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Currently, PIM-SM is the most deployed multicast routing protocol. It is fully receiver driven and does not give any feedback information when a tree building/maintaining failure occurs or when the requested resource is unavailable. After a detailed analysis of the PIM behavior, we propose a simple feedback mechanism reporting about such unreachabilities/failures. It is suitable for informing downstream...
This paper discusses the QoS topology control problem with consideration of power control and rate adaptation in wireless mesh networks. Our task is to construct a routing forest (a set of trees rooted from the gateway nodes), configure the transmission power of each node, such that the constructed network topology can meet the delivery threshold for all nodes and the system throughput is maximized...
In this paper, we present hybrid mesh tree, a new scatternet formation algorithm for Bluetooth ad hoc networks. The hybrid mesh tree constructs a mesh-shaped topology in one dense area and extended by tree-shaped topology in the other areas. First, hybrid mesh tree uses a designated root to construct a tree-shaped subnet and propagates a constant k in its downstream direction to determine new roots...
The traditional client-server architecture widely adopted on the Internet is not adequate to meet the increasing user loads and bandwidth demands in live streaming systems especially for multimedia content delivery. Peer-to-peer P2P) overlay networks provide excellent system scalability and high resource utilization, which make it an attractive solution to this problem. This paper considers a hybrid...
The accumulation of high-throughput genomic and proteomic data allows for the reconstruction of the increasingly large and complex metabolic networks. In order to analyze accumulated data and reconstructed networks, it is critical to identify network patterns and evolutionary relations between metabolic networks. But even finding similar networks becomes computationally challenging. Alignment of the...
In this paper, we proposes a multi-gateway nodes data collected routing algorithm based on load balancing(TBLB algorithm) and energy balance, robustness, data forwarding and anti-interference etc, which is multi-gateway nodes-based in wireless sensor network. This algorithm fully takes into account the problem of excessive power consumption when it serves as the data forwarding task, to reduce node...
The ever-increasing requirements for performance, flexibility, and robustness are imposing a severe strain on the Internet's stagnated architecture. Network virtualization arises as a potential solution for improving the current situation by letting multiple networks with different requirements, architectures and protocols to coexist and share the same infrastructure in an independent way. These advantages...
A Wireless Sensor Network (WSN) is typically depicted as a distributed resource constrained platform for supporting novel pervasive applications. A possible approach is to develop applications over WSNs by resorting to mobile agent frameworks that are aimed to minimize resource costs and memory allocation. In this context, network topology is a major issue to be considered for resource optimization:...
Routing delivery is one of the key techniques in mobile ad hoc network, which involves many aspects such as topology update, routing exchange and so on. In this paper, we firstly apply routing tree to describe the complete topology of ad hoc network, and then store the information of routing tree into every node's routing table. Sparse routing tree, as a pruned tree, is used to exchange topology information,...
Traditional network identification methods require cooperation of all nodes, thus they cannot identify the topology of the networks where some non-cooperative nodes exist. Although the tomography based network topology identification methods require no collaboration of intermediate nodes, they suffer from high algorithmic complexity and heavy network payload. In this paper we propose a novel tomography...
In this paper, we propose a method to reduce the routing overhead in DSDV (Destination-Sequenced Distance-Vector) networks. The proposed method benefits from the nature of DSDV, such as loop-free and shortest routing path, but alleviates the problem of control message flooding when the network topology changes. Given a destination node in a DSDV network, there exists a spanning tree using the destination...
Aiming at constructing a delay and delay variation bounded Steiner tree in the real-time streaming media communication, we discuss in this paper a multicast routing algorithm based on searching a directed graph (MRASDH).In the construction of the multicast tree, there always exist some nodes and links in the network topology that do not affect the outcome of the tree constructed. Therefore, based...
As a traditional agricultural country, shortage of water resource has been a critical issue for China. Intelligent irrigation is a promising solution to improve the irrigation efficiency. ZigBee is an emerging wireless communication technology based on IEEE 802.15.4, which has been widely applied in commercial, industrial, medical and agricultural areas. There are many merits to use ZigBee for agricultural...
Many-to-many multicast can be widely used in computer and communication networks supporting various continuous multi-media applications. This paper assumes each user is both a source and a receiver as well as a terminal in many-to-many multicasting. Under this assumption a many-to-many multicast tree appears as a terminal Steiner tree (TeST). This paper uses a heuristic idea of under a fixed TeST...
Self-management of tree overlay networks for distributed applications is the challenge this paper addresses. Eight local adaptation strategies are introduced based on which autonomous self-organized agents establish connections that build and maintain a tree topology. Quantitative and qualitative experimental evaluation illustrates and compares the effects of adaptation strategies in the resulting...
In a wireless sensor network (WSN) with specially deployed cluster heads (CHs), association relation between sensor nodes and the CHs is important as it affects the radio resource allocations, which further determine the overall network throughput, energy consumption, and other performance. In a lot of cases, the CHs are placed in random locations, and strong overlapping may exist between their coverage...
This paper discusses an approach for distributing a large number of multimedia (video) titles to users located at the leaves of a tree network. The proposed approach is to build multicast trees, over which the content files are sent to user disks, followed by delayed local playback of the content. The work concentrates on exact and heuristic methods for an efficient tree packing in several download...
This paper studies robust adaptive flocking control of multi-agent systems with nonlinear dynamics. In this setting, the coupling weights, perturbed by asymmetric uncertain parameters, are dynamically updated while the network topology for velocity is fixed. By designing the coupling weights according to the distributed local information on the linked nodes, flock formation can be reached if the network...
As the infrastructure-centric model of peer-to-peer streaming, recent overlay construction schemes compose a hierarchical topology of peers by grouping them into clusters. There is a server in each cluster that receives data from the source and relays it to its cluster members. In this paper, we propose an alternative infrastructure-centric peer-to-peer framework called BAHMO that constructs a hierarchical...
Mobile Ad hoc Network (MANET) is the cooperative engagement of a collection of wireless mobile nodes without the support of any centralized access point or existing infrastructure. The use of virtual topologies is a good alternative to build wireless multi-hop networks. It aims to maintain a topology that optimizes broadcasting or network performances. The problem is to determine an appropriate topology...
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