239 results about "Active message" patented technology

A method for IP [=Internet Protocol] communication between a mobile terminal and its correspondent node in a mobile radio network. The method comprises establishing (2-2) an IP connection between the mobile terminal and its correspondent node. After detecting a period of inactivity in the IP connection, (2-4) keep-alive messages are sent via the IP connection at predetermined intervals, which are varied. The method comprises monitoring (2-6) the lengths of several periods of inactivity at which the mobile radio network disconnects the IP connection. Based on the monitored lengths of periods of inactivity, a maximum interval (T_INT) between keep-alive messages is determined (2-8) such that the maximum interval meets a predetermined criterion of statistical confidence, and the interval between keep-alive messages is set (2-10) to the maximum interval (T_INT).

Systems and methods for remotely shutting down or preventing operation of device via a wireless network infrastructure are provided. The device may be disabled using a defined command the device receives on a wide area network, such as a SPOT network or wireless carrier network. In various embodiments, the device responds to pre-defined command(s) and operation is disabled locally. Override codes may be used to locally re-enable the device. In a “keep alive” embodiment, the device operates as long as it continues to receive “keep alive” messages from the intended environment.

A system, method, and computer-readable medium having computer-executable instructions for maintaining connections between a mobile device and a server are described herein. In an embodiment, the method operates by receiving a data request from the mobile device, the data request identifying at least a timeout interval. The method comprises sending the data request to a data server and then determining whether the timeout interval has passed. The method also comprises sending a keep alive message to the mobile device indicating that the request has timed out if it is determined that the timeout interval has passed. The method then receives a re post request from the mobile device, the re post request identifying a timeout interval. The method further comprises receiving a response from the data server, the response including at least data requested by the mobile device and then sends the response to the mobile device.

A method to provide high availability in network elements using distributed architectures. The method employs multiple software components that are distributed across data/forwarding plane and control plane elements in a network element. The software components in the data/forwarding plane include active and standby components. Components in the control plane are provided to communicate with the components in the data/forwarding plane. A keep-alive messaging mechanism is used to monitor operation of the various elements in the network element. Upon detection of a failure to a hardware or software component, the data/forwarding plane and/or control plane elements are reconfigured, as applicable, to replace a failed active component with a corresponding standby component. This enables the network element to be reconfigured in a manner that is transparent to other network elements, and provided high availability for the network element.

A method of collecting data from pages viewed by a user of at least one web site, comprises receiving from at least one activity message reporter a plurality of access reports wherein an access report includes content from at least one web page of the at least one web site. Thereafter the method accumulates the received access reports, and formats content from the received access reports in accordance with a document template.

The invention provides a method and system for sending and receiving end-to-end bidirectional keep-alive messages using virtual circuits. Nodes coupled to a network, such as a frame relay network, periodically exchange link-layer "keep-alive" messages which indicate information regarding configuration and status of the virtual circuit, as well as information regarding congestion at sending nodes. Nodes respond to received keep-alive messages, or to timed-out failure to receive keep-alive messages, with follow-on actions, such as attempting to reconnect when a virtual circuit fails. Keep-alive messages may be propagated across multiple networks of either similar or different architecture. Keep-alive messages include sent and received sequence numbers, thus providing receiving nodes with a technique for determining if any keep-alive messages have been lost. Keep-alive messages can also include information regarding configuration of the virtual circuit, status of the virtual circuit (including counts of recent keep-alive message failure or success), and congestion at the sending node.

Embodiments of the invention are concerned with filtering emails having data therein identifying a link to a remote processing system, which, when activated, causes the recipient to retrieve data from the remote processing system.

Embodiments of the invention provide a method of modifying an electronic message during transmission through a communications network, said electronic message having a source address and a recipient address, the method comprising:

• • interrupting transmission of the electronic message;
  • identifying a link specified within the electronic message;
  • analyzing the electronic message on the basis of at least an attribute intrinsic to the received electronic message so as to classify the received message as either a first type of message or a second, different, type of message;
  • if the received message is classified as the first type of message, modifying the received electronic message so as to replace the link with an alternative network location, said alternative network location corresponding to a remote processing system different to that corresponding to the link; and
  • transmitting the modified electronic message.

