Public Safety



Public Safety

ICS telecom EV is a software suitwhich easies the planning and optimization process for public safety network operators

ICS telecom EV is the first public safety network planning solution that combines network planning and optimization features including:

  • Coverage planning

  • Interference calculations

  • Capacity planning

  • Automated handover, neighbor list planning and analysis

  • Monte Carlo simulations

  • Automatic site planning

  • Automatic site optimization

  • Automatic frequency planning

  • Traffic & mobility profile editor (end devices)

Public safety operators need a multiple technology tool compatible with TETRA, PMR and Public Safety LTE, and manage coverage, capacity, site parameters and neighbor planning and optimization.

ICS telecom EV offers all of this and features propagation models which perform coverage calculations to a high level of accuracy without the use of the automatic model tuning module.

A model which can be used at a calibration stage to improve the final AFP result when drive test measurements are available.

Case studies

Tetra Network Design with Prospective Planning


The main issue with TETRA network design is the ability to determinate the number and the location sites required to achieve the target coverage. The role of the RF planner will consist of finding the best candidates to provide service for users in a given area.


ICS telecom EV’s ‘Prospective planning’ function identifies the best locations for new sites for greenfield and densification scenarios. This function is based on coverage target assumption. After users (subscribers) have been generated, they will be used to automatically add sites and the connection to their parent Base station using different constraints. The TETRA network design is then automatically performed, taking into consideration the required criterion based on coverage threshold and traffic demand.

ATDI:Public safety made easy

Automatic frequency planning features


TETRA is based on TDMA signal with time division of channels. To provide service to many terminals at a time, each sector will need to use use several TRx. So that, in the network planning process, it is necessary to optimize the physical parameters (azimuth, tilt, frequency channel) to improve the coverage and the quality of the network.


Once the preliminary coverage of the network has been performed, an automatic station parameters optimizing process can be carried out. This feature of ICS telecom EV can optimize individually or simultaneously: Antenna patterns, antenna height, Azimuth, Tilt and Power. From the traffic demand to be offered, ICS telecom EV will assign to each station the number of TRx required for each sector. And ICS telecom EV also offers an automatic frequency planning feature. From a predefined list or band of frequencies, an optimized frequency plan will be automatically assigned to the network, minimizing or even removing interfered areas.

ATDI: Ensuring networks run at full capacity

Mission Critical Push to Talk (MCPTT) feature


LTE mobile broadband should help emergency services with live mobile video, situation aware dispatching and remote diagnostics. Mission Critical Push to Talk (MCPTT) feature provides one-to-one and one-to-many voice communication services. Each public safety device sends traffic data to a dedicated mission critical push to talk server and the server then copies the traffic to all the recipients. Although the number of public safety users is significantly lower than regular subscribers in any commercial LTE network, the number of simultaneously active public safety users can be very high, especially in a relatively small area when a major incident occurs.


The ‘Parenting LTE’ feature of ICS telecom EV is based on a population of public safety users, with specific profiles and traffic demands defined. It will solve the issue of network traffic congestion (or low traffic QoS performance) by checking performance of each site, including hot spot areas. This function takes into account DL/UL coverage criterions, traffic assumptions and schedulers.

ATDI: throughput safety

“Cluster assignment” feature


The public safety solution based on LTE technology should support direct communication between public safety users when the devices are in high density and if the network does not work or where users are located in non-covered areas. Proximity Services allows two devices to communicate directly - without data routing through the EUTRAN network. 3GPP standardizes Proximity Services (ProSe) for those purposes. The range of proximity network depends on the strength of the received signal and the radio conditions, such as interference.


“Cluster assignment” functionality of ICS telecom EV creates connections between different public safetydevices with constraints such as the distance between 2 linked devices, the maximum number of devices per station and per cluster, with a way to sort the devices. The connections between two subscribers will be made if the power received is greater than the predefined threshold. Connections between Subscribers/Clusters and eNodeBs can be performed with the help of “Cluster Parenting” function, limited to the maximum number of devices allowed. The Prospective planning feature can also automatically add new cells to ensure connectivity for all devices that cannot be directly connected to any existing eNodeB.

ATDI: Guaranteed safety for public

Maritime Communications

MF Groundwave Propagation Modeling for Maritime Networks

Introduction to modeling MF band propagation (3 kHz - 30 MHz) for Maritime Networks with HTZ
For the past seventeen years ATDI has been integrating and developing software for modeling anomalous radio wave propagation for the purposes of RF network design. This includes propagation phenomenon such as ducting, troposcatter and their applications over terrain and water.
Over the past five years, ATDI has dedicated significant resources into investigating how to model the propagation characteristics of frequencies below the VHF band. There are many applications to these frequencies including but not limited to:

  • Aeronautical Navigational Aids

  • Automatic Link Establishment for Intelligence gathering

  • Emergency communications for Maritime Networks


ATDI has developed several specific features into its product line for modeling a variety of below VHF band propagation for each of these applications, this document will be the first in a three-part series highlighting how ATDI's flagship RF network design tools model Maritime Communications.
This first document will focus on modeling MF Groundwave propagation from ship to shore along coastlines. This paper will focus on developments in the areas of cartographic map data preparation, integration of propagation standards and calibration information and custom reporting options available to users of HTZ for the purposes of modeling Maritime Networks.


