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DENISE

DENISE

The main objectives of the DENISE Project are:

• To define a suitable system architecture enabling efficient resource usage and support of different categories of services such interactive broadcast, mobile messaging, and bi-directional real-time communications for management of emergency situation,
• To perform a detailed design of suitable RTN link access technologies,
• To adapt DVB-SH technologiy in order to also support realtime services in the FWD link,
• To design suitable radio resource management strategies, network protocols and related signalling,
• To implement an end-to-end demonstrator,
• To validate and assess the performance of all main system functionalities in the lab,
• To demonstrate the end-to-end system capabilities through field trials with W2A satellite,
• To consolidate the system specifications based on the outcomes of field trials and lab tests.

The high level system architecture of the DENISE system is shown in the figure below. It includes all elements that will be found in the targeted system, as well as the interfaces among them, including the interfaces to existing 2G/3G and IP terrestrial networks.It is also indicated that all elements except the NCC can appear several times in the system.
The different terminals are shown as part of the user segment; the forward and return Complementary Ground Components (also referred to as repeaters and collectors) are grouped under the complementary ground segment, which also includes the so called gap fillers (GF), which are ground elements that interact with the terminal but are not managed by the service operator.
Even if the baseline design will be done considering the features of the W2A satellite, the system shall be envisaged so as to be also compliant with potential future satellites. The ground segment is composed by the hub (or hubs) together with the NCC, both interfacing the service centres. In the targeted system, all network elements (except the satellite) can have direct interfaces to 2G/3G or IP terrestrial networks.

The DENISE Project is organised in two phases:

1. Phase 1 will address the system design and specification as well as a preliminary performance assessment by means of software simulations.
2. Phase 2 will address the implementation of an end-to-end demonstrator, the design of all related algorithms, the execution of lab tests and field trials and the consolidation of the system specifications.

Partners:

Fraunhofer IIS, Germany
Indra Espacio, Spain
MBI group, Italy
Space Engineering, Italy