wireless pan, lan and man 研究群研究能量與研發成果. –sensor networks 曾煜棋、陳...

Wireless PAN, LAN and MANWireless PAN, LAN and MAN 研究研究群群研究能量與研發成果研究能量與研發成果

– Sensor networksSensor networks 曾煜棋、陳健、趙禧綠、王國禎、簡榮宏、易志偉曾煜棋、陳健、趙禧綠、王國禎、簡榮宏、易志偉

– WLANWLAN 曾煜棋、趙禧綠、王國禎、簡榮宏、曾建超、王協源曾煜棋、趙禧綠、王國禎、簡榮宏、曾建超、王協源

– Mesh networksMesh networks 曾煜棋、陳健、趙禧綠、王國禎、簡榮宏、易志偉曾煜棋、陳健、趙禧綠、王國禎、簡榮宏、易志偉

– WiMaxWiMax 陳健、趙禧綠、簡榮宏陳健、趙禧綠、簡榮宏

Members and Research Members and Research DirectionsDirections

研發成果研發成果

A Cross-Layer Control Scheme for VoIP application over 802.11e Wireless Local

Area NetworksCross layer VoIP over 802.11e WLANPolicy based 802.11e Network

RADIUS Server

(1)

(2)

(3)

(1) Association(2) Access-Request (3) Access Accept + Service Level Agreement

AC_VO=1

AC_VI=0

MS2MS1

AP

RSSImax0

GSM-8K13.2kbps

G.71164kbps

LPC5.6kbps

GSM-16K26.4kbps

A B C D

Cross-layer VoIP Application

IEEE 802.11e MAC Protocol

Application Layer

Transport Layer

Network Layer

Data Link Layer

Physical Layer

UDP

IP

Physical

• Motivation: Let VoIP adapt to time-varying wireless channel condition.

• Mechanism Select VoIP codec according to current RSSI

• Measurement Metrics: One-way delay, Mean Opinion Score (MOS)

• Motivation: Centralized admission control scheme for 802.11e WLAN.

• Mechanism Modify RADIUS message to carry Service Level Agreement (SLA)

• Classification: Classify by client can be simpler than by flow

A Medium Access Protocol for Multi-Channel A Medium Access Protocol for Multi-Channel Multi-Interface Wireless Mesh NetworkMulti-Interface Wireless Mesh Network

Multi-channel hidden terminal problem

Hybrid channel assignment

A1

Fixed interface Switchable interface

B

A2

C

3 3

A3

D

3

A B C D

RTS

CTS CTS

RTS

Collision

DATAChannel 1

DATAChannel 2

Wireless Mesh Network• Let APs connect to Internet without wired connection• Utilize multi-channel and multi-interface to increase network capacity• The 802.11 MAC protocol doesn’t support multi-channel and multi-interface

An Implementation of IEEE 802.16e General Handover Emulator

Internet

Base Station 1(serving BS)

Base Station 2(target BS)

Echo Server

MS

1

2

34

HO_OUT

HO_IN

HO_IN

HO_OUT

802.16 connections

Backbone network connections

Tunneling

Emulation Topology

Implement Components:• MAC layer frames• Network layer frames• Neighbor Table• MAC and IP address map• Data buffering• Data tunneling

•To implement an IEEE 802.16e emulator for further research and application development.• IEEE 802.16d, IEEE 802.16e

A Distributed Time-Slotted A Distributed Time-Slotted Multi-Channel Protocol Multi-Channel Protocol

for IEEE 802.11 Wireless Mesh Networksfor IEEE 802.11 Wireless Mesh Networks

Fig. Wireless Mesh NetworkMotivationThe idea of exploiting multiple channels is appealing in wireless mesh networks because of theirhigh capacity requirements to support backbone traffic.GoalTo reduce interference of the wireless mesh networks by using multi-channel.

Integrating SIP and IEEE 802.11e to Support Integrating SIP and IEEE 802.11e to Support Handoff and Multi-grade QoS for VoIP Handoff and Multi-grade QoS for VoIP

ApplicationsApplicationsGoal:Goal:1. Guarantee QoS of each admitted

VoIP call and achieve early resumption of resources even when handoff occurs.

