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.
We originally design a mechanism of spectrum sharing for cognitive radio networks (CRNs), which can protect secondary users from dropping call and improve the user capacity compared with traditional scheme. Continuous time Markov process is adopted for modeling interactions between primary users and secondary users in proposed mechanism. Based on quasi-birth and death process (QBD) theory, we present...
In cognitive radio networks, channel reservation is an effective measure to solve the trade-off problem between dropping probability and blocking probability. Because of the integer nature of channel, most of the current reservation schemes were based on integer. However, the number of reserved channels of integer reservation schemes can't be adequately adjusted as a result of optimizing the system...
Cognitive Radio Networks (CRNs) deal with opportunistic spectrum access in order to fully utilize the scarce of spectrum resources, with the development of cognitive radio technologies to greater utilization of the spectrum. Now-a-days Cognitive Radio (CR) is a promising concept for improving the utilization of limited radio spectrum resources for future wireless communications and mobile computing...
Spectrum sensing is one key enabler towards opportunistic spectrum access in cognitive radio networks. Such scenarios allow cognitive users (a.k.a. secondary users) to access some licensed spectrum band as long as they do not interfere with the licensed (or primary) users. The main goal is to achieve an efficient and utmost access to the otherwise underutilized spectrum resources while still guaranteeing...
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.