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.
This study proposes an analytical model and an effective scheme for the periodic broadcast on the control channel in vehicular ad hoc networks (VANETs). An improved Markov model for analysing the performance of the periodic broadcast in VANETs is established. Compared with the traditional two-dimensional Markov chain models, the improvement of our proposed model is achieved by the considerations of...
In order to improve the average performance of detecting spectrum holes for second user (SU), we propose the weighted energy detection method. In this paper, we firstly classify the detection situations into two modes. One corresponds to the situation that the primary user (PU) signal takes up the whole detection window if PU signal exists. The other corresponds to the situation that the PU signal...
In this paper, an algorithm called DPB (distributed probabilistic broadcasting) is proposed to increase the reliability of the emergent message transmission for safety applications in VANETs (vehicular ad hoc networks). In DPB which is based on probabilistic broadcasting, vehicles compute their own relay probability according to their own states at first, and then retransmit the message on basis of...
In this paper, we propose an integrated service-based handoff scheme with (ISBQ) and without queue capability (ISB) for the cellular and WLAN integration. The proposed handoff schemes take into account the different services supporting ability, user mobility and vertical handoffs in the integrated network. The system is modeled using multidimensional Markov chain and a numerical analysis is presented...
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.