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437 results about "Ip layer" patented technology
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IP is technically only the network layer in the TCP/IP protocol suite, which routes packets from one network to another. However, the term often implies the entire suite, which is responsible for transmitting data from one computer to another (see TCP/IP ). IP very often refers not to the network as a whole but to the numeric address assigned...
Transparent TCP connection failover
ActiveUS20040268175A1Emergency protective arrangements for automatic disconnectionTransmissionFailoverSemi active
Methods of transparent connection failover allowing a remote computer (i.e., a client), to continue to use a network connection to communicate with one of at least two or more other computers (i.e., the backup servers) over a network, when one of the other computers (i.e., the primary server) fails. With the mechanisms of this invention, there is no need for the client to establish a new connection to a backup server when the primary server fails. The failover is preferably executed within a bridge layer between the TCP layer and the IP layer of the server's TCP / IP stack. No modifications are required to the network infrastructure, the client's TCP / IP stack, the client application or the server application. The methods support active or semi-active replication of the server application, and do not require rollback of the application during failover. The invention also provides mechanisms for bringing up new backup servers.
Owner:SALESFORCE COM INC
Method and system for processing network data packets
InactiveUS7403542B1Time-division multiplexData switching by path configurationFragment processingIP fragmentation
A system for transmitting and receiving TCP / IP data packets using a hardware engine is provided. The system includes an inbound MAC Receive state machine for processing MAC frames received from a network; an inbound IP verifier state machine for verifying IP packet headers; an inbound IP fragment processing state machine for processing and reassembling IP fragments; and an inbound TCP state machine for processing TCP segments received from an IP layer. The system also includes an outbound MAC Transmit state machine that sends MAC frames to a network; an outbound IP state machine that processes IP data to be passed to a MAC layer for transmission; and an outbound TCP state machine that processes TCP data to be passed to the IP layer for transmission.
Owner:MARVELL ASIA PTE LTD
Serving network selection and multihoming using IP access network
InactiveUS20050165953A1Simple methodAssess restrictionMultiple digital computer combinationsAccess networkClient-side
In some illustrative embodiments, an IP-layer based network selection and multihoming method is provided that enables a flexible and secure dynamic selection of one or more serving networks for use by a client node. The method is independent of any link-layer technology. A serving network can be an ISP network, a NAP network exchange facility, a VLAN, or the like. Network information is advertised to a client node, the client node is authenticated and authorized for use of an access router, and a secure tunnel is established between the client node and the access router. The method can be implemented by using standard protocols, and can work over any existing or future link-layer technologies that are able to carry IP datagrams, without any modification.
Owner:TELCORDIA TECHNOLOGIES INC +2
Method and apparatus for simple IP-layer bandwidth allocation using ingress control of egress bandwidth
InactiveUS6628609B2Reduce the possibilityMinimum bandwidthError preventionTransmission systemsDynamic bandwidth allocationData transmission
Owner:NORTEL NETWORKS LTD
Network block services for client access of network-attached data storage in an IP network
ActiveUS20040059822A1Multiple digital computer combinationsTransmissionService protocolOperational system
The SCSI and iSCSI layers over the TCP / IP layers of the protocol stack in an IP network client and in an IP network-attached storage server are replaced with a thin network block services layer. The network block services layer 71 implements a network block services protocol having a very reduced set of commands transmitted between the client and the storage server. The network block services protocol is used in a configuration process in which logical volumes of the network-attached storage are exported to the client and become local pseudo-disk instances. The client's operating system and application programs access the local pseudo-disk instances with what appears to be a standard device driver for a local disk device. The device driver maintains a TCP connection to each open device, and responds to connection failure by re-connecting with an alternative server IP port.
