Fibre Optic Networks for Distributed, Extendible Heterogeneous Radio Architectures and Service ProvisioningFUTON Integração de redes sem fios heterogéneas tendo como alvo a rede 4G
Some Wireless Trends • Provide answer to the growing demand for wireless services • Solution • With a cellular planning reduce the cell size • Provide answer to the need for a broadband component • Solution • Exploit the rich scattering properties of the wireless channel using multiple Tx/Rx antennas (MIMO concepts)
BTS BTS BTS BTS The Conventional Cellular Architecture an the trends I • Wireless Cellular Networks: Architecture Core Network External Networks RSS BSC • BTS (GSM) or Node B(UMTS) • Layer 1 Processing & basic RRM • BTS’s connected to the BSC (RNC) through cable or microwave links • In either case the data is regenerated at the BTS (Node B) • Space multiplexing by treating radio signal from other cells as unknown interference
The Conventional Cellular Architecture an the trends II • What the scaling problem with such an architecture? • When the cell size gets smaller and smaller • Path loss exponent reduces towards 2 • Interference from other cells increase • Capacity per cell decreases • Capacity (users/Km2) does not scale linearly as the cell size reduces • Solution • To modify the architecture so that the signals from other cells is not seen as interference
BTS RAU BTS RAU BTS RAU Solution Reduced processing RSS Central Unit Joint Processing (detection coding, resource managing) RNC Service data Radio signals transported transparently Allows soft combination at the CU. Signals from different cells not treated as interference
Transmitter Precoding Receiver Processing The point to point capacity problem • MIMO • Separate streams at the antennas multiplexing gain (R=min[Mt, Mr]) • But achieved only if the channel is rich scattered • But in mobile application, outdoor channel does not have too many major scatterers, resulting in strongly correlated channel • capacity scaling not achieved • Furthermore when more than one pair of MIMO users exist, interference to each other still exists, implying the requirement of joint processing of multiple pair of MIMO links • Solution: Build a MIMO system with far apart antennas
Solution • The network capacity problem and the point to point capacity problem point to the same solution • Perform a joint processing of spatially separated radio signals • Build an infrastructure that collects / distributes the radio signals from the different antennas • The technology to build that: optical fiber
Conventional Rationale for RoF • Generalized RoF network for application in cellular networks is a resurgent idea but up to now not has not taken place • Why? • RoF has always been thought of as a remoting or extension component • Optical components still expensive to provide a clear balance towards the use of remote antenna units in 2-3G • May it change now? • Trends call for a joint processing of distributed radio signals what is needed is much more than remoting • Shift the vision of RoF as a remoting component to an aggregating one THIS THE OBJECTIVE OF FUTON
FUTON Basic Architecture Optical fiber RAU FO Interface RNC Joint Processing (detection coding, resource managing) RoF Mgmt Central Unit Hybrid Optical-Radio Infrastructure
FUTONArchitecture • But we can get much more from the infrastructure • With multiband RAU, the capacity of optical fiber allows: • The RoF infrastructure to be shared by different systems / operators Potentialities to exploit either at the technical or business levels • Technical level • Processing of multisystems at a single location facilitate the design of efficient cross-system algorithms / protocols • Interoperability • Business level • Owner of the RoF can be third party • Existence of an infrastructure that can be rented will facilitate the entrance of new service providers
Futon Objectives • Technical level • Design and provide proof of concept for a hybrid optical-radio infrastructure enabling 1Gbit/s and 100Mbit/s wireless communications for pedestrian an high mobility environments respectively • Exploit the potentialities offered by the infrastructure and develop mechanisms for inter-system coordination and optimum usage of the radio resources and provide the proof of concept. • Deployment/ business level • Evaluate the implications on the current wireless architecture models of the FUTON concept, determine cost models for upgradeability / replacement and provide roadmaps for evolution.
The Consortium 3 major equipment manufacturers, 3 operators, 4 universities, 3 research centres and 3 SME’s. The Expertise Capacity to have a prospective vision of the most likely scenarios for the evolution of telecommunications and capacity to evaluate the impact of solutions proposed. Three operators: Portugal Telecom, OTE and VIVO Capacity to propose and evaluate solutions, for the technological issues recognized as key aspects for the development of future wireless and optical systems. Strong research teams from laboratories and universities. Capacity to filter and validate the technological proposals based on their expected commercial value and make the translation to prototypes. Three large telecom equipment manufacturers, Motorola, Alcatel-Thales (III-V Lab) and Nokia Siemens Networks. Specific expertise on dedicated topics. Three SME’s: Acorde ( RF design for radio over fibre), Jaytech ( software tools for network evaluation) and Sigint (implementation of middleware solutions). Consortium and Expertise
Key Facts • Effort: 920.5PM; • Budget Total: 9.85M€ • EU Contribution: 6,58M€ • Budget Distribution • Per category • RTD related activities: 91,4% • Management related activities: 4,1% • Other (Dissemination and training): 4.5% • Per type of organization: • Large industry: 35,2% • SMEs: 14,3% • Universities: 24,2%% • Research Centres: 26,3%
The Implementation I • Phased Approach - Each Phase is characterized by a major milestone and basic objective • phased development will allow an adaptation to actual developments in technology, international standardisation, regulation and political environment • Phase I FUTON • devoted to the detailed specifications of scenarios, capture of requirements, identification of business cases and the development of the key enabling technologies. • Key objective of this first phase is to develop the technologies that will be needed in the second phase to demonstrate in field trials the FUTON concept. • Main milestone of FUTON to reach at month 30 is to have the key building blocks developed and tested and a first system level evaluation performed. • Key objective of Phase II: FUTON concept physically validated. • This second step will therefore be devoted to the optimization and hardware validation of the subsystems, integration, set up of trials for technology demonstration and system level evaluation.
