Abstract:
In this era of huge data traffic, the information-centric network (ICN) is a switch
ing strategy from conventional host-centric communication to a new data-centric
one. In-network caching an integral part of ICN can reduce the shortcomings
of today’s location-based internet paradigm. As ICN has limited caching ca
pability, the decision of optimal routing and content placement are the major
challenges. In this study, we suggest a hybrid caching with a dynamic forward
ing (HCDF) strategy which takes advantage of the off-path hash routing scheme
and on-path caching scheme. To facilitate both caching schemes, a fraction of
the caching space is allotted in each cache node for local caching. At the user-end
segment, an estimation-based content placement (ECP) policy is designed using
content popularity state and cache node position. This policy helps to cache pop
ular content near the consumer’s location using the shared cache space. At the
server-end segment, the HCDF scheme dynamically selects the most appropriate
routing strategy among three strategies (symmetric, asymmetric, and multicast)
based on hop count and path stretch. To demonstrate the effectiveness of HCDF,
extensive simulation on real-world internet topologies has been carried out. From
our investigation, it is observed that the suggested approach exhibits an impres
sive performance in terms of cache hit, latency, and average link load compared
to other standard hash routing and well-known on-path caching schemes.ICN;
Hash routing; Hybrid caching; Content placement; Caching strategy
