Dropping measurements of synchronization signals

A wireless device, comprising:

• one or more processors, the one or more processors configured to:
• determine a synchronization source for the wireless device;
• determine a synchronization priority of the synchronization source;
• determine one or more rules for dropping transmissions of sidelink synchronization signals, the one or more rules corresponding to the synchronization priority of the synchronization source;
• and
• drop transmissions of sidelink synchronization signals according to the determined one or more rules for dropping transmissions of sidelink synchronization signals.

A network node, comprising:

• one or more processors, the one or more processors configured to:
• define one or more rules for dropping transmissions of sidelink synchronization signals by a wireless device, the one or more rules corresponding to a synchronization priority of a synchronization source;
• and
• communicate information about the defined one or more rules for dropping transmissions of sidelink synchronization signals to the wireless device.