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A connected dominating set used as a virtual backbone in ad hoc networks has the advantage of reducing both communication overhead and power consumption. Many virtual backbone construction methods have been proposed in recent years, but a few of them focus on the maintenance issue. Since the topology changes caused by node mobility or switch off may dramatic in mobile ad hoc networks (MANETs) or wireless...
In mobile ad hoc networks (MANETs), the maximum transmission radius is generally used for transmission. The advantage is that each mobile node can communicate with more mobile nodes within the transmission range and packets can reach the destination rapidly in fewer hops. However using the maximum transmission radius will induce high power consumption. We proposed the Hierarchical Cell Relay (HCR)...
Multimedia applications in wireless communication have shown notable increases over recent years. Specifically, Quality of Service (QoS) has become an important support mechanism in the context of a variety of applications which utilize network resources. The IEEE 802.16 standard for Wireless Metropolitan Area Networks (Wireless MAN) provides a complete QoS control structure designed to enable flow...
Conventional layered network architecture schemes partition sensor nodes into layers based on their distances (i.e., hop-count) from the sink, forwarding gathered data through those nodes with few hop-counts to reduce the energy consumption of a node. Nevertheless, a node that connects with too many nodes in its neighbor layer still incurs significant amount of data forwarding. This node generally...
Many location-based routing protocols have been developed recently, and have been demonstrated to be scalable and efficient for packet routing in mobile ad hoc networks. Using location-based routing requires that a node obtains the node position with which it wants to communicate. This task is generally achieved by a location service. This work presents a novel routing protocol, called hierarchical...
Multicasting in mobile ad hoc networks (MANET) is an efficient method for group communications that has received considerable attention. However, developing a scalable, robust and efficient multicast method in MANET is difficult owing to group membership management and the ability to maintain a multicast structure over a dynamic topology. This work presents a novel Robust Mesh-based Multicast Protocol...
Gateways act as bridges for forwarding data packets between integrated mobile ad-hoc networks (MANETs) and the Internet. Mobile nodes in MANETs must discover available gateways to gain access to the Internet. This study presents an adaptive gateway discovery scheme that balances efficiency and overhead by limiting the flooding scope of gateway advertisement messages. The proposed scheme dynamically...
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