Top projects

COMBO. Convergence of Fixed and Mobile Broadband Access/Aggregation Networks (ICT-FP7-317762)


COMBO aims to address the convergence of fixed and mobile networks combining: 1) optimal and seamless QoE for the end-user and 2) optimized network infrastructure in terms of increased performance, reduced cost and energy consumption.

The work of the COMNET Division in COMBO focuses on:

  • WP2 Framework definition, architecture and evolution. Scenario definition, Key Performance Indicators, Use cases identification, Traffic Modeling.
  • WP4 Traffic and performance management. Energy-aware Radio Resource Management, Traffic Offloading techniques.
  • WP5 Techno-economic assessment. Assessment of the network energy consumption and costs
  • WP6 Functional development & experimental research activities. Design and development of a testbed with emulated LTE access, GMPLS aggregation and “light” EPC core network.

For more information on the project, please visit COMBO official webpage.

LENA. LTE-EPC Network Simulator


Ubiquisys, the developer of intelligent cells, and the COMNET Division of CTTC are working together to develop the world’s first open source product-oriented LTE network simulator.

The simulator will provide a common platform for LTE femto vendors and LTE macro vendors to evaluate their different solutions. The advantage for operators is that they can be sure that large and small cells from different vendors will work harmoniously before they are deployed.

In WCDMA networks, femtocells and macro cells work independently, but in LTE all cells work together as a single SON. This means that the adaptive behaviour of femtocells and macro cells is interdependent.

Simulators are important because they can evaluate product behaviour in a mature, densely deployed and heavily used network, at a time when real deployments are in their infancy. Ubiquisys made extensive use of a WCDMA network simulator during the development of its first generation of intelligent femtocells.

The open source LTE simulator is based on the popular ns-3 network simulator for internet systems. The development of the LTE simulator is open to the community in order to foster early adoption and contributions by industrial and academic partners.

For more information about Ubiquisys, please visit For technical information about the simulator, see the LTE-EPC Network Simulator (LENA) page.

SCALE. Small Cell bAckhauL with backpressurE


The COMNET Division of the Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) and AVIAT Networks have signed an agreement aiming at providing optimal networking solutions for the mobile wireless backhaul. AVIAT Networks is a leader in wireless transmission systems, applying innovation and IP expertise to build the future mobile broadband networks. The COMNET Division of CTTC combines its expertise on both the data networking and cellular worlds to optimize the next generation mobile broadband networks.

The overall goal of the agreement is to study and define a set of network-level intelligent functions for 3G, 4G, and beyond 4G network deployments. Research activities involve the study of SON capabilities: a combination of self-configuration, self-healing and self-optimization functions in nodes at the network level. This automation of processes at the network level leads to rapid deployments as well as a decrease of manual errors, and operating costs.

In this context, the SON functions studied in this agreement aim at supporting network complexity, such as resource management, in an intelligent way. The challenge is to maintain excellent user experience, while reducing the CAPEX/OPEX cost requirements. To do this, the SON capabilities must be distributed, scalable, and agnostic to the wireless technology underneath.

SIUSAS – Sistema Inalambrico Ubicuo de Servicios de Acceso y Sensorizacion (Ubiquitous Wireless System for Access and Sensors Services)


The general objective of SIUSAS project is to research on the technologies enabling Smart Cities. In particular, the work is focused on the design and the implementation of a device in charge of transmitting information coming from the environment where it is installed (public transport systems, smart grids, environment protection and monitoring systems, security systems) using wireless networks in its surroundings (e.g., WiFi, WiMAX, 3G, LTE). The device will communicate independetly from the operator of the access networks and will perform transparent handovers among the different access technologies thanks to an integrated roaming-handover module.

The project is funded by CDTI (Centro para el Desarrollo Tecnico Industrial – Spanish Ministry of Economics and Competitiveness)

SYMBIOSIS – System-level studY for coping with MoBIle data grOwth in evolved cellular networkS and future Internet environmentS (TEC2011-29700-C02-01)

SYMBIOSIS mainly focuses on studying, conceiving, and evaluating network-level services (e.g., routing, mobility, global resource management) towards a more efficient operation of mobile broadband networks at a global scale. In particular, SYMBIOSIS aims:
  • To improve cellular network performance by having in mind the requirements posed by mobile data and how the mechanisms under study by the data networking community can help (e.g., overlay network service provisioning, distributed location management, self-organized interference management in dense uncontrolled deployments).
  • To put cellular networks into a global context and to study network schemes enabling their integration with other networks (using the same or different technologies). In this direction, we will explore schemes defined to solve critical Internet problems, such as routing scalability (e.g., LISP). This also includes ways of providing critical network-level services at a global scale (e.g., routing, mobility). Scenarios representing various degrees of integration will be evaluated.

This project is in collaboration with the CCABA group of Universitat Politècnica de Catalunya (UPC)