Embrace the LTE Era
Embrace the LTE Era
VoLTE, the Strategic Choice
VoLTE, the Strategic Choice
Yang Qin, Cloud Core Network Marketing Dpt
Contents
Contents
VoLTE improve spectrum utilization
VoLTE improve spectrum utilization
Build up best experience VoLTE Network
Build up best experience VoLTE Network
Accelerating 4G Migration
VoLTE is an inevitable choice with the closing of 2G/3G network
2G/3G would be a thin network with the migration from 2G/3G voice to VoLTE
2017/1/1
Officially
Closed 2G
2012
Closed 2G
2016/12/1
Announced
Close 2G
#1 Spectrum aggregation
2G/3G spectrum release and make it as a thin network for roaming service and etc
.
2G/3G
Now
2020+
LTE
LTE
LTE
2017
Close 2G
Close 3G in
2020
2017
Close 2G
#2 Simple network and saving cost
More and more operators chose to close 2G or 3G, to avoid operating more than 3 networks
Close 2G in
2020 in Norway
2G/3G
VoLTE Booming under Low Band Spectrum Refarming
Phase One(2011-2016)
•
Refarming 1800MHz for Data Service
Refarming 1800M is Mainstream in Phase One
lower frequency spectrum travels
further & penetrate
buildings better than higher ones
47.2% LTE operators
refarming 1800M for higher
data capacity
2017, Refarming 10M@900M 2017, Refarming 4.4M@900M 2018, Refarming 5M@900M 2017, Refarming 5M@900M
VoLTE offload voice traffic from LB Spectrum while 2G voices service mainly stay on LB
LB Spectrum gives continuous converge for VoLTE
Phase Two(2017-2020)
•
Refarming 900MHZ for LTE Coverage & VoLTE
•
Ready for 2G or 3G switching off
900MHz
2G
3G 4G
Global VoLTE deployment is Accelerating
HKT Case: Spectrum 900MHz Refarming in 2014 - 2017
4G user pen.
rate(data)
VoLTE user pen.
Rate(voice)
30% NA
4G user pen.
rate(data)
VoLTE user pen.
rate(voice)
60% 30%
4Guser pen.
rate(data)
VoLTE user pen.
rate(voice)
74% 60% 30M@1800refarming
2 x 15MHz L2600 Network Ready CSFB VoLTE initial Commercial 3M@900MHz refarming 5M@2100MHz refarming2011
2012
2013
2014
2016
2017e
3M@900refarming
Subway coverage enhancement 20M 900 LTE 20M LTE 5M 2600 2100 UMTS 15M LTE 5M UMTS 10M LTE 3M UMTS 5M 30M 1800 LTE 30M UMTS 6M 5M 30M 15M 20M 900 LTE 20M 2600 2100 UMTS 15M 1800 GSM UMTS LTE GSM 30MLTE UMTS 6M 8M 8M 6M 6M 10M LTE 3M UMTS 3M UMTS 5M Contents
VoLTE improve spectrum utilization
Build up best experience VoLTE Network
Accelerating 4G Migration
China Mobile Built Up the Largest-Scale VoLTE Network
• 1.3M LTE Base Station
• Total 4G User: 500M
• VoLTE Commercial Launched in 27 Provinces
• Total VoLTE Active User: 100M (20% penetration)
National Wide VoLTE Commercial
Be Lack of LB Spectrum for VoLTE
60M 2600 TD-LTE 2100 1900 1800 GSM 50M 900 GSM40M 15M 20M 10M 20M 50M 10M 40M TD-SCDMA
TD-LTE & TD-SCDMA
GSM
TD-SCDMA LTE
• Globally, 102 operators launched VoLTE
• Only 13 of them do not have LB LTE, e.g
Algeria Mobilis, Bahrain Batelco, Canada Rogers，Macao CTM, Malaysia Yes, DiGi, Slovakia 4ka，Denmark Telenor,
Key Learning 1: VoLTE deployment is unprecedented in
its complexity and a great challenge to carrier networks
• GSM Call: 8 NEs,9 Interfaces，VoLTE Call:21 NEs, 38 Interfaces（in CMCC）
• Mulit-vendors、Device Immaturity，Multi-Services
• SRVCC HO、Service inheritance & consistency 、 Roaming
• Bad voice experience under weak coverage
• 70%-80% issues need cross-domain
demarcation & troubleshooting
Network Complexity
：More NEs, Long Path
Multi-Domain Collaboration
：2G/3G/4G
O&M
