We assume that the 3000 household is in Pooraka a suburb of Adelaide where the maximum houses are occupied by working class mid-age parents with teenage children.
For Light User we assume the percentage of users to be around 25% who use the internet on necessity and to gather information.
For Regular User we assume the percentage of users to be around 45% as the area has more households in the mid age group and their usage is to be updated with the latest buzz in the world finance and keep a track of their bills and occasional downloads.
For Heavy User we assume the percentage of users to be around 30% who use the internet for almost everything with the majority being teenage kids who are on the social networking sites, transfer files and watch and download latest music and films online. They use the Internet for almost everything from VOIP calls to sending text message to transferring files and music as well.
The graph indicates the potential connection speed obtainable for ADSL2+ based on your distance from the local phone exchange, using an ADSL2+ compatible modem/router:
To achieve optimal TPG ADSL2+ speeds, customers must use an ADSL2+ capable modem and have filters installed on all telephone outlets. 20%, 50%, 70% of these ADSL2+ customers are achieving speeds of approximately 20Mbps, 15Mbps and 10Mbps respectively. Actual speeds achieved will vary due to a number of factors including distance from the local telephone exchange, network configuration and traffic, the quality of the customer’s copper phone line, EMI, cabling and equipment.
Thus we see that the highest speed achieved in an ADSL2+ network can be around 24 Mbps and varies with distance from the local exchange. Thus, assuming the 3000 households in Pooraka is within 5km from the local exchange and all the households receive the same data rate of 2Mbps.This is the downlink speed now the uplink can be calculated by
= (max uplink / max downlink)*Average Downlink speed achieved
= (1 Mbps/24 Mbps)*2 = 0.08 is the Uplink speed.
VOICE OVER IP
VoIP â€" Per Call Bandwidth
These protocol header assumptions are used for the calculations:
40 bytes for IP (20 bytes) / User Datagram Protocol (UDP) (8 bytes) / Real-Time Transport Protocol (RTP) (12 bytes) headers.
Compressed Real-Time Protocol (cRTP) reduces the IP/UDP/RTP headers to 2or 4bytes (cRTP is not available over Ethernet).
6 bytes for Multilink Point-to-Point Protocol (MP) or Frame Relay Forum (FRF).12 Layer 2 (L2) header.
1 byte for the end-of-frame flag on MP and Frame Relay frames.
18 bytes for Ethernet L2 headers, including 4 bytes of Frame Check Sequence (FCS) or Cyclic Redundancy Check (CRC).
VOIP Bandwidth consumption naturally depends on the codec used. The codec used here is a G.711 which has a bit rate of 64kbps.
Codec Information
Bandwidth Calculations
Codec & Bit Rate (Kbps)
Codec Sample Size (Bytes)
Codec Sample Interval (ms)
Mean Opinion Score (MOS)
Voice Payload Size (Bytes)
Voice Payload Size (ms)
Packets Per Second (PPS)
Bandwidth MP or FRF.12 (Kbps)
Bandwidth w/cRTP MP or FRF.12 (Kbps)
Bandwidth Ethernet (Kbps)
G.711 (64 Kbps)
80 Bytes
10 ms
4.1
160 Bytes
20 ms
50
82.8 Kbps
67.6 Kbps
87.2 Kbps
Assuming that VOIP method of calling is used for all the calls and since it is really inexpensive I assume that the average duration of a call would be about 6mins. Thus the call duration is smaller but all the users in different categories have higher frequencies per hour which varies on the size of the family. Thus assuming the call generation rate to be different for doff time spans.
In this case, the avg. call duration is constant for all three different time intervals as mentioned.
= 6mins = 6*60 s =360sec
Data rate = 64 kbps
Avg talkspurt time = 0.4s -
Total avg talkspurt time = 0.4*360=144s
Total avg data in a call= 144* 64kbps = 9216 kbits.
