Hughes AB9400 Advantages For 2/3G Cellular Transmission
December 2005
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AB9400 Product Overview
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AB9400: Point-to-Point and PMP on One Radio Platform
Point-to-Point and PMP use the same equipment and are managed by the same EMS
All Hughes advantages apply:– Frequency reuse, even adjacent channels– Frequency changes on-the-fly– Mix of traffic E1, ATM, IP
Key benefits: leverage common training, sparing, network management, etc.
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Key Features
Low startup investment with single sector HT Linear expansion: match investment with revenue Low operational costs: automatic installation, etc Highest efficiency with 16-QAM Flexible architecture: ATM, TDM and IP transport with QoS
(Flexible bandwidth control) Optimized for cellular backhaul IP/LAN for SMEs Long Range: 5.7km for 99.99% Rain zone K Carrier grade EMS (Sun-Unix)
Bottom line: lowest CapEx, lowest OpEx
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HubS1 Low speed (QPSK) bursts Longer range
High speed
(QAM) bursts
S2Close in
customers
High Spectral Efficiency with Multi-Modulation
Higher capacity using 16-QAM: 30 Mbps– 3.2 bps/Hz (2.4 bps/Hz payload)
Higher range and availability using QPSK: 15 Mbps – 1.6 bps/Hz (1.2 bps/Hz payload)
Hub radio supports remotes using both modes (slot by slot), optimizing system capacity and range
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G-24870 C06/25/02
HUB
QPSK
16-QAM
A
B
C
D
E
F
G
A A F CD G G EGTDMABursts
16-QAM QPSK
Hughes’ Patented Multi-Modulation Optimizes Range and Capacity
AB9400 Hub/Base Station Supports Terminals with 16QAM and QPSK Simultaneously on a site-by-site basis
DBAThe HT is the controller of the DBA algorithm.
The HT assigns timeslots based on demand and priority as defined by the QoS parameters on a per VP/VC basis.
Each RT can receive up to the full air bandwidth.
Hub
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24.5 GHz 25.445 GHz 25.557 GHz 26.5 GHz
1,008 MHz FDD spacing
896 MHz
64 Channels of 14 MHzDownlink
896 MHz
64 Channels of 14 MHzUplink
ETSI 26 GHz Band
AB9400 26/28 GHz Channel Plans
27.5 GHz 28.4445 GHz 28.5565 GHz 29.5 GHz
1,008 MHz FDD spacing
896 MHz
64 Channels of 14 MHzDownlink
896 MHz
64 Channels of 14 MHzUplink
ETSI 28 GHz Band
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Hughes AB9400 Advantages
TDMA architecture is more economical than FDMA, lower capex and opex
– AB9400 “first-link cost” [initial base station and one remote terminal] is similar to point-to-point microwave price
– AB9400 Base Station has ATM, NxE1, + 100BaseT interfaces, permitting migration of traffic from E1 to ATM to IP with no hardware swapout
Higher Remote Terminal capacity – Some FDMA products limited to 8 Mbps/4xE1– AB9400 Remote Terminal supports 4-12 E1s, up to 29 Mbps ATM throughput,
20-30 Mbps IP throughput AB9400 TDMA system allows dynamic bandwidth allocation (DBA)
among multiple Remote Terminals– DBA is vital for concentrating backhaul traffic from HSDPA/UMTS cell sites,
allows oversubscription of 3G data carriers, reduces transmission costs at cell sites and upstream
– FDMA systems cannot share bandwidth among remote terminals AB9400 has more robust ATM and IP services & features
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4-Sector Hub for 24 Remotes
FDMA Base Station
TDMA Base Station: Lower Capex & Opex
24 FDMAModems
4 TDMA Radios(120 Mbps Capacity with 4
Radios in 1/3 Rack
FDMA Hub/Base Station:• Multiple module types & multiple modules per radio • Requires additional modem for each Remote Terminal • Requires site visit to add/configure modem for incremental Remote Terminal• Range decreases as Remotes are added to multi-carrier transmitter
Hub/Base Station Costs
TDMA Hub/Base Station:• Only one module (circuit pack) per radio • Each radio supports >16 Remote Terminals• No hub site visit required for incremental Remote• Number of remotes does not affect range with single-carrier TDMA
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AB9400 Superior Redundancy
HT IDURT IDU
12xE1 12xE1
