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In wireless sensor networks, studies in terms of data dissemination to individual mobile sinks traditionally rely on a strategy that consists of a virtual infrastructure to service current location of the sinks and per-sink foot-print chaining to support local mobility after location update. To adapt the strategy for supporting mobile sink groups, it might be simply considered to use a representative...
Geographic routing has been considered as an efficient, simple, and scalable routing protocol for wireless sensor networks since it exploits pure location information instead of global topology information to route data packets. Geographic routing requires the source nodes to be aware of the location of the sink nodes. How source nodes efficiently obtain the sink location information has been merely...
We propose a communication mechanism to support mobility of loosely coupled mobile users in sensor applications with multiple sources. First, we examine problems for mobility support of the loosely coupled users in wireless sensor networks with multiple source nodes, and then study the dynamic sink communication model to support a mobile user with sink-oriented tree based data gathering from multiple...
We propose a communication mechanism to support mobility of loosely coupled mobile users in sensor applications with multiple sources. First, we examine problems for mobility support of the loosely coupled users in wireless sensor networks with multiple source nodes, and then study the dynamic sink communication model to support a mobile user with sink-oriented tree based data gathering from multiple...
Typical information communication for large-scale wireless sensor networks may be performed in a data-centric routing manner. The data-centric routing manner well matches the publish/subscribe communication paradigm operated by a contention-based networking. The publish/subscribe paradigm provides decoupling properties for data-centric networking: space, time, and synchronization decoupling. For large-scale...
In large scale Internet network, the research in area of event detection and report publish/subscribe communications paradigm is being progressed. Data-centric is the basic characteristic of data transmission mode of the publish/subscribe communications paradigm. Such characteristic coincides with the wireless sensor network. The publish/subscribe communications paradigm performs task in manner of...
Typical multicasting saves efficiently both bandwidth and energy in static wireless sensor networks. Such benefits make the research of multicast which is a transmission from a data source to multiple destinations (sinks), actively. Most of these researches focused on the way how to make efficient multicast tree only, they are weak for supporting mobile sinks. In practical applications, sinks move...
In delay-tolerant wireless sensor networks, reporting data from a source node to a sink may be delayed to satisfy certain criterions, for example, high energy-efficiency, low algorithm complexity and so on. Sensed data in such networks accumulate on a sensor node during time delayed. It means that even a single failed node may cause a massive-data loss. This paper proposes a backup scheme to minimize...
This paper addresses issues for tracking and monitoring continuous objects, such as poison gas, biochemical, and chemical liquid in wireless sensor networks. These continuous objects are quite different from the individual objects, such as people, animals, and vehicles in that they are continuously distributed across a region and usually occupy a large area. Accordingly, they are detected and sensed...
In many sensor applications such as intruder tracking, reliable data dissemination is necessary. Existing studies in ad hoc networks generally apply end to end control for reliability. This approach however could not adapt to wireless sensor networks (WSNs). Existing studies in WSNs generally apply multipath approach for reliability. This approach however only increases probability but could not assure...
In wireless sensor networks, groups of mobile users interested in equivalent information could be classified into two categories according to existence of direct communication channel among the users: 1) loosely coupled user group and 2) tightly coupled user group. The loosely coupled group means that a mobile user should communicate with others via a wireless sensor network for querying, gathering,...
Geographic routing has been considered as an efficient, simple, and scalable routing protocol for wireless sensor networks since it exploits pure local location information instead of global topology information to route data packets. Geographic routing requires the sources nodes to be aware of the location of sinks. Most existing geographic routing protocols merely assume that source nodes are aware...
Many researches in wireless sensor networks have been exploited a geographic routing to effectively disseminate data between sinks and sources. However, the geographic routing needs that the sinks and the sources are aware of location information of each other. To know the location information, there have been proposed two manners. The first manner is a sink-initiated location information flooding...
Most existing routing protocols on the object detection and tracking in sensor networks concentrates on finding ways to detect and track one or more individual objects, such as people, animals, and vehicles, and not many protocols have been done on detecting and tracking continuous objects, such as poison gas, biochemical, and chemical liquid. These continuous objects are quite different from the...
Most existing geographic routing protocols on sensor networks concentrates on finding ways to guarantee data forwarding from the source to the destination, and not many protocols have been done on collecting and aggregating data of sources in a local and adjacent region. However, data generated from the sources in the local and adjacent region are often redundant and highly correlated. Accordingly,...
Geographic routing has been considered as an energy efficient and simple routing protocol for wireless sensor networks. It utilizes only geographical location information without global network structures to route data packets. To take these advantages of geographic routing, a source node should be aware of the location of a sink node. Methods that the source node efficiently obtains the sink location...
In wireless sensor networks, existing location- based multicast protocols deliver data packets to group members through static data paths, using the location information of group members. Routing paths in the data delivery paths are never changed unless topology changes. Therefore, the nodes on the routing paths can be dead owing to continuous energy consumption and thus the lifetime of network might...
Many dissemination protocols on the mobility support in wireless sensor networks have been designed based on the assumption that the movement trace of sinks is random. However, the mobility of the sinks in many applications, for example, the movement traces of a soldier on operation in a battle field or a firelight on rescue operation in the disaster area, can be determined in advance since they move...
Geographic routing has been considered as an efficient, simple, and scalable routing protocol for wireless sensor networks since it exploits pure location information instead of global topology information to route data packets. Geographic routing requires the sources nodes to be aware of the location of the sinks. How can source nodes get sinks locations with low overhead is a difficult issue in...
Sensor networks are composed of a great number of sensor nodes. Since all sensor nodes are energy-restricted and hard to recharge, it is very important. However, the energy consumption may significantly increase if mobile sources or sinks exist in sensor networks. The reason is that the routing information for mobile sources and sinks needs to be update frequently for efficient data delivery. The...
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