Computer Science
Mobile Networks
Mobile networks refer to the infrastructure that allows mobile devices to communicate with each other and with the internet. These networks use a combination of radio signals, base stations, and other technologies to provide wireless connectivity. Mobile networks enable users to access voice, data, and multimedia services while on the go, and they are a fundamental component of modern telecommunications.
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7 Key excerpts on "Mobile Networks"
- Badr Benmammar, Asma Amraoui(Authors)
- 2013(Publication Date)
- Wiley-ISTE(Publisher)
1.3. Mobile Networks
1.3.1. Wireless and mobility
The terms “mobile” and “wireless” are often used to describe existing wireless communication systems. It is important to distinguish between the two categories. In wireless networks, the communication medium uses a radio interface: cordless, GSM, GPRS, UMTS, etc. A mobile user is theoretically defined as a user who is capable of communicating outside his/her subscribed network while retaining his/her address. – The cordless system is wireless but not mobile. – Certain systems such as GSM offer mobility and wireless simultaneously.Figure 1.6. Cordless system1.3.2. Mobility
In communication networks, mobility is defined as the ability to access all available services that are usually found in a wired and fixed environment from anywhere.Mobile computing is defined as the possibility for users equipped with portable devices to be able to access services and developed applications through a shared network’s infrastructure, independent of physical location or movement by users.1.3.3. Cellular architecture
In a cellular network, the land covered or the coverage area is generally divided into small geographically limited areas that are commonly called cells. – Pico-cell: it represents an operating space of a few meters in diameter. – Micro-cell: it refers to a geographical area of some tens of meters in diameter. – Cell: it corresponds to an area in which the diameter varies from several hundreds of meters to kilometers. – Macro-cell: it corresponds to a geographical range varying in tens of kilometers in diameter. – Umbrella cell: it covers a region with a diameter of hundreds of kilometers.
- Pei Zheng, Lionel Ni(Authors)
- 2010(Publication Date)
- Morgan Kaufmann(Publisher)
8 Smart Phone and Next-Generation Mobile Computing greater impact on our society than wired networks. The traditional voice-centric, circuit-switching, cellular networks are being replaced by data-centric, packet-switching 2.5 G and 3 G networks. Wireless LANs are being deployed in office buildings, residences, hotels, coffee shops, restaurants, and airports. WiMax, arguably a better “last-mile” solution for wireless broadband network access compared to cable modem or DSL, is likely to be rolled out on a large scale very soon; satellite digital television and radio are reaching an increas- ing number of subscribers. All of these wireless networks, coupled with the underlying wired networks, offer mobility and portabil- ity with sufficiently large bandwidth and high-quality wireless data transmission. With regard to the mobile terminal aspect, it is clear that a mobile device will no longer be considered merely as a communication handset; rather, by providing more powerful computing features such as high-performance mobile processors and large flash mem- ory, a mobile device will be able to accomplish more intensive and intelligent computing tasks such as multimedia processing and data logistics. In particular, the cell phone and PDA are beginning to con- verge into a single device — a smart phone — that offers a full set of applications, including the necessary optimized wireless commu- nication facilities and computing components, seamlessly integrated for an entirely new collection of business and consumer applications. For example, a smart phone may be able to utilize voice over wire- less LAN to allow long-distance calls and roaming between wireless LAN and cellular networks. Also, a user could play a location-based, multiplayer mobile game via Bluetooth during a boring conference session; the locations of the gamers could be determined using the location-sensing capability of the smart phone.
