Geographic Messaging Service
Encyclopedia
Geographic Messaging Service, or GMS in short, is a new form of messaging for cell phones. It is a message associated with a geographic region that is delivered to a subscriber when they are in that region. This form of messaging extends traditional Short Messaging Service
Short message service
Short Message Service is a text messaging service component of phone, web, or mobile communication systems, using standardized communications protocols that allow the exchange of short text messages between fixed line or mobile phone devices...

 (SMS) and Multimedia Messaging Service
Multimedia Messaging Service
Multimedia Messaging Service, or MMS, is a standard way to send messages that include multimedia content to and from mobile phones. It extends the core SMS capability that allowed exchange of text messages only up to 160 characters in length.The most popular use is to send photographs from...

 (MMS), by allowing subscribers to leave and receive SMS or MMS where they matter. Similar to SMS and MMS, GMS can be the vehicle for peer-to-peer communications—for example, someone leaving a shopping list around the store as a reminder—as well as for other content and marketing services. For example, a tourist organization can leave tidbits about interesting locations in New York City and have them delivered to visitors when they are nearby those locations. And, a store can send coupons over GMS just to those subscribers that are in the vicinity of the store.

The technology underlying GMS is called GeoFencing—detecting when a cellphone crosses a virtual geographic fence. The term GMS was coined by researchers at Bell Laboratories.
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