The Progress of National 973 Project Cognitive Wireless Networks

Transcription

1 The Progress of National 973 Project Cognitive Wireless Networks Presenter: Zhang Ping Beijing University of Posts and Telecommunications 1

2 CONTENTS Introduction of 973 Project Research Background The key issues in Cognitive Wireless Networks Applications scenarios What we have done 2

3 Project Information National Basic Research Program of China (973 Program): Title: Research on Basic Theory and Key Technologies of Cognitive Wireless Network (2009CB320400) Executive Time: Chief Scientist: Ping Zhang Funding: about 30million Yuan Number of Partners: Eight 3

4 973 Project Introduction The National Basic Research Program Project, which has features like strategy, prediction, globe and motivation, is created on the basis of existing research activities and deployments to organize and implement basic research to meet the national major strategic needs as well as to further reinforce basic research and scientific technology work. development and progress of scientific technology Add Your Text National Key Basic Research Add Your and Development Text Plans (973 Project) strategy concept Prediction Concept Globe Concept Concept Motivation

5 Objectives for 973 project Objectives for 973 project Strengthening the original innovations and to address the important scientific issues concerning the national economy and social development Improving China's capabilities of independent innovations and to providing scientific support for the future development of the country

6 Tasks for 973 project Conducting multidisciplinary comprehensive research and providing theoretic and scientific foundations for important scientific issues Deploying relevant, important and explorative forefront basic researches Training outstanding person with high scientific qualification and creative capability 973 Project Main Tasks Building a group of high-level scientific and technological research centers

7 CONTENTS Introduction of 973 Project Research Background The key issues in Cognitive Wireless Networks Applications scenarios What we have done 7

8 Motivation 1: Requirement of Spectrum Field test of Spectrum Occupation (Time: from 8 p.m., Mar 16, 2008 to 8 p.m., Mar. 17, Scenario: typical urban area, Location: BUPT Campus) Test Results: Contradition between Spectrum is scarce natural resource Spectrum efficiency is the shortage and the Less than 5%, National Radio Management Committee waste of Spectrum surprisingly similar waste is the main to the data cause of low efficiency released by FCC Actual Status Occupation of FS allocation Ratio

9 Motivation 2: Heterogeneity Radio Networks Developing Trend: Heterogeneous Ubiquitous Broadband Heterogeneity: distinct architectures, models and schemes of different networks, in accordance with different goal and requirement, lead to various network islands Home Network AP PAN RGW Ultra-high speed access AP WLAN C AP MBWA AP AR CN AP Ad-hoc Network AR C 2G. 3G.4G Mobile Communications Digital Broadcast networks Broadcast Home Linear-Cell Pico-Cell Micro-Cell Macro-Cell Mega-Cell 9

10 Problems caused by Heterogenerous Wireless Networks B3G/4G? Too many antennas, BSs, causing resource waste and compatibility difficulties GSM Single-Mode Dual-Mode Multi-mode? 10

11 Current Status of Wireless NW Coexistence of various RATs and the scarcity of Spectrum resource is holding back wireless mobile communications from evolving towards wide-band and ubiquity. Hence, there s an urgent demand for innovation of wireless networks technologies, aiming at dynamic and efficient use of FS, and solve the issues on heterogeneous wireless networks. Recently, many countries are devoting their intellectual and financial resources to working on the two aspects. 11

12 CONTENTS Introduction of 973 Project Research Background The key issues in Cognitive Wireless Networks Applications scenarios What we have done 12

13 Analysis of the Essential Problem Scarcity and Waste of Spectrum Problems Failure of Wireless NWs to converge REASON Solution? Static close NW can t t adapt to dynamic enviroment Conclusion How can wireless NW Adapt to complex dynamic environment 13

14 Introduction of Cognition Theory Cognition theory offer a decent manner to solve these problems, as well as a theoretical support. Information Knowledge Intelligence Cognition Strategy Knowledge Data Base Goal Acquisition Problem/ Environment Execution 14

