1. Nada Al Dosary Aldosary.na@gmail.com Edited By: Maysoon AlDuwais
CT 1502 Network Planning Methods Lecture 3 (Ch7: Introduction to Networks By Prof.Saad elhaj Bakry)
Nada Al Dosary
Edited By: Maysoon AlDuwais

2. Outlines Access Demands and Network Layout
Use Demands and Traffic Volume
Performance Demands 2

3. Access Demands and Network Layout
Demand on the ability of using the network.
Or Demand on the ability to access the network
Ex: mobile number from the mobile service provider

4. The change of source of demand over the time
Access Demand
Human (Population – Employee…etc) is the source for network demands and the demand change over the years
Time
Change t
Present
t = 0
Past
t < 0
Future
t > 0
Target year
t = T
Source
Of Demand
Population/
users
Number in year (t)
P(t)
Annual growth % p
The change of source of demand over the time
P(t) = P(0)
[1+p]t
Table 1: time factor & source for demand on networks and its growth over time

5. Access Demand Current Status Percentage of users capable to access Net
(from the Source of demand)
S(0)
User percentage: Access Level L
Current number of users
U = P(0).S(0).L
Current Demand
Required access level
I (0)
Overall access demand
D(0) = P(0).S(0).I(0)
Current Demand : waiting to be served
W(0) = D(0) - U
Future Demand
Overall demand in target year (T)
D(T)= P(T).S(T).I(T)
Increase demand
W(T) = D(T) - U
Average of the required annual increment
w(T) = W(T) / T
Table 2: Factors of the current state, current demand and future demand

6. Example1 on Access Demand
The following is an example of the demand on the access on network in five different areas currently and in the future
Network distribution
Current
Status
(t=0)
Source
Usage
Demand
Future
(t=T)

7. Example2 :Investigations of Present Access Demands: An Illustrative
A city with population of 2 million, fined the amount of demand on network access for this city in the following:
Service for Accessing houses phones.
Service for Accessing office phones.
Service for Accessing mobile phones.

8. Example2 :Investigations of Present Access Demands: An Illustrative
A city with population of 2 million, fined the amount of demand on network access for this city in the following:
1. Service for Accessing houses phones:
Average number of residents for each house= 5 persons
P(0)= 2,000,000
Required access level demand is: 1,5 phone per house
Number of phones currently available = 400,000 phone

9. Example2 :Investigations of Present Access Demands: An Illustrative (Table1)
Current Status
of landline phone access service
Current population
P(0) = 2 million
Access demand from houses, house percentage from the population S(0)
S(0) = 1 / PH(0)
PH(0) = 5
(Average number of residents for each house )
S(0) = (1/5) = 0.2
Number of phones
U = 400 thousand
Current access demand:
One phone per house
L = U / (P(0).S(0))
L=400,000/(2,000,000*0.2)=1
Current Demand
Required access level
I (0) = 1.5
Overall access demand
D(0) = P(0).S(0).I(0) =
Demand-based: wait to be served
W(0) = D(0) – U
= 200 thousand

10. The required increment = 200.000 phone
Analyzing the Table1
1. Service for Accessing houses phones:
Current status = phone.
The required increment = phone
Overall access demand = 600,000 phone.

11. Example2 :Investigations of Present Access Demands: An Illustrative (Table2)
A city with population of 2 million, fined the amount of demand on network access for this city in the following:
2. Service for Accessing office phones:
40% of population are employees work in offices.
Current Average employees per office = 4 employees
Required access level = 2 phones per office
Current phones in offices = 300,000 phone per office.

