1. A base station (BS), comprising:a radio; and
a processing element operably coupled to the radio;
wherein the radio and the processing element are configured to:
establish a first wireless communication link with a first wireless user equipment device (UE) according to a first radio access technology (RAT);
establish a second wireless communication link with a second UE according to the first RAT;
configure transmission time interval (TTI) bundling for downlink communications with the first UE and the second UE using the first RAT;
perform first downlink communications with the first UE using the first RAT using TTI bundling after providing the configuration, wherein said performing comprises, for each TTI bundle, transmitting a first control channel message indicating downlink parameters for each respective TTI bundle, wherein the downlink parameters comprise a redundancy version (RV), and wherein the RV for each TTI of each respective TTI bundle of the first downlink communications is determinable based on the downlink parameters; and
perform second downlink communications with the second UE using the first RAT using TTI bundling, wherein said performing comprises, for each TTI bundle, transmitting a second control channel message that does not indicate the RV in order to reduce the number of bits communicated in the control channel, wherein an order of RVs for respective TTIs of each TTI bundle of the second downlink communications is determined from a fixed configuration.