A method performed by a terminal device, the method being characterized by the steps of: • generating capability indication information, o wherein the capability indication information includes for each signal of a proper subset of signals among a plurality of signals a separate capability value n i, the capability value n i indicating a maximum number of N frequency bands on which the terminal device supports simultaneous beam training for the i-th signal among those signals of the proper subset of signals, wherein n i is an integer greater than or equal to 1 and N is an integer greater than or equal to 1, wherein the proper subset of signals itself includes at least two signals, o wherein the capability indication information includes only for those signals of the proper subset of signals a capability value, but not for the remaining signals of the plurality of signals, o wherein each of the signals among the plurality of signals has a certain priority, wherein the priorities of the plurality of signals constitute a descending order of priorities; • sending the capability indication information to a network device; • receiving, from the network device, an indication indicating to the terminal device to calculate an L1-RSRP for each frequency band among z frequency bands of a first signal simultaneously transmitted by the network device to the terminal device in the z frequency bands during the beam training, wherein z is an integer not greater than a determined capability value of the first signal, the first signal being any signal among the plurality of signals. • generating capability indication information, o wherein the capability indication information includes for each signal of a proper subset of signals among a plurality of signals a separate capability value n i, the capability value n i indicating a maximum number of N frequency bands on which the terminal device supports simultaneous beam training for the i-th signal among those signals of the proper subset of signals, wherein n i is an integer greater than or equal to 1 and N is an integer greater than or equal to 1, wherein the proper subset of signals itself includes at least two signals, o wherein the capability indication information includes only for those signals of the proper subset of signals a capability value, but not for the remaining signals of the plurality of signals, o wherein each of the signals among the plurality of signals has a certain priority, wherein the priorities of the plurality of signals constitute a descending order of priorities; o wherein the capability indication information includes for each signal of a proper subset of signals among a plurality of signals a separate capability value n i, the capability value n i indicating a maximum number of N frequency bands on which the terminal device supports simultaneous beam training for the i-th signal among those signals of the proper subset of signals, wherein n i is an integer greater than or equal to 1 and N is an integer greater than or equal to 1, wherein the proper subset of signals itself includes at least two signals, o wherein the capability indication information includes only for those signals of the proper subset of signals a capability value, but not for the remaining signals of the plurality of signals, o wherein each of the signals among the plurality of signals has a certain priority, wherein the priorities of the plurality of signals constitute a descending order of priorities; • sending the capability indication information to a network device; • receiving, from the network device, an indication indicating to the terminal device to calculate an L1-RSRP for each frequency band among z frequency bands of a first signal simultaneously transmitted by the network device to the terminal device in the z frequency bands during the beam training, wherein z is an integer not greater than a determined capability value of the first signal, the first signal being any signal among the plurality of signals.