1 / 22

4th Generation Communication

Recent trends in 4G Technology has been discussed.

33970
Download Presentation

4th Generation Communication

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 4G TECHNOLOGY PRESENTED BY VISHAL EASWARAN.B

  2. 4G Definition • 4G is not one defined technology or standard, but rather a collection of technologies at creating fully packet-switched networks optimized for data. • 4G Networks are projected to provide speed of 100Mbps while moving and 1Gbps while stationary.

  3. 2G Technology • Around 1980’s • Better quality & capacity - More people could use there phones at the same time • Digital Signals – consist of 0’s & 1’s

  4. Previous Technology - 2G • Digital – consist of 0’s and 1’s • Digital signal: • 1.Low level, 2.High level, 3.Rising edge and 4.Falling edge

  5. Previous Technology - 2G • Digital data can be compressed and multiplexed much more effectively than analog voice encodings • Multiplexing -multiple analog message signals or digital data streams are combined into one signal • For 1 and 2G standards, bandwidth maximum is 9.6 Kbit/sec, (I.E) approximately 6 times slower than an ISDN

  6. Previous Technology - 2G • Allows for lower powered radio signals that require less battery • Power–CODEC introduction -program that encodes and decodes digital data stream or signal • Translates data from digital to analog and vice versa

  7. Previous Technology - 2G

  8. Advantages in Previous Technology - 2G • The digital voice encoding allows digital error checking • increase sound quality • lowers the noise level • Going all-digital allowed for the introduction of digital data transfer • SMS –“short message service” • E-mail

  9. Disadvantages in Previous Technology - 2G • Cell towers had a limited coverage area • Jagged Decay curve • Abrupt dropped calls • Analog –gradual sound reduction • “Spotty” coverage

  10. 3G Technology • Large capacity and broadband capabilities • Allows the transmission of 384kbps for mobile systems and up to 2Mbps • Increased spectrum efficiency –5Mhz • A greater number of users that can be simultaneously supported by a radio frequency bandwidth • High data rates at lower incremental cost than 2G–Global roaming

  11. Previous Technology - 3G • CDMA –Code Division Multiple Access • Form of multiplexing • Does not divide up the channel by time or frequency • Encodes data with a special code associated with each channel

  12. Code Division Multiple Access

  13. CDMA? • CDMA - Code Division Multiple Access • Each phone call is uniquely encoded and transmitted across the entire spectrum, in a manner known as spread spectrum transmission

  14. Reasons for New Research • Even though 3G has successfully been introduced to mobile users, there are some issues that are debated by 3G providers and users. • High input fees for the 3G service licenses • Great differences in the licensing terms • 3G phones are expensive

  15. Fourth Generation

  16. What is 4G? • Fourth Generation Technology • Faster and more reliable • 100 Mb/s • Lower cost than previous generations • Multi-standard wireless system • Bluetooth, Wired, Wireless • Ad Hoc Networking • IPv6 Core • OFDM used instead of CDMA • Potentially IEEE standard 802.11n • Most information is proprietary

  17. Communications Architecture • Broadcast layer: • fix access points, (i.e.) cell tower connected by fiber, microwave, or satellite (ISP) • Ad-hoc/hot-spot layer: • wireless LANs (i.e. internet at Starbuck’s)

  18. Communications Architecture • Personal Layer Gateway: • devices that connect to upper layers; cell phone, fax, voice, data modem, MP3 players, PDAs • Info-Sensor layer: • environmental sensors • Fiber-optic wire layer: • high speed subterranean labyrinth of fiber optic cables and repeaters

  19. Ad Hoc Networks • Spontaneous self organization of networks of devices • Not necessarily connected to internet • 4G will create hybrid wireless networks using Ad Hoc networks • Form of mesh networking–Very reliable

  20. Enhance Mobile Gaming • Experience enhance wireless capabilities that deliver mobile gaming interaction with less than five seconds • Play online multi player games while traveling at high speeds or sitting outside

  21. Broadband access in Remote location • 4G will provide a wireless alternative for broadband access • 4G will provide first opportunity for broadband access in remote locations without an infrastructure to support cable or DSL access.

  22. Thank You

More Related