E2 e+call+setup+time+(cst)+enhacenments p3_benchmarking

Call Setup time
Reduction
how to Win the
benchmark race

ETXRAMON Raimundo Garcia Fernandez | Commercial in confidence | 1/154 43-12034 Uen, Rev PC1 | 2018-02-13 | Page 2
Content
› Background
› Purpose and scope
› Measurement methods
› Guidance and implementation conditions
› WCDMA RAN enhancement
› LTE RAN enhancements
› EPC enhancements
› IMS enhancements
› MSS enhancements
› UDC enhancements

Background
› Independent operator benchmark comparisons – a growing trend!
– P3 Connect tests in more than 45 countries
– Detailed voice and data specific KPIs
– Operator ratings publicly available after tests
› Used in marketing by the winning operator
› Important to win for protecting price levels and avoiding churn
– Not easy to charge more than competitors if lower rating
› No silver bullet
– Many different features and parameters to consider
› Every millisecond counts!

Purpose and Scope
› This document contains suggested enhancements for reducing
call setup time (CST) for benchmarks tests such as P3 Connect
› The content shall not be used for solution and product
acceptance criteria
– For solution and product criteria use: Acceptance Criteria Guidelines for
Service Performance of Multimedia Telephony over Mobile access
› All enhancements are described with pros and cons as well as
dependencies when applicable
› All enhancements do not fit all networks and in all situations. It’s
importance that each operator judge which enhancement fits in
their network.

benchmark measurement
methods
1. The first method relies on logs from the originating mobile that
indicates the time between pressing the send button on the
handset until the time for reception of the ringback tone
2. The second method calculates the time from call initiation to
answer indication received in the originating UE, minus the
answering time of the terminating user. The latter is defined as
the time between ‘The terminating UE sends Ringing’ and
‘The terminating UE sends Answering’. The signals
corresponding to the answering time have been measured in
the terminating handset.

P3’s definition of CST

This guide proposes a number of enhancements that help to reduce
Call Setup Time (CST) in mobile networks
For each proposed enhancement risks and impacts are described
and should be assessed for each customer
The primary focus is to improve CST without jeopardizing
network performance
The enhancements are not listed in any order of priority
Depending on customers’ conditions and requirements, local teams has
to decide which enhancements are applicable and their priority order
Guidance and implementation
conditions
The CST measurements method must be considered in the analysis when
deciding on which enhancements to use

WCDMA RAN Enhancements
Legacy Cs voice
List of Enhancements Impacted Domains/Nodes
UE 3G RAN 4G RAN EPC IMS MSS UDM
SRB on HS with PS bearers X
Direct Upswitch Speech X
CS Priority at CS Fallback X
RIM + enhancement W17.Q3 X X X
DMCR X
CSFB + PSHO X X X
Existing System Improvements X
Configuration options X

SRB on HSDPA with PS RAb
› Description
– Speech call setup for legacy voice using SRB on HSDPA; States: URA_PCH (Direct upswitch),
CELL_FACH (Direct upswitch), CELL_DCH, CSFB+PSHO from LTE Idle and LTE Connected
– Recommended parameter setting: cfnOffsetMarginSrbHs =75
› Pros
– Reduced CST through faster DL signaling when a PS RAB is present, gain depending on
scenario
– Network resource optimization
› Cons
– Small increase in PS drop rate may be seen
– Currently a fixed additional delay for the Speech RAB Setup (~750 ms) is needed for robustness
› Dependencies
– If fixed delay of 750 ms is used, require MSC sequence for Parallel RR Assignment and/or Early Alerting
› Reference
– Feature Description, SRB on HSDPA

› Description
– Call setup for legacy voice; Performs an upswitch directly to PS Int EUL/HS with SRB on HSDPA at trigger to
setup speech call from URA. States: URA_PCH
› Pros:
– Reduces the CST (up to 1.2s e2e) by up-switching to EUL/HS with SRB on HS for fast signaling
› Cons
– Currently a fixed delay for the Speech RAB Setup (~750 ms) is needed for robustness
› Dependencies
– WCDMA RAN Value Package, Smartphone Efficiency
– Requires ”SRB on HSDPA with PS RABs”
– If fixed delay of 750 ms is used, require MSC sequence for Parallel RR Assignment and/or Early
Alerting to achieve gain
› Reference
– Feature Description, Direct Upswitch for Speech
Direct Upswitch Speech