Owner:EMC IP HLDG CO LLC
Systems and methods for coordinating wireless traffic for heterogeneous wireless devices
InactiveUS20060215556A1Good effectError preventionFrequency-division multiplex detailsTraffic capacityPHY
In view of the foregoing, the present invention provides a unified software framework or architecture for distributed coordination of wireless devices and radios, referred to as Layer 2.5 Software MAC (or ‘SoftMAC’), which resides between the standard 802.11 MAC layer (Layer 2) and IP layer (Layer 3) to regulate and control the amount of traffic (both real-time and “best effort”) delivered to 802.11 MAC DCF interfaces. The software based design can be ported to different OS platforms and systems and is capable of handling new hardware interfaces and MAC mechanisms (e.g., 802.11e) with only a software upgrade. The invention thus provides a natural way to make end systems support coordination of different radios of device(s), achieving better performance. Advantages of the 2.5 layer software MAC in accordance with the invention include: (a) there are no hardware constraints; (b) heterogeneous wireless / radio support is provided at the 2.5 layer; and (c) an evolutionary and extensible solution with the ability to support future wireless MAC / PHY chip combinations.
Owner:MICROSOFT TECH LICENSING LLC
Method and system for transferring data in a communications network using redundant communication paths
ActiveUS20060256768A1Improve delivery reliabilityDecrease packet delivery timeData switching by path configurationMultiple digital computer combinationsReliable transmissionTransport layer
A communication node of the present invention automatically transmits original and duplicate packets over different paths in a communications network to improve delivery reliability of the packet and to decrease packet delivery time. A packet is typically marked for reliable transmission by the application layer of a source node, while a routing agent module within the node IP layer processes the marked packets. The marked packets are transmitted over redundant (e.g., primary and secondary) network paths from the source node to the destination node. The primary path is usually the shortest path between the source and destination nodes, while the secondary path is selected to avoid overlap with the primary path. The application or transport layer of the destination node filters or removes plural copies of received packets.
Owner:HARRIS GLOBAL COMMUNICATIONS INC
Method and apparatus for accessing remote storage using SCSI and an IP network
InactiveUS6895461B1Network usageTime-division multiplexData switching by path configurationSCSITTEthernet
A storage router and method for creating a first session to a first information-handling system on a first network supporting IP packets, the network having a plurality of information-handling systems, creating a second session to the first information-handling system on a second network supporting IP packets, supporting iSCSI operations in the first session through an internet protocol (IP) port coupled to the first network, supporting management operations in the second session through an internet protocol (IP) port coupled to the second network, wherein the first and second sessions use a common IP layer, and preventing iSCSI operations from using the second network.
Owner:CISCO TECH INC
NETWORK ARCHITECTURE FOR DYNAMICALLY SETTING END-TO-END QUALITY OF SERVICE (QoS) IN A BROADBAND WIRELESS COMMUNICATION SYSTEM
InactiveUS20080273520A1Efficient settingsNetwork traffic/resource managementTelephonic communicationQuality of servicePolicy decision
A communication network architecture including a broadband radio access network is provided. The architecture includes a terminal for transmitting an application layer service request message to request a service, a Policy Charging Rule Function (PCRF) for generating Quality of Service (QoS) parameters of an Internet Protocol (IP) layer using QoS parameters of an application layer contained in the application layer service request message, a first Policy Decision Function (PDF) for generating one or more QoS parameters of the IP layer in addition to the IP layer QoS parameters generated at the PCRF and a second PDF for generating a QoS parameter set of a radio access network using the IP layer QoS parameters generated at the PCRF and the one or more IP layer QoS parameters generated at the first PDF. The communication network guarantees an end-to-end QoS.
Owner:SAMSUNG ELECTRONICS CO LTD
System, Method and Apparatus for Providing Security in an IP-Based End User Device
InactiveUS20090094671A1Special data processing applicationsSecuring communicationDual modeSecurity parameter
The present invention provides a system, method and apparatus for providing security in an IP-based end user device, such personal computer clients, hard phones, soft phones, cellular phones, dual-mode phones, handheld communication devices, wireless communications devices and any other device capable of supporting real time IP-based applications. An application layer, a TCP / IP layer and a datalink layer of the IP-based end user device are monitored. Whenever an incoming session is detected and analyzed, the incoming session is accepted whenever one or more session security parameter(s) are satisfied and the incoming session is denied whenever the session security parameter(s) are not satisfied. Whenever an incoming packet is detected and analyzed, the incoming packet is processed whenever one or more packet security parameter(s) are satisfied and the incoming packet is dropped whenever the packet security parameter(s) are not satisfied.
