185 results about "Network availability" patented technology

A method for facilitating login using adaptive authentication. The method uses different authentication methods and different data protection methods depending on the user location, availability of network, importance of the data.

A distributed gateway for controlling computer network data traffic dynamically reconfigures traffic assignments among multiple gateway machines for increased network availability. If one of the distributed gateway machines becomes unavailable, traffic assignments are moved among the multiple machines such that network availability is substantially unchanged. The machines of the distributed gateway form a cluster and communicate with each other using a Group Membership protocol word such that automatic, dynamic traffic assignment reconfiguration occurs in response to machines being added and deleted from the cluster, with no loss in functionality for the gateway overall, in a process that is transparent to network users, thereby providing a distributed gateway functionality that is scalable. Operation of the distributed gateway remains consistent as machines are added and deleted from the cluster. A scalable, distributed, highly available, load balancing network gateway is thereby provided, having multiple machines that function as a front server layer between the network and a back-end server layer having multiple machines functioning as Web file servers, FTP servers, or other application servers. The front layer machines comprise a server cluster that performs fail-over and dynamic load balancing for both server layers.

A Multi-Interface Mobility Management (MIMM) client is provided on a mobile Multi-Interface Device (MID) to support seamless network connectivity and switching of the MID. The MIMM client communicates with a MIMM Server. The MIMM Server collects information from MIMM Clients and provides information to the MIMM Clients pertaining to the network(s) to which the mobile MID has access, such as information concerning the availability of a network, the quality of network connectivity, etc. The MIMM Client is responsible for determining whether and when a handoff or roaming operation should be initiated by the mobile MID, and which network interface the mobile MID should use after the handoff/roam operation has been completed. The MIMM Client also is responsible for performing mobility-related functions that are required prior and subsequent to the handoff/roam operation. The MIMM Client uses the information received from the MIMM Server in order to make these determinations.

Methods and apparatus for performing adaptive compression are disclosed. A data stream is divided into a plurality of data segments. When one of the plurality of data segments is compressed, it is determined whether the compression has been successful. When the compression has been successful, a data segment in proximity to the compressed segment (e.g., the next data segment in the plurality of data segments) is compressed. However, when the compression has been unsuccessful, one or more of the plurality of data segments are skipped (i.e., not compressed) before compression is attempted on another one of the plurality of data segments. When a data segment is compressed, the compression algorithm (and any associated parameter(s)) that is applied is selected based upon a variety of factors, such as the length of the data segment, CPU speed, CPU availability, and/or data throughput such as the network bandwidth or network availability (e.g., where data is to be transmitted via a network interface). The compression algorithm (and any associated parameter(s)) may also be selected, at least in part, based upon a set of user preferences that indicate a preference between the speed with which compression is performed and the amount that a data segment is compressed.

The described implementations relate to automatic network selection in relation to wireless mobile devices. One method can be applied to a mobile device that has both Wi-Fi and cellular capabilities. The method can attempt to identify Wi-Fi network availability for the mobile device. This method also evaluates whether to configure the mobile device to accomplish data communication over an identified Wi-Fi network or a cellular network.

A method and apparatus that enable a mobile electronic device to automatically and seamlessly maintain optimal network connectivity by selectively connecting to the most appropriate, currently available data or communications network. Guidelines for what constitutes optimal network connectivity are provided by pre-selected user preferences or objectives. These are combined into one or more rules that can be interpreted by a software module operating on the mobile electronics device, and used to switch between the available networks in a way that makes intelligent use of the mobile device resources, and provides seamless support for any applications running on the device while roaming through regions of changing network availability, or as the service quality of available networks varies.

A time simulation technique for determining the service availability (or unavailability) of end to and network connections (or paths) between source and sink nodes is disclosed. The method includes skips of (a) selecting a link between two network nodes; (b) performing a simulated link failure on the selected link; (c) sell sting a connection bet two network source and sink nodes; and (d) determining the unavailability and availability of the connection on under the simulated link failure condition. The method further includes (e) of repeating (c) and (a) and (b); and (f) of summoning the unavailability and availability of connections after each repetition until a predetermined number of connections have been selected, and until a simulated link failure has been performed on all links; or until the summed unavailability and availability has been determined to converge, whichever is earlier.

The invention provides a monitoring system and a monitoring method for monitoring performance of a cloud host. The monitoring method comprises the following steps: collecting a virtual resource utilization state of the cloud host by simultaneously using a cloud host Agent module, a calculation node Agent module and a station monitoring module for monitoring to obtain the monitoring data; accessing to a KVM (K Virtual Machine) management program through Libvirt API (Application Program Interface) of the calculation node Agent module and calling the corresponding Libvirt API to browse and obtain all the monitoring data of the cloud host; monitoring the network availability of the cloud host through at least one station monitoring module, and collecting and calculating monitoring data of a cloud platform through at least an alternate manner, and then storing the monitoring data in a database; and alarming and monitoring all the monitoring data through an alarm module according to alarm setting rules which are set by users. Through the monitoring system and the monitoring method, the users can comprehensively know the available state of the cloud host according to monitoring items and alarm strategies, thereby preventing the cloud host Agent from excessively occupying virtual resources of the cloud host when the monitoring projects are excessive.