2. Fairly distribute network resource and improve channel utilization.

AnalysisAnalysis1.1. Analytical Model: Analytical Model: A Y-dimension model. Take transmission rate into

consideration.2.2. Performance Analysis: Performance Analysis: Using recursive techniques

based on boundary cases.

Ex: IEEE 802.11e WLAN (Y=4)

A Push-Based VoIP Service for an Internet-Enabled Mobile Ad Hoc Network

An Ad Hoc Network-Based VoIP Service Platform:

Integrating MANET and cellular networks, we propose an MANET-based VoIP service platform. Possible Applications:

- Indoor: home VoIP system- Outdoor: provide mobile VoIP service on bus, train…etc.

However, connecting cellular networks incurs charges and power consumption.

A new node, called push server, is proposed. A push mechanism is developed. System Architecture

Resource Allocation and Packet Forwarding Resource Allocation and Packet Forwarding in Multi-radio Multi-mode Multi-channel in Multi-radio Multi-mode Multi-channel Multi-rate (Multi-rate (MM4) Wireless Mesh Networks4) Wireless Mesh Networks

Much higher throughputMuch higher throughput

Linear Programming FormulationLinear Programming Formulation

Graph representationGraph representation

MM44 wireless infrastructure mesh wireless infrastructure mesh

Utilizing MUtilizing M44 benefits and traffic splitting benefits and traffic splitting

Joint Multi-Channel Link layer and Multi-Path Routing Design for wireless Mesh

NetworkA WMN is two-tier architecture:

•Forming a wireless backbone

•Providing large coverage

•Offering strong connectivity

•Producing high robustness

An Adaptive Quorum-based Mechanism for the Clock Asynchronism Problem in

IEEE 802.11 MANETsThe Concept of Quorum:The Concept of Quorum:• Grid-based QuorumGrid-based Quorum

…

…

……

0 1 2 … … n-1

n n+1 n+2 … … 2n-1

2n 2n+1 2n+2 … … 3n-1

… … … …

… … … … …

(n-1)*n … … … n2-1

n

n

…

…

……

0 1 2 … … n-1

n n+1 n+2 … … 2n-1

2n 2n+1 2n+2 … … 3n-1

… … … …

… … … … …

(n-1)*n … … … n2-1

n

n

Protocol Design:Protocol Design:n2 beacon Intervals n2 beacon Intervals n2 beacon Intervals n2 beacon Intervals n2 beacon Intervals

…

…

……

0 1 2 … … n-1

n n+1 n+2 … … 2n-1

2n 2n+1 2n+2 … … 3n-1

… … … …

… … … … …

(n-1)*n … … … n2-1

n

n

quorum interval

Beacon Beacon

non-quorum interval non-quorum interval

Beacon

Beacon

Adaptive Attenuation Factor Model Adaptive Attenuation Factor Model for Localization in Wireless Sensor for Localization in Wireless Sensor

NetworksNetworks• Adopting a centralized architecture to localize sensor nodes Adopting a centralized architecture to localize sensor nodes

• Dynamically measuring n and X locally to increase the accuracy of localization Dynamically measuring n and X locally to increase the accuracy of localization

UN: Unknown Node

IRN: Initial Reference Node

Fusion Center

Wireless Communication

1. Neighbor-Probe Request

3. Neighbor-Signals Response

2. Signal StrengthB

C

A

D

E

F

G

H

I

J

K

An Integrated Call Agent of the Converged VoIP Network

ITRI MGCP protocol Stack

RGW

TelephoneMicrosoftNetMeeting

NCTU SIP Proxy

ITRISIP-UA

OpenH323

ITRISIP Protocol Stack

OpengateGatekeeper

NCTUICA

or OpenPhone


RGW


NCTU SIP Proxy

ITRISIP-UA

OpenH323


OpengateGatekeeper

NCTUICA

or OpenPhone


RGW


NCTU SIP Proxy

ITRISIP-UA

OpenH323


OpengateGatekeeper

NCTUICA

or OpenPhone


RGW


NCTU SIP Proxy

ITRISIP-UA

OpenH323


OpengateGatekeeper

NCTUICA

or OpenPhone

NCTUICA

or OpenPhone

•Using IN basic call state model (BCSM)• Unified event trigger• Mapping VoIP message to BCSM •Supports:

