Delay-Tolerant Networks (DTNs) routing protocols assume that nodes are cooperative to forward packets to other nodes. In real world, however, most of the nodes are non-cooperative because of resource and energy constrains. In this paper, we consider node cooperation in sending and receiving a message with probability ps and pr, respectively. We model this node cooperation behavior by using Ordinary Differential Equations (ODEs) and study impact of message lifetime (Et) on performance of the Two-Hop Routing (2HR) and Epidemic Routing (ER). We validate our model by extensive simulations. Results show that for lower Et delivery delay is same irrespective of node cooperation.
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机译：延迟宽容网络（DTN）路由协议假设节点是协同转发到其他节点的数据包。然而，在现实世界中，由于资源和能量限制，大多数节点都是非合作的。在本文中，我们考虑分别在发送和接收具有概率P S 和P R 的消息时的节点合作。我们通过使用普通微分方程（ODES）来模拟该节点合作行为，并研究消息寿命（et）对两跳路由（2hr）和疫情路由（ER）的性能的影响。我们通过广泛的模拟验证我们的模型。结果表明，对于较低的E T 交付延迟与节点合作无关。
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