In comparison to known methods, which either modify the links blindly or which perform analysis of the data to which the link is connected, embodiments of the invention selectively modify the link on the basis of various tests relating to attributes intrinsic to the email. This means that only those emails that present some sort of risk to the recipient are modified, and, because the criteria for performing the modification relate to attributes intrinsic to the emails instead of the content associated with the link, the delivery of emails is not significantly delayed by processes involved in retrieval and analysis of data from third party sites.

The invention provides a CTCS (China Train Control System)-2 train operation control system comprising ground facilities and a vehicle-mounted apparatus, wherein the ground facilities include a temporary speed limit server, a train control centre, a railway circuit, a ground electric unit and a transponder group; the temporary speed limit server generates a temporary speed limit command; the train control centre generates carrier frequency and low frequency coded messages and active messages according to rail zone state messages and the temporary speed limiting command; the rail circuit generates a modulation signal according to the coded message, sends the modulation signal, generates and sends a rail zone state message; the ground electric unit sends the active transponder messages to a transponder group; the transponder group sends a fixed transponder message and an active transponder message; and the vehicle-mounted apparatus includes a vehicle-mounted safety computer, a railway circuit message receiving module and a transponder message receiving module. The CTCS-2 train operation control system provided by the invention realizes automatic control of train operation based on train operation permission messages transmitted by the rail circuit and the transponder group.

According to some example embodiments, systems, apparatus, methods, computer readable media, and computer program products are provided for implementing a wireless shelf pusher activity detection system. One example apparatus is a monitoring device for monitoring theft or sales activity associated with a product pusher device. The monitoring device may include a sensor configured to detect movement of a pusher member of the product pusher device, a wireless communications interface, and a processor. The processor may be configured to receive at least one sensor signal from the sensor indicating movement of the pusher member, determine a product movement activity type based on characteristics of the at least one sensor signal, and generate, for transmission via the wireless communications interface, a pusher activity message indicating the product movement activity type.

Eager send data communications in a parallel active messaging interface (PAMI) of a parallel computer, the PAMI composed of data communications endpoints that specify a client, a context, and a task, including receiving an eager send data communications instruction with transfer data disposed in a send buffer characterized by a read/write send buffer memory address in a read/write virtual address space of the origin endpoint; determining for the send buffer a read-only send buffer memory address in a read-only virtual address space, the read-only virtual address space shared by both the origin endpoint and the target endpoint, with all frames of physical memory mapped to pages of virtual memory in the read-only virtual address space; and communicating by the origin endpoint to the target endpoint an eager send message header that includes the read-only send buffer memory address.

A pro-active message delivery system which routes digitally-encoded messages via public-switched telephone networks and wide area networks to most cost-effectively deliver the messages, subject to security, privacy, and availability considerations. In a preferred embodiment of the invention, digitally encoded messages entered into a wide area network, either directly or via a public-switched telephone network, are sent to their destination using the most cost-effective route, by calculating the cost of sending the message via the available routes, and selecting the lowest cost route. Generally, the lowest cost route might use the node on the wide area network closest to the recipient of the message, or might use or node located in an area which charges off-peak rates at the time of transmission.

Selecting application messages from redundant feed adapters for application-level data processing in a high speed, low latency data communications environment, including brokering establishment of an active message stream to a subscribing client device from an active feed adapter; brokering establishment of a backup message stream to the subscribing client device from a backup feed adapter; receiving active transport packets in a transport engine of the subscribing client device from the active feed adapter; receiving and buffering backup transport packets; identifying a missing active transport packet; determining whether a corresponding backup transport packet for the missing active transport packet has been received from the backup transport adapter; and replacing the missing active transport packet with the corresponding backup transport packet for further data processing if the corresponding backup transport packet for the missing active transport packet has been received.

Methods and systems for standby controller aided failover are provided. According to one embodiment, an active control channel and an active data channel are established by an active controller with a managed device via a management protocol. A standby control channel and a standby data channel are established by a standby controller with the managed device via the management protocol. A keep-alive message is periodically sent by the standby controller to the active controller. When a response to the keep-alive message is not received by the standby controller within a predefined time, failover from the active controller to the standby controller is initiated by: (i) taking over for the active controller; and (ii) notifying the managed device to direct subsequent management protocol messages to the standby controller via the standby control channel.