eBook - ePubMobile Cloud Computing
Models, Implementation, and Security
- Meikang Qiu, Keke Gai(Authors)
- 2017(Publication Date)
- Chapman and Hall/CRC(Publisher)
An example of a communication protocol is Transmission Control Protocol (TCP) and Internet Protocol (IP), which is generally known as a TCP/IP. In most situations, TCP/IP is considered a reliable and secure protocol for data transmissions. Meanwhile, another communication protocol, Connectionless User Datagram Protocol (UDP), is generally considered an efficient communication protocol but can only offer a lower-level security standard. The mobile device is another side of mobile computing. The term Mobile Device includes those portable/wearable devices that can carry wireless communications for executing mobile applications. A few examples of mobile devices include laptops, tablets, smart phones, smart watches, digital audio players, portable gaming systems, and other wearable devices. As a service presentation platform, mobile devices are an interface for mobile end users to acquire Internet-based services. Figure 3.3 Three key aspects of mobile computing and examples. The concept of Mobile Software refers to those applications/apps that are executed on mobile devices for mobile service offerings. In this definition, we emphasize that the meanings of mobile applications and mobile apps are different, even though both can describe a service representation program designed for mobile devices. A mobile application needs to be executed/run directly on the Operating System (OS). But a mobile app needs to run within the framework. A common framework for mobile apps is Android. The purpose of using the framework is to shorten the app’s development time. 3.3 WIRELESS NETWORKS Wireless Networks, also known as Wireless Networking Technology (WNT), or Mobile Internet, refers to a set of networking technologies designed for connecting communicators over wireless networks and supporting mobile software. The Communicator refers to a Network Node in wireless networks, which essentially means various workload processing locations and infrastructures
eBook - PDF- R. Kelly Rainer, Brad Prince(Authors)
- 2021(Publication Date)
- Wiley(Publisher)
These numbers are more informative than any name they are given (3G, 4G, etc.) because they indicate exactly what I can expect from my wireless connec- tion. Run this test at competing stores (AT&T, Verizon, Sprint, T-Mobile, etc.), and you will have real data to compare. As names change, you can always run a test to find the facts. Before you go on… 1. What is Bluetooth? What is a WLAN? 2. Describe Wi-Fi, cellular service, and WiMAX. 8.3 Mobile Computing and Mobile Commerce In the traditional computing environment, users come to a computer, which is connected with wires to other computers and to networks. Because these networks need to be linked by wires, it is difficult or even impossible for people on the move to use them. In particular, salespeople, repair people, service employees, law enforcement agents, and utility workers can be more effective if they can use IT while in the field or in transit. Mobile computing was designed for workers who travel outside the boundaries of their organizations as well as for anyone traveling outside his or her home. Author Lecture Videos are available exclusively in WileyPLUS. Apply the Concept activities are available in the Appendix and in WileyPLUS. Mobile Computing and Mobile Commerce 255 Mobile computing refers to a real-time connection between a mobile device and other computing environments, such as the Internet or an intranet. This innovation is revolutionizing how people use computers. It is spreading at work and at home; in education, health care, and entertainment; and in many other areas. Mobile computing has two major characteristics that differentiate it from other forms of computing: mobility and broad reach. Mobility means that users carry a device with them and can initiate a real-time contact with other systems from wherever they happen to be. Broad reach refers to the fact that when users carry an open mobile device, they can be reached instantly, even across great distances.
