Methods used in radio nodes and associated radio nodes

A method used in a radio node, the method comprising:

• receiving a first synchronization signal from a superior radio node that serves the radio node;
• obtaining a first downlink transmission time position for the first synchronization signal;
• determining, based on the first downlink transmission time position, a third downlink transmission time position for a third synchronization signal to be transmitted from a neighboring radio node of the superior radio node;
• and
• sensing the third synchronization signal based on the third downlink transmission time position.

A computer arrangement used in a radio node, the computer arrangement comprising:

• a processing unit;
• and
• at least one memory storing program instructions that, when executed by the processing unit, configure the radio node to:
• receive a first synchronization signal from a superior radio node that serves the radio node;
• obtain a first downlink transmission time position for the first synchronization signal;
• determine, based on the first downlink transmission time position, a second downlink transmission time position for a second synchronization signal to be transmitted by the radio node;
• transmit the second synchronization signal via the second downlink transmission time position to one or more subordinate radio nodes served by the radio node;
• determine, based on the first downlink transmission time position, a third downlink transmission time position for a third synchronization signal to be transmitted from a neighboring radio node of the superior radio node;
• and
• sense the third synchronization signal based on the third downlink transmission time position.

A computer arrangement used in a radio node, the computer arrangement comprising:

• a processing unit;
• and
• at least one memory storing program instructions that, when executed by the processing unit, configure the radio node to:
• receive a first synchronization signal from a superior radio node that serves the radio node;
• obtain a first downlink transmission time position for the first synchronization signal;
• determine, based on the first downlink transmission time position, a third downlink transmission time position for a third synchronization signal to be transmitted from a neighboring radio node of the superior radio node;
• and
• sense the third synchronization signal based on the third downlink transmission time position.