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.
Exploiting multi-user diversity (MUD) means to assign the resources to the user experiencing the best channel conditions. When multicast communication is considered, MUD means that a sender can serve the intended receiver users using one or many data transmission rates. In fact, MUD-based multicast schemes aiming to maximize the multicast throughput (e.g. DOMS and MOST) or to minimize the multicast...
In the context of multi-rate communication, the throughput-based multicast routing that aims at maximizing the end-to-end throughput is very different from the commonly adopted delay-based multicast routing that aims at minimizing the end-to-end delay. Definitely, the delay-based approach is not suitable for applications that need to transfer large amounts of data (e.g. grid applications). In view...
In this paper, we introduce a new routing strategy that allows high-throughput and channel-aware multi-rate multicast in wireless networks. This new routing strategy, based on the so-called End-to-end Multicast Session Efficiency (EMSE), is founded on the multi-user diversity (MUD) and the wireless broadcast advantage (WBA) features. It aims at: i) joining users that provide the best-received multicast...
Exploiting multi-user diversity (MUD) for multicast consists in choosing the data rate(s) utilized to serve a number of users who have different channel qualities. Some of the proposed multicast schemes aim to maximize the throughput (e.g. EMTH), while others seek to reduce the transmission time (e.g. EMTT). Actually, it is well known that the process of computing the accurate MUD multicast throughput...
Multicast routing is a fundamental issue in wireless networks and related routing strategies should select the lowest number of parallel conflicting transmissions. However, current works on this problem accounts only for conflicts occurring within the transmission ranges of the nodes. Particularly, no work is interested in studying conflicting transmissions while using multi-rate concurrent multicast...
The broadcast nature of the wireless medium makes multicast communication subject to various challenges, especially the unreliability due to the interference [2] and the impact of the transmission data rate choice on the conflicts between communicating users. In fact, a fundamental trade-off exists between communication speed (transmission data rate) and communication range. Actually, the effect of...
We propose a new multicast access scheme that is founded on a metric that allows high-throughput multicast in MANETs. The new access metric, called MOST (as Maximum Opportunistic Scheduling scheme Throughput), is computed for each multicast session and utilized to find the optimal number of transmissions and the best set of transmission data rates to use in order to achieve the highest multicast session...
Multiuser diversity refers to a kind of diversity present across different users in a fading environment. This diversity can be exploited by scheduling transmissions so that users transmit when their channel conditions are favorable. Exploiting multiuser diversity access, called also opportunistic access, conducts to a system efficiency that rises with the number of users. Different opportunistic...
In a wireless network, the signals transmitted between a source station and different receiver users most often have different channel fluctuation characteristics. This diversity that exists between users is named multiuser diversity (MUD) and can be exploited to improve the capacity of wireless networks. One way of exploiting MUD is by opportunistic scheduling of users, i.e. giving priority to users...
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.