49th week of 2009 patent applcation highlights part 36 |
Patent application number | Title | Published |
20090296671 | COMMUNICATIONS BETWEEN A CLIENT DEVICE AND AN INFRASTRUTURE DEVICE - Techniques are provided for communicating information between a wireless client device (CD) and an infrastructure device (ID) in a WLAN in which the CD wirelessly communicates with the ID in IBSS mode over a pseudo-BSS/IBSS air interface. The CD includes a WLAN NIC that operates in IBSS mode and a client host system that includes a client custom driver module (CCDM) and a WLAN NIC driver module configured to operate in IBSS mode. The ID includes a hardware interface and a host system which includes a packet separation driver module (PSDM) and an infrastructure custom driver module (ICDM). The CD operates in pseudo-BSS/IBSS mode (PBIM). The CCDM provides pseudo BSS-like service(s) with respect to packets generated by upper protocol layer modules to generate pseudo-BSS-like packets that it provides to the WLAN NIC via WLAN NIC driver module. Based on the pseudo-BSS-like packets, the WLAN NIC generates PBIM packets and transmits them. The PSDM receives packets from the hardware interface and separates them. When the PSDM receives PBIM packets, the PDSM sends the PBIM packets to the ICDM which performs one or more BSS-like services with respect to the PBIM packets. | 2009-12-03 |
20090296672 | METHODS FOR WIRELESSLY COMMUNICATING INFORMATION BETWEEN A CLIENT DEVICE AND AN INFRASTRUCTURE DEVICE - Techniques are provided for communicating information between a wireless client device (CD) and an infrastructure device (ID) in a WLAN in which the CD wirelessly communicates with the ID in IBSS mode over a pseudo-BSS/IBSS air interface. The CD includes a WLAN NIC that operates in IBSS mode and a client host system that includes a client custom driver module (CCDM) and a WLAN NIC driver module configured to operate in IBSS mode. The ID includes a hardware interface and a host system which includes a packet separation driver module (PSDM) and an infrastructure custom driver module (ICDM). The CD operates in pseudo-BSS/IBSS mode (PBIM). The CCDM provides pseudo BSS-like service(s) with respect to packets generated by upper protocol layer modules to generate pseudo-BSS-like packets that it provides to the WLAN NIC via WLAN NIC driver module. Based on the pseudo-BSS-like packets, the WLAN NIC generates PBIM packets and transmits them. The PSDM receives packets from the hardware interface and separates them. When the PSDM receives PBIM packets, the PDSM sends the PBIM packets to the ICDM which performs one or more BSS-like services with respect to the PBIM packets. | 2009-12-03 |
20090296673 | APPARATUS FOR IMPLEMENTING A PSEUDO-BASIC SERVICE SET (BSS)-LIKE NETWORK OVER AN INDEPENDENT BASIC SERVICE SET (IBSS) MODE AIR INTERFACE - Techniques are provided for communicating information between a wireless client device (CD) and an infrastructure device (ID) in a WLAN in which the CD wirelessly communicates with the ID in IBSS mode over a pseudo-BSS/IBSS air interface. The CD includes a WLAN NIC that operates in IBSS mode and a client host system that includes a client custom driver module (CCDM) and a WLAN NIC driver module configured to operate in IBSS mode. The ID includes a hardware interface and a host system which includes a packet separation driver module (PSDM) and an infrastructure custom driver module (ICDM). The CD operates in pseudo-BSS/IBSS mode (PBIM). The CCDM provides pseudo BSS-like service(s) with respect to packets generated by upper protocol layer modules to generate pseudo-BSS-like packets that it provides to the WLAN NIC via WLAN NIC driver module. Based on the pseudo-BSS-like packets, the WLAN NIC generates PBIM packets and transmits them. The PSDM receives packets from the hardware interface and separates them. When the PSDM receives PBIM packets, the PDSM sends the PBIM packets to the ICDM which performs one or more BSS-like services with respect to the PBIM packets. | 2009-12-03 |
20090296674 | METHOD AND APPARATUS FOR DENSITY DETERMINATIOIN IN A WIRELESS COMMUNICATION NETWORK - Each node in a wireless communication network adds information in hello messages wherein the information comprises the number of hello messages received at the node from a plurality of nodes. Also, the nodes are configured to determine the node density based on additional information extracted from the received hello messages. For example, a first node in the wireless communication network receives a hello message from a second node, wherein the hello message comprises additional information indicating at least a number of hello messages received by the second node from a plurality of nodes in the wireless communication network. The first node extracts the additional information from the received hello message and based on the extracted additional information, the first node determines at least one channel performance metric. Based on the at least one channel performance metric the first node determines density of neighboring nodes in the wireless communication network. | 2009-12-03 |
20090296675 | SYSTEMS AND METHODS FOR MANAGING RRC CONNECTIONS IN WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate selective release of mobile devices using conflicting identifiers when communicating with an access point. The access point can detect the conflicting identifier and transmit a selective release message to the mobile devices. The selective release message can include a disambiguation identifier so the appropriate mobile device can identify that it is incorrectly connected to the access point and can release its connection. The disambiguation identifier can be one or more unique aspects of the correctly or incorrectly connected mobile device, such as an identifier, previous message related aspects, whether a security or context check can be decoded, etc. Thus, connection of the incorrectly connected mobile device can be released without additionally releasing the correctly connected mobile device. | 2009-12-03 |
20090296676 | Seamless Wireless Mobility - Seamless wireless mobility is described. In one embodiment, a mobility manager can query a subscriber catalog for a current registration status of handset. The mobility manager can then use the registration status to send a first signal to the handset over either a wireless network or an Internet protocol-based network. | 2009-12-03 |
