research and innovation on mobile infocommunications at bme prof. dr. lászló pap department of...

Research and inResearch and innnovation on ovation on mobile infocommunications mobile infocommunications

at BMEat BME

Prof. Dr. László PapDepartment of

Telecommunications, Faculty of Electrical Engineering and

Informatics, BMEBudapest

June 29-30, 2009

June 29-30 2009. Hungarian-Japanese Conference 2

Content of the presentationContent of the presentation Introduction Methods of research organization The role of the staff members and the

students Research areas in mobile

infocommunication systems Research areas of the Mobile

Communication and Computing Laboratory

Some results (examples) Multi-user detection Interference analysis in FH channels Interference analysis in multi-user

channels Call admission control

Local partners, international relations Mobile Communication Research &

Development Centre and Innovation Centrum


IntroductionIntroductionTraditional mission of a Traditional mission of a

universityuniversity• Based on strong primary training

High quality education on wide-base professional areas

High level research and developmentElite-trainingFlexible curricula based on the demand

of the industry and the society• Harmony between the theory and

practicePractical education based on high level

theoretical background and industrial relationships


IntroductionIntroduction Global change of the role of Global change of the role of the traditional universitiesthe traditional universities

New effects in the development of the traditional universities Increasing number of studentsDiversification of the content of the curricula Life-long educationCompetition of the universitiesNew information technologiesNew quality measuresNew cooperation methods with the industryFast changes in the content of the curricula


IntroductionIntroduction New directions in the New directions in the development of the development of the

universitiesuniversities New directionsProfessional managementNew financing strategiesThe diversification of the financing

resourcesGeneral change of the evaluation systemNew measures of the qualityNew role of the public strategy of the

universitiesNew structure of the industrial

cooperationProfessional business plans of the

universities


IntroductionIntroduction Recommendation of the OECDRecommendation of the OECD

The new strategy must cover the following items: Regional development of the industry Cooperation strategy with the local industry Incubation program Fund raising program Participation in local and national economical

development Innovation strategy

The OECD recommends to increase the role of the high education in the regional development


Introduction Introduction The importance of utilization The importance of utilization

of the R&D resultsof the R&D results• Obtaining new financial resources

by using the intellectual products, raising the prestige of the University

• Large value added content of the products: increasing the competitiveness of the economy

• Developing qualified new jobs at the industry


Introduction our Introduction our research research groupgroup

Mobile Communication and Computing Laboratory Research and teaching of mobile

communication technologies 2 professors, 1 associate professors, 3

assistant professor, 5 post doctors 25 PhD students, cc. 100 undergraduate

students 12 research areas General research topics: digital signal

processing, mobile communication, mobile computing, mobile IP, network simulation, neural networks, professional mobile radio systems, software radio, wireless LAN, 3G mobile systems, B3G mobile systems (LTE), near field technologies


The role of the staff members The role of the staff members and the studentsand the students

Staff members Realization of the projects Consultation of the undergraduate and

PhD students Common publications with the students Organisation of the projects and the

activity PhD and undergraduate students

Active participation in the research projects

Participation in the Students' Scholarly Circles

Special tasks of the PhD students (research, publication, consulting the undergraduate students, participation in projects, etc.)

Practice in the industrial companies


Financing of the researchFinancing of the research

Financial resources Internal resources of the University National research funds National industrial support National industrial projects Support of the Hungarian Academy of Sciences for basic research

EU research programs Projects supported by the inter- and multinational industrial partners

Resources of bilateral co-operations Other national and local resources


Multi-user detection (G. Jeney, SV: L. Pap)– Stochastic recurrent neural networks for quadratic

optimisation– Results:

• A multi-stage non-linear detector for multi-user communication system described by

where R is the discrete-time channel matrix, y is the received signal and n is the coloured noise vector, and where C is the covariance matrix of the noise

Some results (example Some results (example 1.1.))


Multi-user detection(G. Jeney, SV: L. Pap)(cont.)

