ATDI complements this with a comprehensive consulting service. Its engineers have written user requirement definitions for battlespace and civil spectrum management systems; and they have implemented these systems across regulators, deploying and integrating software into existing systems for billing, contact management and accounts.
ATDI staff have implemented FAT (frequency allocation table), EFIS (European frequency information system) and other portals to facilitate service access from regulators’ web sites; and ATDI engineers have trained regulators’ staff in spectrum management business processes and the engineering aspects of the work.
ATDI’s spectrum management tool consists of four main products:
A European regulator needed to know the location, purpose and power of each base station in its country. In addition, because of the nation’s strong tradition of open government, it was important for the regulator to be able to publish this information for public scrutiny and comment. ATDI’s task was to find a way of collating data from the competing companies using the spectrum, then to establish how to integrate that information into the regulator’s existing systems and, finally, to present the figures as a workable database which could be accessed, searched and updated via the current spectrum management system.
ATDI engineers analyzed the process of importing external operator data into the database management system of ATDI’s ICS manager software tool. The procedures created utilized the new Harmonized Computer Method (HCM) functionality component within ICS manager. Thus, on receipt of information about the base stations from operators, the regulator was able to import, access and amend data as required. The end result was a database incorporating every tower and its function across the country. This enabled the regulator to ensure appropriate provision of radio communications services across the nation while assuring the Green lobby that power was not being wasted nor were the population being subjected to unnecessarily emissions.
ATDI: Controlling data and putting it to work
Limited information may cause citizens to worry and complain.Authorities are facing a dilemma: digital growth vs. citizen protection. Although local councils have limited legal rights to prevent the rollout of base stations, politicians continue to haveinfluence which means concerns about human exposure may hamper the development of broadband communications. Regulators can play the key role of trusted party: they can gather technical information from operators, disclose information publicly, perform simulation and check for any potential issues with measurements, propose mitigation tactics and discuss implementation with operators while making, results publicly available, organize national discussions and issue guidelines.
HTZ can provide field strength exposure based on a high-resolution cartographic dataset including:Digital Terrain Model (DTM) describing the ground altitude of each point, building layer describing the contour and the height of each building, in raster format -if possible in vector format - image form WMS servers (Bing, Google, …), and an address database coming from Bing servers. 3D coverage calculations, which include the power sum of all signals received based on ECC 1999 method for building facades and/or outdoor/indoor in LOS/NLOS mode from street to building rooftop. Graphical analysis of Hot points on a given point (address) can provide information about received signals and the level at which each signal is received. Hot points can be located on the 2D view as well and street view images around a given hot point can be displayed - hot points are automatically reported. ATDI’s solution can provide public access to the information. Locations with field strength greater than a given value can be published online. Transmitting sites can be located on the map including field strength on buildings. Thanks to a geo-reverse location engine, people can get information about exposure level. Protected sites can be located on the map (schools, hospitals…). The web portal can be fully customized on demand.
ATDI: The answer to interference
A European regulator was preparing for an auction of spectrum to operators of Long Term Evolution (LTE) mobile networks and asked ATDI to provide the planning and modelling that would identify potential of the frequencies, areas where there might be issues and what strategies and tactics were available to reduce or remove those issues. All parties were acutely conscious that in this mountainous country, the population was concentrated in a few cities and that the frequencies for sale were close to those used by television broadcasters; significant interference to either the television or LTE signals would not be acceptable, nor would wholesale exclusion of the rural population from services.
To reduce the interference between television and LTE networks, several mitigation techniques were investigated in a sample area around the capital city. One of the most efficient mitigation techniques was found to be to limit the interfering LTE base stations to only vertical polarization; this is based on the fact that, with a few minor exceptions, the country’s digital television network is horizontally polarized. ATDI also proposed that while network designs were being completed, LTE operators should consider the interference potential to the television networks and suggest mitigation techniques they could deploy to overcome the effects, including filtering. In addition, the company advocated a feasibility study to assess the re-assignment of spectrum of affected areas away from channels 58 to 60; the study would also look at the effect of not using these channels in highly populated areas.
ATDI: Smoothing the path of radio auction
Spectrum management - Spectrum monitoring - Human Hazard - e-Licensing