About this Course

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Have you wondered how “Things” talk to each other and the cloud? Do you understand the alternatives for conveying latency-sensitive real time data versus reliable signaling data? Building on the skills from the Sensing and Actuation course, we will explore protocols to exchange information between processors. 
In this course, you will learn how VoIP systems like Skype work and implement your own app for voice calls and text messages.  You will start by using the Session Initiation Protocol (SIP) for session management. Next, you will learn how voice codecs such as Adaptive Multi Rate (AMR) are used in 3G networks and use them for voice traffic in your app. 

Learning Goals: After completing this course, you will be able to:

1.	Implement session initiation, management and termination on your DragonBoard™ 410c using SIP.
2.	Discover other users and exchange device capabilities.
3.	Compare and contrast narrowband and wideband codecs and experience the voice quality differences between them.
4.	Implement and demonstrate VoIP calls using the DragonBoard 410c.

Flexible deadlines

Reset deadlines in accordance to your schedule.

Shareable Certificate

Earn a Certificate upon completion

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Start instantly and learn at your own schedule.

Coursera Labs

Includes hands on learning projects.

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Approx. 5 hours to complete

English

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Flexible deadlines

Reset deadlines in accordance to your schedule.

Shareable Certificate

Earn a Certificate upon completion

100% online

Start instantly and learn at your own schedule.

Coursera Labs

Includes hands on learning projects.

Learn more about Coursera Labs

Approx. 5 hours to complete

English

Could your company benefit from training employees on in-demand skills?

Try Coursera for Business

Instructors

Instructor rating

4.53/5 (68 Ratings)

Ganz Chockalingam

Principal Engineer

Qualcomm Institute of Calit2, UC, San Diego

112,878 Learners

9 Courses

Harinath Garudadri

Associate Research Scientist

Qualcomm Institute of Calit2, UC, San Diego

112,878 Learners

9 Courses

Syllabus - What you will learn from this course

Content Rating90%(1,006 ratings)

Week1

Week 1

14 minutes to complete

Introduction

14 minutes to complete

1 video (Total 4 min), 1 reading

1 hour to complete

Terminology/Cheat Sheet (Beginner)

In this course, you will see a lot of new words and acronyms you might not be familiar with. If you feel comfortable with your knowledge of tech terminology, feel free to skip these lessons since they will not affect the overall integrity of the course. If you see something that you want to know a little more about, feel free to watch the video to gain insight on some basic concepts. We do expect you to know the majority of this material before going into the next module, we would recommend going through the lessons as a quick brush up.

1 hour to complete

14 videos (Total 42 min)

Week2

Week 2

1 hour to complete

VOIP in a Nutshell

This module will take a high level look at what VoIP is in a nutshell. Essentially, we would like to talk a little more in depth about the key terms you may have seen in module 1. We will also go over a great open source VoIP application called Linphone, and explain a variety of ways you can use this open source code to expand on a VoIP application we will be making later on in the course. We will take a look at SIP and look at some online resources that might help you to understand the inner working of VoIP.

1 hour to complete

17 videos (Total 52 min)

Week3

Week 3

2 hours to complete

Codecs

In this module our esteemed Professor Harinath Garudadri will talk about coders and decoders (Codecs). This will allow us to make better use of the communications in the data plane.We want to look at the motivation behind using Codecs, the different ways to take advantage of redundancies when using codecs and finally the ability to take advantage of different receiver / transmitter combinations. If we are able to understand the way that information is sent and received over the data plane we can create and use the right codecs.

2 hours to complete

15 videos (Total 61 min)

15 videos

Whats to expect in this Module!1mIntroduction to Lesson 11mWhy compress data?3mWhy does it work?5mWhat to look for?3mIntroduction to Lesson 240sAmplitude - Log Companding (PCM)3mTime - Adaptive, Delta Quantization (ADPCM)4mFrequency - ADPCM in multiple subbands (Subband ADPCM)3mIntroduction to Lesson 31mSpeech production model2mLinear Predictive Coding of Speech6m2G / 3G Codecs7mVoice Quality8mVoIP over Wireless7m

1 practice exercise

Module 3 Quiz30m

Week4

Week 4

2 hours to complete

Make your own VoIP application

The main part of this module will focus on you making your very own VoIP application on the Android operating system. In order to do this, you might have to brush up on some of the materials in Course 2. You will be required to use Android Studio to push the application onto your board. You will need to know how to use Git, adb and possibly fastboot in order to accomplish this. We will provide you with the code for your application, but remember, the code we are giving you is only a template that can be used to build a bigger and better application with a wide variety of functions. Once we have built your application and pushed it to your board, we will sit together and brainstorm everything we have seen in the last few courses and take a look at what we are now capable of building in the IoT market.

2 hours to complete

13 videos (Total 43 min), 2 readings, 1 quiz

13 videos

Introduction to Lesson 153sSipProfile2mSipManager3mA look back at Lesson 11mIntroduction to Lesson 21mCode Walkthrough7mDeploy and Demo5mA look back at Lesson 21mIntroduction to Lesson 31mVoIP and the Smart Home6mVoIP and the Smart Office3mMobile VoIP and EoIP3mA look back at Lesson 31m

2 readings

Code for the next Lesson.10m*Extra: The analog expansion header10m

1 practice exercise

Module 4 Quiz30m

Reviews

4.6

106 reviews

5 stars
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4 stars
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3 stars
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2 stars
1.87%
1 star
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TOP REVIEWS FROM INTERNET OF THINGS: COMMUNICATION TECHNOLOGIES

by BPFeb 2, 2019

Was a good course. Videos lectures could be better prepared. The Codecs were a bit complex and needed extra reference material

by SAFeb 14, 2021

The information that was provided with very informative and detailed instructions given was aslo available very link to better graph the concepts of what is happening

by GGFeb 14, 2016

Course is very good!

It would be better if the lessons are more on practical side or practical quiz output

by SVAug 30, 2016

Good course on communication strategies using VOIP which will be useful for the Capstone project.

View all reviews

Frequently Asked Questions

When will I have access to the lectures and assignments?
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The course may offer 'Full Course, No Certificate' instead. This option lets you see all course materials, submit required assessments, and get a final grade. This also means that you will not be able to purchase a Certificate experience.
What will I get if I subscribe to this Specialization?
When you enroll in the course, you get access to all of the courses in the Specialization, and you earn a certificate when you complete the work. Your electronic Certificate will be added to your Accomplishments page - from there, you can print your Certificate or add it to your LinkedIn profile. If you only want to read and view the course content, you can audit the course for free.
Is financial aid available?
Yes. In select learning programs, you can apply for financial aid or a scholarship if you can’t afford the enrollment fee. If fin aid or scholarship is available for your learning program selection, you’ll find a link to apply on the description page.

More questions? Visit the Learner Help Center.

Internet of Things: Communication Technologies

About this Course