WARF: P09290US

SmartRE: A Framework for Coordinated Network-Wide Caching


Srinivasa Akella, Ashok Anand, Vyas Sekar

The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing a caching framework to increase effective network bandwidth within computer networks.
OVERVIEWThe bandwidth of a computer network is a measure of the rate of data transfer.  Limits on bandwidth may result from physical limitations of the media as well as processing limitations.  Increasing bandwidth by methods such as adding additional links between nodes or adding faster hardware can be costly.  Alternative ways to increase bandwidth efficiency of existing networks are needed.

Application-independent Redundancy Elimination (RE) identifies and removes repeated content from network transfers and has been used successfully for improving network performance on enterprise access links.  RE involves resource-intensive tasks and is difficult to support while operating under tight resource constraints.
THE INVENTIONUW-Madison researchers have developed an apparatus for efficiently reducing redundant network transmissions in a network.  This new caching framework supports RE operations while conserving resources and improving load sharing across the network. 

Throughput of redundancy-aware devices can be increased by intelligently allocating compression and decompression responsibilities across a network.  The apparatus avoids repeated compression-decompression actions along a series of routers using an implicit coordination scheme, which reduces the resources used by the operation.  Resource conservation is magnified in that each decompression saves the transfer of content across several routers in the network.
  • Interest is growing among Internet service providers (ISPs) and router vendors for supporting Redundancy Elimination as a network-wide service.
  • Reducing congestion and improving network performance in data centers and wireless networks
  • Increasing bandwidth in computer networks
  • Supporting IP-layer RE in core routers
  • Employing RE inside data centers to alleviate congestion
  • Improving cooperative caching schemes in multi-hop wireless networks
  • Supports network-wide RE operations effectively while operating under resource constraints
  • Achieves four to five times greater compression benefits than link-by-link approaches to RE using the same amount of resources
  • Allows RE service to be introduced in an incremental, backward-compatible manner
STAGE OF DEVELOPMENTClick software prototypes of the coordinated caching framework have been built.

The development of this technology was supported by the WARF Accelerator Program. The Accelerator Program selects WARF’s most commercially promising technologies and provides expert assistance and funding to enable achievement of commercially significant milestones. WARF believes that these technologies are especially attractive opportunities for licensing.
For More Information About the Inventors
Contact Information
For current licensing status, please contact Emily Bauer at or 608-960-9842.
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