RFC 2009 (rfc2009) - Page 3 of 27
GPS-Based Addressing and Routing
Alternative Format: Original Text Document
RFC 2009 GPS-Based Addressing and Routing November 1996
o Providing contiguous information services for mobile users
when information depends on the user's location. In
particular providing location dependent book-marks, which
provides the user with any important information which
happens to be local (within a certain range) possibly
including other mobile servers.
The solutions which we present are flexible (scalable) in terms of
the target accuracy of the GPS. We also discuss cases when GPS cannot
be used (like inside buildings).
The main challenge is to integrate the concept of physical location
into the current design of the Internet which relies on logical
addressing. We see the following general families of solutions:
a) Unicast IP routing extended to deal with GPS addresses
b) GPS-Multicast solution
c) Application Layer Solution using extended DNS
The first two solutions are presented in this memo. We only sketch
the third solution.
1b. General Architecture
We will assume a general cellular architecture with base stations
called Mobile Support Stations (MSS). We will consider a wide variety
of cells, including outdoor and indoor cells. We will discuss both
cases when the mobile client has a GPS card on his machine and cases
when the GPS card does not work (i.e. - inside buildings).
We will assume that each MSS covers a cell with a well defined range
specified as a polygon of spatial coordinates and that the MSS is
aware of its own range.
1c. Scenarios of Usage and Interface Issues
Below, we list some possible scenarios of usage for the geographic
messaging.
Consider an example situation, of an area of land near a river.
During a severe rain storm, the local authorities may wish to send a
flood warning to all people living within a hundred meters of the
river.
Imielinski & Navas Experimental