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Received video quality is dependent on the available link rate and the packet loss rate, which are inter-related in a busy network link. Even low packet loss ratios (PLRs) can significantly reduce the video quality. In this paper, a packet level parity FEC is applied to the video stream in order to reduce the video PLR. A constant gross data rate is assumed, such that adding a FEC leads to a decrease...
In this paper, we present the design and the implementation of a test-bed for the Policy and Charging Control (PCC) system proposed in 3GPP TS23.203. Specifically, we use an IP multimedia call service example to demonstrate how to implement an advanced mobile service with policy and charging control in our test-bed. We show that the PCC system can handle the application-level session information and...
Voice over Internet Protocol is a growing technology that enables voice communication through the Internet. The transmission of audio data over packet switched networks faces lot of difficulties by a variety of network impairments. Such networks are not designed to support real time voice communication because of their variable characteristics. The conversational quality of a VoIP communication is...
Long Term Evolution (LTE) has being standardized by the 3rd generation partnership project (3GPP) as the evolution of WCDMA. Different from the conventional mobile communication technologies that deliver voice traffic through circuit switched networks, in LTE, all kinds of traffic are transferred through packet switched networks based on Internet Protocol (IP). In order to provide Quality of Service...
We have proposed (??, ??)-based flow regulation as a design instrument for system-on-chip (SoC) architects to control quality-of-service and achieve cost-effective communication, where ?? bounds the traffic burstiness and ?? the traffic rate. In this paper, we present a hardware implementation of the regulator. We discuss its microarchitecture. Based on this microarchitecture, we design, implement...
VoIP (Voice over Internet Protocol) is a technology that enables the routing of voice conversations over any IP-based network such as the public Internet. Separate and distinct client, gateway and call control functions that ability to support Peer-to-Peer, PC-to-telephone, telephone-to-PC and telephone-to-telephone scenarios. During transmission, the traffic loading and other factors in the IP (Internet...
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