Most schemes in mobile social networks
(MSNs) assume that nodes simply forward messages
without considering selfishness. We therefore first devise
social preference-based selfishness for MSNs by which
nodes decide to drop or keep (forward) and replace messages
to save buffer space according to the message preference
and the communities of nodes. We then propose a
novel cooperative forwarding scheme for social preference-
based selfishness in MSNs, the social preferenceaware
forwarding scheme (SPF) incorporates the proposed
message forwarding scheme and a buffer replacement
policy for the message preference. It takes advantage of
social information with the home-cell community-based
mobility model. Considering the contact probability and
buffer replacement policy for the message preferences,
SPF, therefore, efficiently delivers messages to the destination
by reflecting the degree of selfishness to which
nodes cooperatively manage their buffer spaces and how
frequently and how recently they meet. Consequently, all
nodes can cooperatively drop or keep (forward) and replace
the messages in the buffer spaces for the message
preferences in SPF. SPF outperforms Epidemic, PRoPHET,
and SimBet in terms of delivery ratio, network traffic,
buffer space, hop count, and replacement frequency.