20090296677 | WIRELESS PERSONAL LOCAL AREA NETWORK - A transceiver apparatus for creating a wireless personal local area network between a computer terminal and one or more peripheral devices. A separate transceiver is connected to the computer terminal and to each peripheral device. The transceivers can be connected to the terminal or peripheral device either internally or externally. A low power radio is used to communicate information between the computer terminal and peripheral devices. Different transceivers can be used for modifying the carrier frequency and power of the local area network. The microprocessor is located inside each transceiver and controls the information flow of the transceiver including the communication protocol which allows each device to know if other devices are communicating, which devices are being communicated to, and selectively address the peripheral devices. An Idle Sense communication protocol is used for information transfer between the computer terminal and the peripheral devices, increasing efficiency in power management and compensating for transmission collisions. | 2009-12-03 |
20090296678 | SYSTEM AND METHOD FOR GENERIC DATA MAPPING BETWEEN WIRELESS COMPONENT APPLICATIONS AND APPLICATION DATA SOURCES - An application gateway is configured to facilitate message communication between an application executing on a wireless device and a backend server. The application gateway comprises a message interface, a backend connector and a transformer. The message interface facilitates communication between the wireless device and the application gateway in a compact format. The backend connector facilitates communication between the application gateway and the backend server using a schema-based internal format. The transformer translates data between the compact format and the internal format. The transformer further includes a transformer mapping document for correlating elements in the compact format with elements in the internal format. | 2009-12-03 |
20090296679 | SYMBOL-LEVEL ADAPTATION METHOD, MEMORY, EQUALIZER AND RECEIVER FOR IMPLEMENTING THIS METHOD - A symbol-level adaptation method to adapt at least one coefficient of an equalizer, wherein the method includes a) determining if there exists a shortened pilot channelization code which has a spreading factor shorter than the spreading factor of a full pilot channelization code and which is, at the same time, still orthogonal to any other simultaneously active channelization codes, and, b) if there exists a shortened pilot channelization code, despreading the pilot channel using the shortened pilot channelization code to obtain a pilot symbol estimation, and c) adapting the value of the equalizer coefficient according to the error between the pilot symbol estimation obtained from step b) and a corresponding expected pilot symbol. | 2009-12-03 |
20090296680 | Wireless Communication Method in Traffic System, Wireless Base Station, and Wireless Terminal - An on-vehicle device sends an allocation request for a wireless resource to a roadside device. The roadside device, in response to receiving this allocation request, allocates a roadside-vehicle resource that is a wireless resource for roadside-vehicle communication with the on-vehicle device, and an inter-vehicle resource that is a wireless resource for inter-vehicle communication between on-vehicle devices; and sends the allocation information to the on-vehicle device. The on-vehicle device carries out roadside-vehicle communication with the roadside device using the roadside-vehicle resource identified with the allocation information received from the roadside device, and carries out inter-vehicle communication with other on-vehicle devices using the inter-vehicle resource identified with the allocation information. Thereby, roadside-vehicle communication and inter-vehicle communication can be achieved with higher utilization of wireless resources while avoiding the hidden terminal problem. | 2009-12-03 |
20090296681 | Use of out-of-band signaling for wireless communication network to enhance search and entry - A method, apparatus and computer program operate so as to formulate a request at a terminal for a network access node to transmit a broadcast message; to transmit the request on an out-of-band radio channel for reception by the network access node; and to receive the broadcast message prior to a next scheduled time for the broadcast message to be transmitted. The network may be a WiMAX network, and the broadcast message may be at least one of a downlink channel descriptor/uplink channel descriptor and system identity information advertisement message. Also disclosed is a corresponding network access node that operates so as to receive a request from at least one terminal, where the request is a request to transmit a broadcast message and is received on an out-of-band radio channel. The network access node responds by transmitting the broadcast message prior to a next scheduled time for the broadcast message to be transmitted. | 2009-12-03 |
20090296682 | WIRELESS COMMUNICATION SYSTEM, WIRELESS TERMINAL, MANAGEMENT APPARATUS, AND SESSION CONTROL METHOD - A first base station apparatus time division multiplexes an upstream channel and a downstream channel at a first ratio into a first frequency, and uses the upstream channel and the downstream channel in a predetermined coverage to relay a communication of a wireless terminal. In a coverage overlapping the coverage of the first base station apparatus, a second base station apparatus time division multiplexes an upstream channel and a downstream channel at a second ratio which is different from the first ratio, into a second frequency which is different from the first frequency, and uses the upstream channel and the downstream channel to relay a communication of the wireless terminal. | 2009-12-03 |
20090296683 | Transmitting a protocol data unit using descriptors - A method for transmitting a protocol data unit (PDU) includes receiving one or more Ethernet packets and reading a header associated with each of the one or more Ethernet packets. The method further includes generating a transmit descriptor that includes a plurality of fields containing information for preparing a protocol data unit (PDU), and preparing a PDU according to the transmit descriptor. The method also includes transmitting a burst, wherein the burst includes one or more PDUs. | 2009-12-03 |
20090296684 | Packet synchronizing for communications over a wireless communication system - Synchronization methods and systems for communications over a multi-band system are presented. A synchronization technique for communications over a multi-band system includes receiving a packet of preamble symbols respectively transmitted over a sequence of frequency sub-bands according to one of a plurality of frequency hopping patterns, wherein the plurality of frequency hopping patterns are partitioned into a plurality of disjoint groups, each group having a different associated periodicity; computing, in parallel, respective autocorrelation values of the packet received in a selected frequency sub-band at a plurality of symbol delays; and selecting one of the plurality of groups of frequency hopping patterns based on the autocorrelation values at the plurality of symbol delays. | 2009-12-03 |
