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Long Term Evolution (LTE)

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  • 1. Tinniam V Ganesh [email protected]/01/12 Tinniam V Ganesh - 1
  • 2. Market conditions Mobile data is growing at an exponential speed Mobile data in US & Europe expected to grow at a CAGR of 55% & 42% respectively Mobile data revenues expected to grow at a rate of 18% Mobile broadband connections will reach 1 billion by 2012 segmented between 3G & 4G technologiesHighlights Annual IP traffic will exceed a zettabyte in 4 years by 2012 (10 21) Internet video (Youtube, DVD sharing ,IPTV) account for 30% of IP traffic Video communication and dynamic video will increase the burden on the network Global IP traffic will double every two years to 2010 and beyond04/01/12 Tinniam V Ganesh - 2
  • 3. The explosion of mobile dataIn the last 2 years 1 billion new mobile subscriptions added 2 billion wireless devices soldDevice range from Mobile phones, Smartphones, Netbooks, PDAs, Wireless dongles and Tablets Currently there are 3.5 billion subscribers worldwide 3G accounts for 350 million with 30 million added every quarter LTE forecast to reach 32.6 million by 201304/01/12 Tinniam V Ganesh - 3
  • 4. The rise and rise of data04/01/12 Tinniam V Ganesh - 4
  • 5. Growth in data traffic04/01/12 Tinniam V Ganesh - 5
  • 6. The birth of LTETo handle the growth in mobile data traffic a feasibility study on theUTRA & UTRAN Long Term Evolution was started in December 2004.The objective was "to develop a framework for the evolution of the 3GPP radio-access technology towards a high-data-rate, low-latency and packet-optimized radio-access technologyIn 3GPP Rel 8 the specifications of the EPS (Evolved Packet Core) which consisted of the E-UTRAN (Enhanced UMTS Terrestial Radio Access Network) and EPC (Evolved Packet Core) was created.04/01/12 Tinniam V Ganesh - 6
  • 7. Elements of the LTE SystemLTE encompasses the evolution of Radio access through E-UTRAN (eNodeB) Non-radio aspects under the term System Architecture Evolution (SAE)Entire system composed of LTE & SAE is called Evolved Packet System (EPS)At a high level a LTE network is composed of Access network comprised of E-UTRAN Core Network called Evolved Packet Core (EPC)04/01/12 Tinniam V Ganesh - 7
  • 8. LTE Network Elements UE User Equipment used to connect to the EPS (Evolved Packet System). This is an LTE capable UE The LTE network is comprised of a) Access Network b) Core Network Access network ENB (eNodeB) The evolved RAN consists of single node, the eNodeB that interfaces with UE. The eNodeB hosts the PHY,MAC, RLC & RRC layers. It handles radio resource management & scheduling. Core Network (Evolved Packet Core-EPC) MME (Mobility Management Entity) Performs paging, chooses the SGW during UE attach S-GW (Serving Gateway) routes & and forwards user data packets P-GW (Packet Gateway) provides connectivity between the UE and the external packet networks.04/01/12 Tinniam V Ganesh - 8
  • 9. LTE Network Elements04/01/12 Tinniam V Ganesh - 9
  • 10. LTE Network Elements04/01/12 Tinniam V Ganesh - 10
  • 11. LTE Technologies LTE uses OFDM (Orthogonal Frequency Division Multiplexing) for lower latency and better spectral efficiency Uses MIMO (Mulitple In Multiple Out) LTE uses several transmit & receive paths reducing interference with increase in spectral efficiency and throughput. Flatter architecture Fewer Network elements in the LTE Evolved Packet Core(EPC). This results in lower latency because of lesser number of hops as compared to 3G. Absence of RNC like Network Element(NE).04/01/12 Tinniam V Ganesh - 11
  • 12. Operator strategies for LTE deploymentVoice & SMS are the main source of revenue for the telecom companies. LTE strategy should be one of the following3. Data only services on LTE4. Data only services on LTE with 2G 3G voice5. Data service on LTE and IMS based VOIP (VoLTE)6. Voice and data service on LTE (VoLGA)The above 3 strategies are not alternatives but a path for evolution10. Data only option targeted to customers with LTE dongles, netbooks, air cards etc11. Voice will remain a major revenue generator for CSP. LTE for data an 2G- 3G network for voice calls. Operators will need to implement a CS-Fallback option (3GPP 23.272) to support voice on 2G-3G networks. The call will fall back to GSM-UMTS network for voice12. Voice and data service on LTE uses the IMS for voice services and LTE for data. This is based on an all IP network. On Feb 15,2010 the One Voice was adopted by GSMA as the Voice over LTE (VoLTE). This is an end-to-end LTE ecosystem.04/01/12 Tinniam V Ganesh - 12
  • 13. 04/01/12 Tinniam V Ganesh - 13
  • 14. 2.5G GPRS Network Elements04/01/12 Tinniam V Ganesh - 14
  • 15. LTE Network Elements04/01/12 Tinniam V Ganesh - 15
  • 16. LTE & 3G Network Elements04/01/12 Tinniam V Ganesh - 16
  • 17. 3.99G (4G) LTE Upto 100 Mbps 2009+04/01/12 Tinniam V Ganesh - 17
  • 18. ~100 Mbps LTE 201004/01/12 Tinniam V Ganesh - 18
  • 19. The evolution of mobile technology Year Standards Technological evolution 1. 1999 3GPP Rel 99 GSM, GPRS, EDGE, UMTS based (2G, 2.5G, 2.75G, 3G) 2. 2001 3GPP Rel 4 Minor upgrades to UMTS, radio interface 3. 2002 3GPP Rel 5 HSDPA , IMS architecture (3.5G) 4. 2005 3GPP Rel 6 Higher speeds 5. 2007 3GPP Rel 7 HSPA+,PoC, Voice & Video over VOIP 6. 2008 3GPP Rel 8 EPS (E-UTRAN/LTE) (3.99G/4G) 7. 2009 3GPP Rel 9 Enhancement to EPS 8. 2010 3GPP Rel 10 LTE- Advanced (4G)04/01/12 Tinniam V Ganesh - 19
  • 20. LTE Development Timeline04/01/12 Tinniam V Ganesh - 20
  • 21. Technological Evolution04/01/12 Tinniam V Ganesh - 21
  • 22. Evolutionary path for LTE LTE will have to co-exist with the existing technologies like 2G,2.5G & 3G. Operators need to plan LTE deployment in an ecosystem comprising 2G,3G & 4G technologies04/01/12 Tinniam V Ganesh - 22
  • 23. Forecasted market share of various technologies04/01/12 Tinniam V Ganesh - 23
  • 24. LTE benefits LTE provides download speeds of 100 Mbps downlink and 50M