This disclosure relates to methods and devices for managing transmission or retransmission on shared spectrum channel in a wireless communication network. In one implementation, the method may include determining if an uplink grant is deprioritized by a uplink shared channel transmission on a shared spectrum channel. The method may further include determining if a media access control (MAC) data packet has been generated for the deprioritized uplink grant. The method may further include, in response to the uplink grant being deprioritized and the MAC data packet being generated for the deprioritized uplink grant, performing a retransmission of the MAC data packet with an available uplink grant.