20090296685 | User-Mode Prototypes in Kernel-Mode Protocol Stacks - Methods of enabling user-mode prototypes in kernel-mode protocol stacks are described. A protocol stack comprises a set of kernel-mode modules. The protocol stack defines a data path for packets. At least one interception point is defined in a kernel-mode module at which a packet can be intercepted and/or inserted. In an embodiment, each packet intercepted at the interception point, or a copy of said packet, is sent to a user-mode module. The user-mode module processes the packet in some way and then returns the packet to the same, or a different, interception point in the data path. In this way, a user-mode module (which is easier to program) can be used to prototype functionality of a kernel-mode module without requiring kernel-mode code to be written. | 2009-12-03 |
20090296686 | METHODS, COMMUNICATIONS DEVICES, AND COMPUTER PROGRAM PRODUCTS FOR SELECTING AN ADVERTISEMENT TO INITIATE DEVICE-TO-DEVICE COMMUNICATIONS - Methods, communications devices, and computer program products for selecting an advertisement to initiate communications between communication devices using an Internet protocol enabled television infrastructure are provided. Input of a call back number is received. Advertisement data of an enterprise is accessed via an Internet protocol enabled device. A selection is received to initiate a communication to the enterprise. A selection of the call back number is received. The call back number is contacted, in response to an indication that the enterprise has been contacted for initiation of the communication. | 2009-12-03 |
20090296687 | BYPASSING ROUTING RULES DURING A CONVERSATION - Communication requests added to a conversation are routed directly to a user without following the pre-configured routing rules for the user during a breakthrough period. The breakthrough period may last for the duration of the conversation or for some other period of time. A conversation may be initiated using any supported type of communication. For example, if a user initially sets up an IM conversation with a remote user, then when a voice call is made to the user from the remote user, the voice call is routed directly to the user without applying the routing rules that are configured for the user. Once the breakthrough period has elapsed, the routing rules become active again and are applied to communications received from the remote user that are directed to the user. | 2009-12-03 |
20090296688 | Coding and Behavior when Receiving an IMS Emergency Session Indicator from Authorized Source - A method is provided for a user equipment (UE) to respond to an emergency-related message sent to the UE. The method comprises the UE receiving a first message containing an indicator indicating that an emergency-related request has been made, the UE recognizing the indicator as an indication that the emergency-related request is related to an emergency, and the UE sending a second message containing emergency-related information about itself. | 2009-12-03 |
20090296689 | Privacy-Related Requests for an IMS Emergency Session - A network component is provided that includes a processor configured, upon the network component receiving an IMS (Internet Protocol Multimedia Subsystem) emergency call from a user equipment (UE), to detect in the emergency call an indicator requesting the network component to restrict presentation of private information related to the UE. The processor is further configured, when the indicator is present, to transmit the emergency call without at least some of the private information to a Public Safety Answering Point (PSAP). | 2009-12-03 |
20090296690 | Method And Management Of Public Identities In An Information Transmission Network, Server For Managing Public Identity Records, Equipment For Managing A Group Public Identity And Corresponding Computer Programs - This method of managing public identities in an information transmission network ( | 2009-12-03 |
20090296691 | METHOD FOR MAKING TELEPHONE APPARATUS OPERATIVE WITH MULTIPLE NETWORKS - An apparatus having a telephonic communication capability with multiple networks enables users to make telephone calls in a simplified manner. According to an exemplary embodiment, the apparatus includes a memory for storing a first telephone number including an area code, and a processor for receiving a signal to dial the stored first telephone number and for determining whether the first network or the second network is selected. If the first network is selected, the processor causes the stored first telephone number to be dialed. If the second network is selected, the processor enables a user to select between the stored first telephone number and a second telephone number derived from the stored first telephone number by deleting at least the area code. The processor also causes a selected one of the stored first telephone number and the second telephone number to be dialed. | 2009-12-03 |
20090296692 | End-to-end Internet connections establishment - Methods and apparatus, including computer program products, for signaling in a network. A method of signaling in a network includes determining in a first end station a destination telephone network address of a second end station and determining in the first end station an intermediate Internet address corresponding to the destination telephone network address. In response to determining the intermediate Internet address, the method retrieves an Internet address of the second end station from an address list at the intermediate Internet address and establishes an end-to-end Internet connection between the first end station and the second end station with the Internet address of the second end station. | 2009-12-03 |
20090296693 | Session Initiation Protocol Telephone System, Data Transmission Method, Server Unit, and Telephone Terminal - According to an aspect of the present invention, there is provided a Session Initiation Protocol (SIP) telephone system comprises a server unit, telephone terminals and a module. The server is connected to Internet Protocol (IP) network. The telephone terminals transmit and receive SIP messages to and from the server unit via the IP network. The module applies SIP messages regarding event notification to data transmission to form interactive communication paths among the server unit and each of the telephone terminals. | 2009-12-03 |
