Method for aligning of packet loss priority information in a data-packet switching communication device
View Patent ↗A method for aligning packet loss priority information for overload control of a data-packet-switching communications device wherein data packets and respectively allocated packet loss priority information are transmitted to the communications device and buffered in relation to a specific connection. The packet loss priority information is then read from the buffered data packets and modified according to the connection type or the application-specific data traffic type. After the data packet has been switched in the communications device, the original packet loss priority information which was switched with the data packets is re-inserted into the corresponding data packet.
1. A method for aligning packet loss priority information for overload control of a communications device that switches data packets, the method comprising the steps of:
transferring and buffering in a memory area, via the communications device, the data packets and respectively allocated loss priority information in relation to a specific connection;
reading the packet loss priority information from the buffered data packets;
modifying the packet loss priority information of the buffered data packet depending on the specific connection or application-specific data traffic type; and
restoring, after a data packet has been switched in the communications device, the original packet loss priority information in the corresponding data packet.
2. A method for aligning packet loss priority information for overload control of a communications device as claimed in claim 1 , the method further comprising the steps of:
recording the packet loss priority information read from the buffered data packet in an additional communications-device-specific data packet header;
attaching the additional data packet header to the buffered data packet; and
switching the buffered data packet, including the attached additional data packet header, in the communications device.
3. A method for aligning packet loss priority information for overload control of a communications device as claimed in claim 1 , the method further comprising the step of:
allocating different loss priorities to the respective data packet by the packet loss priority information.
4. A method for aligning packet loss priority information for overload control of a communications device as claimed in claim 1 , the method further comprising the step of:
modifying the respective data packets of a group of data packets with packet loss priority information depending on at least one of the connection type and the application-specific data traffic type.
5. A method for aligning packet loss priority information for overload control of a communications device as claimed in claim 2 , the method further comprising the step of:
removing the additional communications-device-specific data packet header attached to the data packet after a data packet has been switched in the communications device.
6. A method for aligning packet loss priority information for overload control of a communications device as claimed in claim 1 , wherein, in cell-switching communications devices, the packet loss priority information is cell loss priority information.
7. A method for aligning packet loss priority information for overload control of a communications device as claimed in claim 6 , wherein the cell loss priority information is formed from information having one bit.