LTE Counters and KPI [RL50] [RL50] RA4133-50A RAB and NAS counters Module 5
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Document change history
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Course Objectives RAB and NAS counters
After completing this learning element, the participant should be able to: Describe the LTE bearer concept (E-RAB, EPS bearer, S1 and S5/S8 bearer)
Explain in detail the signaling for bearer setup and the corresponding counters Discuss possibilities for investigations by using existing
LTE interface S1
• Listing of release counters and their meaning • Identify Counters for QCI
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LTE RAB and NAS Counters • • • • • •
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LTE Bearer Concept Bearer Smart Admin Control S1 and X2 Setup LTE Bearer Release QCI Counters
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LTE Bearers
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LTE Bearers Bearer counters M8006 – EPS Bearer measurement setups attempts, setup completions, releases, for QCI1,2,3,4, non GBR Pre emption for GBR and Non GBR Activity time for GBR and Non GBR M8007 – Radio Bearer DRB setup attempts, completions,, failures, releases SRB1 and SRB2 setups, completions and failures
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LTE RAB and NAS Counters • • • • • • •
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LTE Bearer Concept Bearer Setup Smart Admin Control S1 Setup X2 Setup LTE Bearer Release QCI Counters
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Attach Procedure (Positive)
UE
eNB
MME
SGW
PGW
HSS
Random Access procedure RRCConnectionSetupComplete (EMM: Attach Request, ESM: PDN Connectivity Request)
IntialUEMessage (EMM: Attach Request, ESM: PDN Connectivity Request)
ME identity check procedure
ME identity check procedure
Authentication / Security
Authentication / Security Location updating CreateSessionRequest
7.Session creation CreateSessionRensponse
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EIR
Attach Procedure (Positive) UE
eNB
MME
InitialContextSetupRequest
SGW
PGW
HSS
•M8000C0 Initial context setup requests •M8006C0 EPS bearer setup attempts
(EMM: Attach Accept, ESM: Activate Default EPS Bearer Context Request) M8007C0 Data RB setup attempts M8007C10: SRB2 setup attempts
RRCConnectionReconfiguration
(EMM: Attach Accept, ESM: Activate Default EPS Bearer Context Request ) M8007C1 Data RB setup completions M8007C11: SRB2 SETUP SUCC
RRCConnectionReconfigurationComplete InitialContextSetupResponse
M8000C1 Initial context setup completions M8006C1 EPS bearer setup completions
ULInformationTransfer
(EMM: Attach Complete, ESM: Activate Default EPS Bearer Context Complete) UplinkNASTransport (EMM: Attach Complete, ESM: Activate Default EPS Bearer Context Complete) First Uplink Data Modify Bearer Request
M8000 S1 AP Measurements: eNodeB level Modify Bearer Response M8006 EPS Bearer Measurements: cell level M8007 Radio Bearer Measurements: cell level
First Downlink Data 10
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Attach Procedure (Positive) UE
eNB
MME
SGW
PGW
•M8000C0 Initial context setup requests •M8006C0 EPS bearer setup attempts
InitialContextSetupRequest (EMM: Attach Accept, ESM: Activate Default EPS Bearer Context Request) M8007C0 Data RB setup attempts M8007C10: SRB2 setup attempts
RRCConnectionReconfiguration
(EMM: Attach Accept, ESM: Activate Default EPS Bearer Context Request ) M8007C1 Data RB setup completions RRCConnectionReconfigurationComplete M8007C11: SRB2 SETUP complete
InitialContextSetupResponse
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HSS
NAS Service Request (Negative)
UE
eNB
MME
SGW
PGW
InitialContextSetupFailure
M8000C9 S1 setup failure indicated by MME
M8000C8 S1 setup failure, no response from MME
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HSS
NAS Service Request (Negative)
UE
eNB
MME
SGW
PGW
InitialContextSetupRequest
RRCConnectionReconfiguration
Setup DRB TS1Relocexec/Tx2Relocexec expires RRCConnectionReconfigurationComplete
M8007C2 Data bearer setup failure
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HSS
NAS Service Request (Negative)
UE
eNB
MME
SGW
PGW
InitialContextSetupRequest
RRCConnectionReconfiguration
