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With the rapid development of Wireless Ad Hoc and Sensor Network (WASN), large number of sensors need large number of IP addresses to connect to the Internet. Therefore, how to implement IPv6 in WASN becomes a critical research issue. In addition, because WASN is designed to run for long periods of time, how to reduce power consumption is another important research direction. For WASN, in which some...
Recent advances in micromanufacturing technology have enabled the development of low-cost, low-power, multifunctional sensor nodes for wireless communication. Diverse sensing applications have also become a reality as a result. These include environmental monitoring, intrusion detection, battlefield surveillance, and so on. In a wireless sensor network (WSN), how to conserve the limited power resources...
With the explosion of smartphone popularity in recent years, people are familiar with mobile tourism guides. Users often spend much time to look for travel information on the Internet without user interaction on relevant websites. Generally, the tour guides lead tourists to interact with travel attractions in a group trip. This study applies an interactive model to traveling while tourists join a...
The packet-switched NGN (Next Generation Network) architecture allows users to access multimedia services via the Internet anytime and anywhere. Through the core IP Multimedia Subsystem (IMS), NGN can provide multimedia services, such as voice, video, data and messages over heterogeneous networks. However, for high-quality services in practical environment, the performance and QoS (Quality of Service)...
Numerous researches about Mobile IPv6 (MIPv6) have been proposed recently and the handover delay of the Mobile Nodes (MNs) among different networks is surely a worthy noticing issue. There are three major reasons for the MIPv6 handover delay: Movement Detection, Duplicate Address Detection (DAD), and Binding Update (BU), in, which DAD occupies most of the MIPv6 handover delay and influences real-time...
Nowadays, with the wide establishment of IEEE 802.11, more and more people use Wi-Fi to surf on the Internet. Due to the convenience and mobility of the mobile devices, a number of mobile users have been increasing greatly. For real-time video and VOIP have attracted much attention, the delay time of handoff is the most important issue for the service. In order to provide high-speed service with low...
In recent years, the issue of Vehicular Ad-Hoc Network (VANET) has received great attention, and more and more VANET-related researches have been brought up. Generally speaking, the biggest difference between VANET and traditional Ad-Hoc is the velocity of carriers because in VANET, the velocity of vehicles the carriers is much higher than that of the carriers in traditional Ad-Hoc. Furthermore, it...
In ad hoc networks, one inevitably serious problem is that the power of battery is not permanent which explains that portable devices perhaps shut down suddenly if the power of hardware is die out. Hence, how to decrease the power consumption is an important issue in ad hoc networks. With the development of wireless technology, mobile devices are not only permitted of transmitting voice, but also...
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