15 What is Cognitive Wireless Networks () End-to to-end Goal Cognition Reconfiguration Observe Observe Cognitive Wireless Cognitive Networks Wireless Network Wireless Act Act Decide Cognition Decision Decision Reconfiguraion Radio Environment Network Environment Service Environment Autonomous Control Dynamic Decide Optimization Decide Transmission Mode Network Resource Service

16 Scientific Issues in How to acquire, express, communicate and utilize the cognitive info. among multi- : singleobject to multi-object cognition; domain passive cognition to active cognition including radio, networks and users environments? Cognition Adaptability of Cognition Multi Reconfiguration of System -domain Architecture Environ Cognitive Obser Act ve -ment Wireless Networks decide Autonomy of Decisionand Control According to multi-domain cognition, aiming at end-to-end goal, automatically adjust elements in NW in order to adapt to complex dynamic environment Architecture Reveal the restriction What and principle is the restriction between and principle architectural based on elements the adaptive attribute and the of reconfiguration ability of and cognition, the architecture? autonomy and reconf. How to decide and control to achieve overall performance optimization, under complex dynamic environment? 16

17 Two Definitions Joseph Mitola proposed the concept of cognitive radio for the first time in 1999: Radios that change the parameters of transmitters based on its interaction with environments Our definitions for Cognitive Wireless Networks: wireless networks that change network features based on its interaction with multi-domain environments Our definitions suggest wireless networks with cognitive functions (intelligence);optimizing aims at global optimization of end-to-end purpose; Cognizing is active and in multi-domain;network components can be reconfigurable To solve problems of spectrum utilization efficiency and convergence of heterogeneous networks 17

18 Cognitive Wireless Networks adaptive reconfigurable intelligence Cognitive (adaptive, reconfigurable) networks Cognitive networks are capable of continuously adapting to changing environmental conditions and/or user needs. Adaptation is mainly realized by means of selfmanagement, or in other words in accordance with autonomic computing principles, and typically involves machine learning. Reconfiguration of the systems own infrastructure may affect more than just the traditional networking layers of the protocol stack, i.e., the middleware, presentation and application layers in addition to the physical (PHY), MAC (Medium Access Control), LLC (Logical Link Control), network, and transport layers.

19 Cognitive Wireless Networks Cognitive wireless networks do not presume the fixed deployment of technologies in terminals and network segments; rather, they have embedded intelligence that enables them to learn, from previous interactions with the environment, and, based on those interactions, adapt their functionality according to different external stimuli. Cognitive wireless networks have been proposed for the realization of the B3G vision, with reduced CAPEX. This is achieved through their inherent ability to adapt to varying requirements (e.g., change RATs and spectrum at the PHY/MAC layers). Change RATs Have cooperative networks to operate different RATs Change spectrum spectrum sensing and allocating

20 The key issues in Cognitive Wireless Networks Cognition Spectrum Sensing Cognition of wireless environment, network environment and service environment (Multi-domain) How to process and use acquired information Cognitive enablers Intelligent adaptation Dynamic spectrum management, Spectrum sharing, Spectrum Mobility Joint Radio Resource Management Power Control Self-x (Self-configuration, Self-healing, Self-optimization, Selfprotection) of wireless network Reconfiguration The capabilities of reconfigurable Networks Reconfigurable Protocols Software Download Reconfiguration of transmission mode Others System architecture of Cognitive Wireless networks Protocol Cross-layer Design

21 CONTENTS Introduction of 973 Project Research Background The key issues in Cognitive Wireless Networks Applications scenarios What we have done 21

22 Application Scenarios(1) Application Scene1 The effective using of spectrum The process of cognitive network Non-cognitive network Cognitive network Spectrum hole TV transmission tower Wireless MIC Spectrum has requirement Not able Service to satisfy the requirements requirements are satisfied For preliminary study, dynamic spectrum management could improve the utilization of spectrum by 39% (Broadcasting and TV spectrum segments are used with other network) Relay node Wireless Mic 22

