1. A method, performed by a wireless device, of reporting transmission power information to a network node in a wireless communication network, the method comprising:selecting which of two or more formats for power headroom (PH) or maximum transmission power (Pcmax), or mapping tables for PH or Pcmax, to employ in response to detecting one or more trigger criteria;
communicating the selection of formats for PH or Pcmax, or selection of mapping tables for PH or Pcmax, with the network; and
transmitting to the network a power headroom report (PHR) comprising at least one of a PH or Pcmax index with the selected format, based on the selected PH or Pcmax mapping table, respectively;
wherein a trigger criterion is a carrier frequency or carrier frequency range associated with a network node.