The medium access control (MAC) protocol design of underwater acoustic sensor networks (UWASNs) faces many challenges: the power limitation at nodes, long propagation delay, low data rates, etc. These challenges of underwater acoustic channels result in the unsuitable usage of terrestrial networks MAC protocol in UWASNs. Moreover, the long propagation delay causes a serious problem for the MAC ...

One of the major component in a QoS-enabled network is active queue management (AQM). Over the last decade numerous AQM schemes have been proposed in the literature. However, much recent work has focused on improving AQM performance through alternate approaches. This study focuses on an unbiased comparative evaluation of the various proposals. The evaluation methodology adopted is the following...

Delay Tolerant Network (DTN) is a promising technology which aims to provide efficient communication between devices in a network with no guaranteed continuous connectivity. Most of the existing routing schemes for DTNs achieve message delivery through message replication and forwarding. However, due to the lack of contemporaneous end-to-end communication path, designing routing protocols that ...

Delay Tolerant Network (DTN) addresses challenges of providing end-to-end service where end-to-end data forwarding paths may not exist. Security and privacy are crucial to the wide deployments of DTN. Without security and privacy guarantees, people are reluctant to accept such a new network paradigm. To address the security and privacy issues in DTNs, we in this paper have discussed the various...

Delay Tolerant Networks (DTNs) focus on scenarios where most of the time contemporaneous end-to-end paths between source and destination do not exist, and mobility should be explored for message delivery. In this paper, we classify the common scene by the regularity of the nodes into six scenarios, then compare the performance of common DTN routing protocols at different scenarios by simulation...

Typical video applications may need a higher bandwidth and/or higher reliability connection than that provided by a single link in current or emerging wireless networks. We propose to employ path diversity to provide higher bandwidth and more robust end-to-end connections than that affordable by a single path. Under this transport environment, two viable strategies for video coding are multiple...

Delay and Disruption Tolerant Networks (DTNs) adopt the concept of intermittent networks that may suffer frequent disconnections, with the possibility of never have a connectivity end-to-end between the source and destination in a given period of time. Therefore, the design of protocols for those networks becomes a unique challenge. In this article, will be treated the routing for delivery anyc...

The use of wireless links causes several problems for TCP connections. Among them are high loss rates, high delay latency, high delay jitter, reverse path contention, dynamic link capacity, and link capacity dependent on transmission rate. These problems can be ameliorated through the use of modifications to TCP, with or without support from a router in the network. Solutions fall into two gene...

This paper proposes a novel scheduling algorithm using multi-channel and multitimeslot with the objective of reducing the end-to-end (e2e) delay in a tree-based wireless sensor network. The algorithm exploits a staggered timeslot allocation in terms of e2e paths, rather than the one with individual branches. It also increases simultaneous data transmissions. The proposed algorithm is shown to b...

This paper describes a Bacteria-based Nanonetwork for communication between eukaryotic cell sized nano devices. The communication is achieved by the exchange of DNA molecules which are transported by bacteria guided by chemotaxis. First, the modules of the network are described and all the biological phenomena that support the basic communication steps are explained in detail. Then an analytica...