LTE Essentials. Thursday, January 17, 2013 at 1:00 PM (ET)

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1 LTE Essentials Thursday, January 17, 2013 at 1:00 PM (ET) Instructor: Annabel Z. Dodd Author of "The Essential Guide to Telecommunications, Fifth Edition

2 Questions for the Instructor or for a Logistics Issue Use the chat feature on the online player or ssullivan@teamlightbulb.com or Call

3 Long Term Evolution Essentials LTE advantages Radio access network Backhaul The Evolved Packet Core Where do we go from here? 3

4 The Rationale for LTE The criticality of mobile networks The impact of video on capacity Desire for revenue 4

5 3G Packetized Data; Circuit Switched Voice Third Generation protocols: WCDMA CDMA2000 3G capabilities Circuit switched voice IP format for data Browsing can be frustratingly slow Advanced 3G - HSPA+ Additional capacity for data Circuit switched voice Inefficient use of spectrum 5

6 A Network Overview: Cell Sites, Backhaul & Core Radio access network Backhaul Aggregated backhaul network Core network Cell sites In LTE the core is referred to as the Evolved Packet Core (EPC) 6

7 Cell Sites 3G NodeB 4G enodeb Base station Takes signals on & off air Software defined radios Communicates with core Tower & base station Base station & tower 3G vs. 4G Radio network controller 7

8 Spectral Efficiency in LTE MIMO (Multiple Input Multiple Output) antenna OFDM (Orthogonal Frequency Devision Multiplexing) air interface 30 to 40% more capacity 8

9 TD LTE vs. FD LTE Frequency Division LTE Verizon & AT&T Europe Two spectrum bands: One for downlink to customers devices The other for uplink to the mobile carrier s cell site Time Division LTE China Mobile Sprint Clearwire One spectrum band for both uplink and downlink 9

10 TD & FD LTE Frequency Division Duplex Time Division Duplex Two separate bands of spectrum for signals 10 A single band of spectrum for Uplink & downlink between the antenna & mobile device

11 Increasing the Number of Cell Sites for Increased Capacity Per FCC as of June 2012: 285,561 cell sites in U.S. Yikes China Mobile has 800,000 cell sites A B2 C C2 B A2 11

12 What are the Challenges of Small Cell Sites? Upgrades Installation Maintenance Connections to backhaul 12

13 The Evolved Packet Core All IP Streamlined EPC Made up of routers and switches 13

14 Fourth Generation Evolved Packet Core Architecture Evolved packet core PGW* Internet & Other mobile networks SGW* MME* HSS EnodeB EnodeB Bearer channels for user data Signaling (Control) channels EnodeB Radio access network 14 HSS - Home subscriber service SGW Serving gateway MME Mobility management entity PGW Packet data network gateway

15 The Core Applications & Control 3G Packet Core Internet Signaling Voice & data traffic 4G evolved packet core P GW GGSN SGSN Billing, roaming, short messaging service (databases and services) MME SGW RNC NodeB GGSN: GPRS Gateway Support Node SGSN: Signaling Gateway Service Node RNC: Radio Network Controller 15 enodeb MME: Mobility Management Entity SGW: Serving Gateway PGW: Packet Data Network gateway

16 Circuit Switched Fallback Evolved packet core Internet & enterprise data networks SGSN PGW* SGW* MME HSS (Home Subscriber Server) roaming and subscriber data EnodeB Bearer channels for user data Signaling channels 13:04 EnodeB 16 SGW Serving gateway MME Mobility management entity PGW Packet data network gateway SGSN - Signaling Gateway Service Node

17 What s Next? LTE-Advanced (Release 10) Gigabit speeds 8x8 antennas Dynamic aggregation of spectrum Relay connections between micro cells & macro (large) cell sites Aggregated spectrum 17 Relay link between micro and macro base stations

18 Challenges Ahead Competition from over the top (OTT) vendors Free video & international calls Skype Free text messages Spectrum availability How to make up for lost voice revenue Volte complex, costly IMS - IP Multimedia Service Keeping up with upgrades 18

19 Summary Key ingredients in LTE All IP voice & data Streamlined architecture Improved antennas Spectrally efficient air interface Costly upgrades at base stations Reallocating spectrum 19

20 Contact Information Annabel Z. Dodd Available in hard copy and electronically from all major book sellers including Amazon and itunes. Bulk purchases arranged on request 20

21 Free Upcoming Webinar Vectoring Demystified Thursday, January 24, 2013 at 1:00 PM (ET) Sponsored by ADTRAN

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