Wireless atm development scenario
This presentation is the property of its rightful owner.
Sponsored Links
1 / 26

Wireless ATM Development Scenario PowerPoint PPT Presentation


  • 61 Views
  • Uploaded on
  • Presentation posted in: General

Wireless ATM Development Scenario. 성 단 근 ( 成 檀根 ) 한국과학기술원 (KAIST). Contents. Wireless ATM ? Requirements Radio ATM : PHY, MAC, DLC Mobile ATM : Handoff, LM Testbed Systems (WATM Projects) Development Scenario Conclusions. Wireless ATM ?. Mobility. Wireless. Fixed / Wired.

Download Presentation

Wireless ATM Development Scenario

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Wireless atm development scenario

Wireless ATM Development Scenario

성 단 근 (成 檀根)

한국과학기술원 (KAIST)

Communication Networks Research Lab.


Contents

Contents

  • Wireless ATM ?

  • Requirements

    • Radio ATM : PHY, MAC, DLC

    • Mobile ATM : Handoff, LM

  • Testbed Systems (WATM Projects)

  • Development Scenario

  • Conclusions

Communication Networks Research Lab.


Wireless atm

Wireless ATM ?

Mobility

Wireless

Fixed / Wired

Cellular-based

Approach

Cordless-based

Approach

PSTN

First Gen.

CT-1

Analog

Analog

Cellular

Fast

PSDN

IMT-2000

Public

CT-2

Cellular

Slow

Second Gen.

Satellite

mobile

ISDN/

B-ISDN

Digital

cellular

Wireless

CT3

PCS

ATM

Movable

or

Still

PCN

Third Gen.

Private

(indoor)

Cordless

Telephone

Wireless LAN (IEEE 802.11)

Fixed

B - ISDN

UMTS / IMT-2000

W-ATM

1

10

0.1

100

Mbps

Communication Networks Research Lab.


Wireless atm as a general concept

Wireless ATM as a General Concept

Communication Networks Research Lab.


Standardization atm forum

Mobile ATM

B1. Handoff control

B2. Location management for mobile terminals

B3. Routing for mobile connections

B4. Traffic/QOS control for mobile connections

B5. Wireless network management

Radio ATM

A1. Radio physical layer

A2. MAC for wireless channel (with QOS)

A3. Data link control for wireless channel

A4. Radio resource management

Standardization (ATM Forum)

  • Working Group (June `96)

  • Recommendations (Dec. `98)

User Plane

Control Plane

Mobility Control

ATM Adaptation Layer

Wireless

ATM Layer

Control

Data Link Control

Medium Access Control

Radio Physical Layer

Radio Access “R” Specification

Mobility “M” Specification

Communication Networks Research Lab.


Multimedia service classes and qos

Multimedia Service Classes and QoS

  • Service Classes

    • CBR (Constant Bit Rate)

    • VBR (Variable Bit Rate) : Real-time and NonReal-time

    • ABR (Available Bit Rate)

    • UBR (Unspecified Bit Rate)

Communication Networks Research Lab.


Problems

Problems

  • Medium (Radio ATM)

    • ATM assumes reliable transmission media

      • e.g.) optical fiber => error correction

    • Efficient transmission of short cells

    • QoS guarantee over unreliable radio link

  • Mobility (Mobile ATM)

    • Signaling modifications to support mobility

    • Addressing (ATM, MAC, VCI/VPI)

    • Security

Communication Networks Research Lab.


Physical interface

Physical Interface

  • Frequency Band

    • 2.4GHz band : 6-8 Mbps

    • 5 GHz band : 25Mbps (50 kcells/sec to the ATM Layer)

    • 17 GHz band : 155Mbps

    • 60 GHz band : 155Mbps or 622Mbps...

  • Unreliable Link (Error Source)

    • Multi-path fading (Dominant source)

    • High frequency and traveling speed => fading rate

  • Cell Size and Channel Utilization

  • Packet Size

    • > 1cell / PDU for effective utilization

Communication Networks Research Lab.


Wireless atm development scenario

MAC Protocols for Radio Access Interface

  • Integrate Services and Guarantee QoS

  • Distributed (WATM LAN) or Central

  • TDMA/Asymmetrical TDD with dynamic slot assignment (ATM Forum)

Access Mode

Circuit Mode

Packet Mode

CDMA

Paradigm

TDMA

Paradigm

FDMA

TDMA

CDMA

  • DSA/DSA++

  • Dynamic TDMA

  • DQRUMA

  • Slotted CDMA

    • Multicode

?

?

?

Communication Networks Research Lab.


Error control dlc

Error Control (DLC)

  • Channel Error Recovery

    • Interleaving

    • Forward error control (FEC)

    • Dual - level FEC

  • Link Error Recovery

    • Auto Repeat reQuest (ARQ) retransmission

      • Go-back N

      • Selective repeat

    • FEC

Communication Networks Research Lab.


Handoff issues

Handoff Issues

  • Hard vs. Soft Handoff

  • Path Extension vs. Path Rerouting

  • Static COS vs. Dynamic COS Selection

  • Control Plane vs. User Plane Signaling

  • QoS Guarantee at Handoff

    • Different user load at base stations

    • Reserving capacity => waste of system resource

Communication Networks Research Lab.


Watm project magic wand

ATM

Network

WATM Project - Magic WAND

  • Private, Indoor, Business Customer Premises Network

  • Desktop, Nomadic User, Hand Portable Applications

  • ACTS Projects

  • 50Mbps @ 17GHz

  • TDMA/TDD

  • 50m Cell, 15 km/h

  • MASCARA

  • Wireless DLC

  • Intra-Switch Lossless Handover

AP : Access Point

Communication Networks Research Lab.


