core network design v100r007c00 ngn bandwidth calculation training material

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NGN Bandwidth Calculation Training

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HUAWEI TECHNOLOGIES CO., LTD. HUAWEI Confidential

This document mainly introduces NGN

bandwidth calculation principle and the

introduction of NGN bandwidth calculation

template.


NGN Bandwidth Calculation Template

NGN Bandwidth Calculation Operation

Guide

References


Upon completion this course, you will be able to:

Understand the function of Bandwidth Calculation .

Understand the contents and principle of NGN Bandwidth Calculation .

Grasp the use method of bandwidth calculation template


Chapter 1 Bandwidth calculation overviewChapter 1 Bandwidth calculation overview

Chapter 2 NGN bandwidth calculation Chapter 2 NGN bandwidth calculation principleprinciple

Chapter 3 Chapter 3 Introduction of NGN bandwidth Introduction of NGN bandwidth calculation template calculation template


The Function Of Bandwidth Calculation

Customer requirements

Technique boot

Networking plan

Bid and construction contract

Item startup

product specification research

Project implement cut over

Operation and maintenance

Networking

design

HLD

LLD

DD

Bandwidth result is the important content of network planning and bidding.

Bandwidth result is gist of customer application resource.

Bandwidth result is gist of link configure.


Key Parameters Subscribers

NGN Subscribers

PSTN Subscribers

Traffic Model

Traffic of Busy Hour per Subscriber

Average duration per call

Call Proportion

Redundancy Factor of Bandwidth

Redundancy Factor of the IP Traffic Bandwidth, 0.7 is recommended;

Redundancy Factor of the IP Signaling Bandwidth, 0.7 is recommended;

Redundancy Factor of the TDM Traffic Bandwidth, 0.7 is recommended;

Redundancy Factor of the TDM Signaling Bandwidth, 0.2 is recommended;

The bandwidth calculation result should have redundancy for the quality of bearers.

Link Unbalance Factor

Link Unbalance Factor is needed because two reasons:

The first is that transmission of signaling is duplex. The second is that the sending and receiving of signaling is not balance.

The value of Link Unbalance Factor is recommended to 1.6-2, 1.6 for Huawei equipment.


Contents Of NGN Bandwidth Calculation

SS2

O&M Billing Center

SS1

IP

TDM

Signaling bandwidth calculation

H.248 Singling

Billing bandwidth ca

lculat

ion

EMS bandw

idth calculation

AG2AG1

IP Network

Bandwidth calculation between sites

UMG

PSTN


Function Of Bandwidth CalculationFunction Sheet of Bandwidth Calculation Template

C5 Site Bandwidth Calculation “C5 Site”

C4 Site Bandwidth Calculation “C4 UMG”

C4C5 Site Bandwidth Calculation “C4+C5 Site and UMG”

Bandwidth of each traffic route of C5 “Bandwidth Between Sites”

Bandwidth of each traffic route of C4 “Bandwidth Between UMG”

Bandwidth of each traffic route of C4C5 “Bandwidth Between Sites and UMG”

Bandwidth between Region “Region Traffic”

C4 Bridge E1 Quantity Calculation “C4 Bridge E1 Quantity”

C5 Reconstruction E1 Quantity Calculation “C5 Reconstruction E1 Quantity”

C4+C5 E1 Quantity Calculation “C4+C5 E1 Quantity”

AG Signaling Bandwidth Calculation “AG Signaling Bandwidth”

UMG Signaling Bandwidth Calculation “UMG Signaling Bandwidth”

SG Signaling Bandwidth Calculation “SG Signaling Bandwidth”

IGW Bandwidth Calculation “IGW Bandwidth Calculation”

MRS to IP Bear Network “3.Traffic Bandwidth”

CRBT to IP Bear Network “3.Traffic Bandwidth”

Billing Bandwidth Calculation “2.Signaling Bandwidth”

NMS Bandwidth Calculation “4.N2000”

Bandwidth Calculation Between SS and SHLR “2.Signaling Bandwidth”

Bandwidth Calculation Between SS and MRS “2.Signaling Bandwidth”

Bandwidth Calculation Between SS and AS “2.Signaling Bandwidth”

Bandwidth Calculation Between SS and SCP “2.Signaling Bandwidth”

