Urban mobile network system

A mobile network system comprising:

• a central unit having:
• a database having stored therein a data structure;
• and
• a central unit communications transceiver for communicating with a first network;
• at least one intermediate base station having:
• a base station transceiver for communication with the central unit over the first network;
• and
• a mobile transmitter for transmitting data to a second network in a broadcast mode for receipt by a receiving unit and not requiring any back communication link to a receiving unit;
• a plurality of mobile units each operating as a receiving unit, each having:
• a mobile receiver for receiving the broadcast data from the base station over the second network, such that all of the plurality of mobile units receive the broadcast data at substantially the same time;
• and
• a memory for storing the data;
• wherein the central unit operates in a broadcast mode to map at least one portion of the data structure to the memory in each of the mobile units through the intermediate base station such that the portion of the data structure is received by substantially all of the mobile units at the same time.