- Method for dynamic HF frequency allocation management in a broadband communication network containing a plurality of users, a set of frequencies S= {fi} i=1, N0 being allocated to each user, one frequency having one or more authorised SLA services, a maximum power level P max for each SLA service and an associated usage type, characterized in that it comprises at least the following steps: for each user • determining the range of passing frequencies for the user for a given link and SLA service, set S', (2-A), • establishing the set of authorised frequencies S" in the transmission range of the user with the different power and modulation configurations for each frequency, intersection between the set S and the range of passing frequencies S', (2-B), • analysing the received spectrum in order to determine the frequency or frequencies already used and deciding, on the basis of their associated usage type, whether they must be excluded in order to form a set S'" of N possible frequencies fl, (2-C), at the level of the link containing the users • for each frequency fl of the set S'", determining the necessary power P ̃ i i, i = 1... N, j = 1... m for each of the m possible rate/waveform configurations, taking into account the power limit on each frequency fl, (2-D) • allocating the frequencies fl of the set S'" to the different users, their modulation and their power, by taking account of multi-carrier constraints such as the maximum total band, the total power, the conformity of the transmitted spectrum resulting from the simultaneous use of the frequencies fl with the authorised power frequency pattern. for each user • determining the range of passing frequencies for the user for a given link and SLA service, set S', (2-A), • establishing the set of authorised frequencies S" in the transmission range of the user with the different power and modulation configurations for each frequency, intersection between the set S and the range of passing frequencies S', (2-B), • analysing the received spectrum in order to determine the frequency or frequencies already used and deciding, on the basis of their associated usage type, whether they must be excluded in order to form a set S'" of N possible frequencies fl, (2-C), • determining the range of passing frequencies for the user for a given link and SLA service, set S', (2-A), • establishing the set of authorised frequencies S" in the transmission range of the user with the different power and modulation configurations for each frequency, intersection between the set S and the range of passing frequencies S', (2-B), • analysing the received spectrum in order to determine the frequency or frequencies already used and deciding, on the basis of their associated usage type, whether they must be excluded in order to form a set S'" of N possible frequencies fl, (2-C), at the level of the link containing the users • for each frequency fl of the set S'", determining the necessary power P ̃ i i, i = 1... N, j = 1... m for each of the m possible rate/waveform configurations, taking into account the power limit on each frequency fl, (2-D) • allocating the frequencies fl of the set S'" to the different users, their modulation and their power, by taking account of multi-carrier constraints such as the maximum total band, the total power, the conformity of the transmitted spectrum resulting from the simultaneous use of the frequencies fl with the authorised power frequency pattern. • for each frequency fl of the set S'", determining the necessary power P ̃ i i, i = 1... N, j = 1... m for each of the m possible rate/waveform configurations, taking into account the power limit on each frequency fl, (2-D) • allocating the frequencies fl of the set S'" to the different users, their modulation and their power, by taking account of multi-carrier constraints such as the maximum total band, the total power, the conformity of the transmitted spectrum resulting from the simultaneous use of the frequencies fl with the authorised power frequency pattern.