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Slide title In CAPITALS 50 pt Slide subtitle 32 pt Naren Mohan Layer 3 Messaging and Call Procedures.

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Presentation on theme: "Slide title In CAPITALS 50 pt Slide subtitle 32 pt Naren Mohan Layer 3 Messaging and Call Procedures."— Presentation transcript:

1 Slide title In CAPITALS 50 pt Slide subtitle 32 pt Naren Mohan Layer 3 Messaging and Call Procedures

2 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Agenda Protocol Layers & Signaling Radio Network Procedures Example Call Flows KPI Calculation Triggers

3 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Channels  Logical Channels – Defines what information to be transferred  Transport Channels – Defines how data should be transferred.  Physical Channels – Carry the data

4 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Protocol Layers L2/MAC L1 L2/RLC L3/RRC UTRANUE RRC RLC MAC PHY RRC MAC PHY RLC Signaling Radio Bearer Logical Channel Transport Channel Physical Channel CTRL USER DATA USER DATA

5 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Layer 3 Signaling  The Control Signaling is used for troubleshooting the problems. These messages are carried in the Logical Control Channels such as DCCH, CCCH, BCCH.  Radio Resource Control (RRC) Protocol messages contain the necessary control information and the commands – Obtained from TEMS.  In the Iub we may be interested in the NBAP and RANAP protocol messages – Obtained from UETR. PHY RLC/MAC RRC MMGMM CCSM PHY RLC/MAC RRC Sig. Bearer SCCP RANAP UEWRAN Sig. Bearer SCCP RANAP MMGMM CCSM MSC/VLR or SGSN

6 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) RRC Protocol Functions  Carries most of the Control Signaling between the UE and the UTRAN.  Carries all the information required to setup, modify and release lower layer entities.  RRC Controls –Radio Bearer parameters such as RLC Timers, QoS –Transport channel parameters such as the Transport format Combination (TFC) –Physical Channel parameters such as Code usage, carrier frequency  Radio Resource Supervision

7 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) RRC Connected Mode RRC States CELL_PC H CELL_FAC H IDLE MODE CELL_DCH RRC Connection Establishment RRC Connection Release RRC Connection Establishment Radio Bearer Reconfiguration

8 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Layer 3 Procedures  RRC Setup and RRC release  Measurement Reports  Active Set Update  Radio Bearer Setup and Reconfiguration  Transport Channel Reconfiguration  Physical Channel Reconfiguration  All Call setup and tear down messages (such as PDP Activation/Deactivation, Alerting/Release etc) - These are Call Control and Session Management messages.

9 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) System Information Blocks (BCH)  RRC Protocol Schedules the SIBs.  The system information blocks are arranged as a tree structure. The Master Info. Block (MIB) contains the reference and scheduling info for the SIBs.  UE receives SIBs in Idle or CELL_FACH modes MIB SIB 1SIB 3SIB 5 SIB n SIB n.1SIB n.2 SIB 7SIB 11 LA/ RA Updating,Paging, idlemode timersCRS ParametersCell / Common Ch.ConfigurationPower Control onCommon ChannelsMeasurementManagement

10 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Measurement Procedures Remember !!! – Unlike GSM, the measurement reports event triggered. You can see long times of silence from the UE. These are not to be confused as missing messages. UERNC RRC: Measurement Report (DCCH) RRC: Measurement Control (BCCH/DCCH) UE Measures the SCs and performs Evaluation for Event Trigger Criteria. RRC: Active Set Update (DCCH) RNC Evaluates based on the measurements and Network Configuration.

11 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) RRC Connection Establishment  Cause codes will indicate the problem if RRC Connection is rejected UERNC RRC: RRC Connection Request (CCCH) RRC: RRC Connection Setup (CCCH) RRC: RRC Connection Setup Complete (DCCH) Cause Code for connection Request Sent: Originating Streaming Call Originating Interactive Call Originating Background Call Terminating Conversational Call Terminating Streaming Call Terminating Interactive Call Terminating Background Call Emergency Call Registration Originating High Priority Signalling Call re-establishment Terminating High Priority Signalling Terminating cause unknown Contains the UE Capability (HS or R99) RRC Connection can be rejected to Admission & Congestion Control Features

