As a pioneer of this patent application, Shakeel Mustafa explains the working principle of Packet switching technologies as innovated through this patent application. These communication technologies enable packets (discrete blocks of data) to be routed from a source node to destination node via network links. At each network node, packets may be queued or buffered, which may impact the rate of packet transmission. It should be appreciated that the experience of a packet as it is routed from its source node to its destination node affects quality of service (QoS). Shakeel Mustafa explains that the Quality of service (QoS) refers to the ability to provide different priority to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow. For example, a required bit rate, delay, jitter, packet dropping probability and/or bit error rate may be guaranteed. Quality of service guarantees are important if the network capacity is inadequate, especially for real-time streaming multimedia applications. For example, voice over IP, online games and IP-TV are time sensitive because such applications often require fixed bit rate and are delay sensitive. Additionally, such guarantees are important in networks where capacity is a limited resource, for example in networks that support cellular data communication. QoS is sometimes used as a quality measure, rather than as a mechanism for reserving resources. It is appreciated that the experience of data packets as they move through a network from source node to destination node can provide the basis for QoS measurements.
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