CASE1: Light Users = 25% of 3000 Household = 750 users
Time span: - 8am to 6pm
Calls generated per hr= 5*
Total data per hr= 9216kbits*5 = 46.080Mbits
Time span: - 6pm to 11pm
Calls generated per hr =2
Total data per hr= 9216kb*2=18.432 Mb
Time span: - 11pm to 8am
Calls generated per hr= 0.3
Total data per hr= 9216*0.3=2.7648 Mb
Total traffic at each LE for VOIP
Time period
Number of users
1 way traffic
Total 1 way traffic
Total 2 way traffic
8am--6pm
750
46.08
34560
69120
6pm--11pm
750
18.432
13824
27648
11pm--8am
750
2.7648
2073.6
4147.2
CASE2: Regular Users = 45% of 3000 Household = 1350 users
Time span: - 8am to 6pm
Calls generated per hr= 7
Total data per hr= 9216kbits*7 = 64.512Mbits
Time span: - 6pm to 11pm
Calls generated per hr =11
Total data per hr= 9216kbits*11=10.137 Mb
Time span: - 11pm to 8am
Calls generated per hr= 0.6
Total data per hr= 9216kbits*0.6=5.5296 Mb
Total traffic at each LE for VOIP
Time period
Number of users
1 way traffic
Total 1 way traffic
Total 2 way traffic
8am--6pm
1350
64.512
87091.2
174182.4
6pm--11pm
1350
10.137
13684.95
27369.9
11pm--8am
1350
5.5296
7464.96
14929.92
CASE3: Heavy Users = 30% of 3000 Household = 900 users
Time span: - 8am to 6pm
Calls generated per hr= 10
Total data per hr= 9216kbits*10 = 92.16Mbits
Time span: - 6pm to 11pm
Calls generated per hr =16
Total data per hr= 9216kbits*16=147.456 Mb
Time span: - 11pm to 8am
Calls generated per hr= 0.9
Total data per hr= 9216kbits*0.9=8.2944 Mb
Total traffic at each LE for VOIP
Time period
Number of users
1 way traffic
Total 1 way traffic
Total 2 way traffic
8am--6pm
900
92.16
82944
165888
6pm--11pm
900
147.456
132710.4
265420.8
11pm--8am
900
8.2944
7464.96
14929.92
WEB BROWSING
The achieved downlink speed that we have assumed here is 2 Mbps as per the question the downlink speed is halved thus the downlink speed in case of web browsing is 1 Mbps.
CASE1: Light Users = 25% of 3000 Household = 750 users
Session duration for light users is 6mins = 360sec
Avg download time = 15sec
Reading time = 120
Percentage of download time = download time/(download time + reading time)
= 15/(15+120) = 0.111 * 100
=11.1%
Total download time in a session = percentage of download* total session time
= 0.111*360= 39.96sec
Avg data rate = 1Mbps
Avg downlink data in a session = 1 M *39.96 = 39.96Mb
Avg uplink data in a session = 25% of downlink
= 9.99 Mb
Total traffic during a session = uplink+ downlink= 49.95Mb
Between 8am to 6pm, 2 sessions are generated per hr
Total data per sec = 49.95Mb *2= 99.9Mb
Between 6pm to 11pm, 1 session are generated per hr
Total data per sec = 49.95Mb *1= 49.95Mbps
Between 11pm to 8am, 0.2 sessions are generated per hr
Total data per sec = 49.95Mbps *0.2= 9.99Mbps
Total traffic at each LE for Web browsing
Time period
Number of users
Downlink rate/hr
Uplink rate/hr
total downlink data
total uplink data
Total uplink+downlink
8am-6pm
750
39.96*2=79.92
9.99 *2=19.98
59940
14985
74925
6pm-11pm
750
39.96*1=39.96
9.99*1=9.99
29970
7492.5
37462.5
11pm-8am
750
39.96*0.2=7.992
9.99*0.2=1.998
5994
1498.5
7492.5
CASE2: Regular Users = 45% of 3000 Household = 1350 users
Time span: - 8am to 6pm
Session duration = 10*60= 600sec
Avg download time = 10sec
Reading Time = 120
Percentage of download time = 10/(10+120)= 0.0769
Total download time in a session = 0.0769*600 = 46.14sec
Avg data rate = 1Mbps
Avg downlink data in a session = 1M *46.14 = 46.14Mb
Avg uplink data in a session = 25% of 46.14= 11.535Mb
Total traffic during a session = 57.675Mb
Time span: - 6pm to 11pm
Session duration = 25*60= 1500sec
Avg download time = 15sec
Reading Time = 180 sec
Percentage of download time = 15/(15+180)= 0.0769
