Transcript Document

Open Networks - Session I
Introduction to Open Networks and
WLPR.NET
Matti Juutilainen
[email protected]
Lappeenranta University of Technology
Communications Engineering
Agenda
• The evolution of wireless LANs
• WLAN network models & comparison
• Wireless Lappeenranta network model
WLpr.net
• Influences of open networks
• Conclusions
The Evolution of Wireless LANs
Wireless ISP network
Closed
Access
Network
Company
Closed
Access
Network
ISP
Closed
Access
Network
ISP
ISP network
Company
Intranet
Internet
+ manageable, easy planning
– high building costs, interference
– closed, limited possibilities
– roaming requires co-operation
The Evolution of Wireless LANs
Community network
ISP
ISP
Community Network
ISP
Internet
ISP
ISP
Community network
+ likely to spread, lots of users
+ shared building costs
+ public, wide possibilities (users, services, …)
+ easy roaming
– hard to manage
– difficult to plan (access point locations)
– coverage area
– Internet-access?
The Evolution of Wireless LANs
Public multi-ISP network
Company
Company
Intranet
Open
Access
Network
Operator
Interface
ISP
Internet
ISP
Lappeenranta Model
+ manageable, easy planning
+ low building costs, less interference
+ public, wide possibilities
+ easy roaming
+ lots of users
+ local services
– complex user routing and authentication
WLAN Network Models
PUBLIC MULTI-ISP
StockholmOpen.net
WLPR.NET
Jippii
WLAN
Seattle
Wireless
TeliaSonera
HomeRun
COMMERCIAL
BAWUG
COMMUNITY
Comparison of WLAN
Network Models
PUBLIC MULTI-ISP
StockholmOpen.net
WLPR.NET
Jippii
WLAN
Seattle
Wireless
TeliaSonera
HomeRun
COMMERCIAL
BAWUG
COMMUNITY
Commercial
networks
Community
networks
StockholmOpen.net
WLPR.NET
Access network
Closed access
Public hot spots
Public access
Public access
Goals
Get customers,
provide Internet
Provide Internet
& local links,
get rid of ISPs
Provide a public
access system
Commercial potential
Very high
Low
High
High
Costs to end user
High
Low
Low
Low
Operating reliability
High
Low
High
High
Network manager
ISP
Private people
Neutral admin
(& private people)
Neutral admin
(& private people)
Provide a public
access system with
local services
Wireless Lappeenranta Network Model
A centrally managed, public regional network infrastructure
Anonymous
Service
Providers
Operator Neutral
Access Network
Registered Service
Providers
Users
Operator Interface
Service
Interface
Services to be
offered in the
regional
network
Network services
Gateway 1
Gateway 2
Gateway 3
Gateway 4
- DHCP server
- User identification
- Domain Name Server
- WWW Server
…
- WWW Proxy
- WWW Server
- Firewall
- Log-file collection
…
- NAT (optional)
- Log-file collection
…
- NAT (optional)
- Log-file collection
…
- NAT (optional)
- Log-file collection
…
ISP’s server
ISP’s server
ISP’s server
- Authentication
- NAT (optional)
- Authentication
- NAT (optional)
- Authentication
- NAT (optional)
ISP
ISP
Internet
Company
…
…
…
Company
Intranet
Wireless Lappeenranta Network Model
A centrally managed, public regional network infrastructure
Internet
ISP 3
Operator Interface
ISP 2
WWW Server
Database
(MySQL)
Syslog
Name Service
Other Common Services
Database Client
Middleware (taild)
DNS
NTP
FIREWALL
DHCP
Server
PHP
Radius
Server WWW Server
FIREWALL
ISP 1
Access Controllers
Redirector
Source
Routing
HTTP Cache
FIREWALL (IP/MAC)
WWW Server
FIREWALL (IP/MAC)
FIREWALL (IP/MAC)
Operator Neutral Access Network
Wireless Lappeenranta Network
• http://www.wlpr.net/
Influences of Open Networks
• Local influence
• Influence on
–
–
–
–
–
Internet Service Providers (ISPs)
Service providers
End users
City and the local area
Network manager
Conclusions
• WLAN networks are affordable and popular for the
last mile.
• WLAN technology is not yet mature
– Need for speed, reliability, security, range, lower costs,
interoperability, QoS etc.
• Also other competing/supporting wired network
technologies (Fiber, Ethernet, …)
• New network models are emerging
– Community networks
– Public multi-ISP networks
• Demand for public and affordable local networks.
Conclusions
• Commercial usability is vital.
• Different network options:
– Commercial single-ISP networks
• Advantageous only for the ISPs?
– Community networks (Seattle Wireless etc.)
• Commercial usability/reliability?
– Public access systems
•
•
•
•
StockholmOpen.net
Wireless Lappeenranta
HelsinkiOpen.net
Regional networks
• In practice, most of the networks are a combination of
previous options.
Conclusions
• Publicity will be in a key role
– Public access networks will be strong.
– Publicity offers new opportunities for everyone
•
•
•
•
•
Internet Service Providers (ISPs)
Service providers
End users
Neutral network manager
City and the local area
• Need for services and content!
Thank you!
Questions?
[email protected]
EXTRA TRANSPARENCIES
Open Multi-ISP Network Models
Internet
ISP 1
ISP 2
Internet
MAC
DB
ISP 1
DHCP
Relay
ISP 2
DHCP
DHCP
Operator Neutral Open Access System
StockholmOpen.net
Local services
(DHCP, DNS, login,
DBs, positioning, maps,
guidance, games, …)
Source based
user routing &
HTTP Cache
Operator Neutral Open Access System
WLpr.net
(Wireless Lappeenranta Network Model)