It is equivalent to a stochastic recurrent neural network

where is a stochastic signal vector



Multi-user detection(G. Jeney, L. Pap)(cont.) if

• If the distribution of the stochastic signal in the stochastic neural network has a logistic distribution

or complex logistic distribution, the global optimum state will have the greatest probability (in BPSK and QPSK systems)

• If the parameter of the logistic distribution goes to infinity (annealing) the global optimum will have 1 probability

• Other solutions (simplification of the neural network, using neurones with hysteresis, blind learning algorithms, soft decision function, soft feedback)



Multi-user detection (G. Jeney, SV:L. Pap)(cont.)

• Simulation results

Binary DS-CDMA systems with random code words of

length 100 serving 100 users



Multi-user detection (G. Jeney, SV:L. Pap)(cont.)

• Simulation results

QPSK DS-CDMA systems with random code words of

length 100 serving 100 users



Some results (exampleSome results (example 2. 2.))

Interference analysis in FH channels (K. Hamdi - L. Pap)

– New analytical performance analysis of slow frequency hopped spread spectrum multiple access (FHSS-MA) networks with non-orthogonal binary frequency shift keying (BFSK) and having arbitrary spacing between the hopping carriers

– Results: • A multiple access FH communication system with

signalling and correlation factor

where f is the BFSK modulation frequency


Some results (exampleSome results (example 2. 2.)) Interference analysis in FH channels (K. Hamdi - L. Pap)(cont.)

• Non-coherent receiver with decision parameters

and the binary decision is made by deciding which of |R0| and |R1| is larger

• In the case of orthogonal |R0| and |R1| the classical method can be used as

where x(.) is the characteristic functions of |R0| and |R1|


Some results (exampleSome results (example 2. 2.)) Interference analysis in FH

channels (K. Hamdi - L. Pap)(cont.)

• New analysis method with transformation

and the binary decision is made by

where is the angle between r1 and r2

• The calculation of the bit error probability is based on Pawula’s method as


Some results (exampleSome results (example 2. 2.)) Interference analysis in FH channels (K. Hamdi - L. Pap)(cont.)

where

• Interference analysis, in fading channels (Rayleigh, Rice,Nakagami), where K interfering users exist with different modulation techniques, k frequency offset and different faded channels, closed formula for average error probability, calculation of the spectral efficiency, numerical results


Some results (exampleSome results (example 2. 2.))Interference analysis in FH channels (K. Hamdi - L. Pap)(cont.)

Average SER against the frequency offset fk - f0 for orthogonal BFSK and 4FSK ( = 1) in the presence of a single Rayleigh faded CW interferers having R(τ) = 1, Eb/N0= 10 dB, SIR = 3 dB.



The case of CW interferers having exponential, triangular, and Bessel autocorrelation functions. Average BER against the frequency offset fk - f0 for non-orthogonal BFSK. Eb/N0= 13 dB, and SIR = 7 dB.

1 0-5

1 0-4

1 0-3

1 0-2

0 1 2 3

R ()= exp (-2)

R ()= tr()R ()= J

0(2v

m)

s im u la tio n

(fk - f

0)T

b

BE

R



Average BER of unfaded orthogonal BFSK against the average number of active interferers per unit area, in the case of a large number of DSSS interferers that are distributed in the whole space excluding a protection zone of radius D0 {0, 0.1, 0.5, 1, 2} around the victim receiver. Eb/N0 = 10 dB, WTb = 100.


Mobile Mobile Innovation Innovation CentCenter (MIK)er (MIK)

Main objectives of the MIK– Supports research and development of high

speed mobile communication technologies including new technology directions, beyond of third generation mobile systems (B3G)

– Supports introduction of 3G/4G mobile technologies and services, installation of systems and applications based on such technologies, as well as their testing in an independent environment

– Stimulates establishment, development and application in practice of the newest mobile and wireless communication technologies/services

– Provides experimental field to universities and industrial companies, small- and medium size enterprises for close research-development co-operation


Members of the consortium– BME – Departments of Telecommunications

(co-ordination)– BME – Four other departments – ELTE – Department of Operations Research– PPKE – Faculty of Information Technology – Ericsson Hungary Ltd.– Nokia-Siemens Networks– Pannon– Siemens PSE Program and System Developing

Ltd. – Sun Microsystems Ltd. – Research Institute of Computer Techniques

and Automation– Magyar Telekom Nyrt.




