In an IP-based cellular wireless communication system, systems and methods for
spatially controlling cellular phone usage are provided. Entry of a cellular phone
device into an area of restricted phone access ("quiet zone") is detected and an
IP message identifying the phone sent to a central facility. In one embodiment,
an IP message is sent to the phone causing it to change behavior, for example turning
off the volume on the ringer. Alternatively, the central facility can process an
incoming call for a phone that is determined to be in a quiet zone to reduce intrusion
in the quiet zone; for example, it can send the call to a phone mailbox or give
the caller a busy signal.
