Lab 12 Cellular Network Lab
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Jan 9, 2024
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Lab 12
Cellular Networks Lab
CBER 702: Communication
Networks
Lab12: Cellular Networks Lab
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Lab 12
Cellular Networks Lab
Lab 12: Cellular Networks Lab
Scope:
The purpose of this Lab is to obtain an understanding of the Cellular Networks including LTE
topology and important technical parameters.
The student will download the OpenSignal and RX Monitor App from Google Store or App Store.
The urls are:
1. RX Monitor App
https://play.google.com/store/apps/details?id=net.sf.rhino.rxmonitor&hl=en_CA
2.
OpenSignal
http://opensignal.com/android/
http://opensignal.com/iphone/
Students will obtain an understanding of the following:
1. How Smartphones incorporate multiple wireless Technologies and how it is seamless to the
users.
2. Understand the topology and the elements of the identification Numbering Plan for both the
device and 4G networks.
3. Carryout a Field test recording and analyzing the Signal strength, SNR and other parameters
to better comprehend the impact of terrain, building infrastructure and distance on handoff and
coverage.
4. Carryout latency and speed tests and analyze the results to understand the impact of these
on applications.
5. Map Cell towers in their Field Survey and draw a heat map.
Equipment required;
Android or Apple Smart Device
Set Up
1.
Download the OpenSignal App on your phone.
2.
Get familiarised with the tabs and the functionality
3.
Visit OpenSignal Web site to view the Video and the documentation
(
https://www.opensignal.com
)
4.
Take manual speed test measurements
at a minimum of 5 different locations
and note
the results.
5.
Select an area of at least 5 blocks in your neighbourhood to obtain the data.
6.
Screen shots of the Application and Essential learning.
NOTE: Make sure that you have disabled the Wi-Fi connection and are only
using the Cellular Data connection.
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Lab 12
Cellular Networks Lab
1.
Sample Initial Dashboard:
First Screen: Dashboard
Q1: What characteristics will this app allow you to test? Why?
Answer:
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Lab 12
Cellular Networks Lab
2.
Speed test Results and History.
a.
Press “Speed Test”
b.
Do the speed Test in 5 different locations
c.
Close the “Speed Test Results”
d.
Click “History” from Main page
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Lab 12
Cellular Networks Lab
{Provide a snapshot of your screens that you observed for speed test and history}.
Paste SS#1 here
Q2: What do they mean? Why is the uplink and downlink speed different?
Answer:
Q3: Why do they results vary?
Answer:
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Lab 12
Cellular Networks Lab
3.
Video test Results and History.
a.
Go to Home by pressing “
”
at the bottom
b.
Press “Video Test”
c.
Try 3 different test
{Provide a snapshot of your screens that you observed for video test and history}.
Paste SS#2 here
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Lab 12
Cellular Networks Lab
Q4: What are the video characteristics being measured and why?
Answer:
Q5: What would you expect if you were to measure HD video format?
Answer:
4. Neighbourhood:
a.
Go to home screen of Opensignal
b.
Press “
” to open map to to obtain the coverage heat map of your area as shown
below:
c.
For iPhone:
Enter your address in the location and search
{Provide a snapshot of your screens for your neighbourhood}.
Paste SS#3 here
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Lab 12
Cellular Networks Lab
You can also obtain the cell location of all the cells in your area as seen
below:
a.
Press “
”
b.
Click “Cell Tower”
{Provide a snapshot of your screens for Cell Towers}.
Paste SS#4 here
Q6: How would this information be useful for the Wireless operator?
Answer:
Q7: How would this information on the cell locations and heat map be useful to a consumer?
Answer:
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Lab 12
Cellular Networks Lab
5.
Comparison of Performance of Cellular Providers
a.
Go to Map “
”
b.
Press “View Network Stats” (Android) /Press “Compare performances” (iPhone)
{Provide a snapshot of your screens for Network Stats}.
Paste SS#5 here
Q8: How would the network stats information be useful for the Wireless operators?
Answer:
Q9: How would the network stats be useful to a consumer?
Answer:
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Lab 12
Cellular Networks Lab
6.
Numbering Plan
(for iPhone may not work)
a.
