radio access networks - tty
TRANSCRIPT
Radio access
networks
Meelis Aus
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 2
Agenda
› Ericsson and me› Services we do› Challenges we have› Future we see› Demands we have
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 3
Optimization
Network Rollout
Operations & Support
IntegrationBuildPlanning & Design
Consulting
Turnkey Network Rollout
Project Management
IN COMBINATION WITHTECHNOLOGY LEADERSHIP
smartphones
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 5
battery
Battery lifetime is a challenge with smartphones
› Typically dominating: – display, when user is active
– 3G radio modem, when inactive– (CPU)
› Trend: – slow increase in battery capacity
– faster increase in components peak power
› Low duty cycle key for battery lifetime
Exa
mp
le, P
ow
ertu
tor
app
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 6
3G Traffic load Comparison
Data traffic
Sig
nalin
g tr
affic
Featurephones
SmartPhones
PCs
Data: IP packets to/from apps, services, InternetSignaling: Mobile-specific messages for managing mobility and resources for the Data traffic
Significant signaling x
Many smartphones =
Impact on some networks
Signaling load increasingly important with smartphones
”1” ”10” ”100”
”1”
”3”
”9”
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 7
smartphone challenges -
overview
Application server
Internet
MobileNetwork
Trade-off between:- Battery efficiency - Radio resources- Signaling & network resources- User experience (latencies)
Device behavior
New usage patterns
Application behavior
Networkbehavior
Battery Radio resources
Signaling &network resources
Userexperience
Chattytraffic
Application behavior
CN Proxy/FW/NATRAN
RAN = Radio Access NetworkCN = Core NetworkFW = FirewallNAT = Network Address Translation
Memory,IP addresses
Timeouts
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 8
Pow
er
Idle
device-triggered fast dormancy
IDLE CONNECTED
› Device trigger: data + display inactivity
› Problems: latency, signaling, shortcuts URA state
~ 3-5 s inactivity
Data rate
“High”
“Low”
URA
HSPA
FACH
“Standby”
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 9
Heterogeneous NetworksENHANCING NETWORK PERFORMANCE
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 10
0
50
100
150
200
250
300
350
400
Q107
Q207
Q307
Q407
Q108
Q208
Q308
Q408
Q109
Q209
Q309
Q409
Q110
Q210
Q310
Q410
Q111
Q211
Tot
al (
UL+
DL)
mon
thly
traf
fic (
Pet
aByt
e/m
onth
)
Voice Data
Mobile broadband
growthTraffic growth in 2011…
Source: Ericsson worldwide measurements
2x
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 11
0
50
100
150
200
250
300
350
400
Q107
Q207
Q307
Q407
Q108
Q208
Q308
Q408
Q109
Q209
Q309
Q409
Q110
Q210
Q310
Q410
Q111
Q211
Tot
al (
UL+
DL)
mon
thly
traf
fic (
Pet
aByt
e/m
onth
)
Voice Data
… and Looking Ahead
Source: Ericsson Strategic Forecast
data traffic per month
0
1
2
3
4
5
2008 2009 2010 2011 2012 2013 2014 2015 2016
EB
/mon
th
High-traffic smartphones Mobile PC Tablets
1000
2000
3000
4000
5000
Smartphones Mobile PC Tablets
Tot
al m
onth
ly tr
affic
(P
etaB
yte/
Mon
th)
data traffic per month
0
1
2
3
4
5
2008 2009 2010 2011 2012 2013 2014 2015 2016
EB
/mon
th
High-traffic smartphones Mobile PC Tablets
1000
2000
3000
4000
5000
Smartphones Mobile PC Tablets
Tot
al m
onth
ly tr
affic
(P
etaB
yte/
Mon
th)
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 12
WINNING STRATEGY
HIGH END & MASS MARKET
DEVICES
SERVICE DIFFERENTIATION
NETWORK IS THEDIFFERENTIATOR
Subs
PriceDemand-basedpricing / QoS
Speed & Latency
Capacity
Coverage
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 13
It’s About End User
Experience
Always onAlways on
CoverageCoverage
Speed andlow latencySpeed andlow latency
CapacityCapacity
Coverage is taken for grantedBut is bitrate dependent
Cell edge performanceuser experience
Data and voice volume capacity to serve all subscribers
Signaling Capacityeverywhere
An unsatisfied Smartphone user may become a subscriber lost!
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 14
EVO RAN One Network – One Asset
• Everywhere Seamless Service• Coordinated Multi Layer Cells• Multi RAT RAN technology
agnostic network
HSPA
High end & Mass market
LTE
High end market
WiFi
Mass market spotty coverage
GSM
Mass market
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 15
Network architecture
grade
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 16
End User Experience Challenges
Pro
vide
d da
ta r
ate 1
M-R & Pico
23 32
1) Need for capacity, peak data rate, latency reductionEnhanced macros: advanced receiver structures, Multi Carrier aggregation, etc.
