81 results about "Transfer control protocol" patented technology

Local surgical cockpits comprising local surgical consoles that can communicate with any desired remote surgical module (surgical robot), for example via a shared Transmission Control Protocol/Internet Protocol (TCP/IP) or other unified open source communication protocol or other suitable communication system. The systems and methods, etc., herein can also comprise a modular approach wherein multiple surgical consoles can network supporting collaborative surgery regardless of the physical location of the surgeons relative to each other and/or relative to the surgical site. Thus, for example, an operator operating a local surgical cockpit can teleoperate using a remote surgical module on a patient in the same room as the surgeon, or surgeons located in multiple safe locations can telemanipulate remote multiple surgical robots on a patient in or close to a war zone.

The present invention provides efficient and effective quality of service for information that is time sensitive (e.g., real time data). An intermediate network communication system and method (e.g., a router) of the present invention performs cut through switching to reduce latency problems for time sensitive information. In one embodiment of the present invention, communication packet header information is encoded with a time sensitive identifier that identifies the information as time sensitive. In one exemplary transfer control protocol/internet protocol TCP/IP implementation of the present invention, time sensitive indication is provided in the link layer information. In one embodiment of the present invention, time sensitive information is dropped if the intermediate network device can not communicate the information within specified timing constraints. In one embodiment of the present invention time sensitive information is cut through routed on a virtual channel and pre-empts non time sensitive information. In one embodiment a communication path probe is cut through routed via intermediate network devices to establish a communication path before other information is communicated from a originating source to a final destination. In one embodiment the present invention leverages previously collected information to establish a communication path. In one embodiment the present invention, an intermediate network device establishes a second communication link if a first communication link is unavailable.

The present invention provides a transfer control protocol handoff notification (TCPHN) mechanism for a wireless network by which hosts connected through the wireless network via a transfer control protocol (TCP) connection can be notified in the event a handoff occurs. The TCPHN mechanism allows hosts connected in TCP to avoid TCP timeouts and reduce any adverse effect on transmission performance. The TCPHN mechanism of the present invention can be used in relation to any TCP connection between any transmitting and receiving host where at least one of the transmitting and receiving hosts is mobile and subject to handoffs. In one embodiment for example, the TCPHN mechanism is used in relation to a TCP connection between a mobile host in a wireless network and a non-mobile server host in a connecting Internet protocol (IP) network.

A device, method, system and computer readable medium allows for a fast recovery of a communication connection in response to a newly assigned Wide Area Network (“WAN”) Internet protocol (“IP”) source address. In an embodiment of the present invention, a device provides communication between a WAN and a short distance wireless network. The device comprises a memory to store a first and a second WAN address for the device and a router software component. The processor and router software component transfers a first plurality of packets between the device and the wide area network using the first wide area network address. The processor and router software component discontinues the transfer of the first plurality of packets responsive to receiving the second wide area network address and transfers a second plurality of packets between the device and the wide area network using the second wide area network address. The second newly assigned WAN address may have been assigned by the WAN after a disconnection of communication between the device and a server in the WAN. In an embodiment of the present invention, the router software includes a plurality of private IP addresses for respective terminals, in the short distance wireless network, associated with the WAN IP address. In an embodiment of the present invention, a Point-to-Point (“PPP”) connection or Transfer Control Protocol (“TCP”) connection is discontinued and then initiated in response to a newly assigned WAN IP address in order to quickly recover a communication connection between terminals in the short distance wireless network and the WAN.

The invention discloses a data transmission method and a virtual peer-to-peer network for data transmission, and the data transmission method comprises the following steps: increasing a virtual IP layer at an IP layer of an original (TCP/IP, Transfer Control Protocol/Internet Protocol) network protocol stack of a client, thereby obtaining the public network IP address which corresponds to the virtual network IP address from a server and packaging the virtual network IP address as the corresponding public network IP address when taking the virtual network IP address as the target network IP address; and obtaining routing path information to the public network IP address from a routing information table stored in the server and carrying out the corresponding treatment according to the obtained routing path information. When a VPN network is constructed by applying the invention, the server does not need to forward data any longer, thereby reducing the data transmission time delay, simplifying the requirements on the performances of the server and the bandwidth and improving the network transmission efficiency.

The invention relates to a network speed test method and a network speed test system. The method includes the following steps: a network speed test request is sent into a waiting queue of a server by a client to be queued; if the judgment result of the server is test starting, then the server judges the variety of a test mode; if the test mode is pressure test, then the server sends a speed-testing command to the client, and cooperates with the client to carry out a TCP (transfer control protocol) network speed test and/or an HTTP (hypertext transfer protocol) network speed test; if the test mode is sequence test, whether the TCP network speed test and/or the HTTP network speed test are/is executed by the current server is judged, if so, then a waiting command is sent to the client, and if not, then the server cooperates with the client to carry out the TCP network speed test and/or the HTTP network speed test. The invention can visually and objectively test the speed of all broadband networks to provide reliable technical support for users to obtain accurate bandwidth data of operators.

A method of generating an annotated network topology of a network is described. The method includes determining available bandwidth “B” of a network on a network path connecting a pair of endpoints by performing Transfer Control Protocol (TCP) flows between the pair of endpoints, the network having a plurality of network paths, identifying a bottleneck link in the network path, and annotating all edges in a network path, wherein available bandwidth annotation of links inside the network is determined using end-to-end network measurements. A system for generating the annotated network topology of a network is also described.

Exemplary methods, apparatuses, and systems include a client virtual machine processing a system call for a device driver to instruct a physical device to perform a function and transmitting the system call to an appliance virtual machine to execute the system call. The client virtual machine determines, in response to the system call, that an established connection with the appliance virtual machine has switched from a first protocol to a second protocol, the first and second protocols including a high-performance transmission protocol and Transmission Control Protocol and Internet Protocol (TCP/IP). The client virtual machine transmits the system call to the appliance virtual machine according to the second protocol. For example, the established connection may switch to the second protocol in response to the client virtual machine migrating to the first host device from a second host device.

Systems and methods for transferring, processing and displaying multiple images using a single transfer request such as a Transfer Control Protocol/Internet Protocol (TCP/IP) transfer request are disclosed. The method may generally include requesting a document, e.g., an HTML document, that references a composite image containing multiple image portions, splitting the composite image into the multiple image portions, determining a layout of the image portions in a client browser, e.g., a web page browser, and laying out the image portions in the client browser according to the determined layout. The splitting of the composite image into the multiple image portions may utilize Cascading Style Sheets (CSS), e.g., using a CSS clip function for each image portion, and may use absolute positioning of the image portions within the composite image. The determining the layout and the laying out of the multiple image portions may be implemented utilizing JavaScript.

A router and method for protecting transfer control protocol (TCP) ports of a local computer include receiving a SYN packet from a remote computer, recording a timestamp of the SYN packet, and counting a number of suspicious TCP connections established during a first time interval before the timestamp of the SYN packet. The router and method further include identifying the remote computer as an attacker if the counted number exceeds a preset maximum connection value, and rejecting all TCP packets transmitted from the remote computer during the second time interval after the timestamp of the SYN packet.

The invention discloses a communication standard of automated testing for a monitoring system, which is characterized in that: a test tool is communicated with a central control module, firstly, the test tool is registered, and then establishes a TCP (Transfer Control Protocol) communication with the central control module, and is finally interacted with a specific command of a user interface. The TCP communication flow of the central control module and the test tool is divided into three layers for processing: for an XML (extensible markup language) operation layer, when sending data, the XML operation layer receives the specific command of a tool communication layer, the specific data is packaged as XML data, and then the XML data is transferred to a TCP interception layer for sending; when receiving the data, the XML operation layer receives the original XML data of the TCP interception layer to parse the original XML data to get a specific result, and then transfers the specific result to the tool communication layer for processing; and the cross-layer operation is realized by callback and call between the layers. The communication standard of automated testing for the monitoring system is used for intensively controlling a plurality of test tools to concurrently work, accordingly, the test speed is quickened up, the test quality is improved, and the object of faster and better development of software products is achieved.

The invention discloses a method for realizing a firewall in a household gateway, and relates to a method preventing an internet access in the manner of detecting the internet access through an SPI (stateful packet inspection). The SPI-typed firewall means that each connecting information (including socket pairs which comprises a source address, a destination address, a source port and a destination port, a protocol type, a TCP (transfer control protocol) connection state, an overtime hour and the like) is detected for judging whether the firewall filters a data packet. By the adoption of the method, besides finishing the work of packet filtering of a simple packet filtering firewall, a table of a tracing and connecting state is maintained in the own internal memory, thus the firewall is provided with higher safety compared with the simple packet filtering firewall.

The invention discloses a CC (Challenge Collapsar) attack protection method and device. The method comprises the steps of obtaining IP (Internet Protocol) address of a client which initiates a transmission control protocol TCP connection request; determining whether the TCP connection request of the client is a CC attack or not according to the IP address; and rejecting an access of the client if the TCP connection request of the client is the CC attack. According to the technical solution provided by the embodiment of the method and the device, the request initiated by an abnormal client can be recognized and filtered, thereby rejecting the access of the client, reducing the use of server resources and improving a CC attack protection effect.

The invention discloses a user identification method, apparatus and device, and a computer storage medium, and the method specifically comprises the steps: obtaining Internet access data of a target user, the Internet access data comprising at least two indexes; determining user side time delay according to time information of three-way handshake connection of a transmission control protocol TCP in the Internet access data; determining user portrait information of the target user in the target application scene according to the Internet access data and the user side time delay, the user portrait information comprising at least two indexes; and when at least two indexes in the user portrait information meet corresponding preset conditions, determining that the target user is a poor-qualityuser. According to the embodiment of the invention, the network quality condition of the user side can be deeply mined, and the positioning accuracy of the user with poor network perception quality isimproved.

A telephony system (10) for communication over a network includes a kernel space (110), a media express processor operating environment (120) for providing a set of software facilities for task synchronization, and a user space (130). The kernel space includes a board support package (111), a ucLinux module (112), a digital signal processor interface module (113), a transfer control protocol/Internet protocol (TCP/IP) stack (114) for performing TCP/IP, and a real-time transport protocol/real-time transport control protocol module (115). The user space includes a digital signal processor manager (132), an H.323/session initiation protocol (H.323/SIP) stack (133) for performing H.323 protocol or SIP, a system managing module (134), an event dispatcher (135), a line state machine (136), a call manager (137), a call logging module (138), and a directory module (139) for storing, editing, searching and removing contact information of users.

The invention discloses a TCP (transmission control protocol) header compression method in wireless IPv6 network, belonging to the technical field of improving the compression ratio and robustness of a wireless link. The invention emphasizes the three compression states, three working modes, W-LSB (window-based least significant bit) algorithm and the like of ROHC (robust header compression). A classification mode of the TCP header field is provided, and the profile of TCP/IP compression is written according to the ROHC profile specification; the sliding window width is dynamically adjusted to adapt to the change characteristics of the wireless link, and performance simulation and analysis are performed on the provided method; a test information source of ROHC is designed to facilitate the writing and test of the TCP/IP compression profile of ROHC; and according to the TCP/IP header compression technology and performance in a wireless IPv6 (internet protocol version 6) network, the imperfection of the ROHC and TCP compression scheme is improved, and the result is verified through a simulation test in a prototype system.