23 Application Scenarios(2) Emergency Communication-Resolving the issue of island of heterogeneous networks Non-cognitive Terminal Cognitive Terminal Cognitive Terminal Cognitive Terminal CDMA Single node Reconfiguration cognitive Non-cognitive Terminal Cognitive Terminal Single node cognitive Reconfiguration Network assistant cognitive Cognitive network Base Station 23

24 Application Scenarios (3) The integration terminals in the heterogeneous networks Multi-mode G C W TD... GSM Singlemode Dual-mode Variable-mode 24

25 CONTENTS Introduction of 973 Project Research Background The key issues in Cognitive Wireless Networks Applications scenarios What we have done 25

26 The Project Partners Beijing University of Posts and Telecommunications Harbin Institute of Technology University of Electronic Science and Technology of Xi an University of Electronic Science and Technology PLA University of Science and Technology The 61th Institute Zhejiang University Wuhan University

27 Research Contents Subject 2: Multi-domain Cognition Theory System in Wireless Network Subject 1: Cognitive Wireless Network Architecture and Protocol Design Subject 3: Active Cognition Methodology in Wireless Network Multi-domain Environment Awareness Cognitive Radio Network Architecture Adaptiveness Subject 6: End-to-End Reconfigurable Mechanism Subject 4: Intelligent Dynamic Network Resources Management Modeling and Control Mechanism Autonomy of Decision-making and Control Subject 5: Transmission mechanism Based on Cognition in Wireless Network Subject 7: Demo Platform Construction and Experiment 27

28 Subject 1 of 973 Project Task Name Cognitive Wireless Network Architecture and Protocol Design Multi-plane Architecture Design Research Topics Members Design of Prototyping Protocols with Cognition, Adaption and Reconfigurability Performance Optimization Cognitive Service System Satisfing End-to-end Efficiency Subject Leader: Professor Jiaru Lin Beijing University of Posts and Telecommunications Wuhan University

29 Subject 2 of 973 Project Task Name Multi-domain Cognition Theory System in Wireless Network Multi-domain Cognition Architecture and Models Research Topics Spectrum Cognition Theories and Methods Multi-domain Local Cognition Theories and Methods Multi-domain Cooperative Cognition Theories and Methods Members Subject Leader: Professor Desheng Zhu PLA University of Science and Technology Harbin Institute of Technology

30 Subject 3 of 973 Project Task Name Active Cognition Methodology in Wireless Network Multi-domain Active Cognition Models in Research Topics Active Learning and Deducting Theories and Methods Knowledge Sharing and Reusage in Cognitive Strategies Studies in Dynamic Environments Members Subject Leader: Dr. Quan Yu The 61th Institure of the Headquarters of the General Staff of PLA PLA Institute of Technology

31 Subject 4 of 973 Project Task Name Intelligent Dynamic Network Resources Management Modeling and Control Mechanism Theories and Methods of Vector Resources Allocation Research Topics Resource Mobility Controlling Theories and Methods Adaptive Deciding Models and Schemes of Dynamic Resource Management Joint Management of Inter-network Resources Subject Leader: Professor Jiandong Li Members University of Electronic Science and Technology of Xi an The 61th Institure of the Headquarters of the General Staff of PLA

32 Subject 5 of 973 Project Task Name Transmission Mechanism Based on Cognition in Wireless Network Transmission Capacity Analysis in Research Topics Transmission Mechanisms Approximating Capacity Auto-management and Adaptive Schemes in Transmission Members Subject Leader: Professor Wei Guo University of Electronic Science and Technology of China Zhejiang University

