An example of System Implementation of Broadband Wireless Access in Japan
Broadband Access by “Fiber + Radio” -WIPAS (Wireless IP Access System)Septe...
An example of System Implementation of Broadband Wireless Access in Japan
Broadband Access by “Fiber + Radio” -WIPAS (Wireless IP Access System)September 10th, 2004
Kazuhiko INOUE
NTT Access Network Service Systems Laboratories
Contents
-Overview of Wireless Access and Broadband Services -Broadband Access by “Fiber + Radio”: WIPAS -Characteristics of WIPAS -Examples of Broadband Services by “Fiber + Radio” 2
Classification of Wireless Access Systems Network Service System
? FWA (Fixed Wireless Access) … ex. Broadband Access by “Fiber+Radio” ? NWA (Nomadic Wireless Access) … ex. “Hot Spot” service ? MWA (Mobile Wireless Access) … ex. Cellular phone ? Radio LAN … ex. RLAN for office (indoor) ? Wireless Home Link … ex. RLAN for home user, Bluetooth
Customer System
ISP
Areal deployment
NTT central office
MWA
Internet Mobile applications
Internet café
Node Equip.
Radio LAN
NWA
FWA
Portable Customer’s premise equipment AP
Public Network
WT
AP
RLAN
(still-use)
AP
Public space
Spot deployment STB TV
LAN AP
Office building
AP
WT
PBX
LAN
AP: Access Point WT: Wireless Terminal
radio link
Game Machine PC
Wireless Home Link
Broadband Service Market in Japan (million)
10
10.27 (’03.12)
Amount of subscribers
HFC (CATV) 1
2.48 (’03.12) ADSL
0.1
FTTH
0.89 (’03.12)
0.01
0.001
’ 00.06
’ 00.12
’ 01.06
’ 01.12
’ 02.06
’ 02.12
’ 03.06 ’ 03.12
Broadband Access by “Fiber+Radio” Broadband Wireless Access, compatible speed to FTTH …Fiber Optic Cable + WIPAS (Wireless IP Access System) Residential area
Radio
Urban area
Fiber
IP network Hub Station
WIPAS: Wireless IP Access System WIPAS is the Broadband FWA (Fixed Wireless Access) system that consists of AP (Access Point) and WTs (Wireless Terminal) employing upper SHF: 26GHz band. Transmission rate of the wireless section is 80Mbit/s (Maximum transmission rate of Ethernet is 46Mbit/s ), which is shared among the plural WTs. Installation at veranda
WIPAS System Design Concept Conventional Systems (mainly for Business users)
(1) Services Telephone / Leased line/(IP)
WIPAS
(for SOHO/Consumer users)
Focus on IP Services
(2) Transmission Range A few kms
Up to 1 – 2 km (in Japan, climatic zone K)
(3) Installation Site of AP Building Rooftop /Tower
Telephone Pole
Technical Specifications of WIPAS …conformable to ARIB STD T 58( P-P) / T 59 ( P-MP) Frequency Band Communication Scheme Symbol Speed Modulation Scheme Wireless Transmission Speed (Maximum forward rate of Ethernet frame)
Transmission Power Maximum Number of Subscriber Network Interface User Interface Antenna Gain
Access Point (AP) CPE (WT)
Transmission Range Bandwidth Control
26 GHz band TDMA/dynamic TDD 20M Symbol/Sec Adaptive Modulation (16QAM/QPSK) QPSK: 40 Mbps (23 Mbps) 16 QAM: 80 Mbps (46 Mbps) QPSK : 14dBm 16 QAM : 11.5 dBm 239 Subscriber Stations per Access Point 100 Base-TX or 100 Base-FX (Interactive service can be attained by one optic fiber)
100 Base-TX or 10 Base-T Horn Antenna (5.5 dBi) Omni Directional Antenna (6 dBi) 18cm Flat Antenna (31.5dBi) 1-2 km (Line of Sight) -Fairness Queuing Control by Round-robin -Minimum Bandwidth Grant by Priority Queuing
Overview of WIPAS Equipment Customer’s premise
AP-RFU
Ethernet cable (*)
Omni-type
Horn-type
Telephone pole
Power cable PC
Size: 150φ x 600 mm, 260φ x 120 mm Weight:7 kg (omni-type) 3 kg (horn-type)
Ethernet cable
Optical fiber cable
WT-adapter
Size: 90 x 40 x 36 mm Weight: 0.1 kg
WT-RFU
AP-IFU
Size: 190 x 190 x 55 mm Weight: 2.0 kg
Size: 270 x 320 x 160 mm Weight: 14 kg
AP: Access Point WT: Wireless Terminal RFU: Radio Frequency Unit IFU: Interface Unit
(*) Vacant cores within Ethernet cable are used for power supply to WT.
Variations of System Configuration - P-P access line / entrance line IP network
WT
WT
IP network
WT
AP
WT
WT
- P-MP cascading
WT
AP AP
IP network
WT/AP Installation Images Veranda railing
Concrete fence
Indoor (window glass)
W T
Dedicated pole
A P
Common pole
Building rooftop
Examples of Broadband Services by “Fiber + Radio” - Suburban redidential areaDense deployment in Haramachi city • designed to have more than 80 % LOS with premises in the cell
Radio WT
Satellite antenna
Fiber 10 km
8 km
Installed AP at suburban residential area
AP-RFU
AP installed at a park in residential area.
Aerial view of residential area
AP-IFU
Examples of Broadband Services by “Fiber + Radio” - Urban redidential spotSpot deployment at apartment houses • fiber construction problems due to architectural limitations
Share connection of up to 46 Mbps download and up to 32 Mbps upload
Radio 100BASE-TX /10BASE-T
Duct hole of air-conditioner
FWA Antenna
AP
Fiber
Veranda etc.
Subscriber equip.
Telephone pole etc.
Apartment house, multi-use building etc.
Installed Equipment at urban spot area (1) AP( Installation height: 8-10m) RFU IFU
(2) WT
Examples of Broadband Services by “Fiber + Radio” - NWA/RLAN Backhaul Radio
WIPAS AP
RLAN PDA
WIPAS AP is installed at the point that can keep line-ofsight between AP and WTs.
PC RLAN PDA
Fiber
WIPAS WT
PC RLAN
Example of installation on a tree
PDA
PC
Power is supplied from nearby 100VAC or portable power generator.
RLAN AP Box
NWA/RLAN
WIPAS
Required Technologies for Higher Speed “Fiber + Radio” FWA Background · Digital broadcasting services has been started in 2003 in Japan. · Last-one-hop problem is still essential.
Key technologies
High speed ( >100 Mbit/s)
· Frequency resource management · Multi-level modulation · Selected beam antenna · Transmitter power problem · Higher efficiency for MAC
Summary -Broadband Access by “Fiber+Radio” may be useful concept for deploying of Broadband Wireless Access Network. -FWA systems using upper SHF band (for example: 26GHz band) can be introduced in Broadband Access Sevice Network effectively. -Higher speed capability of FWA will be also required as complement for FTTH in the future.
