Más contenido relacionado La actualidad más candente (20) Similar a AnyCell Connectivity - A New Era for Mobile Networks (20) AnyCell Connectivity - A New Era for Mobile Networks2. Radio Access Network Evolution
Fully IP-Oriented
1992
2
2003
2009
2011
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2013
3. Public Access Small Cells
Different small cell flavors and deployment scenarios
3
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4. From Remote Radio Head to Cloud-RAN
RRH
RRH
RRH
RRH
RRH
RRH
CPRI
CPRI
BBU
S1
RRH
RRH
RRH
X2
EPC
RRH
RRH
RRH
BBU
Pool
S1
X2
CPRI
CPRI
S1
BBU
Centralizing control for improved flexibility and efficiency
4
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EPC
5. Centralized vs. Distributed BBUs
• Benefits
• Challenges
•
Tight interference and
spectrum coordination
•
Low-latency, high bandwidth
connection
•
Highest spectral efficiency
•
•
Phase synchronization of
RRHs not required
CPRI needs to be transported
over fiber
•
Limited reach
•
Multi-radio LTE+WiFi small
cells not supported
•
Small footprint and simple
deployment
Fronthaul and backhaul will co-exist for RAN interconnection
5
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6. Evolution Towards Super Cells
more capacity
lower latency
more transparency
Mobile
Fronthaul
Centralized RAN
Mobile
Backhaul
AnyCell™
Connectivity
Super Cells
Next-Gen
Backhaul
more nodes
deeper network
more deployment options
Legacy RAN
HetNet
Connectivity for any protocol, capacity, size and topology
6
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7. Mobile Backhaul for Small Cells
7
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8. HetNet – Heterogeneous Networks
HetNet is fast becoming a reality to be supported by the backhaul network
8
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9. Small Cell Demarcation Challenges
• Environmentally hardened – outdoor deployment
• Ergonomically appealing – form, size and color
• Installation options – compliant to local planning requirements
• Security profile – more easy to gain access
Small footprint, light weight and high security
9
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10. End-to-End Service OAM
•
Critical for turn-up, assurance
and trouble shooting
•
Rich OAM implementation
enables high service availability
•
Standardized implementation for
seamless inter working
•
Turn-Up
Testing
Network
Maintenance
Trouble
Shooting
In-Service
Monitoring
Performance
Assurance
Tight performance constraints
require accurate measurement
FSP 150 provides rich service OAM consistent across the entire network
10
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11. Small Cell Backhaul
Small
Cells
FSP
Service Manager
Macro
Cell
Small
Cells
Evolved
Packet Core
Macro Cell Backhaul Network
Small Cell Backhaul Network
Leading to a deeper and more heterogeneous infrastructure
11
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12. Radio Access Network Synchronization
12
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13. Need for Phase Synchronization
•
Time Division Duplex mode
(TD-LTE)
•
Enhanced Inter-Cell Interference
Coordination (eICIC)
•
Uplink
Small cells enable more efficient
spectrum utilization
•
Downlink
Coordinated Multipoint transmission
(CoMP)
Challenge to synchronization architecture of today’s networks
13
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14. Mobile Backhaul Synchronization Needs
Application
Radio Interface
Backhaul
Frequency
Frequency
Phase
CDMA 2000
±50ppb
±3 to 10µs
GPS
GPS
GSM
±50ppb
n/a
±16ppb
n/a
WCDMA
±50ppb
n/a
±16ppb
n/a
LTE (FDD)
±50ppb
n/a
±16ppb
n/a
LTE (TDD)
±50ppb
±1.5µs
±16ppb
±1.1µs
LTE-A MBSFN
±50ppb
±1 to 5µs
±16ppb
±1.1µs
LTE-A CoMP
±50ppb
±1 to 5µs
±16ppb
±1.1µs
LTE-A eICIC
14
Phase
±50ppb
±1 to 5µs
±16ppb
±1.1µs
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15. RAN Synchronization Options
• Network-based timing distribution
•
ITU-T Synchronous Ethernet
Good long-term solution for hop-by-hop frequency distribution
•
IEEE 1588v2 – Precision Time Protocol
Favored solution for combined frequency and phase alignment
• GNSS-based synchronization
•
GPS or GLONASS
Global coverage with availability challenges
Combination required to meet precision and availability targets
15
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16. Syncjack™ Timing Distribution & Assurance
GNSS
FSP
Sync Manager
GNSS
PRTC
T-SC
APTS
mini-GM
Probe
T-GM
PTP
Grandmaster
Packet-Based Backhaul Network
T-SC
T-SC
T-SC
Local
Base Station
Remote
Base Station
Efficient and highly available synchronization of radio base stations
16
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18. CPRI Interface Protocol
Application
Channels
Antenna Configuration
CPRI Line Rate
WCDMA
4 x 5 MHz
1 sector, MIMO 2x2
1228.0 Mbps
LTE
20 MHz
1 sector, MIMO 2x2
2457.6 Mbps
WCDMA & LTE
1 x 5 MHz
20 MHz
3 sectors, MIMO 2x2
9830.4 Mbps
Scaling with technology, channel spectrum and radio sectors
18
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20. Access Link Monitoring for Fronthaul
Macro Cell
RRH
Small Cell
Small Cell
Small Cell
FSP
Service Manager
RRH
RRH
RRH
RRH
RRH
FSP 3000
ALM
Centralized
BBU Pool
Non-intrusive fiber monitoring and optical service assurance
20
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22. AnyCell™ Connectivity
Small Cell
(RRH)
Small Cell
(RRH)
Macro Cell
Hub Site
Small Cell
Macro Cell
Evolved
Packet Core
Backhaul and fronthaul efficiency for radio access networks
22
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23. Thank You
mritter@advaoptical.com
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