ELEDIA@AUTH has joined the ELEDIA Research Center Network
The ELEDIA Research Center is very pleased to welcome the ELEDIA@AUTH as part of the ELEDIA Network Labs. ELEDIA@AUTH research…
Prof. Oliveri named Associate Editor of IEEE JMMCT
The ELEDIA Research Center is pleased to announce that Prof. Giacomo Oliveri has been named Associate Editor of the IEEE Journal…
R. J. Mailloux has joined ELEDIA
The ELEDIA Research Center is pleased to announce that Dr. R. J. Mailloux is member of the ELEDIA Teaching Staff.…

VELA (Vodafone Eledia pLAnning tool) is an optimization tool designed to work with the leading radio planning Forsk Atoll. In particular, VELA evaluates the UMTS signals coverage model.

The goal of cellular network planning and optimization is to obtain sufficient coverage over the entire service area to ensure that high quality voice services and data services with low error rates can be offered to the subscribers. Hopefully minimizing the consumed power and co-channel interference which limits the spatial reuse of the resources.

Forsk Atoll is the leading radio planning tool, but it doesn’t cover all aspects of optimization: here comes VELA.

VELA is a kind of Atoll’s plugin designed to tune cells’ configuration (e.g. TxPower) in order to achieve a performance gain with respect to some targets (e.g. Radio Coverage). The system is based on a complex Coverage Model engine (VECoM - Vodafone-Eledia COverage Model) and an optimizer based on evolutionary algorithms with guarantees solution convergence.

VELA software is highly customizable and has many advanced features. In order to simplify users’ experience, VELA comes with built-in project management and configuration templates support.

Main configuration groups are:
  1. Constraints applied to transmitters. A fixed value or a valid range can be set for each cell’s property, moreover each field support a custom quantization;
  2. Optimization Targets are used by the optimizer to evaluate fitness of each configuration, for example it can force a certain coverage level;
  3. Optimizer: the problem is solved through evolutionary optimization. VELA supports two different optimizers: PSO (Particle Swarm Optimizer) and VGA (Vela Genetic Algorithm);
  4. Coverage Model: VECoM computes the coverage-probability of a zone, given the transmitted and received UMTS signals;
  5. Zones. Map zones are automatically loaded from Atoll workspace. VELA supports complex polygons, even with holes;

Once VELA project is properly configured with respect to current objectives (e.g. optimize the coverage of an area by tuning cell’s configuration), the processing phase might start.
During this phase, the fitness (performance gain) is constantly monitored and progressive results (new network configuration) is updated into Atoll accordingly.

VELA fully interacts with Forsk Atoll software, thus results are automatically updated to current workspace, but in order to trace the performance gain and to help network operators, VELA generates a complete report about the optimization process, highlighting differences with initial setup and forecasting the updated coverage model.

Actually, VELA is released as stable and used by the network-management department of Vodafone Omnitel N.V.