| 摘要 |
<p>To improve the geographic resolution of broadcast messages transmitted over a communication network, such as a cellular telephone network, the originator of a message specifies a target area of reception. The target area of reception is compared to location data usually representing the terminal location. When the location data matches the target area of reception, the terminal accepts the message; otherwise, the terminal does not accept the message. In one embodiment of the invention, location data is determined by a positioning receiver and loaded into a register. In another embodiment, the location data is loaded into the register by manual keypad entry or by transmission over the network, so that the location data can define a location of interest other than the terminal's current geographic location, or so that terminal location data can be provided for communication terminals that lack a positioning receiver.</p> |