Owner:AVAYA INC
Network block services for client access of network-attached data storage in an IP network
ActiveUS7475124B2Multiple digital computer combinationsTransmissionService protocolOperational system
The SCSI and iSCSI layers over the TCP / IP layers of the protocol stack in an IP network client and in an IP network-attached storage server are replaced with a thin network block services layer. The network block services layer 71 implements a network block services protocol having a very reduced set of commands transmitted between the client and the storage server. The network block services protocol is used in a configuration process in which logical volumes of the network-attached storage are exported to the client and become local pseudo-disk instances. The client's operating system and application programs access the local pseudo-disk instances with what appears to be a standard device driver for a local disk device. The device driver maintains a TCP connection to each open device, and responds to connection failure by re-connecting with an alternative server IP port.
Owner:EMC IP HLDG CO LLC
Method and apparatus for simple ip-layer bandwidth allocation using ingress control of egress bandwidth
InactiveUS20030103450A1Reduce the possibilityReduce riskError preventionTransmission systemsDynamic bandwidth allocationStructure of Management Information
The present invention relates to a switch for processing data units, such as IF data packets. The switch can be implemented as a router that includes a plurality of input ports, a plurality of output ports and a switch fabric capable of establishing logical pathways to interconnect a certain input port with a certain output port. A characterizing element of the router is its ability to control bandwidth usage on a basis of a logical pathway. This prevents congestion to occur in the switch fabric and also at the level of the output ports. For every active logical pathway the router sets-up a bandwidth control mechanism including at least one queue to hold data units received at an input port. The bandwidth control mechanism performs an accounting operation to determine the average bandwidth usage and if less than a threshold requests for releasing data units in the switch fabric are sent to the switch fabric controller. When the threshold is exceeded the bandwidth control mechanism stops sending requests for service to the switch fabric controller. The system also supports priorities. Instead of stopping the issuance of signals requesting release of data packets the priority level of the queue (reflected in a priority field in the signal requesting release of a data packet) changes from HI to LO. The switch fabric controller is designed to recognize priority requests and will accept LO priority requests only when there are no other HI priority requests pending. The present invention also provides a data transport device which includes a plurality of nodes interconnected by a physical link that establishes two ring-shaped paths on which data is transported on opposite directions. Each node is capable of sending a control message to the upstream node to advise the upstream node of the data carrying requirements of the node at which the message has originated. The upstream node can then throttle the introduction of data in the paths to preserve capacity that can be used by the downstream nodes.
Owner:NORTEL NETWORKS LTD
System and method for providing an adaptive streaming flow control mechanism between the TCP and IP layers of the TCP/IP suite of protocols
InactiveUS6880017B1Easy to adaptReduce suddennessMultiple digital computer combinationsProgram controlComputer networkBurstiness
In a data communication network operated under the TCP / IP suite of protocols the invention adds an adaptive streaming (AS) layer, inserted between the IP and the TCP protocol layers, in which the received data packets of each open TCP connection are temporarily queued and from where they are first reordered then, delivered to the TCP layer at a pace matching the optimal receiving rate of TCP connections. Thus, the invention adds a rate-based transmission mechanism to the TCP layer for the received data packets so as to better adapt to higher-speed communication lines and to reduce drastically the burstiness of the TCP flow control.
Owner:IBM CORP
IP platform for advanced multipoint access systems
InactiveUS7266087B2Minimum amount of memory spaceError preventionFrequency-division multiplex detailsNetwork terminationTraffic capacity
In LMDS systems the downlink bandwidth is continuously varying in time because each downlink burst uses a network termination individual modulation and coding (Physical layer) scheme, the higher layer (IP) functions cannot perform service priority respecting traffic shaping. The invention proposes mainly to combine both framing and IP layer functions within one inter-layer framer. The combination of both information ensures QoS provisioning in case of multi-modulation and multi-coding environment. The QoS queue server gets always informed on the actual amount of available data frame bits from the downlink framer and therefore, the QoS queue server is able to decide on the next IP packet or packet fraction to transport. This decision is always based on service priority aspects. As soon as the downlink frame is filled—supposing that the maximum downlink frame rate is always lower than the internal processing in the inter-layer framer—the QoS server stops the data delivery.