• H.323, SIP, MGCP, H.248 • Inter domain interworking

Components in our ICA

ICAICAh323h323

mgcpmgcp siplibsiplib

megacomegaco

GK CA

SIPProxy/Registrar

MGC

User User User User

Network

Globaluser

Globaluser

Protocol dispatcherProtocol dispatcher

CalltableCalltable

Call controldispatcher


O T O T O T O T

ICAICAh323h323


megacomegaco

GK CA

SIPProxy/Registrar

MGC

User User User User

h323h323


megacomegaco

GK CA

SIPProxy/Registrar

MGC

h323h323


megacomegaco

GK CA

SIPProxy/Registrar

MGC

User User User User

Network

Globaluser

Globaluser

Protocol dispatcherProtocol dispatcherProtocol dispatcherProtocol dispatcher

CalltableCalltable



CalltableCalltable


Call controldispatcherCall controldispatcher


O T O T O T O TO T O T O T O T

ICA functional blocks

Step 1. Select one hop neighbor nodes closer to the anchor

Step 2. Choose the node with the maximum energy level from the

selected nodes

Energy consumption vs. number of nodes

Latency per packet vs. number of nodes.

A Cluster-based Energy Efficient Routing A Cluster-based Energy Efficient Routing Algorithm in Mobile Wireless Sensor NetworksAlgorithm in Mobile Wireless Sensor Networks

An illustration of dwDVS

Effect of WCET/BCET ratio onenergy consumption

020406080

100120

1 2 3 4 5 6 7 8 9 10

WCET/BCET ratio

CPU

ene

rgy

cons

umpt

ion

(Nor

mal

ized

)

Static laEDF DRA dwDVS Bound

Effect of worst-case utilization onenergy consumption

020406080

100120

10 20 30 40 50 60 70 80 90 100

Worst-case utilization (%)CPU

ene

rgy

cons

umpt

ion

(Nor

mal

ized

)

Static laEDF DRA dwDVS Bound

A Deferred-Workload-based Dynamic Voltage Scaling Algorithm for Hard Real-Time Systems

Power saving mechanism in PSM-V

VoIP over WLANs system architecture

A Power Saving MAC Mechanism for VoIP over IEEE 802.11e WLANs

Polling scheme comparison

Proposed power-efficient polling scheme

SchemeRound-robin polling (RRP) scheme [8]

On-demand polling (ODP) scheme [4]

Power-Efficient Polling (PEP) scheme (Proposed)

Characteristics of polling scheme

Static Dynamic Dynamic

Complexity of implementation Easy Medium Medium

Normalized power consumption Highest Medium Lowest

Aggregate throughput Higher Lower Almost the same as RRP

Average end-to-end delay Lowest Highest Medium

PIFS SIFS SIFS SIFS SIFS PIFS

Beacon QoS CF-Poll QoS

NullData

ACK

TXOP 1

Controlled Access Phase (CAP)

…..

QAP

QSTA

QSTA 2

.... Beacon....

ContentionPeriod (CP)

CAP

....

QSTA 1QSTA 2

QSTA 1

A Power-Efficient MAC Protocol for VoIP Traffic over IEEE 802.11e WLANs

A NEW MODEL FOR OPTIMAL RWA A NEW MODEL FOR OPTIMAL RWA WITH FIXED-LENGTH TUNNEL WITH FIXED-LENGTH TUNNEL

ALLOCATION IN MG-OXC NETWORKSALLOCATION IN MG-OXC NETWORKSMultigranularity Optical Multigranularity Optical Cross-Connect (MG-OXC)Cross-Connect (MG-OXC)

Bundle a group of consecutive wavelength Bundle a group of consecutive wavelength channels together and switch them as a channels together and switch them as a single unit on a specific route (tunnel)single unit on a specific route (tunnel)

Layered Auxiliary GraphLayered Auxiliary Graph

Given a set of static lightpath requests, (a) allocate a set of fixed-length tunnels (b) find routes from source to destination nodes,The objective is to minimize the blocking

probability.

