21-03-2011, 03:43 PM
PRESENTED BY
B.AVINASH
AVI.pptx (Size: 285.39 KB / Downloads: 71)
ACCESS GATEWAYS
HISTORY
The very first device that had fundamentally the same functionality as a router does today.
The idea for a router(called"gateways” at the time) initially came about through an international group of computer networking.
The first multiprotocol routers were independently created by staff researchers at MIT and Stanford in 1981
ARCHITECTURE
• A multi-homed device can act as a gateway that enables communication between the wired ad-hoc network and the infrastructured network as presented.
• IPsec provides Communication integrity and confidentiality between the gateway and the gateway client.
• In short, the gateway is just a router.
Access Network: The gateway can communicate with the infrastructured network through the access network.
Infrastructured Network: The infrastructured network is the Internet or an intranet. It is also possible that the infrastructured network and the access network are the same entity
CHOOSING THE GATEWAY SOLUTION
A 3G device can use its local 3G radio link to provide the gateway service to itself. When configured correctly, it can directly access both the ad-hoc network and the infrastructured network.
For example, if the devices are used in a foreign country, one of the devices might have a local USIM or SIM that enables Internet access at a moderate charge. Still, this solution is not very useful under normal circumstances.
GATEWAY SPECIFICATION
specification describes a gateway for ad-hoc networks
The business model of the gateway is shown in Figure
The gateway provides the DNS service and IP based access to the infrastructured network
GATEWAY SPECIFICATION
USER FUNCTIONS
Discover: The user discovers the available gateways.
Connect: The user connects to the gateway. This enables the DNS service and IP based access to the infrastructured network.
Disconnect: The user disconnects from the gateway.
Use DNS Service: The DNS service allows applications to resolve host names into IP addresses
GATEWAY PROVIDER FUNCTIONS
Start: The gateway provider starts the gateway. This allows other devices to discover the gateway and connect to it.
Stop: The gateway provider stops the gateway. This disconnects all connected devices and prevents devices from discovering the gateway
REQUIREMENTS
Functional requirements and nonfunctional
requirements.
Functional requirements are related to required functionalities.
Non-Functional requirements are related to the properties of the functionalities
FEATURES
B.AVINASH
AVI.pptx (Size: 285.39 KB / Downloads: 71)
ACCESS GATEWAYS
HISTORY
The very first device that had fundamentally the same functionality as a router does today.
The idea for a router(called"gateways” at the time) initially came about through an international group of computer networking.
The first multiprotocol routers were independently created by staff researchers at MIT and Stanford in 1981
ARCHITECTURE
• A multi-homed device can act as a gateway that enables communication between the wired ad-hoc network and the infrastructured network as presented.
• IPsec provides Communication integrity and confidentiality between the gateway and the gateway client.
• In short, the gateway is just a router.
Access Network: The gateway can communicate with the infrastructured network through the access network.
Infrastructured Network: The infrastructured network is the Internet or an intranet. It is also possible that the infrastructured network and the access network are the same entity
CHOOSING THE GATEWAY SOLUTION
A 3G device can use its local 3G radio link to provide the gateway service to itself. When configured correctly, it can directly access both the ad-hoc network and the infrastructured network.
For example, if the devices are used in a foreign country, one of the devices might have a local USIM or SIM that enables Internet access at a moderate charge. Still, this solution is not very useful under normal circumstances.
GATEWAY SPECIFICATION
specification describes a gateway for ad-hoc networks
The business model of the gateway is shown in Figure
The gateway provides the DNS service and IP based access to the infrastructured network
GATEWAY SPECIFICATION
USER FUNCTIONS
Discover: The user discovers the available gateways.
Connect: The user connects to the gateway. This enables the DNS service and IP based access to the infrastructured network.
Disconnect: The user disconnects from the gateway.
Use DNS Service: The DNS service allows applications to resolve host names into IP addresses
GATEWAY PROVIDER FUNCTIONS
Start: The gateway provider starts the gateway. This allows other devices to discover the gateway and connect to it.
Stop: The gateway provider stops the gateway. This disconnects all connected devices and prevents devices from discovering the gateway
REQUIREMENTS
Functional requirements and nonfunctional
requirements.
Functional requirements are related to required functionalities.
Non-Functional requirements are related to the properties of the functionalities
FEATURES