Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Mobile & Wireless Introduction


Published on

Published in: Technology
  • Be the first to comment

  • Be the first to like this

Mobile & Wireless Introduction

  1. 1. 4S Communica(ons Believes  In  Engineering4S Communications Privileged and Confidential
  2. 2. Mobile  &  Wireless  Introduc2on • Evolution of Mobile Devices • Wireless Evolution & Overview • Telecommunication Standards • Job Opportunities in Mobile Communications4S Communications Privileged and Confidential
  3. 3. Evolu2on  of  Mobile  Devices Voice Only Voice+Basic Data Voice+Full Data4S Communications Privileged and Confidential
  4. 4. Use  of  Mobile  Devices • What is use of mobile device? • Making and Receiving Calls • Sending and Receiving Text Messages • Browsing Data • Watching YouTube :) • etc... • How do you make calls and browse data?4S Communications Privileged and Confidential
  5. 5. Dissec2on  of  Mobile  Devices • Question is how mobile/UE handles to make or receive call? • To understand this lets get into the architecture of mobile device: Ant1 Ant2 AP/ Chipset/ Display Baseband Skeleton  View  of  UE • Typically any UE contains a user interface (Lamen terms display or AP) to dial or browse. After dialing a number, UE talks to chipset and then transmits over the air via antennas to network and vice-versa.4S Communications Privileged and Confidential
  6. 6. Defini2ons• Now lets understand the terms described in dissection slide: • Baseband/Chipset: Application Layer • Typically any mobile device/UE needs a baseband/chipset to exchange protocols with network. Layer 3 (Network) O S • Chipset contains a protocol stack which talks to Application I layer (AP/Display) Layer 2 (Data Link Layer) M O • Antenna: D E Layer 1 L • Typically used for transmit and receive (Physical) • Transmit: UE to Network (also called Tx or uplink) Antenna • Receive: Network to UE (also called Rx or downlink)4S Communications Privileged and Confidential
  7. 7. Background  of  Communica2ons • Define Communications? • Communication requires a sender, a message, and a recipient, although the receiver need not be present or aware of the senders intent to communicate at the time of communication; thus communication can occur across vast distances in time and space. Communication requires that the communicating parties share an area of communicative commonality. The communication process is complete once the receiver has understood the message of the sender. • Define Telecommunications? • Tele: Distance • Communications 2 itt er Transmission Medium Re sm 1 3 ce an ive Tr r Sender Recipient4S Communications Privileged and Confidential
  8. 8. Wireless  Evolu2on  and  Overview 3GPP  Body GSM GPRS EDGE UMTS HSPA HSPA+ Voice DL:171Kbps DL:384Kbps Voice DL:  14Mbps DL:  42Mbps DL:2Mbps LTE LTE VoLTE Advanced PD DL:  100Mbps DL:  1Gbps e HR UL:  50Mbps UL:500Mbps 3GPP2  Body EVDO EVDO EVDO IS-­‐95 IS-­‐2000 Do  Advanced Rev0 RevA RevB Voice DL:153Kbps DL:2.4Mbps DL:3.1Mbps DL:9.3Mbps DL:14.7bps4S Communications Privileged and Confidential
