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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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...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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...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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...ze the information forwarding process in OppNets, including recently proposed approaches based on exploiting information on social ties between individuals to optimize information diffusion [1], [2], =-=[3]-=-. A common features of these approaches is that, before taking a decision on whether sharing an information with an encountered individual, users have to exchange some type of sensitive information, s...

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...is carrying personal information that might be interesting to others. The reach of information can be further extended by using DTN, where other devices carry information between disconnected devices =-=[19; 24; 8]-=-. An evaluation method is needed for developing applications that use direct communication between mobile devices. Simulations are often used for investigating the behavior of wireless networks. The r...

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...0 4,390 2,070 1,420 970 MIT Contacts 213,500 92,300 50,100 28,200 17,500 9,700 see that the total number of contacts decreases when the social feature difference between two individuals increases. In =-=[11]-=-, Mei et al. found that individuals with similar social features tend to contact each other more often in HCNs. Hence, we believe that designing a new routing protocol by considering the social featur...