Strategy, vision– The MIK is an institution built up on the basis

on university knowledge and the existing industrial background

– Dealing with research and development of wireless communication technology of the future (3G/4G)

– Has up-to-date wireless communication environment and testbed for development and testing of the newest mobile applications

– Strives for becoming a regional research and development centre in Hungary in its field of profession, and to stimulate settling of international “high-tech” companies to invest capital in our country. Thus, the Centre contributes to general improvement of technology level of the country, creation of new jobs



Long term tasks of the MIK– Geographical concentration of material and

intellectual resources – Wide involvement of university and Ph.D.

students into research and development, creation of new jobs, employment of young researchers

– Speed up of know-how and technology transfer. – Realisation of innovation environment

applicable for co-operation between; development of technologies, services, methods and their testing

– Providing assistance to small- and medium size enterprises of the region, incubation of foundation and operation of knowledge and technology intensive beginner („start-up”) and applying („spin-off”) enterprises



Tasks– Build up a flexible, heterogeneous testbed for

B3G system• „Multi-vendor”, „multi-operator” network

architecture • Connection to public wired and wireless

networks– Research and Development, Testing

• 3G/4G applications• Involve of PhD students and young scientists• Participation/initialisation in EU IST projects• Open up of the network infrastructure for

national and international companies for developing and testing their applications in a „real world” environment



Professional program– Mobile Radio Technologies

• Coexistence of mobile radio systems, radio channels• Improving quality of the radio transmission

– Integration and Management of Heterogeneous Mobile Networks• Integration and of heterogeneous wired and wireless

networks• Traffic modelling, network design and scaling• Safety and accounting problems of mobile systems• Real time multimedia information transfer• Elaboration of cohesive infrastructures for 3G and B3G

systems– Development of Mobile Services and

Applications• Development of mobile applications• Studies on user’s behaviour• Development of telecommunication service models,

formation of common platform


MIKMIKProfessional program (1.)Professional program (1.)

Coexistence of mobile radio systems, investigation of radio channels Investigation of potentials of radio coexistence/co-

operation of various mobile technologies (UMTS, WLAN, Bluetooth, 4. generation systems) and studies on questions essential to this radio channel modeling

Main task of the project is to define those network arrangements in case of which the mutual or one sided interference can appear. Apart of that based on measurements we elaborate such models by means of which inter-effect of various mobile technologies can be planned. We wish to take into account also the effects of other, non mobile, but broadcasting technologies (e.g. radar). In view of realization of access network modeling of the behavior of the radio technology, elaboration of electromagnetic field calculations, furthermore the possibly more exact knowledge of wave propagation features seem to be important for the cell design


MIKMIKProfessional program (2.)Professional program (2.)

Improving quality of the radio transmission Goal of the project is research, development and

implementation of techniques which enable increase efficiency of radio data transmission. The activities cover among others intelligent antenna systems, investigation of wave forms of radio interface and B3G detection techniques

Defense against adverse phenomena affecting propagation of radio waves and aimed to parlay of these effects methods have a great significance in view of broadband, economically effective and environment saving radio data transmission. The various diversity methods, multi input, multi output (MIMO) techniques, applicable adaptive modulation method, error correction coding and use of adaptive antennas enhances the reliability and the achievable speed and can reduce adverse effect of networks on the environment e.g. use of the radio station of less power


MMIKIK Professional program (3.)Professional program (3.)

Integration and of heterogeneous wired and wireless networks Main goal of the project is exploring integration

potentials of heterogeneous info-communication systems. Within this we focus on connection of wired and wireless systems, and the infrastructure and ad hoc mobile networks acting into account call transfer in heterogeneous mobile networks

Based on NGN concept we will study what protocols can be integrated into one common backbone network. Covered by sensor networks areas can be considered as an „intelligent environment”. Seamless data transfer in heterogeneous mobile systems. For optimization of the call transfer in the networks stochastic delay models should also be elaborated. This task is motivated by the fact that handover can degrade the QoS parameters. Interworking of different network protocols should also be realized


MMIKIKProfessional program (4.)Professional program (4.)

