doc: update overview.txt: add gps / gnss

add GPS/Location Services feature information

diff --git a/doc/overview.txt b/doc/overview.txt
index 1924875..c93d1ec 100644 (file)
--- a/doc/overview.txt
+++ b/doc/overview.txt
@@ -145,6 +145,14 @@ Current implemented features:
                supplementary service control string and user/network initiated
                unstructured supplementary service data (USSD).
 
+       GPS/Location Services
+
+               oFono provides a Location Reporting interface that enables
+               taking advantage of on-board GPS capabilities of modern modems.
+               oFono also provides an Assisted Satellite Navigation interface
+               that allows feeding assistance data to the GPS unit from the
+               network as well as E911 services.
+
 Work in progress features:
 
        GPRS