2) Need for higher cell edge data rates Site densification: more macro, or smaller base stations (main-remote/RRU´s and picos)
3) Need for indoor coverageDedicated indoor solutions, Micro/Pico RBS & DAS combinations
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 17
Principles for network expansion
Improve and densify macro
Add outdoor small cells
Add indoor
small cells
WiFi complements good3GPP coverage & capacity
Coordinated RRUs for the most challenging radio environments
Find the right mixFor each part of the network and need
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 18
Key Areas› Drivers For Change› The HetNet Toolbox› Integrating small cells› Transport in HetNet› Operations & Maintenance
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 19
Heterogeneous Networks
Required
Capacity
Current
Capacity
Improve macro
Densify macro Add small cells
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 20
Coordinated Small Cells
Required
Capacity
Current
Capacity
Full spectrum reuse
RAN integrated WiFi
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 21
AIR– ANTENNA INTEGRATED RADIO
Main-remote with RRUS Main-remote with AIR
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 22
• Find hot spots, suitable sites and backhaul
• Deploy small cells efficiently
• Achieve target performance levels
• Optimize multi-layer radio performance
• Maintain small cells at low TCO
Customer Challenges
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 23
TCO Optimized for Small Cells
For small cell deployment 2/3 of cost are related to transport and site rental
Building site where it is “easy”may be the best alternative even if a few more sites are needed because this will help to reduce OPEX
RAN equipment9%
Site equipment2%
Civil works7%
Network roll-out3%
Site rental24%Transport
44%
Support and O&M8%
Energy3%
RAN equipment9%
Site equipment2%
Civil works7%
Network roll-out3%
Site rental24%Transport
44%
Support and O&M8%
Energy3%
CAPEX 21%
OPEX 79%
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 24
Bahrain Financial HarbourManama, Bahrain
Multi Operator In Building Solutions
• Financial center complex including two 53 floortowers, a 10 storey building and a mall.
• Main Remote RBS solution connectedto passive antenna systems
• Multi-band GSM 900/1800 and WCDMAsolution combined with Wireless LAN
605 Antennas!
› 70% of traffic generated indoors makes in building solutions a key part of HetNet for complex coverage areas!
– Multi operators, multi technologies and many frequency bands
– Property owners preferred one interface or is not allowing any mobile operators free access to building complex
› Up to now passive distributed antenna system (DAS) has in many cases been the preferred solution
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 25
mRRUS
mRBS
pRBS
2 x 5 W 2 x 1 W
Small RBS & Small RRU
Use with built in antennas or combined small Distributed Antenna System DAS
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 26
Carrier Grade WiFi a
valuable complement -especially indoors
› Many mobile operators are already widely deploying WiFi for Hot Spot coverage
› High and growing penetration of 2G/3G/LTE Smartphones with WiFi capability
› Carrier Grade WiFi provides scalability and quality
› …but many subscribers finds it cumbersome and unsecure to connect to public WiFi
.
ABI, Analyst Insider, August 2009
Source: Ericsson and market estimate
90%of Smartphones will have Wi-Fi
by 2014Up from 44% in 2009
Up to now - Lack of 3GPP/WiFi network integration have limited usability
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 27
Positioning of WiFi
WiFi Strengths› Very high performance in good radio
conditions› Low cost radio nodes
› No spectrum licensees needed reduces start up cost
› Terminals can automatically switch to WiFi when within range
WiFi Limitations› Unpredictable radio conditions makes
it a “best effort service”› Very short range, many nodes needed
› Anybody can set up access points at hotspots - lower revenue
› Terminals will lock on also to poorWiFi reducing over all experience and draining batteries in terminals
WiFi is not an alternative for providing everywhere always on access!WiFi is a good complement to a mobile network with full coverage
WiFi is mainly useful for active subscribers turning on their WiFi when at home, in office or at a public hotspot
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 28
Key Areas› Drivers For Change› The HetNet Toolbox› Integrating small cells› Transport in HetNet› Operations & Maintenance
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 29
INTER-LAYER RAN MANAGEMENT
Interference managem
entT
raffi
c m
anag
emen
t
Intra-FrequencyMobility & Extended Pico
Range
Interference Mitigation
Rx & distributed RRM
Inter-FrequencyLoad sharing & mobility
Inter-RATLoad sharing & mobility
Multi-Cell coordination
Macro div & joint RRM
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 30
Cell Edge Users Consumes More Radio Resources› Cause more interference
› Need higher transmit power for data and control channels
› Longer holding time due to lower achievable data rates
› More frequent handoversGeometry factorPath gain to own cell relative to other cell(s)
Rad
io r
esou
rce
cost
per
bit
Great capacity improvement by adding small cells at cell border – especially in traffic hot spots
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 31
Downlink/Uplink ImbalanceThe HetNet handover dilemma
› For heterogeneous network deployments the transmit power of Micro can be much smaller than for macro (Ppico<< Pmacro)
› Uplink sensitivity is more similar between Macro and Micro
› The best uplink cell does not neccessarily correspond to the best downlink cell...– Downlink: maximum CPICH Ec/No (or CPICH RSCP), RSRP– Uplink: minimum path loss
Optimal DL handover
Optimal UL handover
Macro cell Micro cell
Best downlink cell
Best uplink cell
Macro
Macro
Macro
Micro
Micro
Micro
10-15 dB!
