A system comprising: a plurality of network controllers (112, 114, 122) comprising a first network controller (112, 114, 122) and a second network controller (112, 114, 122), wherein the first network controller (112, 114, 122) comprises a first clock (136, 138, 140) to produce a first oscillating signal, and the second network controller (112, 114, 122) comprises a second clock (136, 138, 140) to produce a second oscillating signal; a vehicle wireless local area network, WLAN, over which at least the first network controller (112, 114, 122) and the second network controller (112, 114, 122) are to communicate, wherein a link between the first network controller (112, 114, 122) and the second network controller (112, 114, 122) through the vehicle WLAN is a synchronized link based on transition edges of the first oscillating signal being aligned in time with transition edges of the second oscillating signal; wherein each of the first network controller (112, 114, 122) and the second network controller (112, 114, 122) comprises: a respective first queue to store data according to a real-time access class that is to be communicated between the first network controller (112, 114, 122) and the second network controller (112, 114, 122) over the synchronized link, and a respective second queue to store non-real-time access class data that is to be communicated between the first network controller (112, 114, 122) and the second network controller (112, 114, 122) over a further link separate from the synchronized link. a plurality of network controllers (112, 114, 122) comprising a first network controller (112, 114, 122) and a second network controller (112, 114, 122), wherein the first network controller (112, 114, 122) comprises a first clock (136, 138, 140) to produce a first oscillating signal, and the second network controller (112, 114, 122) comprises a second clock (136, 138, 140) to produce a second oscillating signal; a vehicle wireless local area network, WLAN, over which at least the first network controller (112, 114, 122) and the second network controller (112, 114, 122) are to communicate, wherein a link between the first network controller (112, 114, 122) and the second network controller (112, 114, 122) through the vehicle WLAN is a synchronized link based on transition edges of the first oscillating signal being aligned in time with transition edges of the second oscillating signal; wherein each of the first network controller (112, 114, 122) and the second network controller (112, 114, 122) comprises: a respective first queue to store data according to a real-time access class that is to be communicated between the first network controller (112, 114, 122) and the second network controller (112, 114, 122) over the synchronized link, and a respective second queue to store non-real-time access class data that is to be communicated between the first network controller (112, 114, 122) and the second network controller (112, 114, 122) over a further link separate from the synchronized link. a respective first queue to store data according to a real-time access class that is to be communicated between the first network controller (112, 114, 122) and the second network controller (112, 114, 122) over the synchronized link, and a respective second queue to store non-real-time access class data that is to be communicated between the first network controller (112, 114, 122) and the second network controller (112, 114, 122) over a further link separate from the synchronized link.