Claim 12A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 201 words4 dependent Claim 17A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 205 words4 dependent Claim 22A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 204 words4 dependent Claim 27A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 148 words3 dependent Claim 31A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 152 words3 dependent Claim 35A method for diverting an integrated Services Digital Network User Part (ISUP) network talkpath to a data network talkpath · 120 wordsNo dependents Claim 36A computer-readable medium whose contents cause a computer system to improve a quality of voice signals exchanged via a circuit switched network between audio devices · 156 words3 dependent Claim 40A computer-readable medium whose contents cause a computer system to improve a quality of voice signals exchanged via a circuit switched network between to audio devices · 161 words3 dependent Claim 44An apparatus for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 186 wordsNo dependents Claim 45An apparatus for improving a quality of voice signals exchanged via a circuit switched network between audio devices · 190 wordsNo dependents

A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising the steps of:

determining whether a called party's audio device is able to support at least one voice compression algorithm supported by a calling party's audio device;
and
exchanging voice signals between said called party's audio device and said calling party's audio device via a data network, if said called party's audio device is able to support said at least one voice compression algorithm.

The method of claim l, wherein said data network is an Internet protocol (IP) network.

A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising the steps of:

sending a call request message from a calling party's audio device to a first line/network interface switch, said call request message identifying at least one voice compression algorithm supported by said calling party's audio device;
receiving said call request message at said first line/network interface switch;
sending said call request message from said first line/network interface switch to a second line/network interface switch via the circuit switched network;
receiving said call request message at said second line/network interface switch;
sending said call request message from said second line/network interface switch to a called party's audio device;
receiving said call request message at said called party's audio device;
sending a response message from said called party's audio device to said one of said first line/network interface switch and said calling party's audio device via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
exchanging voice signals between said called party's audio device and said calling party's audio device via a data network, if said called party's audio device is able to support said at least one voice compression algorithm.

6 more elements

A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising the steps of:

sending a call request message from a calling party's audio device to a first line/network interface switch, said call request message identifying at least one voice compression algorithm supported by said calling party's audio device;
receiving said call request message at said first line/network interface switch;
sending said call request message from said first line/network interface switch to a second line/network interface switch via the circuit switched network;
receiving said calf request message at said second line/network interface switch, said second line/network interface switch being associated with a called party's audio device;
sending a response message from said second line/network interface switch to one of said calling party's audio device and said first line/network interface switch via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
exchanging voice signals between said called party's audio device and said calling party's audio device via a data network, if said called party's audio device is able to support said at least one voice compression algorithm.

4 more elements

A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising the steps of:

receiving a call request message at a first line/network interface switch;
modifying said call request message to identify at least one voice compression algorithm supported by said calling party's audio device;
sending said modified call request message from said first line/network interface switch to a second line/network interface switch via the circuit switched network;
receiving said modified call request message at said second line/network interface switch;
sending said modified call request message from said second line/network interface switch to a called party's audio device;
receiving said modified call request message at said called party's audio device;
sending a response message from said called party's audio device to one of said calling party's audio device and said first line/network interface switch via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
exchanging voice signals between said called party's audio device and said calling party's audio device via a data network, if said called party's audio device is able to support said at least one voice compression algorithm.

6 more elements

A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising the steps of:

sending a call request message from a calling party's audio device to a first line/network interface switch;
receiving said call request message at said first line/network interface switch;
modifying said call request message to identify at least one voice compression algorithm supported by said calling party's audio device;
sending said modified call request message from said first line/network interface switch to a second line/network interface switch via the circuit switched network;
receiving said call request message at said second line/network interface switch, said second line/network interface switch being associated with a called party's audio device;
sending a response message from said second line/network interface switch to one of said calling party's audio device and said first line/network interface switch via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
exchanging voice signals between said called party's audio device and said calling party's audio device via a data network, if said called party's audio device is able to support said at least one voice compression algorithm.

5 more elements

A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising the steps of:

receiving a call request message from a calling party's audio device, said call request message identifying at least one voice compression algorithm supported by said calling party's audio device;
sending said call request message to one of a called party's audio device and a line/network interface switch associated with said called party's audio device via the circuit switched network;
receiving a response via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
enabling said calling party's audio device and said called party's audio device to exchange voice information via a data network if said called party's audio device is able to support said at least one voice compression algorithm.