Owner:WSOU INVESTMENTS LLC
Transparent TCP connection failover
Methods of transparent connection failover allowing a remote computer (i.e., a client), to continue to use a network connection to communicate with one of at least two or more other computers (i.e., the backup servers) over a network, when one of the other computers (i.e., the primary server) fails. With the mechanisms of this invention, there is no need for the client to establish a new connection to a backup server when the primary server fails. The failover is preferably executed within a bridge layer between the TCP layer and the IP layer of the server's TCP / IP stack. No modifications are required to the network infrastructure, the client's TCP / IP stack, the client application or the server application. The methods support active or semi-active replication of the server application, and do not require rollback of the application during failover. The invention also provides mechanisms for bringing up new backup servers.
Owner:SALESFORCE COM INC
Systems and Methods of Using an IP ID Field for Automatic WAN/LAN Detection
The solution of the present invention provides systems and methods for encoding information into an Internet Protocol identification field (IPID) of an IP layer header of a network packet in a manner acceptable to many or all of the network devices that encounter the encoded packet. In one embodiment, the solution described herein encodes the IP identification field of the IPID header with information to be communicated between devices. Appliances may use the encoded IP field as a signal or a means for a low-bandwidth subcarrier of data between the appliances that is transparent to any intervening network equipment. For example, the encoded field may be used to announce or probe the presence of a device, a functionality or capability of device or to indicate a type or speed of a network connection of a port on a device.
Owner:CITRIX SYST INC
Packet communications system and method
InactiveUS7012922B1Improve efficiencyImprove bandwidth efficiencyTime-division multiplexNetwork connectionsDigital subscriber lineTraffic capacity
A digital subscriber line (DSL) arrangement provides data and voice over IP (VoIP) services over a subscriber loop. Instead of conventional multiplexing at the IP layer, two separate IP packet streams are provided, one stream carrying delay insensitive data traffic and the other transporting delay sensitive traffic, in particular, packetised voice. The system segments each IP stream (i.e. those carrying voice and data) separately to produce two ATM streams which are then multiplexed using an ATM multiplexer. This reduces the delays to voice traffic resulting from queuing behind long data packets.
Owner:RPX CLEARINGHOUSE
Interface internet protocol fragmentation of large broadcast packets in an environment with an unaccommodating maximum transfer unit
In a multinode data processing system in which the nodes communicate with one another through communication adapters coupled to a switch or network, a method is provided for using the Internet Protocol (IP) for transmitting large broadcast data packets without incurring the overhead normally associated with packet fragmentation. By adding an Internet Protocol (IP) header as the first header in every packet fragment in the fragmentation process, fragmented packets are able to be assembled in the IP layer without intervention at the adapter interface layer.
Owner:IBM CORP
Ethernet emulation using a shared mailbox between two processors in a feature phone
A feature phone has a base-band processor and an applications processor that communicate with each other by emulating an internal Ethernet within the phone. TCP / IP stacks in each processor receive data from high-level applications for transmission to the other processor. Ethernet-emulating drivers are called by the IP layers. An Ethernet-emulating transmit driver writes IP-packet data to a shared memory and sends an interrupt to the other processor, which activates a receive routine that reads the IP packet data from the shared memory and sends it up through the TCP / IP stack. There is no twisted-pair cable or other media since the shared memory acts as the transfer media. A shared mailbox holds the packet length and sends an interrupt to one processor when written, while a general-purpose input-output GPIO module sends an interrupt to the other processor. The internal emulated-Ethernet is entirely within the phone and separate from cellular networks.
Owner:INTELLECTUAL VENTURES I LLC
Method and system for correlating IP layer traffic and wirless layer elements in a UMTS/GSM network
InactiveUS20090088147A1Wireless network protocolsRadio/inductive link selection arrangementsGSMDistributed computing
The present invention relates to a correlation module for correlating IP layer traffic and wireless layer network elements in a network. According to an example embodiment, the correlation module includes an RNC analyzer, a Gn snoop unit, and / or a mapping unit. The RNC analyzer is configured to collect wireless layer network element information from at least one RNC. The Gn snoop unit is configured to collect wireless layer network element information and IP layer traffic information from at least one Gn interface between a serving GPRS support node and a gateway GPRS support node. The mapping unit is configured to map the IP layer traffic and the wireless layer network elements in the network based on the collected IP layer traffic information and the collected wireless layer network element information. A method of correlating IP layer traffic and wireless layer network elements in a network is also disclosed.