CS Priority at CS Fallback
› Description
– Delays the PS domain until the speech call is established when call is setup
from Idle. Typical scenario is CSFB + RwR, but will also handle legacy speech
setup in 3G if PS activity is encountered during the setup phase.
› Pros
– Reduces CST with up to 1.8s end-to-end
› Cons
– May increase the PS data interruption
› Dependencies
– WCDMA RAN Value Package, Traffic Management CS Fallback VP
› Reference
– Feature Description, CS Priority at CS Fallback from LTE

RIM + enhancement W17.Q3
› Description
– Speech call setup for legacy voice; States: CSFB+RwR from LTE Idle and LTE Connected
– Allows the UE to skip reading the WCDMA System Information by sending that to LTE. With the
enhancement SIB11/12 are not included, which allows more cells to be included at release or a
reduction of the LTE RRC Connection Release message
– Parameter: RncFunction::spareA[9] = 1
› Pros:
– Reduces CST up to 2.4s e2e
› Cons
– n/a
› Dependencies
– Support also required in SGSN-MME and LTE RAN
› Reference
– Feature Description, RIM Support for SI Transfer to LTE

DMCR W12B
› Description
– Allows the UE to skip reading WCDMA System Information SIB11/12 during Speech call setup for
legacy voice; States: Idle, CSFB+RwR from LTE Idle and LTE Connected
– Parameter: UtranCell::dmcrEnabled
› Pros
– Reduced CST with up to ~2s e2e,
› Cons
– Information to perform SoHO is slightly delayed to after the RRC connection has been setup, in
general not a problem but theoretically this could cause a drop
› Dependencies
– UE must support DMCR
› Reference
– Feature Description, CS Voice Fallback from LTE

CSFB + PSHO
› Description
– Speech call setup for legacy voice by performing a PSHO from LTE to WCDMA when speech call
setup is triggered; States: CSFB+PSHO from LTE Idle and LTE Connected
› Pros
– Reduced CST with up to 2.8s e2e
› Cons
– Currently delays CST for UEs not supporting F-DPCH
› Dependencies
– Requires ”SRB on HSDPA with PS RABs”
– If fixed delay of 750ms is used, require MSC sequence for Parallel RR Assignment and/or Early
Alerting to achieve gain
– UE must support F-DPCH
– Support also required in SGSN/MME and LTE RAN
› Reference
– Feature Description, CS Fallback based on PS Handover

SYSTEM Improvements
› Description
1. Dynamic Measurement Control Delay Handling, W14B (default ON)
Allows to send all Measurement Control messages at once
2. Optimized RRC Message for MRAB, W15A (default ON)
Reduces the message size for mRAB at setup/release/channel switching when speech is already
established, which allows to reduce the cfnOffsetMarginal for all configurations
3. Prioritized CS setup during PS inactivity, W16B (default ON)
Avoids downswitch due to inactivity
4. Improved setup time from DCH, W16B (configuration – change of existing parameters)
Reduce the time for reconfigurations by improving frame sync values for the PS bearer
– Speech call setup for legacy voice; 1 & 3 applicable to all scenarios at speech setup; 2 –for URA, FACH,
DCH and CSFB+PSHO for LTE Idle and LTE Connected; 4 – only for DCH and CSFB+PSHO for LTE
Idle and LTE Connected
› Pros:
– Reduced CST with a few 100 ms each
› Cons
– n/a
› Dependencies
– Reference: See NIR for respective release

Configuration OPTIONS
› Description
– Speech call setup for legacy voice; States: 1: Idle, CSFB+RwR from LTE Idle and
LTE Connected; 2: URA_PCH
– Parameters
1. RACH 10 ms TTI : Rach::spreadingFactor =32
2. DRX Cycle (URA) Paging:: utranDrxCycleLength = 5 (320 ms)
› Pros
– Reduces CST with a few hundred ms
› Cons
– n/a
› Dependencies
› Reference
– CPI Radio Network Parameters for latest release

LTE RAN Enhancements
List of Enhancements Impacted Domains
UE 3G
RAN
4G
RAN
EPC IMS MSS UDM
Redirect with System Information X X X
PSHO based CSFB X X X
LTE DRX for Idle (320ms) X
SI: CSFB+RwR – signaling reduction X
InactivityTimer Offset increase X
Include WCDMA SysInfo @ RwR if HO
preparation fails
X
Include WCDMA SysInfo @ RwR when
available if measurement times out.
x