RRCConnectionReconfigurationComplete InitialContextSetupResponse (with failure cause)
M8006C2/C3/C4/C5
M8000C2/C3/C4/C5
EPS bearer setup failure due to
Initial context setup failure due to
• Radio network layer
• Radio network layer
• Transport layer
• Transport layer
• Resource reasons
• Resource reasons
• Other reasons 14
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HSS
Data Radio Bearer Setup Counter Summary
M8007C0
Data bearer setup attempts
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M8007C2
M8007C1
Data bearer setup failures / completions
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NAS Bearer Setup Counter Summary
M8000C2 M8006C2 M8000C0 M8006C0
Initial context & EPS bearer setup attempts
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M8000C1 M8007C1
Initial context & EPS bearer setup failures / completions
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failures due to Radio Network Layer
M8000C3 M8006C3
failures due to Transport Layer
M8000C4 M8006C4
failures due to Resource reasons
M8000C5 M8006C5
failures due to Other reasons
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DRB Setup KPIs LTE_5003a E-UTRAN Data Radio Bearer Setup Success Ratio Shows the setup success ratio for the data radio bearer setup procedure The elementary procedure "RRC connection reconfiguration" is used in this context to setup a user plane (data) radio bearer
Logical formula DRB SSR = (DRB setup successes / DRB setup attempts) * 100%
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Summarization formula (PI ID)
Summarization formula (Abbreviation)
100 * sum ([M8007C1]) / sum ([M8007C0])
100 * sum ([DATA_RB_STP_COMP]) / sum ([DATA_RB_STP_ATT])
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DRB Setup KPIs LTE_5117a E-UTRAN Radio Bearer Success Ratio The KPI shows the Radio Bearer Success Ratio given as 100% - Radio Bearer Drop Ratio.
Logical formula RB SR= 100 - RB DR
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Summarization formula (PI ID) RB SR= 100 (100*sum([M8007C5])+ ([M8007C6]) / sum([M8007C3]+ ([M8007C4]+ [M8007C5]+ [M8007C13]+ [M8007C6]))
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Summarization formula (Abbreviation) RB SR= 100 - LTE_5004
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Data Radio Bearer Setup KPIs
12,000
100.00
10,000 90.00
8,000 80.00 6,000 70.00 4,000
60.00
2,000
LTE_5116a Data Radio Bearer Attempts (#)
LTE_5117a Data Radio Bearer Success Ratio (%)
LTE_5003a Data Radio Bearer Setup Success Ratio (%) 19
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21.06.2011
19.06.2011
17.06.2011
15.06.2011
13.06.2011
11.06.2011
09.06.2011
06.06.2011
04.06.2011
02.06.2011
31.05.2011
29.05.2011
27.05.2011
25.05.2011
0 23.05.2011
50.00
E-RAB Setup KPIs LTE_5017a E-UTRAN E-RAB Setup Success Ratio Describes the setup success ratio of the elementary E-RAB setup procedure used to setup the E-RAB between MME and UE It indicates the E-UTRAN contribution to network accessibility for the end user, not the whole end-to-end service accessibility.
Logical formula E-RAB SSR = (E-RAB setup successes / ERAB setup attempts) * 100 %
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Summarization formula (PI ID)
Summarization formula (Abbreviation)
100 * sum ([M8006C1]) / sum ([M8006C0])
100 * sum ([EPS_BEARER_SETUP_COMPLETIONS]) / sum ([EPS_BEARER_SETUP_ATTEMPTS])
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E-RAB Setup KPIs 12,000 100.00
10,000 90.00
8,000 80.00 6,000 70.00 4,000
60.00
2,000
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21.06.2011
19.06.2011
17.06.2011
15.06.2011
13.06.2011
11.06.2011
09.06.2011
06.06.2011
04.06.2011
02.06.2011
31.05.2011
29.05.2011
27.05.2011
25.05.2011
0 23.05.2011
50.00
LTE_5118a E-RAB Setup Attempts (#)
LTE_5024a E-RAB Normal Release Ratio RAN View (%)
LTE_5017a E RAB Setup Success Ratio (%)
LTE_5023a E-RAB Normal Release Ratio User Perspective (%)
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E-RAB Setup KPIs LTE_5204a E-UTRAN E-RAB Setup Success Ratio, QCI1 The KPI describes the setup success ratio of the elementary E-RAB setup procedure used to setup the E-RAB between MME and UE for QCI1 DRBs. It indicates the E-UTRAN contribution to network accessibility for the end-user, not the whole end-to-end service accessibility.
