1INNOSOC'2016 ZAGREB

New Generation

Communication Networks

Georgi Iliev

Technical University of Sofia

Department of Communication Networks

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CONTENTS

1. Access Networks

2. Local Area Networks (LAN)

3. Mobile Networks

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HDSL

HDSL types

•First generation HDSL – ITU

Recommendation

G.991.1

•Second generation HDSL2 – ITU

Recommendation

G.991.2

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HDSL

HDSL applications

•Т1 or Е1 in local loop

•1.544 or 2.048 Mbps over telephone lines

(copper UTP)

up to 3.7 km

•no repeater

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HDSL

HDSL dual duplex transmission system

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HDSL

HDSL transmission

•Echo canceled hybrid

•Dual duplex

•2B1Q

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HDSL

Second generation HDSL

•One pair of wires instead of two

•Frequency offset for up and

downstream directions –

to combat crosstalk

•Modulation format - PAM

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ADSL

ADSL services

•Downstream - up to 9 Mbps

•Upstream - up to 1 Mbps

•Plain old telephone service POTS

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ADSL

ADSL reference model

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ADSL

Types of ADSL

•Full rate - ITU Recommendation G.922.1

•G.lite - ITU Recommendation G.922.2

•Modulation format - DMT

•Number of tones - full 256, G.lite 128

•Number of bits per tone - full 15, G.lite 8

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ADSLADSL transmission FDM

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ADSLADSL transmission ECH

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VDSL

Types of VDSL

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VDSL

VDSL configurations

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VDSL

VDSL reference model

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VDSL

VDSL transmission

•SDMT (TDD-DMT)

•Zipper (FDD-DMT)

•CAP/QAM

•MQAM (Multi-QAM)

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VDSL

DMT

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PON

Types of PON

•APON ATM PON

•BPON Broadband PON ITU

•EPON Ethernet PON IEEE

•GPON Gigabit PON ITU

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PONFTTH structures

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PONPON topologies

Tree – 1:N Ring – 2x2

Bus – 1x2 Tree with redundancy – 2:N

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PON

EPON downstream

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PON

EPON upstream

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LAN

Applications

•Personal computer networks

•Storage area networks (SAN)

•High-speed office networks

•Backbone networks

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LAN topologies

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LAN protocol architecture

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LAN protocol architecture

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LAN

LLC services

•Unacknowledged connectionless

service

•Connection-mode service

•Acknowledged connectionless

service

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LAN

Medium Access Control

•centralized

•distributed

•synchronous (static)

•asynchronous (dynamic)

•round robin

•reservation

•contention

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Ethernet

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Gigabit Ethernet

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Gigabit Ethernet

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Wireless LAN

Applications

•LAN extension

•cross-building interconnect

•“nomadic” access

•“ad hoc” networks

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Wireless LAN

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Wireless LAN

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Wireless LAN

Wireless LAN

ac

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WiMAX

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WiMAX

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WiMAX

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WiMAX

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WiMAX

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LTE

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LTE

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LTE

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4G

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4G

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Basic methods for 4G

•Channel bandwidth enlargement

•Coordinated multipoint transmission (CoMP)

•Relay stations

•Advanced MIMO techniques

•Heterogeneous networks

Candidates

•LTE Advanced – 3GPP

•802.16m – IEEE, WiMAX Forum

4G

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Channel bandwidth enlargement

5 x 20 MHz = 100 MHz

Max data rate 1 Gbps downstream

Max data rate 500 Mbps upstream

4G

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4G

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4G

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4G

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4G

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5G !?

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5G !?

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Thank you for your attention