REDIRECT WITH SYSTEM
INFORMATION
› Description
– Speech call setup for legacy voice from LTE, where a CS Fallback is performed
to 3G/2G including system information for the cells in the RRC Connection
Release message; States: CSFB+RwR from LTE Idle and LTE Connected
› Pros
› Cons
– n/a
› Dependencies
– Support also required in SGSN-MME and RNC
– L12
› Reference
– Feature Description, Redirect with System Information

PSHO based CSFB
LEGACY
› Description
– Speech call setup for legacy voice from LTE where a PS HO is performed to
WCDMA before continuing with the speech call setup; States: CSFB+PSHO
from LTE Idle and LTE Connected mode
› Pros
› Cons
– Failed HO preparation delays the CST
› Dependencies
– RNC, and SGSN/MME need to support PSHO
› Reference
– Feature Description, PSHO-Based CS Fallback to UTRAN

DRX in Idle mode
(320 ms) LEGACY and VoLTE
› Description
– Paging cycle set to 320 ms instead of default 1280 ms
› Pros
– Reduced CST by 480 ms in average due to faster paging
› Cons
– Increased paging load and increased UE battery consumption in RRC
Idle mode
› Dependencies
› Reference

SI: CSFB + RwR L17.Q3
SIGnaling reduction Legacy
› Description
– Optimized speech call setup for legacy voice from LTE for CSFB with RwR in Idle. The system
improvement reduces the amount of signaling when no CSFB measurements are needed by
removing the RRC Connection Reconfiguration procedure to setup measurements in LTE and
skipping the Security procedure ; States: CSFB+RwR from LTE Idle
– Parameter: eNodeBFunction::zzzTemporary54 = 1
› Pros
– Reduced CST with ~ 200 ms
– Signaling load reduction
› Cons
– n/a
› Dependencies
– L17.Q3
› Reference
– Feature Description, CS Fallback to GERAN and UTRAN

Increased QCI-1 Inactivity
Timer Offset
› Description
– Inactivity Timer Offset increased for QCI1 meaning increased probability for the
UE to stay in RRC-CONNECTED state at the time for the next call
› Pros
– CST reduced with up to 500 ms
› Cons
– Negative impact on eNB idle mode load balancing functionality, UE might be on
the ”wrong” frequency layer meaning increased risk for dropped calls and lower
MOS.
– Also negative impact on UE battery performance and eNB load
› Dependencies
› Reference

SI: CSFB + PSHO L17.Q3
WCDMA SyS INFO @ HO failure Legacy
› Description
– WCDMA System Information is now included also for CSFB+ PSHO when the HO preparation
fails and a fallback to RwR is required. Previously no system information was included for that
scenario States: LTE Idle and LTE Connected
– Parameter: eNodeBFunction::zzzTemporary54 = 1
› Pros
– Reduced CST
› Cons
– n/a
› Dependencies
– L17.Q3
› Reference
– Feature Description, PSHO-Based CS Fallback to UTRAN

SI: L17.Q3
RIM @ Measurement TIMEOUT Legacy
› Description
– System Information is now also included in the RRC Connection Release message
when the IRAT measurements times out when Measurement based CSFB is active.
Previously no system information was included for that scenario. Speech call setup
for legacy voice; States: CSFB+RwR from LTE Idle
– Parameter: ::zzzTemporary54 = 1
› Pros
– Reduced CST
› Cons
– n/a
› Dependencies
› Reference

Epc Enhancements
List of Enhancements Impacted Domains
UE RAN EPC IMS MSS UDM
PSHO based CSFB (for CSFB) X X
RwR based CSFB with RIM (SI tunneling)
(for CSFB)
X X
Homogeneous-Support-of-IMS-Voice-Over-
PS-Sessions (for VoLTE)
X X

PSHO based CSFB
› Description
– Speech call setup for legacy voice; States: CSFB+PSHO from LTE Idle
and LTE Connected mode
› Pros
– Reduced CST up to 2.8 e2e
› Cons
– Currently delays CST for UEs not supporting F-DPCH
› Dependencies
– UE must support F-DPCH, SRB on HSDPA and PS RABs must be
enabled
– eNB, NB, and SGSN/MME need to support PSHO