：challenge of demarcation &
troubleshooting
BOSS NMS OMC Operation Support Layer Service Layer IMS Domain PCC eNodeB BTS/BSC LTE Access Access Layer 2G AccessTerminals UE(chip)VoLTE
I/S-CSCF /BGCF DRA PCRF VoLTE SBC MGCF IBCF SAE GW/ GGSN/PC EF DNS /ENUM eMSC GMSC CallSignature Platform CRBT Platform VoLTEAS /IM-SSF IN SCP MME/ SGSN IP-SM-GW Sh Mw SGi Rx Gx Mx Sv S11/Gn Mg/Mj Nc Nc CAP CAP S1-MME S1-U Uu Mw/I2 Um A Gb ISC Bearer Layer Location Service Platform Cx Rx/Gx S6a/SLg Cx/Sh/Zh/ S6a/SLh SLh/SLg SLs Bearer Network J Ut Gm Service ProxyGW Ut Zh C/D Gr PS Core Signaling Network Core Layer Subscriber Database Convergent HSS 2GCS Domain
10 Tasks for VoLTE Network Reconstruction
SN
Field
Task
1 Diameter signaling network
construction
Deploy session DRAs provided the same vendor in pairs.
2 EPC-HSS/IMS-HSS/HLR
convergence reconstruction
Upgrade and reconstruct the HSS/HLR on the live network to support IMS-HSS. If the HSS/HLR on the live network does not support the convergent HLR/HSS, deploy new ones.
3 IMS Core construction and
reconstruction
Deploy or reconstruct the I/S-CSCF, MGCF, and ENUM DNS on the live IMS network.
4 CS/PS core network upgrade and
reconstruction
Configure the MSC, MME, and SAE-GW to support eSRVCC and IPv6 addresses.
5 4G PCC network upgrade and
reconstruction
Upgrade the PCRF and PCEF to support VoLTE dedicated bearers.
6 Service platform building and
intelligent network reconstruction
Deploy the service platform, such as ATS. Reconstructs the platforms of intelligent network, SMS, CRBT, mobile printing, and LSP services.
7 IP bearer network upgrade and
reconstruction
Reconstruct devices on the IP bearer network to support IPv6 addresses.
8 Service supporting system and
NMS construction
Manage and control service subscription, charging, and networks.
9 2G/4G/4G wireless network
upgrade and reconstruction
Upgrade and reconstruct eNodeBs on the entire network to support eSRVCC. TTIB, ROHC, Voice COMP
Key Learning 2: Initial Wireless Coverage Designing for Data,
Need to be Enhanced for VoLTE
Accurate assessment, better coverage
Real-time voice requires better wireless coverage and quality than data
Experience from CMCC TDD:
Voice: -113dBm > Data: -118dBm
Air interface optimization for voice
Optimization in CMCC Zhejiang
• MOS>3: 86% -> 97%
• Call drop rate: 0.82% -> 0.29%
Weak coverage area
• Low voice quality • High drop rate
• Single pass…
-118 dBm
-113 dBm
Quality and Coverage Optimization based on TTIB,
ROHC, Voice COMP, Rate adjustment
KPI
iPhone6s+ iPhone6s iPhone6+
iPhone6
CMCC N1
Samsung S6 MATE7
MATE8
MO Session Connection Rate 87.08% 85.83% 85.82% 85.76% 85.76% 89.32% 90.38% 88.65% MT Session Connection Rate 98.63% 98.46% 98.56% 98.56% 98.56% 95.81% 98.60% 99.41% Call Delay
VoLTE-2-VoLTE(ms) 3322.55 3330.25 3459.97 3366.23 2735.20 2962.57 3382.82 3103.83 Success Rate of SRVCC HO 85.23% 86.99% 87.17% 97.26% 97.08% 85.34% 90.12% 92.73% Registration Success Rate 97.88% 97.58% 97.76% 97.60% 99.32% 85.06% 89.18% 95.08% Uplink MOS 3.88 3.87 3.88 3.87 3.85 3.87 3.84 3.88 Downlink MOS 3.92 3.92 3.92 3.92 3.52 3.88 3.77 3.78
KPIs vary significantly from Different Terminal even in the same network
Oneweek after enabling iPhone6 VoLTE function, 19 Top issues came out
• Apple release iPhone’s ‘Carrier Setting Updates’ supporting VoLTE from 20thFeb , So iPhone6 could switch on VoLTE function.
