| Popis: |
The delay tolerant networking architecture was proposed for the networks where the typical assumptions made for the Internet fails. One of the primary characteristics of such networks is the intermittent connectivity among the nodes, resulting in the lack of end-to-end communication paths. Unlike the Internet, mobile ad-hoc networks (MANETs) and other forms of traditional networks, message transfers in Delay Tolerant Networks (DTNs) follow the store-carry-and-forward paradigm. It is, therefore, crucial that the nodes in DTNs cooperate among themselves to help the messages reach their respective destinations. Such favorable environments, however, are not obtained in the presence of selfish/malicious nodes. In this chapter, we present a survey of the different schemes proposed in the literature to enforce cooperation in DTNs. We identify the different aspects on which nodes in DTNs could cooperate, and review the different schemes proposed for the same. Specifically, we explore in detail the incentive-based and game theory inspired mechanisms adopted for the same. To the best of our knowledge, no survey on cooperation in DTNs has been presented so far. |
