Traffic broadcasting system
First Claim
1. A method of transmitting information from a central ground station to a plurality of mobile auxiliary ground stations via at least one base station, each of said auxiliary ground stations being located within the transmitting range of at least one of said base stations and being provided with a receiving device having a control unit and a memory, said method comprising the steps of:
- transmitting from said central ground station a block of messages cyclically repeated within a time frame, each message including an address code corresponding to the area code of the region adjacent a corresponding base station, said block of messages being transmitted on a single frequency;
receiving said block of messages at each of said base stations;
transmitting from each of said base stations said received block of messages, said block of messages being transmitted on a single frequency;
receiving said block of messages at the receiving device of said auxiliary ground stations;
recording in said memory those received messages having a selected area code and controlling said memory with said control unit to effect said recording;
converting said recorded messages to an information signal;
recording changed messages having said selected area code and a changed signal associated therewith; and
converting said recorded changed messages to an information signal and controlling said memory with said control unit to effect said converting of said recorded changed messages to said information signal.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention comprises a method of transmitting information from a central ground station to at least one mobile auxiliary ground station via at least one base station. The auxiliary ground stations are located within the transmitting range of at least one base station, and are provided with a receiving device having a control unit and a memory. In accordance with this method, a block of messages cyclically repeated within a time frame is transmitted over a single frequency from the central ground station to the base stations. Each of the messages within the block includes an address code which corresponds to the area code of the region adjacent a corresponding base station.
The base stations transmit the block of messages over a single frequency to receiving devices located in the mobile auxiliary ground stations where those messages corresponding to a selected area code are recorded and then played back.
37 Citations
9 Claims
-
1. A method of transmitting information from a central ground station to a plurality of mobile auxiliary ground stations via at least one base station, each of said auxiliary ground stations being located within the transmitting range of at least one of said base stations and being provided with a receiving device having a control unit and a memory, said method comprising the steps of:
-
transmitting from said central ground station a block of messages cyclically repeated within a time frame, each message including an address code corresponding to the area code of the region adjacent a corresponding base station, said block of messages being transmitted on a single frequency; receiving said block of messages at each of said base stations; transmitting from each of said base stations said received block of messages, said block of messages being transmitted on a single frequency; receiving said block of messages at the receiving device of said auxiliary ground stations; recording in said memory those received messages having a selected area code and controlling said memory with said control unit to effect said recording; converting said recorded messages to an information signal; recording changed messages having said selected area code and a changed signal associated therewith; and converting said recorded changed messages to an information signal and controlling said memory with said control unit to effect said converting of said recorded changed messages to said information signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification