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The emergence of Wireless Sensor Networks (WSNs) applications such as localizing, tracking, surveillance, speedometers, and so on, synchronizing sensor motes' clocks is essential in WSNs. Thus, many time synchronization protocols are proposed in recent decade to get network wide synchronization. Each of those protocols strives to get a good precision in different ways. This paper aims to review some...
In peer-to-peer (P2P) applications, a scalable group of multiple peer processes (peers) are required to cooperate with each other. In this paper, we discuss a two-layered heterogeneous hybrid time (THHT) protocol which takes advantage of the linear time (LT) and physical time (PT) to causally order messages in a scalable heterogeneous group. In a heterogeneous type of group, the clock accuracy of...
In peer-to-peer (P2P) applications, a group of multiple peer processes (peers) are required to cooperate with each other. In this paper, we discuss a heterogeneous hybrid time group communication (HHT) protocol which takes advantage of the linear time (LT) and physical time (PT) to causally order messages in a scalable heterogeneous group. It depends on accuracy of each physical clock and minimum...
In peer-to-peer (P2P) applications, a group of multiple peer processes (peers) are required to cooperate with each other in a distributed manner. Messages sent by peers have to be causally delivered to every peer in a group. Due to the message overhead O(n) for the number n of peers, the vector clock cannot be used to causally deliver messages in a scalable group. On the other hand, the linear clock...
In distributed peer-to-peer (P2P) applications, a group of multiple peer processes (peers) are required to cooperate with each other. Messages sent by peers have to be causally delivered. In this paper, we discuss a scalable group communication protocol for a group of multiple peers in P2P overlay networks. Due to the message overhead O(n) for the number n of peers, the vector clock cannot be used...
It is important to identify P2P flows accurately for effective network planning and design, security insuring, network management, network behavior understanding and so on. Firstly, an algorithm for identifying listening port of P2P host (LPIA for short) is proposed. Secondly, a heuristic algorithm of P2P flow identification (PFIA for short) is presented, which combines P2P host's listening port,...
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