Internet of Things: Communication Technologies

所在平台: Coursera

课程主页: https://www.coursera.org/learn/internet-of-things-communication

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课程简介

课程名称：物联网：通信技术 课程概述：你是否想过“物”是如何相互沟通和与云端交流的？你理解在传输对延迟敏感的实时数据和可靠信号数据的替代方案吗？在此课程中，我们将在传感与执行课程的基础上，深入探讨用于不同处理器之间信息交换的协议。 在本课程中，你将学习像Skype这样的VoIP系统是如何工作的，并实现自己的语音通话和短信应用。你将首先使用会话发起协议（SIP）进行会话管理；接着，你将学习在3G网络中使用的自适应多速率（AMR）语音编解码器，并在你的应用中使用它们进行语音流量的处理。 学习目标：完成本课程后，你将能够： 1. 在你的DragonBoard™ 410c上实现会话的启动、管理和终止，使用SIP。 2. 发现其他用户并交换设备能力。 3. 比较窄带和宽带编解码器，并体验它们之间的语音质量差异。 4. 使用DragonBoard 410c实现和演示VoIP通话。 课程大纲： 1. 第一部分：术语/备忘单（初学者） 描述：在本课程中，你将看到许多你可能不熟悉的新单词和缩写。如果你对科技术语的掌握很自信，可以选择跳过这些课程，因为它们不会影响课程的整体完整性。若想进一步了解某些基本概念，欢迎观看视频。 2. 第二部分：VoIP概述 描述：本模块将高层次看待VoIP的基本概念，并讨论可能在第一模块中看到的一些关键术语。同时，我们将介绍一个出色的开源VoIP应用程序Linphone，并解释如何利用该开源代码扩展我们稍后将在课程中开发的VoIP应用。 3. 第三部分：编解码器 描述：在本模块中，我们的教授Harinath Garudadri将讨论编解码器（Codecs）。我们将探讨使用编解码器的动机、利用冗余的不同方法，以及如何利用不同的接收器/发射器组合，从而更好地利用数据平面中的通信。 4. 第四部分：制作自己的VoIP应用 描述：本模块的主要部分将集中在你制作自己的Android操作系统VoIP应用。为此，你可能需要复习第二课的一些材料，你将需要使用Android Studio将应用推送到你的开发板上。你需要掌握Git、adb及可能的fastboot等工具来完成这一任务。我们将提供应用的代码，这些代码只是一个模板，可用于构建更大更强大的多功能应用。一旦完成应用的构建并推送到你的开发板上，我们将共同探讨之前课程中的所有知识，展示我们在物联网领域的能力。

课程大纲

Part: 1

Title:Terminology/Cheat Sheet (Beginner)

Description: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.

Part: 2

Title:VOIP in a Nutshell

Description: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.

Part: 3

Title:Codecs

Description: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.

Part: 4

Title:Make your own VoIP application

Description: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.

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