Abstract: Disclosed is a method and system for controlling congestion control in a packet data communication network in which a plurality of data is transmitted from a source node to a destination node. Depending on the congestion state in the network, the sender rate at which the source node is transmitting the data is adjusted based on the congestion feedback information and the bandwidth capacity of the network. The adjustment of the sender rate is performed according to predetermined criteria to establish a maximum data transmission rate and maximum fairness for the source.

Abstract: Disclosed is a system and method for supporting real-time packetization of multimedia information and retransmission of lost multimedia packets over a packet network, and the method includes the steps of: packetizing multimedia bitstrems into a plurality of transmission packets according to a predetermined scheme; storing copies of the transmission packets for a predetermined time period; transmitting the transmission packets in sequence to the client; detecting lost packets; sending retransmission requests to the server upon detection of a lost packet; and, retransmitting copies of lost packets, which are stored in the server memory within a predetermined time period, to the client system.

Abstract: Disclosed is a system and method for estimating retransmission timeout (RTO) in a real-time streaming applications over the Internet between a server and a client. Accordingly, the present invention employs retransmission timeout (RTO) in NACK-based applications to support multiple retransmission attempts per lost packet, wherein the RTO is estimated by an actual around-trip delay (RTT) and a smooth inter-packet delay variance.

Abstract: There is disclosed a delay budget controller for use with a decoder buffer that receives streaming data packets over a data network from a streaming transmitter and stores the data packets in a plurality of access units for subsequent retrieval by a streaming data decoder. The delay budget controller comprises 1) a first controller for monitoring at least one network parameter associated with the data network; and 2) a second controller for monitoring in the decoder buffer a delay budget region comprising a sequence of access units that are about to be accessed sequentially by the data decoder. The delay budget region comprises a retransmission region and a late region separated by a temporal boundary, wherein the second controller detects missing data packets in the retransmission region and the late region and, in response to detection of a missing data packet in the retransmission region, transmits a retransmission request for the missing data packet to the streaming transmitter.

Abstract: Disclosed is a method and system for controlling congestion control in a packet data communication network in which a plurality of data is transmitted from a source node to a destination node. Depending on the congestion state in the network, the sender rate at which the source node is transmitting the data is adjusted based on the congestion feedback information and the bandwidth capacity of the network. The adjustment of the sender rate is performed according to predetermined criteria to establish a maximum data transmission rate and maximum fairness for the source.

Abstract: Disclosed is a system and method for exchanging a plurality of messages between a server and a client over a communication link to support congestion control therebetween. The present invention provides congestion control in real-time streaming applications over the Internet between the server and the client, by employing an inventive data structure in NACK-based applications to support multiple retransmission attempts per lost packet. The ability to control network traffic without employing a retransmission timeout (RTO) protocol in NACK-based applications allows for the efficient handling of a large variety of network traffic, including video and multimedia traffic.

Abstract: Disclosed is a system and method for supporting real-time packetization of multimedia information and retransmission of lost multimedia packets over a packet network, and the method includes the steps of: packetizing multimedia bitstrems into a plurality of transmission packets according to a predetermined scheme; storing copies of the transmission packets for a predetermined time period; transmitting the transmission packets in sequence to the client; detecting lost packets; sending retransmission requests to the server upon detection of a lost packet; and, retransmitting copies of lost packets, which are stored in the server memory within a predetermined time period, to the client system.

Abstract: A method and device for estimating the bottleneck bandwidth over a communication network is provided. The method includes the steps of: transmission by the sever through a bottleneck link a plurality of bursts comprised of packets to the client; calculating a set of bandwidth samples for each burst received by the client end; determining a new bottleneck bandwidth from the calculated bandwidth samples for the following transmission of data packets between the server and the client. The device capable of estimating a bottleneck bandwidth includes: a means for transmitting a plurality of bursts comprised of packets; a means for receiving each burst packets via a bottleneck link; a means for generating a set of bandwidth samples based on a difference between an inter-packet spacing between the first and the last packet within each burst; and, a means for determining the current bottleneck bandwidth from the generated bandwidth samples.

Abstract: Disclosed is a system and method for estimating retransmission timeout (RTO) in a real-time streaming applications over the Internet between a server and a client. Accordingly, the present invention employs retransmission timeout (RTO) in NACK-based applications to support multiple retransmission attempts per lost packet, wherein the RTO is estimated by an actual around-trip delay (RTT) and a smooth inter-packet delay variance.