Internet Access to a Home Area Network

Short Description
Ahome area network could control many devices, all of them working together to keep your home comfortable, entertaining, and safe. But if you go out of town, you cannot watch the closed-circuit security camera you installed so that your bicycle might not get stolen— again. Secure Internet access to a home area network would let you use a Web browser or even a Web-enabled phone to control the central heating equipment, set a VCR to record TV programs, turn off an appliance that was accidentally left on, or even view snapshots from a surveillance camera.

Website: www.cag.csail.mit.edu | Filesize: 276kb
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Content
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AutoHan devices normally use the universal plugand- play (UPnP) generic event notification architecture (GENA)4 to send and receive events over the network via event streams based on HTTP or HTTPUDP (user datagram protocol). GENA extends HTTP by adding three new methods: SUBSCRIBE, UNSUBSCRIBE, and NOTIFY. Devices can, therefore, implement a subscription arbiter, which is rather like a Web server.
Subscription arbiters, which manage subscriptions for event notifications, are used by devices that monitor or control the network, such as the Auto- Han event engine. The events are generated by a wide variety of hardware devices and software entities, not all of which are compatible with AutoHan. Our prototype implementation meets this challenge by using device proxies to convert other forms of event to the GENA format. GENA defines a notification type (NT) and a notification subtype (NTS), both of which must be uniform resource identifiers (URIs). In AutoHan, the NT specifies the type of notification the subscriber requires, and the NTS gives the parameters of the event when notified by the subscription arbiter.
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