Method for transmitting data in a packet-oriented communications network and correspondingly configured user terminal in said communications network

• US 9,942,165 B2
• Filed: 05/07/2013
• Issued: 04/10/2018
• Est. Priority Date: 05/11/2012
• Status: Active Grant

• Current Assignee: Continental Automotive GmbH (Continental AG)
• Original Assignee: Continental Automotive GmbH (Continental AG)
• Inventors: Nbauer, Josef, Zinner, Helge
• Primary Examiner(s): Vu, Huy D
• Assistant Examiner(s): Duffy, James P
• Application Number:
  US14/400,507
• Publication Number:
  US 20150156134A1
• Time in Patent Office: 1,799 Days
• Field of Search: None
• CPC Class Codes: H04L 47/722 at the destination endpoint, e.g. reservation of terminal resources or buffer space
• CPC Class Codes: H04L 47/724 at intermediate nodes, e.g. resource reservation protocol [RSVP]
• CPC Class Codes: H04L 47/803 Application aware
• CPC Class Codes: H04L 47/805 QOS or priority aware
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

Abstract

A method for transmitting data in a packet-oriented communications network, in particular of a motor vehicle and to a user terminal configured for carrying out the method. In the method, data packets are transmitted without a guaranteed transmission time for the data packets and with a guaranteed maximum transmission time for the data packets in said communications network. For a data transmission with a guaranteed transmission time, a specific quality of service is reserved prior to the data transmission by reservation request from the sender of the data to the receiver of the data and the data transmission with a guaranteed transmission time is only started once a confirmation of the reservation request sent by the sender has been received. In addition, selected data that is to be transmitted in a guaranteed transmission time is sent directly as a data stream of data packets and a reservation request is sent after the start of the data stream.

Claims

1. A method for transmitting data in a packet-oriented communications network, in which first data packets are transmitted without a guaranteed transmission time and with a guaranteed maximum transmission time for second data packets, comprising:

identifying, during startup, a data stream of the second data packets preconfigured for transmission with the guaranteed maximum transmission time;

providing each of the second data packets with an identifier;

immediately emitting selected data during startup intended to be transmitted in a guaranteed transmission time as a data stream of second data packets, without emitting a reservation request and waiting for a confirmation of the reservation request based at least in part on the identifier, the identifier providing preferential treatment in network devices prior to the reservation request being emitted; and

forwarding the reservation request including the identifier after a start of the transmission of the data stream of the selected data intended to be transmitted as the second data packets.

2. The method as claimed in claim 1, wherein the data stream is relabeled with a guaranteed transmission time for the second data packets after receiving a confirmation of the forwarded reservation request based at least in part on the identifier.

3. The method as claimed in claim 2, wherein the first and second data packets in the data stream along a communication connection are relabeled in switches in which the first and second data packets are received and emitted again based at least in part on the identifier.

4. The method as claimed in claim 1, wherein the data stream is initially declared to be a transmission of data without a guaranteed transmission time for the first data packets.

5. The method as claimed in claim 1, wherein a transport protocol is configured to transmit data with a guaranteed transmission time for the second data packets for the data stream, a setting of flags in a header of the first data packets in the data stream being used to determine that they are not data in need of reservation.

6. The method as claimed in claim 5, wherein the data stream of the selected data is identified, within a scope of an Ethernet AVB standard, by defining one of a special VLAN ID and a multicast sender address.

7. The method as claimed in claim 5, wherein the first data packets with a set flag in the header are handled with high priority by switches.

8. The method as claimed in claim 1, wherein the communications network is statically preconfigured.

9. The method as claimed in claim 1, wherein, when starting up the communications network, unplanned data traffic is not transmitted until the communications network has been configured.

12. The method as claimed in claim 1, wherein the packet-oriented communications network is a network for a motor vehicle.

13. The method as claimed in claim 1, wherein the network comprises at least one of the sender, the recipient and a switch.

10. A subscriber device in a communications network, comprising:

a transmitting/receiving device; and

a computing unit, the computing unit configured to carry out communication in the communications network according to a communication protocol, wherein the computing unit is configured to execute program code to;

identify a data stream, during startup of the subscriber device, of the second data packets preconfigured for transmission with the guaranteed maximum transmission time;

providing each of the second data packets with an identifier;

immediately emit selected data during startup intended to be transmitted in a guaranteed transmission time as a data stream of second data packets, without emitting a reservation request and waiting for a confirmation of the reservation request based at least in part on the identifier, the identifier providing preferential treatment in network devices prior to the reservation request being emitted; and

forward a reservation request, including the identifier, after a start of the transmission of the data stream of the selected data intended to be transmitted as the second data packets.

11. A nontransitory computer readable media having program code which, when executed on a computing unit, is configured to:

identify, during startup, a data stream of the second data packets preconfigured for transmission with the guaranteed maximum transmission time;

providing each of the second data packets with an identifier;

immediately emit selected data during startup intended to be transmitted in a guaranteed transmission time as a data stream of second data packets, without emitting a reservation request and waiting for a confirmation of the reservation request based at least in part on the identifier, the identifier providing preferential treatment in network devices prior to the reservation request being emitted; and

forward a reservation request, including the identified, after a start of the data stream of the selected data intended to be transmitted as the second data packets.