Packet loss

About: Packet loss is a research topic. Over the lifetime, 21235 publications have been published within this topic receiving 302453 citations.

Method for determining label assignments for a router

Abstract: Overhead is reduced and packet transport efficiency is increased for a flow of switched packets from a router by identifying a plurality of packets having a common destination node within a network and transmitting at least one control message to establish the flow of switched packets; the at least one control message including: (i) a label mapping message corresponding to the flow of switched packets and (ii) a header removal field. Packet headers corresponding to packets of a switched packet flow are not parsed, therefore either the entire header, or a portion of the header, may be removed from each packet assigned a label. A header removal field is shared among routers while signaling to establish a labeled flow. The header removal field is used to provide header structure information to those routers which will be utilized for transport of the subsequent labeled flow. Packet transport densities are monitored at individual routers. A dual-value threshold density methodology is applied at routers to determine whether packet transport density is great enough to warrant a dedicated label, a shared label applied to merged switched packet flows, or no label at all.

Data delivery system and method for delivering data and redundant information over a unidirectional network

Abstract: A data delivery system facilitates transmission of data packets from a content server to multiple clients over a unidirectional network. A redundancy formatter resident at the server groups multiple data packets into a redundancy group and generates at least one redundancy packet containing redundancy information derived from the data packets in the redundancy group. The data packets and redundancy packet are sent over the unidirectional network to the client. In the event that a packet is lost, a packet rebuilder resident at each client reconstructs the missing data packet from the successfully transmitted data packets in the redundancy group and the redundancy packet for the redundancy group.

Enhanced Compressed RTP (CRTP) for Links with High Delay, Packet Loss and Reordering

Abstract: This document describes a header compression scheme for point to point links with packet loss and long delays. It is based on Compressed Real-time Transport Protocol (CRTP), the IP/UDP/RTP header compression described in RFC 2508. CRTP does not perform well on such links: packet loss results in context corruption and due to the long delay, many more packets are discarded before the context is repaired. To correct the behavior of CRTP over such links, a few extensions to the protocol are specified here. The extensions aim to reduce context corruption by changing the way the compressor updates the context at the decompressor: updates are repeated and include updates to full and differential context parameters. With these extensions, CRTP performs well over links with packet loss, packet reordering and long delays.

Video Redundancy Coding in H.263

Abstract: The forthcoming new version of ITUT’s advanced video compression recommendation H.263 [1] includes several optional modes for the support of packet networks. This paper gives a brief description of those modes and discusses in detail a new method for temporal error resilience, called Video Redundancy Coding, which is one possible usage of one of the optional modes. In conjunction with spatial error resilience mechanisms, Video Redundancy Coding has been proven to be a superior method for achieving high quality video transmission over non guaranteed QoS packet networks that have packet loss rates as high as 20%, with a minimal additional coding overhead.

System and method for using distributed network performance information tables to manage network communications

Abstract: A system, method and network communications device including a processing unit configured to communicate data packets with one or more network communications devices. The data packets include network performance information generated by the one or more network communications devices in response to receiving a portion of the data packets. The network communications device further includes a memory in communication with the processing unit. The memory is configured to store a table containing network performance information associated with the node segments through which the data packets are communicated with the one or more network communications devices. The processing unit is further configured to process the data packets to store the network performance information in the table. The network performance information is utilized to alter future communications of the data packets through the node segments.