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.
Wireless Sensor Networks (WSNs) is a key area of new investments and investigations. Quality of Service (QoS) is an important requirement for this networks. In this survey, we firstly introduce WSNs briefly. Then, We propose the existence of Qos issue on both network layer and MAC layer, as well as the existence of solutions, especially to MAC layer. Finally, we propose a network topology and a MAC...
In this paper, we briefly describe the wireless sensor network(WSN), and highlight the design of RF antenna with a gain based on nRF905 chip, then complete an intelligent greenhouse monitoring system for agricultural greenhouse temperature based on WSNs. Finally, we confirm the feasibility of the system design through some tests.
Routing protocol as one key technologies of wireless sensor networks has been a hot research. Because the applications of wireless sensor networks everywhere, it is impossible that there is a routing protocol suitable for all applications. In this paper, the applications are divided into five categories and illustrated respectively. Then the common routing protocols that DD, LEACH, SPEED, GEAR and...
We design a kind of wireless sensor networks gateway nodes based on IP2022 and nRF905; also, the industry application of nodes designed is studied, the thought of the industry application is given out.
Wireless sensor network consists of large number of sensor nodes randomly distributed in some regions. Each node has a limited energy supply and generates information when some events that need to be communicated to a sink node occur. It has been proved that the nodes closer to the sink node will use up their energy more quickly, as a result, the network lifetime will be affected, some bad consequences...
Analyzes the engineering environment in WLAN based on ECC, this paper describe a kind of dual signature scheme using multi-element authentication method by choosing appropriate ECC parameters. This scheme strengthen authentication for all the entities in WLAN, any party's identity should be checked by others when associating. The analytical results indicate that this scheme not only enhance the security...
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.