Ppt - Advanced OPNET Tutorial LTE Access

Kotelawala Defence University EE&T

Dr. Thushara Weerawardane

Senior Lecturer

Kotelawala Defence University

Lab3 – OPNET Advanced Tutorial LTE Simulation Model

Kotelawala Defence University EE&T 2 Dr. Thushara Weerawardane

LTE reference model

Remote Server

(VOIP, HTTP,

FTP, Video)

aGW

R1

R3

R2

eNB4eNB3eNB2eNB1

Last m

ile

link

UEUE UE UE

LTE simulation model is based on

this LTE reference architecture


Reference LTE protocol architecture

PDCP

RLC

MAC

L1

End User

Application

TCP/UDP

IP

Uu

PDCP

RLC

MAC

L1

GTP

UDP

IP (Diffserv)

L1

L2

IPSec

L2

L1

GTP

UDP

IP (Diffserv)

L1

L2

IPSec

L2

L1

Application

servers

Application

(server)

TCP/UDP

IP

S1/X2

aGWeNodeB


Overview of the OPNET LTE System simulator

Cell 1

aGW eNB2

eNB3

eNB4

Cell 2

Cell 3

R2

R3

R1

eNB1 Application configuration

for users

Mobility model Central

information

center

QoS configuration

for users

PDCP

RLC

MAC

PHY

Application

TCP/UDP

IPL2

L1

GTP

UDP

IP (Diffserv)

L1

L2

IPSec

PDCP

RLC

MAC

PHY

GTP

UDP

IP (Diffserv)

L1

L2

IPSec


LTE simulator overview - 2

LTE backhaul

eNodeBs

Mobile GW:

Intermediate routers

End-to-end TCP

End-to-end TCP


E-UTRAN node models

UE node model

eNodeB node model

aGW node model


LTE MOBILITY MODEL AND CHANNEL MODEL CONFIGURATION OVERVIEW


Mobility configuration node

Two main mobility models - RWP mobility model and

- RD mobility model


Mobility model and channel model

Two main parts

Mobility model and

Channel model

Two main generic mobility models

RWP mobility model and

RD mobility model

Channel model Pathloss: 128.1 + 37.6*log10(distance)

Correlated Slow Fading: Lognormal-distributed

Fast Fading: Jakes-Like method, 2 Extended ITU Channel Models

- Extended Pedestrian A

- Extended Vehicular A


APPLICATION AND TRAFFIC MODEL CONFIGURATION IN OPNET


Example of traffic models VoIP configuration

Codec: AMR 12.2 kbps (GSM EFR)

No silence suppression

50 frames/sec, 1 frame/IP packet

codec delay: 40 ms, Transport: RTP/UDP

Traffic idleness: 0.5 sec, Call duration: const. 90 sec

Call inter-arrival time: const. 90 sec and

neg. exp. with 50 sec mean value

Web traffic model Number of pages per session is 5

Average page size is 100 Kbyte,

number of Object per page is 1 (frame = 1 kbyte and Object size = 100 Kbyte)

Reading time is const (12 sec)

Each page uses separate TCP connection

FTP traffic model File size is const (5 Mbyte)

Interarrival time is uniform(30-60) sec


Configuring application models: workflow

Application Deployment

Configure applications

Define profiles

Deploy

applications/profiles


Applications: built-in standard applications

Standard

application

models

Custom Application

Name Description

Database

E-mail

FTP

HTTP

Print

Remote Login

Voice

Video Conferencing

Generic/customizable application

Data entry/query application

E-mail application

File transfer protocol application

Web-browsing application

Print job

Telnet application application

Client-to-client voice application

Client-to-client video application


Application configuration VoIP


Application configuration


FTP traffic model configuration

Common settings

Specific FTP

settings

Inter-Request Time

FTP (Application)

PUT PUT GET

FTP

– Using file size distribution

– Using Inter-request time distribution

Example FTP configuration - File size is 5Mbyte

- The time duration between the start of a file download and the start of the

next download is uniformly distributed between 30 and 60 sec


HTTP traffic model configuration

Example1:


HTTP traffic model configuration cont.

Example 2:

• Number of pages per session = 5 pages

• Average page size = 100,000 bytes

• # of objects in a page = 1 first Object (frame) = 1 Kbyte

and 2nd object = 100 Kbyte

• Reading time (default) = 12 sec


VoIP configuration in OPNET


VoIP: E-model (ITU G.107)

Ro = 15 −1.5(SLR + No), Is = Iolr + Ist + Iq, Id = Idte + Idle + Idd


E-model (ITU G.107)

A model to assess combined effects of variations in several parameters that affect conversation quality of handset telephony

It produces a result called „Rating Factor“ R R = Ro – Is – Id – Ie + A

- Ro: basic SNR,

- Is: voice signal impairments,

- Id: impairments caused by delay,

- Ie: equipment related impairments,

- A: Advantage factor

R can be mapped to MOS value


PROFILE CONFIGURATION IN OPNET


What is a profile? Profile is a collection of applications

Describes activity patterns of:

An individual user A group of users

CEO CFO

Engineer

Engineer

Engineer

Help desk

Marketing department

Profiles

FTP Email

Engineer

Video HTTP Email

Marketing Department

Email Database

Sales Engineer

Apps


Profile Attributes

Profile Name

Applications

Operation Mode

Start Time

Duration

Repeatability


Profile name, start time, and duration

Example: “Engineer” profile, starting at 100 secs and lasting 1 hour = 3600 secs


Applications within a profile

I define the following applications:

• Database Access (Light)

• Email (Light)

• Web Browsing (Light)

• FTP

Application

Configuration

Object

Profile Definition

Object


E-UTRAN CONFIGURATION

TRANSPORT DIFFSERV AND BW CONFIGURATION


LTE QoS model

In general, QoS is the concept of providing particular quality guarantee for a specific service type

The EPS introduces the concept of

EPS bearers for the QoS support.