No.
Type
Summary
Route
Cause
Solution
TOP1 Connect Failed
iPhone can not be connected when just come back from blank LTE coverage.
iPhone didn’t unregister when enter the no coverage, Fail to register to Network when come back to LTE coverage. When called, receive 404 response from network
1. Start CS RETRY function by 404 response, connect iPhone in CSFB way
2. Switch iPhone to flight mode and back to normal TOP2 Connect
Failed
iPhone6 that have been upgrade to jailbreak version could not make a call to Non-VoLTE subscriber
Codec negotiation fail with CS user when enable VoLTE
1. Check all the non-standard iPhone, and send message to the user to reboot iPhone and upgrade official iOS.
2、switch off VoLTE, fall back to CS to make a call
Key Learning 3
：
Immaturity of Terminals
Huawei Facilitate VoLTE Device Integration
Scenario Test Content Case Num. New Vendor’s new product All Test Cases 600 Same Vendor’s new
product(Chipset andprotocol stack are different)
All Test Cases 600 Same Vendor’s new
product(Chipset andprotocol stack are same)
Terminal Operation
Cases 300 Terminal CommercialCapability
estimate for project.
Terminal Capability
Case. 150 Test Catalog Test Content
Terminal Capability test Terminal VoLTE Capability defined by IR92. Terminal Operation test
The effect for VOLTE service in case of do sundry operation in UE, like 2/3/4G network selection, 4G/data/VoLTE switch off and on etc. Unexpected Reponses
Cases Test
UE’s behavior when network returns unexpected Reponses like 3XX/4XX/5XX/6XX etc.
Terminal Inter-Operation Test
Inter-Operation between different terminal, especially Video call QoS.
We are defined terminal Compatibility testing cases and performing compatibility test with popular VoLTE/VoWiFi Terminal.
2016Q4 2017Q2 Galaxy S7 Xperia Z5 Mate9/P10 T e s t i n g R o a d m a p
More than 50 VoLTE/VoWifi terminal/chipsets has been integrated.
Over 30 VoLTE terminals are commercial launched w ith Huawei Core Network
iPhone7 VoWifi
2017Q4
Roadmap synchronization in every 6 months
Mi 5
We are here now
R9 VoWifi Galaxy S8 Xperia Mate10 iPhone7VoWifi VoWifi VoWifi TBD iPhone7S VoWifi VoWifi TBD TBD
VoLTE feature phone accelerate VoLTE users growth
of three types operators
Facebook Whatsapp Twitter
25$
Basic requirement
satisfy two types of users
Tariff subsidies promote
low-end voice user
migration. Cultivate MBB
habits with low cost.
