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

A subscriber device in a communications network, having a transmitting/receiving device and a computing unit, the computing unit being set up to carry out communication in the communications network according to a communication protocol, wherein the computing unit is set up to carry out by program code the method of

• reserving a certain quality of service before data transmission of a data stream using a reservation request from a sender of the data to a recipient of the data by issuing a reservation request and receiving a confirmation for a communication connection, the reservation request comprising parameters of the requested quality of service, as a data rate of the data stream and a latency for the communication connection between the sender and the recipient, wherein the quality of service is guaranteed for the data stream in the event of a confirmation of the reservation request;
• checking, based at least in part on conditions of the communication connection, a required quality of service of the data before the data is transmitted;
• and
• adapting the certain quality of service of the data stream to the required quality of service of the data stream by the sender based on a topology of the communications network,
• wherein the communications network is synchronized only in a part of the communications network along the communication connection from the sender of the data to the recipient of the data, to process data packets emitted to the recipient and a second recipient at a same time,
• wherein the parameter of the required quality of service of the data stream comprises a usage time, wherein the usage time indicates a time from which the data transmitted in the data stream via the communications network can be used in the recipient.

A computer program product having program code which, when executed on a computing unit, are suitable for setting up the computing unit to carry out the method of:

• reserving a certain quality of service before data transmission of a data stream using a reservation request from a sender of the data to a recipient of the data by issuing a reservation request and receiving a confirmation for a communication connection, the reservation request comprising parameters of the requested quality of service as a data rate of the data stream and a latency the communication connection between the sender and the recipient, wherein the quality of service is guaranteed for the data stream in the event of a confirmation of the reservation request;
• checking, based at least in part on conditions of the communication connection, a required quality of service of the data before the data is transmitted;
• and
• adapting the certain quality of service of the data stream to the required quality of service of the data stream by the sender based on a topology of the communications network,
• wherein the communications network is synchronized only in a part of the communications network along the communication connection from the sender of the data to the recipient of the data, to process data packets emitted to the recipient and a second recipient at a same time,
• wherein the parameter of the required quality of service of the data stream comprises a usage time, wherein the usage time indicates a time from which the data transmitted in the data stream via the communications network can be used in the recipient.