LTE Protocols and Procedures - Additional Materials

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Here are some additional materials from LTE Protocols and Procedures course delivered in May 2012 in Warsaw, Poland.

To learn about the LTE Protocols and Procedures course, please follow the link:http://www.is-wirelesstraining.com/trainings

To learn more about LTE/LTE-Advanced course portfolio from IS-Wireless, please have look here: http://www.is-wirelesstraining.com/trainings

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LTE Protocols and Procedures - Additional Materials

  1. 1. LTE Protocols and Procedures Additional Materials
  2. 2. E-UTRAN and EPC Protocol Stacks End-to-End Control Plane 3GPP IETF Protocol Protocol Control Plane NAS NAS GTP-C GTP-C GTP-C GTP-C RRC RRC S1-AP S1-AP PDCP PDCP SCTP SCTP UDP UDP UDP UDP RLC RLC IP IP IP IP IP IP MAC MAC L2 L2 L2 L2 L2 L2 PHY PHY PHY PHY PHY PHY PHY PHY Uu S1-MME S11 S5/S8 MME SGW PGW eNBCopyright by IS-Wireless. All rights reserved. www.is-wireless.com
  3. 3. E-UTRAN and EPC Protocol Stacks End-to-End User Plane 3GPP IETF Protocol Protocol User Plane Application Application IP IP IP PDCP PDCP GTP-U GTP-U GTP-U GTP-U L2 L2 RLC UDP/IP UDP/IP UDP/IP UDP/IP RLC MAC MAC L2 L2 L2 L2 L1 L1 PHY PHY PHY PHY PHY PHY Uu S1-U S5 SGi SGW PGW App. Server eNBCopyright by IS-Wireless. All rights reserved. www.is-wireless.com
  4. 4. LTE Channel Architecture Radio Bearer Type to Logical Channel Mapping Common signalling Dedicated signalling Data – dedicated links SRB1 – Prior to security SRB0 SRB0 SRB0 SRB2 – after secrutity DRB DRB SRB2 Radio Bearers PDCP Ciphering and Integrity Ciphering and RoHC RLC ARQ BCCH PCCH CCCH DCCH MCCH MTCH DTCH Logical ChannelsCopyright by IS-Wireless. All rights reserved. www.is-wireless.com
  5. 5. E-UTRA Uplink Procedure Random Access (1/4) Random Access Preamble Time structure Guard CP Sequence eNB Interval 0.1ms 0.8ms 0.1ms Random Access Preamble To cover 1ms random access subframe Near/Medium/Far distance users 64 different preambles t tCopyright by IS-Wireless. All rights reserved. www.is-wireless.com
  6. 6. E-UTRA Uplink Procedure Random Access (2/4) Example of PRACH allocations UL frame 10ms eNB 6PRB BW Random Access Preamble 64 different preambles 1ms „PRACH opportunity” TF reserved resources Wider Channel BW  Possible more PRACH allocations PUCCH PUSCH 1 subframe t t can have maximum 1 PRACH opportunityCopyright by IS-Wireless. All rights reserved. www.is-wireless.com
  7. 7. Random Access Procedure Random Access (3/4) Rx Power Chosen Random Access Preamble Power Ramp Step RAP Match! eNB ……. Initial power Random Access Preamble t TTI 1 2 3 ≤Max Number of PRACH transmissions Number of Preamble Transmission Random Access Response Adjust timing 1. Random Access Preamble index 2. Cell RNTI 3. Little UL Grant t t 4. Timing adjustmentCopyright by IS-Wireless. All rights reserved. www.is-wireless.com
  8. 8. E-UTRA Uplink Procedure Random Access (4/4) eNB UE receives Random Access Response Random Access Preamble And sends the first RRC Message 1. Cell RNTI Random Access Response 2. Filling the given UL Grant Resources with „RRC Connection Request” Message 3. S-TMSI RRC Connection Request eNB responds in PDSCH with RRC Connection Setup „RRC Connection setup” 1. Sending back S-TMSI 2. Sending the configuration of lower layers t tCopyright by IS-Wireless. All rights reserved. www.is-wireless.com
  9. 9. LTE Data Flow Example EPS Bearer 1 packet n EPS Bearer 1 packet n+1 EPS Bearer 2 packet n IP IP IP Payload Payload Payload header header header Header Payload Payload Payload compression Ciphering PDCP PDCP PDCP PDCP SDU PDCP SDU PDCP SDU header header header PDCP RLC SDU RLC SDU RLC SDU Segmentation concatenation RLC RLC RLC header header header RLC Multiplexing MAC MAC MAC SDU MAC SDU header header MAC AMC Transport Block CRC Transport Block CRC PHYCopyright by IS-Wireless. All rights reserved. Variable sizes (one TB per TTI) www.is-wireless.com
  10. 10. EUTRAN and EPC Book References 1. ”3G evolution : HSPA and LTE for Mobile Broadband”, Erik Dahlman, Stefan Parkvall, Johan Sköld and Per Beming, Academic Press 2. “Evolved Packet System (EPS): The LTE and SAE Evolution of 3G UMTS”, Pierre Lescuyer, Thierry Lucidarme 3. ”LTE for UMTS, Evolution to LTE-Advanced, Second Edition”, Harri Holma, Antti Toskala, Wiley 4. “LTE - The UMTS Long Term Evolution: From Theory to Practice, 2nd Edition” Stefania Sesia, Issam Toufik, Matthew Baker, WileyCopyright by IS-Wireless. All rights reserved. www.is-wireless.com
  11. 11. Title Backup slidesCopyright by Innovative Solutions. All rights reserved.Copyright by IS-Wireless. All rights reserved. www.is-wireless.com
  12. 12. LTE/LTE-Advanced course portfolio List of IS-Wireless’ courses Title Contact Us: Email: info@is-wireless.com www.is-wireless.comCopyright by Innovative Solutions. All rights reserved.Copyright by IS-Wireless. All rights reserved. www.is-wireless.com

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