Hierarchical Network Requires System Integration Betwee n Layers
Uncoordinated microcells will shrink in size
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 32
Key Areas› Drivers For Change› The HetNet Toolbox› Integrating small cells › Transport in HetNet› Operations & Maintenance
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 33
Mobile Transport Trends
› Shift in backhaul solutionsthe last and coming years for Macro Networks
› Packet Microwave and optical fiber pre-dominant
› Drivers – Capacity– Characteristics
TDM Microwave
Packet Microwave
Optical
Copper
100%
50%
0%2008 2014
Cell site connectivity
Does this trend apply for small cell networks?
No, it does not!
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 34
Small Cell Backhaul strategy overview› Highest possible Deployment flexibility
– Common transport for 3G, 4G and WiFi– Complementing backhaul aggregation portfolio
– Flexible transport requirements
› Fixed Backhaul– For both indoor and outdoor deployments
– Traditional telecom infrastructure: Copper & Fiber– Tactical Reuse: Cat5/6, POTS UTP, DOCSIS, DAS,
Powerline etc
› Wireless Backhaul– For outdoor deployments
– Both licensed and unlicensed spectrum,Line of Sight and Non/Near-LOS
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 35
Key Areas› Drivers For Change› The HetNet Toolbox› Integrating small cells › Transport in HetNet› Operations & Maintenance
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 36
Smart simplicity - SON
SmartSmartSmartSmart
SimplicitySimplicitySimplicitySimplicity
Deployment� Automated planning� Automated Preparation� Automated Integration
Maintenance� Automated monitoring� Automated failure handling� Automated administration
Optimization� Coverage� Capacity� Performance� Energy Efficiency
Additional smart simplicity benefits
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 37
Automatic Neighbor
Relations
› Creates neighbor cell relations– In real time– In time for handover– Automatic clean-up
› Operator in control– Policies– Visualization– Observation mode
› Related to– PCI (re)assignment in OSS
Comparison between manual planning and ANRShowing neighbor cell relation matrices
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ANR neighbors after 20 min & 1 user
1
2
34
56
ANR neighbors after 20 min & 1 userANR neighbors after 20 min & 1 user
1
2
34
56
1
2
34
56
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Manually planned neighborsManually planned neighbors
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305
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6
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321
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305
328
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5
6
User moving in a LTE network and ANR enables handovers
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 38
HetNet Summary
One Network 2G/3G/LTE/WiFi
Densification often driven by bitrate demand - not data volume
WiFi as a complement to 3GPP access – no coverage solution
Site, Transport and O&M new areas for innovation
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 39
Network engineer
› Participation in customer projects› Collection and analysis of customer requirements› Acquisition of network data and information› Perform Network Planning and Design› Perform Initial Tuning› Perform Network and/or Node Reviews/Audits› Perform Network Optimization including investigating network
performance and issuing, discussing and/or implementingrecommendations for network improvement
› Share knowledge from service deliveries in applicable forums
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 40
Radio network design
› Radio Propagation› Advanced/Special Radio Network Deployment› Antennas & ANP› N&TC Service Product Area› GSM/WCDMA/LTE Radio Network Traffic/Capacity› Mapping Tools and Data Formats› Network Perf (KPI) based on Field Measurements› Network Perf (KPI) based on System Measurements› Network Traffic Modelling› Radio Functionality and cell parameters› Radio Network Design & Tuning Tools › Radio Network Design Processes & Methods › Radio Network Dimensioning/Coverage Design› Radio Network Initial Tuning Processes
Radio Access Networks - Estonia | Ericsson Internal | 2012-09-17 | Page 41
Radio network
performance
optimization
› Antennas & ANP› N&TC Service Product Area› Radio Network Performance Improvement› Enhanced Capacity and Tight Spectrum Methods› GSM/WCDMA/LTE Radio Network Traffic/Capacity› MultiLayer (carrier) management› Network Perf (KPI) based on Field Measurements› Network Perf (KPI) based on System Measurements› Optimisation and Post processing tools› Radio Functionality and parameters› Service Quality for Radio Networks› Wireless End-to-end Performance
Thank you!