Certain bits of a packet, such as bits in the IP header of an IP packet, are used to designate the type of service or Quality of Service (QoS) level to be afforded to the packet as it passes through a data communications network. A user entitled to a certain QoS level logs into a service selection gateway...http://www.google.de/patents/US20030039210?utm_source=gb-gplus-sharePatent US20030039210 - USE OF PRECEDENCE BITS FOR QUALITY OF SERVICE
