Public Safety

ICS telecom EV planning and optimization for public safety network operators

ICS telecom EV is a 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 with the ability to manage coverage, capacity, site parameters and neighbor planning and optimization.

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

The automatic model tuning module, which can be used at the calibration stage to improve the final AFP result, can be used when drive test measurements are available.

TETRA Network Design with Prospective Planning

Challenge

One issue with TETRA network design the requirement to determine the number and the location sites required to achieve the target coverage. The RF planner needs to identify the best candidates to provide service for users in a given area.

Solution

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 assumptions. After 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 communications made easy

Automatic frequency planning feature

Challenge

TETRA is based on TDMA signals with time division of channels. To provide service to multiple terminals at a time, each sector will need to use use several TRx. During 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.

Solution

Once the preliminary coverage of the network has been performed, an automatic station parameter optimizing process can be carried out. ICS telecom EV can optimize individually or simultaneously:

Antenna patterns
Antenna height
Azimuth
Tilt and Power.

To enable traffic demand, ICS telecom EV assigns each station the number of TRx required for each sector. ICS telecom EV also features an automatic frequency planning; 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

Challenge

LTE mobile broadband supports 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.

Solution

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  solves the issue of network traffic congestion (or low traffic QoS performance) by checking the 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

Challenge

A public safety solution based on LTE technology should support direct communications between public safety users for devices in high density areas, 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 this purpose. The range of proximity network depends on the strength of the received signal and the radio conditions, such as interference.

Solution

“Cluster assignment” function in ICS telecom EV creates connections between different public safety devices with constraints such as the distance between two 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