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Logical formula
Summarization formula (PI ID)
Summarization formula (Abbreviation)
E-RAB SSR QCI1=(E-RAB setup successes QCI1 / ERAB setup attempts QCI1)*100%
100*sum([M8006C35] + [M8006C44]) / sum([M8006C17] + [M8006C26])
100*sum([EPS_BEARER_STP_COM_INI_QCI1] + [EPS_BEAR_SET_COM_ADDIT_QCI1]) / sum([EPS_BEARER_STP_ATT_INI_QCI_1] + [EPS_BEARER_STP_ATT_ADD_QCI_1])
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E-RAB Setup KPIs LTE_5553a E-UTRAN E-RAB Setup Success Ratio, QCI2 The KPI describes the setup success ratio of the elementary E-RAB setup procedure used to setup the E-RAB between MME and UE for QCI2 DRBs. It indicates the E-UTRAN contribution to network accessibility for the end-user, not the whole end-to-end service accessibility. In a similar manner LTE_5554a and LTE_5555a calculate success ratio for QCI 3 and 4 respectively
Logical formula
Summarization formula (PI ID)
Summarization formula (Abbreviation)
E-RAB SSR QCI2=(E-RAB setup successes QCI2 / ERAB setup attempts QCI2)*100%
100*sum([M8006C168] + [M8006C171]) / sum([M8006C162] + [M8006C165])
100*sum([EPS_BEARER_STP_COM_INI_QCI_2] + [EPS_BEAR_SET_COM_ADD_QCI_2]) / sum([EPS_BEARER_STP_ATT_INI_QCI_2] + [EPS_BEARER_STP_ATT_ADD_QCI_2])
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E-RAB Setup KPIs LTE_5217b E-UTRAN E-RAB Setup Success Ratio, non - GBR The KPI describes the setup success ratio of the elementary E-RAB setup procedure used to setup the E-RAB between MME and UE for non GBR services. It indicates the E-UTRAN contribution to network accessibility for the end-user, not the whole end-to-end service accessibility.
Logical formula E-RAB SSR non GBR=(E-RAB setup successes non GBR / E-RAB setup attempts non GBR)*100%
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Summarization formula (PI ID) 100*sum(([M8006C1] - ([M8006C35] + [M8006C44]) -([M8006C168] + [M8006C171]) - ([M8006C169] + [M8006C172]) - ([M8006C169] + [M8006C173])) / sum([M8006C0] ([M8006C17] + [M8006C26]) ([M8006C162] + [M8006C165]) ([M8006C163] + [M8006C166]) ([M8006C164] + [M8006C167])))
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Summarization formula (Abbreviation) 100*sum(EPS_BEARER_SETUP_COMPLETIONS] ([EPS_BEARER_STP_COM_INI_QCI1] +[EPS_BEAR_SET_COM_ADD_QCI1]) ([EPS_BEARER_STP_COM_INI_QCI_2] + [EPS_BEAR_SET_COM_ADD_QCI_2]) ([EPS_BEARER_STP_COM_INI_QCI_3] + [EPS_BEAR_SET_COM_ADD_QCI_3]) ([EPS_BEARER_STP_COM_INI_QCI_4] + [EPS_BEAR_SET_COM_ADD_QCI_4])) / sum([EPS_BEARER_SETUP_ATTEMPTS] - ([EPS_BEARER_STP_ATT_INI_QCI_1] + [EPS_BEARER_STP_ATT_ADD_QCI_1]) -([EPS_BEARER_STP_ATT_INI_QCI_2] + [EPS_BEARER_STP_ATT_ADD_QCI_2]) -([EPS_BEARER_STP_ATT_INI_QCI_3] + [EPS_BEARER_STP_ATT_ADD_QCI_3]) -([EPS_BEARER_STP_ATT_INI_QCI_4] + [EPS_BEARER_STP_ATT_ADD_QCI_4]))
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NAS Bearer Setup KPIs Call Setup Success Ratio = RRC setup success ratio * RAB setup success ratio (like for WCDMA) CSSR (Call Setup Success Rate) eRAB Setup Attempts
CSSR [%]
1400
100
1200
90 80
1000
70 60
800
50 % 600
40 30
400
20 10
200 06.11.2010
05.11.2010
04.11.2010
03.11.2010
02.11.2010
01.11.2010
31.10.2010
30.10.2010
29.10.2010
28.10.2010
27.10.2010
26.10.2010
25.10.2010
24.10.2010
23.10.2010
22.10.2010
21.10.2010
20.10.2010
19.10.2010
0 18.10.2010
0
LTE 800 20 days report 25
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LTE RAB and NAS Counters • • • • • • •
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LTE Bearer Concept Bearer Setup Smart Admin Control S1 Setup X2 Setup LTE Bearer Release QCI Counters
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Smart Admin Control and ARP RL40