  9. 9. Radio  Spectrum Abbreviati ITU Frequency & Band name Example uses on band wavelength in air < 3 Hz Tremendously low frequency TLF Natural and man-made electromagnetic noise > 100,000 km 3–30 Hz Extremely low frequency ELF Communication with submarines 100,000 km – 10,000 km 30–300 Hz Super low frequency SLF Communication with submarines 10,000 km – 1000 km 300–3000 Hz Ultra low frequency ULF Submarine communication, Communication within mines 1000 km – 100 km 3–30 kHz Very low frequency VLF 4 Navigation, time signals, submarine communication, wireless heart rate monitors, geophysics 100 km – 10 km 30–300 kHz Low frequency LF 5 Navigation, time signals, AM longwave broadcasting (Europe and parts of Asia), RFID, amateur radio 10 km – 1 km 300–3000 kHz Medium frequency MF 6 AM (medium-wave) broadcasts, amateur radio, avalanche beacons 1 km – 100 m Shortwave broadcasts, citizens band radio, amateur radio and over-the-horizon aviation communications, RFID, Over-the- 3–30 MHz High frequency HF 7 horizon radar, Automatic link establishment (ALE) / Near Vertical Incidence Skywave (NVIS) radio communications, Marine 100 m – 10 m and mobile radio telephony 30–300 MHz FM, television broadcasts and line-of-sight ground-to-aircraft and aircraft-to-aircraft communications. Land Mobile and Very high frequency VHF 8 10 m – 1 m Maritime Mobile communications, amateur radio, weather radio 300–3000 MHz Television broadcasts, microwave ovens, microwave devices/communications, radio astronomy, mobile phones, wireless Ultra high frequency UHF 9 1 m – 100 mm LAN, Bluetooth, ZigBee, GPS and two-way radios such as Land Mobile, FRS and GMRS radios, amateur radio 3–30 GHz Radio astronomy, microwave devices/communications, wireless LAN, most modern radars, communications satellites, Super high frequency SHF 10 100 mm – 10 mm satellite television broadcasting, DBS, amateur radio 30–300 GHz Radio astronomy, high-frequency microwave radio relay, microwave remote sensing, amateur radio, directed-energy Extremely high frequency EHF 11 10 mm – 1 mm weapon, millimeter wave scanner Terahertz imaging – a potential replacement for X-rays in some medical applications, ultrafast molecular dynamics,Terahertz or Tremendously high 300–3,000 GHz THz or THF 12 condensed-matter physics, terahertz time-domain spectroscopy, terahertz computing/communications, sub-mm remote frequency 1 mm – 100 μm sensing, amateur radio4S Communications Privileged and Confidential
  10. 10. Frequencies  and  Bands  Used  in  North  America: Current / Planned Technologies Band Frequency (MHz) 3G, 4G, MediaFlo, DVB-H 700 698–806 GSM, IS-95 (CDMA), 3G 850 824–849 and 869–894 GSM, IS-95 (CDMA), 3G, 4G PCS 1,850–1,910 and 1,930–1,990 3G, 4G AWS 1,710–1,755 and 2,110–2,155North  American  Carrier  frequencies: USA Carrier Voice Frequencies (MHz) 3G 4G 3G Technology 4G Technology AT&T 1900 Band 2, 850 Band 5 1900, 850 MHz 700 Band 17, 1700/2100 MHz GSM/HSPA+ LTE MetroPCS 1900, 1700/2100 1900, 1700/2100 MHz 1700/2100 MHz CDMA LTE 1900 G-Block, 2,500/2,600 MHz), 800 WiMAX (2010–2014) Sprint 1900, 800 1900 MHz CDMA MHz) LTE (since 2012) T-Mobile USA 1900, 1700/2100 1900, 1700/2100 MHz 1700/2100 MHz GSM/HSPA+ LTE (from 2013) Verizon 1900, 800 1900, 800 MHz 700, 1700/2100 MHz CDMA LTE4S Communications Privileged and Confidential
  11. 11. Telecommunica2ons  Standards • ITU (International Telecommunication Union) • IMT-2000 (International Mobile Telecommunication) • 3GPP (3rd Generation Partnership Project) • Ex: GSM, WCDMA, LTE • 3GPP2 (3rd Generation Partnership Project2) • Ex: CDMA, EVDO4S Communications Privileged and Confidential
  12. 12. Job  Opportuni2es  in  Mobile  Communica2ons • Device manufacturing companies • Ex: Samsung, HTC, Microsoft etc.. • Network Operators • Ex: Verizon, AT&T, T-Mobile etc.. • Infrastructure Vendors • Ex: Alcatel Lucent (ALU), Ericsson, Huawei etc • Chipset companies • Ex: Qualcomm, Broadcom, Intel, etc4S Communications Privileged and Confidential
  13. 13. Ques2ons???4S Communications Privileged and Confidential