By Martin Dawson, James Winterbottom, Martin Thomson
In modern day immense international of world trade with clients which are extra nomadic than ever, the necessity for trustworthy, safe, and effective entry applied sciences is quickly expanding. IP situation offers you a guided travel of position decision, tackling this new know-how head on and addressing all elements of place administration, supply, and conveyance inside IP networks. protecting very important real-world functions comparable to emergency (911) providers, asset monitoring, name routing, navigation, and employees situation in sizzling table environments, this publication provides all of the details you want to totally help this state of the art expertise. * find out how position info is produced, transported, and fed on on the net * comprehend the semantics and constructs of the HELD and FLAP protocols * realize the 3 roles of the presence version - presentity, presence provider, and watcher * discover how the entry place Entity (ALE) is helping ensure situation inside certain types of networks * research intimately the positioning details Server (LIS) together with its differing types and interfaces * make sure IP situation for units attached to every kind of networks together with WiFi and WiMAX * Get info on situation selection and acquisition ideas for residential broadband networks equivalent to DSL and cable * know about privateness controls and issues for web place
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Extra info for IP Location
Although the Target is usually a person, it is often the Device that is used when a location is determined. Most methods for location determination work for devices, not people, but usually the assumption is made that the person and their device are in close proximity. The location of the Target can be determined directly, but this is more of an atypical situation. The Location Generator determines the location of the Device or Target. The GEOPRIV model doesn't describe how this is done, but thousands of options exist, some of which are described in this book.
While Bob may not have made a conscious decision, he has somehow decided that Alice is allowed to receive this information, so he has also assumed the role of Rule Maker. Alice is the Location Recipient; she is the user of the location information. There is no Device in this example because the Location Generator has directly determined the location of the Target. A GPS Application Assume now that Bob has a mobile phone which contains a GPS unit. He uses an application on this phone that first determines his current location then sends this to a web site that displays a map showing the nearest cinema.
Location then becomes part of the presence of the Target. 4. Watchers for this information subscribe to the presence service for the Target, which now includes location information. They can do this without prior knowledge of the Location URI or the LIS. Combining location information with other presence information has the advantage of enabling existing presence tools for use with location. When this is enabled, Watchers don't need to be individually given location information or a Location URI, they can use a known presentity to request location information as they see fit.