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.
In emergency and crisis operations, group communication is essential to coordinate rescue efforts. Mobile Ad Hoc Networks (MANETs) can provide dynamic and resilient communication services in areas without a working communication infrastructure. The connectivity of MANETs can be improved using an elevated network node due to larger ground coverage, thus improving node reachability. Simplified Multicast...
The performance of ad hoc networks depends greatly on the network topology. Thus, deploying relays or controlling the position of network nodes may impact the performance. Unmanned Aerial Vehicles (UAVs) and other elevated platforms may improve the ground network performance when used as network relays, due to better Line-of-Sight (LoS) conditions. In addition, UAVs can easily move to better locations...
Mobile networks in the military tactical domain, include a range of radio networks with very diverse characteristics and which may be employed differently from operation to operation. When interconnecting networks with dissimilar characteristics (e.g. capacity, range, mobility) a difficult trade-off is to fully utilize the diverse network characteristics while minimizing the cost. To support the ever...
In this article, we examine some major challenges to be solved in order to provide efficient end-to-end connectivity, resource management and QoS in a tactical military heterogeneous network (including the mobile edge). We briefly describe a selected set of possible solutions and mechanisms to improve inter-domain and intra-domain networking for the tactical heterogeneous network that will be further...
Path capacity estimation is used for e.g admission control decisions and rate adaptation. This has resulted in a variety of proposed techniques, mostly for the wired domain. In this paper, we evaluate the accuracy of one packet-pair estimator in a wireless test-bed. We study the performance of the estimator when it is configured to be low-intrusive and also gain experience with its use on different...
Connectionless multicast protocols are well suited for networks with a large number of small multicast groups. These protocols however do not scale with large groups, and are not robust for high mobility. We proposed a connectionless multicast protocol named MCOM that addresses the issues of mobility, scalability, and robustness. The MCOM protocol design allows for better scalability by group size...
Routing loops accounts for a fair share of packet loss in mobile networks, particularly so for heterogeneous mobile networks. Loops occur when nodes build routes based on inconsistent topology databases. The inconsistency is caused by, but not limited to, dissimilar transmission delay, lost signaling messages, mobility, traffic load, and dissimilar frequency for route update messages. The latter cause...
MANETs (mobile ad-hoc networks) are already starting to get deployed in tactical settings. In such networks, where capacity is limited compared to wired networks, QoS mechanisms are needed in order to serve high priority traffic with acceptable quality under both light and heavy load conditions. A crucial part of a QoS architecture is the admission control mechanism, making decisions on whether new...
In this paper, the connectionless multicast routing MCOM (Multipoint relay Connectionless Multicast) is introduced for mobile Ad hoc networks. MCOM adapts over a wide ranges of density of group members. It appears as unicast with few receivers and as flooding protocol, similar to Simplified Multicast Forwarding (SMF), with many receivers. MCOM utilizes the forwarding structure Multipoint relay (MPR)...
Simplified Multicast Forwarding (SMF) [3] provides an optimized flooding mechanism in MANET environments to efficiently propagate multicast packets. In order to be more useful in a broader range of scenarios, we need to be able to get multicast packets to and from fixed infrastructures. Gateways in MANETs are more complex than regular MANET nodes as they require both to join multicast groups on behalf...
Ad hoc networks have attracted much attention due to their decentralized architecture and potential mobility. The latter promise has sparked research aimed towards routing and quality of service (QoS) admission schemes. The volatile links that are inherent to these networks have however spawned a need for a cross-layering service below IP for local route and QoS decision making, or information dissemination...
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.