Service management
- Smart Admission Control • Necessity when offering high bit rate services • Configuration of access control threshold per cell simplified for GBR traffic • RAC reacts on measurements and therefore is adapted in a dynamic way • Congestion control function allows more optimistic admission decisions, and the system corrects overbooking situations using preemption according to priorities (Radio)
- ARP based admission Control • Prioritize the availability of different services - Lower availability services may be offered without jeopardizing higher available services - ‘Must’ availability services like emergency sessions need no dedicated (reserved) resource • Dynamic adaptation of resources to actual need 27
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High RB requests with congestion control by using of priority and smart admissions Rejected UE requests due of too S-RAC high RB utilization Only for QCI 2-4 Descriptions / Objective: To admit or to reject the requests Not for VoIP for establishment of Radio Bearers (RB) on a cell basis Based on number of RRC connections and number of active users per cell w/s allocation and retention priority (ARP)
ARP = Allocation and retention/maintenance Priority ©2014 Nokia Solutions and Networks. All rights reserved.
Smart Admission Control (RL40)
- S-RAC only for GBR traffic to avoid congestion on ‘guaranteed’ resources - Counter based RAC will not work in case of serving high bit rate users Replaced by a measurement based function - S-RAC predicts load required/caused by each new GBR radio bearer • Reflecting requested transmission rates in UL/DL under given radio conditions • Considering existing GBR load
- S-RAC offers congestion handling when overbooking of resources is detected e.g. • Radio conditions of high bit rate users getting worse • Too optimistic admission was done • Bursting traffic cannot be served over time.
- Adaptation of Transport Admission Control various bit rates of QCI 2,3,4 bearers (without congestion handling, without partial admission)
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ARP Counters (RL40) • ARP concept •
•
•
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Each time an E-RAB needs to be established – some bearer combination, – radio resources – transport resources are required. Insufficient resources available – Other E-RABs may be preempted to steal their resources or – Request is rejected Controlled by an ARP parameter – Mandatory part of any E-RAB requested by EPC
M8006C174
Pre-empted GBR bearers
M8006C175
Pre-empted non-GBR bearers
M8013C28
Pre-empted UE contexts due to pre-emption of last non-GBR bearer
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LTE RAB and NAS Counters • • • • • • •
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LTE Bearer Concept Bearer Setup Smart Admin Control S1 Setup X2 Setup LTE Bearer Release QCI Counters
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S1 Setup Procedure
eNB
MME
M8000C6: S1 Setup attempt
S1AP: S1 SETUP REQUEST
eNB global ID, eNB name, supported TAs and Paging DRX configuration
SCTP: SACK M8000C7: S1 Setup complete
S1AP: S1 SETUP RESPONSE ServedGUMMEI, Relative MME capacity
SCTP: SACK
GUMMEI: Globally Unique MME Identity TA: Tracking Area DRX: Discontinue Reception
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S1 Setup Counter Summary
M8000C8 M8000C6
S1 setup attempts
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M8000C7
M8000C9
S1 setup failures / completions
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S1 Setup KPIs LTE_5014a E-UTRAN S1 Setup Success Ratio Shows the setup success ratio for the elementary procedure "S1 Setup“ When this procedure is finished S1 interface is operational and other S1 messages can be exchanged