Watm project median

WATM Project - MEDIAN

  • High Speed Wireless Customer Premises LAN

  • Professional & Residential Multimedia Applications

  • ACTS Projects

  • 34 or 155Mbps @ 60 GHz

  • OFDM (512 Carriers)

  • TDMA/TDD

Communication Networks Research Lab.


Wireless atm development scenario

WATM Project - BAHAMA

  • Broadband Adaptive Homing ATMArchitecture

  • Ad-Hoc Wireless ATM LAN

  • PBS : ATM Switching Functionality + Wireless

  • Access Interfaces

  • AT&T Bell Lab.

  • 2Mbps @ 900MHz

  • 10Mbps @ ???

  • TDMA

  • DQRUMA

  • Homing Algorithm

  • Broadcast Scheme

Communication Networks Research Lab.


Watm project watmnet

WATM Project - WATMnet

  • A Prototype Microcellular Wireless ATM Network

  • Mobility Enhanced ATM Signaling (Q.2931+)

  • NEC USA, C&C Research Lab.

  • 8Mbps @ 2.4 GHz

  • TDMA/TDD

  • p/4 QPSK

  • Dynamic TDMA

  • AAL 3/4 & 5

  • Handover Switch Scheme

Communication Networks Research Lab.


Watm project swan

WATM Project - SWAN

  • Indoor Environments

  • AT&T Bell Lab.

  • 10-20m Cell

  • 625 kbps @ 2.4GHz

  • TDMA/TDD

  • FHSS modem

  • Token Passing MAC

Communication Networks Research Lab.


Watm project mbs

WATM Project - MBS

  • Public and Private System, Indoor and Outdoor

  • All Multimedia Applications and B-ISDN Compatible

  • ACTS Projects

  • 34Mbps @ 60GHz

  • TDMA/FDMA/FDD

  • 4 and 16 OQAM

  • SR-ARQ

  • Network Handover with Server

Communication Networks Research Lab.


Wireless atm development scenario

WATM Project - SAMBA

  • Advance the MBS Evolution and Promote Its Standardization

  • Medical and Broadcast Applications

  • ACTS Projects

  • 34Mbps @ 40GHz

Communication Networks Research Lab.


Wireless atm development scenario

ATM-based

multimedia network

Media Server

ATM`-SW

Hand-held

portable

multimedia

terminal

Micro-cell/Pico-cell at public

spaces like Hotel, Airport,

Rail-station, Restaurant etc.

WATM Project - AWA

  • Wireless ATM LAN and Public Networks

  • Dual Mode Access

  • ATM Services

  • NTT

  • [email protected]

  • TDMA/TDD

  • QPSK or p/4-QPSK

  • SR-ARQ

Communication Networks Research Lab.


Watm project summary

WATM Project - Summary

Communication Networks Research Lab.


Technology tree for wirelss atm

LM

Frequency Bands

Data Rates

Environments

Channel Coding

Cell Size

Modulation

Multiple Access

Technology Tree for Wirelss ATM

Wireless ATM

Radio ATM

Mobile ATM

Handoff

MAC

PHY

DLC

Hard vs. Soft

Service Integration

Buffering

Mobile Tracking

Extension vs. Rerouting

QoS Guarantee

Cell Integrity

Mobile PNNI vs. LR

Static vs. Dynamic COS

Distributed vs. Central

Transfer Delay

Control vs. User Plane

Utilization

QoS Guarantee

ARQ vs. FEC

Forward vs. Backward

Hybrid ARQ/FEC

Communication Networks Research Lab.


Watm scenario

WATM Scenario

Communication Networks Research Lab.


Watm scenario stage 1

WATM Scenario - Stage 1

  • Design Objective

    • Wireless Channel Design

  • WATM Terminal + Base Station (BS)

    • Carrier frequency : 2.4 GHz, 5.2GHz, 17GHz, 60GHz, etc.

    • Radio Propagation Characteristic : Indoor, Outdoor

    • Multiple Access Scheme : TDMA, CDMA, etc.

    • Modulation : QPSK, OQAM, OFDM, etc.

    • Channel Coding : Interleaving, FEC

    • Antennas : Omnidirectional, Directional, Array

    • Cell Size and Link Utilization

Communication Networks Research Lab.


Watm scenario stage 2

WATM Scenario - Stage 2

  • Design Objectives

    • Local mobility

    • Service Integration

  • WATM Terminal + BS + Switch

    • Dynamic Scheduling : DSA, DQRUMA, etc.

    • Services : CBR + VBR + ABR + UBR

    • Error Control : ARQ, FEC, ARQ/FEC

    • Hard handoff vs. Soft handoff

    • Forward handoff vs. Backward handoff

Communication Networks Research Lab.


Watm scenario stage 3

WATM Scenario - Stage 3

  • Design Objectives

    • Network mobility

    • Interworking function

  • WATM Terminal + BS + Switch + ATM Networks

    • Handoff Signalling : Control Plane vs. User Plane

    • Path Routing : Path rerouting vs. Path Extension

    • QoS Guarantee During Handoff Procedures

    • Location Management

    • Interworking with Cellular, PCS, ATM LAN, etc.

Communication Networks Research Lab.


Conclusions

Conclusions

  • Extension of ATM Services to Wireless Terminals

  • Technology Tree for WATM (Radio & Mobile ATM)

  • Various WATM Projects in Progress

    • Magic WAND, MEDIAN, BAHAMA, WATMnet, AWA, SWAN, MBS, SAMBA

  • WATM Scenario

    • Stage 1 : Wireless Link Design

    • Stage 2 : Service Integration and Local Mobility

    • Stage 3 : Network Mobility and Interworking

Communication Networks Research Lab.


  • Login