Publications (7)0.86 Total impact
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ABSTRACT: Data gathering is an essential operation in wireless sensor networks. For periodic data gathering applications, each sensor node has data that must be sent to a distant base station in a round of communication. Due to the limited battery power of sensor nodes, each sensor node transmitting its sensed data to the base station directly significantly consumes its energy. This work presents a hierarchical ring-based data gathering (HRDG) scheme for dense wireless sensor networks. A hierarchical grid structure is constructed, and only some sensor nodes are elected as grid heads for gathering data, subsequently reducing the total energy consumption per round. Grid heads are then organized into hierarchical rings to decrease the transmission delay of a round. The proposed HRDG scheme focuses on reducing the energy × delay cost in a round of data gathering. Moreover, the energy × delay cost of HRDG is analyzed. Simulation results indicate that the proposed HRDG scheme outperforms other data gathering schemes in terms of the number of rounds, the energy × delay cost and coverage ratio.Wireless Personal Communications 08/2013; 64(2). · 0.43 Impact Factor
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ABSTRACT: A mobile ad hoc network (MANET) is a distributed wireless network. The characteristics such as free mobility, self configuration, and fast deployment make MANETs suitable for various tasks. Multicasting can efficiently support a variety of applications and services. Most of existing multicast routing protocols in MANETs consider only one source in a multicast group and become inefficient when the protocol is extended to multi-source multicasting. In this paper, we propose a cluster-based multi-source multicast routing protocol to provide efficient multicasting in the multi-source multicast environment. The proposed shared forwarding cluster and cluster-based routing preserve forwarding efficiency as well as robustness. Simulation results show that the proposed protocol maintains the delivery ratio without losing efficiency in the multi-source multicast environment. KeywordsMobile ad hoc networks–Multicasting–Routing–Multi-source multicasting–ClusterWireless Personal Communications 04/2012; 57(2):255-275. · 0.43 Impact Factor
- Wireless Communications and Mobile Computing. 01/2012; 12:71-84.
Conference Proceeding: Energy efficient hole bypassing routing in wireless sensor networks[show abstract] [hide abstract]
ABSTRACT: In wireless sensor networks with holes(obstacles), to identify holes and deliver data packets efficiently are challenging issues. Most existing researches require sensor nodes to exchange messages multiple times for hole identification and thus depleting energy of sensors. In some researches, even with the assumption of knowing the information of the hole, due to the lack of efficient hole bypassing routing considerations, sensors still consume excessive energy for hole bypassing and data packets may still fail to be delivered to the destination. In this paper, we design an effective hole identification mechanism and propose efficient hole bypassing routing scheme in wireless sensor networks with holes. With the proposed scheme, data packets are able to bypass holes and be delivered to the destination along a shorter path. Simulation results demonstrate that our scheme is more energy efficient and has a shorter average path length.Computer Science and Information Technology (ICCSIT), 2010 3rd IEEE International Conference on; 08/2010
- J. Inf. Sci. Eng. 01/2008; 24:1409-1428.
Conference Proceeding: A Cluster-Based Coverage-Preserved Node Scheduling Scheme in Wireless Sensor Networks[show abstract] [hide abstract]
ABSTRACT: Wireless sensor networks consist of a large number of low-power, small-scale sensors with limited processing and communication capabilities. Such networks are usually applied to gather data from interested area or specific environment and deliver to remote users for analyzing or monitoring. Because of sensing devices are usually powered by batteries, it is a great challenge to meet the performance of long system lifetime required by different applications under limited power. In the densely deployed sensor networks, the area or data sensed by neighboring sensors may overlap. In recent researches, coverage preserved node scheduling has been proposed to conserve power and provide sensing reliability. By selecting appropriate sensors into sleep state, the system lifetime can be extended without losing coverage. In this paper, we propose a duster-based coverage-preserved node scheduling scheme. We divide sensors into clusters and group cluster members into sponsor sets based on neighbor information. The proposed approach distributes the workloads among sponsor set nodes and ensures sufficient coverage as long as possibleMobile and Ubiquitous Systems: Networking & Services, 2006 Third Annual International Conference on; 08/2006
Conference Proceeding: An efficient multi-source multicast routing protocol in mobile ad hoc networks[show abstract] [hide abstract]
ABSTRACT: Mobile ad hoc networks are organized by a collection of wireless devices. Any pre-established wired or wireless infrastructure or centralized administration is unnecessary. Thus, ad hoc wireless networks are particularly useful in regions such as battle-fields or disaster areas. There are numerous applications, such as video conferencing, distance learning and video on-demand relay on multicast routing. Most existing multicast routing protocols in ad hoc networks consider only one source in a multicast group, resulting in large overhead when the system is extended to multi-source multicasting. In this paper, we propose a cluster-based multi-source multicast routing protocol to provide efficient multicasting in the multi-source multicast environment. Simulation results show that the proposed protocol generates low overhead without dropping the delivery ratio in the multi-source multicast environment.Parallel and Distributed Systems, 2005. Proceedings. 11th International Conference on; 08/2005