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Periodic Report Summary 1 - CAREER LTE (Capacity and Energy Efficiency Limits of Wireless Communications for Heterogeneous Long Term Evolution Advanced (LTE-A) Deployment)

European FP7 Marie Curie IOF project Career LTE (project number: 329313) has the research objective of approaching new horizons of capacity and energy efficiency for next-generation broadband wireless networking. The project also pursues the integration of research outcome with engineering practice to go beyond the state-of-the-art of performance and energy opti-mization for heterogeneous Long Term Evolution Advanced (LTE-A) deployment. In addition, by the nature of Marie Curie individual fellowship, via training, knowledge development and integration, the project aims at fostering human capital and stimulating career development.

By the work plan, project Career LTE has the following overall research objectives in the do-main of wireless communications systems:

1) extending fundamental performance limits and analyzing capacity-energy trade-offs in wireless communications, and
2) applying the theoretical results in planning, optimization, and resource management for energy-efficient LTE-A HetNet deployment.

The first objective steers the research efforts in the outgoing phase, during which the researcher has been hosted by the Institute for Systems Research (ISR) of the University of Maryland (UMD) in the US. During the re-integration phase, the research targets the second objective above at the Department of Science Technology, Linköping University in Sweden.

In addition to scientific contributions, the Career LTE project implements training and knowledge renewal, and knowledge integration, along with result dissemination and outreach activities, to generate impacts on career development and increasing the awareness of the benefits of research as well as the funding scheme.

The project has three work packages (WPs). The first two WPs constitute the outgoing phase, and the last WP is to be accomplished in the re-integration phase.

WP 1. New concepts for analyzing capacity limits of wireless communications;
WP 2. Fundamental performance and energy trade-off in wireless networks;
WP 3. Deployment and management of green heterogeneous LTE-A.

Since the beginning of the project, the work performed within WP1 and WP2 are:

- Within WP1, an investigation and analysis of notions of performance limits from an infor-mation-theoretical perspective have been performed. Specific topics include the relationship and difference between various rate metrics such as the saturated and non-saturated throughput regions. A novel coding approach for random multiple access has been analyzed. Then, the research has derived models, complexity analysis, mathematical formulations, as well as optimization algorithms for the fundamental capacity aspect of link activation with cooperative transmission and interference cancellation in wireless networks.

- Within WP2, the work has focused on the trade-off between energy efficiency and other per-formance metrics. First, a multi-objective optimization framework has been used as a starting point to address energy and delay in optimal scheduling of transmissions in wireless net-works. Two types of scenarios are of interest: generic, point-to-point wireless links, and cellular networks where each base station has multiple users to serve. To achieve the scientific objectives, the research has applied parameterizing to facilitate the characterization of the Pa-reto-optimal frontier. Then, the focus has been on developing scalable optimization methods in order to solve the resulting mathematical formulations.

The mains results of the work are composed by the following outcome:

- The work in WP1 has led to analytical models and characterizations. These mathematical derivations form an instrument to understand the performance limits and properties in wire-less networks with random access and bursty arrival. For link activation with cooperative transmission and interference cancellation, the results include optimization algorithms that allow for characterizing the achievable performance gain of cooperative transmission and in-terference cancellation for arbitrary network topology. Simulation results have been obtained to verify the performance gain. Thus, the main results of WP1 consist in powerful analytical and computational tools that go beyond the state-of-the-art for understanding fundamental capacity aspects of wireless networking.

- The work within WP2 has resulted in new optimization concepts and computational meth-ods that effectively deal with the energy-performance trade-off. Among them, a key result is the novel notion of localized interference enumeration, which is applicable to managing the computational complexity for optimal transmission scheduling. From a methodology stand-point, a main result is the optimization algorithm with column generation that enables to ac-curately quantify the relation between optimal energy and delay. Extensive numerical results have been made available as well, to study the trade-off of the two metrics.

The research work and its outcomes are reported in four technical deliverables. All milestones of the two WPs have been accomplished.

The expected final results consist in the advancement in the state-of-the-art of how future wireless networks will be designed and managed. The project delivers analytical and math-ematical concepts that contribute to the theoretical foundation of the information and com-munications technology (ICT). The project also provides practical schemes for resource allo-cation and optimization for LTE-A in the evolution of mobile networks towards 5G. This has social impacts, because virtually all business and public sectors of the the world are dependent on connectivity and service powered by wireless communications technologies. The long-term benefits for various stakeholders consist in 1) providing the research and engineering community with the theoretical basis for inventing new technological solutions; 2) influencing the standardization efforts for next-generation networks; and 3) providing the network operators with concepts for improving resource efficiency and sustainability of the digital in-frastructure of a knowledge-intensive society.

Along the dimension of career development, a major result of the reporting period is the suc-cessful application of the IOF researcher for the grade of Senior Member of the Institute of Electrical and Electronics Engineers (IEEE). The IOF outgoing supervisor is one of the three references supporting the application.

The elevation to Senior Member is a very important milestone for the professionals in the ICT area. Senior member is the highest grade for which IEEE members can apply. This elevation requires the demonstration of “experience reflecting professional maturity” and “significant performance”. At present, only 11% of the IEEE members hold the grade of Senior Member. The importance and benefit of the Marie Curie IOF project towards fostering professional maturity is clearly demonstrated by the Senior Member grade rewarded to the IOF researcher.


Viveka Nilson, (Research Administrator)
Tel.: +46 11 363474


Life Sciences
Numero di registrazione: 182423 / Ultimo aggiornamento: 2016-05-20
Fonte d'informazione: SESAM