20090296694 | METHODS, SYSTEMS, AND COMPUTER READABLE MEDIA FOR PROVIDING NEXT GENERATION NETWORK (NGN)-BASED END USER SERVICES TO LEGACY SUBSCRIBERS IN A COMMUNICATIONS NETWORK - The subject matter described herein includes methods, systems, and computer readable media for providing NGN-based end user services to legacy subscribers in a communications network. According to one aspect, the subject matter described herein includes a method for providing NGN-based end user services to legacy subscribers in a communications network that includes, at a service creation system (SCS) node having at least one processor, using the at least one processor for receiving a SS7 call setup message associated with a call involving a legacy subscriber access device and holding the SS7 call setup message. The method also includes, while holding the SS7 call setup message, generating a SIP call setup message related to the SS7 call setup message, and initiating the providing of at least one NGN-based end user service for the call using the SIP call setup message. The method further includes determining whether to modify the SS7 call setup message based on the at least one NGN-based end user service, and, in response to determining to modify the SS7 call setup message, modifying the SS7 call setup message, and routing the SS7 call setup message towards a destination. | 2009-12-03 |
20090296695 | HYBRID TYPE TELEPHONY SYSTEM - A hybrid type telephony system capable of establishing a connection between conventional type telephone sets contained in an exchange unit and LAN type telephone sets contained in an IP network, the system comprising: a gateway circuit connected between the exchange unit and the IP network and performing voice data format conversion, and a central control unit connected to the LAN of the IP network for establishing a communication path to the exchange unit via a control bus, controlling switching of IP packets of the IP network, managing IP address information of the LAN type telephone sets and the gateway circuit via the LAN, and controlling connection between the LAN type telephone sets and connection between the LAN type telephone sets and the gateway circuit. | 2009-12-03 |
20090296696 | VOICE OVER INTERNET PROTOCOL MULTI-ROUTING WITH PACKET INTERLEAVING - A method and system for processing data packets is described within. The method executed by the system includes the steps of receiving a first data packet, determining if the first data packet is a first expected data packet, determining if the first data packet is a next expected date packet, storing the first data patent if the first data packet is the next expected data packet and waiting a period of time for a second data packet. | 2009-12-03 |
20090296697 | Method for verifying shared state synchronization of redundant modules in a high availability network switch - Embodiments of the invention disclose a method of determining the existence of state synchronization between two redundant processing modules operating in a network switch that operates in a manner wherein ordinary network traffic stimuli are autonomously processed through interface and fabric modules, and extraordinary network stimuli are processed from the interface modules to the redundant processing modules, wherein one of the modules is operating actively in the switch and the other is operating in a standby condition whereby state latency exists between the two modules, comprising stopping processing of the extraordinary stimuli to the actively operating processing module, completing processing of stimuli previously received by the actively operating processing module, completing processing of stimuli previously received by the processing module operating in a standby condition, reading the state information of each of the two processing modules, and comparing the state information of said two processing modules to determine if their state information is synchronized, and resuming processing extraordinary stimuli by the actively operating processing module. | 2009-12-03 |
20090296698 | DATA SWITCHING METHOD AND CIRCUIT - For restricting a scale increase of a switch device using a shared buffer, segments are received at input ports with each phase being shifted and are each composed of a predetermined length data in which each data is connected in series by a predetermined number. The segments are written in shared buffers at the same address in sequence for each segment, where the shared buffers are provided in parallel by the predetermined number. The address for each output port set in each segment is stored each time the writing is performed and the stored address is referred to in the sequence for each output port thereby to read each predetermined length data based on the address referred to from each shared buffer. Each predetermined length data read is connected in series and outputted to each output port. | 2009-12-03 |
20090296699 | PROGRAMMABLE NETWORK INTERFACE CARD - A computing system comprises a programmable network interface card and a host comprising a memory and a transport handler. The programmable network interface card may process a frame received over a network, and determine whether packet data included in the frame is to be directly placed in a first region in a memory. The programmable network interface may comprise a network direct memory access engine (NDE), which may cause transfer of the packet data directly to the first region in the memory if the packet data is to be directly placed into the first region in the memory. The programmable network interface card may cause transfer of the packet data to the transport handler in response to determining that the packet data is not to be directly placed in the first region in the memory. | 2009-12-03 |
20090296700 | APPLICATION LEVELS OF SERVICE OVER A NETWORK - Methods, systems, devices, and software are disclosed for providing application levels of service over a network. Embodiments of the invention maintain a list of registered applications (or application providers) that have registered with a network resources provider. Customers of the network resources provider may authenticate some or all of the registered applications, indicating a desire to allow traffic relating to those applications over their access networks. Customers may further set application levels of service with respect to those authenticated applications. Certain embodiments may use the registrations, authentications, service level settings, and/or other related information to generate application service level protocol data. This ASLP data may then be used to make data handling determinations for managing the flow of network traffic according to agreed service levels at the application level. | 2009-12-03 |
20090296701 | METHOD AND APPARATUS FOR IMPROVING CHANNEL ACQUISITION - A method and apparatus for improving channel acquisition times are disclosed. For example, the method includes receiving at a router a data stream destined to one or more subscribers. Then, the method generates at said router at least one new access point in between two access points of said data stream. The method concludes by forwarding said at least one new access point upon detecting a request from a subscriber for receiving said data stream. | 2009-12-03 |
