497results about How to "Network degradation" patented technology

An intrusion detection system (IDS) is capable of identifying the source of traffic, filtering the traffic to classify it as either safe or suspect and then applying sophisticated detection techniques such as stateful pattern recognition, protocol parsing, heuristic detection or anomaly detection either singularly or in combination based on the traffic type. In a network environment, each traffic source is provided with at least one IDS sensor that is dedicated to monitoring a specific type of traffic such as RPC, HTTP, SMTP, DNS, or others. Traffic from each traffic source is filtered to remove known safe traffic to improve efficiency and increase accuracy by keeping each IDS sensor focused on a specific traffic type.

A method of providing location-based services includes transmitting a first location criterion from a wireless network server to a wireless device. The method also includes evaluating whether a physical location of the wireless device satisfies the first location criterion. The process of evaluating is performed in part using the wireless device. When the first location criteria is satisfied, the method further includes transmitting an indication from the wireless device to the server that the first location criterion has been satisfied.

A system for write forwarding in a storage environment employing distributed virtualization includes a first and a second storage server providing access to a first and a second physical storage device, respectively, a virtual device server and a virtual device client. The virtual device server may be configured to aggregate storage in the first and second physical storage device into a virtual storage device and make the virtual storage device accessible to the virtual device client for I/O operations. An update requested by the virtual device client may require a first physical write operation at the first physical storage device and a second physical write operation at the second physical device. The virtual device client may be configured to send an update request to the first storage server, rather than to both the first and the second storage servers. The first storage server may respond to the update request by starting the first physical write operation, and forwarding a request for the second physical write operation to the second storage server.

A packet switching node having a pipelined packet processing architecture processing packets received via an input port associated with the packet switching node is presented. The method performed by the apparatus includes: determining a packet frame type of the packet received; selectively extracting packet header field values specific to a packet frame type, the extracted packet header field value including packet addressing information; ascribing to the packet a preliminary action to be performed in respect of the packet; searching packet switching information tracked by the packet switching node based on extracted packet addressing information; formulating a preliminary switch response for the packet; classifying the packet into one of a plurality of packet flows; modifying the preliminary switch response in accordance with one of the preliminary action, the packet flow into which the packet was classified, and a default port action corresponding to the input port; modifying the packet header in accordance with one of the preliminary action, the packet flow, and the default port action; and processing the packet in accordance with the switch response. Advantages are derived from: pipelined processing of packets which enables short-cutting the rest of the processing for improper packets; a flexible frame type determination which is fast for well know frame types yet flexible in support of new frame types delaying obsolescence of a particular implementation; an early determination of a processing action which is successively refined by subsequent stages; a combined Layer-2 and Layer-3 network addressing search engine operating on short bit length indexed Layer-2 and Layer-3 network addresses reducing network address table storage requirements, requiring a reduced data transfer bandwidth for network address table access, a large external hashed primary network address table, and a small internal secondary network address table; an early determination of a switch response; and packet-classification-based switch response and packet header modification.

The invention in the preferred embodiment features a system (200) and method for automatically segregating harmful traffic from other traffic at a plurality of network nodes including switches and routers. In the preferred embodiment, the system (200) comprises an intrusion detection system (105) to determine the identity of an intruder and a server (130) adapted to automatically install an isolation rule on the one or more network nodes (114, 115, 116) to quarantine packets from the intruder. The isolation rule in the preferred embodiment is a virtual local area network (VLAN) rule or access control list (ACL) rule that causes the network node to route any packets from the intruder into a quarantine VLAN or otherwise isolate the traffic from other network traffic. In large networks, the isolation rule may be installed on a select plurality of network nodes under the gateway router (104) associated with the node at which the intruder first entered the network (100).

A method and apparatus are provided for adjusting the volume of data communicated between a transmitter and a receiver on a network, in a time interval. The method involves producing a desired volume value in response to a volume value specified by the receiver and a difference between a target departure volume and an estimate of arrival volume of data at a queue through which data passes from the transmitter to the receiver, and communicating the desired volume value to the transmitter in response to an acknowledgement signal produced by the receiver.

The invention proposes a system for authenticating and authorizing network services comprising: a mobile device being adapted to, upon receipt of an information message indicating at least one network access type, determine the network access type, to create a start message containing at least a user identity, and to encapsulate the start message in an authentication message compatible with the access network identified in the information message, and an access controller for reading the encapsulated message from the mobile and forwarding the encapsulated message to an authentication server identified in the encapsulated message. The invention also proposes a corresponding method for authenticating and authorizing network services, and an access control device, a subscriber device and a router device.

Method and apparatus for mitigating routing misbehavior in a network is described. In one example, routing protocol traffic is received from a remote router destined for a local router. The routing protocol traffic is parsed to identify a subset of traffic. The subset of traffic is normalized to identify and correct misconfigured routing updates. The routing protocol traffic is provided to the local router. In one embodiment, the subset of traffic is normalized by at least one of detecting and correcting routing protocol semantics, detecting and correcting violations in routing policies, detecting and correcting routing anomalies, or mitigating routing instability.

