370 / | HD | MULTIPLEX COMMUNICATIONS |
310 | DF | COMMUNICATION OVER FREE SPACE {10} |
328 | DF | .~ Having a plurality of contiguous regions served by respective fixed stations {2} |
329 | DF | .~.~ Channel assignment {4} |
336 | DF | .~.~.~ Combining or distributing information via time channels {1} |
337 | .~.~.~.~ Multiple access (e.g., TDMA) |