Mobile connections are the bedrock of society in developed nations
Network operators have billions invested in effective systems
Companies, emergency services and a huge majority of the public rely on mobile
Making mobile work is at the core of ATDI’s business, and has been for three decades. Network operators of all sizes and in all environments, have relied on ATDI for the software and expertise to meet customer demand. Whether mobile users are on a train, a bus or a mountain top, they demand service. ATDI’s planning, modelling and consultancy has helped make that happen across the world.
ICS telecom EV streamlines the planning and optimisation process for mobile network operators. It combines mobile network planning and optimisation functions and features advanced functions, such as:
ICS telecom EV is a multi-technology tool encompassing GSM, UMTS, LTE, Wi-Fi for coverage, capacity, site parameters and neighbor relations planning and optimization.
ICS telecom EV is applicable across all technologies as its main functions are universal. The propagation models utilized in ICS telecom facilitate coverage with a high degree of accuracy with or without the automatic digital map tuning module.
At the calibration stage, this can be tune to improve the final AFP result when drive test measurement files are available.
The main issue with mobile network design is the ability to determine the number of sites and site locations required to achieve the target coverage and throughput. In practice, during an LTE deployment, most of the site candidates are selected from a list of available sites (2G or 3G existing sites). The role of the RF planner is to find the best candidates and optimise the network while adding new macro or micro/indoor sites.
ICS telecom’s prospective planning function identifies the best locations for new sites for greenﬁeld scenarios. This function is based on coverage target assumptions. The parenting LTE function is based on a population of LTE users with profiles and defined traffic demands. This resolves the issue of traffic network congestion (or low traffic QoS performance), by adding new sites in the not-spot areas. This function takes into account DL/UL coverage criteria and traffic assumptions.
The automatic search site function generates the LTE network design taking into consideration the required RSRP threshold.
During network planning it is necessary to optimise the physical (e.g. antenna tilts and azimuths) and logical parameters (e.g. Tx power) to improve the coverage and the quality of the network. After the launch, networks constantly change due to fluctuating traffic conditions and the addition of new sites, meaning optimisation is still required to retain the high levels of performance defined by KPIs.
ICS telecom EV offers several automatic optimisation features for network parameters to increase coverage and capacity. The station function allows the user to select the sites required to achieve the coverage target by clutter types. This reduces the number of sites required. The function ‘select station according to surface covered by station’ allows the user to select the sites for a given coverage target (surface per km²) required by station. Similarly, the ‘route planning’ function is dedicated to roads, highway, railway environments and is used to automatically determine the best sites and configuration to optimise the clutter defined as a ‘vector’. Lastly, the ‘station optimisation’ function allows the user to pre-define a set of parameters (tilt°, Antenna height, azimuth…) to improve the station coverage.
The isolation between cells which are assigned the same physical layer cell ID should be sufficient to ensure that UE never simultaneously receives the same identity from more than one single cell. PCI collision could potentially lead to handover failures and dropped calls. Neighbour cells with the same root sequences could interfere with each other and cause unnecessary PDCCH and PUSCH resource reservation. To minimise intra-cell interference in terms of cell range, the planner should apply this method: the smaller the cell size, the larger the number of orthogonal signatures and improved detection performance.
The advanced ‘neighbour calculation’ function allows the user to perform the intra- and inter-frequency neighbour lists based on the coverage predictions of each cell. This is required to plan the PCI/RSI allocations. ICS telecom EV features ‘RSI Root Sequence Index allocation’ which retains the actual cell size thereby avoiding the risk of collisions between the neighbour cells.
When planning small cells, consideration should be given to the choice of locations for sites with maximum demand and traffic, which in turn will provide the best return on investment. The majority of site candidates are selected from a list of known sites such as bus stops, lamp posts, etc. Similarly, appropriate back haul links for each site should be created in this manner.
The ‘parenting LTE’ function is based on a population of LTE users with profiles and defined traffic demands. This function resolves the issue of network traffic congestion (or low traffic QoS performance) by adding new sites in the not-spot area. This function takes into account DL/UL coverage criteria and traffic assumptions.