Bandwidth Calculation Between SS and CRBT “2.Signaling Bandwidth”


Question

1. Why do we have to calculate the bandwidth in network design ？

2. What are the contents of bandwidth calculation?



2.1 Signaling Bandwidth Calculation

2.2 Traffic Bandwidth Calculation

2.3 Traffic Route Analysis

2.4 Bandwidth Between Access Sites

2.5 Supporting Network Bandwidth

Calculation


Formula

Signaling bandwidth (Kbps) = quantity of subscribers or trunks * traffic of busy hour per subscriber or trunk / average duration per call * number of messages * size of a message * 8 / redundancy factor of the signaling bandwidth / link unbalance factor / 1000

Principle of PPS Calculation

PPS = ROUNDUP( quantity of subscribers * traffic of busy hour / average duration per call number of messages / redundancy factor of the signaling bandwidth , 0)

Note:

Quantity of subscribers or trunks * traffic of busy hour per subscriber or trunk / average duration per call = CAPS (Call Attempts Per Second)

The size of a message means the average size of messages during a call process.

The redundancy factor of the bandwidth is different on different bearers.

The size of a message is different on different bearers.

Principle Of Signaling Calculation


Realization:

The main objects of NGN signaling bandwidth calculation are the signaling bandwidth of AG, UMG, and SG equipment.

1.Signaling bandwidth of AG is mainly the bandwidth of H.248 and IUA signaling.

2.Signaling bandwidth of UMG is mainly the bandwidth of H.248 and ISUP/ M2UA signaling.

3.Signaling bandwidth of SG is mainly the bandwidth of ISUP / M3UA signaling.

Key parameters:

The subscribers or trunks in the equipment.

Traffic of Busy Hour per Subscriber or per trunk

Average duration per call

Input the above parameters, then the consequent signaling bandwidth will be calculated.

Bandwidth Calculation Template Introduction


Signaling Bandwidth- Example There are 500 POTS subscribers in the UA5000. Traffic of Busy Hour per

Subscriber is 0.02Erl; Average duration per civil call is 60S. H.248 has 18 messages averagely in a call process. And the size of a message is 266 averagely. Then the signaling bandwidth of the UA5000

= Quantity of subscribers * traffic of busy hour per subscriber / average duration per call * number of messages * size of a message * 8 / redundancy factor of IP signaling bandwidth / link unbalance factor / 1000

=500 *0.02 / 60 *18 * (200 + 66) * 8 / 70% / 1.6 / 1000

=5.7kbps

PPS Calculation

　 Numbers of PPS= ROUNDUP( quantity of subscribers * traffic of busy hour / average duration per call number of messages / redundancy factor of the signaling bandwidth , 0)=ROUNDUP( 500*0.02/60*18/ 0.7,0 ) = 5PPS

Note: PPS Calculation is in order to make sure how many service borad should be used.


Signaling Bandwidth- Example

Bandwidth Calculation Template: Input POTS subscribers 500 , traffic of

busy hour per subscriber 0.02, and average duration per civil call 60S in the

sheet of AG Signaling Bandwidth.Then the bandwidth of H.248 signaling a

nd the consequent PPS will be calculated out.


TD Ｍ Link Calculation

TDM 64K Signaling Link Calculation

TDM E1 Count=ROUNDUP(Trafffic / traffic of busy hour per trunk / 31,0)

TDM 64K Link Count= ROUNDUP(TDM E1 Count*30 / 2000,0)

TDM 2M Signaling Link Calculation

TDM 2M Link Count = ROUNDUP(TDM 64K link Count /16,0)

Before calculate TDM link count, E1 count must be calculate first, then calculate signaling links according to E1 count.


Question

1. What are the parameters when calculate NGN signaling bandwidth refer?

2. What is purpose to calculate PPS?








Calculation


Traffic Bandwidth-Calculation Principle

Formula

Traffic bandwidth (Mbps) = quantity of subscribers or trunks * traffic of busy hour per subscriber or trunk * media stream bandwidth of a call / redundancy factor of the traffic bandwidth

Note:

Quantity of subscribers or trunks * traffic of busy hour per subscriber or trunk ＝ Traffic

Media stream bandwidth of a call: decided by codec and traffic bearers.