In a distributed computing system including a nodes organized for collective operations: initiating, by a root node through an active message to all other nodes, a collective operation, the active message including an instruction to each node to store operating parameter data in each node's send buffer; and, responsive to the active message: storing, by each node, the node's operating parameter data in the node's send buffer and returning, by the node, the operating parameter data as a result of the collective operation.

Data communications in a parallel active messaging interface (‘PAMI’) of a parallel computer, the PAMI composed of data communications endpoints, each endpoint including a specification of data communications parameters for a thread of execution on a compute node, including specifications of a client, a context, and a task, endpoints coupled for data communications through the PAMI and through data communications resources, including receiving in an origin endpoint of the PAMI a SEND instruction, the SEND instruction specifying a transmission of transfer data from the origin endpoint to a first target endpoint; transmitting from the origin endpoint to the first target endpoint a Request-To-Send (‘RTS’) message advising the first target endpoint of the location and size of the transfer data; assigning by the first target endpoint to each of a plurality of target endpoints separate portions of the transfer data; and receiving by the plurality of target endpoints the transfer data.

Controlling access to a resource in a distributed computing system that includes nodes having a status field, a next field, a source data buffer, and that are characterized by a unique node identifier, where controlling access includes receiving a request for access to the resource implemented as an active message that includes the requesting node's unique node identifier, the value stored in the requesting node's source data buffer, and an instruction to perform a reduction operation with the value stored in the requesting node's source data buffer and the value stored in the receiving node's source data buffer; returning the requesting node's unique node identifier as a result of the reduction operation; and updating the status and next fields to identify the requesting node as a next node to have sole access to the resource.

Methods, apparatus, and products are disclosed for reliable messaging using a message stream in a high speed, low latency data communications environment that include brokering, by a stream administration server, establishment of an active message stream to a subscribing client device from an active feed adapter; receiving, in a transport engine of the subscribing client device from the active feed adapter on an active message stream, active application messages encapsulated in active transport packets; receiving, by the transport engine from the active feed adapter, an active transport packet containing an active mapping; identifying, by the transport engine in dependence upon active sequence numbers, a missing active transport packet; identifying, by the transport engine, missing active application messages of the missing active transport packet in dependence upon the active mapping; and requesting, by the transport engine, transmission of the missing active application messages from the active feed adapter.

Methods, apparatus, and products are disclosed for synchronizing an active feed adapter and a backup feed adapter in a high speed, low latency data communications environment that include brokering, by a stream administration server, establishment of an active message stream to a subscribing client device from an active feed adapter, the active message stream capable of communicating active application messages; brokering, by the server, establishment of a backup message stream to the client device from a backup feed adapter, the backup message stream capable of communicating backup application messages; receiving an active feed adapter state in backup messaging middleware of the backup adapter from active messaging middleware of the active adapter; determining, by the backup feed adapter, whether a backup feed adapter state is synchronized with the active feed adapter state; and administering, by the backup feed adapter, operation of the backup adapter in dependence upon the determining.

In one embodiment, a network device determines a path from itself to a source device in a computer network, where the source device utilizes the path in reverse to reach the network device. Based on determining a reliability of the path in reverse, the network device may dynamically adjust one or more keepalive parameters for keepalive messages sent on the path. Accordingly, the network device may then send keepalive messages on the path based on the dynamically adjusted keepalive parameters.

A client and a host communicate in a packet data network including a plurality of routing nodes such as routers and firewalls. The host is configured to provide the client with a session and to detect the accessibility of the client by repeatedly sending keep-alive messages to the client. In order to reduce the traffic actually arriving at the client, at least some of the keep-alive message are adjusted such that their routing towards the client will be stopped before the client by storing in a Time-To-Live field specified in the Internet Protocol a value of maximum routing hops defined to correspond with the last routing node before the client on a route from the host to the client. The adaptation of the keep-alive message can also be configured to allow some keep-alive message to reach the client to occasionally test the communication path between the client and server.