Routing and Wavelength Routing and Wavelength Assignment (RWA) with tunnel Assignment (RWA) with tunnel allocationallocation

Fast Packet Classification Using Multi-Dimensional Encoding

Multi-Dimension Encoding

Solution:1. Divide rules into several multi-

dimensional collision-free rule sets

2. Use these sets to form the new coding vector to replace the bit vector

Minimum-Delay and Energy-Efficient Minimum-Delay and Energy-Efficient Source to Multisink Routing in Wireless Source to Multisink Routing in Wireless

Sensor NetworksSensor Networks

Minimum delay, Large energy cost Energy efficient, Large delay Minimum-delay, Energy-efficient

Problem:• Obtain minimum-delay and energy-efficient transmission paths under Single-Source to Multi- Sinks routing scenario in wireless sensor networks

SmartBone: An Energy-Efficient Smart Backbone Construction in Wireless Sensor Networks

Problem:• Energy consumed by awaken sensor nodes• Radio interference of awaken sensor nodes raises packet retransmission resulting additional energy consumption

Dynamic Density Cutback

Flow-Bottleneck preprocessing

SmartBone algorithm:

Shared Risk Link Group (SRLG) Diverse Routing and Channel Assignment in Survivable Wireless Mesh Networks

SRLG:SRLG:• A SRLG is a group of links share a common channel from a NICA SRLG is a group of links share a common channel from a NIC• The SRLG groups areThe SRLG groups are

{(B, C), (A, C)}, NIC of node C tunes to channel 3{(B, E), (D, E), (C, E)} , NIC of node E tunes to channel 2{(B, D), (D, E)} , NIC of node D tunes to channel 1

• NIC fail result in failure of all links in the same SRLG groupNIC fail result in failure of all links in the same SRLG group

Fairness Improvement

Fairness under greedy behavior

Average throughput

2TSA Operations

Fair Scheduling with QoS Guarantees for Uplink Transmission in WiMAX Networks

Algorithm flow chart

Network life

Fairness

Power consumption

Fair Queuing with Power Saving in Wireless Fair Queuing with Power Saving in Wireless Ad Hoc NetworksAd Hoc Networks

Asymptotic Distribution of The Number of Isolated Nodes in Wireless Ad Hoc Networks

with Unreliable Nodes and Links• Main Results:

• Suppose that and nodes have the same maximum transmission radius r = for some constant ξ.

• Then the total number of isolated nodes is asymptotically Poisson with mean .

21

ln

pnp

n

Network Topology

np lnlimn-

e

p1 = 1 and p2 = 0.9

Major ProjectsMajor Projects

ZyXEL Inc.: “802.11eZyXEL Inc.: “802.11e 無線網路下的傳輸品質與快速換手之研究無線網路下的傳輸品質與快速換手之研究 (QoS and Fast (QoS and Fast Handover in 802.11e WLAN)”, 2005.03-2006.02.Handover in 802.11e WLAN)”, 2005.03-2006.02.

工研院工研院 // 學研計畫學研計畫 : "Communication Protocols for Wireless Access : "Communication Protocols for Wireless Access Networks". (2005.01~2005.12)Networks". (2005.01~2005.12)

後卓越計劃後卓越計劃 (Program for Promoting Academic Excellence of Universities II), (Program for Promoting Academic Excellence of Universities II), NSC: "Advanced Technologies and Applications for Next Generation NSC: "Advanced Technologies and Applications for Next Generation Information Networks" Information Networks" 下一世代資訊通訊網路尖端技術與應用下一世代資訊通訊網路尖端技術與應用(2004.04~2008.03).(2004.04~2008.03).– 分項計畫三分項計畫三 : B3G All-IP Wireless Network Technologies, : B3G All-IP Wireless Network Technologies, 後三代全後三代全 IPIP 無線網路技術無線網路技術– 分項計畫四分項計畫四 : Wireless Ad Hoc and Sensor Networks Technologies, : Wireless Ad Hoc and Sensor Networks Technologies, 無線隨意及感測無線隨意及感測

