In some embodiments, an apparatus is configured to wirelessly communicate with a base station in a real-time internet protocol (IP) session using a first retransmission parameter in a first frame transmission scheme. In some embodiments, the apparatus is configured to determine a current performance metric and, based on the current performance metric, negotiate to use a second, different retransmission parameter in a second frame transmission scheme for communications via the real-time IP session. In some embodiments, the retransmission parameter is a number of retransmissions or a number of hybrid automatic repeat request (HARQ) processes.