EPS bearer is a set of IP flows with a same QoS profile, established between UEs and the P-GW

An EPS bearer is realised by

providing the following subsidiary bearers. radio bearer, S1 bearer and S5/S8

bearer

P-GWS-GW Peer

Entity

UE eNB

EPS Bearer

Radio Bearer S1 Bearer

End-to-end Service

External Bearer

Radio S5/S8

Internet

S1

E-UTRAN EPC

Gi

S5/S8 Bearer

EPS Bearer Service Architecture

Example: Service Data Flows in LTE/SAE (GTP-based S5/S8) with two established EPS bearers. EPS Evolved Packet System

QoS Quality of service


An example of QCI mapping

QCI Packet Delay Budget Packet Loss Rate Example Services

1 (GBR) < 50 ms High (e.g. 10-1) Real Time Gaming

2 (GBR) 50 ms (for E-UTRAN);

80 ms (for UTRAN) Medium (e.g. 10-2) VOIP

3 (GBR) 90 ms Medium (e.g. 10-2) Conversational Packet Switched

Video

4 (GBR) 250 ms Low (e.g. 10-3) Streaming

5 (non-GBR) Low (e.g. 50 ms) e.g. 10-6 IMS Signalling

6 (non-GBR) Low (e.g. 50 ms) e.g. 10-3 Interactive Gaming

7 (non-GBR) Medium (e.g. 250 ms) e.g. 10-4 TCP Interactive

8 (non-GBR) Medium (e.g. 250 ms) e.g. 10-6 Preferred TCP Bulk Data

9 (non-GBR) High (e.g. 500 ms) unspecified Best Effort TCP Bulk Data


QCI, DSCP, OPNET DSCP and transport QoS


DL router diffserve configuration


Last mile BW configuration and diffserve deployment


eNB MAC SCHEDULER CONFIGURATION DIFFERENT TYPES OF SCHEDULERS


eNB Scheduler configuration


EXERCISES


Tasks: configuration and results analysis

Task1: Configure the following configuration and analyze the performance using suitable statistics such as FTP DL time, last mile throughput, Uu throughput etc Traffic model

- FTP traffic model with QCI 9

User and network configuration

- 4 users per cell and 1 eNB scenario

- How many number of users per cell and what is the offered load?

- Ideal transport network

Results should be submitted in the document (ex. word)

Task2: Extend above configured model by adding 6 users who are running HTTP traffic model with QCI9 and also evaluate the performance. How many number of users per cell?

what is the offered load roughly?


Task3: Apply a suitable congested BW at the last mile link (last mile capacity should be lower than the average offered load) and compare the performance with results of the task 2 How many number of users per cell?



Tasks: QoS classification

Task4: configure following scenarios in 1-eNB network configuration

Please submit your conclusion of the above analysis along with few meaning full result statistics (doc or slide format)

Scenarios User and Traffic models per

cell

QOS MAC

scheduler

Last mile

capacity

Scenario-0 10 VoIP, 10 HTTP, and 5 FTP All in best-effort class

(QCI9)

RR Ideal

Scenario-1 10 VoIP, 10 HTTP, and 5 FTP All in best-effort class

(QCI9)

RR Limited

(20 Mbps)

Scenario-2 10 VoIP, 10 HTTP, and 5 FTP HTTP and FTP – BE class

(QCI9) and VoIP – real time

class (QCI1)

RR Limited

(20 Mbps)

Scenario-3 10 VoIP, 10 HTTP, and 5 FTP HTTP and FTP – BE class

(QCI8 and QCI9) and

VoIP – real time class

(QCI1)

RR Limited

(20 Mbps)


Example traffic model configuration VoIP configuration

Codec: AMR 12.2 kbps (GSM EFR)

No silence suppression

50 frames/sec, 1 frame/IP packet

codec delay: 40 ms, Transport: RTP/UDP

Traffic idleness: 0.5 sec, Call duration: const. 90 sec

Call inter-arrival time: const. 90 sec and

neg. exp. with 50 sec mean value

Web traffic model Number of pages per session is 5

Average page size is 100 Kbyte,

number of Object per page is 1 (frame = 1 kbyte and Object size = 100 Kbyte)

Reading time is const (12 sec)

Each page uses separate TCP connection

FTP traffic model File size is const (5 Mbyte)

Interarrival time is uniform(30-60) sec


THANKS

Any Question?

Ppt - Advanced OPNET Tutorial LTE Access

Documents

Transcript of Ppt - Advanced OPNET Tutorial LTE Access