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wireless communication ppt.pptx

  1. Wireless Communication SEMINAR ON
  2. Agenda
  3. Introduction • Wireless communication involves the transmission of information over a distance without the help of wires, cables or any other forms of electrical conductors. • Wireless communication is a broad term that incorporates all procedures and forms of connecting and communicating between two or more devices using a wireless signal.
  4. Why Wireless Communication ?
  5. • Wireless technology has steadily become a bigger presence in most people’s everyday lives. Whether it’s at work, home, a stadium or even in cars, people rely on wireless tech for information, entertainment to communicate and more. It’s almost hard to imagine how so much got accomplished prior to wireless technology becoming a critical entity in so many different industries and places. • People nowadays are demanding instant communication at same time, they do not want to stick to their desk or devices. • What they want is communication at any time and anywhere, even though they are on move. • Wireless computing can make significant differences in your productivity, responsiveness to the customer. • We can also reduce or eliminate cabling cost and relocate devices without having to rewire your facilities.
  6. What Is Wireless Communication ? Here we will discuss about what we actually mean by wireless communication. What is wireless communication and how it takes place .
  7. Wireless communications is a type of data communication that is performed and delivered wirelessly. This is a broad term that incorporates all procedures and forms of connecting and communicating between two or more devices using a wireless signal through wireless communication technologies and devices. Wireless communication generally works through electromagnetic signals that are broadcast by an enabled device within the air, physical environment or atmosphere. The sending device can be a sender or an intermediate device with the ability to propagate wireless signals. The communication between two devices occurs when the destination or receiving intermediate device captures these signals, creating a wireless communication bridge between the sender and receiver device.
  8. Evolution Of Wireless Tech. Here, we will discuss about the evolution of wireless technology, i.e. how we reached from 1G – 5G and about there different features.
  9. Cellular System Cellular network is an underlying technology for mobile phones, personal communication systems, wireless networking etc. The technology is developed for mobile radio telephone to replace high power transmitter/receiver systems.
  10.  In a cellular structure, a MS (mobile station) needs to communicate with the BS of the cell where the MS is currently located and the BS acts as a gateway to the rest of the world. Therefore, to provide a link, the MS needs to be in the area of one of the cells (and hence a BS) so that mobility of the MS can be supported. Several base stations are connected through hard-wires and are controlled by a BS controller (BSC), which in turn is connected to a mobile switching center (MSC).  Several mobile switching centers are interconnected to a PSTN (public switched telephone network) and the ATM (asynchronous transfer mode) backbone.
  11. Block Diagram Of Cellular System A generic block diagram of cellular system is shown here.
  12. From, Now on we will discuss each component of the block diagram of a cellular system.  A BS consists of a base transceiver system (BTS) and a BSC. Both tower and antenna are a part of the BTS, while all associated electronics are contained in the BSC.  The HLR (home location register) and VLR (visitor location register) are two sets of pointers that support mobility and enable the use of the same telephone numbers worldwide.  The AUC (authentication center) unit provides authentication and encryption parameters that verify the user's identity and ensure the confidentiality of each cell.  The EIR (equipment identity register) is a database that information about identity of mobile equipment. Both AUC and EIR can be implemented as individual stand-alone units or as a combined AUC/EIR unit.  The HLR is located at the MSC where MS is initially registered and is the initial home location for billing and access information.
  13.  The VLR contains information about all MS visiting that particular MSC and hence points to the HLR of the visiting MSs for exchanging related information about the MS.  Such a pointer allows calls to be routed or rerouted to the MS, wherever it is located. In cellular systems, a reverse direction pointer is needed that allows traversal of many control signals back and forth between the HLR and VLR such bidirectional HLR-VLR pointers help in carrying out various functionalities.
  14. Applications…! Following is a list of applications in wireless communication: Vehicles Audio/Video Communication Business in the form of online sales Transportation Industries Replacement of wired network Location dependent service Infotainment
  15. Advantages  Freedom from wires : Can be configured with the use of any physical connection.  Easy to setup : Wireless network is easy to expand and setup  Better or global coverage: It provides global reach by providing networking in places such as rural areas, battlefields, etc… where wiring is not feasible.  Flexibility : Wireless network is more flexible and adaptable compared to a wired network.  Cost-effectiveness : Since it is easy to install and doesn’t require cables, the wireless network is relatively cheaper.
  16. Dis - Advantages  As communication is done through open space, it is less secure.  Unreliability  More open to interference.  Increased chance of jamming.  Transmission speed is comparably less.  it has a limited amount of bandwidth for communication and breaches of network security.  Wireless networks can be easily hacked.
  17. Thank You By – Nidhi Chandra