Green Terminals for Next Generation Wireless Systems



Green-T Key Data

































































































Green-T Overview








 One of the biggest impediments of future wireless communications systems is the need to limit the energy consumption of the battery-driven devices so as to prolong the operational times and to avoid active cooling. In fact, without new approaches for energy saving, there is a significant threat that the 4G mobile users will be searching for power outlets rather than network access, and becoming once again bound to a single location; some authors describe this effect as the “energy trap” of 4G system.

GREEN-T aims to overcome the energy trap of 4Gmobile systems by investigating and demonstrating energy saving technologies for multi-standard wireless mobile devices, exploiting the combination of cognitive radio and cooperative strategies while still enabling the required performance in terms of data rate and QoS to support active applications.

This notion is further extended by investigating lightweight security approaches, which is a pivotal requirements of 4G systems that will constitute a multitude of players from network operators to services provides cooperating under a converged service platform.

GREEN-T commits to the creation of tangible outputs, this includes not only implementations and showcases, but also inputs to standardisation, and where regulation is affected to regulation (via input to, for example, future editions of the ERO (European Radiocommunications Office) workshops on SDR/CR) and finally through creation of commercially exploitable intellectual property. By definition GREEN-T is a research not a development project, however having a rather large number of SMEs and industry, with a clear scope for commercial exploitation of the project outcome.

Envisaged products include:

  • LTE emulator platform; to serve as an experimental platform for operators to investigate new deployment scenarios for LTE energy saving
  • Energy-efficient demonstrators for cooperation with short-range and vertical handovers; The GREEN-T is in line with the European strategy on Green communications, and can provide the knowledge that will be the base of new products and even new industries. Particularly, the energy efficiency solutions will have a very direct impact on the network operator OPEX, and hence significantly change the operator’s competitiveness.
  • Products for public safety scenarios, specifically for the PMR devices of TETRA and TETRAPOL networks.
  • Incentives to encourage cooperation among users/handsets and develop attractive business models for the network/service providers to stimulate and motivate cooperative networking among users and between heterogeneous networks.



The Green-T project is structured into 7 Work Packages (WPs).









WP1 : Management
This work package mainly aims at the overall management of the project.


WP2:  Scenarios, Architecture Definition and Business Cases
This work package aims at identifying the technical scenarios that will serve as guidelines for research throughout the project. The work package will also define the system architecture and metrics for the evaluation of the proposed solutions.

WP3:  Green Reconfigurable Radio Transceivers
A key concept of GREEN-T relies on the ability of the transceivers to use the air interface in the transceiver’s vicinity that will have the least energy consumption footprint. WP3 Objectives are to investigate multi-standard flexible antenna solutions for transceivers (RF and baseband) considering power consumption as a key metric, to optimize RF front end / antenna matching for higher energy efficiency; and to study antenna techniques to improve energy efficiency though with limited complexity.

WP4: Exploiting short range networking for the design of energy efficient wireless networks
WP4 will develop energy efficient cooperative schemes using short-range technologies for saving energy in wireless systems. In particular, we will study discovering mechanisms of neighbouring nodes, energy efficient protocols for cooperative networks using novel PHY-layer technologies, MAC protocols to enable energy-efficient short-range cooperation between nodes and cooperative networks via end-to-end coding as well as security issues.

WP5: Green Cognitive Handovers

The scope of WP5 is to investigate, develop and demonstrate an energy-efficient handover scheme to minimize power consumption of a mobile terminal due to communication while conserving the desired communication experience and optimum quality of service (QoS). This will enable next generation networks to support energy-efficient handovers in a cognitive manner thus supporting the paradigm shift towards green cognitive networks.

WP6: Integration, Validation and Field Trials
The focus of WP6 is to prove the concepts of GREEN-T on showcases portraying short-range cooperation in homogeneous networks (scenario 1) and vertical handover for power saving (scenario 2). The showcases will be based on the scenarios defined in WP2, but with an emphasis on GREEN-T technology exposure and proof of concept. To this end, WP6 will integrate key elements of GREEN-T technology developed in other WPs in order to validate the project concepts.

WP7: Dissemination and Exploitation
The main objective of WP7 is to disseminate and promote the outcomes and technologies of GREEN-T not only via prestigious conference presentations and journal publications, but also through the participation possibility in the working standardisation consortiums. The GREEN-T solutions of which benefit commercial implementations should be supported and facilitated for the development of actual technology-embedded products by the industrial partners within the project.









Due date:
D1.1. GREEN-T Handbook
D1.2. Mid-Term Project Report
D1.3. Final Project Report
D2.1. Scenarios and System Architecture Definition – Intermediate
D2.2. Scenarios, system architecture and performance metrics
D2.3. Business Models and incentive mechanisms
D3.1. Flexible low power digital techniques – intermediate version
D3.2. RF and antenna techniques for low power flexible transceivers – intermediate version
D3.3. Flexible low power digital techniques including HW module description – final version
D3.4. RF and antenna techniques for low power flexible transceivers including HW module description – final version
D4.1. Energy efficient node discovery mechanisms
D4.2. Cooperative L1-L3  and lightweight security for power saving – intermediate version
D4.3. Implementation of cooperative short range protocols for power saving
D4.4. Cooperative L1-L3  and lightweight security for power saving – final version
D5.1. Energy efficient network discovery mechanisms
D5.2. Green vertical handover algorithms – intermediate version
D5.3. GREEN-T mobility platform for green vertical handover
D5.4. Green vertical handover algorithms – final version
D6.1. Definition of showcases and demonstrated technologies
D6.2. Test-bed architecture, implementation and test plan
D6.3. Measurements report and global view of GREEN-T proposed strategies
D7.1. GREEN-T Dissemination plan
D7.2. Standardization and dissemination report
D7.3. Report on GREEN-T Exploitation of results