Preparation of a Conductivity/Permittivity Map from the ITU IDWM database:

In the case of MF propagation, terrain obstruction information provided by the classic Digital Terrain Model used with most RF network modeling packages is of greatly diminished importance. More important, are the electromagnetic properties of the terrain in particular the Conductivity and Permittivity of the ground.
These types of maps are usually available from the local national spectrum authority. ATDI's GIS management tool, ICS map server tool can create these maps from any type of source (digitized map, vector map, etc.) in a format compatible for RF analysis with HTZ.
ATDI cartographic services can also provide this type of information for any country in the world using the ITU Digital World Map (IDWM) database as a global source of conductivity and permittivity data in all varying regions. Note, that this is the same source for the conductivity map in the FCC 47 CFR 73.190.

The map above is provided in the form of HTZ's classic clutter layer. Since the clutter layer can serve as a generic skin or blanket of morphological information layered over the terrain model, and can contain user defined propagation characteristics per clutter class/code, this layer was perfect to reuse as a conductivity map layer.
The units of each region of conductivity are in milli-Siemens/meter (mS/m) and can be configured as labels of each clutter class/code to give the map distinction in the HTZ interface.
In order to properly model the radio wave propagation of MF signals, ATDI has also integrated the latest ITU recommendations specific to MF Groundwave propagation: ITU-R P.368-9 and ITU-R M.1467-1.
calculation feature used to generate the field strength received predictions for each pixel on the map is based on the integration of ITU-R P.368-9 into HTZ's propagation engine.
The ITU-R P.368-9 model depends on the input of conductivity and permittivity data which is provided by the ITU maps described previously.
These values provide the ITU-R P.368 Groundwave model with the appropriate attenuation information to model MF propagation over land and sea allowing HTZ to generate MF Groundwave coverage plots.
In order to make sure that the receive sensitivity of each radio network element is configured appropriately, with respect to their immediate environmental conditions and time of year,
HTZ has also integrated a NOISDAT calculator derived from ITU-R M.1467-1.


The NOISEDAT Calculator takes into consideration the operating frequency, bandwidth, signal-to-noise ratio, 90% fade margin and estimated radiated power as well as specifications of the receiver environment and season to model the variability in Noise contribution to radio propagation in the MF band.
Essentially, the NOISEDAT calculator serves as a reference to model the expected Noise Rise and respective threshold degradation at a given site of interest.
ATDI has even integrated consideration for A2 sea region in order to generate an output based on ITU-R M.1467-1 NOISEDAT calculation to give the predicted receive sensitivity in dBm and dB-V/m as well as range in nautical miles and kilometers. This information is used to calibrate HTZ's propagation engine appropriately for ship to shore (reverse coverage) calculations.


Reporting options specific to modeling Maritime Networks
ATDI tools also includes reporting features specific to modeling Maritime Communications including the ability to generate nautical mile boundaries from the coastline or from the locations of the shore stations:

ATDI continues to refine its modeling processes for MF Groundwave propagation studies in response to emerging requirements from the spectrum authorities of Coast Guards and Naval agencies all over the world.
ATDI's strong association with the ITU, and expertise in integrating ITU recommendations into its product line allow ATDI to be the world leader in translating complex propagation phenomenon to simple, intuitive graphics that can be understood by the various policy makers and stake holders involved utilizing and managing a country's spectral resources.
In upcoming parts of this series on modeling Maritime Communications, we will focus on newly developed features for generating probability of coverage per season and frequency for HF Skywave propagation as well as modeling HF antennas and ultimately VHF coverage and traffic analysis for Maritime Communications.
ATDI offers services to support the spectrum management and spectrum engineeering needs of the Naval Sea Systems Command, Naval Air Systems Command, Space and Naval Warfare Systems Command, Naval Supply Systems Command, Military Sealift Command, Naval Facilities Command, Strategic Systems Programs, Office of Naval Research, and the United States Marine Corps.

We fully comply with SeaPort-e statement of work (SOW) requirements in 3 functional areas in Zone 2:

Modeling, Simulation, & Analysis Support;
Software Engineering, Development, Programming, & Network Support; and
Technical Training Support.
Our Capabilities
Spectrum modeling, simulations, and analyses

ATDI’s staff has decades of experience in spectrum modeling, simulations, and analyses to assist the Department of Navy's endeavor to ensure spectrum support for its spectrum-dependent systems and protect these systems from interference. Below are some examples of ATDI’s past efforts:

