A method performed by a base station comprising: receiving a first uplink transmission of a transport block, TB, from a user equipment, UE; and transmitting a message to the UE in downlink control information, DCI, wherein the message comprising a plurality of bits indicating hybrid automatic repeat request, HARQ, feedback corresponding to the TB and indicating a change in resources to be used by the UE for a second uplink transmission, wherein the UE is a first UE, wherein the message is in a first field of a group common DCI message, characterized in that the method further comprises: receiving a plurality of uplink transmissions from a plurality of UEs, the plurality of UEs including the first UE; generating the group common DCI message to have a plurality of fields, each field corresponding to a respective one of the UEs, and each field at least providing HARQ feedback to the respective UE, wherein one of the fields is the first field and corresponds to the first UE and includes the plurality of bits; transmitting the group common DCI message, wherein the plurality of UEs includes a second UE that is different from the first UE, wherein a second field of the fields corresponds to the second UE, wherein the first field is different from the second field, wherein the first field indicates one of a first set of possible changes in resources to be used by the first UE, wherein the second field indicates one of a second set of possible changes in resources to be used by the second UE. receiving a first uplink transmission of a transport block, TB, from a user equipment, UE; and transmitting a message to the UE in downlink control information, DCI, wherein the message comprising a plurality of bits indicating hybrid automatic repeat request, HARQ, feedback corresponding to the TB and indicating a change in resources to be used by the UE for a second uplink transmission, wherein the UE is a first UE, wherein the message is in a first field of a group common DCI message, characterized in that the method further comprises: receiving a plurality of uplink transmissions from a plurality of UEs, the plurality of UEs including the first UE; generating the group common DCI message to have a plurality of fields, each field corresponding to a respective one of the UEs, and each field at least providing HARQ feedback to the respective UE, wherein one of the fields is the first field and corresponds to the first UE and includes the plurality of bits; transmitting the group common DCI message, wherein the plurality of UEs includes a second UE that is different from the first UE, wherein a second field of the fields corresponds to the second UE, wherein the first field is different from the second field, wherein the first field indicates one of a first set of possible changes in resources to be used by the first UE, wherein the second field indicates one of a second set of possible changes in resources to be used by the second UE. receiving a plurality of uplink transmissions from a plurality of UEs, the plurality of UEs including the first UE; generating the group common DCI message to have a plurality of fields, each field corresponding to a respective one of the UEs, and each field at least providing HARQ feedback to the respective UE, wherein one of the fields is the first field and corresponds to the first UE and includes the plurality of bits; transmitting the group common DCI message, wherein the plurality of UEs includes a second UE that is different from the first UE, wherein a second field of the fields corresponds to the second UE, wherein the first field is different from the second field, wherein the first field indicates one of a first set of possible changes in resources to be used by the first UE, wherein the second field indicates one of a second set of possible changes in resources to be used by the second UE.