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01_RA41881EN01GLA1_Flexi Zone Micro Small Cells Introduction
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Nokia Solutions and NetworksRA4188 - Small Cells Introduction
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Document change history
Date Version Name Change comment
23.01.2014 1.0 Maciej Wais
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Objectives
• Explain the NSN Small Cells architecture.• Identify the placing of the Flexi Zone Micro LTE BTS products within the Small Cells
architecture.
• Identify and list the key components of the LTE system and be able to state the basicfunction of each network element.
• Identify the key interfaces within the LTE System and give a simple explanation of theinformation sent of each Network Element.
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Content
• Introduction to the Small Cell concept
• Small Cells architecture evolution
• Flexi Zone Micro LTE BTS within the Small Cells architecture
• Key components of the LTE Small Cell system
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• NSN Small Cell Roadmap
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Key requirements for networks towards 2020…
Support up to1000 times morecapacity
Teachnetworks to
-
Flatten totalenergyconsum tion
Reduce latencyto milliseconds
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Reinvent Telcosfor
the cloud
Personalizenetwork
experience
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Today’s problems
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Why small cells?
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Focus on LTE Small Cells
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The Evolving Role of Small Cells
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2012
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Small Cell Solution Needed for Supporting Mass Market Mobile Broadband
Subscriber Experience
Video apps define new CellEdge!!
Users/Sector & Distance define the experience
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Voice
15 kbpscell
edge
Email /
Web250 kbpscell edge
Video
1-4Mbps
cell edge Smaller Cells are Key for Capacity
Sector throughput sharedby many users
Each gets widely varyingexperience
Small cells improve distance
More sites = less throughputsharing + closer to center of cell
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Capacity enhancement
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Factors impacting operator small cell deployment timing
Stron data traffic rowth
Network is full
No refarmin o tions
Limitations on macro siteavailability & enhancements
Small cell
Limited spectrumavailability
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Technology maturity
ep oymen
urgency
LTE launch not feasibleHigh urban density &complexity
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When might a new macro site not be feasible?
• Cellular tower or pole is notaccepted by authority community
• New macro site is overkill
• No space for new macro site BTS orantennas.
• New macro site permits not grantedor site lease is very expensive
•
• Macro sites cells capacity is notenough
• More and smaller capacity cellsneed to be added
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• Safety regulations limit the
transmitted power at street level
• New macro site is overkill (cost,
capacity, size) for coverage fix orextension
• Smaller cell and low transmit power
is optimized for e.g. indoor usage,tunnels and parking lots
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Small cell site examples
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Small Cell types & Small Cell scenarios
Femto
WiFi
Indoor: 20-100mW
Outdoor: 0.2-1W
Coverage radius: 10s of meters
Indoor: 10-100mW
Outdoor: 0.2-1W
Coverage radius: 10s of meters
Indoor: >10W
Outdoor: >10W DAS
Home Office Airport
Shopping Center City Walk Stadium
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Pico
Micro
Macro
Indoor: 100-250mWOutdoor: 1-5W
Coverage radius:10s of meters
Outdoor: 5-10W
Coverage radius:100s of meters
Outdoor: >10WCoverage radius: kilometer(s)
City center Suburban Rural Village
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Micro Base Stations
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Pico Base Stations
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Distributed Antenna Systems (DAS)
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DAS Examples
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Distributed BTS Multi Operator –
Multi Technology DAS
Outdoor DAS forStadium
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Operator WiFi
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Femtocells
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Working bodies
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Architecture
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Protocol Stack
GTP-U
UDP
IPv4
S1AP/X2AP
SCTP
IPv4
Mgmt. Appl.