Operators of pure LTE
Operators of spectrum
shortage
Operators of closing 2G
network
China Unicom/Turkey VDF/
Australia VHA
India RJIO / Egypt TE
Indonesia/ Saudi Arabia/
Thailand/ Latin America
Aged users Low-end
Key Learning 4: From Trial Deployment to Commercial,
E2E Network Optimization & Fine-tuning of Live Network is a MUST
Different User Behavior
Complexity in Live Network
KPI
don’t reflect real
user experience
Multi-band synergy Weak Coverage Capacity e.g. uplink
Interference check
Swallow Voice
Two-way no Audio Intermittent Voice
One-way Audio • High Speed Handover
• Big Event
• Outdoor / Indoor • Immature Devices • VIP / VVIP
SRVCC threshold
CMCC “100 Days Campaign” for
VoLTE Experience Optimization
29 province, 200 Cities, 1000+ issues, 90+ solving ratio,
E2E team cover Core/Wireless/IP Bear/IN/Device
75% 80% 85% 90% 95% 100% 0 5 10 15 20 25
VoLTE issues Issue solving Ratio
4 Measures to Optimize VoLTE eSRVCC
CEM platform
Visualize
eSRVCC performance
eSRVCC handover successful rate improvement
eSRVCCHandover successful Rate & Delay
Identify the poor performance Cells Load balance Optimization 2G parameter consistency check Heterogeneity neighbor SRVCC Threshold 4 Measures
• Based on Neighbor GSM coverage • Based on Frequent handover band
• Based on neighbor GSM cell sample and signaling Strength • Based Dual model phone, occupy LTE/GSM at same time
handover successful rate in Hangzhou improved by 5% 88.76% 93.12% 12% 14% 74% 2G/3G WL IMS Core 4G WL
• SRVCC handover failure cause • poor performance cell
• bSRVCC, aSRVCC, eSRVCC
Failure cause proportion
One device in GSM in the same device in the
same time
Dual Model Phone
GSM
pairing NMS
NMS One device in LTE in the same device in the
Key Learning 5: Service Driven FMC Practice
VoLTE for Video
Customer Service
TV/STB & VoLTE Video
Calling
Convergent Video
Conference
VoLTE for video
monitoring
IMS
A-SBC Fixed Device Soft TerminalMediaX
IMS
A-SBC VoLTECTAS
VoLTE AS/IP-SM-GW A-SBC IPC A-SBC WebRTC“Dual Cross”Network
Cross country, cross province
Mobile VoLTE Network
MediaX
Open GW
IMS
CTAS
VoBB AS
Fixed VoBB Network
A-SBC Fixed Phone A-SBC TV/STB MCU HSS SDM HSS
More Discussion about FMC
IMS
A-SBC Fixed Phone A-SBC VoLTECTAS
VoBB Voice/Mobile Voice/SRVCC AS/IM-SSFCommon IMS For both
Fixed and Mobile Voice is
NOT a technology issue
Deployment Complexity
But…
Operation: Need convergent O&M team expertise
IP network need to be integrated
Service Agility
• Legacy fixed service inheritance • Fixed line cutover
• Routing configuration
• VoLTE Service e xperience • xSRVCC
• Device integration • E2E provisioning • Roaming
• CS Team manage both CS Core and VoLTE IMS, because xSRVCC synergy • Fixed Team manage both TDM Swich / NGN / Fixed IMS for legacy service parity
Mobile Fixed IMS IMS
IP Net
IP Net
Site A
Site B
Fixed Service Test case XXXX Software upgrading very few Mobile Service Test case XXXXSoftware upgrading frequently for new service, new device
VoLTE IMS & CS Core co-site HLR & HSS co-site
SBC & EPC co-site
Contents
VoLTE improve spectrum utilization
Build up best experience VoLTE Network
Accelerating 4G Migration
Huawei DSP, LTE/VoLTE Migration Accelerator
4. 4G/VoLTE Package
Recommendation
3. 4G/VoLTE Service
Automatic Activation
1. 4G/VoLTE Terminal
Precise Promotion
2. SIM->USIM Quick
Upgrading
USIM SIM USSD 4G/VoLTE Terminal Penetration ImprovedLTE/VoLTE Service Enabled At the Best Time USIM Card Upgrading
Anywhere Anytime Personalized Promotion Traffic Stimulation 4G/VoLTE terminal USIM card VoLTE Switch
Boosts 4G subs for Thailand TRUE
More ARPU=0.5$ for 4G subs / month
More revenue =0.5$*0.7M*12*12
= 50.4M$/year
Some
use
case
of
DSP
Business
Value
Precise Marketing
location & device brand & SIM card
Easy to Change SIM Card
Two steps of self-service
Less time consumption
2-3 hours
5 minutes
More
“Service Hall”
350
8800+ (True)
Speed up Migration
140K/3Months1.7M/3months, 12 times
Fast Deployment
12 Month3 Month
Make effort in TRUE
Jan Feb 45 46 50 Dec. Without DSP: 141K in 3 month Mar 300 Apr May 600 800 With DSP: 1.7M in 3 months, 5.1M in 7 months AVG: 0.7M / Month DSP BSS
SIM > USIM USSD automatic change
4G service automatic activation
LTE terminal promotion
promotion messages
Enlarge Indoor Service Coverage with Native VoWiFi
Incorporate VoWiFi and
VoLTE into device
No
Extra APP
Reuse
phone number
Crystal-clear
HD Voice & Video
Seamless
handover
Chipset supports
VoWiFi by default
LTE
VoLTE&VoWiFi
Converged NW
WiFi
Prefer the ePDG/IMS based solution
AAA
ePDG
Any WiFi
Accessible
The Business Driver of VoWiFi
MVNO Saving cost
of air interface rentingHK
Differentiate with iphone6
Multi-device, Seamless handover and HD
voice
Super iPhone6,
Super 3 network
Coverage Improvement
Cost efficient Roaming
Multiple Device Service
Industry reference
• Accepting call with a single published number.