Owner:RPX CORP
Error informing apparatus and error informing method
InactiveUS6847994B1Short timeMultiple digital computer combinationsData switching networksComputer hardwareIp layer
An error detecting section detects an error caused in a mail transmitting section. The error detecting section instructs an error message data generating section to generate an error message data when detecting the error. The error message data includes a character string generated to correspond to the error, and a code. The error message data generating section transmits generated error message data to an ICMP processing section. The ICMP processing section has a function of notifying a communication partner of information using a packet in accordance with a protocol for management, which reports information of a protocol state of IP layer, that is ICMP (Internet Control Message Protocol). The ICMP processing section puts error message data into a Data frame of the packet, and transmits this packet to a predetermined destination via LAN.
Owner:MATSUSHITA GRAPHIC COMM SYST INC
Movement detection method and a mobile terminal
InactiveUS20050083885A1Shorten handover timeShorten the timeTime-division multiplexData switching by path configurationHandoverIp layer
In accordance with a movement detection method, a mobile terminal in moving among access router devices all set at the same frequency, stores the link layer address of the currently reachable access router device. When receiving a Layer 2 frame from a new access router device, the mobile terminal issues a trigger for requesting to implement a part of IP handover processing. By so doing, it allows IP handover processing to be initiated at higher speed than in the case of the conventional IP layer, thus enabling to reduce the total time of handover processing.
Owner:PANASONIC CORP
Load balancing system based on content
InactiveCN101605092ASolve the problem of inconsistencySave resourcesData switching networksData synchronizationThe Internet
The invention relates to a load balancing system based on content, comprising load balancing based on content, inspection of content and health status of a backend server, self high availability of load balancing and load balancing algorithm thereof, wherein, the load balancing based on content refers to that a system works in the seventh layer of a seven-layer model of an OSI Internet, and belongs to the load balancing of an application layer; the inspection of content and health status of a backend server is provided with an inspection module of system resources to inspect the content and the health status of the backend server in real time; in order to avoid single-point failures of the load balancing system, the load balancing system uses dual-system configuration to realize the high availability; a main system and a standby system keep the consistency of connection information at client by data synchronization. When a system is in the failure status, a standby load balancing system automatically takes over services. The system of the invention changes the goofy load balancing mode of the traditional IP layer load balancing, and thus, the load hit rate can be effectively increased. The load balancing system does not require that the backend server stores the same content, which largely saves server resources.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD
Systems and methods of using an IP ID field for automatic WAN/LAN detection
The solution of the present invention provides systems and methods for encoding information into an Internet Protocol identification field (IPID) of an IP layer header of a network packet in a manner acceptable to many or all of the network devices that encounter the encoded packet. In one embodiment, the solution described herein encodes the IP identification field of the IPID header with information to be communicated between devices. Appliances may use the encoded IP field as a signal or a means for a low-bandwidth subcarrier of data between the appliances that is transparent to any intervening network equipment. For example, the encoded field may be used to announce or probe the presence of a device, a functionality or capability of device or to indicate a type or speed of a network connection of a port on a device.
Owner:CITRIX SYST INC
SDN (Software Defined Network)-based heterogeneous network convergence framework
InactiveCN104023335AEasy to manageEasy to apply innovationNetwork topologiesSecurity arrangementEngineeringHeterogeneous network
The invention provides a SDN (Software Defined Network)-based heterogeneous network convergence framework. According to the framework, the core idea of control and data separation in the software defined network is referred, a controller is added in an EPC core network, user identity information is packaged to be a unique user identifier to serve as the identity certificate during the network access and switching process. The concept of the user identifier is used, a method of realizing virtual switching under the control of the controller is brought forward, the switching access process can be theoretically simplified, and network access time delay can then be reduced. After switching, the IP remains unchanged, the time spent on IP layer switching in the case of heterogeneous network switching is saved, the target of reducing the entire switching time delay is achieved, IP address management and user safety management in a mobile environment are facilitated as the IP is maintained, and a feasible solution is provided for solving the problem of seamless switching between the LTE network and the WLAN network.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Joint-layer restoration in packet-over-optical networks
A joint “packet-optical” layer restoration mechanism protects against single, packet-layer router failures by managing network resources from both the packet layer and the optical transport layer in a synergistic manner. It reuses packet-layer router service-ports and / or transport-layer service wavelengths associated with optical switch-ports instead of reserving additional standby packet-layer router service-ports. It can reuse resources from primary paths that are unaffected by router failures and paths that exist for link-failure protection at the optical layer. Embodiments feature a modified node structure that includes both an IP router and a dynamically reconfigurable OXC, which dynamically establishes connectivity between IP-router ports and transport-layer optical fibers. The joint-layer router provides fine-granularity grooming at the IP layer and full-fledged wavelength networking via dynamic wavelength switching and / or wavelength translation at the optical layer. The latter can change the wavelength cross-connections on-demand to perform restoration or to modify the connectivity between IP routers in the network.