Logical formula S1 SSR = (S1 setup successes / S1 setup attempts) * 100%
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Summarization formula (PI ID)
Summarization formula (Abbreviation)
100 * sum([M8000C7]) / sum ([M8000C6])
100 * sum ([S1_SETUP_SUCC]) / sum ([S1_SETUP_ATT])
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S1 initial context Setup Procedure
eNB M8000C0: Initial context Setup requests
MME
S1AP: S1 INITIAL CONTEXT SETUP REQUEST
SCTP: SACK M8000C1: Initial Context Setup completions
S1AP: S1 INITIAL CONTEXT SETUP RESPONSE
SCTP: SACK
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Context Setup KPIs LTE_5009a Initial Context Setup Success Ratio Shows the setup success ratio for the elementary procedure "Initial Context Setup", used to setup initial UE context in MME (UE associated logical S1 connection)
Logical formula S1 init Cont SSR = (initial context setup successes / initial context setup attempts) * 100%
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Summarization formula (PI ID)
Summarization formula (Abbreviation)
100 * sum ([M8000C1]) / sum ([M8000C0])
100 * sum ([INI_CONT_STP_COMP]) / sum ([INI_CONT_STP_REQ])
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LTE RAB and NAS Counters • • • • • • •
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LTE Bearer Concept Bearer Setup Smart Admin Control S1 Setup X2 Setup LTE Bearer Release QCI Counters
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LTE X2AP (8022) RL30 It provides measurements related to X2 Setup procedure. The counters are updated at the originating eNB site
eNB1 M8022C0: X2 setup attempt
X2 Setup Procedure: Positive X2AP: X2 SETUP REQUEST
X2AP: X2 SETUP RESPONSE
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eNB2
LTE X2AP (8022) It provides measurements related to X2 Setup procedure. The counters are updated at the originating eNB site
eNB1 M8022C0: X2 setup attempt
X2 Setup Procedure: Negative X2AP: X2 SETUP REQUEST
X2AP: X2 SETUP FAILURE M8022C1: X2 setup failure
message or expiration of Timer (wait for X2 SETUP RESPONSE) 3GPP TS 36.423
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eNB2
LTE RAB and NAS Counters • • • • • • •
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LTE Bearer Concept Bearer Setup Smart Admin Control S1 Setup X2 Setup LTE Bearer Release QCI Counters
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eNodeB Initiated Transition to ECM Idle UE
MME
eNB
UE in RRC -CONNECTED
S -GW
Detect user inactivity or other eNB trigger
S 1 AP : UE Context Release Request
S1 AP : UE Context Release Command
RRC : RRC Connection Release
S 1 AP : UE Context Release Complete
S 11 interaction to inform S- GW about connection release
L2 ACK
Set UE to RRC - IDLE
Release all UE related resources, remove UE context
Transition due to inactivity
Set UE to ECM -IDLE
InactivityTimer
UE consumes less battery power in idle mode
LNCEL, 10..65535 s, 30s
Less active UEs which network has to handle Fast going to inactivity has drawback of longer connection setup time (more transitions idle to connected) 40
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eNodeB Initiated Transition to ECM Idle (Positive) ECM_CONNECTED eNB
MME
eNodeB initiated EPS bearer release M8006C10 normal release (UE inactivity) M8006C15 radio network layer inter-RAT redirection
S1AP: UEContextReleaseRequest With cause
eNodeB initiated transition to ECM idle M8013C13 normal release
S1AP: UEContextReleaseCommand With cause
S1AP: UEContextReleaseComplete
ECM_IDLE