12 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) RRC Connection Establishment T >T300 UE starts timer T=0, counter N=1 UE sends RRC Connection Request UE increments Timer T UE gets RRC Connection Setup UE sends RRC Connection Setup Complete N = N + 1 T=0 N > N300 Fail. UE goes into idle mode UE gets RRC Connection Reject Cause = “Wait’ Wait for ‘wait’ seconds N = N + 1 T=0 UE sends RRC Connection Request N N N Y Y Y YY N N RRC Procedure Successful

13 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Radio Bearer Setup  RAB (Radio Access Bearer) is setup between Core and UE.  Radio Bearer is setup between UE and UTRAN to support the RAB. UE RNC RRC: Radio Bearer Setup (DCCH) RRC: Radio Bearer Setup Complete (DCCH) CN RANAP: Radio Access Bearer Request RANAP: Radio Access Bearer Response (DCCH)

14 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Active Set Update  UTRAN sends Active Set Update to the UE in CELL_DCH mode.  The result could be one of the following –Radio Link Addition –Radio Link Removal –Radio Link Replacement (Combined Addition/Removal) UE RNC RRC: Measurement Report (e1a, e1b, e1c) (DCCH) RRC: Active Set Update (DCCH) RRC: Active Set Update Complete (DCCH) Timeout of 5 s

15 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Radio Bearer Reconfiguration  RB Reconfiguration occurs for the following scenarios –Channel Type Switch i.e., DCH to FACH, FACH to DCH –Reconfiguration of the Radio Bearer after RB Setup (such as RLC timer reconfiguration) UE RNC RRC: Radio Bearer Reconfiguration (DCCH) RRC: Radio Bearer Reconfiguration Complete (DCCH) FACH/DCH DCH/FACH

16 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Transport Channel Reconfiguration  Transport Channel Reconfiguration procedure triggers the Channel Rate Switching. 64K 128K 384K UE RNC RRC: Transport Channel Reconfiguration (DCCH) RRC: Transport Channel Reconfiguration Complete (DCCH)

17 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Physical Channel Reconfiguration  Physical channel reconfiguration procedure is used to establish, reconfigure and release physical channels.  Used to enter Compressed mode before IRAT, HSDPA Cell Change UE RNC RRC: Physical Channel Reconfiguration (DCCH) RRC: Physical Channel Reconfiguration Complete (DCCH)

18 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) RRC Connection Release  When the RRC Connection is released, the UE will be in IDLE mode. Radio Bearers will be released.  RRC Connection can be released abnormally if UE RNC RRC: RRC Connection Release (DCCH / CCCH) RRC: RRC Connection Release Complete (CCCH) RRC: RRC Connection Abnormal Release (DCCH / CCCH)

19 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Example Voice Call Flow (MOC) UE RNC RRC: RRC Connection Request (CCCH) RRC: RRC Connection Setup (CCCH) RRC: RRC Connection Setup Complete (DCCH) RRC: Initial Direct Transfer - CM Service Request (DCCH) RRC: Downlink Direct Transfer – Auth & Ciph Request (DCCH) RRC: Uplink Direct Transfer - Auth & Ciph Response (DCCH) RRC: Security Mode Command (DCCH) RRC: Security Mode Complete (DCCH) RRC: Uplink Direct Transfer - SETUP (DCCH) RRC: Downlink Direct Transfer – CALL PROCEEDING (DCCH) RRC: Radio Bearer Setup (DCCH) RRC: Downlink Direct Transfer – ALERTING (DCCH) RRC: Radio Bearer Setup Complete (DCCH) RRC: Downlink Direct Transfer - CONNECT (DCCH) RRC: Downlink Direct Transfer – CONNECT ACK (DCCH) RRC: Measurement Control (DCCH) RRC: Measurement Report (DCCH) Call Setup Phase KPIs: Call Setup Success Rate Call Setup Time RRC: Uplink Direct Transfer - DISCONNECT (DCCH) RRC: Direct Transfer - Release (DCCH) RRC: Uplink Direct Transfer – Release Complete (DCCH) Total Call Time KPIs: Dropped Call RRC Connection is released after the Call Release.