E1 quantity = ROUNDUP (quantity of trunk timeslots / 31 )= ROUNDUP (total traffic of trunk / traffic of busy hour per trunk / 31, 0)








Calculation


IP Network

IP Network

Region A Region B

C5 SS

UMG

AG3

UMG

AG7

AG1

AG5AG6

AG8

AG2

AG4

C4

C5 C5

C5

Other Carrier

C4

C5 C5

C5

Other Countries

Other Carrier

Multi-Area C5 Networking


IP Network

IP Network

Region A Region B

C4 SS

UMG

C5 C5

UMG

C5

Other Carrier

Other Countries

Other Carrier

C5

C5 C5

UMG

C5 C5

UMG

Multi-Area C4 Networking


IP NetworkIP Network

Region A Region B

C4C5 SS

UMG

C5

C5

UMG

C5

AG1

AG3AG4

AG2

Other Carrier

Other Countries

Other Carrier

C5 C5

C5

UMG

C5

C5

UMG

Multi-Area C4 + C5 Networking


IP Network

IGW

National TDM Carrier

UMG

International TDM Carrier

International IP Carrier

National IP Carrier

IP

TDM

International Gateway Networking


IP Network

Traffic Route of AG in C4C5

UMG

C5

AG

C5 C5

UMG

AG

C5 C5

Region A Region B

AGAG AG AG

C5 C5


Traffic Route Analysis

Traffic route of AG:

Intra AG (No bandwidth requirement because of hairpin)

Inter AG

AG-UMG

Function of bandwidth calculation template

Total bandwidth of AG

− Calculated by the essential expressions directly.

Inter AG

− The bandwidth between AGs is calculated by the access sites which AGs belong to.

AG-UMG

− Please refer to NGN Bandwidth Calculation Reference Guide.

Note:

The traffic route of UMG is similar to AG, for details please refer to NGN Bandwidth Calculation

Reference Guide.


AG Bandwidth Calculation-Example There are 1000 POTS subscribers in the UA5000. The NGN network is C5, and codec is

G.711 20ms.

Total bandwidth ＝ traffic bandwidth + signaling bandwidth

=Traffic model*media stream bandwidth of a call /redundancy factor of the traffic bandwidth + signaling bandwidth

=quantity of subscribers * traffic of busy hour per subscriber * media stream bandwidth of a call / redundancy factor of the traffic bandwidth + signaling bandwidth

= quantity of subscribers * traffic of busy hour per subscriber *(Proportion of Local Call + Proportion of Toll Call +Proportion to Other Carrier +Proportion of International Call * media stream bandwidth of a call / redundancy factor of the traffic bandwidth + signaling bandwidth =1000*0.02*(0.5+0.1+0.1+0.1)*95.2Kbps/70%/1000 + 0.011 =2.226Mbps

Bandwidth Calculation Template:

Input POTS subscribers 1000 , and traffic of busy hour per subscriber 0.02 in the sheet of C5 site. Click , then the result is calculated out.








Calculation


Bandwidth Between Access Sites-Principle

Bandwidth between access site A and access site B in region S.

Step1: Calculate the A-B traffic (The calculation base on the traffic of A)

− The call ratio of A-B = Proportion of Local Call in A * The total subscribers

in B/ (The total subscribers in region S - The total subscribers in A)

− The traffic of A to B = Total traffic in A * The call ratio of A to B

Step2: Calculate the traffic of B to A (The calculation base on the traffic of B)

− It is the same as Step1.

Step3: Compare the results of Step1 and Step2. Choose the Maximum to put in the

expressions of traffic calculation. Then the consequent traffic bandwidth will be

calculated.

Note:

This example describers the Bandwidth Between Access Sites in NGN C5 scenario, for

other scenario please refer to NGN Bandwidth Calculation Reference Guide.

C5 SS

IP Network

Region S

C

A

B

D


Bandwidth Between Access Sites-Example

There are two sites in region A, site 1 and site 2, subscribers in site1 is 100K, subscribers in site2 is 200K. Traffic of Busy Hour per Subscriber is 0.02Erl, Proportion of Local Call is 80%, The codec is G.711 20ms.

