5194results about "Store-and-forward switching systems" patented technology

A method for making a hypermedium page interactive, the hypermedium page displayed by a network browser, includes the step of selecting a hyperlink on the hypermedium page displayed on a client machine, the hyperlink identifying a desired computing resource. A hyperlink configuration file is retrieved, the hyperlink configuration file corresponding to the hyperlink and identifying a server machine. A client agent is started on the client machine. The client agent creates, via a terminal services session, a communication link to a virtual machine executing on the server identified by the hyperlink configuration file, the virtual machine executed by a hypervisor executing in the terminal services session provided by an operating system executing on the server. The client agent receives data from the virtual machine and displays, on the client machine, the received data without intervention by the network browser.

A data collection system for, and methods of, providing reliable store-and-forward data handling by encoded information reading terminals can utilize ad-hoc peer-to-peer (i.e., terminal-to-terminal) connections in order to store data that is normally stored on a single terminal only, in a redundant manner on two or more terminals. Each portable encoded information reading terminal can be configured so that when it captures data, a software application causes the terminal to search out nearby peer terminals that can store and / or forward the data to other peer terminals or to a data collection server, resulting in the data having been stored by one or more peer terminals that are immediately or not immediately accessible by the data-originating terminal.

Systems, methods, devices, processes, procedures, algorithms, networks, and network elements are described for time-scheduled and / or time-reserved dat networks. Invention provides capabilities for synchronizing data networks and / or data network links; for establishing time-schedules, time-reservations, time-schedule reservations, and / or reservation time-slots for packets, cells, frames, and / or datagrams; and for transferring, transmitting, switching, routing, and / or receiving time-sensitive, high-reliability, urgent, and / or other time-scheduled, time-reserved, time-allocated, and / or time-scheduled-reservation packets, cells, frames, and / or datagrams, such as real-time and high-priority messages over these networks. The invention(s) enables packet-, cell-, datagram- and / or frame-based networks to thereby efficiently, reliably, and in guaranteed real-time, to switch and / or route data such as voice, video, streaming, and other real-time, high-priority, high-reliability, and / or expedited data with guaranteed delivery and guaranteed quality of service. Networks may be fixed, point-to-point, mobile, ad-hoc, optical, electrical, and / or wireless.

A client-server architecture includes a plurality of clients and a plurality of servers. Information resources are replicated among the servers. According to one aspect, the invention includes an intermediary device called a "depot" sitting transparently between a client and a pool of servers which have the replicated information resources. The depot dynamically distributes multiple sessions contained in a client request among the servers. This architecture realizes a good granular scaleability of servers, and improved server throughput with a good response time. Multiple depots also realize robustness.

A novel networking architecture and technique for transmitting both cells and packets or frames across a common switch fabric, effected, at least in part, by utilizing a common set of algorithms for the forwarding engine (the ingress side) and a common set of algorithms for the QoS management (the egress part) that are provided for each I / O module to process packet / cell information without impacting the correct operation of ATM switching and without transforming packets into cells for transfer across the switch fabric.

A system is disclosed in which a data processing device is completely synchronized with a messaging service. One embodiment of the system comprises a wireless data processing device; a messaging service to maintain messages and other information on behalf of a user; and synchronization logic for maintaining synchronization of the messages and other information between the wireless device and the messaging service.

In one embodiment, a network system of the present invention includes at least a first router and a second router coupled to an upstream link to permit data flow from the first router to the second router across the upstream link. The second router includes a control plane and a data plane having an input port coupled to the upstream link and an output port connectable to a downstream link. The control plane includes a virtual pool having a capacity corresponding to a resource capacity of the first router and an admission control function. In response to a request to reserve resources for a flow through the data plane from the input port to the output port, the admission control function performs admission control for the upstream link by reference to resource availability within the virtual pool. In one embodiment, the request is a request to reserve resources for an Integrated Services flow, and the capacity of the virtual pool corresponds to a resource capacity of a Integrated Services service class supported by the first router.

The invention relates to enabling traffic engineering in frame-based networks such as Ethernet networks. There is described a method of and connection controller for establishing connections (76, 77) in a frame-based communications network comprising nodes (71-75 and 78) such as Ethernet switches. The connections are established by configuring, in various of the nodes, mappings for forwarding data frames, such as Ethernet frames. The mappings are from a combination of a) a destination address corresponding to a destination node (73) of the connection and b) an identifier, such as a VLAN tag. The mappings are to selected output ports of the various nodes. By using the combination of destination address AND identifier, the mappings enable data frames belonging to different connections (76, 77) to be forwarded differentially (ie forwarded on different output ports) at a node (75) despite the different connections having the same destination node. This enables flexibility in routing connections—ie the ability to perform traffic engineering.