A radio base station includes multiple antennas associated with a cell. Multiple mobile radios are selected to receive transmissions over a shared radio channel during a predetermined time interval. Information is transmitted over the shared radio channel to multiple mobile radios in the cell during the predetermined time interval using multiple antenna beams. As a result, interference from the transmission appears as white additive Gaussian noise in time and in space in the cell. A “flashlight effect” caused by a single beam transmission over the shared channel during a predetermined time interval that would normally detrimentally impact mobile channel quality detection is avoided. Other methods for avoiding the flashlight effect are described.

The present invention provides a unique system and method that facilitates reducing network traffic between a plurality of servers located on a social-based network. The system and method involve identifying a plurality of vertices or service users on the network with respect to their server or network locations. The vertices' contacts or connections can be located or determined as well. In order to minimize communication traffic, the vertices and their connections with respect to their respective server locations can be analyzed to determine whether at least a subset of nodes should be moved or relocated to another server to facilitate mitigating network traffic while balancing user load among the various servers or parts of the network. Thus, an underlying social network can be effectively partitioned. In addition, the network can be parsed into a collection of nested layers, whereby each successively less dense layer can be partitioned with respect to the previous (partitioned) more dense layer.

A packet network congestion control system using a biased packet discard policy includes a plurality of end points having codecs operating in a framework, e.g. ITU-T H.323 protocol to establish a communication session. The protocol enables the codecs to negotiate codec type and associated parameters. Once a connection and session are established, compressed voice and data packets start flowing between the two end points. A control entity supplies congestion control packets periodically. The control packets provide a "heartbeat" signal to the codec at the other end of the session. Each codec receiver uses the "heartbeat" signal as an indication of network congestion. As network congestion increases, routers within the network discard excess packets to prevent network failure. The network discards all packets classified as congestion control packets whenever a flow control mechanism detects congestion or a trend toward congestion. As packets are discarded, the end points renegotiate codec type and/or parameters to realize lower bit rates.

Methods or systems for management and/or optimization of at least a portion of a data network by generating a set of paths between each origin and destination pair, pruning the set of paths to generate a pruned set of paths; and computing an optimum path between each origin and destination pair. Methods and systems for generating a diverse set of path options for the routing of traffic within at least a portion of a network comprising: generating a set of paths between each origin and destination pair; and pruning the set of paths to generate a pruned set of diverse path options within at least a portion of a network.

A method and system for transporting traffic having disparate qualities of service classes across a packet-switched network includes receiving at an ingress node of a network a plurality of packets each comprising a quality of service (QoS) class defined externally to the network. Packets having a QoS class comprising delay bound guarantees and a low drop priority are combined into a first internal QoS class. Packets having a QoS class comprising a flexible drop priority and no delay bound guarantees are combined into a second internal QoS class. Packets having a QoS class including no delivery guarantees are combined into a third internal QoS class. The packets are transmitted in the network based on their internal QoS class.

The present invention relates to a computer network and a method for using the network The network and method employ powered multiplexing connection devices which electronically couple two or more network devices to the network. The signals from the network devices to the network are multiplexed at the powered multiplexing connection devices and the signals from the network to the network devices are demultiplexed at the powered multiplexing connection devices. The multiplexing enables the various work-center devices to communicate with the network and, in some cases, to receive power over the network connection. The intelligent electronic circuitry is also capable of aiding in network security and management and in monitoring the status of the network infrastructure. A primary advantage of the disclosed invention is an enormous reduction in the network administrator's workload in that a significant portion of the labor involved in managing and modifying a network is alleviated or obviated by the powered, intelligent, multiplexing connection devices.

A first appliance of a network memory includes a processor configured to receive data. The processor determines whether the data is locally accessible to a second appliance of the network memory and generates an instruction based on the determination in order that the second appliance obtain the data. The processor then transfers the instruction over a communication network to the second appliance. In another first appliance of a network memory, the first appliance includes a processor configured to receive an instruction over a communication network from a second appliance of the network memory. The processor processes the instruction to determine an action to perform to obtain the data. The processor performs the action to obtain the data if the data is locally accessible to the first appliance.

Systems and methods for pre-positioning data in a network memory are described. A pre-positioning command may be executed to position specific data at one or more network memory appliances before the data is requested at a branch office. For example, the first download of a software update over the communication network at a branch office may require several minutes. To make the first download of the software update faster, the software update may be downloaded previously to the branch appliance. According to various embodiments, the pre-positioning command may comprise a time of transfer and/or a schedule. The data may be received by a pre-positioning receiver such as a file system server, a hypertext transfer protocol server, a file transfer protocol server, or a virtual client.

An optical fiber connector plug for an optical fiber connection comprises a connecting portion including a rear entry at a first end and a first fiber stub exit opening to a first fiber stub channel. The first fiber stub exit is parallel to a second fiber stub exit opening to a second fiber stub channel. The first and second fiber stub exits are formed opposite the first end. The rear entry divides at a junction into a first fiber groove and a second, diverging fiber groove. The connecting portion includes crimp elements each having an open-ended bore. Each crimp element contains an optical fiber stub. A molded top attached to the connecting portion includes a substantially rectangular opening. The opening contains a compression element that moves to form splices by capturing a stripped optical fiber and an optical fiber stub in each of the crimp elements. A bend relief boot encloses the connecting portion at one end, while a shroud releasably engages it at the other end.