20 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Example PS R99 Call Flow UE RNC RRC: RRC Connection Request (CCCH) RRC: RRC Connection Setup (CCCH) RRC: RRC Connection Setup Complete (DCCH) RRC: Initial Direct Transfer - CM Service Request (DCCH) RRC: Downlink Direct Transfer – Auth & Ciph Request (DCCH) RRC: Uplink Direct Transfer - Auth & Ciph Response (DCCH) RRC: Security Mode Command (DCCH) RRC: Security Mode Complete (DCCH) RRC: Uplink Direct Transfer – SM ACTIVATE PDP CONTEXT REQUEST (DCCH) RRC: Radio Bearer Setup (DCCH) RRC: Downlink Direct Transfer – SM ACTIVATE PDP CONTEXT ACCEPT (DCCH) RRC: Radio Bearer Setup Complete (DCCH) RRC: Measurement Control (DCCH) RRC: Measurement Report (DCCH) RRC: Uplink Direct Transfer – SM Deactivate PDP Context Request (DCCH) RRC: Direct Transfer – SM Deactivate PDP Context Accept (DCCH) RRC: RRC Connection Release (DCCH) Call Setup Phase KPIs: Call Setup Success Rate Call Setup Time Total Call Time KPIs: Dropped Call RRC: Transport Channel Reconfiguration (DCCH) RRC: Transport Channel Reconfiguration Complete (DCCH) Channel Switching

21 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Example HSDPA Call Flow UE RNC RRC: RRC Connection Request (CCCH) RRC: RRC Connection Setup (CCCH) RRC: RRC Connection Setup Complete (DCCH) RRC: Uplink Direct Transfer – SM ACTIVATE PDP CONTEXT REQUEST (DCCH) RRC: Downlink Direct Transfer – SM ACTIVATE PDP CONTEXT ACCEPT (DCCH) RRC: Measurement Report (e1a) (DCCH) RRC: Active Set Update (DCCH) RRC: Active Set Update Complete (DCCH) RRC: Physical Channel Reconfiguration (DCCH) RRC: Physical Channel Reconfiguration Complete (DCCH) E1A: Radio Link Addition Not a HS Cell Change. Here the procedure is to realign the parameters. RRC: Measurement Report (e1d) (DCCH) RRC: Active Set Update (DCCH) RRC: Active Set Update Complete (DCCH) RRC: Physical Channel Reconfiguration (DCCH) RRC: Physical Channel Reconfiguration Complete (DCCH) E1D: Change of Best Server HS Cell Change KPI HS Cell Change Success Rate HS Cell Change time KPI Call Setup Success Rate Call Setup Time

22 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Example IRAT Handover (PS) UE RNC RRC: Uplink Direct Transfer – SM ACTIVATE PDP CONTEXT REQUEST (DCCH) RRC: Radio Bearer Setup (DCCH) RRC: Downlink Direct Transfer – SM ACTIVATE PDP CONTEXT ACCEPT (DCCH) RRC: Radio Bearer Setup Complete (DCCH) RRC: Measurement Control (DCCH) RRC: Measurement Report (e1b) (DCCH) RRC: Transport Channel Reconfiguration (DCCH) RRC: Transport Channel Reconfiguration Complete (DCCH) RRC: Active Set Update (DCCH) RRC: Active Set Update Complete (DCCH) RRC: Transport Channel Reconfiguration (DCCH) RRC: Transport Channel Reconfiguration Complete (DCCH) RRC: Measurement Report (e3a) (DCCH) RRC: Measurement Report (e2d) (DCCH) RRC: Physical Channel Reconfiguration (DCCH) RRC: Physical Channel Reconfiguration Complete (DCCH) RRC: Cell Change Order From UTRAN (DCCH) UE Enters Compressed Mode, Starts measuring in GSM Handover to GSM. UE performs RA update in GSM RRC: Handover From UTRAN (DCCH) Handover to GSM. Handover Complete message in GSM indicates successful Handover RRC: Downlink Direct Transfer – Connect (DCCH) RRC: Uplink Direct Transfer – SM Alerting (DCCH) RRC: Measurement Control (DCCH)

