System and method for connecting mobile devices

• US 20070189275A1
• Filed: 02/08/2007
• Published: 08/16/2007
• Est. Priority Date: 02/10/2006
• Status: Active Grant

• Current Assignee: III Holdings 2, LLC
• Original Assignee: PacketVideo Corporation (Nippon Telegraph and Telephone Corporation)
• Inventors: Neff, Ralph
• Granted Patent: US 7,808,988 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04L 65/70 Media network packetisation
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04N 7/148 Interfacing a video terminal to a particular transmission medium, e.g. ISDN
• CPC Class Codes: H04W 28/22 Negotiating communication rate

Abstract

A system and a method connect mobile devices via channels which connect a first terminal and a second terminal. A bearer establishment of the connection is identified by the first terminal and/or the second terminal. The first terminal accesses information to identify the second terminal and/or to select a first codec for data to transmit the data in the first codec between the terminals. The first terminal alternatively chooses a first codec without accessing the information. The data in the first codec is transmitted from the first terminal to the second terminal without an exchange of codec capabilities and/or codec preferences. The second terminal is capable of receiving the data sent in the first codec. Alternatively, the second terminal may be incapable of receiving the data sent in the first codec. The first terminal uses capability and/or preference information received from the second terminal to detect cases whether the second terminal is incapable of receiving the data in the first codec. The first terminal identifies a second codec for the data which is acceptable by the second terminal for receiving the data. The first terminal changes from transmitting the data in the first codec to transmitting the data in the second codec. The second terminal receives and/or accepts the data sent in the second codec. The capability information and/or the preference information of the second terminal is stored in the first terminal and/or in a database accessible by the first terminal.

Claims

1. A system for transmitting data wherein the data is audio signals, video signals or accelerated control negotiation protocol signals, the system comprising:

a network which transmits the data;

a first terminal connected to the network wherein the first terminal receives and transmits the data via the network;

a second terminal connected to the network wherein the second terminal communicates with the first terminal via the network; and

a first database accessible by the first terminal wherein the database has a plurality of codecs wherein the first database stores an association of the second terminal with a first codec wherein the first terminal provides an identification of the second terminal, uses the identification to select the first codec from the first database and transmits the data in the first codec to the second terminal via the network.

2. The system of claim 1 wherein the second terminal displays the data in the first codec.

3. The system of claim 1 further comprising:

a channel established between the first terminal and the second terminal wherein the channel is associated with the first codec wherein the data is transmitted via the channel.

4. The system of claim 1 wherein the first terminal receives a codec capability of the second terminal with a second codec and stores in the first database an association of the codec capability with the second terminal.

5. The system of claim 1 wherein the first terminal uses information entered by a user to provide the identification of the second terminal.

6. The system of claim 1 wherein the first terminal uses a database of contact information to provide the identification of the second terminal.

7. The system of claim 1 wherein the first terminal uses a caller identification service provided by the network to provide the identification of the second terminal.

8. The system of claim 1 wherein a transmission from the second terminal to the first terminal conveys that the second terminal is not capable of receiving data in the first codec.

9. The system of claim 1 further comprising:

a message transmitted from the second terminal to the first terminal wherein the first terminal switches the data transmission from the first codec to the second codec.

10. The system of claim 1 wherein the network is wireless.

11. A system for transmitting data wherein the data is audio signals, video signals or accelerated control negotiation protocol signals, the system comprising:

a network which transmits the data;

a first terminal connected to the network wherein the first terminal receives and transmits the data via the network;

a second terminal connected to the network wherein the second terminal communicates with the first terminal via the network;

a plurality of codecs wherein the first terminal selects a default codec from the plurality of codecs without identifying codec capabilities of the second terminal and transmits the data in the default codec to the second terminal via the network.

12. The system of claim 11 wherein a message transmitted from the second terminal identifies a codec capability of the second terminal with at least one of the plurality of codecs.

13. The system of claim 11 further comprising:

a database accessible by the first terminal wherein the first terminal receives a codec capability of the second terminal with a second codec and stores an association of the codec capability with the second terminal in the database.

14. The system of claim 11 further comprising:

a first channel established between the first terminal and the second terminal wherein the first channel is associated with the default codec wherein a message from the second terminal to the first terminal provides an acceptable codec associated with a second channel.

15. The system of claim 11 wherein the default codec is a predicted codec based on information entered by a user.

16. A method for transmitting data wherein the data is audio signals, video signals or accelerated control negotiation protocol signals, the method comprising the steps of:

connecting a first terminal and a second terminal wherein the first terminal and the second terminal communicate via a network;

assigning a code to each of a plurality of codecs wherein the code assigned to a first codec is different than the code assigned to a second codec wherein each codec of the plurality of codecs corresponds to a potential codec capability of the second terminal;

establishing a connection between the first terminal and the second terminal over the network wherein a channel is opened between the first terminal and the second terminal via the connection wherein the data is transmitted between the first terminal and the second terminal via the channel before the first terminal has received codec capabilities transmitted from the second terminal to the first terminal; and

transmitting the data from the first terminal to the second terminal via the channel wherein the data is transmitted in the first codec wherein the first terminal makes an identification of the second terminal wherein the first terminal selects the first codec from the plurality of codecs based on the identification wherein the first codec corresponds to a known codec capability of the second terminal.

17. The method of claim 16 further comprising the step of:

identifying the codec capability of the second terminal wherein the codec capability of the second terminal is stored in a database accessible by the first terminal.

18. The method of claim 16 further comprising the step of:

transmitting a message from the first terminal to the second terminal with data in the first codec wherein the second terminal uses the message to provide a codec capability of the first terminal with at least one of the plurality of codecs.

19. The method of claim 16 further comprising the step of:

switching the data from the first codec to a second codec wherein the first terminal transmits the data in the second codec to the second terminal.

20. The method of claim 16 further comprising the step of:

arranging the plurality of codecs into a chart accessible by the first terminal and the second terminal.