Protection available for ATM, IP, and E1 interfaces at hub/base stations and remotes Hub radios can be 1:0, 1:1, or 1:N redundant Remote radios can be 1:0 or 1:1 protected
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TDMA Enables Active Redundancy for Hub/Base Stations
Backup hub radio transmits test burst in maintenance time slot– Remote Terminals report signal strength of primary and backup radios
– Alarm generated for backup unit failure or degradation
Continuous “Active Redundancy Testing” avoids switchover to failed backup units, reduces system outages
FDMA systems not capable of active redundancy
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2/3G Capacity Requirements
Source: GSM Mobile Transmission Conference Presentations April 2005
Cell site with 2G+3G will require 5-10 E1s– AB9400 Remote Terminal equipped with 4, 8, or 12 E1s– About 40 percent of Hughes PMP deployments for cellular operators
are 8xE1 or 12xE1 RTs today– Some PMP suppliers offer maximum 4 E1s, not sufficient for large
cells or 2+3G cells
Backhaul RequirementSOURCE Cell Site Type No. E1s Mbps
Mobile OperatorHutch "3" UK 3G & HSDPA 6-8 14SFR France 2G/3G/HSDPA 5-6 12
Microwave SupplierEricsson 2G/3G/HSDPA 6-10 16
Nokia 3G & HSDPA 5 10Stratex Node B 2007 8 16
Average 6.8 13.6
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9400 Hub Terminal High Performance and High Functionality
Outstanding operational performance– TDMA Multi-Mode Modulation: QPSK and 16 QAM
• 30 Mbps payload (2 bit/Hz) Physical interfaces
– a) STM-1/OC3c ATM – b) 12xE1 TDM + 100BaseT– c) 100BaseT only
Frequency Bands– ETSI 26 GHz– ETSI 28GHz
Scalable– Single sector (one HT)– Large Hub
Frequency change ‘on the fly’
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Azimuth angle (deg)180-180 0
0 dB
-10
High-performance sector antenna at the hub increases capacity.
Typical horn antenna
AB9000 Antenna
Wasted capacity
Spectrum Efficiency
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9400 Remote TerminalHigh Performance and High Functionality
Outstanding operational performance– TDMA Multi-Mode Modulation: QPSK, and 16 QAM
• Up to 30 Mbps user payload in 14 MHz
Physical interfaces– NxE1 + 2x10/100BaseT– N=2,4,8– E1s are TDM or ATM/IMA– STM-1 ATM
QuickVisitTM Installation– Single coax IFL– 300mm (half-depth)
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PMP Range
Rain attenuation is the limiting factor for range
Rain Zone K
Nominal system parameters, 60cm antenna, 10-6 BER, 99.99% Availability, 26GHz
1km
3.9 km
6km
16-QAM QPSKRain Zone K
3km
5.7 km
2km 4km 5km
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PMP Range
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AB9400 Advanced Features
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PTP Link
Unparalleled system flexibility
Hub
ODU
• Flexible Antenna Configurations
• 90o,,180o , 2x180o, PTP
• 1 antenna, 2 antenna
• Flexible Antenna Configurations
• 90o,,180o , 2x180o, PTP
• 1 antenna, 2 antenna
Remote
90o PMP Sector
Splitter
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Unparalleled system flexibility
Hub
ODU Splitter
Remote Terminal
• 2x180o with 1 channel 30Mbps
• ‘4-sector coverage’ with 1 radio
• 2x180o with 1 channel 30Mbps
• ‘4-sector coverage’ with 1 radio
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Unparalleled system flexibility
HubODU
Remote Terminal
Coupler
ODU
Backup Hub
• Stackable Base Stations
• Redundancy, added capacity
• Flexible Antenna Configurations
• 1 Antenna with 2 ODUs
• Stackable Base Stations
• Redundancy, added capacity
• Flexible Antenna Configurations
• 1 Antenna with 2 ODUs
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2G+3G Backhaul
ATMNxE1
2G
CoreBackhaul
G-25106 P09/09/02
UMTS RNC
PMP Hub
UMTS NodeB
AIReach RTNxE1 TDM
ATM Air Interface with
ATM QoS
TDM: NxE1 ATM: E3 or STM-1IP: 100BaseT
BSC
NxE1
NxE1
ATM DS3
2G+ 3G over NxE1 TDM NxE1
TDMTDM
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Hub Site (ATM)
• 1 to 4 Sectors, 1+1 Redundant
ATMSwitch
HT - 1 Backup
HT - 1
STM-1/E3 ATMHub Site
HT - 4 Backup
HT - 4
SDH or PDHCore
ATM Switch
Data Center
STM-1/E3 ATM ADM
ADM
STM-1
STM-1
LAN HubLAN
10Baset T to each HT
The Hub architecture is a scalable architecture.