A method of controlling packet traffic in an IP network of originating, receiving and intermediate nodes to meet performance objectives established by service level agreements. Traffic statistics and performance data such as delay and loss rates relating to traffic flows are collected at intermediate nodes. A control server processes the collected data to determines data flow rates for different priorities of traffic. A static directory node is used to look up inter-node connections and determine initial traffic classes corresponding to those connections. The rates are combined with the initial traffic classes to define codes for encoding the headers of packets to determine their network priority.

A method and apparatus provide reserved bandwidth and QOS / COS virtual circuit connections in a network using both conventional and novel reservation protocols and frame formats. An apparatus according to the invention includes an enterprise control point that communicates with switches via a reserved signaling channel. The switches have been upgraded or replaced to include enhanced functionality. The enhanced switches detect packets that include requests for reserved connections according to existing reservation protocols such as RSVP and IEEE 802.1P / Q. Such detected packets are forwarded to the enterprise control point for processing via a reserved signaling channel. The enterprise control point identifies a path within the network that can satisfy the requested QOS / COS and reserves the requested resources all along the path from beginning to end. A method according to the invention includes detecting packets that include requests for reserved connections according to existing reservation protocols such as RSVP and IEEE 802.1P / Q, forwarding detected packets to an enterprise control point for processing via a reserved signaling channel, identifying a path within the network that can satisfy the requested QOS / COS and reserving the requested resources all along the path from beginning to end.

A method, system, and apparatus are directed towards selectively concatenating data into a packet to modify a number of packets transmitted over a network based on a combination of network and / or send-queue metrics. In one embodiment, Nagle's algorithm is used for concatenating data into a packet. The concatenation may be selectively enabled based on heuristics applied to the combination of metrics. In one embodiment, the result may indicate that there should be a concatenation, or that data should be sent immediately, or that a current state for whether to concatenate or not should be maintained. The heuristics may include an expert system, decision tree, truth table, function, or the like. The heuristics may be provided by a user, or another computing device. In another embodiment, the concatenation may be enabled based on a conditional probability determined from the combination of metrics.

A method and apparatus for improving forwarding information base (FIB) lookup performance. An FIB is partitioned into a multiple portions that are distributed across segments of a multi-channel SRAM store to form a distributed FIB that is accessible to a network processor. Primary entries corresponding to a linked list of FIB entries are stored in a designated FIB portion. Secondary FIB entries are stored in other FIB portions (a portion of the secondary FIB entries may also be stored in the designated primary entry portion), enabling multiple FIB entries to be concurrently accessed via respective channels. A portion of the secondary FIB entries may also be stored in a secondary (e.g., DRAM) store. A depth level threshold is set to limit the number of accesses to a linked list of FIB entries by a network processor micro-engine thread, wherein an access depth that would exceed the threshold generates an exception that is handled by a separate execution thread to maintain line-rate throughput.

In the field of Quality-of-Service (QoS) management for adaptive real-time services running on mobile devices which support different access technologies in dynamic wireless Internet Protocol (IP) networks, the connectivity of the applied nodes is unpredictable time-varying. In this context, a QoS management unit (304) is proposed that allows adaptive applications with real-time requirements in typical mobile wireless scenarios—e.g. a radio link with a changing transmission quality and handover procedures (2900)—to adaptively and responsively react to a time-varying network topology and different radio link characteristics. Said QoS management unit (304) provides methods of pre-allocating, reserving, monitoring and adapting QoS-related parameters in a dynamic mobile environment.The QoS management unit (304) comprises at least one analysis unit (306) which evaluates QoS requests received from other nodes (402a / b, 404) to inform the application unit (328) of said mobile terminal (208) about the current QoS situation, at least one processing unit (312) that manages request messages (1200, 2000, 2400) for each type of QoS request, at least one monitoring unit (318) which monitors the current QoS situation within said mobile node (208) and initiates requests by activating the processing unit (312), and at least one generation unit (322) which is responsible for generating QoS requests or passing them on to the QoS management units (304) of other nodes (402a+b, 404).

A broadband communications access device. The broadband communications access devices includes a gateway interface, wired interface, wireless interface and security interface for proving secure wired and wireless broadband communications access.

This invention relates to the domain of Networks on Chips (NoC) and relates to a method of transferring data in a network on chip, particularly using an asynchronous “send / accept” type protocol.The invention also relates to a network on chip used to implement this method.

