METHOD FOR SELECTING A CODEC AS A FUNCTION OF THE NETWORK CAPACITY

• US 20070165644A1
• Filed: 07/26/2006
• Published: 07/19/2007
• Est. Priority Date: 08/05/2005
• Status: Active Grant

• Current Assignee: Avaya GmbH & Company KG (Avaya Incorporated)
• Original Assignee: Avaya GmbH & Company KG (Avaya Incorporated)
• Inventors: ROSSLER, Georg
• Granted Patent: US 8,248,935 B2
• Time in Patent Office: Days
• US Class Current: 370/395.200
• CPC Class Codes: H04M 1/2535 adapted for voice communication over an Internet Protocol [IP] network Voice over Internet Protocol (VoIP) network equipment and services H04M7/006; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04M 7/0072 Speech codec negotiation H04L65/1069 takes precedence

Abstract

The invention relates to a method for selecting a codec for transmission of audio and/or video data between terminals (1, 3) through a packet switching connection (2), the terminals (1, 3) selecting the codec from a codec list, characterized in that the codec list for a new connection is determined by means of a table in which for at least one destination address range, the associated transmission capacity is indicated and the table is automatically updated through measurements, as well as a terminal for carrying out the method.

Claims

1. Method for selecting a codec for transmission of audio and/or video data between terminals through a packet-switching connection, the terminals selecting the codec from a codec list, comprising:

determining a codec list for a new packet-switched connection between terminals using a table in which for at least one destination address range, the associated transmission capacity is indicated; and

automatically updating the table through transmission capacity measurements.

2. Method according to claim 1, wherein the sequence of codecs in the list expresses a preference for the selection.

3. Method according to claim 1, wherein the measurement is effected while a connection exists.

4. Method according to claim 1, wherein the measurement is effected by means of pairs or sequences of packets.

5. Method according to claim 1, wherein the table contains a default entry, which is valid for all addresses.

6. Method according to claim 1, wherein each table entry additionally contains a codec list.

7. Method according to claim 1, wherein each table entry additionally contains a confidence interval and/or the time of measurement.

8. Method according to claim 1, wherein, for selecting the codec, the table entry is used whose address range coincides to the largest extent with the address of the distant end.

9. Method according to claim 1, wherein the codec can be changed while a data connection exists.

10. Method according to claim 1, wherein the table is updated through correction of one or several table entries.

11. Method according to claim 1, wherein the table is updated through generation of a new table entry.

12. Method according to claim 1, wherein the table is updated through clearing up the table.

13. Method according to claim 1, wherein the packet-oriented connection is a VoIP (Voice over IP) connection.

14. Method according to claim 1, wherein the result of a measurement is exchanged between the terminals involved.

15. A computer readable medium comprising processor executable instructions for performing the steps of claim 1.

16. A terminal, comprising:

a memory comprising a table in which, for at least one destination address range, the associated transmission capacity is indicated; and

a module operable to use the table to determine a codec list for a new packet-switched connection between the terminal and another terminal; and

automatically update the table through transmission capacity measurements.

17. The terminal of claim 16, wherein the sequence of codecs in the list expresses a preference for the selection and wherein the measurement is effected while a connection exists.

18. The terminal of claim 16, wherein the measurement is effected by means of pairs or sequences of packets, wherein the table contains a default entry, which is valid for all addresses, and wherein each table entry additionally contains a codec list.

19. The terminal of claim 16, wherein each table entry additionally contains a confidence interval and/or the time of measurement, wherein, for selecting the codec, the table entry is used whose address range coincides to the largest extent with the address of the distant end wherein the codec can be changed while a data connection exists, and wherein the table is updated through correction of one or several table entries.

20. The terminal of claim 16, wherein the table is updated through generation of a new table entry.

21. The terminal of claim 16, wherein the table is updated through clearing up the table, wherein the packet-oriented connection is a VoIP (Voice over IP) connection, and wherein the result of a measurement is exchanged between the terminals involved.