M8006 EPS Bearer Measurements: cell level M8007 Radio Bearer Measurements: cell level M8013 UE State Measurements: cell level
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Radio bearer release M8007C3 normal release
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EPC Initiated Transition to ECM Idle(Positive) ECM_CONNECTED eNB
MME
S1AP: UEContextReleaseRequest With cause
EPC initiated EPS bearer release M8006C6 normal release (UE initiated) M8006C7 detach (UE or MME initiated)
S1AP: UEContextReleaseCommand With cause EPC initiated transition to ECM idle M8013C9 normal release (UE initiated) S1AP: UEContextReleaseComplete
M8013C10 detach (UE or MME initiated)
ECM_IDLE
M8006 EPS Bearer Measurements: cell level M8007 Radio Bearer Measurements: cell level M8013 UE State Measurements: cell level
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Radio bearer release M8007C4 detach
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Transition to ECM Idle (Negative) ECM_CONNECTED eNodeB initiated EPS bearer release
eNB
MME
M8006C12 radio link failure M8006C14 transport network unavailable S1AP: UEContextReleaseRequest With cause
M8006C13 other failure eNodeB initiated transition to ECM idle
S1AP: UEContextReleaseCommand With cause
M8013C15 radio link failure M8013C16 other failure
S1AP: UEContextReleaseComplete
Radio bearer release M8007C5 radio link failure
ECM_IDLE
M8007C6 other failure
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Transition to ECM Idle (Negative)
ECM_CONNECTED MME
eNB
EPC initiated EPS bearer release M8006C8 radio network layer cause
M8006C9 other cause EPC initiated transition to ECM idle
S1AP: UEContextReleaseCommand With cause
M8013C11 radio network layer cause S1AP: UEContextReleaseComplete
M8013C12 other cause
ECM_IDLE
Radio bearer release M8007C5 radio network layer cause
M8007C6 other cause
44
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LTE Bearer Release Counter Summary
eNodeB initiated M8013C15/C16 EPC initiated M8013C11/C12
45
eNodeB initiated M8006C12/C13/C14
M8007C5/C6
M8007C3/C4
EPC initiated M8006C8/C9
eNodeB initiated M8013C13
eNodeB initiated M8006C10/C15
EPC initiated M8013C9/C10
EPC initiated M8006C6/C7
Transitions to ECM idle
EPS bearer releases
Always triggers EPS bearer release
Always triggers radio bearer release RA41335EN50GLA1
Radio bearer releases
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LTE Bearer Release KPIs LTE_5023d E-RAB Normal Release Ratio, user perspective Describes the ratio of normally released E-RABs from user perspective Corresponding to a connection completion ratio
Logical formula E-RAB NRR UP = (normal ERAB releases user perspective / all E-RAB releases) * 100%
Summarization formula (PI ID) 100*sum([M8006C6]+ [M8006C7]+ [M8006C15] + M8006C10] + [M8006C174] + [M8006C175]) / sum([M8006C6] + [M8006C7] + [M8006C8] + [M8006C9] + [M8006C15] + [M8006C10] + [M8006C12] +[M8006C14] + [M8006C13] + [M8006C174] + [M8006C175])
Now at RL40 includes Pre-empted bearer release in numerator and denominator 46
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Summarization formula (Abbreviation) 100*sum([EPC_EPS_BEARER_REL_REQ_NORM]+ [EPC_EPS_BEARER_REL_REQ_DETACH]+ [ENB_EPS_BEAR_REL_REQ_RNL_REDIR] + [ENB_EPS_BEARER_REL_REQ_NORM] + [PRE_EMPT_GBR_BEARER] + [PRE_EMPT_NON_GBR_BEARER]) / sum([EPC_EPS_BEARER_REL_REQ_NORM]+ [EPC_EPS_BEARER_REL_REQ_DETACH]+ [EPC_EPS_BEARER_REL_REQ_RNL]+ [EPC_EPS_BEARER_REL_REQ_OTH] + [ENB_EPSBEAR_REL_REQ_RNL_REDIR]+ [ENB_EPS_BEARER_REL_REQ_NORM] + [ENB_EPS_BEARER_REL_REQ_RNL]+ [ENB_EPS_BEARER_REL_REQ_TNL] + [PRE_EMPT_GBR_BEARER] + [PRE_EMPT_NON_GBR_BEARER])
©2014 Nokia Solutions and Networks. All rights reserved.
