IE4155 Wireless Communications and Mobile Networks
Part I Continuous Assessment – Homework Assignment
(2 Homework Questions + 1 Presentation)
Semester 2 Year 2023/24
Instructions:
There are Individual Work and Team-based Task in this Assignment.
1. Individual Work: For Question 1 and 2, write your answers on a paper and submit the
hardcopy individually during lesson time in week 8.
2. Team-based Task: For Question 3, do a 5-minute group/team presentation during
lesson time in week 8. Only the Team Leader needs to submit your presentation slides
(on behalf of the team) to the NTULearn course-site before you come to class in week
8.
1. A 4-cell reuse cellular system is being rolled out into an operation area and you are the
engineer taking charge of this project. The subscriber density for the operation area is 600
people per km2. The average traffic load generated per subscriber is 0.2 Er. You are required
to deploy 8 clusters of cells in the operation area and provide a Grade of Service of 0.5%
to the subscribers using the blocked calls cleared model. You found out that the total
number of trunk channels available to the system is 140. Assuming that fixed channel
assignment is used, compute:
a) The traffic load that can be offered to the operation area.
b) The size of the operation area (in km2) that can be supported by the system.
c) The proposed cell area and radius, based on the operation area determined in part (b).
2. Having successfully implemented the first system above, you are now tasked to implement
another system. The requirement is that, this second system must have a cluster size of 7
and provides a Grade of Service of 0.5%. The population density for the operation area is
1200 people per km2 and market penetration rate is 70%, The total number of trunk channels
available to the system is 252 and the system employs blocked calls delayed model. In
addition, a 120o Sectorization technique must be implemented. Assuming that fixed
channel assignment is used, compute:
a) The subscriber density.
b) The traffic load that can be offered to a cluster.
c) The actual carried traffic load, i.e. the actual non-delayed offered traffic load, for each
cluster.
3.
Work as a team to present on the following topic during lesson time in Week 8:
Now that we are using 3/4G cellular communication system, moving towards 5G and with
6G system in development, how do you think the communication system and associated
1
applications will look like in Year 2063 (which is the First Contact Day in the Star Trek
universe - reference: Star Trek First Contact movie).
a. Confine your team presentation time within 5 minutes.
b. Give a quick overview of the 5G cellular system technologies that will be the basis of
your discussion (2 minutes), and then discuss how the communication system and
associated applications will look like in Year 2063 (3 minutes).
c. Due to the 5-minute limit imposed on your presentation, the team may appoint one or
two representatives to present. But do state the contribution of each team member
in the last slide of your presentation.
d. You may look at current development of 6G and/or even get inspiration from movies
like Star Trek First Contact, to talk about the future of the communication system in
Year 2063.
e. Be imaginative, inventive, boldly go where no one has gone before, and have fun!
f. Finally, remember to submit your presentation slides in PowerPoint format to the
NTULearn course-site, before your Week 8 Lesson starts. Only ONE team
representative needs to submit the slides on behalf of the team to the NTULearn
course-site. Name the PowerPoint file after your team name. E.g., if your team name
is “Enterprise”, your PowerPoint file should be named as “Enterprise.pptx”.
2