網路技術網路技術

國科會國科會 : “: “ 藍芽個人無線區域網路上通訊議題之設計實作與分藍芽個人無線區域網路上通訊議題之設計實作與分析”析” (2003.08~2006.07)(2003.08~2006.07)

多天線多通道多模多速率無線網狀網路之設計與實作多天線多通道多模多速率無線網狀網路之設計與實作 -- 總計畫總計畫 (1/3), NSC, 2005.08(1/3), NSC, 2005.08至至 2006.072006.07


多天線多通道多模多速率無線網狀網路之設計與實作多天線多通道多模多速率無線網狀網路之設計與實作 -- 子計畫子計畫二二 :M4:M4 無線網狀網路之存取控制協定及繞徑設計無線網狀網路之存取控制協定及繞徑設計 (1/3), NSC, (1/3), NSC, 2005.082005.08 至至 2006.072006.07

後卓越計劃後卓越計劃 (93R045)(93R045) 下ㄧ世代資訊通訊網路尖端技術與應用下ㄧ世代資訊通訊網路尖端技術與應用(( 二二 ) -) - 子計畫三子計畫三 :: 後三代全後三代全 IPIP 無線網路技術無線網路技術 , Ministry of , Ministry of Education, 2004.04Education, 2004.04 至至 2008.032008.03

M4M4 無線網狀網路具品質知覺之無縫交遞無線網狀網路具品質知覺之無縫交遞 (1/3), NSC, (1/3), NSC, 2005.08-2006.072005.08-2006.07

含行動隨意網的含行動隨意網的 MPLSMPLS 無線基礎網路無線基礎網路 , NSC, 2003.08 -, NSC, 2003.08 -2006.072006.07

智慧型手持式裝置雙模網路支援能力之研究與網路應用服務智慧型手持式裝置雙模網路支援能力之研究與網路應用服務 , , Institute for Information Industry, 2004.01-2004.12Institute for Information Industry, 2004.01-2004.12


多階層行動隨意網路之設計及實作多階層行動隨意網路之設計及實作 -- 總計劃總計劃 , NSC, , NSC, 2003.08 -2005.07 2003.08 -2005.07

多階層行動隨意網路之設計及實作多階層行動隨意網路之設計及實作 -- 子計劃一子計劃一 :: 多階層行多階層行動隨意網路之虛擬家網環境動隨意網路之虛擬家網環境 , NSC, 2003.08 - 2005.07, NSC, 2003.08 - 2005.07

無線感測網路之動態定位技術無線感測網路之動態定位技術 , NSC, 2004~2007, NSC, 2004~2007

Advanced System Design of Power Aware Mobile Advanced System Design of Power Aware Mobile Devices, NSC, 2003~2006Devices, NSC, 2003~2006

Network flow control based Generalized Network flow control based Generalized Multiprotocol Label Switching 2 (GMPLS), NSC, Multiprotocol Label Switching 2 (GMPLS), NSC, 2003~20052003~2005


A Wi-Max Gateway implementation A Wi-Max Gateway implementation Using IXP 425, Intel, Taiwan, 2004~2006Using IXP 425, Intel, Taiwan, 2004~2006

Resource Management and Performance Resource Management and Performance Modeling for WCDMA Mobiles - Modeling for WCDMA Mobiles - subproject 3: Performance Modeling of subproject 3: Performance Modeling of Mobile Processor using SystemC, Mobile Processor using SystemC, MediaTek Inc., Taiwan, 2004~2005MediaTek Inc., Taiwan, 2004~2005

Prof. Rong-Hong Jan Prof. Rong-Hong Jan (( 簡榮宏教授簡榮宏教授 ))

