917 results about "Timeout" patented technology

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 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.

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.

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 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 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.

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.

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.

In a first embodiment of the present invention, a method for configuring a plurality of input/output (I/O) interconnect switch ports is provided, the method comprising: starting a link training and status state machine (LTSSM) for each of the plurality of ports; placing each of the LTSSMs in a receiver detect state; changing all of the LTSSMs to a polling state only once receivers are detected or timeouts occur in the receiver detect states in each of the LTSSMs; changing all of the LTSSMs to a configuration state only once polling is successful or timeouts occur in the polling states in each of the LTSSMs; and completing the configuration state of each of the LTSSMs.

The invention relates to a method for controlling data in the active defense system of Honeynet by keeping the counting statistics for failed connections, wherein, every IP source address is provided with a counting statistic on the record thereof kept by a short-term counter: if the counting value of the short-term counter exceeds the threshold, that the worm abnormal behavior is detected is determined and the data packets sent from the IP source address are controlled, but if not, the multi-round detection mechanism is triggered and the record of the IP source address is kept in a long-term detection list; and if the timeout happens to a long-term counter, and the counting value thereof exceeds the threshold, that the worm abnormal behavior is detected is determined and the data packets are controlled, and if not, that the data packets are normal and can be released is determined. The method has the advantages that unknown or stealth aggressive behaviors which intentionally slow down the rate of the aggressive behaviors to bypass the control of firewalls, as well as low-rate aggressive behaviors can be identified, particularly, the novel aggressive behavior pattern invented by hackers can be analyzed and identified.

The invention belongs to the field of security authentication in the network space security discipline, and relates to a Byzantine fault-tolerant consensus method based on a distributed key. The method comprises the steps that super nodes participating in consensus are selected, and system common parameters are generated; generating a system public and private key pair and public and private keysof the candidate nodes in a mutual interaction authentication mode according to the public parameters sent by the system; selecting a main node from the super nodes to initiate a proposal request, andstarting a new round of consensus; the secondary node performs individual verification and aggregation verification on the proposal request, and finally determines whether to agree to send the block;after receiving the block, the common node completes time triggering to continue the consensus of the next round, and in the process, if the auxiliary node waits for the case proposal request timeoutor the case proposal response timeout of the main node, the auxiliary node broadcasts the view change request and replaces the main node; according to the invention, the efficiency of reaching the consensus process can be greatly improved.

Provided is an apparatus for detection timeout of each channel, which is a socket connection, in a Transmission Control Protocol (TCP) Offload Engine (TOE) using TCP accelerating hardware, and a method thereof. The timer managing apparatus of the TOE using the TCP accelerating hardware, including: a command register for receiving a command for a retransmission timer or a delayed ACK timer from an embedded processor of the TOE; a finite state machine (FSM) for storing information of a timer in operation by analyzing the command for the retransmission timer or the delayed ACK timer stored in the command register and controlling an entire operation of the timer managing apparatus; and a timeout checker for checking timeout of a timer in operation by using the stored timer information and notifying the timeout to the FSM.

The invention discloses an application use timeout reminding method and device and a readable storage medium, which can realize the function of closing the use authority of the application and reminding a user when the user uses the application timeout, thereby assisting the user to control the use time of the application. The method includes determining that a time when a first application installed in a terminal device runs in a foreground within a preset period of time is longer than or equal to a preset time length threshold value, wherein the preset time length threshold value is set according to a historical usage situation of the first application; closing the use right of the first application in the terminal device; outputting prompt information indicating an operation mode capable of re-opening the use right of the first application.

The invention relates to a method and a system for controlling the stable operation of an application service program. The method for controlling the stable operation of the application service program comprises the following steps of: A, receiving a start monitoring command from an application server, and acquiring the current running time and the timeout time limit from the application server; B, receiving an updating command of the application server, and acquiring the running time of the updating from the application server; C, calculating the time difference between the running time of the updating and the running time of the last time, and comparing the time difference with the timeout time limit; and D, when the time difference is greater than the timeout time limit, generating restoration information, and controlling the restoration of the application server. The method and the system solve the stability problem of an automatic service program in the process of long-time running so that the automatic service program can be restarted automatically when the automatic service program is automatically terminated to ensure that the automatic service program runs incessantly, and the running state of the application program of the application service program is traced and analyzed.

A disaster recovery system, including a target datastore for replicating data written to source datastores, and a checkpoint engine (i) for transmitting, at multiple times, quiesce commands to a plurality of host computers, each quiesce command including a timeout period that is adjusted at each of the multiple times, (ii) for determining, at each of the multiple times, whether acknowledgements indicating that a host has successfully stopped writing enterprise data to the source datastores, have been received from each of the host computers within the timeout period, (iii) for marking, at each of the multiple times, a cross-host checkpoint in the target datastore and reducing the timeout period for the quiesce commands at the next time, if the determining is affirmative, and (iv) for increasing, at each of the multiple times, the timeout period for the quiesce commands transmitted at the next time, if the determining is not affirmative.

The invention provides a second-level caching method and a two-stage timeout flow table structure, and belongs to the field of information storage and network structures. The second-level caching method comprises the following steps: after a controller receives the data packet cache missing message, allocating a timeout to a corresponding flow rule of the data packet, updating relevant informationof the rule in an information base; then, the controller installing the flow rule into a main storage module of the switch and processing the data packet according to the action domain information ofthe rule, for example, forwarding or discarding, if the rule hits the data packet again before overtime and expiration, the flow rule being still kept in the main storage module, repeating the process until the rule is overtime and expired, storing the rule in the auxiliary storage module and recording the timeout value; if the flow rule hits the data packet in the auxiliary storage module, moving the flow rule to the main storage module, and the timeout value being not changed, otherwise, expelling the flow rule from the switch. The structure has the beneficial effects that the cache hit rate is greatly improved, the rule installation frequency is remarkably reduced, and the energy consumption of TCAM query is reduced.

The method includes following steps: (1) registering at least two communication terminal numbers of user and recording them to database; (2) when receiving a call request for a communication terminal of a user, system builds calls for all communication terminals the user registered based on registered numbers; or builds a call for at least one communication terminal of the user, if receiver is picked up in good time, then connection is held till session is completed; if connection is not reached or timeout caused by no one picking up receiver, then system calls other terminals of the user; (3) when condition of disconnecting call is met, then calling is stopped. The invention raises rate of access success, reduces harmful effect for users caused by faults of communication devices.