33 Subject 6 of 973 Project Task Name End-to-End Reconfiguration Mechanisms Modeling and Construction of End-to-end Reconfiguration Administrating Framework Research Topics Members Fine-grained Decomposition and Function Re-composition of Network Behaviors Feasibility and Approaches of Network and Protocols Reconfiguration Evaluation of Efficiency and Security of Reconfiguration Subject Leader: Professor Zhiyong Feng Beijing University of Posts and Telecommunications

34 Subject 7 of 973 Project Task Name Cognitive Wireless Network Prototyping Platform Construction and Tests Construction of Multi-plane Adaptive Architecture Research Topics Evaluation of the Principles and Schemes of the Multidomain Cognition Evaluation and Demonstration of Key Technologies within Evaluation of the End-to-end Efficiency of Members Subject Leader: Professor Ping Zhang Beijing University of Posts and Telecommunications

35 What we have done -other topics Cognitive Pilot Channel Design of an in-band/out-band CPC scheme Design of a CPC based network selection scheme Self- configuration of Wireless Networks Plug-and-play technology used in base station equipments Research of working state and channel selection scheme of multi-mode access point Reconfigura ble Protocols Component-based Protocol Stack Management for Reconfigurable System Evaluation mechanism for Protocol Components for Reconfigurable System

36 CPC Structure Approach The goal of CPC: To support an efficient discovery of the available radio accesses and reconfiguration management in a heterogeneous wireless environment between network and user terminals CPC is anticipated to be a combination of two components: Out-band CPC and the In-band CPC Out-band is a Physical channel outside the component radio access technologies In-band refers to logical channel within the component radio access technologies As radio enabler, CPC is also anticipated to have both downlink and uplink components

37 Background of CPC Downloading the Mike lives in Shanghai, software of using WCDMA CDMA2000 in daily life; Mikes We obtains suppose network that Mike context prefers to use high speed RATs and Mike s The train Mike s his terminal Mikes leaves terminal obtain reconfigures the station reconfigures network and broadcasted on CPC: has stored the to context access moves itself software for both CDMA2000 to along to Hiperlan the WCDMA broadcasted railway and A and and D: Hiperlan; using and access the software Mike on CPC attaches to stored. about BS4. to all He wants BS1 again cells BS2: to CDMA2000. go and information: to Hangzhou then BS2. BS3: CDMA2000; by train. Mikes again obtains BS4: WCDMA. the network context broadcasted on CPC and download software of WLAN, and attach to the B station WCDMA CDMA2000 Hiperlan IEEE802.11

38 Demo System from BUPT CPC Assisted Terminal Initialization CPC Assisted Network Selection CPC Demo System Goal Demonstrating the complete end to end reconfiguration process in future communication system JRRM Software Downloads Evaluating the CPC performance JRRM Guided Network Accessing SW Downloads Enabled Terminal Reconfiguration

39 Overview of Demo System Key Conception CPC Server JRRM Server Software Server Reconfiguration Terminal Traffic Channel GSM b g CDMA CPC Channel Out-band CPC

40 System Components Overview CPC Server JRRM & Software Server Reconfigurable Terminal AP1( g) AP2( b)

41 Demo on CPC Mechanism CPC This Now After starts CPC Server that, CPC CPC starts to of turning-on is send CPC interface to CPC collect Server on interface information is network like Collection thisinformation to terminal and Delivery periodically WLAN CPC Server CPC Internet JRRM Server On-Demand Module (GSM/GPRS/CDMA/WLAN) Internet Software Server From now on, the reconfigurable terminal can start to work normally Reconfiguration Terminal (GSM/GPRS/CDMA/WLAN)

42 Demo on Software Downloads Software Mechanism Download of Software Process Downloads to Enable Network Handover CPC Server Internet WLAN JRRM Server On-Demand Module (GSM/GPRS/CDMA/WLAN) SW SW Server Internet WLAN GSM Req Reconfiguration Terminal (GSM/GPRS/CDMA/WLAN) Once the terminal try to handover to a new the network according to the CPC the terminal sends a request to to the the instruction, SW and it have none software (e.g. SW Download Server network protocol) through GSM of the new channel, network, asking the for software for WLAN-related download process starts software If If the the terminal wants to to After handover the the SW SW from Downloading, from GSM to to WLAN the the terminal can can be be reconfigured into into WLAN mode. And And the the network handover is is enabled.