The invention discloses a method for defending against denial-of-service attacks in TCP/IP networks. The method comprises: randomly sampling TCP, UDP and ICMP flow; counting and calculating the rate of each flow; detecting flow proportion characteristics and flow distribution characteristics; verifying the credibility of corresponding source host computers; self-learning black-white lists and DoS-attack characteristic tables according to detection result and source-host-computer identity authentication result and utilizing the black-white lists and the DoS-attack characteristic tables to filter the flow, release normal flow and blocking denial-of-service attacks. By utilizing the invention, the denial-of-service attacks can be detected and blocked so as to guarantee network availability, prevent network denial of service attacks from occurring and provide network users with a secure network environment.

An apparatus and method for managing and transporting virtual disks over a network to networked stations is disclosed. The apparatus comprises a data storage subsystem and a data processor connected thereto via a network. The data processor includes a virtual disk interface controller to interface with the storage subsystem in handling the input and output for the storage subsystem. The storage subsystem manages a pool of storage blocks in the form of a plurality of virtual disk images and transports the virtual disk images over the network to the virtual disk interface controller. A virtual disk image is emulated as a virtual disk by the virtual disk interface controller and presented to the data processor. The architecture for management and delivery of disk images and the data structure for maintenance of disk images facilitate software deployment and installation onto the networked diskless computers enable highly efficient system administration on the whole network to maximize the network availability.

A method and system are provided that extend the lifetime of sensor nodes in a wireless sensor network while ensuring network availability. An availability level is set for ensuring network connectivity corresponding to importance of network connectedness. An operation probability that a sensor node is in operation is calculated. A total sleeping time of the sensor node is calculated that minimizes the operation probability while maintaining the availability level.

Systems, methods, apparatuses, and computer-readable media for are provided for providing a navigation route based on network availability. In one embodiment, a method includes receiving a request for a navigation route. The method may further include providing the navigation route, the navigation route taking into account accessibility information relating to accessibility of at least one wireless network at different geographic locations along the navigation route and device specific information relating to attributes of a mobile device. The accessibility information may include data collected by different mobile devices at different geographic locations. The accessibility information may also be stored at a centralized server.

A network element for handling network availability information represented as presence information, where the network element includes a receiving unit for receiving status information in a network availability element and a converting unit for converting the status information into a presence information data format. The network element also includes a generating unit for generating a request that includes the presence information data format. For certain status events the network availability includes at least one child. In one embodiment, the at least one child of the network availability element is a network element for presenting registration status and the network availability element is a part of a person element. The registration status is represented in a state element which includes one of an active element or a “terminated” element. In another embodiment, the at least one child of the network availability element is a network element for presenting registration status and the network availability element is a part of a device element. The registration status is represented in a state element which describes if a device is attached to a particular network and includes one of an active element, a “terminated” element or out-of-coverage element.

Communication devices capable of at least two communication modes (e.g. WLAN, WMAN and WWAN and/or wired modes) can be configured to optimize communications using a policy-based mechanism to configure connections and routes. A rules engine evaluates its policies on a state change (e.g. network availability, time of day, etc.) to configure a routing table and, together with communication APIs, provides an appropriate connection to an application for its respective communications. Policies may be responsive to various factors such as Radio Access Technology (high/low bandwidth), cost, presence, time of day, location, application type and quality of service (QoS) requirements among others to optimize communications.

The invention relates to a system and a method of a mobile terminal for selecting an optimal communication network. The system comprises a network availability detection module, a network quality detection module, a network quality test server, a network selection rule configuration module, a service perceiving module, a network selecting module and a network switching module, wherein the network availability detection module is used for detecting the network availability and connectivity of a communication network involving the mobile terminal in real time; the network quality detection module and the network quality test server are used for detecting the communication quality of an available and connected communication network; the network selection rule configuration module is used for configuring the network selection priority according to user demands; the service perceiving module is used for detecting the service currently used by the mobile terminal in real time; the network selecting module is used for selecting an optimal communication network according to the detection result of the network communication quality, the configuration result of the network selection priority and the service currently used by the mobile terminal; and the network switching module is used for switching the communication network currently used by the mobile terminal into the optimal communication network. According to the system and the method of the mobile terminal for selecting the optimal communication network, the demands on network quality, use expense and service requirements are comprehensively considered and users can make full use of the network and obtain the maximum profit on the premise of guaranteeing the communication quality.

