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This paper present a Data Dissemination strategy based on Time Validity (DDTV) to deal with time-sensitive contents in opportunistic networks. Time sensitivity refers to the constraint that the content must be delivered to the destinations within a given time frame called time validity. A content delivery fails when the time constraint cannot be satisfied. Thus, DDTV exploits user's mobility and historical...
In This paper we proposed an improved routing metrics for wireless sensor networks (WSNs) based on Hybrid Energy Storage System (HESS) which merges Super capacitor (SC) and a Rechargeable Battery (RB). The proposed routing scheme assigns different metrics considering not only residual energy, harvesting rates and expected path length of next hop, but also the potential of the future hops. Simulations...
In WSNs, accidents like traffic congestion and sensor node running out of energy may occur frequently. These accidents are usually geographically localized, resulting in some groups of nodes unusable temporarily or even forever, which are called sensitive clusters in this paper. Although the data collection methods have been intensively studied, how to dynamically optimize the routing to bypass the...
Wireless sensor network (WSN) is one of popular research issues, and ZigBee is an important protocol for WSN. Traditionally, the device addresses in WSN are given by a Distributed Address Allocation Mechanism (DAAM). Although DAAM has better extensibility, this network topology resulted by DAAM did not consider fast routing between nodes. Although binary tree topology benefits a faster packet routing...
In this paper, we propose a low latency routing algorithm for structured peer-to-peer network. The LLCHORD (a low latency chord routing algorithm for distributed hash tables) protocol is used in the routing query message to the destination. Previous protocol, such as Chord, already provides a scalable query latency of O(log(N)), where N is the number of nodes in peer-to-peer network. But the latency...
Though the peer-to-peer network based on distributed hash table have scalability and availability features, but most of the distributed hash tables lack the support for the atomic data accessing, this ability is important to build data structures on distributed system. This paper gives the design and implementation of an atomic accessible mutable distributed hash table - FamDHT. The FamDHT use the...
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