20090296702 | BANDWIDTH RESERVATION FOR AUTHENTICATED APPLICATIONS - Methods, systems, devices, and software are disclosed for providing application levels of service over a network. Embodiments of the invention maintain a list of registered applications (or application providers) that have registered with a network resources provider. Customers of the network resources provider may authenticate some or all of the registered applications, indicating a desire to allow traffic relating to those applications over their access networks. Customers may further set application levels of service with respect to those authenticated applications. Certain embodiments may manage network traffic to accord with the application levels of service. | 2009-12-03 |
20090296703 | Method and system for dynamic roaming across wireless networks - The invention relates to a dynamic roaming technology across wireless networks. According to the invention, a mobile device can roam between different networks with seamless quality by utilizing a plurality of connections for dispatching packets of a task. The invention provides a capability of processing a huge amount of data such as real time video communication during roaming between different wireless communication systems with seamless quality. | 2009-12-03 |
20090296704 | METHOD FOR MULTI-PATH SOURCE ROUTING IN SENSOR NETWORK - A method for a multi-path source routing in a sensor network. In the sensor network including a sink node and a plurality of sensor nodes, the sensor network transmits data packets through a downlink route set based on a routing table generated by collecting uplink neighbor information of each sensor node from a control message for initializing a network and an uplink route formed by using uplink neighbors of each sensor node. Uplink neighbors for transmitting data from each sensor node to the sink node by performing a network initialization process and acquires the information in the sink node to generate the multi-path is maintained. As a result, it has advantages of reducing a control message overhead while using the multi-path and increasing scalability and energy efficiency by keeping a routing table small in the sensor node regardless of the size of the network. | 2009-12-03 |
20090296705 | Switch device, storage system, and routing method - A switch device includes two cascade ports each connected to another switch device; at least one direct port connected to a storage medium; a hop-count determining unit that determines whether a frame input from one cascade port has already gone through a predetermined number of switch devices; an output unit that outputs the frame from another cascade port when it is determined that the frame has not gone through the predetermined number of switch devices; and a port determining unit that determines a direct port for outputting the frame when it is determined that the frame has already gone through the predetermined number of switch devices. | 2009-12-03 |
20090296706 | METHOD, SYSTEM AND PROCESSOR FOR PROCESSING NETWORK ADDRESS TRANSLATION SERVICE - A method, a system, and a processor for processing a network address translation (NAT) service are provided. The method includes: performing NAT service identification of a received message, and selecting a corresponding NAT service processor for processing a NAT service of a message that needs a NAT service processing from at least two NAT service processors. Through embodiments of the disclosure, a demand for the system to process a lot of NAT services within a short time is fulfilled, so as to increase the capacity of processing NAT services of the system. | 2009-12-03 |
20090296707 | METHOD AND APPARATUS FOR USING INTERNET PROTOCOL TELEVISION SERVICE BASED ON APPLICATION RECEIVED IN MULTICAST SESSION - Provided is a method and apparatus in which information about a multicast session which provides an application associated with a predetermined Internet protocol television (IPTV) service is received and the application is received in the multicast session established based on the received information. | 2009-12-03 |
20090296708 | LAYERED MULTICAST AND FAIR BANDWIDTH ALLOCATION AND PACKET PRIORITIZATION - Embodiments include an overlay multicast network. The overlay multicast network may provide a set of features to ensure reliable and timely arrival of multicast data. The embodiments include a congestion control system that may prioritize designated layers of data within a data stream over other layers of the same data stream. Each data stream transmitted over the network may be given an equal share of the bandwidth. Addressing in routing tables maintained by routers in the may utilize summarized addressing based on the difference in location of the router and destination address. Summarization levels may be adjusted to minimize travel distances for packets in the network. Data from high priority data stream layers may also be retransmitted upon request from a destination machine to ensure reliable delivery of data. | 2009-12-03 |
20090296709 | METHOD AND SYSTEM FOR SWITCHING MULTICAST TRAFFIC AND ROUTER - A method for switching multicast traffic includes: entering, by a second router, a waiting state after receiving a packet indicative of recovery of a first router; and deleting, by the second router, the egress interface of MFIB entries on the second router after receiving a data packet or an Assert packet from the first router. A router and a system for switching multicast traffic are also provided herein. | 2009-12-03 |
20090296710 | System and Method for Obtaining Network Link State Information From Sequential Distance Vector Routing Tables - A method of determining the state of network links based on differences in corresponding distance-vectors in a sequence routing table updates, and a network management system performing the method. The network management system comprises least one monitoring apparatus adapted to determine the state of network links. The monitoring apparatus may be a router in the network adapted to determine link status, or a personal computer or server peered with a router and configured to determine the state of network links based on differences in corresponding distance-vectors in a sequence of routing table updates. | 2009-12-03 |
20090296711 | AFFINITY-BASED TRANSACTION PROCESSING - A transaction message is received at a router. A determination is made whether the transaction message includes an affinity. The affinity indicates an administrator-specified preference regarding processing of the transaction message. When the transaction message includes the affinity, a server system to process the transaction message is identified based on the affinity and based on a system affinity of the server system. The system affinity specifies processing characteristics of the server system. The server system includes a set of servers. The transaction message is modified to identify the server system and routed to a message queue. | 2009-12-03 |
20090296712 | METHODS AND DEVICES FOR CEC BLOCK TERMINATION - A CEC block termination function, operated by a manipulating switch including at least one HDMI-CEC input port and at least two HDMI-CEC output ports, enables the manipulating switch to receive a CEC block which was initiated by a device, optionally acknowledge (ACK) the block, modify the received block, and supply the modified block to one or more devices. Optionally, a section of the CEC block may be modified, the entire CEC block may be modified, or the CEC message may be partially or completely modified. | 2009-12-03 |
20090296713 | DECOUPLING FUNCTIONALITY RELATED TO PROVIDING A TRANSPARENT LOCAL AREA NETWORK SEGMENT SERVICE - A transport LAN segment service is provided over a transport network. Responsibilities for configuring, provisioning and forwarding over a transport LAN segment are divided between layer 2 and 3 service provider edge devices, where the layer 3 edge device handles discovery and tunneling responsibilities, the layer 2 edge device handles learning and flooding responsibilities, and information can be exchanged between the layer 2 and 3 edge devices. Configuration is simplified by advertising TLS-label information, layer 2 address learning, and flooding when the needed configuration information has not yet been learned or discovered. | 2009-12-03 |
20090296714 | SCALABLE MULTIPROTOCOL LABEL SWITCHING BASED VIRTUAL PRIVATE NETWORKS AND METHODS TO IMPLEMENT THE SAME - Example scalable multi-protocol label switching (MPLS) based virtual private networks (VPNs) and methods to implement the same are disclosed. A disclosed example spoke provider edge (PE) router for an MPLS-based VPN includes a truncated virtual routing and forwarding (VRF) table containing a first value referencing a hub PE router and a second value referencing a first customer edge (CE) router coupled to the VPN via the PE router, and a forwarding module to forward a packet received from the first CE router to the hub PE router when the packet contains an address referencing a second CE router coupled to the VPN via a second spoke PE router. | 2009-12-03 |
20090296715 | METHOD AND SYSTEM FOR PROGRAMMABLE DATA DEPENDANT NETWORK ROUTING - A method and system for routing fibre channel frames using a fibre channel switch element is provided. The switch element includes, a look up table that is indexed by domain, area, a virtual storage area number and/or AL_PA values of frames entering the fibre channel switch element; and logic for generating a column select signal that is used to select a column from the look up table for frame routing information The switch element also includes logic for validating a frame route by performing word depth match. A register is used to load look up table entries and column entries are selected based on the column select signal. The method includes, indexing a look up table with plural fibre channel frame header values; selecting a table value for routing a fibre channel frame based on a column select signal; and routing the frame if a route is valid. | 2009-12-03 |
20090296716 | METHOD AND SYSTEM FOR PROGRAMMABLE DATA DEPENDANT NETWORK ROUTING - A method and system for routing fibre channel frames using a fibre channel switch element is provided. The switch element includes, a hashing module whose output is used to select the column from a look up table to route frames. The method includes, indexing a look up table using domain, area, virtual storage area network identifier, a hashing module output and/or AL_PA values; selecting a column from the look up table based on a column select signal; and routing a frame if a route is valid. The hashing module takes a fibre channel header to generate a pseudo random value used for selecting a column from the look up table. The hashing module uses same field values in an exchange to generate the pseudo random value. A hash function is used on a frame's OX_ID, D_ID, S_ID, and/or RX_ID to route fibre channel frames. | 2009-12-03 |
20090296717 | VLAN PROTOCOL - A switch controller includes a plurality of ports, a hash table, and a hash table control unit. The plurality of ports includes at least one bus port associated with ports connected to other switch controllers. The hash table stores MAC addresses and VLAN ids of ports within a network. The hash table control unit hashes a MAC address and a VLAN id of a packet to a first hash table location. | 2009-12-03 |
20090296718 | Device Virtualization - Methods and apparatus for device virtualization and for communication between network devices are described. In one example, all devices on a first Local Area Network (LAN | 2009-12-03 |
20090296719 | Method for Configuring an Optical Network - A network model for the planning and/or the provisioning of traffic flows in a communication network includes nodes interconnected with each other by links according to a given network topology. The network model uses a graph defined by arc objects storing information related to both the links and adjacent nodes thereof. | 2009-12-03 |
20090296720 | Transmitting apparatus and transmitting method - A transmitting apparatus obtains cross-connect information on an input side and an output side, reserves the information as a cross-connect for management shift, adds object information formed of that cross-connect information and others to a signaling message for transmission and reception, and also updates the reserved cross-connect for management shift to shift path management. | 2009-12-03 |
20090296721 | METHOD FOR MANAGING IP TUNNELS - A method for managing Internet Protocol (IP) tunnels is provided. The method is executed by a local host. There is at least one IP tunnel planned between the local host and a remote host. The method comprises the following steps. If the local addresses of the tunnels include dynamic IP addresses, acquire the dynamic IP addresses. All tunnels with known remote addresses are built. If there are known remote addresses and the local addresses include dynamic IP addresses, send a notification to the remote host, wherein the notification includes all local dynamic IP addresses. If any local address changes, all tunnels with changed local addresses and known remote addresses are rebuilt. A message is received from the remote host and classified. If the message is a notification, the tunnels are updated according to the remote addresses included in the message, and an acknowledgement is sent back to the remote host. | 2009-12-03 |
20090296722 | Modular power line repeater and system - A data router or data switch connected to a medium and having private addresses bounded to a specific subsegment of and address range, and a user-selectable number of data repeaters also connected to the medium in a sequence of overlapping address ranges, in which a data repeater communicates upstream with a prior data repeater (or if it is the first repeater, the data router) and provides a data path to subsequent data repeaters over a different subsegments of that range by address translation, permitting extension of the usable range of the resulting network without the need for data-blocking filters on the medium, and without interference generated by the repeaters. | 2009-12-03 |
20090296723 | Multi-computer switch with function of transmitting data between computers - A multi-computer switch with a function of transmitting data between computers includes a multiple of hub units, at least one data transmission control unit and a switching interface control unit. Each hub unit includes an upstream port and a multiple of downstream ports. The upstream port is connected to a computer system, and each downstream port further includes at least one first downstream port and at least one second downstream port. The data transmission control unit is bridged to a first downstream port of any two hub units for transmitting data between computer systems connected to the two hub units according to a data exchange signal. The switching interface control unit switches and connects at least one first common peripheral to the second downstream port of one of the hub units to achieve the effect of timely transmitting data in different computers. | 2009-12-03 |
20090296724 | Gateway apparatus - A gateway apparatus relays a data packet only when a network that is connected to the gateway apparatus itself is identical to a network that is connected to a node associated with a sender's address. The sender's address is carried in the data packet received. Even if there are accesses from a plurality of nodes to a certain node (e.g., sensor node), the gateway apparatus can relay the data packet such that data retrieval takes place appropriately and/or such that node control takes place appropriately. | 2009-12-03 |
20090296725 | Router device for efficient routing with congestion minimized - In a router, a receiver receives a communication packet meant for a communication destination other than this router device. A calculator calculates a cost value for forwarding a communication packet to a destination by each of neighboring routers adjacent to the router. A next-router determiner selects a neighboring router as a next router based on the cost value calculated to supply the determined information and the communication packet to a transmitter, which transmits the communication packet to the destination based on the determined information. The calculator calculates the cost value based on the node degree of the neighboring routers and the number of hops of the communication packet from the neighboring routers to the destination. | 2009-12-03 |
20090296726 | ACCESS CONTROL LIST MANAGEMENT IN AN FCoE ENVIRONMENT - A Fibre Channel Forwarder (FCF) suspends a fabric session with a virtual machine (VM) in response to receipt of a deregister message from the virtual machine through an Ethernet bridge and transmits a deregister acceptance message to the VM. The Ethernet bridge detects the messages and updates its Access Control List (ACL) to remove the MAC address of the VM. While the fabric session is suspended, a virtual machine may migrate to another physical machine without terminating its connection to the fabric. After migration, the FCF resumes its fabric session with the VM in response to receipt of a register message from the VM through a second Ethernet bridge. The FCF responds to the register message with a register acceptance message. The Ethernet bridge detects the messages and updates its Access Control List (ACL) to add the MAC address of the VM. | 2009-12-03 |
20090296727 | Method and Apparatus to Count MAC Moves at Line Rate - A method and apparatus for counting Media Access Control (MAC) address moves at line rate is described. According to one embodiment of the invention, a line card in a network bridge receives a frame at a port having a source MAC address that is associated with a different port of the network bridge. The line card signals a control card of the network bridge that the source MAC address has moved. The control card processes the source MAC address move and increments a MAC address move counter. If the MAC address move counter exceeds a MAC address move count threshold for a given time interval, the control card signals each line card in the network bridge to count each frame they receive on any port having that source MAC address. Other methods and apparatuses are also described. | 2009-12-03 |
20090296728 | Method and Apparatus for Prioritizing Source MAC Address Miss Processing - A method and apparatus for prioritizing source Media Access Control (MAC) address miss processing is described. In one embodiment of the invention, a network bridge receives multiple frames (each including a source MAC address) at multiple ports of multiple line cards. If a source MAC address of a received frame is associated with a different port than which it was received on, the network bridge places a source MAC miss message in a high priority MAC move miss queue. If a source MAC address of a received frame is not associated with any of the ports of the network bridge, the network bridge places a source MAC miss message in a low priority unknown MAC miss queue. The network bridge processes those source MAC miss messages in the high priority queue with a higher priority than processing those source MAC miss messages in the low priority queue. | 2009-12-03 |
20090296729 | DATA OUTPUT APPARATUS, COMMUNICATION APPARATUS AND SWITCH APPARATUS - A data communication apparatus has a data retainer, a retain state manager, a guaranteed bandwidth manager, a surplus bandwidth manager managing outputting of output data having a destination retained in the data retainer to an output line on a per-destination basis when the output data is outputted to the output line with the use of a surplus bandwidth that is a surplus over a sum of guaranteed bandwidths, and a scheduler scheduling outputting of data retained in the data retainer to the output line, based on results of managements by the guaranteed bandwidth manager and the surplus bandwidth manager and a retain state managed by the retain state manager. The apparatus manages the bandwidth with improved accuracy at the time of communication using a surplus bandwidth, | 2009-12-03 |
20090296730 | Intermittently operable communication apparatus with different carrier sense levels switched between transmission and reception and method therefor - The communication apparatus intermittently carries out receiving operation during a predetermined reception period. The apparatus includes a wireless communication section for carrying out wireless communication, which includes a carrier sensor for sensing a carrier at the beginning of the communication, and a carrier sense switching section for using carrier sense levels different between packet transmission and reception to switch the carrier sense level of the carrier sensor according to the packet. Thus, the apparatus can use and flexibly adjust the optimum carrier sense level for the intermittent receiving operation within the reception period. | 2009-12-03 |