A system and method for automated monitoring of availability in xDSL access networks are disclosed. An xDSL access network with network availability monitoring generally comprises a measurement device in communication with a DSL access multiplexer (DSLAM) at a central office (CO), a broadband remote access server (BRAS) in communication with the DSLAM, a remote authentication dial-in user service (RADIUS) server in communication with the BRAS, and a data collector at a network operations center (NOC) in communication with the RADIUS server and the measurement device, the data collector being configured to retrieve data from the RADIUS server, the measurement device being configured to automatically establish a PPP session with the BRAS and the RADIUS server being adapted to collect data relating to the PPP session. The measurement device is preferably connected to the DSLAM via an xDSL loop terminating at a DSLAM monitoring port. In addition, the PPP session is preferably authenticated.

The invention provides an SNMP (Simple Network Management Protocol) and HTML5 (Hypertext Markup Language 5)-based method for realizing web network topology. The method comprises the steps of: S1, selecting user-defined topology or self-discovered topology; S2, when selecting the self-discovered topology, detecting all resources by utilizing the SNMP, and writing the detected self-discovered network topology resources into a database; S3, according to the self-discovered network topology resources, analyzing to obtain a self-discovered network topological relationship; S4, according to the attributes of the topology resources, displaying the topology resources in a network topology editing page canvas, calculating coordinates of each topology resource in a network topology editing page, and drawing topology management connecting lines by utilizing the drawing function of the canvas of the HTML5 according to the self-discovered network topological relationship; and S5, conducting network usability detection to the topology resources according to the IP (Internet Protocol) of the topology resources, and writing the detected problems into an alarm subsystem for alarming and prompting. Through the method, the network topology presentation of the B/S (Browser/Server) structure can be done through the HTML5, and a user can select user-defined topology or self-discovered topology.

A method of monitoring the availability of a network on a monitor web page, includes the steps of: reading query information and depositing query requests into a corresponding one of a plurality of request queues; reading the query requests from the corresponding request queue and sending the query requests to at least one remote network device by sending calls over the IP or SNA network; receiving a reply to the calls from the at least one remote network device indicating an availability status of the at least one remote network device and processing the availability status; depositing the processed availability status in a Web Site Queue; and retrieving the processed availability status from the Web Site Queue and displaying status information for the at least one network device on the monitor web page, the status information being derived from the processed availability status.

The invention discloses a method and a device for preventing network safety from desynchronizing. The method comprises the separate processing of safety parameters of the USIM card part of UE (User Equipment) on a suitable occasion or the processing of safety parameters of the ME part of the UE and a network side when the UE switches networks. According to the embodiment, by suitably changing the safety parameters, the invention can effectively avoid the situation of network access failures of terminals caused by the network safety desynchronization, and improve the network usability and the safety of switching corresponding occasions.

A method and system for performing a backup operation at a local-area network (LAN) including at least one LAN device and a LAN gateway (GW) includes adding backup data to a local backup archive coupled to the LAN. A request to send backup data may be sent to a data center accessible via a wide-area network (WAN). The data center may indicate authorization to send the backup data. The local backup archive may then be sent to the data center, which may generate a secure backup archive at one or more remote locations. The local backup archive may be sent at an advantageous time with respect to LAN/WAN network availability. After the secure backup archive has been successfully created, the GW may be notified and may then delete the local backup archive.

A network appliance may be configured to transmit data over a multiple networks from one or more client applications, for example, enterprise business applications. The network appliance may receive and analyze information regarding the multiple different networks transmitting over different transmission media, e.g., terrestrial and wireless, and to switch a client application from a primary network to a backup network based on a detected change in network availability. For example, the determination to switch transmission networks may be based on an outage of a primary network, or based on an efficiency or cost analysis, along with other factors. The network appliance may be in communication with an appliance network server, for example, to receive and compile statistics and remotely reconfigure a plurality of network appliances installed in remote locations.

The invention relates to a method and device for monitoring a packet loss rate based on an FPGA (Field Programmable Gate Array). The method comprises the following steps of: receiving a message, which is sent by the FPGA of an opposite terminal, by the FPGA of a home terminal; when the message is a first ordinary message, recording a receiving count value in the event of receiving the first ordinary message; when the message is a first protocol message, filling the currently received count value in the first protocol message; and calculating the packet loss rate of a home terminal link according to a currently sent count value carried in the first protocol message, a previously sent count value, a previously received count value, the currently received count value and a pre-set protocol message sending spacing interval. In the invention, according to a requirement for measuring the packet loss rate, a generation policy of the protocol message is configured; the protocol message for measuring the packet loss rate is sent; the occupation of a limited network bandwidth resource is reduced; simultaneously, by using the original ordinary message in the network, in the event of not influencing the available bandwidth of the network, the packet loss rate in the link is recorded and monitored; the influence to the network environment in a later period is reduced; and the network availability is improved.