SYSTEMS, PROCESSES AND INTEGRATED CIRCUITS FOR RATE AND/OR DIVERSITY ADAPTATION FOR PACKET COMMUNICATIONS

• US 20130250938A1
• Filed: 05/06/2013
• Published: 09/26/2013
• Est. Priority Date: 08/10/1999
• Status: Active Grant

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Anandakumar, Krishnasamy, Viswanathan, Vishu R., McCree, Alan V.
• Granted Patent: US 9,106,533 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04B 7/06 at the transmitting station
• CPC Class Codes: H04L 43/0829 Packet loss
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/752 adapting media to network capabilities
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 28/24 Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]

Abstract

Packets of real-time information are sent with a source rate greater than zero kilobits per second, and a time or path or combined time/path diversity rate initially being zero kilobits per second. This results in a quality of service QoS, optionally measured at the sender or the receiver. When the QoS is on an unacceptable side of a threshold of acceptability, the sender sends diversity packets at an increased rate. Increasing the diversity rate while either reducing or maintaining the overall transmission rate is new. CELP-based multiple-description data partitioning sends the base or important information plus a subset of fixed excitation in one packet and sends the base or important information plus the complementary subset of fixed excitation in another packet. Reconstruction produces acceptable quality when only one of the two packets is received and better quality when both packets are received. Reconstruction provides for single and multiple lost packets.

Claims

1. A process of sending packets on a network, comprising:

A. sending source packets of real-time, voice information from a sender to a receiver on the network at a first source rate that is equal to a first transmission rate;

B. receiving at the sender packet loss information based on a loss of source packets at the receiver;

C. comparing in the sender the packet loss information with a threshold number; and

D. when the packet loss information is greater than the threshold number, sending the source packets at a second source rate and sending at least one of time and path diversity of the real-time, voice information at a first diversity rate, the sum of the second source rate and the first diversity rate being equal to the first transmission rate.

2. The process of claim 1 including comparing in the sender the packet loss information with a threshold number of three percent.

3. The process of claim 1 in which the sending at least one of time and path diversity includes sending diversity packets with the source packets.

4. The process of claim 1 in which the receiving includes receiving a Real Time Transport Control Protocol report packet.

5. The process of claim 1 including sending the source packets at the first source rate of 16.0 kilobits per second and the sum of the second source rate and the first diversity rate is 11.2 kilobits per second.

6. The process of claim 1 including sending the source packets at the first source rate of 11.2 kilobits per second and the sum of the second source rate and the first diversity rate is 8.0 kilobits per second.

7. The process of claim 1 including sending the source packets at the first source rate of 8.0 kilobits per second and the sum of the second source rate and the first diversity rate is 5.7 kilobits per second.

8. The process of claim 1 in which the sending the source packets at a second source rate includes coding the voice information with more compression than when sending the source packets at the first source rate.