• Simultaneous or sequential ringing to several terminals.
Receiving Call
Call: +86138123
CTAS
Simultaneous or Sequential Ringing
VoLTE/VoCS +86138123 VoLTE/VoCS +86138001 VoWiFi +86138002 VoCS +86138003 APP or Web +86138004 CTAS From: +86138123
Presentation as the Same Number
VoLTE/VoCS +86138123 VoLTE/VoCS +86138001 VoWiFi +86138002 VoCS +86138003 APP or Web +86138004
• presentation the single published number. • Charging to the same number.
Huawei VoWiFi Global Footprint
Till now,
26
contracts，
11
Commercial cases
ME
AP
LA
EU
Africa
UK Belgian Sweden Austria Saudi Saudi Saudi Thailand Thailand HK South Africa Poland DenmarkChina
Central-Asia
Mongolia BrazilCopyright©2017 Huawei Technologies Co., Ltd. All Rights Reserved.
Theinformationin thisdocument may contain predictive statements including, withoutlimitation, statements regarding the future financial and operating results, future product portfolio,new technology, etc. There are a numberof factors that could cause actual results and developments to differ materially from those expressed or implied in thepredictivestatements.Therefore, suchinformation is provided for reference purposeonly andconstitutes neither an offer noran acceptance. Huaweimay changethe information at anytime without notice.
Cloud Enterprise Communication on demand
China Telecom: One Fiber + One Box + One Cloud = New packages of ICT Services
55% revenue
from Enterprise
Severing 300K
Enterprise
Fiber Cover 80%
Enterprise
70% users
migrate to 4G
Plays Services IP Data BW Biz MD
1 Play Cloud PBX Voice 2M Minutes 2 Play Call Center Call
Center 10M Seats 3 Play Internet Internet 20M Monthly fee 4 Play Internal data Internat 20M Monthly fee 5 Play Mobile data Wireless
VPDN 10M data usage 6 Play Video
Conference Video 20M Minutes 7 Play Cloud DC DC data 100M Resources
Fiber Broadband Consolidation FMC、ICT Service Integration All kinds of Enterprise Various Terminals Comm. IT App Data ICT Voice Video Conf. Safe Console Hotline
Migrate 4 million users of on-premises
enterprise PBX to cloud in 3 years
China Mobile:
Benefits for enterprise:
• Packaging with FBB for low VC endpoint cost • One-stop subscription from CMCC, worry-free • No need of dedicated IT specialists
• Trustworthymulti-branch ICT solution
Benefits for China Mobile:
• Boost user loyalty with convergent comm. • HD VC fills pipe and leads to FBB upgrade • More cloud services, More revenue
Target:1500+multi-national/provincial companies
http://www.chinamobile-uc.com/ 9,595 22,819 29,974 41,126 56,428 77,424 14Q4 15Q1 15Q2 15Q3 15Q4 16Q1
