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... to take longer than when the similarity is high (with more common neighbors). In addition, there are other ways to define the similarity beyond common neighbors, such as similarity on user interests =-=[91]-=- and similarity on user locations [92]. E. Friendship Friendship is another concept in sociology which describes close personal relationships. In DTNs, friendship can be defined between a pair of node...

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...cial related applications can benefit from cloud offloading and CloudShield [18] exploits sociality among smartphone clones to stop worm propagation in smartphones. Similarly, also systems like [19], =-=[20]-=-, [21], [22] might benefit from offloading computation to the cloud. The work in [10] presents energy models that trade-off the energy consumption on the mobile device versus the energy needed to send...

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...ial features of each node (individual). These social features are considered to be very important- namely, in that people come into contact more frequently if they have more social features in common =-=[13]-=-. We obtain the number of contacts between pairwise • Yunsheng Wang and Jie Wu are with the Department of Computer and Information Sciences, Temple University, E-mail: {yunsheng.wang, jiewu}@temple.ed...

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... sociality of human beings while the latter utilizing the spatial characteristics of human mobility to select relays. BUBBLE [8], SimBet[9], SocialCast [17], user-centric dissemination [18], and SANE =-=[19]-=-, are social-based mechanisms, where a more popular person has a higher chance to be utilized as a relay. MobySpace [20] is a location-based approach. It selects a node with a similar mobility pattern...

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... work on greedy routing in computer networks uses vertex coordinates in 2and 3-dimensional Euclidean or hyperbolic spaces. However, one very recent exception to this restriction is work by Mei et al. =-=[24]-=-, who study category-based greedy routing as a heuristic for performing routing in dynamic delay-tolerant networks of computing devices. Mei et al. assume that the network nodes have 3 been organized ...

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...s possible to measure the social similarities between individuals and generate social groups with common social features. Social features are available and have been used in DTNs for routing guidance =-=[24]-=-, [25]. For example, the data set of Infocom 2006 [26] includes answers from each participant to a questionnaire with a number of social information about this person, such as nationality, affiliation...

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...work model very complex. If storage capacity on the nodes is not accounted for in the analysis, unfair advantage would be given to social-aware approaches, which extensively use state information. In =-=[14]-=-, a stateless approach has been presented; this approach is motivated by the observation that individuals with similar interests meet relatively more often than individuals with diverse interests. The...

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...ts such that nodes within the same community could communicate directly when published data items match the interests of nodes, while brokers are used to bridge different communities. Similarly, SANE =-=[24]-=- described a social-aware forwarding scheme which utilizes user interests and their similarity to assist making forwarding decisions. In these three studies, each published data item belongs to a part...

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...to X . As an example if content X is ”weather forecast for New York city”, p(X) will be the geographical position of the city of New York to which the content X refers to. Furthermore, as in [15] and =-=[16]-=-, we suppose that both the users of the satellite network and the contents are characterized by the so-called interest profile: Trans. Emerging Tel. Tech. 2012; 00:1–8 c© 2012 John Wiley & Sons, Ltd. ...

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... queries in MASONs. On the other hand, although several routing algorithms have been proposed for opportunistic networks by exploiting social relations among mobile users to achieve efficient routing =-=[11]-=-, [12], [13], [14], [15], [16], they are developed for generic communications, without consideration of the unique needs and constraints in data query. Among them, Zhu et al. [16] is the most recent o...