RIM for CSFB-RwR
› Description
– RIM procedures SGSN-MME used to tunnel SI information from target RAN to
source RAN via packet core so that the UE does not need to wait for SI broadcast in
the target cell during the call setup procedure
– Applicable for both 2G and 3G.
› Pros
– Reduced CST up to 2.4s e2e for WCDMA, and up to 4.0s e2e for GSM
› Cons
– n/a
› Dependencies
– Requires support in SGSN/MME, eNB, and NB

Homogeneous-Support-of-IMS-
Voice-Over-PS-Sessions
› Description
– HSS may skip signaling towards MME during TADS procedure if all
tracking areas (TA) in the LTE RAN supports VoLTE
› Pros
– Reduced CST (from one sequential HSS-MME signaling round trip)
› Cons
– n/a
› Dependencies
– Support required in HSS
› Reference

Ims Enhancements
Disable NRBT MTAS
Disable precondition SBG
SIP failover parameter settings SBG
CSCF
MTAS
Activate DNS cache in IMS nodes SBG
CSCF
MTAS
Remove unnecessary MEGACO
messages
SBG
Disable NPLI in SCC AS MTAS

disable NRBT/CAT
› Description
– NRBT/CAT requires additional signaling and user plane resources to be setup before the alerting
tone can reach the calling party. By disabling the NRBT feature in MTAS (by configuration) and
instead relying on the UE’s local ringtone the call setup time will be reduced.
› Pros
– Reduced CST with 450 ms
– Reduced signaling load
› Cons
– For calls where the ringback tone is not generated locally in the UE there will be silence before
the B-party answers. This may lead to 1) annoyance by the users, and 2) increased number of
calls where A-party hangs up before the B-party answers.
› Dependencies
– n/a
› Reference
– Functional Specification, Network Provided Ringback Tone in MTAS

disable SIP pre-condition
› Description
– SIP pre-condition is used for ensuring that user plane resources are reserved
e2e before the called party is alerted. However, by disabling pre-condition in the
SBG the called party will be alerted much earlier in the call setup procedure.
› Pros
– Reduced CST with up to 600 ms for IR.92 version 10 compliant UEs (typically
used in benchmark tests), even larger reduction for pre-version 10 UEs
› Cons
– Increased risk for ghost ringing and failed SRVCC handovers in alerting and
pre-alerting call state
› Dependencies
– SMM script needed in SBG
› Reference

SIP failover parameter
settings
› Description
– Configurable SIP timers for CS breakout and other timers on SIP level in SBG,
CSCF and MTAS have an impact on voice qualifier KPIs. Identifying important
parameters can provide a parameter list to crosscheck for optimal CST and network
performance.
› Pros
– Reduced CST and improved call success rate
› Cons
– n/a
› Dependencies
› Reference
– Functional Specification, IMS Centralized Services in MTAS

Activate DNS cache
› Description
– Activation of DNS cache in SBG, CSCF and MTAS to avoid DNS lookup for address
resolution for each call
› Pros
– Reduced CST with 10-20 ms e2e
› Cons
– n/a
› Dependencies
– n/a
› Reference
– User Guide SBG
– User Guide CSCF
– User Guide MTAS

Remove unnecessary
MEGACO messages
› Description
– The activation of this feature will skip MEGACO MODIFY messages between SGC
and BGF when receiving SIP UPDATE with a subset of SDP parameters that
matches parameters from the SIP INVITE
› Pros
– Reduced CST with 10-30 ms in SGC
› Cons
– n/a
› Dependencies
– Only need to change the behavior in SGC part of SBG (nothing required in BGF)
– SIP Pre-condition
› Reference
– MoP, Remove unnecessary MEGACO messages

disable npli in SCC AS
› Description
– Network Provided Location Information (NPLI) via HSS requires an additional
signaling procedure in sequence with the call setup procedure. By disabling the
HSS-NPLI lookup in SCC AS the delay for this additional procedure can be avoided.
› Pros
– Reduced CST by 80 ms (40 ms MO + 40 ms MT) for VoLTE to VoLTE calls
– Reduced CST by 180 ms (40 ms MO + 140 ms MT) for VoLTE to 3G calls
› Cons
– Location information will not be available when no NPLI is provided in SIP or when
the provided SIP NPLI is not valid
› Dependencies
– n/a
› Reference
– Feature Description, Network Provided Location Information retrieval in SCC-AS