– Location-aware WWWLocation-aware WWW

– An adaptive Web System for An adaptive Web System for

Heterogeneous for IPv6 Heterogeneous for IPv6

NetworksNetworks

– Home Network Gateway wit Home Network Gateway wit

WAP and SMSWAP and SMS

– Thin AP with Light weight Thin AP with Light weight

Access PointAccess Point Areas of research interestsAreas of research interests

– Mobile computingMobile computing– Wireless internetWireless internet– Computer networksComputer networks– Computer algorithmsComputer algorithms– Network reliabilityNetwork reliability

PublicationsPublications– International journal: 32International journal: 32– International conference: 28International conference: 28

B.S., NTHU-IE, 1979B.S., NTHU-IE, 1979

M.S.,NTHU-IE,1983M.S.,NTHU-IE,1983

Ph.D., NTHU-CS, 1987Ph.D., NTHU-CS, 1987

Professor, NCTU-CS, 1987~Professor, NCTU-CS, 1987~

Chairman NCTU-CS, 1996 Chairman NCTU-CS, 1996

Visiting associate professor, Visiting associate professor,

UMD-CS 1992UMD-CS 1992

Research projects in Research projects in

last three yearslast three years– M4 wireless mesh networks: M4 wireless mesh networks:

design and implementationdesign and implementation

– GPRS/WAN Two-tier Mobility GPRS/WAN Two-tier Mobility

SystemSystem

Prof. Yu-Chee Tseng Prof. Yu-Chee Tseng (( 曾煜棋教授曾煜棋教授 ))

Areas of research interestsAreas of research interests– Wireless Network Wireless Network – Communication ProtocolCommunication Protocol– Mobile ComputingMobile Computing– Network SecurityNetwork Security– Wireless Sensor NetworkWireless Sensor Network– Wireless Mesh NetworkWireless Mesh Network– Wireless VoIPWireless VoIP– Distributed SystemDistributed System– Parallel Processing PublicationsParallel Processing Publications

International journal: 91International journal: 91 International conference: 99International conference: 99 Book Chapters: 12Book Chapters: 12 Patents: 2 granted, 5 pending Patents: 2 granted, 5 pending

B.S., NTU-CSIE, 1985B.S., NTU-CSIE, 1985 M.S., NTHU-CSIE, 1987M.S., NTHU-CSIE, 1987 Ph.D., Ohio State University-CIS, Ph.D., Ohio State University-CIS,

19941994 Professor, NCTU-CS, 2000~Professor, NCTU-CS, 2000~ Chief Executive Officer, ITRI-NCTU Chief Executive Officer, ITRI-NCTU

Joint Research Center, 2005~Joint Research Center, 2005~ Chairman, NCTU-CS, 2005~Chairman, NCTU-CS, 2005~

““Distinguished Alumnus Award”, Distinguished Alumnus Award”,

2005, The Ohio State University2005, The Ohio State University

Distinguished Research Award Distinguished Research Award

(two times)(two times)

Distinguished EE Professor Award, Distinguished EE Professor Award,

The Chinese EE Institute, 2005The Chinese EE Institute, 2005

Prof. Chien-Chao Tseng Prof. Chien-Chao Tseng (( 曾建超教授曾建超教授 ))

Research Interests:Wireless Internet Infrastructure and Protcols, Wireless Internet Applications

Topics:Integration of Wirelsss Networks:

- 3G, GPRS, Wireless LAN, Bluetooth, PAN- Mobile IP, NAT, VPN, MPLS- Mobile Router and Proxy, Ad Hoc Networks- Fast Handover (802.11i)

Seamless Handover for Wireless Internet - Drivers, Network Layer, Transport Layer, Application Layer- SIP Mobility, 802.11x, Authentications (802.1x, 802.11i)

Wireless Internet Applications: -Mobile e-learning Platform, ITS Platform, Location-aware Applications

-August 1989 - August 1996Associate Professor, Department of Computer Science and Information Engineering, National Chiao Tung University.

-August 1996 – NowProfessor, Department of Computer Science and Information Engineering, National Chiao Tung University.