UDP/TCP
IPv4
S1-U & X2_U S1-MME & X2_C O&M
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Ethernet Layer 2
Ethernet Layer 1
Ethernet Layer 2
Ethernet Layer 1
Ethernet Layer 2
Ethernet Layer 1
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HeNB Architecture – 3GPP rel.9
3GPP TS 36.300
S1
MME / S-GW MME / S-GW
HeNB GW
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S1 S1S1
S1
X2 X2
X2 eNB
eNB
eNB
HeNBHeNBHeNB
E-UTRAN
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HeNB Architecture – 3GPP rel.9
Services
MME
MMEC Plane
HeNB GW
HeNB
HeNB
S1-MME
S1-MME
S1-U
-
S11
S11
SGi
Option 2:
Option 3:
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PGW
Internet
SGW
MME
HeNB
SeGWS1 C&U Plane
HeNB GW
S11
S5
SGi
Option 1:
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HeNB Architecture – 3GPP rel.10
3GPP TS 36.300
S1
MME / S-GW MME / S-GW
HeNB GW
MME / S-GW
S1
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S1 S1S1
S1
X2 X2
X2 eNB
eNB
eNB
HeNBHeNBHeNB
E-UTRAN
X2X2
S5
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HeNB Architecture – 3GPP rel.11
3GPP TS 36.300
S1
MME / S-GW MME / S-GW
HeNB GW
MME / S-GW
S1
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S1 S1S1
S1
X2
X2
X2 eNB
eNB
eNB
HeNBHeNBHeNB
E-UTRAN
X2X2
S5
X2
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HeNB – Home eNodeB
• In 3GPP terminology, LTE small cell = Home eNodeB
• The HeNB GW appears to the MME as an eNB.• The HeNB GW appears to the HeNB as an MME.• The S1 interface between the HeNB and the EPC is the same, regardless
whether the HeNB is connected to the EPC via a HeNB GW or not.• One HeNB serves onl one cell.
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• A HeNB hosts the same functions as an eNB, with the following additionalspecifics in case of connection to the HeNB GW:
• Discovery of a suitable Serving HeNB GW;• A HeNB shall only connect to a single HeNB GW at one time, namely no S1
Flex function shall be used at the HeNB.
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HeNB GW – Home eNodeB Gateway
• The TAC and PLMN ID used by the HeNB shall also be supported by theHeNB GW.
• Selection of an MME at UE attachment is hosted by the HeNB GW instead ofthe HeNB. Upon reception of the GUMMEI from a UE, the HeNB shall includeit in the INITIAL UE MESSAGE message; upon reception of the GUMMEI Typefrom the UE the HeNB shall also include it in the messa e if su orted and
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supported by the HeNB GW.
• Relaying UE-associated S1 application part messages between the MME
serving the UE and the HeNB serving the UE.• Optionally terminating S1-U interface with the HeNB and with the SGW.• Terminating non-UE associated S1 application part procedures towards the
HeNB and towards the MME.• Access control for UEs that are members of Closed Subscriber Groups (CSG)
is hosted by MME.
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HeNB access modes
HeNB Access Mode
Open Closed Hybrid
UE allowed accessto CSG
Access Access Preferential Access
UE not allowedaccess to CSG
Access No Access Access
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• Open access mode - subscribers of any PLMN, subject to roaming agreement.• Hybrid access mode:
- Its associated CSG members, and
- Subscribers of any PLMN not belonging to its associated CSG, subject to
roaming agreement.• Closed access mode - only users that belong to its associated.
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Architecture – NSN RL50FZ
MME / S-GW MME / S-GW
Flexi Zone Micro is a 1 cell microeNB. It is not HeNB.
HeNB can have output power ofup to 20dBm. (TR 36.922)
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S1 S1
S1
S1
X2X2
X2 eNB
eNB
eNB
eNB - FZMX2 eNB - FZM
E-UTRAN
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Flexi Zone Product Roadmap
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Flexi Zone Changing the Mobile Broadband Paradigm
4 x Flexi Zone BTS added for
capacity offloadFlexi Zone is a precision tool foradding mobile data capacity whererequired without the cost,constraints and environmentalim act of macro BTS
Flexi Zone is a discreet 4G small cell solutiondesigned to address the growing mobile datacapacity needs
Flexi Zone complements Macro BTSblanket coverage
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Macro
40W RFFlexi Zone BTS
0.25-5W RF
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Thank you!
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