43 Demo on JRRM Scenario on JRRM CPC Server Internet RPL JRRM Server WLAN Internet SW Download Server Req Reconfiguration Terminal (GSM/WLAN) If If the the current current working network is is GSM, WLAN, GSM, WLAN, the Once the Once terminal the the terminal sends sends detect the detect the request that that the the to to JRRM JRRM Server Instruction Server through from from GSM. Internet. CPC GSM. CPC is is not not available, it it Once starts Once starts the the request request JRRM JRRM the the Server Server JRRM JRRM receiving server serverfor for the the the the request, Access Access instruction it it returns returns the the instruction through GSM, Internet, GSM, too too too too

44 CPC Demo System in EU In ICT-Mobile Summit2009, in June 10~12, EU FP7 E3 obtain the Best Demonstration Stand

45 Future Work Demo system Evaluating the CPC performance Out-band CPC (On-demand mode) In-band CPC CPC Extension with CDMA Channel Delivery Delay Delivery Approach Required Bandwidth Evaluating the JRRM function Joint Admission Control Joint Load Balancing Joint Scheduling

46 Future Work Standardization of CPC Recently, several proposals have been proposed to different standardization organizations. Proposals on CPC architecture and CPC management will be proposed to worldwide standardization organizations. IEEE ITU-R ETSI WWRF Performance evaluation for the implementation of CPC will be carried out.

47 Reference J. Mitola. Cognitive Radio. In PhD thesis, Royal Institute of Technology (KTH), Stockholm, Sweden, Miao Pan, Jie Chen, Ruoju Liu, Zhiyong Feng, Ying Wang, Ping Zhang, Dynamic Spectrum Access and Joint Radio Resource Management Combining for Resource Allocation in Cooperative Networks, WCNC, Vanbien Le, Zhiyong Feng, Ping Zhang, Yi Huang, Xiaomeng Wang, A Dynamic Spectrum Allocation Scheme with Interference Mitigation in Cooperative Networks, IEEE Wireless Communications and Networking Conference 2008, Mar E2RII White Paper, The E2R II Flexible Spectrum Management (FSM) Framework and Cognitive Pilot Channel (CPC) Concept Technical and Business Analysis and Recommendations, November J. Pérez-Romero, O. Sallent, R. Agustí, L. Giupponi A Novel On-Demand Cognitive Pilot Channel Enabling Dynamic Spectrum Allocation, IEEE DySPAN, April 2007, Dublin. COGNITIVE PILOT CHANNEL(CPC) Cellular Based Solution, Pascal Cordier, WWRF20 / WG6, April 2008, Ottawa.

48 Projects on Cognitive Wireless Networks Domestic Projects: : National Basic Research Program of China (973 Program): Basic Research on Cognitive Wireless Networks(2009CB320400) : NSFC (Natural Science Foundation of China ) Project: Research on Architecture and Key Technologies of Autonomous Endto-end Reconfigurable Radio Networks( ) : NSFC (Natural Science Foundation of China ) Project: Research on Resource Management Based on Cognitive Technology : National 863 Program of China: Research on key technologies of Reconfigurable Radio Networks (2006AA01Z276) EU Co-operation Projects: : EU ICT FP7 Integrated Project: E3(End-to-end Efficiency)(FP7-ICT ) : EU IST FP6 Integrated Project IST-E2R(End-to-end Reconfiguration) II (IST )

49 Thank You for Your Attention! Address: Wireless Technology Innovation Institute,P.O.Box 92 Beijing University of Posts and Telecommunications No.10,Xi Tu Cheng Road,Beijing,100876,China Tel: Fax: Website: