948 results about "Timeout" patented technology

Data stored within a cluster may be distributed among nodes each storing a portion of the data. The data may be replicated wherein different nodes store copies of the same portion of the data. In response to detecting the failure of a node, the cluster may initiate a timeout period. If the node remains failed throughout the timeout period, the cluster may copy the portion of the data stored on the failed node onto one or more other nodes of the cluster. If the node returns to the cluster during the timeout period, the cluster may maintain the copy of the data on the previously failed node without copying the portion of the data stored on the failed node onto any other nodes. By delaying self-healing of the cluster for the timeout period, an unbalanced data distribution may be avoided in cases where a failed node quickly rejoins the cluster.

The disclosed embodiments disclose techniques that facilitate of avoiding client timeouts in a distributed filesystem. Multiple cloud controllers collectively manage distributed filesystem data that is stored in one or more cloud storage systems; the cloud controllers ensure data consistency for the stored data, and each cloud controller caches portions of the distributed filesystem in a local storage pool. During operation, a cloud controller receives from a client system a request for a data block in a target file that is stored in the distributed filesystem. Although the cloud controller is already caching the requested data block, the cloud controller delays transmission of the cached data block; this additional delay gives the cloud controller more time to access uncached data blocks for the target file from a cloud storage system, thereby ensuring that subsequent requests of such data blocks do not exceed a timeout interval on the client system.

A distributed task scheduling method and system that separates and performs task management and task execution on separate computing devices and distributes task execution over multiple computing devices. The distributed task scheduler includes two-tier architecture having at least one execution host and at least one data broker. The execution hosts handle the tasks and the data broker manages the task schedule. The data broker determines any scheduled tasks that need to be executed. Once an available task is found, the data broker dispenses the scheduled task to an execution host. A timeout period is selected for each assigned task. If the assigned execution host does not report back to the data broker within the timeout period the completion of the assigned task, the data broker is free to assign the task to another execution host to ensure reliable execution of the task.

A queue-based spin lock with timeout allows a thread to obtain contention-free mutual exclusion in fair, FIFO order, or to abandon its attempt and time out. A thread may handshake with other threads to reclaim its queue node immediately (in the absence of preemption), or mark its queue node to allow reclamation by a successor thread.

A system and method for providing fault tolerance in a network telephony system. Signaling messages according to a signaling protocol, such as the SIP protocol, are modified to include a path attribute with a network address corresponding to a backup proxy server. When a primary proxy server is supported by a backup proxy server, the primary proxy server inserts the Alternate Path tag into one or more signaling messages. When a network entity sends a message, it checks the message to identify the primary proxy server. Upon receiving a failure or timeout when attempting to send to the primary proxy server, the sending network entity should try the backup proxy server specified in the path attribute. When the backup proxy server receives the message, it may modify the message to specify the new routing path. As a result, subsequent messages get routed properly using the backup proxy server.

A method, article, and system for the dynamic determination of an optimal interval for the generation of a heartbeat signal by a device employed in a system with a dynamic timeout interval.

A system and method for Internet protocol (IP) address discovery in a rapidly changing network environment is presented. A server and a client use an adaptive discovery polling process to determine an optimum heartbeat interval that minimizes network traffic and allows the server to monitor the client's source address. The client and server exchange discovery poll messages and heartbeat messages at varying time intervals in order to identify a computer network's timeout period or a network address translator's message block timeout period. Once the timeout period is identified, the client sends heartbeat messages to the server at an “optimum heartbeat interval” that is less than the identified timeout period in order to maintain the network connection. As a result, the server is able to send messages to the client without delay.

A communication network includes an SS7 Security Gatekeeper that authenticates and validates network control messages within, transiting, entering and leaving an overlying control fabric such as an SS7 network. The SS7 Security Gatekeeper incorporates several levels of checks to ensure that messages are properly authenticated, valid, and consistent with call progress and system status. In addition to message format, message content is checked to ensure that the originating node has the proper authority to send the message and to invoke the related functions. Predefined sets of templates may be used to check the messages, each set of templates being associated with respective originating point codes and / or calling party addresses. The templates may also be associated with various system states such that messages corresponding to a particular template cause a state transition along a particular edge to a next state node at which another set of templates are defined. Thus, system and call state is maintained. The monitor also includes signaling point authentication using digital signatures and timestamps. Timestamps are also used to initiate appropriate timeouts and so that old or improperly sequenced message may be ignored, corrected or otherwise processed appropriately. The SS7 Security Gatekeeper may be located at the edge of a network to be protected so that all messaging to and from the protected network most egress by way of the Gatekeeper. Alternatively, the SS7 Security Gatekeeper may be internal to the protected network and configured as a “pseudo switch” so that ISUP messaging is routed through the Gatekeeper while actual traffic is trunked directly between the associated SSPs, bypassing the Gatekeeper.

Communications bandwidth available to network servers and computers running client processes is allocated among connections available to those devices based on sets of priorities. Those priorities include type of information being retrieved, how fast user connections can receive information, which part of a document is being transmitted, user identity, stored indicia indicating importance of the document and the state of application processes running on said computer. Bandwidth is reallocated on an event driven basis upon arrival of a new request for retrieval, finishing sending information in response to a retrieval request, cancellation of a retrieval request, detection of the inability of a user connection to use all of the bandwidth allocated to it, a change of priority and timeout of a timer.

A system, method and computer program product are provided for executing a risk-assessment scan with a variable timeout duration which is set based on network conditions. Initially, network conditions are measured in a network coupled between a source and a target. Subsequently, a risk-assessment scan is executed on the target from the source. A timeout is performed prior to making a determination that the target is failing to respond to the risk-assessment scan. Such timeout includes a variable duration which is set as a function of the measured network conditions.

The present invention provides a streaming media cache configured to select a timing interval, chosen from a set of one or more predetermined timing intervals, for each client that requests a data stream from the streaming media cache. Illustratively, clients requesting data streams below a predetermined bit rate (“bandwidth”) are assigned longer timing intervals than clients requesting data streams above the predetermined bit rate. More specifically, because the server can accommodate a larger number of relatively low-bandwidth clients than relatively high-bandwidth clients, the server selects timing intervals of longer duration for the relatively low-bandwidth clients so it may have more time to schedule send times for their requested packets.

Systems and methods are disclosed for displaying health data during a security timeout. One method includes: displaying an interactive interface; receiving a data type included in the display; detecting a timeout of the interactive interface; hiding or removing the data type from the display in response to the timeout; and initiating an extended timeout including the display with the data type removed.

A fault-tolerant timeout protocol for distributed sensor arrays and networks in which each sensor has a plurality of backup nodes, each of which is operable to send priority information which includes the product of the time needed for the backup node to transmit sensor information to a base station and the number of tasks offered to the backup node. In another embodiment, the base station stores the two values and calculates their product. In both cases, the lowest resulting value is used by the base station to select the backup node, which then sends backup sensor information. Another aspect of the present invention is a fault-tolerant sensor integration algorithm. The algorithm creates an abstract sensor defined as an interval having values above and below the reading of an associated physical sensor, and finds a range of values common to more than half of the abstract sensors. The algorithm obtains an output value based on the common range of values, and identifies the correct sensors, possibly faulty sensors, and faulty sensors by identifying the abstract sensors that include, respectively, (a) all of the common range, (b) part of the common range, and (c) none of the common range. A further aspect of the invention is a multi-hop information forwarding method for a wireless network. According to this method, a data source node transmits a signal to neighboring nodes among a plurality of distributed nodes, and each neighboring node which receives the signal from the source node transmits a reply signal which includes a weighted sum of factors including an energy factor and a distance factor for the neighboring node, the energy factor being indicative of the neighboring node's energy level and the distance factor being indicative of its distance from the source node. A forwarding node is selected on the basis of the weighted sums, and the source node transmits a data packet to the selected forwarding node, where the data packet is received and retransmitted either to a data sink node, e.g., a base station, or to another forwarding node.

A communication network includes an SS7 Security Gatekeeper that authenticates and validates network control messages within, transiting, entering and leaving an overlying control fabric such as an SS7 network. The SS7 Security Gatekeeper incorporates several levels of checks to ensure that messages are properly authenticated, valid, and consistent with call progress and system status. In addition to message format, message content is checked to ensure that the originating node has the proper authority to send the message and to invoke the related functions. Predefined sets of templates may be used to check the messages, each set of templates being associated with respective originating point codes and / or calling party addresses. The templates may also be associated with various system states such that messages corresponding to a particular template cause a state transition along a particular edge to a next state node at which another set of templates are defined. Thus, system and call state is maintained. The monitor also includes signaling point authentication using digital signatures and timestamps. Timestamps are also used to initiate appropriate timeouts and so that old or improperly sequenced message may be ignored, corrected or otherwise processed appropriately. The SS7 Security Gatekeeper may be located at the edge of a network to be protected so that all messaging to and from the protected network most egress by way of the Gatekeeper. Alternatively, the SS7 Security Gatekeeper may be internal to the protected network and configured as a “pseudo switch” so that ISUP messaging is routed through the Gatekeeper while actual traffic is trunked directly between the associated SSPs, bypassing the Gatekeeper.