Prof. Kuochen Wang Prof. Kuochen Wang (( 王國禎王國禎教授教授 ))

Areas of research interestsAreas of research interests– Wireless networks and mobile Wireless networks and mobile

ComputingComputing Sensor networks, ad-hoc networks, Sensor networks, ad-hoc networks,

and mesh networksand mesh networks– Power-aware computing and Power-aware computing and

communicationscommunications– Network reliability and securityNetwork reliability and security

PublicationsPublications– Journal papers: 22Journal papers: 22– Conference papers: 47Conference papers: 47– Book Chapters: 1Book Chapters: 1

B.S., NCTU-Control Eng., 1978B.S., NCTU-Control Eng., 1978

M.S., Univ. of Arizona-ECE, 1986M.S., Univ. of Arizona-ECE, 1986

Ph.D., Univ. of Arizona-ECE, 1991Ph.D., Univ. of Arizona-ECE, 1991

Senior Engineers, Directorate Senior Engineers, Directorate

General of Telecommunications, General of Telecommunications,

1980-19841980-1984

Professor, NCTU-CS, 1999 ~Professor, NCTU-CS, 1999 ~

Research projectsResearch projects– NCTU-MediaTek Project: NCTU-MediaTek Project: Low Low

power, handover and QoS power, handover and QoS

schemes in heterogeneous schemes in heterogeneous

wireless networkswireless networks

– NSC Project: Dynamic localization NSC Project: Dynamic localization

in wireless sensor networksin wireless sensor networks

Prof. Shie-Yuan Wang Prof. Shie-Yuan Wang (( 王協源教授王協源教授 ))

Research InterestsResearch Interests– Wireless NetworkWireless Network

Mobile ad hoc networkMobile ad hoc network Wireless LAN and mesh networksWireless LAN and mesh networks WiMax and WLAN integrated WiMax and WLAN integrated

networksnetworks

– Network Simulation and EmulationNetwork Simulation and Emulation– Internet TechnologyInternet Technology– Network System Design and Network System Design and

ImplementationImplementation PublicationsPublications

Journal Papers : 13Journal Papers : 13 Conference Papers : 15Conference Papers : 15 Book Chapters : 1Book Chapters : 1 Patents : 1Patents : 1

– Ph.D. (Harvard University), 1999Ph.D. (Harvard University), 1999

– Associate Professor (NCTU), 2003– Associate Professor (NCTU), 2003– presentpresent

– Assistant Professor (NCTU), 2000-Assistant Professor (NCTU), 2000-2003 2003

– Founder and director of NCTU Founder and director of NCTU “Network and System Laboratory,” “Network and System Laboratory,” 2000 –2000 –

– Vice director of NCTU EE college Vice director of NCTU EE college and CS college’s Honors and CS college’s Honors Undergraduate Program, 2005 –Undergraduate Program, 2005 –

– Author of NCTUns Network Author of NCTUns Network Simulator and Emulator (As of Simulator and Emulator (As of 11/24/2005, more than 4,500 11/24/2005, more than 4,500 people from 95 countries have people from 95 countries have registered and download this tool) registered and download this tool)

Prof. Chien Chen Prof. Chien Chen (( 陳健教授陳健教授 ))

Assistant Professor (NCTU), 2002~Assistant Professor (NCTU), 2002~ Director & Chief Architect Director & Chief Architect

(Terapower) 2001-2002(Terapower) 2001-2002 Chief Engineer (Coree Networks) Chief Engineer (Coree Networks)

2000-20012000-2001 Member of Technical Staff (Lucent, Member of Technical Staff (Lucent,

Bell Labs) 1996-2000Bell Labs) 1996-2000 Lecturer (Tunghai University) 1986-Lecturer (Tunghai University) 1986-

1988 1988 B.S., NCTU-CE, 1982B.S., NCTU-CE, 1982 M.S.,NCTU-CE,1984M.S.,NCTU-CE,1984 Ph.D., Stevens-EE, 1996Ph.D., Stevens-EE, 1996 Research InterestsResearch Interests

– Ad Hoc/Sensor/Wireless Mesh Ad Hoc/Sensor/Wireless Mesh Networks (NSC)Networks (NSC)

