A frame structure for scheduling radio resources includes a first time slot, followed by a plurality of other time slots each having either a second length, or a first length that is approximately double the second length. Transmissions are sent in downlink ones of the other time slots and received in uplink ones of the other timeslots. In various embodiments, the first length is 1.35 ms/19 symbols and the second length is 0.675 ms/9 symbols; the first timeslot is downlink and has length 0.852 ms/12 symbols; there is an additional guard period of 26 microseconds between the first timeslot and the other timeslot that follows the first timeslot which is uplink and has the first length; there may also be a single symbol between the guard period and that uplink timeslot for uplink signaling; and all other timeslots that are downlink are of the second length.

 
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