MSS Enhancements
Parallel Radio Resource Assignment Optional
from
15A
Early Alerting (X) Optional
from
15A
Early Connect Basic
CSFB Accelerator (X) Optional
from
16A
Selective Authentication Basic
Suppression of IMEI Fetch Basic
Multi-Vector Fetch Basic
I2 for MO calls 18A

Parallel Radio Resource
Assignment
› Description
– Terminating MSC triggers Radio Resource Assignment (Traffic Channel or RAB) in
parallel with the Resource Assignment on the originating side instead of triggering it
after the Resource Assignment on the originating side is completed
› Pros
– Reduced CST with up to 600 ms
› Cons
– n/a
› Dependencies
– Delivered as a product customization (MDE) from MSC 16A, general available in the
MSC Base Package (ESM) from MSC 18A
› Reference
– Parallel Radio Resource Assignment, MDE Feature Description

Early alerting
› Description
– Called subscribers alerted before RR (Radio Resource) Assignment on the
terminating side. Calling subscribers may also be alerted before RR Assignment on
the originating side if the CN applies Ericsson-BICC for the call. The feature also has
a blacklisting function for UE’s that do not support early Alerting.
› Pros
– Reduced CST with up to 1s for method 1 and up to 600 ms for method 2
› Cons
– A few older non-standard compliant handsets do not work with Early Alerting but the
feature comes with a black list function where these handset models are defined
› Dependencies
– Delivered as a product customization (MDE) from MSC 16A
› Reference
– Early Alerting, MDE Feature Description

Early connect
› Description
– The connect from the terminating mobile is sent faster to the calling mobile. This is achieved by
setting the AXE parameter TCONTYPE to 0, instead of default 1, leading to that the bothway-
through connect for the call is performed at “alerting” (ringing) instead of at connect.
› Pros
– Reduced CST with up to 260 ms for method 2, no gain for CST method 1. There is lower gain if
only one of A or B-party is the CS access.
› Cons
– Increased signaling load in the M-MGw for calls that are not answered
– Increased risk for fraud by through-connecting user plane at alerting
› Dependencies
– Basic functionality
› Reference
– Application Information, Parameter Set GSMMSSC Changeable Exchange Adaptation, chapter
2.128 TCONTYPE

CSFB Accelerator
› Description
– Suppression of authentication, IMEI fetch/check, and TMSI reallocation for MO and MT CSFB calls
› Pros
– Reduced CST with up to 1.6s e2e (CSFB to CSFB call) for both method 1 and 2
– Reduced risk for fraud compared to selective authentication
– Reduced signaling and processor load in MSC, HLR/AuC, and EIR
– Reduced need for authentication vectors
– Add bullet:
– Reduced risk for using black listed device compared to suppressing IMEI fetch for all calls
› Cons
– Increased risk for fraud when suppressing authentication. However, this risk is removed when the SGs MO CSFB
INDICATION message is received from the MME (sent only if MME performed LTE integrity protected CSFB procedure).
– Increased risk for using black listed mobile phones. However, this risk is removed when the MME checks IMEI against blsk
listted IMEI's.
› Dependencies
– Optional MSC SW feature in CS Fallback Value Package
– MME support for the SGs MO CSFB indication message
› Reference
– Feature Description, CSFB Accelerator
– Value Package Description, CS Fallback

Selective authentication
› Description
– Suppression of authentication for up to every 15th transaction with the UE (configurable
occurrence per MO and MT transactions).
› Pros
– Reduced CST with up to 400 ms for both method 1 and 2. Note, authentication is typically not
suppressed for all calls.
– Reduced signaling and processor load in MSC and HLR/AuC
– Reduced need for authentication vectors
› Cons
– Increased risk for fraud
› Dependencies
– Optional MSC SW feature in CS Fallback Value Package
– MME support for the SGs MO CSFB indication message
› Reference
– Feature Description, Basic Security Features for GSM
– Feature Description, Basic Security Features for WCDMA

Suppression of IMEI fetch
› Description
– Suppression of IMEI fetch over the radio interface at call setup. IMEI is fetched
at registration and stored in VLR for reuse during the call setup procedure.
› Pros
– Reduced CST with up to 150 ms for both method 1 and 2
– Reduced signaling between MSC and UE
› Cons
– Increased risk for using blacklisted mobile phones
› Dependencies
– Basic MSC functionality
› Reference
– Application Information, Mobile Telephony Data Changeable Exchange
Adaptation, chapter 4.1 for parameter IMEICONTROLCLLS