Link Stability Model and Adaptive Link Stability Model and Adaptive Routing Strategy in MANETsRouting Strategy in MANETs

Energy-efficient Flooding in MANETsEnergy-efficient Flooding in MANETs Topology Control and Data Topology Control and Data

Aggregation in Wireless Sensor Aggregation in Wireless Sensor Networks Networks

Wireless Mesh Routing and Channel Wireless Mesh Routing and Channel AssignmentAssignment

Survivable Wireless Mesh NetworksSurvivable Wireless Mesh Networks– WiMAX QoS Management Architecture WiMAX QoS Management Architecture

(Intel & III)(Intel & III) Connection Management – Connection Management –

Measurement based CACMeasurement based CAC QoS Guarantee – Upstream QoS Guarantee – Upstream

schedulerscheduler Service Provisioning – Packet Service Provisioning – Packet

classification classification – Broadband & Optical NetworksBroadband & Optical Networks

Network Processor (Intel)Network Processor (Intel) NAPT, and IP Classifier (III)NAPT, and IP Classifier (III) Traffic Engineering in GMPLS Traffic Engineering in GMPLS

Networks (NSC)Networks (NSC) PublicationsPublications

– International journal: 2International journal: 2– International conference: 13International conference: 13

Prof. Hsi-Lu Chao Prof. Hsi-Lu Chao (( 趙禧綠教授趙禧綠教授 ))

Ph.D., NTU-EE, 2004Ph.D., NTU-EE, 2004 Assistant Professor, NCTU-Assistant Professor, NCTU-

CS, 2004/8~CS, 2004/8~ A member of the IEEE and A member of the IEEE and

ACMACM Listed in the Marquis Who's Listed in the Marquis Who's

Who in the World, 2006 Who in the World, 2006 Research interestsResearch interests

– Protocol design for wireless Protocol design for wireless

networksnetworks

– Broadband InternetBroadband Internet

– Quality of Service issuesQuality of Service issues

On-going research On-going research includes:includes:– MAC layer issues in WiFi, MAC layer issues in WiFi,

UWB and WiMaxUWB and WiMax– Power saving Power saving

technologies in MANETs, technologies in MANETs, WSNs, WMNsWSNs, WMNs

– QoS issues of multimedia QoS issues of multimedia deliverydelivery

– Mobility issues in Mobility issues in heterogeneous networksheterogeneous networks

PublicationsPublications– International journal: 3International journal: 3– Local journal: 1Local journal: 1– International conference: International conference:

33

Prof. Chih-Wei Yi Prof. Chih-Wei Yi (( 易志偉教授易志偉教授 ))

He is an Assistant Professor with the Department of He is an Assistant Professor with the Department of Computer Science, National Chiao Tung UniversityComputer Science, National Chiao Tung University

He received his Ph.D. in Computer Science from the He received his Ph.D. in Computer Science from the Illinois Institute of Technology, May 2005.Illinois Institute of Technology, May 2005.

His research interesting focuses on wireless ad hoc His research interesting focuses on wireless ad hoc networks, especially about the power saving issue.networks, especially about the power saving issue.

He has 9 articles published or accepted by famous He has 9 articles published or accepted by famous journals, including IEEE TCOM, IEEE/ACM ToN, IEEE journals, including IEEE TCOM, IEEE/ACM ToN, IEEE TPDS, IEEE IT, ACM MONET, WCMC, etc., and 10 TPDS, IEEE IT, ACM MONET, WCMC, etc., and 10 papers published in international conferences, papers published in international conferences, including INFOCOM, WCNC, ICC, MobiHoc, etc..including INFOCOM, WCNC, ICC, MobiHoc, etc..

Contact information:Contact information:– Email: [email protected]: [email protected]– Tel: +886-3-5712121 ext 56686Tel: +886-3-5712121 ext 56686

wireless pan, lan and man 研究群 研究能量與研發成果. –sensor networks 曾煜棋、陳...

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wireless pan, lan and man 研究群研究能量與研發成果. –sensor networks 曾煜棋、陳...