A storage management device records write requests that are directed to a data store. In one embodiment, the storage management device records a plurality of write request entries, each one of which includes information relating to a write request, in at least one first database table, and maintains, for each first database table, at least one record in a second database table. The one or more records in the second database table include data representing the effects of the write requests on a state of at least one portion of the data store. In one such embodiment, each time that one write request entry is recorded in one first database table, the storage management device updates at least one record in the second database table.

The text messaging system consists of mobile terminal (5) connected to mobile communication network (4), information terminal (3) connected to computer network (2), and server (1) connected to the mobile communication network and the computer network. The information terminal (3) has status detection means (22), (23), and (24), and detects an operational status including at least the connection status of the computer network and notifies the server (1) of it. The server (1) has status administration means (8) and (9) and decision means (10). The status administration means (8) and (9) retain the operational status of the information terminal (3) notified from status detection means (24) for each user. The decision means (10) determines a send mode according to the operational status of the information terminal such as whether to send a text message to an information terminal or to send a text message with a network application.

A system, method, and computer readable medium for preventing denial of service attacks in a cellular network, that comprises, counting a data packet generated by an address on the cellular network and blocking access to the cellular network of the address if the counted data packets exceeds a pre-defined threshold.

In an improved system for receiving digital voice signals from a data network, a jitter buffer manager monitors packet arrival times, determines a time varying transit delay variation parameter and adaptively controls jitter buffer size in response to the variation parameter. A speed control module responds to a control signal from the jitter buffer manager by modifying the rate of data consumption from the jitter buffer, to compensate for changes in buffer size, preferably in a manner which maintains audio output with acceptable, natural human speech characteristics. Preferably, the manager also calculates average packet delay and controls the speed control module to adaptively align the jitter buffer's center with the average packet delay time.

An access point is to handle received broadcast or multicast traffic as multiple instances of unicast traffic, where each instance is destined for a corresponding wireless client device associated with the access point. A client device may adjust its listen interval parameter according to predefined considerations, for example a charge level of a battery to power the client device and an expected usage model for the device. A client device may initiate a reassociation request to inform the access point of its adjusted listen interval parameter.

The invention relates to an architecture that facilitates load balancing among a plurality of hosts and preserve session affinity to a given host. An incoming stream of data packets that include packet sessions is input to one or more forwarding mechanisms for forwarding to one or more hosts. The forwarders generate a routing function that takes into consideration host availability, and distributes session packets according to the routing function. A session is distributed to the same host to preserve session affinity. When host availability changes, a new routing function is generated, such that any new session is routed according to the new routing function and existing sessions are routed according to the old routing function. When the old routing function becomes irrelevant, it is phased out. An optimization utilizes a maximally backward compatible hash function to minimize the differences between the old and new routing functions.

A method for providing a quality of service in a network environment is provided that includes receiving communication session information associated with a packet data protocol (PDP) link for an end user. The communication session information may be mapped to the end user in order to generate a quality of service attribute to be communicated to a next destination.

Embodiments of the present invention relate to a network of peer-to-peer communication devices controlled by a central controller. Using respective peer-to-peer communication devices, users can submit customized program schedules to the central controller, for media broadcasts that the users wish to record and view at a later time. The central controller maintains a global schedule of individual user-entered program schedules, and directs the peer-to-peer communication devices to record and re-play the content as requested in the schedules. The requested content may be recorded locally by any peer-to-peer communication device and transmitted upon request to a different peer-to-peer communication device of the network.

Apparatus for recording and collecting usage and other statistical data from components of a cable data network comprises a network manager for maintaining and collecting the statistics. Internet protocol addresses are associated with components of the network. The component maintains a software agent that manages a statistics database. Responsive to a manager request generated at a service provider defined time interval, the component software agent provides the usage statistics to the network manager in real-time during an Internet session with a host. When the host to Internet or other data connection is torn down due to failure, disconnect or inactivity time-out, remaining usage statistics data is collected and the session duration updated with the time of tear down. Usage statistics collected include the amount of data transferred to / from a host, the amount of data that is discarded due to insufficient resource capacity and amount of data that cannot be corrected despite forward error correction used in a downstream high capacity channel to the host. Data traps may be defined and downloaded to components of the network for implementation. As a result, billing of users of the cable data network can be usage sensitive and determined based on actual data transferred (including credit given for errored data) and / or time sensitive based on session duration.

A method for implementing communication between at least two client devices is provided. The first client device of the at least two client devices is disposed externally with respect to a firewall of an internal network. The method includes performing NAT (Network Address Translation) traversal between the first client device and a media server that is disposed internally with respect to the firewall of the internal network. The NAT traversal is configured to ascertain a NAT scheme employed for exchanging packets with the first client device. The method also includes establishing a communication path at least between the media server and the first client device, wherein logic for implementing the NAT traversal and logic for implementing the establishing the communication path are both implemented in the media server. The method further includes employing the media server to facilitate the communication.

