The use of Satellite Communications (SATCOM) has become essential to operations in both Afghanistan and Iraq. In particular, the Iridium satellite constellation has demonstrated its usefulness and flexibility. It has had significant impact on how operations are conducted. Iridium provides users both voice and data services. There are two approaches to sending data over the Iridium network: a ci...

The control plane has emerged as the key entity of the International Telecommunications Union (ITU-T) Automatic Switched Optical Network (ASON) architecture, enabling both soft-permanent and switched connection establishment. The fundamental control plane functional module is the Optical Connection Controller (OCC) which in turn, is divided in four sub-modules. The Link Resource Manager (LRM) i...

In this paper, we investigate the performance of a WDM MAC protocol (EM-CRMA-II) which has been designed for providing Quality of Service requested by multime-dia applications. The study addresses the blocking probability for high-speed multicasting circuit-switched traac. Our performance model has been developed as a block-new multiple interdependent Markov chains problem. We propose a general...

Ethernet is the most famous type of communication network used for office applications. Currently, networks used on field level and on office level are different due to their specific requirements. Especially for real-time systems, the deterministic behavior of the network is very important. Now Switched Ethernet seems to be applicable also on field level, because collisions can be avoided and ...

AFDX (Avionics Full Duplex Switched Ethernet) is an avionics data network based on commercial 10/100Mbit switched Ethernet. AFDX uses a special protocol to provide deterministic timing and redundancy management providing secure and reliable communications of critical and non-critical data. AFDX communication protocols have been derived from commercial standards (IEEE802.3 Ethernet MAC addressin...

A novel direction-finding method for stations of IEEE802.11 wireless local area networks is presented in this paper. The method uses a switched beam array for determining the direction of arrival of the incident electromagnetic field in a time efficient way and associates certain medium access control MAC layer functions with different radiation patterns of the switched antenna array, in order ...

Circuit-switched Banyan interconnection networks can be built from simple switching elements that do not have logical processing or buffering capabilities. This paper describes a distributed technique for dynamic control of such a network, so that circuits can be established in response to the changing needs of a parallel application. Control information is interleaved with data, thus avoiding ...

Packet switched data network like Internet, which has traditionally supported throughput sensitive applications such as email and file transfer, is increasingly supporting delay-sensitive multimedia applications such as interactive video. These delaysensitive applications would often rather sacrifice some throughput for better delay. Unfortunately, the current packet switched network does not o...

Routing as well as the management of communication networks that support hybrid types of communications requiring quality of service is a very hard problem. We present here a framework that decomposes the network into a hierarchy of abstract views of the network that summarizes the available bandwidth resources and highlights bottlenecks in the network in order to reduce the complexity of the p...