Uplink transmissions without uplink timing control and measurement

A method for wireless communication at a user equipment (UE), comprising:

• receiving a downlink message from a base station;
• identifying a transmit time window allocated for an uplink message responsive to the downlink message, wherein the transmit time window is allocated based at least in part on a maximum propagation round trip time (RTT) associated with UEs within a coverage area of the base station and a frame size of the uplink message;
• and
• transmitting the uplink message to the base station during an initial period of the transmit time window.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit a downlink message to a user equipment (UE);
• allocate a receive time window associated with receiving an uplink message from the UE responsive to the downlink message, wherein the receive time window is allocated based at least in part on a maximum propagation round trip time (RTT) associated with UEs within a coverage area of the apparatus and a frame size of the uplink message;
• monitor the receive time window for the uplink message from the UE;
• and
• receive the uplink message from the UE during the receive time window.

An apparatus for wireless communication, comprising:

• a processor;
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a downlink message from a base station;
• identify a transmit time window allocated for an uplink message responsive to the downlink message, wherein the transmit time window is allocated based at least in part on a maximum propagation round trip time (RTT) associated with UEs within a coverage area of the base station and a frame size of the uplink message;
• and
• transmit the uplink message to the base station during an initial period of the transmit time window.