Owner:LUCENT TECH INC
Stream table entry generating method and device
ActiveCN103812778AReduce time complexityImprove computing efficiencyHybrid transportTime complexityData transmission
The invention discloses a stream table entry generating method and device. The method comprises the following steps: receiving a service path establishing request, wherein the service path establishing request comprises a constraint condition, source equipment and target equipment; finding a service path which satisfies the constraint condition and ranges from the source equipment to the target equipment in a data transmission network according to a cross-layer information model, wherein the cross-layer information model is a model describing an integral topological relation between an IP (Internet Protocol) layer and a light layer on the same level; generating a respective stream table entry corresponding to each piece of forwarding equipment respectively on the service path, and transmitting the stream table entries to corresponding forwarding equipment respectively. According to the scheme, resources of the IP layer and resources of the light layer are considered during calculation of the service path according to the cross-layer information model in which the resources of the IP layer and the resources of the light layer are on the same level, thereby greatly lowering the time complexity of business path calculation, increasing the service path calculation efficiency, and increasing the generation efficiency of the stream table entries.
Owner:HUAWEI TECH CO LTD
Increasing link capacity via traffic distribution over multiple wi-fi access points
InactiveUS20080165693A1Maximize capacityError preventionTransmission systemsQuality of serviceTraffic capacity
A method and system for combining the bandwidth available to a user communications device from multiple access points by switching output requests and corresponding replies to such requests among a plurality of such access points. In the simplest implementation the switching can be on a round-robin basis, but the switching can be enhanced to prioritize and use quality of service requirements associated with each output request, and also to measure congestion at each access point and base switching upon the congestion level. The invention operates by generating subset ISO communication stacks for each available access point, preferably the subset from the IP layer to the data control link, and switching between these stacks.
Owner:INT BUSINESS MASCH CORP
Flow filtering fine wall
This invention relates to computer network anti-fire wall with the following basic control method realizing the protection to the application layer in the state of filtration of the state packet a transparent applied information filtration system is realized based on the filtration of the state detection packet by TCP protocol stack two ends can be accessed directly when it works at the link layer or IP layer permitted by rule, and data flows from one session stream to another stream in the way of stream. Since the application layer strategy of the anti-fire wall is at the middle of the stream, its standard design has the ability of complete identity discrimination, access control and audit, at the same time, the system provides managing and monitor tools of rich GOI mode to do the operation of safety strategy configuration user management, real-time monitor, audit inquiry, flow management.
Owner:NEUSOFT CORP
Router monitoring
InactiveUS6931452B1Digital computer detailsMultiprogramming arrangementsIp layerData transmission systems
A data transmission system for exchanging packetized data between any IP host selected from a cluster of IP hosts, each host having at least an IP layer, a network layer, and a plurality of workstations coupled by an intermediary of an IP network. The IP hosts are coupled to the IP network via a layer 2 network such as a LAN interfacing the IP network by a set of routers and a network dispatcher that receives all incoming data flow and dispatches the data to the cluster of hosts. The data transmission system comprises at least a monitoring device included in the cluster of hosts where the monitoring device is operable to monitor the availability of candidate routers selected from the set of possible routers. The monitoring device also is operable for broadcasting router availability information to each host in the cluster of hosts via the network dispatcher.
Owner:IBM CORP
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