Flexible configuration of HARQ process feedback

Embodiments include methods for a wireless device operating in a wireless communication network. Such methods include receiving from the wireless communication network, during a first transmission-time interval (TTI), an explicit request for automatic repeat-request (ARQ) feedback from the wireless device. The request can include an indication of one of the following: a range of ARQ process numbers for which the ARQ feedback is requested, or a range of TTIs, indicating that the wireless device is to provide ARQ feedback for all ARQ processes active during the indicated range of TTIs. Such methods also include transmitting to the wireless communication network, during a second TTI after the first TTI, ARQ feedback information for the ARQ processes indicated in the request. Other embodiments include complementary methods performed by a network node, as well as wireless devices and network nodes configured to perform such methods.