A radio device, comprising: a plurality of radio entities (201, 202, 203) configured to transmit radio energy (211, 212, 213); and a controller communicatively coupled to the plurality of radio entities (201, 202, 203) and configured to assign first time quotas (404, 405) to the plurality of the radio entities (201, 202, 203) over a first time window of multiple time windows, the first time quotas (404, 405) defining periods of time for which the plurality of radio entities (201, 202, 203) are permitted to transmit the radio energy (211, 212, 213) in the first time window, cause the plurality of radio entities (201, 202, 203) to transmit the radio energy (211, 212, 213) based on the first time quotas (404, 405), generating a cumulative activity of the plurality of radio entities (201, 202, 203) in the first time window, assign second time quotas (404, 405) to the plurality of the radio entities (201, 202, 203) over a second time window of the multiple time windows after the first time window, the second time quotas (404, 405) defining periods of time for which the plurality of radio entities (201, 202, 203) are permitted to transmit the radio energy (211, 212, 213) in the second time window, wherein the second time quotas (404, 405) are derived based on the cumulative activity of the plurality of radio entities (201, 202, 203) in the first time window to comply with a predefined requirement for maximum radio frequency, RF, energy absorption by a human body when using the radio device, and cause the plurality of radio entities (201, 202, 203) to transmit the radio energy (211, 212, 213) based on the second time quotas (404, 405). a plurality of radio entities (201, 202, 203) configured to transmit radio energy (211, 212, 213); and a controller communicatively coupled to the plurality of radio entities (201, 202, 203) and configured to assign first time quotas (404, 405) to the plurality of the radio entities (201, 202, 203) over a first time window of multiple time windows, the first time quotas (404, 405) defining periods of time for which the plurality of radio entities (201, 202, 203) are permitted to transmit the radio energy (211, 212, 213) in the first time window, cause the plurality of radio entities (201, 202, 203) to transmit the radio energy (211, 212, 213) based on the first time quotas (404, 405), generating a cumulative activity of the plurality of radio entities (201, 202, 203) in the first time window, assign second time quotas (404, 405) to the plurality of the radio entities (201, 202, 203) over a second time window of the multiple time windows after the first time window, the second time quotas (404, 405) defining periods of time for which the plurality of radio entities (201, 202, 203) are permitted to transmit the radio energy (211, 212, 213) in the second time window, wherein the second time quotas (404, 405) are derived based on the cumulative activity of the plurality of radio entities (201, 202, 203) in the first time window to comply with a predefined requirement for maximum radio frequency, RF, energy absorption by a human body when using the radio device, and cause the plurality of radio entities (201, 202, 203) to transmit the radio energy (211, 212, 213) based on the second time quotas (404, 405). assign first time quotas (404, 405) to the plurality of the radio entities (201, 202, 203) over a first time window of multiple time windows, the first time quotas (404, 405) defining periods of time for which the plurality of radio entities (201, 202, 203) are permitted to transmit the radio energy (211, 212, 213) in the first time window, cause the plurality of radio entities (201, 202, 203) to transmit the radio energy (211, 212, 213) based on the first time quotas (404, 405), generating a cumulative activity of the plurality of radio entities (201, 202, 203) in the first time window, assign second time quotas (404, 405) to the plurality of the radio entities (201, 202, 203) over a second time window of the multiple time windows after the first time window, the second time quotas (404, 405) defining periods of time for which the plurality of radio entities (201, 202, 203) are permitted to transmit the radio energy (211, 212, 213) in the second time window, wherein the second time quotas (404, 405) are derived based on the cumulative activity of the plurality of radio entities (201, 202, 203) in the first time window to comply with a predefined requirement for maximum radio frequency, RF, energy absorption by a human body when using the radio device, and cause the plurality of radio entities (201, 202, 203) to transmit the radio energy (211, 212, 213) based on the second time quotas (404, 405).