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Microsoft MapPoint Location Server "Attention-focuses" Mobile Devices

  • July 2, 2004
  • By Jonathan Lurie
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What Is MapPoint Location Server?

MapPoint Location Server (MLS) is software that will make your cell phone locatable! But before you start screaming foul and making references to George Orwell's 1984, read the rest of this article. Microsoft is currently working with cellular operators such as Sprint, Bell Mobility Canada, and other as-yet-unnamed cellular companies to integrate Microsoft Location Server. The other cellular companies were unnamed to me but my secret sources indicate that ATT (AT&T?) may well be on its way to having its MLS plugin online soon. You didn't hear it here. Well, yes you did but you can't quote me on it!

Anyhow, for these cellular operators to work, an MLS plugin must be implemented. The plugin allows these cellular operators to offer a new (optional) service to their subscribers: locatable cell phones, which can act as honing beacons. So when Steve, Microsoft's MapPoint Location Server guru, runs the service on his phone, authorized users can ask "where's Steve?" Where the hell is Steve anyway? Let's see where he's peddling his "wares".

MLS enables users to know Steve's approximate location, assuming Steve's cell phone has not been lost or stolen. I say approximate because it depends on how the cellular operator implements the tracking. Some operators will use assisted GPS (APGS), which can result in very accurate approximations (30 feet or less). Others will use the nearest cell phone tower, which can result in less accurate approximations (could be as far as a mile).

The uses for MLS are practically innumerable, although I hope we don't see parents surgically implanting cell phones into their children's bodies to serve as tracking devices. Let's keep those surgically implanted foreign objects as small as possible, or avoid them altogether!

How It Works

MLS is a component of Microsoft's MapPoint Web Service (MWS). MWS licensing enables businesses to locate their "assets." Although primarily used for tracking cell phones, MLS could easily track pagers (does anyone still use pagers?) and other devices as well.

Once installed, a developer can issue queries against the MLS using a set of Web services (Step 1). The query includes an "asset" identifier associated with a user's Windows account. When a user is provisioned in MLS, his or her cell phone number, for example, is associated with the user's Windows account and stored in the MLS SQL DB. The query from the developer contains the account name (Windows) of the user to be located, and MMLS looks up the phoned number and sends that to the operator.

MapPoint Location Server would in turn query the cellular operator (Step 2) configured for the specific asset identifier (for example, Sprint). Remember that a business might have hundreds of locatable assets, and each can exist on a different cellular operator. The operator then locates the asset and returns its geographic latitude and longitude (Step 3). At that point, MLS could notify the asset (Step 4) that its location is being queried (an option configurable by the asset owner) and then return the latitude and longitude to the requestor. The requestor probably would want to display the location on a map, which it could render by using MapPoint Web Service (Step 5 & 6).



Click here for a larger image.

Out of the box, users can use MLS to locate themselves, their buddies, and any nearby MWS point-of-interest (POI) locations. (A POI could be a gas station, restaurant, and so forth) On the development side, with a little customization work to the software, Microsoft's MapPoint Web Service can also provide useful information such as which phone out of a group of phones is nearest a certain location, how far apart two addresses are, directions for getting from point A to B, and so on.





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