Methods and apparatuses for enhancement of quality of service flows, for extended reality services or other services are proposed. For example, a method can include receiving a plurality of quality of service parameters for first packet-based communication. The quality of service parameters can include a packet delay budget for the first packet-based communication having a first end time. The plurality of quality of service parameters can further include a packet validity time for the first packet-based communication having a second end time equal to or later than the first end time. The packet validity time can be applicable to the first packet-based communication on a protocol data unit session basis, a quality of service flow basis, a set of protocol data units basis, or a packet basis. The method can also include transmitting the packet of the first packet-based communication to a further communication device.