A method and system for interworking between an Ethernet communication network and a frame relay network, in which a first network interface is operable to communicate with the Ethernet communication network using an Ethernet communication protocol. A second network interface is operable to communicate with the frame relay communication network using a frame relay protocol. A processing unit is in communication with the first network interface and the second network interface, in which the processing unit encapsulates frames received from the Ethernet network into frame relay frames, decapsulates frames received from the frame relay network to recover Ethernet frames and maps parameters corresponding to the received one of the frame relay and Ethernet frames into the other of the frame relay and Ethernet frames, the mapped parameters including connection configuration control plane information and data plane parameters corresponding to individual frames.

A method and system for communication between server-less computing devices or clients in computers communicating over networks, such as the World Wide Web (WWW) using stateless protocols, e.g., HTTP. In this scheme, there are two classes of clients which can operate independently or can be combined in computers communicating over the network: a) clients that issue commands and request status or data, and b) clients that function as service brokers for providing services and processing commands, updating status and providing specific data—resembleing a server device but without accessible TCP / IP ports. Each service providing device is authenticated, retains a unique identity and establishes a soft state with the globally accessible server or servers. All devices and clients can compile and process a globally common command language established between all communicating network clients. The central server includes a CGI processing program and a database to retain client specific information. The server database represents a collection of queues, each having a client unique identifiable status, pending commands and / or data components. In this scheme, commands and signaling transmitted between the servers and clients utilize standard HTTP protocol semantics and HTML or standard markup language syntax. Clients encapsulate or embed information as parameters passed to HTTP CGI as a set of standard HTTP conversations. A CGI processing program converts, parses or processes each conversation and passes arguments with or without data to queues.

A packet communication network is arranged so that a backpressure or feedback signal is sent from a receiving node to a node having packets to send to the receiving,node, selectively allowing only certain packets to be considered eligible for transmission. The backpressure is arranged to be lossless, and to avoid network deadlocks and livelocks. The transmission of a packet p from a sending node Xl to a receiving node Rl, via a link l, is controlled by (a) sending from the receiving node Rl to the upstream node Xl a feedback value fl that assures that there will be room in the buffer in the receiving node Rl to store packets subsequently received from the upstream node Xl; (b) assigning a priority level λp to packets stored in the buffer of the receiving node Rl; and (c) transmitting from the sending node Xl to the receiving node Rl, only those stored packets at Xl whose priority level λp exceeds the feedback value fl received from the receiving node Rl.

The invention discloses a multimode terminal and a data transmitting method thereof. The multimode terminal of the invention is provided with at least one mobile communication protocol stack, one wireless local area network protocol stack, a shared buffer area and a transmitting controller, wherein, the mobile communication protocol stack is used for storing IP data packet received from the internet to the shared buffer area and then informing the transmitting control layer; the transmitting control layer is used for informing the wireless local area network protocol stack storage address of the IP data packet in the shared buffer area; the wireless local area network protocol stack is used for taking the IP data packet out of the share buffer area and sending the IP data packet to a radio installation, and anyone of the mobile communication protocol stack, the transmitting control layer and the wireless local area network protocol stack modifies target IP address of the IP data packet to be the IP address of the radio installation in the wireless local area network connection. The multimode terminal and data transmitting method of the invention can effectively improve data transmission utilization.

The present inventions provide an integrated, modular array of administrative and support services for electronic commerce and electronic rights and transaction management. These administrative and support services supply a secure foundation for conducting financial management, rights management, certificate authority, rules clearing, usage clearing, secure directory services, and other transaction related capabilities functioning over a vast electronic network such as the Internet and / or over organization internal Intranets.These administrative and support services can be adapted to the specific needs of electronic commerce value chains. Electronic commerce participants can use these administrative and support services to support their interests, and can shape and reuse these services in response to competitive business realities.A Distributed Commerce Utility having a secure, programmable, distributed architecture provides administrative and support services. The Distributed Commerce Utility makes optimally efficient use of commerce administration resources, and can scale in a practical fashion to accommodate the demands of electronic commerce growth.The Distributed Commerce Utility may comprise a number of Commerce Utility Systems. These Commerce Utility Systems provide a web of infrastructure support available to, and reusable by, the entire electronic community and / or many or all of its participants.Different support functions can be collected together in hierarchical and / or in networked relationships to suit various business models and / or other objectives. Modular support functions can combined in different arrays to form different Commerce Utility Systems for different design implementations and purposes. These Commerce Utility Systems can be distributed across a large number of electronic appliances with varying degrees of distribution.