2 more elements

A method for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising the steps of:

receiving a call request message from a calling party's audio device;
modifying said call request message to identify at least one voice compression algorithm supported by said calling party's audio device;
sending said modified call request message to one of a called party's audio device and a line/network interface switch associated with said called party's audio device via the circuit switched network;
receiving a response message via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
enabling said calling party's audio device and said called party's audio device to exchange voice information via a data network if said called party's audio device is able to support said at least one voice compression algorithm.

3 more elements

A method for diverting an integrated Services Digital Network User Part (ISUP) network talkpath to a data network talkpath, comprising the steps of:

determining, using an ISUP signaling path, whether a called party's telephone is adapted to exchange voice signals via a same data network to which a calling party's telephone is adapted to exchange voice signals, said ISUP signaling path being established during a process of establishing the ISUP network talkpath;
establishing the data network talkpath using resources associated with said same data network if said called party's telephone is adapted to exchange voice signals via said same data network;
and
exchanging voice signals between said called party's telephone and said calling party's telephone using the data network talkpath.

1 more element

A computer-readable medium whose contents cause a computer system to improve a quality of voice signals exchanged via a circuit switched network between audio devices, by performing the steps of:

receiving a call request message from a calling party's audio device, said call request message identifying at least one voice compression algorithm supported by said calling party's audio device;
sending said call request message to one of a called party's audio device and a line/network interface switch associated with said called party's audio device via the circuit switched network;
receiving a response via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
enabling said calling party's audio device and said called party's audio device to exchange voice information via a data network if said called party's audio device is able to support said at least one voice compression algorithm.

2 more elements

A computer-readable medium whose contents cause a computer system to improve a quality of voice signals exchanged via a circuit switched network between to audio devices, by performing the steps of:

receiving a call request message from a calling party's audio device;
modifying said call request message to identify at least one voice compression algorithm supported by said calling party's audio device;
sending said modified call request message to one of a called party's audio device and a line/network interface switch associated with said called party's audio device via the circuit switched network;
receiving a response message via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
enabling said calling party's audio device and said called party's audio device to exchange voice information via a data network if said called party's audio device is able to support said at least one voice compression algorithm.

3 more elements

An apparatus for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising:

a processor,
a computer readable memory segment adapted to be connected to said processor,
a diversion module included within said computer readable memory, said diversion module comprising computer program code segments which, when executed by said processor, implement the following steps:
receiving a call request message from a calling party's audio device, said call request message identifying at least one voice compression algorithm supported by said calling party's audio device;
sending said call request message to one of a called party's audio device and a line/network interface switch associated with said called party's audio device via the circuit switched network;
receiving a response via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
enabling said calling party's audio device and said called party's audio device to exchange voice information via a data network if said called party's audio device is able to support said at least one voice compression algorithm.

5 more elements

An apparatus for improving a quality of voice signals exchanged via a circuit switched network between audio devices, comprising:

a processor,
a computer readable memory segment adapted to be connected to said processor,
a diversion module included within said computer readable memory, said diversion module comprising computer program code segments which, when executed by said processor, implement the following steps:
receiving a call request message from a calling party's audio device;
modifying said call request message to identify at least one voice compression algorithm supported by said calling party's audio device;
sending said modified call request message to one of a called party's audio device and a line/network interface switch associated with said called party's audio device via the circuit switched network;
receiving a response message via the circuit switched network, said response message indicating whether said called party's audio device is able to support said at least one voice compression algorithm;
and
enabling said calling party's audio device and said called party's audio device to exchange voice information via a data network if said called party's audio device is able to support said at least one voice compression algorithm.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/790,070Filed 2 Mar 2004
Priority: 7 Jun 1999
Published: 26 Aug 2004
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04W 88/181
Service support devices; Network management devices: transcoding devices; Rate adaptation devices
H04W 4/00
Services specially adapted for wireless communication networks
H04W 4/16
Services specially adapted for wireless communication networks; Facilities therefor: communication-related supplementary services, e.g.…
H04W 76/20
Connection management: manipulation of established connections

Family

Application09/326,265Continuation · filed 7 Jun 1999
Application09/628,980Continuation · filed 11 Feb 2000
Application10/790,070Continuation · filed 2 Mar 2004
US 6,775,270 B1Related patent
US 7,626,978 B2Related patent
US 2004/0165704 A1This patent

From the US filing history. Foreign family members aren’t listed.

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