Lte introduction
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Introduction to LTE technology
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Lte introduction
- 1. LTE Long Term Evolution – The next generation of telecommunication
- 2. Topics • introduction • history • features • competitor -WiMAX • problems of LTE • what’s next
- 3. Introduction • next generation of Telecommunication network following the UMTS/HSPA+ • the standard is developed by the 3GPP (3rd Generation Partnership Project)
- 4. Not 4G
- 5. History • first Proposed by NTT DoCoMo in 2004 • first publicly launched by TeliaSorena in 2009
- 7. Features • IP-based network • peak data transfer rate - downlink 300 Mbps and uplink 75 Mbps • transfer latency less than 5 ms • ability to manage fast-moving mobiles • supports multi-cast and broadcast streams • provide up to 20MHz of spectrum • seamless handover with older network technology (GSM, UMTS, CDMA2000)
- 8. Inside
- 9. Competitor WiMAX vs LTE who is the winner?
- 10. WiMAX • IEEE 802.16 standard • up to 141 Mbps downlink and 138 Mbps uplink data transfer rate • mostly use as PC cards or USB dongles • support Peer-to-Peer (ad hoc)
- 11. Comparison WiMAX LTE Downlink OFDMA Uplink OFDMA SC-FDMA Architecture All-IP FDD (802.16m) Spectrum FDD and TDD TDD Spectrum flexibility Fixed bandwidth Flexible bandwidth Services/Apps IMS (IP Multimedia Subsystem) Standards IETF 3GPP
- 13. Problems of LTE And solutions
- 14. Voice calls • LTE support only packet switching • Voice calls in GSM, UMTS and CDMA2000 are circuit switched
- 15. • How can we use regular voice call or SMS on LTE? • How can we refer to handset number on IP-based network? • How can we handle to continue voice call on 2G/3G when the LTE network disappear?
- 16. Solution (in development) • VoLTE – Voice over LTE • based on IMS (IP Multimedia Subsystem) • similar to VoIP • CSFB – Circuit Switched Fallback • LTE provides only data services • fallback to circuit switched when do voice call • SVLTE – Simultaneous Voice and LTE • handset works simultaneously on both LTE and CS • based on handset - no special requirements on the network
- 17. Handsets • limited number of handset models are supported • every LTE handsets still very expensive
- 18. What’s next
- 19. LTE Advanced • scalable system bandwidth up to 100 MHz • support relay node base stations • up to 3.3Gbps peak download rates (with aggregated 100 MHz bandwidth) • Yota is the first carrier to provide commercial LTE Advanced • launched on October 2012 • but no compatible handset available until 2013
- 20. Thank you Now it's time for Q&A
- 22. References • http://gsmcommunications.blogspot.com/2011/04/lte-vs-wimax-4g- comparison.html • http://www.slideshare.net/hamdani2/lte-long-term-evolution • http://en.wikipedia.org/wiki/LTE_(telecommunication) • http://www.4gamericas.org/index.cfm?fuseaction=page§ionid=2 49 • http://www.pcworld.com/article/259471/
Hinweis der Redaktion
- NTT DoCoMo is Japanese mobile network operatorTeliaSorena is SwedishLaunched in Oslo and Stockholm
- more than 110 LTE networks in 41 countries today
- GSM-based standard is a full duplex, digital, circuit switched networkHSPA has transfer latency of <50 msHSPA+ provides data rates up to 84 Mbit/s in the downlink and 10.8 Mbit/s
- IEEE 802.16e-2005 is the most popular standardThe latest standard is 802.16m
- SVLTE – handset will be very expensive and high power consumption
- How country side people can access this technology?
- Russian mobile carrier