Multi-vector fetch
› Description
– The MSC increase the buffer of Authentication Vectors, to reduce the number of calls where the AV's
needs to be fetched during the call.
– Up to 5 authentication vectors (AVs) can be fetched from the HLR/AuC for a user at a time instead of 1
AV at a time. The AVs are stored in VLR and reused for next coming transactions with the UE in order to
avoid delay from MSC-AuC signaling during the call setup procedure.
– AXE parameters:
› AUTHVECTORREQ for no. of requested AVs from HLR/AuC (1-5) set to “5”
› AVTHRESHOLD for no. of unused AVs in VLR before fetching new AVs (0-5) set to “1”
› Pros
– Reduced CST for authenticated calls with up to 40 ms for both method 1 and 2
– Reduced signaling load between MSC and HLR/AuC
› Cons
– n/a
› Dependencies
– Basic MSC functionality
› Reference
– Mobile Subscriber Related Security Functions in MSC/VLR Server, chapter 3.2.7 Handling of
Authentication Data

ICS I2 for MO calls
› Description
› Routing of MO ICS calls to IMS based on preconfigured routing information in the
MSC instead of applying CAMEL procedures per call basis to obtain IMS routing
information from SCCAS-SCF.
› Pros
– Reduced CST with up to 1s for MO ICS calls compared to using CAMEL routing procedures.
Valid for both measuring method 1 and 2
– Reduced CAP/SS7 signaling
› Cons
– n/a
› Dependencies
– MSC 18A and the Service Continuity Value Package (ESM)
› Reference
– Value Package Description, Service Continuity (enhancement)
– Feature Description, IMS Centralized Services

UDC Enhancements
TADS signaling optimization X
Homogeneous Support of IMS Voice
Over PS Session
X X
Derive MSISDN from IMPU X
GEP5 upgrade X
CBA improved behavior(internal) X

TADS signaling optimization
› Description
– Retrieval of serving SGSN information from CUDB instead of via MAP-ATI towards HLR
– Derive IMSI from IMPI or MSISDN from IMPU if they are presented into UDR for TADS
– Interaction with multiple subscription data support (ph2 EoY 2017)
› Pros
– Reduced CST with 85 ms or more
› Cons
– n/a
› Dependencies
– Phase 1 without multiple subscription: UDC 1 Q3-17
– Phase 2 with multiple subscription: UDC 1 Q4-17
This functionality is coming in Q4/2017, release is HSS-FE 1.13 end of December
› Reference

Homogeneous Support of
IMS Voice Over PS Session
› Description
– If MME indicates to HSS over S6a that VoLTE is supported in all TAs (homogenous VoIP support), the
HSS does not need to send a TADS info request to the MME
› Pros
– Reduced CST with 15-20 ms
– Reduced signaling load (HSS-MME)
› Cons
– n/a
› Dependencies
– Support in MME and HSS-FE
› Reference
› EPS Location Management in ESM
› This functionality is available since Q1/2017, as an enhancement of HSS Value Package
Service Continuity:
› https://lighthouse.lmera.ericsson.se/fs/package_version_revisions/enhancements/5672

Derive MSISDN from IMPU
› Description
– Configuration option in HSS-FE for deriving MSISDN from the stored IMPU so
that the CUDB does not need to be requested (one query-response procedure
avoided)
› Pros
– Reduced CST with 24 ms
– Reduced signaling load (HSS-CUDB)
› Cons
– n/a
› Dependencies
– Support in HSS-FE and CUDB (Q4-17)
› Reference

GEP5 upgrade in CUDB
› Description
– CUDB HW upgraded to GEP5 from GEP3
› Pros
– Reduced CST with up to 80 ms
› Cons
– n/a
› Dependencies
– GEP5 HW
› Reference

Component based
Architecture (CBA)
› Description
– 70% faster processing with CBA compared to TSP platform
› Pros
– Reduced CST
› Cons
– n/a
› Dependencies
– CBA
› Reference
– CBA with UDC 1 SW

Stakeholders:
Sven Gemski, Reza Cheraghi, Afshin Abtin
Contributors:
IMS – Magnus Ljung L, Anders Kåwe
MSC - Peter Callmer
RAN – Anders Ohlsson, Maria Hultström
EPC – Robert Zhu
UDC – Paloma Cubero
E2E – Sven Gemski, Magnus Ljung, Michael Anehill,
Afshin Abtin, Raimundo Garcia Fernandez

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