Press “
”
b.
Click “Cell Tower”
c.
Click 3 bars shown below:
d.
Following screen will display
{Provide a snapshot of your screens for Numbering Plan}.
Paste SS#6 here
Q10: What does CID and LAC stand for?
Answer:
Q11: What does the table represent?
Answer:
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Lab 12
Cellular Networks Lab
7.
Data from the App RX Monitor for Android
(For iPhone skip this step)
7.1 Overview of Rx Monitor
a.
Run “Rx Monitor”
b.
Following screen will display
{Provide a snapshot of your screens for Overview of Rx Monitor}.
Paste SS#7 here
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Lab 12
Cellular Networks Lab
Q12: What do the following represent:
a)
MCC:
b)
MNC:
c)
RSRP:
d)
RSRQ:
7.2 Finding Neighbour Cells
{Provide a snapshot of your screens for Neighbour cells}.
Paste SS#8 here
Q13: What does the above picture represent? Why is the important to know about the
neighboring cells and the parameters provided?
Answer:
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Lab 12
Cellular Networks Lab
7.
iPhone Field Test Mode Signal Strength Indicator
(For Android skip this step)
(
https://www.weboost.com/blog/how-to-access-iphone-field-test-mode
)
https://www.youtube.com/watch?v=Zq8s0yT_JXM
7.1 Turn off the phone’s WiFi connection
7.2 Open the Phone app
7.3 On the keypad, dial *3001#12345#*
7.4 Press call
7.5
The field test mode menu. To view your phone’s signal strength in dBms for the
nearest cellular tower:
7.5.1
Select LTE if given the option. On some iPhones, you may be taken directly
to the next step.
7.5.2
Select Serving Cell Meas (LTE Serving Cell Meas)
7.5.3
Select rsrp0.
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Lab 12
Cellular Networks Lab
Selecting rsrp0 tells you the strength of the signal you’re receiving from the nearest cell
tower. If you choose rsrp1, you’re getting a reading from a further tower
If you are using iOS 14 and later, then the hidden field test mode interface has been redesigned. To
access field test mode on iOS 14, you follow the same steps listed above. You will then be taken to a
dashboard where you can see your LTE dBm reading and other metric data
{Provide a snapshot of your screens for Overview of LTE Serving Cell Meas}.
Paste SS#7 here
Q12: What is the strength of signal for the Nearest Tower
Answer:
Q12: What is the strength of signal for the Second Nearest Tower
Answer:
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Lab 12
Cellular Networks Lab
8.
Network/ Device Analysis
Q14: How do devices support multiple technologies such as Wi-Fi, 3g and 4G?
Answer:
Q15: What determines what technology will be used? Give 2 examples
Answer:
Q16. Use your data gathered to support your arguments.
Answer:
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Lab 12
Cellular Networks Lab
Lab Challenge: Cellular Networks Practice Questions
1.
Consider three different cellular systems that share the following characteristics:
The frequency bands are 0.910 GHz to 0.938 GHz for uplink and 0.960 GHz to 0.988
GHz for downlink transmission.
A duplex circuit consists of one 38-KHz channel in each direction
The systems are distinguished by reuse factor, which is 4, 7, and 12 respectively.
A)
Suppose that in each of the systems, the cluster of cells (4, 7, and12) is duplicated 15
times. Find the number of communications that can be supported by each system. (Show
your work in detail)
a)
What is the uplink and down link bandwidth available?
(Show your work in detail)
b)
What is the total # of channels available?
(Show your work in detail)
c)
What is the total # of simultaneous cells that can be supported by the system?
(Show your work in detail)
B)
Find the number of simultaneous communications that can be supported by a single cell
in each system?
a)
For System #1 (4 cell cluster)
(Show your work in detail)
b)
For System # 2(7 cell cluster)
(Show your work in detail)
c)
For System # 3(12 cell cluster)
(Show your work in detail)
C)
What is the area covered, in cells, by each system?
a)
For System #1 (4 cell cluster)
(Show your work in detail)
b)
For System # 2(7 cell cluster)
(Show your work in detail)
c)
For System # 3(12 cell cluster)
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Lab 12
Cellular Networks Lab
(Show your work in detail)
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