HT radios are added when additional capacity is required.
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Hub Block Diagram
Ethernet Switch
Ethernet
Hub
The same HT supports all 3 modes at the same
time
IP CoreBackhaul
ATM Switch
ATM
HT
HT ATM CoreBackhaul
TDMSwitch
12xE1
TDM CoreBackhaul
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2G+3G Backhaul
ATMNxE1
2G
CoreBackhaul
G-25106 P09/09/02
UMTS RNC
PMP Hub
UMTS NodeB
AIReach RTNxE1 TDM
ATM Air Interface with
ATM QoS
TDM: NxE1 ATM: E3 or STM-1IP: 100BaseT
BSC
NxE1
NxE1
ATM
2G+ 3G over NxE1 TDM
E1ATM/IMA
3G ATM Interface
O&M UBR PVC
Voice VBRrt PVC
Data VBRnrt (future)
3G ATM Interface
O&M UBR PVC
Voice VBRrt PVC
Data VBRnrt (future)
2G over NxE1 TDM
3G over ATM(E3/DS3 PDH or
STM-1 SDH)
ATM
STM-1
ATMATM
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Future All-IP Backhaul
Ethernet CoreBackhaul
RNC
PMP Hub
3G BTS
AIReach RTNxT1 TDM
Air Interface with QoS
IP: 100BaseT
Ethernet
EthernetEthernet
All IPAll IP
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WiFi Application
Enables superior WiFi performance – Provides 50x the rate of 600kbps DSL– DBA allows bw sharing
WiFi Backhaul– Data is kept secure– Data is kept separate from other
traffic
Hot Spot10/100BaseT
WiFi AP
RT
Backhaul
Cellular backhaul and WiFi can be supported at the same time.
Cellular backhaul and WiFi can be supported at the same time.
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Terminal/RT Ethernet Interface: IP Performance
124 bytes 1,500 bytes
100kbps
7.8 Mbps
30 Mbps
HUGHES IP Performance
Full Duplex
Typical PMP IP Performance
3 Mbps
Vendor AVendor B
IP Packet Size
Throughput
Most vendors’ actual IP throughput is far less than claimed – very dependent on packet size!
20 Mbps
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AB9400 Best-in-Class IP, QoS, and Prioritization AB9400 HT supports >1,000 VCs, Remote Terminal supports
>250 VCs AB9400 supports all ATM QoS categories: CBR, VBR-rt, VBR-nrt,
CBR, UBR, UBR+ AB9400 supports four levels of IP QoS [matching ATM
categories] IP packet priority can be based on DiffServ TOS or VLAN ID AB9400 HT and RT provide VLAN tagging and untagging for 3G
and other applications AB9400 HT supports up to 64 VLAN IDs, RT up to 16 FDMA systems provide limited ATM support (typically CBR only,
limited connections/VCs per LAN port, limited QoS levels per LAN port/VC, limited VLAN support
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AB9400 with Up/Downlink VLAN Tagging
Unique VLAN tagging feature for 3G TD/CDMA operator
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3G Requires ATM Today
FDD UMTS + HSDPA = ATM Transport
NxE1 IMA
E3 or STM-1 ATM E3 or STM-1 ATM
Today’s 3G Node B requires ATM transport:– FDMA Base Station requires external mux to aggregate E1s with IMA onto
E3 or STM-1 [extra capex & opex]– AB9400 Base Station/Hub multiplexes ATM traffic from multiple Remote
Terminals onto E3 or STM-1 ATM channel– Some FDMA Remote Terminals limited to total throughput of 8 Mbps [4xE1
or 8 Mbps of LAN]– AB9400 Remote Terminal supports total throughput of 30 Mbps [4-12xE1,
plus E3 or STM-1 ATM, plus 10/100BaseT]
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Future 3G Cells Will Require IP
TDD UMTS, Future HSDPA Overlay = IP Transport
ATM
3G migrating to IP transport: TDD UMTS today – T-Mobile Czech, Orange Slovakia, etc. Future HSDPA overlay base stations 3G cells with 2-4 Mbps user traffic per sector, need 6-12 Mbps backhaul
– FDMA Base Station requires expansion unit for IP traffic [extra cost]– Every AB9400 Base Station/Hub radio today supports 100BaseT interface for IP
traffic– FDMA Remote Terminal limited to maximum 8 Mbps [insufficient capacity]– AB9400 Remote Terminal supports total throughput 20-30 Mbps IP traffic
depending on packet size
10/100BaseT100BaseT
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Спасибо! Спасибо!
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