- Performing predictive modeling studies for electromagnetic, Doppler, and reflective interference from a proposed wind farm near the Naval Air Station in Fort Worth, TX (NAS Fort Worth) to tactical air navigation (TACAN) system, precision approach radar (PAR), and Digital Air Surveillance Radar (DASR);
- Performing interference evaluation and mitigation analyses between various analog radar systems as well as navigational aids for Naval Air Station-based aircraft and wind turbines deployed around the United States;
- On behalf of the Department of the Interior’s Office of the Chief Information Officer/Enterprise Infrastructure Division/National Radio and Spectrum Program Management Office (DOI), developing as software tool that models Long-Term Evolution (LTE) networks, federal earth station receiver, and fixed point-to-point microwave systems and simulates interference from LTE user equipment into federal earth station receivers and microwave receivers;
- Modeling radio frequency (RF) signal propagation over diverse terrain at terrain resolutions down to the sub-meter level using off-the-shelf terrain datasets and custom project-specific datasets;
- Performing measurements and simulations to assist with the evaluation and network planning of the US Coast Guard’s (USCG) medium frequency (MF) and high frequency (HF) Global Maritime and Distress and Safety System (GMDSS);
- Performing integration analysis for the USCG’s HF sites and the US Customs and Border Protection’s (CBP) Customs Over-The-Horizon Enforcement Network (COTHEN) and creating an optimized network topology;
- Conducting large RF coverage, interference, and optimization analyses in the MF, HF, very high frequency (VHF), ultra high frequency (UHF), and super high frequency (SHF) bands for various government and commercial clients, including USCG and DOI;
- Developing and commercializing software for the design, analysis, regulation, modeling, planning, and management of radio frequency (RF) networks operating between the frequencies of 10 kHz and 450 GHz;
- Implementing spectrum management/spectrum engineering standards, methodologies, and recommendations from the National Telecommunications and Information Administration (NTIA), Telecommunications Industry Association (TIA), Federal Communications Commission (FCC), European Telecommunications Standards Institute (ETSI), the International Telecommunication Union (ITU), and other RF standards and recommendations into commercial-off-the-shelf (COTS) software tools.
- Software engineering, development, programming, and network support - As the designers and developers of Spectrum-E and other ATDI software (e.g., HTZ Warfare and ICS telecom), our staff is well-versed in software engineering, development, coding, testing, delivering, and supporting algorithms, programs, and software (source code and executables). Spectrum-E, which was launched in May 2012, clearly demonstrates our software skills and technical expertise. By leveraging over 20 years’ worth of ATDI expertise in developing RF engineering software tools with the Association of Public Safety Communications Officials International’s (APCO) extensive knowledge in public safety spectrum management, ATDI staff developed a landmark web application for spectrum engineering that is compliant with FCC and TIA standards for electromagnetic compatibility analysis and frequency nomination for public safety services.

Technical training support

Our staff’s extensive RF backgrounds enable ATDI to provide both general and specialized training on spectrum-dependent concepts and technologies to telecommunications and spectrum management organizations around the world. ATDI’s general training courses are focused on RF fundamentals, which include radio wave propagation through free space, diffraction, absorption, multipath, sub-path attenuation, and terrain effects. Advanced courses are tailored to a customer’s specific needs and vary based on the projects that customers are working on.
Examples of past customer-defined topics include:

- Radar principles, e.g., radar signal, illumination, reflection, range of detection, false target, Doppler effect, interference, jamming, etc.,
- Electromagnetic compatibility assessment;
- Land mobile radio considerations, e.g., simulcast delay spread, inter-symbol interference, etc.;
- HF skywave analysis;
- Military jamming analysis;
- Network interference considerations;
- EMI scenarios;
- Microwave link budget design, backhaul design, interference calculations, antenna discrimination, interference objectives, etc.;
- VHF/UHF spectrum management; and so forth.
- We provide training (face-to-face or using GoToMeeting™ technology), dedicated support (via phone, email, GoToMeeting™, or site visits either at ATDI’s office or the customer’s office), and maintenance (i.e., bug fixing, software upgrades, and manual updates) for all ATDI commercial off-the-shelf (COTS) software. Our support staff has exhaustive knowledge of our COTS software since they use the software themselves to perform a wide range of RF analyses. Since our support staff are expert users of the software, they can usually provide answers on the spot. Moreover, our staff has accrued extensive experience in installing our COTS software in a broad range of information technology (IT) environments since the IT environment for each of our federal customers tends to be unique. As a consequence, our staff is adept at assisting our customers with installations when our customers opt to undertake the task themselves.

Our Quality Assurance Program

ATDI’s management approach toward the delivery of software simulation, software engineering, and training services is comprised of the attributes necessary to address all potential contractual and technical delivery requirements.
These attributes include:

- Contract level program management and technical oversight;
- Management processes and controls tailored to the complexity of each customer requirement; and
- Functional support services to support the program team in meeting all administrative and financial requirements.

ATDI’s management approach has been developed over the delivery of various contracts for the provision of software simulation analysis services, software training services, and software development services over the past 26 years. This management approach has served ATDI and its customers in the federal government sector with on-time and on-budget delivery of quality services.

PPDR (LTE advanced) - TETRA - DMR - HF/MF - VHF - UHF - Maritime