Outcomes System concept Detailed scenarios and specifications. Theoretical concepts and implementation Distributed Broadband Wireless System(DBWS) specified ; RoF infrastructure: definition completed; RoF management unit: Specifications completed; First version of Remote Antenna Units (RAU) and optical link implemented and tested; Middleware and radio resource management: initial convergence algorithms integrated in laboratory with version 1 of the optical links and tested; Basic prototyping of DBWS developed and test with version 1 of optical link. System Analysis and Evaluation System level simulator developed; System level capacity and performance results obtained; Techno-economical analysis performed. System concept DBWS Specifications and Basic Tests Middleware and radio resource Lab Demos management Optical Components & Links Management unit of the RoF Theoretical concepts and implementation System Level Analysis and Evaluation Phase I - Components and Outcomes Components of FUTON
WP1 Management • Objectives: • Interface between the Project and the European Commission done by the Project Coordinator (CO) whose role is to:. • Provide the consortium with a complete management process (tools & methodology) and project Secretariat (administrative, financial & contractual). The Coordinator with both the Quality Manager and Technical Manager will be responsible for : • Provide technical quality control through the technical steering group.
WP2 - Scenario Definition System Requirements, Business and Deployment Models I • Objectives: • To define the overall FUTON system architecture guaranteeing, at the services and management level, seamless inter-working between existing and future wireless systems. • To identify relevant scenarios envisaging future cellular systems - B3G (Beyond 3G), 4G and distributed broadband wireless systems (DBWS) - on which the FUTON centralized system served by a distributed antenna system based on RoF can be assessed. • To specify the optical/radio interface features of the wireless systems envisaged by the project which are the input to other work packages. • To find out new deployment models regarding the FUTON concept. • To evaluate the business potential of the proposed system to provide broadband wireless services.
WP4 - Network convergence and cooperative control for RoF distribution networksI • Objectives: • Definition of the FUTON middleware architecture. • Design, implementation and validation of the FUTON middleware for coordinating and executing connection management procedures over heterogeneous networks. The Futon middleware is envisaged that will have direct interaction with the RoF network manager which will be passing network information to the Futon middleware. • The inclusion of radio resource management techniques that will use the available frequency spectrum efficiently, and will honour, to the best possible extent, the users’ QoS requests. • To investigate vertical hand-off procedures for session continuity over RoF networking environments: • Design, implementation and validation of link configuration and context information. • Design, implementation and validation of network discovery mechanisms • Design and development of cross layer algorithms. • Design, implementation and validation of link selection algorithms/protocols assisted by RoF network state information. • Demonstrating the FUTON middleware functionality.
WP5 - Architectures, components and subsystems for Radio over Fibre I • Objectives: • • Design, implement, and test at the Physical layer, the radio-optical interfaces, links and topologies and architectures required to provide the necessary performance for meeting the FUTON network objectives
WP6 - Management of the RoF infrastructureI • Objectives: • Design a flexible solution capable of managing the infrastructure for the RoF Network. The management solution must cope with the provisioning, the fault-detection and performance management of the RoF infrastructure
WP7 - System Level Evaluation I • Objectives: • Definition of performance evaluation metrics based on WP2 scenarios. • Definition of methodology for usage of the results of WP3-5 • Development and validation of system level simulation platform for evaluating the impact of RoF networking, PHY and MAC algorithms/protocols on global system performance. • Performance assessment of promising algorithms/protocols developed in the scope of WP3, 4, and 5. • FUTON feasibility evaluation.
WP8 Dissemination, training and exploitation I • Objectives: • To promote the FUTON system concept by highlighting its competitive advantage in comparison to competition. • To identify exploitation opportunities for individual products and partners. • To prepare the exploitation plan for the project results. • To identify R&D activities with similar objectives regarding the broadband wireless sector and relate to those activities in order to enhance product acceptance. • To participate and contribute in the appropriate standardisation bodies and promotion activities. • To ensure technical and scientific dissemination of the project results through publications in workshops conferences and journals.