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- 1. LTE/EPC Overview eNB Hands-onTraining for Trial (RL15TD) 1 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview Nokia Siemens Networks Academy Legal notice Intellectual Property Rights All copyrights and intellectual property rights for Nokia Siemens Networks training documentation, product documentation and slide presentation material, all of which are forthwith known as Nokia Siemens Networks training material, are the exclusive property of Nokia Siemens Networks. Nokia Siemens Networks owns the rights to copying, modification, translation, adaptation or derivatives including any improvements or developments. Nokia Siemens Networks has the sole right to copy, distribute, amend, modify, develop, license, sublicense, sell, transfer and assign the Nokia Siemens Networks training material. Individuals can use the Nokia Siemens Networks training material for their own personal self-development only, those same individuals cannot subsequently pass on that same Intellectual Property to others without the prior written agreement of Nokia Siemens Networks. The Nokia Siemens Networks training material cannot be used outside of an agreed Nokia Siemens Networks training session for development of groups without the prior written agreement of Nokia Siemens Networks. 2 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 2. Content 4 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview History and Future of Wireless 1990 2000 2005 2010 mobility time HSPA LTE WCDMA/cdma2000 HIGH GSM/IS95 3G 3G Enhacements 3G Evolution AMPS 2G 1G WiMAX Family 802.16e 802.16e 802.16a/d 802.16a/d Mobile WiMAX Mobile WiMAX LOW Fixed WiMAX Fixed WiMAX WLAN Family 802.11 802.11a/b/g 802.11a/b/g 802.11n data rates < 200 kbps < 1 Mbps < 10 Mbps < 50 Mbps < 100 Mbps < 1 Gbps 5 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 3. NSN Network ArchitectureEvolution 3GPP Rel 6 / HSPA Internet Node B RNC SGSN GGSN 3GPP Rel 7 / HSPA SGSN GGSN Internet Node B RNC Direct tunnel 3GPP Rel 7 / Internet HSPA SGSN GGSN Internet Node B Direct tunnel (RNC Funct.) MME 3GPP Rel 8 / LTE SAE GW Internet Evolved Node B Direct tunnel 6 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview LTE/EPS Network Architecture Subsystems • LTE/EPS architecture is driven by the goal to optimize the system for packet data transfer. • No circuit switched components • New approach in the inter-connection between radio access network and core network (S1 interface) •The EPS architecture is made up of an IMS/PDN EPC (Packet Core Network, also referred as SAE) and an eUTRAN Radio Access Network (also referred as LTE) EPC •The EPC provides access to external packet IP networks and performs a number EPS of CN related functions (e.g. QoS, security, eUTRAN mobility and terminal context management) for idle (camped) and active terminals •The eUTRAN performs all radio interface related functions LTE-UE 7 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 4. Basic Network Architecture Control plane path User data path HSS S6a eNB MME PCRF IMS Rx+ X2 S1-MME S11 Gx SGi Uu Company S1-U S5/S8 intranet LTE-UE eNB SGW PGW SAE-GW Internet eUTRAN EPC 8 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview LTE/EPS Mobility Areas Two areas are defined for handling of mobility in LTE/EPS: 9 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 5. Tracking Areas Tracking Area HSS eNB 1 2 TAI1 TAI1 TAI1 MME TAI1 TAI1 TAI2 TAI2 eNB TAI2 TAI2 TAI2 TAI2 TAI2 TAI2 TAI3 3 TAI3 S-eNB TAI3 TAI3 MME TAI3 TAI3 TAI3 Cell Identity 10 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview LTE Mobility & Connection States 11 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 6. LTE/EPS Bearer: Identity& Architecture •An EPS bearer identity uniquely identifies an EPS bearer for one UE. The EPS Bearer Identity is allocated by the MME. •LTE/EPS Bearer spans the complete network, from UE over EUTRAN and EPC up to the connector of the external PDN. •The SAE bearer is associated with a quality of service (QoS) usually expressed by a label or QoS Class Identifier (QCI) LTE-Uu S1-U S5/S8 SGi LTE-UE eNB Serving PDN Gateway Gateway cell PDN End-to-End Service EPS Bearer External Bearer Radio Bearer S1 Bearer S5/S8 Bearer E-UTRAN EPC PDN 12 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview The Default Bearer Concept •Each UE that is attached to the LTE network has at least one bearer available, that is called the default bearer. •Its goal is to provide continuous IP connectivity towards the EPC (“always- on” concept) •From the QoS point of view, the default bearer is normally a quite basic bearer •If an specific service requires more stringent QoS attributes, then a dedicated bearer should be established. MME S1-MME UE eNB S11 PDN S5 Gateway S1-U Sgi cell PDN Serving Gateway Default EPS Bearer 13 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 7. EPS Bearer QoSAttributes Default Bearer/Dedicated Bearer GBR/N-GBR MBR EPS Bearer QoS Parameters (To be defined per Bearer) UL/DL-TFT QCI ARP EPS Bearer QoS Parameters (To be defined per User) AMBR 14 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview QoS Class Identifier (QCI) Table in 3GPP Priori QCI Guarantee Delay budget Loss rate Application ty 1 GBR 2 100 ms 1e-2 VoIP 2 GBR 4 150 ms 1e-3 Video call 3 GBR 5 300 ms 1e-6 Streaming 4 GBR 3 50 ms 1e-3 Real time gaming 5 Non-GBR 1 100 ms 1e-6 IMS signalling 6 Non-GBR 7 100 ms 1e-3 Interactive gaming 7 Non-GBR 6 300 ms 1e-6 TCP protocols : 8 Non-GBR 8 300 ms 1e-6 browsing, email, file download 9 Non-GBR 9 300 ms 1e-6 15 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 8. EMM & ECMStates Transitions Power On Release due to Registration (Attach) Inactivity • Allocate C-RNTI, S_TMSI • Release RRC connection • Allocate IP addresses • Release C-RNTI • Authentication • Configure DRX for paging • Establish security context EMM_Deregistered EMM_Registered EMM_Registered ECM_Idle ECM_Connected ECM_Idle Deregistration (Detach) New Traffic Change PLMN •Establish RRC Connection • Release C-RNTI, S-TMSI •Allocate C-RNTI • Release IP addresses Timeout of Periodic TA Update • Release S-TMSI • Release IP addresses 16 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview E-UTRAN Functionalities 3GPP TS 36.401 LTE-UE LTE-Uu Evolved Node B cell (eNB) 17 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 9. NSN LTE /EPC Portfolio 18 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview Flexi Multiradio BTS LTE Remote RF Head Solution for RL15TD: • System module Antenna • RRH for RF function, one per sector/cell • Feederless & distributed Remote RF Module GPS Receiver OBSAI RP3-01 optical System Module 19 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 10. FlexiBTS Product Differencesbetween FDD&TDD FDD/RL25TD: RF Module Solution TDD: Remote Radio Head Solution Near the System Module Near the Antenna (RL05/15) Antenna Antenna Remote Radio Head 2 Path or GPS Receiver RF feeder 8 path (beamforming) GPS Receiver OBSAI RP3-01 optical RF Module Transport Block FCMD FSPC BB card FSPC BB card FSPC BB card System Module System Module 20 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview Flexi Network Server 21 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview
- 11. Flexi Network Gateway 22 © Nokia Siemens Networks RA4155-02A RL15TD eNB HOT – LTE/EPC overview