COPSS: An Efficient Content Oriented Publish/Subscribe System

Content-Centric Networks (CCN) provide substantial exi-bility for users to obtain information without regard to the source of the information or its current location. Publish/ subscribe (pub/sub) systems have gained popularity in so-ciety to provide the convenience of removing the temporal dependency of the user having to indicate an interest each time he or she wants to receive a particular piece of related information. Currently, on the Internet, such pub/sub sys-tems have been built on top of an IP-based network with the additional responsibility placed on the end-systems and servers to do the work of getting a piece of information to in-terested recipients. We propose Content-Oriented Pub/Sub System (COPSS) to achieve an ecient pub/sub capability for CCN. COPSS enhances the heretofore inherently pull-based CCN architectures proposed by integrating a push based multicast capability at the content-centric layer. We emulate an application that is particularly emblematic of a pub/sub environment|Twitter|but one where sub-scribers are interested in content (e.g., identied by key-words), rather than tweets from a particular individual. Us-ing trace-driven simulation, we demonstrate that our archi-tecture can achieve a scalable and ecient content centric pub/sub network. The simulator is parameterized using the results of careful microbenchmarking of the open source CCN implementation and of standard IP based forwarding. Our evaluations show that COPSS provides considerable performance improvements in terms of aggregate network load, publisher load and subscriber experience compared to that of a traditional IP infrastructure. 1