Communications network for a vehicle

A network bridge for bridging a time domain multiplexing (TDM) data network operating at a first data rate to an Ethernet network operating at a second data rate that is higher than the first data rate, the network bridge comprising:

• interface circuitry for interfacing the network bridge with the TDM data network;
• clock recovery circuitry for recovering a clock signal for use by the TDM data network from a from a frame received from the Ethernet network;
• acoustic data receiver circuitry coupled to the interface circuitry by a first low-latency data path, wherein the acoustic data receiver circuitry is configured to transmit acoustic data contained in Ethernet frames received at the network bridge from the Ethernet network to the interface circuitry;
• and
• acoustic data transmitter circuitry coupled to the interface circuitry by a second low-latency data path, wherein the acoustic data transmitter circuitry is configured to transmit Ethernet frames containing acoustic data received at the interface circuitry from the TDM data network to the Ethernet network.

A road noise cancellation (RNC) system for a vehicle, the RNC system comprising:

• a central compute ECU;
• a zonal ECU coupled to the central compute ECU by an Ethernet network;
• and
• an edge network, the edge network comprising an accelerometer and a microphone coupled to a time domain multiplexing (TDM) bus,
• wherein the zonal ECU comprises a network bridge configured to bridge acoustic data received from the edge network to the Ethernet network,
• and wherein the central compute ECU is configured to:
• receive the acoustic data from the Ethernet network;
• generate a road noise cancellation signal based on the received acoustic data;
• and
• transmit the road noise cancellation signal to an audio output transducer over the Ethernet network.

A communications network for a vehicle comprising:

• a central processing node;
• a zonal node;
• an Ethernet network coupling the central processing node to the zonal node;
• and
• an edge network coupled to the zonal node, the edge network comprising a time domain multiplexing (TDM) bus and a plurality of edge transducers coupled to the TDM bus,
• wherein the zonal node comprises a network bridge for bridging acoustic data received from the TDM bus to the Ethernet backbone network.