A system is provided for maintaining Quality of Service (“QoS”) parameters of data transmissions. A packet-switched network framework is provided. The network framework includes at least one router for routing the data transmissions over the network framework. The network framework also includes...http://www.google.com.tw/patents/US20060239271?utm_source=gb-gplus-share專利 US20060239271 - Methods and systems for maintaining quality of service (QOS) levels for data transmissions