Scalable aggregation-based packet forwarding in Content Centric Networking

Abstract

Content Centric Networking (CCN) is one of the Future Internet architectures that aims at improving content distribution and retrieval, where content is requested by name rather than IP address. Each content is partitioned into small units, namely chunks. In CCN, the consumer sends Interest packet in order to get a chunk of Data. Upon successful reception of the requested chunk, the consumer sends the next Interest packet. This policy of send Interest, wait for the Data to reach and generate next Interest makes the situation worst in case of large sized content. The result is uplink underutilization. To overcome the above highlighted issue, we propose Interest forwarding in CCN, which is based on packet aggregation through combining multiple chunk requests in one Interest packet, and content name aggregation. The Interest packet aggregation will reduce the number of Interest packets need to be sent in the network and downsize Pending Interest Table (PIT), while organizing content based on aggregated name reduces Content Store (CS) entries. The simulation results show that our proposal achieves high performance with throughput improvement, reduced number of Interest packets in network, PIT and CS entries over other existing proposal in the literature.