76 results about "OSI model" patented technology

This invention is an apparatus and a method that selects the optimum location of a service on the Internet according to the user's geo-location and the configuration of the invention by transparently altering the DNS messages. In the preferred embodiment, the invention operates at OSI model's data link layer and it is located in front of the DNS server so that it does not require any modification in the existing DNS or IP network setup or on the application servers. It provides a fast and transparent method of locating an Internet service without the overhead of server scripts, HTTP redirects, or extra steps by the user to find the desired location or content.

A packet forwarding method for optimizing packet traffic flow across communications networks and simplifying network management. The invention provides look-up-free and packet-layer-protocol transparent forwarding of multi-protocol packet traffic among Layer-N (N=2 or upper in the ISO OSI model) nodes. The invention enables flexible and efficient packet multicast and anycast capabilities along with real-time dynamic load balancing and fast packet-level traffic protection rerouting. Applications include fast and efficient packet traffic forwarding across administrative domains of Internet, such as an ISP's backbone or an enterprise virtual private network, as well as passing packet traffic over a neutral Internet exchange facility between different administrative domains.

Methods and systems for maintaining high-availability in a computer network using intelligent failover are presented. In a network switch running an OSI model layer-2 or higher protocol on its external links, the protocol state information is monitored to determine failover status of the link to avoid identifying external link failures due to link flapping. One such protocol is the spanning tree protocol. Additionally, flexibility in failover is provided using configurable triggers to define external failure events. The triggers initiate a link drop of one or more internal links of the network switch in response to an external failure event. The link drops, in turn, initiate failover of an attached computing device to a redundant link through a network interface teaming/failover arrangement whereby the computing device switches to an alternative network interface accessing the network through a redundant path. Failover can be selective depending upon VLAN and trunking configurations.

Systems and methods for regulating the throughput of a channel between a gateway and one or more subscriber terminals are disclosed. Various embodiments of the invention provide for monitoring link utilization between a gateway and a subscriber terminal at, for example, the physical layer of the OSI model. Based in part on the link utilization the link throughput may be throttled at a layer higher than, for example, the transport layer. Regulating may occur by advertising a decreased TCP window size or intelligently dropping packets. In another embodiment, a subscriber terminal may estimate the signal to noise ratio of a forward link channel and communicate this SNR to the gateway. The gateway may adjust the modulation and/or coding of the signal in response to the SNR. The gateway may also throttle deliver of packets in response to changes these changes in the modulation and/or coding of the signal.

The invention discloses a wireless intelligent sensor network protocol (ATZGB-SleepTree) with ultra-low power consumption. The protocol includes a physical layer, an MAC (media access control) layer, a link layer, a network layer and an application layer according to an OSI (open system interconnection) reference model. A traditional wireless sensor protocol and even an existing ZigBee protocol are quite difficult to meet the requirements of low power consumption, low cost, high fault tolerance and the like of a wireless sensor, and under the circumstance, the ATZGB-SleepTree protocol arises at the historic moment. The ATZGB-SleepTree constructs a wireless network which is low in cost and power consumption, high in sensitivity, reliability and real-time control and transmission, highly flexible in work pattern and configuration, automated in link management, capable of achieving AES (advanced encryption standard) data encryption, supportive to multiple bands and multiple wireless rates and capable of achieving synchronous sleep and synchronous wake-up of all nodes of the whole network, routing fault-tolerance and automatic recovery and is used for substituting for traditional wireless and cable network transmission modes.

Systems and methods for implementing a satellite network, are described. The system includes satellite gateways in communication with subscribers over a satellite communication network. The satellite gateways send network communications to the subscribers and receive network communications from the subscribers. The system further includes a first core node in communication with at least one of the satellite gateways. The first core node provides networking services, at L2, to a first subset of subscribers. The system further includes a second core node in communication, at L2, with one of the satellite gateways and the first core node. The second core node provides the networking services, at layer-2 of the OSI model, to a second subset of the subscribers. In response to failure of at least one of the networking services in the first core node, the second core node providing the at least one of the services to the first subset of the subscribers.

Systems and methods for providing mobility across satellite beams, are described. The system includes a first core node, a second core node in communication with the first core node at layer-2 of the OSI model (L2), and a first gateway in communication, at L2, with the first core, the first gateway configured to provide access to a first spot beam at a first location. The system further includes a second gateway in communication, at L2, with the second core node, the second gateway configure to provide access to a second spot beam at a second location, and a mobile device, at the first location, in communication with the first gateway via the first spot beam, wherein the mobile device is assigned an IP address by the first core node. The mobile device moves from the first location to the second location. Further, the first gateway, in response to the mobile device moving from the first location to the second location, notifies the second gateway, through the first core node and the second core node, that the mobile device is moving to the second location, and transmits the session information to the second gateway, and the second gateway, in response to the notification, maintains connectivity with the mobile device using the IP address.

A method and system for data link layer packet processing which unidirectionaly captures, filters, enqueues, processes and forwards packets between multiple network interfaces are introduced. Fast and intelligent data link layer network applications or equipment can implemented by programming the invention. Each direction of packet flow in this system is independently processed from others. This feature provides very flexible packet processing and very fast packet forwarding since each flow can be implemented in an isolated process, application or a device. As the system operates at OSI model's data link layer (e.g. Ethernet), installing the system into a functional network does not require any change in the configuration of network applications or equipment. This system can be utilized for employing various networking functions such as network emulation, bridging, firewall, virus detection, bandwidth management, traffic monitoring and in-line intrusion detection, etc.

A method for speeding up the pass time of an executable (an HTML file, a script file, a web page, an EXE file, an email message, and so forth) through a checkpoint (e.g. a gateway) in which the integrity of said executable is being tested, said method comprising: receiving and accumulating the parts of said executable that reach to said checkpoint; testing the integrity of the accumulated parts; releasing and sending the accumulated parts that have been indicated as harmless to their destination in an accelerated manner; releasing and sending the accumulated parts that have not been indicated as harmless or malicious to their destination in a moderate manner; and upon indicating the maliciousness of said accumulated parts, performing an alert procedure. According to a preferred embodiment of the invention, receiving and/or sending data is carried out at the lower levels of the OSI model, especially at the Network level.

A system and method are provided for controlling information flow from a channel service module (CSM) in an asymmetric channel environment. The method provides information for transmission to an OSI model PHY (physical) layer device with a channel buffer. The PHY device channel buffer current capacity is estimated. Information is sent to the channel buffer responsive to estimating the channel buffer capacity, prior to receiving a Polling Result message from the PHY device. Initially, Polling Request messages are sent to the PHY device, and Polling Result messages received from the PHY device, as is conventional. In response to analyzing the Polling messages, a transmission pattern is determined, which includes the amount of information to transmit and a period between transmissions.

Method of switching packets in a transmission medium comprising multiple stations which are connected using different links, which is characterized by the establishment of different links (9, 10, 11 and 12) in the same or different media, with different communication characteristics in a single medium, and by a frame switching process associated with links.

Thanks to this it is possible to send frames from one set of equipment (2) connected to a transmission medium (1) to any other connected to that same medium (4, 5, 6 and 7), even though there is no direct link between them, with all the processing being carried out in level 2 of the OSI model.

The invention provides an industrial communication protocol reverse analysis method, which comprises the steps of receiving a data acquisition instruction, acquiring a first data packet in an industrial control network data stream and obtaining a data classification; receiving a data packet reconstruction instruction, and analyzing the first data packet from bottom to top based on an OSI model toobtain a second data packet; receiving a data packet deep analysis instruction, and analyzing the private protocol and the public protocol according to the second data packet to obtain a protocol format, thereby solving the problem of insufficient analysis depth of the current industrial control network data packet, and since most industrial control protocols belong to the private protocol and theprotocol format is defined by a manufacturer and is not public, a user cannot comprehensively know the content in the industrial control network data packet.

The invention provides a dynamic simulation system and a simulation method of an electric power data network. The dynamic simulation system comprises an agent terminal and a master control terminal, wherein the master control terminal is used for transmitting an instruction to the agent terminal; the agent terminal is used for receiving the instruction and subsequently carrying out queue control and dynamic increase and decrease to a terminal simulation threading, and furthermore transmitting testing data to a tested unit; and the testing data are fed back to the master control terminal after being processed by the tested unit. According to the dynamic simulation system and the simulation method, with the dynamic increase and decrease of the multiple threading and the multiple agents, the OSI (open system interconnect reference model) model layering realization and a simplification simulation mode of electric power stipulations, the simulation problem of dynamic transition and power stipulations in network simulation of a large scale is solved.

An error detection system and methodology where the undesirable consequence of encapsulation (additional latency or delay) for virtualization applications such as i-PCI or iSCSI is minimized for the vast majority of data transactions. Cyclic Redundancy Checks (CRCs) and checksums are executed simultaneously in parallel, immediately on reception of a data packet regardless of the relative processing order in relation to the OSI model.

The invention relates to a method for encrypting a URL (uniform resource locator) address in order to prevent a public network user from counterfeiting a URL address, preventing an unauthentic Frontend Server from counterfeiting an address and preventing overdue URL address accessing. Various methods for preventing content hotlinking such as pictures in a website are provided, and the most common method is that an access source is judged according to HTTP (hyper text transport protocol) access head information; readers understanding TCP/IP (transmission control protocol/internet protocol) communication all know that HTTP head information processing is executed on an application layer of an OSI (open system interconnection) model, so that some pieces of false HTTP head information are compiled and sent to a server without special technologies or tools. Prevention of hotlinking according to the HTTP head information is a typical method for preventing a gentleman not a black man, and the security problem can be thoroughly solved by URL address encrypting only.

The invention provides a cross-platform real-time redundant network switching system and method. The method comprises the following steps: employing a 10-gigabit redundant Ethernet card of an FPGA asa main control chip, forming an activation link and a standby link through configuration, recognizing the link states of the two links at regular time, and forming an external link through active switching according to the link states. According to the logic design of the FPGA, sending and receiving data structures of the FPGA and correlation among the multiple data structures are set, sending andreceiving data linked lists are formed respectively, and interruption is triggered through interruption number control, so that data is read or stored into the corresponding data linked lists. The main control chip adopts the FPGA, the dual-redundancy network card is directly and effectively configured on a physical layer, and the constraint that a traditional network card can only be configuredthrough an application layer is broken through. Fault monitoring and link switching are directly carried out on the bottommost physical layer of the OSI model, so that the switching time can be effectively prolonged, and the limitation of an operating system and a driver on a network card is eliminated.

The invention provides a method for operating a wind power electric field power network system, especially a method for conducting networking in an electric field management system, i.e. an electric field main station and each wind power turbine, i.e. WKA through a central network. The central network is used for conducting a bidirectional data transmission and is implemented as a circular net. Based on an OSI hierarchical model (42-48), data is transmitted from a first layer which is a data physical layer and a hardware layer (42) to a second layer, i.e. Ethernet or Isonet controller (43). An IP layer, i.e. a third layer of the OSI model, a UDP/TCP layer, i.e. a fourth layer of the OSI model, and a RPC layer, i.e. a fifth layer of the OSI model are connected in a manner of bridge joint through a WPP real-time drive (49). A direct connection of the WPP real-time drive (49) is formed between the second layer, i.e. the Ethernet or the Isonet controller (43) and a seventh layer, i.e. a WPP application (48).

The invention provides a method for releasing a route, which is applied to a third-layer network in an open system interconnection (OSI) model, the network comprises a control plane network element and a forwarding plane network element which are connected with each other, and the method comprises the following steps that: the forwarding plane network element receives a message of which a source IP address is a first IP address, and the forwarding plane network element determines that the first IP address is not authenticated; the forwarding plane network element sends an authentication request including the first IP address to a control plane network element, and the forwarding plane network element receives first session information from the control plane network element; and the forwarding plane network element issues first routing information according to the first session, wherein the destination address of the first routing information is the first IP address. According to the method, the problem that in a third-layer network of an OSI model, under the condition that user equipment is connected with a plurality of APs of different BNGs or routers are switched back and forth, the state of network interruption cannot be kept can be solved.