LTE Bearer Release KPIs LTE_5024d E-RAB Normal Release Ratio, RAN perspective
Also - Normal release for QCI1 LTE_5209a
Describes the ratio of normally released E-RABs from RAN perspective M80006C8/9 are included in RAN perspective,
Logical formula E-RAB NRR UP = (normal ERAB releases RAN perspective / all E-RAB releases) * 100%
Summarization formula (PI ID) 100*sum([M8006C10]+ [M8006C15] + [M8006C6]+ [M8006C7 ]+ [M8006C8]+ [M8006C9] + [M8006C174] + [M8006C175]) / sum([M8006C6] + [M8006C7] + [M8006C8] + [M8006C9] + [M8006C15 ]+ [M8006C10] + [M8006C12] + [M8006C14] + [M8006C13] + [M8006C174] + [M8006C175])
Now at RL40 includes Pre-empted bearer release in numerator and denominator
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RA41335EN50GLA1
Summarization formula (Abbreviation) 100*sum([ENB_EPS_BEARER_REL_REQ_NORM] + ENB_EPS_BEARER_REL_REQ_RNL_REDIR]+ [EPC_EPS_BEARER_REL_REQ_NORM]+ [EPC_EPS_BEARER_REL_REQ_DETACH]+ [EPC_EPS_BEARER_REL_REQ_RNL]+ [EPC_EPS_BEARER_REL_REQ_OTH] + [PRE_EMPT_GBR_BEARER] + [PRE_EMPT_NON_GBR_BEARER]) / sum([EPC_EPS_BEARER_REL_REQ_NORM]+ [EPC_EPS_BEARER_REL_REQ_DETACH]+ [EPC_EPS_BEARER_REL_REQ_RNL]+ [EPC_EPS_BEARER_REL_REQ_OTH] + [ENB_EPSBEAR_REL_REQ_RNL_REDIR]+ [ENB_EPS_BEARER_REL_REQ_NORM] + [ENB_EPS_BEARER_REL_REQ_RNL]+ [ENB_EPS_BEARER_REL_REQ_TNL] + [ENB_EPS_BEARER_REL_REQ_OTH]+ [PRE_EMPT_GBR_BEARER] + [PRE_EMPT_NON_GBR_BEARER])
©2014 Nokia Solutions and Networks. All rights reserved.
LTE Bearer Release KPIs
M8006C8/9 inlcuded in user drop view but not in RAN view
LTE_5119c E-RAB Drop Ratio, User View
Describes the ratio of abnormally released (dropped) E-RABs from user point of view
Each bearer of the "Bearer to be Released List" IE is counted User point of view means that as abnormal E-RAB drops both those ones initiated by eNB and EPC are counted
Logical formula E-RAB DR = (abnormal ERAB release requests, user perspective / all E-RAB releases) * 100%
Summarization formula (PI ID) 100*sum ([M8006C8]+ [M8006C9] + [M8006C12] + [M8006C14] + [M8006C13]) /sum ([M8006C6] + [M8006C7] + [M8006C8] + [M8006C9] + [M8006C15]+ [M8006C10] + [M8006C12] + [M8006C14] + [M8006C13] + [M8006C174] + [M8006C175])
Now at RL40 includes Pre-empted bearer release in denominator 48
RA41335EN50GLA1
Summarization formula (Abbreviation) 100*sum([EPC_EPS_BEARER_REL_REQ_RNL]+ [EPC_EPS_BEARER_REL_REQ_OTH] +[ENB_EPS_BEARER_REL_REQ_RNL] +[ENB_EPS_BEARER_REL_REQ_TNL]+ [ENB_EPS_BEARER_REL_REQ_OTH] ]) /sum ([EPC_EPS_BEARER_REL_REQ_NORM]+ [EPC_EPS_BEARER_REL_REQ_DETACH]+ [EPC_EPS_BEARER_REL_REQ_RNL]+ [EPC_EPS_BEARER_REL_REQ_OTH] +[ENB_EPSBEAR_REL_REQ_RNL_REDIR]+ [ENB_EPS_BEARER_REL_REQ_NORM] +[ENB_EPS_BEARER_REL_REQ_RNL]+ [ENB_EPS_BEARER_REL_REQ_TNL] +[ENB_EPS_BEARER_REL_REQ_OTH]+ [PRE_EMPT_GBR_BEARER] + [PRE_EMPT_NON_GBR_BEARER])
©2014 Nokia Solutions and Networks. All rights reserved.
