Wireless communications for vehicles

A method for establishing a wireless communication channel between a network advertising transmitter and an observer, the method comprising, at the network advertising transmitter:

• configuring a plurality of global broadcast parameters between the network advertising transmitter and the observer using an out-of-band communication channel;
• and
• using at least one of the plurality of preconfigured global broadcast parameters to form a unique broadcast identifier code for a subsequent network advertising broadcast event, wherein the global broadcast parameters include one or more global broadcast parameters based on capabilities of both the network advertising transmitter and the observer and a synchronization value for the subsequent network advertising broadcast event,
• wherein the one or more configured global broadcast parameters comprise one or more or all of:
• a minimum network advertising broadcast interval between sequential network advertising broadcast events;
• a minimum network advertising broadcast synchronization, MinNABS offset comprising a minimum interval between transmission of the synchronization value and a subsequent network advertising broadcast event;
• and
• a maximum network advertising broadcast synchronization, MaxNABS, offset comprising a maximum validity time-period for the synchronization value.