The invention relates to a process for transmission of data via a communication network to a terminal, and a network node for performance of the process. The data are transmitted to the terminal via the network node which can be connected with two or more terminals. On the network side at the network node for the transmission of data, a data stream is received which consists of useful data and protocol data. The network node removes the majority of the protocol data from the data stream received on the network side at the network node for the transmission of data and switches the remaining data stream in the direction of the terminal.
1. A method for transmission of data via a communication network the method comprising:
receiving, at a network node connected with two or more terminals, a data stream from the communication network, wherein the data stream comprises useful data and protocol data;
removing, at the network node, the protocol data of a portion of protocol layers from the received data stream; and
switching the remaining data stream to be transmitted to one of the terminals,
wherein the communication network is a bus system, and
wherein only one IP address is allocated to the network node for each of the two or more terminals connected to the network node.
2. The method according to claim 1 , wherein the removing the protocol data comprises removing protocol data of communication protocols of layers 1 to 4 for the terminals connected to the network node.
3. The method according to claim 2 , wherein the protocol data is structured according to an Open Systems Interconnection (OSI) model comprising the layers 1 to 4 .
4. The method according to claim 1 , wherein the network node communicates with the communication network via a multiple access protocol and the network node communicates with the terminals via a point-to-point protocol.
5. The method according to claim 1 , wherein a scope of the protocol data of the remaining stream is reduced by more than half in comparison with a scope of the protocol data of the received data stream.
6. A network node comprising:
a first interface for connecting the network node with two or more terminals;
a second interface for connecting the network node with a communication network; and
a control unit which removes protocol data from a portion of protocol layers from a data stream received from the communication network via the second interface, the data stream comprising useful data and the protocol data, and switches a remaining data stream to be transmitted to one of the terminals via the first interface,
wherein the communication network is a bus system, and
wherein only one IP address is allocated to the network node for each of the two or more terminals connected to the network node.
7. The network node according to claim 6 , wherein the control device removes the protocol data of communication protocols of layers 1 to 4 for the terminals connected with the network node and switches the remaining data stream reduced by the protocol data of the communication protocols of the layers 1 to 4 to the terminal concerned be transmitted the one of the terminals.
8. The network node according to claim 7 , wherein the protocol data is structured according to an Open Systems Interconnection (OSI) model comprising the layers 1 to 4 .
9. The network node according to claim 6 , wherein the control device is also configured to transmit the remaining data stream to the terminal via a point-to-point protocol.