LTE Bearer Release KPIs
Also – Drop ratio for QCI1 RAN view LTE_5572a
LTE_5025d E-RAB Drop Ratio, RAN View
Describes the ratio of abnormally released (dropped) E-RABs from RAN point of view Each bearer of the "Bearer to be Released List" IE is counted
RAN point of view means that as abnormal E-RAB drops only those ones initiated by eNB are counted
Logical formula E-RAB DR = (abnormal ERAB releases from RAN point of view / all E-RAB releases) * 100%
Summarization formula (PI ID) 100*sum([M8006C12]+ [M8006C14]+ [M8006C13])/sum ([M8006C6]+ [M8006C7]+ [M8006C8]+ [M8006C9] + [M8006C15]+ [M8006C10]+ [M8006C12] + [M8006C14]+ [M8006C13]+ [M8006C174] + [M8006C175])
Now at RL40 includes Pre-empted bearer release in denominator 49
RA41335EN50GLA1
Summarization formula (Abbreviation) 100*sum([ENB_EPS_BEARER_REL_REQ_RNL] +[ENB_EPS_BEARER_REL_REQ_TNL]+ [ENB_EPS_BEARER_REL_REQ_OTH])/sum ([EPC_EPS_BEARER_REL_REQ_NORM]+ [EPC_EPS_BEARER_REL_REQ_DETACH]+ [EPC_EPS_BEARER_REL_REQ_RNL] +[EPC_EPS_BEARER_REL_REQ_OTH] + [ENB_EPSBEAR_REL_REQ_RNL_REDIR] +[ENB_EPS_BEARER_REL_REQ_NORM] +[ENB_EPS_BEARER_REL_REQ_RNL]+ [ENB_EPS_BEARER_REL_REQ_TNL]+ [ENB_EPS_BEARER_REL_REQ_OTH]+ [PRE_EMPT_GBR_BEARER] + [PRE_EMPT_NON_GBR_BEARER])
©2014 Nokia Solutions and Networks. All rights reserved.
LTE Bearer Release KPIs
eRAB Drop Rate eRAB Drops
Bearer (E-RAB) Drop Rate [%]
800
100
700 80
600 500
60 %
400 40
300 200
20 100 06.11.2010
05.11.2010
04.11.2010
03.11.2010
02.11.2010
01.11.2010
31.10.2010
30.10.2010
29.10.2010
28.10.2010
27.10.2010
26.10.2010
25.10.2010
24.10.2010
23.10.2010
22.10.2010
21.10.2010
20.10.2010
19.10.2010
0 18.10.2010
0
LTE 800 20 days report
50
RA41335EN50GLA1
©2014 Nokia Solutions and Networks. All rights reserved.
LTE Bearer Release KPIs
LTE 800 24 hour report
51
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©2014 Nokia Solutions and Networks. All rights reserved.
LTE RAB and NAS Counters • • • • • •
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LTE Bearer Concept Bearer Setup Smart Admin Control S1 Setup X2 Setup QCI counters
RA41335EN50GLA1
©2014 Nokia Solutions and Networks. All rights reserved.
Operator Specific QCI (RL30) • In RL30 – up to 21 additional QCIs are defined • Only for non-GBR bearers • QCI range is 128…254 • For each QCI an additional counterGroup is defined
• •
counterGroup The counter group to which the QCI belongs LNBTS; 1..6;1; -
Examples of Counter Groups for the typical use cases: 1. Better user and service differentiation for non-GBR services for one operator: • Bronze users: QCI: 130, 131, 132, 133 Counter Group 1 • Silver users: QCI: 140, 141, 142, 143 Counter Group 2 • Gold users: QCI: 150, 151, 152, 153 Counter Group 3
- 2. RAN sharing (operators share eNodeB) to define a set of QCIs dedicated for each operator: • Operator A: QCI: 140, 141, 142, 143 Counter Group 1 • Operator B: QCI: 160, 161, 162, 163 Counter Group 2
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©2014 Nokia Solutions and Networks. All rights reserved.
LTE UE and Service Differentiation (8023) RL30 LTE UE and Service Differentiation (M8023) measures Operator specific UE and Service Differentiation items.
M8023C0..5 PDCP SDU data volume on eUu Interface UL for UEs assigned to QCI Counter Group 1..6 M8023C6 ..11 PDCP SDU data volume on eUu Interface DL for UEs assigned to QCI Counter Group 1..6 M8023C21..26 Average number of active UEs of QCI Counter Group 1..6
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RA41335EN50GLA1
©2014 Nokia Solutions and Networks. All rights reserved.
Thank You !
RA41335EN50GLA1
©2014 Nokia Solutions and Networks. All rights reserved.