| 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 | ![]() | .~.~.~ Combining or distributing information via time channels {1} |
| 337 | DF | .~.~.~.~> Multiple access (e.g., TDMA) |