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We present a social-aware data forwarding scheme from a mobile source to a mobile destination in disruption tolerant networks. By incorporating any scattered network devices as temporal data storage for forwarding into parts of forwarding path, we aim to find the most effective relay path consisting of mobile-to-stationary and stationary-to-mobile relays. We combine the “carry-and-forward” scheme...
Wireless sensor network can be applied in several part of real world. For efficient use of energy, we propose hop by hop routing method with cluster heads. Cluster head is selected distributed manner in a same hop count. For high probability of upstream cluster head within transmission range, we use reduced transmission range to calculate hop count.
With the spread of mobile devices and development of the network, the user can use the data anytime anywhere. Especially, most users have become more sensitive to the quality of communication for the use of real-time video services. In this paper, we propose the SDN-based device-assisted network that improves network environment by device's feedback on the status of the network. When low network performance...
For mobile multicast, seamless handover and efficient network resource utilization should be achieved together. IP multicast protocol, however, lacks efficient mobility support as it is originally designed for wired networks. Meanwhile, Mobile-IP protocol can provide seamless mobility, but it is designed for unicast communication. Largely, there exist three solutions to glue these two protocols: Bi-directional...
Service discovery is an integral part in establishing an independent and self-organizing mobile ad-hoc network(MANET). In this paper a new distributed semantic service discovery scheme is proposed for MANET consisting of various mobile terminals. The proposed scheme based on the proactive routing protocol, Destination-Sequenced Distance Vector (DSDV), maintains the information on the network in the...
In wireless sensor networks, the existing real-time routing protocols for stationary sinks exploit a spatiotemporal approach, utilizing the delivery speed based on the end-to-end distance to fulfill the desired time deadline. This approach cannot be directly applied to a mobile sink since the distance can be varied depending on its movement. That is, the delivery speed cannot be determined without...
Proxy Mobile IPv6 (PMIPv6) is a network-based mobility management protocol. Mobile node (MN) does not participate in mobility-related signaling in PMIPv6. PMIPv6 can support multi-homing hosts with the help of virtual interface to perform inter-technology handover or to support flow mobility. However, a single virtual interface has the problem of swapping link-layer identifier (LL-ID) when the neighbor...
IoT (Internet of Things) network has recently emerged as a promising technology for various fields. To realize IoT service, access points are needed for heterogeneous terminals, sensors, actuators, laptop and mobile terminal. Wireless Mesh Network (WMN) could be a good solution. WMN consists of mesh points (MPs) that serve as a relay for other MPs for extension of network coverage. Reliable service...
In multi-robot systems, it is very important to maintain the network connectivity for cooperative behavior between robots. This paper describes a new method for deployment of wireless relay nodes. When applying rescue robots in building or underground city, connecting communication range is attenuated. In the paper, we divide multi-robot by leader robot, source robot, and relay robot. Using these...
To support a group of mobile sinks in wireless sensor networks, region-based routing protocols by using a single entity nature have been proposed. They periodically register the region location information of the mobile sink group and exploit flooding for the data delivery within the region. However, they have a data delivery failure problem for some sinks due to the asynchrony between the registered...
We propose a network infrastructure, called wise mobile sensor network (WiMoS), for supporting mobile WSNs in wide area. WiMoS has been developed to integrate conventional WSN systems and provide efficient location based services (LBSs), and has been designed by the open structure which has standard interfaces to support machine to machine (M2M) and internet of things (IoT). This paper introduces...
In tactical environment, MANET (Mobile Ad Hoc Network) has the network characteristics which make highly dynamic nodes, self-organized in fully-distributed style. Also, it has a harsh wireless channel environment compared to the commercial networks. In these channel environments, optimal path decision suited for Quality of Service (QoS) of transmitted tactical traffics must be performed by recognizing...
The ad-hoc network is a collection of wireless mobile nodes without any support of a stationary infrastructure. Due to the node's mobility and the network topology changes to be kinetic, the network disconnection occur frequently. This paper proposes a variation of the AODV protocol, which selects CORE nodes using path's accumulation information, and then establishes multi paths based on CORE-node's...
Though Dynamic Source Routing (DSR) is a popular on-demand algorithm designed to restrict the bandwidth consumed by control packets, the flooding of Route Request (RREQ) packets to find paths to a destination makes it difficult to apply DSR to wireless sensor networks (WSNs), which have tiny sensor nodes of limited memory and power. In this study, an angle-based multi-hop routing algorithm for mobile...
In wireless sensor networks (WSNs), the studies that support sink mobility without location information of sensor nodes traditionally establish a cluster-based virtual infrastructure. The cluster-based infrastructure consists of clusters involving sensor nodes and a shared tree organized by the cluster heads. In the studies, data dissemination from a source node to a mobile sink is performed via the...
In wireless sensor networks, a mobile sink group have geographically collective movement and member sinks of the group try to get same data to execute a communal mission. In order to support the mobility for such groups, it is needed to get the current location of a mobile sink group and then to offer the location to a source. Previous works for mobile sink groups provide region information of a sink...
There have been proposed many data dissemination protocols which use routing structures dependent on sinks or events in wireless sensor networks. However, as many mobile sinks and events exist in the network, such protocols are not energy-efficient due to frequent reconstructions of routing structures. Thus, in this paper, to provide the scalability and mobility of sinks and events, we propose new...
In this paper, we propose a novel on-demand routing protocol for IEEE 802.15.4-based low rate wireless mesh networks (LRWMNs). The novelty of our work is that the proposed routing algorithms enable route discovery packets (RREQs) to be semi-directionally flooded with respect to a source-destination pair in a distributed manner without either physical or virtual location systems. Instead, we use the...
In wireless sensor networks, many studies on data dissemination to individual mobile sinks traditionally rely on a strategy that consists of a virtual infrastructure to serve current location of the mobile sinks and a per-sink foot-print chaining mechanism to support local mobility after location update. To adapt the strategy for supporting mobile sink groups, it might be simply considered to exploit...
To improve handoff performance of the network-based Proxy Mobile IPv6 (PMIPv6), two types of enhanced handoff schemes have been presented; fast handover for PMIPv6 (F-PMIPv6) and route optimization handover (ROH). The F-PMIPv6 is committed to reduce handoff latency and is efficient to perform handoff signaling. However, it causes high packet delivery cost from additional tunneling at the LMA. The...
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