Cross Indication of Queue Size in a Reverse Direction Protocol

This disclosure describes systems, methods, and computer-readable media related to cross indication of queue size in a reverse direction protocol. In some embodiments, a reverse direction (RD) grantor may transmit a frame to an RD responder. The RD responder may identify data to be transmitted to the RD grantor based on the received frame. The RD responder may generate a frame that may comprise a plurality of sub-frames. The RD responder may set a sub-field in each of the sub-frames indicating whether there is data to transmit. The RD responder may also set a second sub-field that may indicate a priority or traffic stream associated with the data to be transmitted. The RD responder may transmit the frame (and associated sub-frames) to the RD grantor.