Total download time in a session = 0.0769*1500 = 115.35sec
avg data rate = 1Mbps
Avg downlink data in a session = 1M *115.35 =115.35Mb
Avg uplink data in a session = 25% of 115.35 = 28.838Mb
Total traffic during a session = 139.19Mb
Time span: - 11pm to 8am
Session duration = 15*60= 900sec
Avg download time = 10sec
Reading Time = 120
Percentage of download time = 10/(10+120)= 0.0769
Total download time in a session = 0.0769*900 = 69.21sec
avg data rate = 1Mbps
Avg downlink data in a session = 1M *69.21 = 69.21Mb
Avg uplink data in a session = 25% of 69.21 = 17.303 Mb
Total traffic during a session = 86.513Mb
Total traffic at each LE for Web browsing
Time period
Number of users
Downlink rate/hr
Uplink rate/hr
total downlink data
Total uplink data
Total
uplink+downlink
8am-6pm
1350
46.14*1= 46.14
11.535*1= 11.535
62289
15572.25
77861.25
6pm-11pm
1350
115.35*2=230.7
28.838*2 = 57.676
311445
77862.6
389307.6
6pm-11pm
1350
69.21*0.2=13.842
17.303*0.2=0.346
18686.7
3.460
18690.16
CASE3: Heavy Users = 30% of 3000 Household = 900 users
Time span: - 8am to 6pm
Session duration = 15*60= 900sec
Avg download time = 10sec
Reading Time = 120
Percentage of download time = 10/(10+120)= 0.0769
Total download time in a session = 0.0769*900 = 69.23sec
avg data rate = 1Mbps
Avg downlink data in a session = 1M *69.23 =69.23Mb
Avg uplink data in a session = 25% of 69.23 = 17.308Mb
Total traffic during a session = 86.538Mb
Time span: - 6pm to 11pm
Session duration for = 30*60=1800sec
Avg download time = 15sec
Reading Time = 180
Percentage of download time = =15/(15+180) = 0.0769
Total download time in a session = 0.0769*1800 = 138.42sec
avg data rate = 1Mbps
avg downlink data in a session = 1M *138.42 = 138.42Mb
avg uplink data in a session = 25% of 138.42 = 34.605Mb
Total traffic during a session = 173.025Mb
Time span: - 11pm to 6pm
Session duration = 60*60= 3600sec
avg download time = 20sec
Reading Time = 200
Percentage of download time = 20/(20+200)= 0.091
Total download time in a session = 0.091*3600 = 327.6sec
avg data rate = 1Mbps
avg downlink data in a session = 1M *327.6 = 327.6Mb
avg uplink data in a session = 25% of 327.6 = 81.9Mb
Total traffic during a session = 409.5Mb
Total traffic at each LE for Web browsing
Time period
Number of users
Downlink rate/hr
Uplink rate/hr
total downlink data
total uplink data
Total uplink+downlink
8am-6pm
900
69.23*0.4=27.69
17.308*0.4=6.923
24921
6230.7
31151.7
6pm-11pm
900
138.42*1=138.42
34.605*1=34.605
124578
31144.5
155722.5
11pm-8am
900
327.6*1=327.6
81.9*1=81.9
294840
73710
368550
LARGE FILE DOWNLOADING
CASE1: Light Users = 25% of 3000 Household = 750 users
Download rate = 2Mbps
Time span: - 8am to 6pm
Download size = 50Mbytes= 400Mbits
Session time = 400/2= 200
Session request = 8 pages downloads per hr
Total download data per hr = 400Mb* 8 = 3200Mb
Total upload data per hr = 5% of 3200Mb = 160Mb
Total data per hr = 3200 + 160 = 3360Mb
Time span: - 6pm to 11pm
Download size = 50Mbytes= 400Mbits
Session time = 400/2= 200
Session request = 4 pages downloads per hr
Total download per hr = 4* 400Mb= 1600Mb
Total upload per hr = 5% of 1600Mb = 80Mb
Total data per hr = 1680Mb
Time span: - 6pm to 11pm
Download size = 20Mbytes= 160Mbits
Session time = 160/2= 80
Session request = 0.2 pages downloads per hr
Total download per hr = 0.2* 160Mb= 32Mb
Total upload per hr = 5% of 32Mb = 1.6Mb
Total data per hr = 33.6Mb
Total traffic at each LE for downloading large files
Time period
Number of users
Downlink rate/hr
Uplink rate/hr
total downlink data
total uplink data
Total uplink+downlink
8am-6pm
750
3200
160
2400000
120000
2520000
6pm-11pm
750
1600
80
1200000
60000