A Bluetooth master unit polls a slave unit to enable the slave to resynchronize to the master, by sending POLL packets with sufficient frequency to maintain a connection to the slave, and in the intervals between such packets, sending NULL packets with sufficient frequency to maintain synchronization of the slave. By replacing some POLL packets with NULL packets, since the slave does not have to respond to a NULL packet, it can save some power, and there is reduced interference on other piconets. The frequency of the remaining POLL packets is set according to a Link Supervision Timeout (to avoid having this timer expire and thus keep the Bluetooth Link to the slave alive) and according to the time since the master received the last packet from the slave.

A communication network includes a SS7 Security Gatekeeper that authenticates and validates network control messages within, transiting, entering and leaving an overlying control fabric such as an SS7 network. The SS7 Security Gatekeeper incorporates several levels of checks to ensure that messages are properly authenticated, valid, and consistent with call progress and system status. In addition to message format, message content is checked to ensure that the originating node has the proper authority to send the message and to invoke the related functions. predefined sets of templates may be used to check the messages, each set of templates being associated with respective originating point codes and / or calling party addresses. The templates may also be associated with various system states such that messages corresponding to a particular template cause a state transition along a particular edge to a next state node at which another set of templates are defined. Thus, system and call state is maintained. The monitor also includes signaling point authentication using digital signatures and timestamps. Timestamps are also used to initiate appropriate timeouts and so that old or improperly sequenced message may be ignored, corrected or otherwise processed appropriately. The SS7 Security Gatekeeper may be located at the edge of a network to be protected so that all messaging to and from the protected network most egress by way of the Gatekeeper. Alternatively, the SS7 Security Gatekeeper may be internal to the protected network and configured as a “pseudo switch” so that ISUP messaging is routed through the Gatekeeper while actual traffic is trunked directly between the associated SSPs, bypassing the Gatekeeper.

A method of facilitating substantially simultaneous receipt of electronic content by a plurality of intended recipients is disclosed. The electronic content is encrypted. The encrypted electronic content is transmitted to the plurality of intended recipients. An acknowledgement packet is received from each of the plurality of intended recipients within a predetermined timeout period. A handicap time is calculated for transmitting a decryption key to each of the intended recipient based on a time associated with the acknowledgement packet last received. Decryption keys are transmitted to the plurality of intended recipients using a delay based on the handicap time, where a decryption key having a smaller handicap time is transmitted prior to a decryption key having a larger handicap time.

A system is disclosed for generating a plurality of timeout event triggers in response to a plurality of kinds of timeout events. The system includes an overflow generator, which generates a plurality of overflow signals having a plurality of periods. The system also includes a plurality of trigger generators corresponding to the plurality of kinds of timeout events. Each of the plurality of trigger generators is associated with a corresponding timeout threshold value representing the minimum amount of time that must elapse for the trigger generator to generate a timeout event trigger. For each of the plurality of timeout triggers, a corresponding selection signal selects one of the plurality of periodic overflow signals. The timeout threshold corresponding to each timeout trigger is equal to the period of the corresponding selected overflow signal multiplied by the value of the corresponding control signal.

A network adapter for handling packet reordering receives a set of packets. The network adapter is configured to aggregate a subset of in-sequence packets from the set of packets into at least one segment before passing the at least one segment from the network adapter to a next layer in a protocol stack. An in-sequence packet from the set of packets is stored into a first segment. Responsive to receiving an out of sequence packet in the set of packets, the out of sequence packet is stored in a second segment. An adaptive timeout timer is activated responsive to receiving the out of sequence packet, and the first segment is held at the network adapter while the adaptive timeout timer runs. Prior to the adaptive timeout timer expiring, a missing packet is received and included in the first segment. The network adapter sends the first segment to the next layer.

