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Today, we are using at least one smartphone for our day‐to‐day voice, data communications, online gaming, and transaction services. To enable these services, we are also aware of the different mobile communications technologies that are available around us today, such as GSM, GPRS/EDGE, 3G, 4G, and 5G being the latest communication buzzword. If you are wondering and, sometimes, scouring the web regarding how a mobile communications system is designed, developed, tested, and deployed, then this book is for you! This is an introductory jump‐start, foundational, and comprehensive book offering several key concepts encompassing the various practical aspects for the design and development of a mobile communications system and its various entities/elements based on the GSM, GPRS, UMTS (3G), LTE (4G), and 5G technologies. Note that this book is not about the developments of Mobile Application (apps) software that is intended and developed for a specific purpose/requirement.

The content of this book is specially tailored for the rookie computer science or electronics and communications engineering graduate engineer who has just passed out of college, or even for a lesser experienced person looking for an opportunity to work in the mobile telecommunications space through re‐skilling. It starts with the various mobile communications network architectures, identification of a particular network element, the concerned 3GPP standard specifications, various protocols/stacks, as well as the development platforms such as UNIX, and multicore computing. In this book, the reader will also find the troubleshooting of any issue arising out of post‐deployment and operation of a mobile communication network element. This book also introduces the “multicore processor” computing platform that is available around us and is the current buzzword in different areas of technologies, be it the desktop or mobile handset. Mobile telecommunications system development using an embedded system platform is also briefly covered.

A mobile communication network works and communicates based on the standard technical specifications related to a particular mobile communication technology such as the GSM, GPRS, UMTS, LTE, and 5G system. Also, mobile communication standard technical specifications are large in number and can be bewildering to a new learner. Reading and its implementation, through computer code, of the contents of a GSM/GPRS/UMTS/LTE/5G technical specification requires a substantial amount of effort, especially the Layer 1 and Layer 2 protocols. From a technical specification, one would come to know what to and when to transmit or receive information. But what is not available in the 3GPP technical specifications is the how to implement part as it is implementation dependent. This book was written keeping these facts in mind, so that students can learn the practical, real‐world mobile telecommunications domain subject areas and equip themselves while in college, before starting a career in the relevant domains. To make the contents easier to understand, necessary figures, tables, and sample codes are provided to illustrate the underlying concepts. The illustrative figures and concepts are sometimes general in nature, i.e. applicable for GSM/GPRS or UMTS/LTE/5G system, or all of them, and sometimes a straight copy from the concerned 3GPP technical specification with due permissions.

This book is an overview and may not contain exhaustive descriptions or information on various individual components and protocols of a mobile communications system based on the GSM, GPRS, UMTS, LTE, and 5G system. The book attempts to provide the reader with an overall background of the various aspects of an end‐to‐end system development based on the available mobile communication technologies and systems. This book reflects the author's 12 years of experience with a full lifecycle of software research and development, deployment, testing, operation, and maintenance in the areas of mobile communication, Radio Access Network (RAN), and Core Network (CN) domain deployed across the available platforms, including satellite‐based mobile communications systems.

Who should use this book?

Mobile Communications System Development: An Introduction to Practical Approach for Systems Understanding, Implementation , and Deployment is primarily for students who have just graduated in either computer science or electronics and communications discipline and is looking for an exciting career in the mobile communications domain. It is also appropriate for students currently studying in the above‐mentioned disciplines and looking for project work assignments as a part of the academic curriculum in the mobile communication domain. An experienced person from another software domain can also go through this book for a career reboot into the mobile communication domain.

How to use this book?

Mobile communications systems protocol layers, their functions and procedures, and other related information, such as referring to figures, being presented may be brief in nature. For further details about the underlying protocols along with the materials being presented here, the concerned 3GPP technical specification(s) on its website (www.3gpp.org) [1] must be referred to while going through a chapter of this book. The concerned 3GPP technical specifications numbers are mentioned in the References section of the book. The reader is advised to refer to the mentioned 3GPP technical specification and the section number for complete information on the described protocol functions and procedures. Familiarity with the 3GPP website is also important as the reader will be required to visit it quite often to refer to its technical specifications.

Structure of this book

Overall, this book is divided into four parts, each containing several chapters. Each part begins with introductory objectives and also mentions the purposes of each chapter under it. Each chapter is followed by its summary. Also, the book starts with an introductory chapter that provides a brief description of the career opportunities offered by mobile communications systems and network ecosystems.

Part I Introduction

This part contains eight chapters containing the background and introductory aspects and areas of mobile communications systems and networks based on GSM, GPRS, UMTS, LTE, and 5G systems. The materials presented in this part are general in nature but applicable across the mobile communications systems and networks. Even if a reader is starting a career in the LTE or 5G system and network, as a developer or O&M person, one has to know the major key concepts from the legacy GSM/UMTS networks as well.

Part II Operation and Maintenance

This part contains three chapters covering various aspects and areas of the troubleshooting and resolution of mobile communications systems and network issues.

Part III Development of Mobile Communications Systems

This part contains four chapters covering various aspects and areas of the development of mobile communications systems protocol stack and layers based on the 3GPP standards and their technical specifications. This part also describes hardware platforms to be used for the development of mobile communications systems network elements.

Part IV 5G System and Network

This part contains seven chapters covering various aspects and areas of a 5G system and network based on its first Release 15 as standardized by the 3GPP. Also, an overview of the enhancements made into the existing features of the 3GPP Release 15 and the addition of new services or capabilities which have been added as part of the 3GPP Release 16 and Release 17 are covered in this part.

Dibrugarh, Assam, India

Rajib Taid