A CDMA data transmission system and method for periodically allocating channels to subscriber units, wherein prior to the beginning of any period all active subscriber units are identified that are in communication with the transmitter and for which there are data, exceeding a given minimal quantity, stored in a buffer. The devices, methods, and programs read the stored map data, perform a route search within each predetermined area on a departure point side and a destination side, and acquire a shortest cost route in a range overlapped in search areas. As a result, the overhead in data repositories as well as any crawlers updating the content index may be reduced. The data driver circuit includes a feedback capture circuit that captures each of the data digits of the data signal in substantially the same manner as the data capture circuit, and also generates a latch control signal indicative of when each data bits is latched. An indication of the resulting pages is displayed according to the calculated importance.