1260000
11pm-6am
750
32
1.6
24000
1200
3600
CASE2: Regular Users = 45% of 3000 Household = 1350 users
Download rate = 2Mbps
Time span: - 8am to 6pm
Download size = 40Mbytes= 320Mbits
Session time = 320/2= 160
Session request = 4 pages downloads per hr
Total download data per hr = 320Mb* 4 = 1280Mb
Total upload data per hr = 5% of 1280Mb = 64Mb
Total data per hr = 1280 + 64 = 1344Mb
Time span: - 6pm to 11pm
Download size = 50Mbytes= 400Mbits
Session time = 400/2= 200
Session request = 10 pages downloads per hr
Total download per hr = 10* 400Mb= 4000Mb
Total upload per hr = 5% of 4000Mb = 200Mb
Total data per hr = 4200Mb
Time span: - 11pm to 8am
Download size = 20Mbytes= 160Mbits
Session time = 160/2= 80s
Session request = 0.4 pages downloads per hr
Total download per hr = 0.4* 160Mb= 64Mb
Total upload per hr = 5% of 64Mb = 3.2Mb
Total data per hr = 67.2Mb
Total traffic at each LE for downloading large files
Time period
Number of users
Downlink rate/hr
Uplink rate/hr
total downlink data
total uplink data
Total uplink+downlink
8am-6pm
1350
1280
64
1728000
86400
1814400
6pm-11pm
1350
4000
200
5400000
270000
5670000
11pm-6am
1350
64
3.2
86400
4320
90720
CASE3: Heavy Users = 30% of 3000 Household = 900 users
Download rate = 2Mbps
Time span: - 8am to 6pm
Download size = 20Mbytes= 160Mbits
Session time = 160/2= 80s
Session request = 2 pages downloads per hr
Total download data per hr = 160Mb*2= 320Mb
Total upload data per hr = 5% of 320Mb = 16 Mb
Total data per hr = 320+16 = 336Mb
Time span: - 6pm to 11pm
Download size = 100Mbytes= 800Mbits
Session time = 800/2= 400Mb
Session request = 15 downloads per hr
Total download data per hr = 800Mb*15= 12000Mb
Total upload data per hr = 5% of 12000Mb = 600Mb
Total data per hr = 12000+600 = 12600Mb
Time span: - 11pm to 8am
Download size = 80Mbytes= 640Mbits
Session time = 640/2= 320Mb
Session request = 10downloads per hr
Total download data per hr = 640Mb*10= 6400Mb
Total upload data per hr = 5% of 6400Mb = 320Mb
Total data per hr = 6400 + 320 = 6720Mb
Total traffic at each LE for downloading large files
Time period
Number of users
downlink rate/hr
uplink rate/hr
total downlink data
Total uplink data
Total uplink+downlink
8am-6pm
900
320
16
288000
14400
302400
6pm-11pm
900
12000
600
10800000
540000
11340000
11pm-6am
900
6400
320
5760000
288000
6048000
Task2
CALCULATION OF PEAK TRAFFIC:
Between LE and ISP
Traffic between 8am and 6pm = VOIP (Light Users+ Regular Users+ Heavy User) +
Web Browsing (Light Users+ Regular Users+ Heavy User) +
Large file Downloading (Light Users+ Regular Users+ Heavy User)
Similarly,
Traffic between 8am and 6pm = 5061429.3 Mb/hr = 1405.95 Mbps
Traffic between 6pm and 11pm =19396741.7 Mb/hr = 5387.98 Mbps
Traffic between 11pm and 8am = 130666.2Mb/hr = 36.30 Mbps
Therefore between LE and ISP, the peak traffic is 5387.98 Mbps between the times span 6pm and 11pm.
Between LE and ISP
TIME SPAN
Downlink/hr
Uplink/hr
Peak TRAFFIC
8AM to 6PM
4767745.2
462183.15
6PM to 11PM
13166212.35
1146718.95
11PM to 8PM
6185324.22
385735.48
TIME SPAN
Downlink
Uplink
Peak TRAFFIC
8AM to 6PM
1324.37 Mbps
128.38 Mbps
1452.75Mbps
6PM to 11PM
3657.28 Mbps
318.53 Mbps
3975.81Mbps
11PM to 8PM
1718.15 Mbps
107.15 Mbps
1825.3Mbps
CALCULATION OF AVERAGE HOURLY TRAFFIC:
Average traffic at LE per sec = {(Traffic between 8 am to 6 pm)*10 +
(Traffic between 6pm to 11pm)*5 +
(Traffic between 11pm to 8am)*9}/24
= (1452.75*10 + 3975.81*5 + 1825.3*9)/24
= (14527.5 + 19879.05*5 + 16427.7)/24
= 50834.25/24= 2118.09 Mbps
Total downlink = 6699.8 Mbps
Total Uplink = 554.06 Mbps
554.06/6699.8 = 0.08269 * 100 = 8.26% is the upload capacity of the total capacity.
Task3
T =
