A method performed by a communication network node of a communication network for determining a synchronisation reference to be utilised by a first access node and a second access node of a local domain for communicatively connecting communication devices via transport network nodes of the communication network, the method comprising: • determining a backhaul domain including the transport network nodes of the communication network, • receiving , from the first access node, a request for a synchronisation reference, the request comprising identifications, IDs of the first and second access nodes, • for each one of first and second access nodes: i. determining a first combination of a first synchronisation reference and a related first synchronisation path extending through the backhaul domain between a synchronisation reference node of the first synchronisation reference and the access node, ii. determining a second combination of a second synchronisation reference and a related second synchronisation path extending through the backhaul domain between a synchronisation reference node of the second synchronisation reference and the access node, and iii. selecting , as a selected combination based on synchronisation requirements for the first and second access nodes, the first or the second combination of synchronisation reference and related synchronisation path, iv. request set-up of the first path or the second path according to the selected combination. • determining a backhaul domain including the transport network nodes of the communication network, • receiving , from the first access node, a request for a synchronisation reference, the request comprising identifications, IDs of the first and second access nodes, • for each one of first and second access nodes: i. determining a first combination of a first synchronisation reference and a related first synchronisation path extending through the backhaul domain between a synchronisation reference node of the first synchronisation reference and the access node, ii. determining a second combination of a second synchronisation reference and a related second synchronisation path extending through the backhaul domain between a synchronisation reference node of the second synchronisation reference and the access node, and iii. selecting , as a selected combination based on synchronisation requirements for the first and second access nodes, the first or the second combination of synchronisation reference and related synchronisation path, iv. request set-up of the first path or the second path according to the selected combination. i. determining a first combination of a first synchronisation reference and a related first synchronisation path extending through the backhaul domain between a synchronisation reference node of the first synchronisation reference and the access node, ii. determining a second combination of a second synchronisation reference and a related second synchronisation path extending through the backhaul domain between a synchronisation reference node of the second synchronisation reference and the access node, and iii. selecting , as a selected combination based on synchronisation requirements for the first and second access nodes, the first or the second combination of synchronisation reference and related synchronisation path, iv. request set-up of the first path or the second path according to the selected combination. <EOS>