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Admission control plays an important role in providing Quality of Service (QoS) guarantees for wireless mesh networks (WMNs). Multipath routing can improve network performance in reliability and load balancing. However, when the multipath routing are adopted in 802.11-based WMNs, the transmission with bandwidth assurance is facing rigorous challenges. In this paper, a novel joint design of multipath...
In Vehicular Ad-hoc Network (VANET), the multi-hop routing frequently breaks off, which has a negative effect on the reliability and transmission quality of the network. The paper proposes a new routing algorithm based on the geographical position, called Multi-Priority Opportunistic Directional Routing (MPODR). The algorithm improves the existing Opportunistic Directional Forwarding Strategy from...
Trade-off between energy-efficiency and reliability in wireless sensor networks is application dependent. Without the reliability, the extended lifetime of a network is of limited use. Due to the inherent correlation between reliability and congestion, it is necessary to reduce congestion to improve reliability. Existing congestion control algorithms in wireless sensor networks are reactive. They...
As wireless sensor networks are becoming more and more commercialized in many applications such as smart home network, building automation system, the needs for network scalability are increasing to support several hundreds of nodes and massive amount of data from them. In this paper, we propose the hierarchical network protocol (HNP) to provide the efficient communication, network reliability, and...
In view of the dense and complex space network topologies envisioned for the future, the management of congestion control is a prominent issue that deserves a particular attention. Given the challenging peculiarities of interplanetary environments, this paper focuses on the advantages offered by storage-based routing and on potentials of implementing Random Early Detection (RED) and Explicit Congestion...
The paper describes an optimization model which aims at minimizing the maximum link utilization of IP telecommunication networks under the joint use of the traditional IGP protocols and the more sophisticated MPLS-TE technology. The survivability of the network is taken into account in the optimization process implementing the path restoration scheme. This scheme benefits of the Fast Re-Route (FRR)...
The significant goal of routing protocol designs for wireless sensor networks is to improve the utilization rate of nodes and to prolong the lifetime of the network. But to a specific application, some other network performances, such as robustness, reliability, end-to-end delay, should be concerned and the conventional single path schemes may not be optimal to improve all these performances efficiently...
Broadcast presents a special challenge for wireless sensor networks (WSNs). In some situation such as time synchronization or building routing path, broadcasting messages must be securely transmitted to all nodes, but this process is subject to attack by adversaries. For example, an adversary may try to waste the battery power of intermediate nodes by forcing a compromised node to repeatedly rebroadcast,...
Mobile ad hoc network (MANET) is a self-configuring network that is formed automatically via wireless links by a collection of mobile nodes without the help of a fixed infrastructure or centralized management. The mobile nodes forward packets for each other, allowing communication among nodes outside wireless transmission range hop by hop. Due to dynamic infrastructure-less nature and lack of centralized...
In this paper some novel unicast protocols are developed for wireless sensor networks (WSNs) in order to ensure reliable packet transmission and maximize the lifespan at the same time. The optimal transmission energies and the optimal numbers for repeated packet transfers are derived which guarantee that the packets are received by the base station (BS) with a given probability, subject to achieving...
When using link-state protocols such as OSPF or IS-IS, forwarding loops can occur transiently when the routers adapt their forwarding tables as a response to a topological change. In this paper, we present a mechanism that lets the network converge to its optimal forwarding state without risking any transient loops and the related packet loss. The mechanism is based on an ordering of the updates of...
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