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In wireless sensor applications such as disaster recovery and military actions, the behavior of mobile sinks is characterized by group features. A number of mobile sinks move together in a group manner, and mobile sinks in the group stay closely and randomly move within a geographically restricted region. Recently, many communication schemes have been suggested to reflect the properties of the mobile...
As mobile technology advances, more services on peer-to peer(P2P) systems in mobile ad-hoc networks are available in various forms. Recently double-layered P2P systems have been proposed to reduce the network traffic. Peers in a double-layered system are classified into super peers in the upper layer and sub-peers in the lower layer. One of the double-layered systems, called the MOB(MOBility) system,...
Geographic routing has been considered as an efficient, simple, and scalable routing protocol for wireless sensor networks since it exploits pure location information to route data packets toward a static sink. Recently, a number of research works have shown that mobile sinks can achieve high energy efficiency and load balance than static ones. To support sink mobility, the location of a mobile sink...
In wireless sensor networks, the studies that support sink mobility without global position information exploit a Backbone-based Virtual Infrastructure (BVI) to avoid the routing structure construction per each mobile sink by full network flooding. The BVI approach typically considers one-hop clusters and a backbone structure-based tree configured by the cluster heads (CHs). For data dissemination...
The focus of this letter is to derive a scaling law for the ene-to-end delay of wireless random networks under node mobility, where n nodes randomly move with the speed of v. To that end, we apply the cover time analysis and relate it to the delay scaling law. As a result, we derive that the mean delay per S-D pair as ??(n) or ??(??(n)/v), and the worst case delay is ??(n log n) or ??(??(n) log n/v),...
In expanded service area of wireless mesh network to support mobility of the mobile station research is recognized as an important issue. The wireless body area networks promise to revolutionize health monitoring. Due to the mobile station move frequently to changing the path, data loss and network performance degradation are often occur, such as the service broken. In the existing research of support...
Wireless mesh networks (WMNs) enlarge the wireless coverage area by interconnecting relatively stationary wireless mesh routers (MRs). Under the coverage, mobile nodes (MNs) can move around and connect to nearby MRs. Mobility management is one of the most significant management services for WMNs. In this paper, a hand-off management structure based on OLSR protocol is presented. In this structure,...
The topology control for guaranteeing QoS requirements of nodes might not have any solution because of the limited resources of nodes, e.g., the maximum transmitting power. In this case, the mobility of nodes can compensate for the shortage of resources and then makes a topology feasible. We propose the energy efficient mobility control algorithms for the QoS topology control with the least movement...
Recently, large-scale IP-based sensor technology (e.g., 6LoWPAN) is emerging for new requirements such as availability, manageability, survivability, stability, and mobility in sensor networks. 6LoWPAN standards are being developed to work on IPv6 over IEEE 802.15.4 specifications. 6LoWPANs can support various topologies like mesh as well as star. Mesh topologies imply multi-hop routing, to a desired...
Typically, sensor networks consist of fixed sensor nodes. Sometimes, creating such a fixed sensor networks could be a daunting task. Sensor nodes assume deploying a stationary sensor network over a dangerous area such as a battlefield. Even if an advanced method to make the deployment safer is used, diverse element will cause a coverage holes. Even though perfect coverage can be achieved initially,...
Fast Mobile IPv6 has been proposed to reduce latency and packet loss inherent to the handover process. However the previous research did not consider the packet loss according to the tunnel management for Fast Mobile IPv6. In the procedure of binding updates and fast binding updates, a mobile node has to establish new tunnels after receiving binding acknowledgement messages. While completing the tunnel...
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