OPTIMIZATION OF STREAMING DATA THROUGHPUT IN UNRELIABLE NETWORKS

• US 20110002236A1
• Filed: 09/13/2010
• Published: 01/06/2011
• Est. Priority Date: 06/28/2004
• Status: Active Grant

• Current Assignee: S Aqua Semiconductor LLC (Intellectual Ventures LLC)
• Original Assignee: Videopression LLC (Intellectual Ventures LLC)
• Inventors: Zakhor, Avideh, Chen, Minghua
• Granted Patent: US 8,379,535 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 41/5009 Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
• CPC Class Codes: H04L 41/5019 Ensuring fulfilment of SLA
• CPC Class Codes: H04L 43/0835 One way packet loss
• CPC Class Codes: H04L 43/0864 Round trip delays
• CPC Class Codes: H04L 43/106 using time related information in packets, e.g. by adding timestamps
• CPC Class Codes: H04L 43/16 Threshold monitoring
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/193 at the transport layer, e.g. TCP related
• CPC Class Codes: H04L 47/25 with rate being modified by the source upon detecting a change of network conditions
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/762 triggered by the network
• CPC Class Codes: H04L 47/822 Collecting or measuring resource availability data
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04W 28/0242 Determining whether packet losses are due to overload or to deterioration of radio communication conditions
• CPC Class Codes: H04W 28/10 Flow control between communication endpoints
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 80/06 Transport layer protocols, e.g. TCP [Transport Control Protocol] over wireless transmission control protocol/Internet protocol [TCP/IP] or user datagram protocol [UDP] H04L69/16

Abstract

Multiple TRFC connections transport streaming data through a wireless channel, and the difference between measured round trip times of packets and minimum round trip time is used to adjust the number of TFRC connections to fully utilize bandwidth through the wireless channel.

Claims

1. A method, comprising:

increasing a data rate of at least one data stream transmitted at least partially over a wireless network between a sending device and a receiving device;

calculating a threshold according to a minimum round trip time for a plurality of packets in the data stream;

accumulating round trip times for a predetermined number of the plurality of packets;

calculating an average round trip time by dividing a sum of the accumulated round trip times by the predetermined number of the plurality of packets; and

decreasing the data rate if a difference between the average round trip time and the minimum round trip time exceeds the threshold, otherwise increasing the data rate.

2. The method of claim 1 further comprising:

including at least one marked packet in the data stream to be used in packet loss rate estimation and at least one unmarked packet to be excluded from packet loss rate estimation; and

distributing the marked packets within the data stream to approximate inter-packet timing of packets.

3. The method of claim 1 further comprising additively decreasing the data rate of the data stream.

4. The method of claim 1 further comprising multiplicatively decreasing the data rate of the data stream.

5. The method of claim 1 further comprising preventing decreasing the data rate of the data stream below a normal data rate of a transmission control protocol friendly rate control (TFRC) connection.