Traffic modeling, network design and scaling Goal of the project is modeling of types of traffic appearing

in mobile environment, having this investigation of scaling and design related questions of networks

Fundamental tool for scaling and control of mobile networks is the modeling of network traffic, of which conclusions can be drawn for the real situations. In heterogeneous mobile systems modified variants of traditional traffic models should be applied. In this field the following questions should be studied: traffic and queuing of mobile networks, algorithms of collision resolution, schedule protocols for support of real time traffic, call admission algorithms, investigation of transport (e.g. TCP) protocol in mobile environment, models of aggregate traffic between wired-wireless, as well as wireless-wireless networks. Subject of the project is elaboration of a P2P system which, is able to discover different network services in dynamic communication environment



Safety and accounting problems of mobile systems One of the goals of the research is survey of security

requirements of heterogeneous mobile technologies, analyses of efficiency of existing solutions and development of new security solutions and their implementation. Another well fitted area is the development and implementation of charging architecture and methods meeting requirements of the communication market of many actors

The project's attempt is to study mechanisms of authorisation, key distribution and dynamic key change also in such an environment, where great number of users freely come in or leave the system. Besides the copyrights of authors of digital contents should be defended (Digital Right Management (DRM)). According to newest OSA concept the content and network service shall be separated. As a consequence for the user, the operator, the content provider and the authorities need adequate and real-time accounting



Real time multimedia information transfer Investigation of procedures meeting service quality

requirements (QoS) in case of real time data transfer, including inter point-to-point and point-to-multi point QoS investigations as well

Studies on QoS support in heterogeneous mobile network environment and in mixed packet and line switched mobile communication networks are of high importance. One of our target tasks is to set up a real time network radio system, supports radio transfer of video, audio and enriched occasionally by text or facsimile for the public of many people. Our other goal is to build up of such a system which enables real time demand of stored contents (Video on Demand). In both cases important element of the service is securing the quality of the transferred content. Therefore we shall study how the representation of audio and video contents can be optimized


MMIKIKProfessionalProfessional program (7.) program (7.)

Elaboration of cohesive infrastructures for 3G and B3G systems Goals of the project are enhancement, research and

development of cohesive infrastructure determining in view of telecommunication infrastructure elements, which provide harmony between requirements and possibilities in the area against confidentiality and authority in IP technology, B3G systems and telephone public branch exchange

Goals of the project are basically of two directions: Development and investigation of AAI -

Authentication and Authorisation Infrastructure (AAI) for 3G and B3G systems.

Fitting of IP based telephone public branch exchanges to 3G and B3G systems



Development of mobile applications, investigation of application development and content handling solutions Development of supporting community and commerce

services mobile applications, furthermore investigation of software technologies needed for development of these applications. Introduction of the mobile communication technique and its integration into monitoring, remote checking and diagnosis of industrial objects. Further part task is establishment of content development infrastructure for testbed and application development

Within the project applications are also needed: for approval of testbed, simulation of real traffic situations, investigation of realistic application related problems. We investigate the infrastructure which includes content handling and enables flexible, manifold, multilevel application development (e.g. OSA/Parlay). We pay attention freely programmable operation system (Symbian, MS Smartphone, Linux, etc.) too



Development of mobile applications, investigation of application development and content handling solutions (cont.) Potentials of integration of mobile techniques by network

solutions applied in the process control in the various branches of the industry enables monitoring of the already built in data flow. (e.g. energy substations operated without human supervising, divided type field equipment, tube networks, pumps, boilers, wind power stations, transformers, vessels, wind power stations' parks). The GPS/mobile communication technique built on measuring and control systems of mobile objects (vehicles) shall be completed with assignment to location of diagnostic results (e.g. in diagnostics of railway sections, follow up of transporting hazardous waste vehicles, construction of questionable tachographs it serves safety purposes). In the project integration of mobile tools and process control systems; development of intelligent monitoring and diagnostic functions shall be solved.