23 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) CS IRAT Handover (Core Perspective) UE RNC MSC/ MGW BSC RANAP: Relocation Required RRC: Measurement Report (e3a) (DCCH) BSSMAP: Handover Request BSSMAP: Handover Request Ack RANAP: Relocation Command RRC: Handover from UTRAN RR: Handover Access RR: Handover Complete RANAP: Iu Release Command RANAP: Iu Release Complete Timer: T_RELOC_Prep

24 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Example HSDPA/FACH Iur Handover UE RNC RRC: Uplink Direct Transfer – SM ACTIVATE PDP CONTEXT REQUEST (DCCH) RRC: Downlink Direct Transfer – SM ACTIVATE PDP CONTEXT ACCEPT (DCCH) RRC: Measurement Report (e1a) (DCCH) RRC: Active Set Update (DCCH) RRC: Active Set Update Complete (DCCH) RRC: Physical Channel Reconfiguration (DCCH) RRC: Physical Channel Reconfiguration Complete (DCCH) RRC: RRC Connection Release (DCCH) RRC: RRC Connection Request (CCCH) RRC: RRC Connection Setup (CCCH) RRC: RRC Connection Setup Complete (DCCH) RRC: Radio Bearer Setup (DCCH) RRC: Radio Bearer Setup Complete (DCCH) RRC Establishment Cause Code: “Call Re- Establishment” Or “Directed Signalling Re-establishment” RRC: Radio Bearer Reconfiguration (DCCH) RRC: Radio Bearer Reconfiguration Complete (DCCH) RRC: Cell Update (CCCH) UE does Channel Type Switch to CELL_FACH

25 Slide title In CAPITALS 50 pt Slide subtitle 32 pt Some Abnormal Cases

26 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) Abnormal Drop Case UETR TEMS LOGS from UE

27 Slide title In CAPITALS 50 pt Slide subtitle 32 pt KPI Definitions

28 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) KPI Definition – CS Drop RRC Connection Request RRC Connection Setup Complete Alerting Connect Event = Dropped Call Dedicated Mode To Idle Mode RRC Connection Abnormal Release AMR Total Call Duration Disconnect CS Dropped Call Rate (Long Call) = Effective Calls = Total Call Duration / 90 sec (MHT)

29 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) KPI Definition – PS Drop Packet Call RRC Connection Request RRC Connection Setup Complete Activate PDP Context Accept Session Start (TEMS Internal) Session End/Error (TEMS Internal) RRC Connection Request /RRC Connection Setup Complete Deactivate PDP Context Req/Accept RRC Connection Request /RRC Connection Setup Complete Total Call Duration PS Drop Rate (Long Calls) = Effective Calls = Total Call Duration / 60 sec (MHT)

30 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) KPI Definition – Call Setup Success RRC Connection Request RRC Connection Setup Complete Alerting RRC Connection Reject No Alerting Or Connect RRC Connection Request Exceeds N300 AMR If total time between RRC Connection Request And Connect Exceeds 50 Seconds (setup timeout) = Access Failure RRC Connection Request RRC Connection Setup Complete Activate PDP Context Accept RRC Connection Reject No Activate PDP Context Accept /Session Start RRC Connection Request Exceeds N300 Packet Call If total time between RRC Connection Request And Session Start Exceeds 50 Seconds (setup timeout) = Access Failure

31 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) KPI Definition - Throughput Activate PDP Context Accept Session Start (TEMS Internal) Session End/Error (TEMS Internal) RRC Connection Request /RRC Connection Setup Complete Deactivate PDP Context Req/Accept Session Start (TEMS Internal) Session End/Error (TEMS Internal) Session Duration

32 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34) KPI Definition - IRAT GSMUMTS Handover Command Inter System To Utran Handover Access Handover Complete Measurement Report GSM/GPRS UMTS Cell Change Order from UTRAN Command Routing Area Update Request Routing Area Update Accept Measurement Report UMTS To GSM PS Handover UMTS To GSM CS Handover

33 Top right corner for field-mark, customer or partner logotypes. See Best practice for example. Slide title 40 pt Slide subtitle 24 pt Text 24 pt Bullets level pt Ericsson ConfidentialNaren Mohan (34)


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