Ping I Liu

US Patent:

7720065, May 18, 2010

Filed:

Feb 29, 2008

Appl. No.:

12/040252

Inventors:

Ping Liu - Simpsonville SC, US
Scott Charles Evans - Burnt Hills NY, US
Ishan Prabhath Weerakoon - Rockville MD, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H04L 12/26

US Classification:

370389, 370229

Abstract:

A method and apparatus for biasing of network node packet prioritization based on packet content. The method may include marking a packet of data from a data stream of packets. The packet can be marked with a packet type such that subsequent nodes determine the relative priority of the packet with respect to other packets from the same data stream based on the packet type marking. The marked packet can then be transmitted. According to a related corresponding embodiment, a method can include receiving a packet at a node in a network, the node including a plurality of packet queues including a higher priority queue and a lower priority queue. The relative priority of the packet can be determined relative to other packets from the same packet source and intended for the same destination, where the relative priority can be based on the contents of the packet. The relative priority may also be based on a marking of the packet. The packet can be assigned to a higher priority queue based on a higher relative priority of the packet.

US Patent:

8228982, Jul 24, 2012

Filed:

Sep 22, 2009

Appl. No.:

12/564303

Inventors:

Zhebin Qian - ShangHai, CN
Yu Zhang - ShangHai, CN
Ping Liu - Simpsonville SC, US
Li Xu - ShangHai, CN

Assignee:

UTC Fire & Security Corporation - Farmington CT

International Classification:

H04N 11/02

US Classification:

37524002, 37524012, 37524016

Abstract:

A method of transmitting a video stream over an IP network. The method includes encoding a source video into a plurality of packets. The method also includes measuring a real-time transmission status of a current set of the plurality of packets. The method also includes mapping a utility curve for the video which reflects utilities of the video at corresponding sending rates. The method also includes calculating a target sending rate for a next set of the plurality of packets according to the real-time transmission status of the current set of the plurality of packets and the utility curve. The method also includes determining a proper strategy to meet the target sending rate for the next set of the plurality of packets.