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Differentiating Congestion Vs. Random Loss: A Method For Improving TCP Performance Over Wireless Links

Technology Benefits

The new UC technology provides the following benefits: Accurately determines random wireless losses Provides quick and efficient error-recovery Provides high throughput and low end-to-end delay and delay variance over networks with a simple bottleneck link

Technology Application

Wireless internet communications

Detailed Technology Description

University of California scientists have developed a breakthrough method that can identify network losses as either random or congestive. In addition, this new method responds appropriately to all network losses. By identifying random losses at the TCP source, the revolutionary system eliminates the need to reduce the TCP’s transmission rate for non-congestive losses.

Supplementary Information

Patent Number: US7200111B2
Application Number: US2001945106A
Inventor: Garcia Luna Aceves, Jose Joaquin | Parsa, Christina
Priority Date: 31 Aug 2000
Priority Number: US7200111B2
Application Date: 30 Aug 2001
Publication Date: 3 Apr 2007
IPC Current: G01R003108 | H04L000118 | H04L001228 | H04L001256 | H04L002906 | H04L000116
US Class: 370230 | 370229 | 370231 | 370232 | 370235
Assignee Applicant: The Regents of the University of California
Title: Method for improving TCP performance over wireless links
Usefulness: Method for improving TCP performance over wireless links
Summary: For enhancing TCP performance in wireless network by distinguishing congestion versus random loss.
Novelty: Packet loss differentiating method in wireless network, involves designating packet loss as congestion-related packet loss, if packet loss is preceeded by increase in queue length

Industry

ICT/Telecom

Sub Category

Telecommunication

Application No.

7200111

Others

Additional Technologies by these Inventors

• Scalable Integrated Services Architecture for Computer Networks
• Scalable Multicast Routing Protocol for Wireless and Mobile Computer Networks
• Receiver Initiated Channel Hopping (RICH)
• Bandwidth Efficient Source Tracing (Best) for Wireless Networks
• On-Demand Loop-Free Multipath Routing
• Improving TCP Congestion Control over Networks with Heterogeneous Transmission Media
• Mpath: A Loop-Free Multipath Routing Algorithm
• Receiver Initiated Multiple Access for Ad Hoc Networks
• Group Coordination Protocol for Networked Multimedia Systems
• System and Method for Ad Hoc Network Access Employing the Distributed Election of a Shared Transmission Schedule
• Tree-Based Ordered Multicasting in Computer Networks
• HIDRA: Method for Hiding Mobility, Multiplexing, and Multi-Homing from Internet Applications

Tech ID/UC Case

10189/2000-352-0

Related Cases

2000-352-0

*Abstract

Mobile users worldwide are increasingly using wireless devices to access the internet, and thus, there is a greater need for reliable client-server communications over wireless links.  However, the current internet protocol for reliability, TCP, has demonstrated severe performance problems when operated over wireless links. TCP has multiple problems with its congestion control algorithms because TCP can only use packet loss to detect congestion in the network.  In addition, wireless links are inherently inferior and suffer from long periods of fading. TCP has no mechanism to differentiate these losses from congestion, so it treats all losses as congestive by reducing its transmission window. This effectively reduces the throughput of the connection by more than half.

*IP Issue Date

Apr 3, 2007

*Principal Investigator

Name: Jose Joaquin(JJ Garcia-Luna-Aceves

Department:

Name: Christina Parsa

Department:

Country/Region

USA