Development of mobile applications, investigation of application development and content handling solutions (cont.) The content infrastructure standing behind the valuable

for the user applications is the part of new but identifiable individually part of the entire infrastructure. Elements of content infrastructure are among others data and procedures serving for identification of partners and resources (address stores, name fields etc.); catalogues assisting orientation in data stores, meta databases (standard data, coded into structure semantic information, data organized in hierarchy or nets, meta-data structures of a content infrastructure make possible search able and coherent on application level the contents); security and confidentiality resources (such is the infrastructure of certifications, digital signature and other authorization procedures, white and black lists of reliable and non-reliable sources, for example for spam-filtering, other data of authorized locations, virus databases etc.)


MMIKIKProfessional program (8.)Professional program (8.)

Development of mobile applications, investigation of application development and content handling solutions (cont.) Application - distribution strategy of the future shall be of

multi-platform like (Cross-media publishing, Create once, publish everywhere). Obvious test application areas: education and certain payable student services, part of which serves elaboration of broadcasting and interactive multimedia possibilities in experimental way and their demonstration (applications enabling mobile access to information network of the university e.g. „wireless room", wireless student administration, depending on location connected to university area services, broadcasting and archiving of lectures). The artificial speech functions are also included into access techniques (e.g. automatic text read out, control by speech, speech recognition etc.), which enables also integration of handicapped people into the information society



Studies on user’s behaviour Preliminary goal of the project is wide investigation of

user's behaviour and use of results in other projects of the Centre.

Spread of various mobile technologies affects and changes behaviour of users. The Internet and the next generation mobile technologies have been bringing unimaginable before applications and services, these will affect significantly behaviour of the users, again. Behaviour of individual users is different, but contain similar elements too on daily, weekly or even yearly level, which can be shown up by appropriate methods (e.g. sociological, network analyses, multivariable statistical and data mining methods). Knowledge of these behaviour samples promotes identification of various user groups and providing suitable for them electronic services and required content, prediction of expected acceptance of new applications. Handling of more and more complicate end equipment can be provided only by adequate multimodal user surfaces.



Development of telecommunication service models, formation of common platform Goals of the project are support of realizing software for

infocommunication services and intelligent mobile functions based on visual modeling languages with use of generative techniques, and establishment of uniform software platform for various mobile software systems

Tasks of the project are essentially two-fold: development of meta-modeling technique providing fast constructing of visual languages, flexibly satisfying the continuously developing requirement system, and realization of automatic code generation for tasks formulated on level of these visual languages (Domain Specific Languages, DSL). We wish to provide this by elaboration of adequate development methodology, meta-modeling techniques included into effective frame system. Different approach and character of different mobile platforms (Java, Symbian, Windows CE, etc.) made difficult work of developers


MMIKIK Some newest results (1.)Some newest results (1.)

Extension of radio access planning software system with new technologies and services

Development of professional MIMO antenna and receiver

• Operator-independent mobile terminal positioning systems and its implementation

• IMS-based click-to-dial services and the implemented elements of the intelligent office concept

• Realization of an intelligent client and gateway based remote control system that supports industrial object monitoring with mobile technologies

• Development of a WLAN-based localization system• Realization of a framework that supports the

development of context dependent (e.g. location dependent) applications

• Realization of a framework that supports platform interoperability

• Software framework that supports the processing of huge amount of data for users behavior and identification


MMIKIK Some newest results (Some newest results (22.).)

• Sensor network and SMS gateway• WiFi dynamic direct communication• SOMOSI user mobility and source modeling

software• HSDPA schedulers, HSDPA simulator• VMTS system• Thin client based far management solution• CM system• Location based Parlay application• Cellular phone measurement• mVPN• QoS driver• Mobile ticket• Experimental development of new user interface

prototypes• Digital beamforming (DBF)


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