Rapid and reliable network data delivery uses state sharing to combine multiple flows into one meta-flow at an intermediate network stack meta-layer, or shim layer. Copies of all packets of the meta-flow are buffered using a common wait queue having an associated retransmit timer, or set of timers. The timers may have fixed or dynamic timeout values. The meta-flow may combine multiple distinct data flows to multiple distinct destinations and / or from multiple distinct sources. In some cases, only a subset of all packets of the meta-flow are buffered.

A method, network receiver and TCP network that enables a receiver-side triggering of the fast retransmit mechanism when a TCP packet / segment is lost or received out-of sequencing order. The receiver is enhanced with a Fast Retransmit Support (FRS) utility that monitors when a next received packet is out-of-order and responds by transmitting a duplicate acknowledgment (ACK) response that includes therein the same window value as the previous ACK. By including the previous clock time, even when the current window value has advanced, the fast retransmit algorithm at the transmitter is triggering before the timeout period.

A task-crawling system for a distributed crawler system includes a controlling end, a crawling end, and a task monitoring module. The crawling end acquires a corresponding task, and sends data of the task to the controlling end. The controlling end works for assigning a number to the task, defining a timeout period for the task, generating a task-distribution event, and storing timestamp data of distribution of the task. The controlling end distributes the task distribution to the task monitoring module and the crawling end. The crawling end performs corresponding crawling logic to the crawl task, and sends information about completion of the task to the controlling end. In case of abnormality that prevents the crawl task from being performed properly, the task monitoring module re-pushes the task to the controlling end, thereby avoiding failure of the task otherwise caused by web-related problems.

This invention discloses a base station TCP proxy confirmation method based on ARQ information and its system. The method includes sending / receiving and processing the up and down data. The system includes a base station and a mobile station connected by radio links, in which, the base station includes a base station start up and control module, a sending and analyzing module, a base station segment and reassembling module, a proxy confirmation module and a receiving and analyzing module, the mobile station includes a start and control module, a segment reassembling module and a filter module, which increases the mobile rate of the TCP sending window and reduces the probability of timeout of TCP resulted in increasing transmission time delay by the data link layer ARQ.

An asynchronous successive approximation register analog-to-digital converter (SAR ADC), which utilizes one or more overlapping redundant bits in each digital-to-analog converter (DAC) code word, is operable to generate an indication signal that indicates completion of each comparison step and indicates that an output decision for each comparison step is valid. A timer may be initiated based on the generated indication signal. A timeout signal may be generated that preempts the indication signal and forces a preemptive decision, where the preemptive decision sets one or more remaining bits up to, but not including, the one or more overlapping redundant bits in a corresponding digital-to-analog converter code word for a current comparison step to a particular value. For example, the one or more remaining bits may be set to a value that is derived from a value of a bit that was determined in an immediately preceding decision.

A sending device dynamically adjusts a target number of data packets in a packet train by projecting a train property in advance of timeout, and adjusts the target accordingly. Preferably, the target size of the packet train is adjusted downward by checking the number of accumulated packets in the train at some predetermined time in the timeout interval, and halving the target packet train size if the accumulated packets number less than some intermediate target. This process can be repeated more than once in the same timeout interval. The target size is preferably adjusted upwards more slowly.

Aircraft systems and methods for detecting non-compliant pilot action are provided. The method comprises analyzing an outbound communication from an aircraft to recognize a word or phrase corresponding to a parameter associated with a prior request for pilot action. If the word or phrase is recognized, the method further comprises storing data corresponding to the outbound communication in a data storage device. The stored data and pilot action taken are compared to determine if there is a discrepancy between the pilot action and the stored data. A discrepancy alert is outputted if the discrepancy is determined to exist. A predetermined time interval is timed from the outbound communication. A timeout alert is outputted at a timeout of the predetermined time interval unless the requested pilot action is taken within the predetermined time interval.

The invention relates to an HPLC communication networking method, and relates to power line carrier communication, and the method comprises the steps of enabling a current node to judge whether to start a network access flow or not according to a preset evaluation strategy; after the network access process is started, selecting one node as a candidate proxy node according to the channel quality and hierarchy of the neighbor nodes and the number of received beacon frames; and generating an association request frame according to the timeout occurrence time of the timer so as to send a network access request to the candidate proxy node. According to the invention, the probability of agent change during network access is reduced, the number of SOF frames in a network optimization stage is reduced, and the overall communication efficiency of a carrier channel is improved.