12. Example2 :Investigations of Present Access Demands: An Illustrative (Table2)
Current Status
of landline phone access service
Access demand from office, office percentage S(0)
S(0) = WP(0) / WB(0)
WP(0) = 0.4 is the percentage of working people
WB(0) = 4 Average of worker for each office
S(0) = (0.4/4) = 0.1
Number of phones
U = 300 thousand
Current access demand:
L = U / (P(0).S(0))
L = 1.5/(2,000,000*0.1)=1.5
Current Demand
Required access level
L(0)=2
Overall access demand
D(0) = P(0).S(0).I(0)
=400,000
Demand-based: wait to be served
W(0) = D(0) – U
=100,000

13. The required increment = 100.000 phone
Analyzing the Table2
1. Service for Accessing Offices’ phones:
Current status = phone.
The required increment = phone
Overall access demand = 400,000 phone.

14. Example2 :Investigations of Present Access Demands: An Illustrative (Table3)
A city with population of 2 million, fined the amount of demand on network access for this city in the following:
Service for Accessing mobile phones:
Population capable of using mobile phones = 70%
P(0)= 2,000,000 people
S(0) = 70% = 0.7
Required Access Level = 90%
L(0) = 90% = 0.9
Current no of mobile phones (service) = 700,000 mobile
U = 700,000

15. Example2 :Investigations of Present Access Demands: An Illustrative (Table3)
Current Status
of landline phone access service
Access demand from users capable of using cell phone and
Percentage of population
S(0) = 70% = 70/100 = 0.7
Current available service
U = 700 thousands
Current access level:
L = U / (P(0).S(0))
L = 700,000/(2,000,000 *0.7)=0.5
Current Demand
Required access level
L (0) = 0.9
Overall access demand
D(0) = P(0).S(0).L(0)
= 2,000,000*0.7*0.9
=1,260,000
Demand-based: wait to be served
W(0) = D(0) – U
W(0)= 1,260, ,000
560,000=

16. Analyzing the Table3 1. Service for Accessing mobile’ phones:
Current status = 1,0,0.000 mobile
The required increment = mobile
Overall access demand = 1,260,000 mobile

17. Example3: Investigations of Future Access Demands: An Illustrative
Same as the previous example of mobile phones in table 3, but it estimates the future demand during 10 years.
To estimate the future demand there are two approaches:
First Scenario (Conservative)
Second Scenario (Less conservative)

18. Example3: Investigations of Future Access Demands: An Illustrative
Current
Status
Population
P(0) = 2 million
Current service
U = 700 thousand
First Scenario (Conservative)
Annual population increase
p = 0.03 (3 %)
Users capable of using mobile%
S(T) = 0.7 (70 %)
Required access level
I (T) = 0.9 (90 %)
Second Scenario (Less conservative)
S(T) = 0.8 (80 %)
Required Access Level
I (T) = 1 (100 %)

19. Example3: Investigations of Future Access Demands: An Illustrative
Target
Year
(T)
(duration)
Population P(T)
=P(0) [1+p]T
(million)
Overall demand D(T)
= P(T).S(T).I(T)
Annual increase W(T)
= (D(T) – U) / T
(thousand)
First
Scenario
Second 2
2.122
2.163
1.337
1.730
318.5
515 4
2.251
2.340
1.418
1.872
179.5
293 6
2.388
2,531
1.504
2.025
134
220.8 8
2.533
2,737
1.596
2.190
112
186.25 10
2.688
2.960
1.693
2.368
99.3
166.8

20. Example3: Target Year = 2 Analysis
2,121
1,336
P(T) (First Orientation)
= P(0) [1+p]T
= 2,000,000 * [ ] 2
= 2,000,000*[1+2* ]
= 2,000, ,000+1,800
= 2,121,800 million
Math Rule
[A+B]2 = A2 + 2*A*B + B2
D(T) (First Orientation)
= P(T).S(T).I(T)
= 2,121,800 * 0.7 * 0.9
= 1,336,734 million
W(T) (First Orientation)
= (D(T) – U) / T
= ( ,000 ) / 2
= 318,367 thousand

21. Example3: Investigations of Future Access Demands: An Illustrative
Requirement of annual increase
Second future orientation
Duration
First future orientation
The required annual increase to achieve the required service in the specified period of time 21