The opportunistic cooperative platform and adaptive cooperative control scheme were proposed based on the redundancy degree and priority of cooperative data packet, as well as selective characteristics of time domain and frequency domain. First, opportunistic cooperative platform was defined according to the cooperative data stream scale, mapping algorithm, and priority and redundancy of cooper...

Tactical environments exhibit the scarcest communication resources of any military setting. However, emerging C2 systems utilize data services demanding significantly higher bandwidth and lower latency from tactical networks than ever before. The heterogeneous nature of C2 systems and data services within coalition environments raises the level of complexity even further. This paper takes a sys...

The concept of cooperative relaying promises gains in robustness and energy efficiency in wireless networks. This survey gives an introduction and overview of promising methods that can be used for cooperative relaying: relay selection protocols, cooperative channel and network coding, and physical layer aspects such as cooperative modulation. The particular methods can be seen as building bloc...

Current approaches to the development of cooperative information systems are based on services to be offered by cooperating organizations, and on the opportunity of building coordinators and brokers on top of such services. The quality of data exchanged and provided by different services hampers such approaches, as data of low quality can spread all over the cooperative system. At the same time...

The connectivity generated by the Internet is opening opportunities for services composition. As a consequence, organizations are forming online alliances in order to deliver integrated value-added services. However, due to the lack of methodologies and tools, the development of such composite services across organizations is usually ad hoc and raises a number of issues, especially in the ident...

Real-time database systems has been an active research area in recent times. In spite of this, their applicability to speci c applications has not been well studied. We attempt to rectify this shortcoming by studying two applications: 1) cooperative distributed navigation systems and 2) network services database systems. The former is a hard real-time system and the latter a soft/ rm real-time ...

National agricultural statistical information is a product of cooperative agreements and collaboration across agencies at the state and federal levels. This allows for sharing of responsibilities for data gathering, aggregating and disseminating information, and providing services. The agencies involved in cooperative arrangements to accomplish these tasks include: US Department of Agriculture ...

Scientific experiments are supported by activities that create, use, communicate and distribute information whose organizational dynamics is similar to processes performed by distributed cooperative enterprise units. On this premise, the aim of this paper is to apply existing enterprise models and processes for designing cooperative scientific experiments. The presented approach assumes the Ser...

The cyclical economic downturn in the United States has forced many Extension administrators to rethink and adjust services and programming. The Cooperative Extension System (CES), the organization primarily responsible for governmental Extension work in the United States, at Iowa State University responded to this economic downturn by restructuring its organization from county based to a regio...

Group support systems impose specific requirements on the underlying infrastructure regarding communication, configuration and data management. In this paper we concentrate on computer-supported cooperative work in the area of software development. We present the main principles of an experimental toolset for cooperative software development, outline specific demands on the underlying infrastru...