new generation communication networks

1INNOSOC'2016 ZAGREB

New Generation

Communication Networks

Georgi Iliev

Technical University of Sofia

Department of Communication Networks

2

CONTENTS

1. Access Networks

2. Local Area Networks (LAN)

3. Mobile Networks

3

HDSL

HDSL types

•First generation HDSL – ITU

Recommendation

G.991.1

•Second generation HDSL2 – ITU

Recommendation

G.991.2

4

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

5

HDSL

HDSL dual duplex transmission system

6

HDSL

HDSL transmission

•Echo canceled hybrid

•Dual duplex

•2B1Q

7

HDSL

Second generation HDSL

•One pair of wires instead of two

•Frequency offset for up and

downstream directions –

to combat crosstalk

•Modulation format - PAM

8

ADSL

ADSL services

•Downstream - up to 9 Mbps

•Upstream - up to 1 Mbps

•Plain old telephone service POTS

9

ADSL

ADSL reference model

10

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

11

ADSLADSL transmission FDM

12

ADSLADSL transmission ECH

13

VDSL

Types of VDSL

14

VDSL

VDSL configurations

15

VDSL

VDSL reference model

16

VDSL

VDSL transmission

•SDMT (TDD-DMT)

•Zipper (FDD-DMT)

•CAP/QAM

•MQAM (Multi-QAM)

17

VDSL

DMT

18

PON

Types of PON

•APON ATM PON

•BPON Broadband PON ITU

•EPON Ethernet PON IEEE

•GPON Gigabit PON ITU

19

PONFTTH structures

20

PONPON topologies

Tree – 1:N Ring – 2x2

Bus – 1x2 Tree with redundancy – 2:N

21

PON

EPON downstream

22

PON

EPON upstream

23

LAN

Applications

•Personal computer networks

•Storage area networks (SAN)

•High-speed office networks

•Backbone networks

24

LAN topologies

25

LAN protocol architecture

26

LAN protocol architecture

27

LAN

LLC services

•Unacknowledged connectionless

service

•Connection-mode service

•Acknowledged connectionless

service

28

LAN

Medium Access Control

•centralized

•distributed

•synchronous (static)

•asynchronous (dynamic)

•round robin

•reservation

•contention

29

Ethernet

30

Gigabit Ethernet

31

Gigabit Ethernet

32

Wireless LAN

Applications

•LAN extension

•cross-building interconnect

•“nomadic” access

•“ad hoc” networks

33

Wireless LAN

34

Wireless LAN

35

Wireless LAN

Wireless LAN

ac

36

WiMAX

37

WiMAX

38

WiMAX

39

WiMAX

40

WiMAX

41

LTE

42

LTE

43

LTE

44

4G

45

4G

46

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

47

Channel bandwidth enlargement

5 x 20 MHz = 100 MHz

Max data rate 1 Gbps downstream

Max data rate 500 Mbps upstream

4G

48

4G

49

4G

50

4G

51

4G

52

5G !?

53

5G !?

54

55

Thank you for your attention