Step1: Calculate traffic between site1 and site2 (The calculation base on the traffic of site1)

Traffic of site1 to site2 = The subscribers in site1 * traffic of busy hour per subscriber * the subscribers in site2 / (the subscribers in region A -The subscribers in site1 ) * Proportion of Local Call

=100K * 0.02 * 200K / (200K + 100K - 100K) * 80% = 1800Erl

Step2: calculate traffic of site2 to site1 (the calculation basing on the traffic of site2)

It is the same as Step1.

Step3: Compare the results of Step1 and Step2. Choose the 3200Erl to put in the expressions of traffic calculation. Then the consequent traffic bandwidth 434.7Mbps will be calculated.

Bandwidth Calculation Template:

Input POTS subscribers, traffic of busy hour per subscriber, and proportion of Local Call in the sheet of C5 site.

Click , then the result will display in the sheet of Bandwidth Between Sites.








Calculation


Network Management Bandwidth

The network management bandwidth = ∑ (bandwidth occupied by SoftX3000 * SoftX3000 quantity, bandwidth occupied by UMG8900 * UMG8900 quantity, …) / redundancy factor of Network Management IP bandwidth.

The following list network management bandwidth of each NE.


Billing Interface Bandwidth -Principle In NGN, the billing interface bandwidth mainly refers to the bandwidth between the i

GWB and the billing center.

Bill transfer between the iGWB and the billing center is performed once per day /

once per week / once or multiple times per month, instead of in realtime mode. The

billing center obtains bills from the iGWB through FTP, or the iGWB uploads bills to

the billing center. Therefore, the bandwidth requirement presented by bill collection

must be considered.

Bandwidth (Mbit/s) = (number of NGN subscribers * average traffic per NGN

subscriber in the busy hour) / average duration per call * 3600 * size of a bill * 8 *

busy-hour duration per day * period for obtaining bills / bill-obtaining duration /

redundancy factor of the IP traffic bandwidth / 1000 / 1000 / 3600


Billing Bandwidth Calculation Example

Assume that in the target NGN, the busy-hour duration per

day is 6 hours, the period for obtaining bills is 30 days, the

bill-obtaining duration each time is 2 hours, and the size of a

bill is 880 bytes. Thus, the required bandwidth = ((100000 +

5000) * 0.02 + (100000 + 5000 + 500 + 500 + 2300 + 2300)

* 0.02) / 60 * 3600 * 880 * 8 * 6 * 30 / 2 / 0.7 / 1000 /

1000 / 3600 = 62.32 Mbit/s.


Question

What are factors affect the traffic bandwidth?

How many kinds of the supporting network bandwidth calculation

include?


Introduction Of Bandwidth Calculation Template

Sheet IntroductionCover: Describe the hand over name, version number and release time.Note: Briefly describe input, output and the meaning of cells color.Input: Input sheet is used for selecting and filling by user. Output: Output sheet show the calculation result.

Application Scope:1.Version SupportSoftX3000 V300R010C03

2. Type of network structure supportC5,C4,C4C5, International Gateway, dual-homing


Note Sheet(Note)

Yellow, gray and brown cells can not be modigy

Green cells, could be modify according to actual

Blue cells, select parameters


Input Sheet(Input)1.Function Switch

2.Parameter input

3.Call proportion parameter input

4.Billing parameter input

5.Redundancy parameter selection

Option according to network structure


Output Sheet(Output)

1.Signaling bandwidth output

2. Signaling bandwidth between sites output

3.Billing bandwidth output


Exclusive Sheet

Scene C5 Function C4 Function Exclusive Sheet

C5 Y N “C5 Site”

“Bandwidth Between Sites”

“C5 Reconstruction E1 Quantity”

C4 N Y “C4 UMG”

“Bandwidth Between UMG”

“C4 Bridge E1 Quantity”

C4C5 Y Y “C4+C5 Site and UMG”

“Bandwidth Between Sites and UMG”

“C4+C5 E1 Quantity”

IGW N N “IGW Bandwidth Calculation”


Summary

Function of Bandwidth Calculation

Factors Affect the Traffic Bandwidth

Principle of Signaling Bandwidth Calculation

Principle of Traffic Bandwidth Calculation

Principle of Network Manage and Billing

Bandwidth Calculation

Use Of Bandwidth Calculation Template

Thank You

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core network design v100r007c00 ngn bandwidth calculation training material

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