The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
First, according to characteristics of mobile social environment, by using optimization models based on similarity degree and interaction degree respectively, the optimal correlated users can be selected for analyzing two main factors of a target user's behaviors (i.e. long-term habits and short-term influences); furthermore, an adaptive update strategy based on fuzzy theory is proposed to describe...
Recently, the rampant enlarging of networks scale have led to a growth in the number of mobile base stations. The research of mobile base stations is more meaningful under this circumstance. In the study of base station distribution, the distribution of base stations in many areas is subject to Poisson distribution. This paper takes three large cities in Britain as an example to explore whether their...
With the development of Mobile and Wireless Network technology, Mobile learning (M-learning) becomes a focus after E-Learning. How can the farmers get requisite information of agricultural production by mobile phone? In order to solve this problem, the personalized mobile information system for the farmers has been designed and developed based on Ontology. It consists of four functional modules: information...
Recently, sink mobility is introduced to balance energy consumption in WSNs. However, mobile sinks are required to inform potential sources about their new location information whenever necessary. Frequent location updates can cause both increased transmission traffic and rapid energy consumption. This paper presents a novel data-gathering scheme for WSNs with a single mobile sink to minimize the...
This paper proposes a robust and precise localization system for mobile robots with the aid of Radio Frequency Identification (RFID) technology and the Markov Chain Monte Carlo (MCMC) optimization algorithm. By integrating the RFID module, RFID tags, a mobile robot and an off-board computer together, the localization system uses MCMC to analyze RFID signal information and get optimized mobile robot's...
Internet of Things involves many key technologies, one of which is wireless sensor networks. Based on the classical LEACH clustering algorithm combined with the characteristics of hybrid network topology and for saving node energy consumption and node mobility, this paper puts forward a new improved LEACH routing algorithms-Mobile Node selected cluster method and dynamic node routing algorithms (Dynamic...
Mobile Ad hoc Network (MANET for short) is a new type of wireless network. It is a self-configurable and autonomous network which consists of several independent nodes, and is different from the traditional wireless network because its characteristic of non-central administration. Those nodes participate with each other to share the network responsibilities. (t, n) threshold secret-shared cryptosystems,...
In this paper, we proposed a new dynamic topology- adaptive broadcast cluster network topology structure, based on hybrid-like network of wireless sensor networks. This network topology structure can well-suited to mobile nodes in wireless sensor networks system. The Simulation result in this paper shows that the network topology has better viability and dynamic in nature.
In highly mobile pure ad-hoc wireless mesh networks, fast rerouting within low routing discovery delay is a mandatory requirement for routing algorithm to support interactive applications such as VoIP. Also, the communication overhead should be thwarted when networks grow to a large scale. We propose a tree-based routing algorithm - TBRA to facilitate such two goals. On one hand, TBRA has very low...
In highly mobile large-scale vehicular ad-hoc networks, routing protocols must be fast and efficient in terms of low routing discovery delay and communication overhead to support the applications such as car talk. Such requirement becomes more difficult to achieve when inducing security enhancement to tackle the authentication of routing messages. In this paper, we propose a lightweight (fast) secure...
This paper presents the results of wideband channel measurement campaigns conducted in vehicle environment. A frequency range of 0.5 - 16 GHz was measured using a vector network analyzer. Typical in-vehicle scenarios, including line-of-sight (LOS), non-line-of-sight (NLOS), different distance, impact of passengers, were considered. The objective of this work is to obtain a better assessment of the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.