- S. Kannadhasan, R. Nagarajan, Kaushik Pal, S. Kannadhasan, R. Nagarajan, Kaushik Pal(Authors)
- 2009(Publication Date)
- Bentham Science Publishers(Publisher)
Software Defined Networking Concepts, Applications and Wireless CommunicationS. Abarna,1 , *M. Krishna Kumar1,Kanagaraj Venusamy21 Grace College of Engineering, Mullakkadu, Tuticorin, India2 Department of Engineering, University of Technology and Applied Sciences-AI Mussanah, AI Muladdha, Sultanate of OmanAbstract
This chapter has covered the most popular protocols, including those for Bluetooth, Wi-Fi, WiMAX, and cellular networks. There is a rundown of what is needed to set up a basic wireless network. The literature seeks to describe the most extensively used wireless protocols and technologies. After that, an overview is presented of the advantages of wireless networks over wired systems. In addition, the chapter highlights some of the most serious security vulnerabilities that wireless networks face. There are a variety of approaches that may be employed to reduce these risks and safeguard the network's privacy and security. A thorough examination of the potential applications of wireless networks in education and training is also provided, along with proof that the improvements and affordability of wireless technology have helped the education sector.Keywords: Network, AI, Data mining and Applications, IoT.* Corresponding author S. Abarna: Grace College of Engineering, Mullakkadu, Tuticorin, India; E-mail: [email protected]INTRODUCTION
The introduction of the computer and subsequent development of communication networks may be regarded as the most significant accomplishment of the twenty-first century. This breakthrough has changed the way individuals interact and process information. The network capabilities of computer systems have been used by the government, corporations, and people, and they have all enjoyed considerable advantages. The two most popular types of networks are fixed connections (which employ wires) and wireless networks (which use waves to transmit data). The massive communication network's backbone is fixed connections, which mostly employ fibre optics and Ethernet. Wireless networks, on the other hand, have become more popular in recent years. Wireless networks were limited due to the high cost of wireless equipment, such as integrated routers
eBook - PDF- Paolo Bellavista, Antonio Corradi, Paolo Bellavista, Antonio Corradi(Authors)
- 2016(Publication Date)
- Auerbach Publications(Publisher)
Each user, equipped with a portable device, is able to access miscellaneous 152 ■ Mobile Middleware services in any way at any time and anywhere thanks to the connectivity powered by modern network technologies. Mobile access to distributed applications and services raises many new issues. A major problem is the wireless technology itself, as the bandwidth provided is orders of magnitude lower than in the wired networks, signal loss is very frequent, and the noise level is influenced by external conditions. A second aspect is related to the mobile devices, which are characterized by scarce resources in terms of CPU, RAM, display, and storage; in particular, they are equipped with smart batteries, which limit the autonomy of the device (in terms of power consumption) and affect both wireless transmission and access to services that require a high computational load. Finally, a third aspect that must be considered is user mobility, which causes problems related to signal loss during movement to a new cell (handoff), as well as problems with address management caused by users traversing through different admin-istrative domains and the need to adapt services to the position of the user. Traditional middleware solutions are not able to adequately manage these issues. Originally designed for use in a static context, such middle-ware systems hide low-level network details to provide a high level of transparency to applications. In mobile environments, though, the context is extremely dynamic and cannot be managed by a priori assumptions, so it is necessary to implement reconfiguration techniques that can react to changes in the operating context and develop powerful mechanisms to propagate such changes until the application level is reached. It is necessary, therefore, to develop new middleware for mobile systems in the early stages of the design phase that will provide mobility support.
eBook - PDF- R. Kelly Rainer, Brad Prince(Authors)
- 2020(Publication Date)
- Wiley(Publisher)
This innovation is revolutionizing how people use computers. It is spreading at work and at home; in education, health care, and entertainment; and in many other areas. Mobile computing has two major characteristics that differentiate it from other forms of computing: mobility and broad reach. Mobility means that users carry a device with them and can initiate a real-time contact with other systems from wherever they happen to be. Broad reach refers to the fact that when users carry an open mobile device, they can be reached instantly, even across great distances. Mobility and broad reach create five value-added attributes that break the barriers of geography and time: ubiquity, convenience, instant connectivity, personalization, and local- ization of products and services. A mobile device can provide information and communication regardless of the user’s location (ubiquity). With an Internet-enabled mobile device, users can access the Web, intranets, and other mobile devices quickly and easily, without booting up a PC or placing a call through a modem (convenience and instant connectivity). A company can customize information and send it to individual consumers as a short message service (SMS) (customization). And, knowing a user’s physical location helps a company advertise its prod- ucts and services (localization). Mobile computing provides the foundation for mobile com- merce (m-commerce), to which we now turn. Mobile Commerce Besides affecting our everyday lives, mobile computing is also transforming the ways orga- nizations conduct business by enabling businesses and individuals to engage in mobile commerce. As you saw at the beginning of this chapter, mobile commerce (or m-commerce) refers to electronic commerce (EC) transactions that are conducted in a wireless environ- ment, especially on the Internet. Like regular EC applications, m-commerce can be trans- acted on the Internet, private communication lines, smart cards, and other infrastructures.
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