20090296731 | METHODS FOR ADDRESS ASSIGNMENT - Methods for CEC logical address assignments and HDMI physical address assignments. Some embodiments determine a required HDMI physical address to be assigned to an upstream HDMI-CEC device and provide the required HDMI physical address. Other embodiments assign consistent CEC logical addresses to a plurality of HDMI-CEC display devices in different HDMI-CEC network views. | 2009-12-03 |
20090296732 | EFFICIENT ALLOCATION OF SHARED BANDWIDTH - The present invention, generally speaking, provides for sharing of bandwidth of a shared medium between multiple devices. In one embodiment, the shared medium is structured in accordance with a frame or superframe structure, each frame or superframe having medium access slots of specified time duration defined therein, groups of N contiguous medium access slots defining different allocations zones, groups of M medium access slots defining coordinated sets of medium access slots, wherein the medium access slots of a coordinated set belonging to different allocation zones are equally spaced in time. A device identifies a reservation as regular or irregular, wherein a regular reservation causes the entire medium access slots in one or more coordinated sets to be allocated. In the case of either a regular or an irregular reservation, allocating medium access slots such that a number of unallocated contiguous medium access slots within each allocation zone is maximized. The contiguous unallocated medium access slots separate the group of regular allocations and the group of irregular allocations within each allocation zone. | 2009-12-03 |
20090296733 | METHOD AND APPARATUS FOR ALLOCATING TIME SLOTS IN BASEBAND EPCN SYSTEM - A method and apparatus for allocating time slots in a baseband EPCN system is provided. The method includes: obtaining a period type of a current period; and determining a proportion between uplink time slots and downlink time slots for the current period according to the period type. According to present invention, different proportions between uplink time slots and downlink time slots may be respectively applied to different periods such as a registration period and a communication period in the baseband EPCN system. Thus, the register time of a new CNU in the registration period is shortened and the requirement for high downlink bandwidth for normal communications in the communication period is guaranteed at the same time. | 2009-12-03 |
20090296734 | End-To-End Service Quality for Latency-Intensive Internet Protocol (IP) Applications in a Heterogeneous, Multi-Vendor Environment - Apparatus and methods are provided for delivering end-to-end Quality of Service (QoS) over Internet Protocol (IP) networks. According to one embodiment, a portion of available bandwidth between a first and second network device is reserved as a Quality of Service (QoS) resource pool for real-time communication sessions among users of a first and second user community. The first network device is communicatively coupled with a packet network and associated with the first user community. The second network device is communicatively coupled with the packet network and associated with the second user community. End-to-end application QoS is provided between the first and second user communities by selectively admitting real-time communication sessions between the first user community and the second user community based upon currently available resources associated with the QoS resource pool and multiplexing the real-time communication sessions over a reservation protocol session between the first and second network devices. | 2009-12-03 |
20090296735 | Software assisted multicast filtering - A method is described including determining if a packet length parameter included in received data matches a first pre-determined value, determining if an address parameter included in received data matches an address of a receiving device, determining if a length parameter included in received data matches a second pre-determined value, determining if a packet destination port number parameter included in received data matches a third pre-determined value, determining if a packet payload type parameter included in received data matches a fourth pre-determined value and dropping the packet responsive to the matches. | 2009-12-03 |
20090296736 | Method for transferring data in an automation system - A method of transferring data in an automation system having a plurality of communicatively connected communication stations is provided. The communicative connection of the communication stations follows a predefined hierarchy, in which a plurality of communication stations are grouped together in a line and an alias matched to the hierarchy is assigned to each communication station. Telegrams sent in the automation system designate a destination communication station also by its alias, whereby each line is closed to form a ring by way of its transition, designated as entry point, from the next higher line by way of the entry point, and telegrams in the ring thus resulting with the line are forwarded both in the direction of the hierarchy of the allocated alias designations and also in the opposite direction. | 2009-12-03 |
20090296737 | METHOD AND SYSTEM FOR CONNECTING TWO NODES OVER MULTIPLE COMMUNICATION LINKS - A communications system to inverse multiplex media communication traffic from a high-speed communication link into a plurality of low-speed communication links, wherein each low-speed link can use a different physical line, having different speeds, and wherein the communication over each link can comply with different communication protocols and can be connected on different networks, and then combined the media communication traffic at the other end. The system may include a transmitting inverse multiplexer and a receiving multiplexer. The transmitting inverse multiplexer can be connected to an egress of one of the nodes as the high-speed communication link. The receiving multiplexer can be connected to ingress of a second node as the other side of the high-speed communication link. The transmitting inverse multiplexer and the receiving multiplexer can communicate over a plurality of communication links. Each communication link can be connected to a different network using a different physical line. | 2009-12-03 |
20090296738 | Method and apparatus for frame relay - In a frame relay apparatus or a frame relay method, in order to be able to transfer data between channels having different maximum transfer units, payloads are fragmentized or combined and assembled into a frame, in response to the maximum transfer units of the channels. Fragmentized payloads are associated with the original data. By doing so, especially the number of frames in a channel with a large maximum transfer unit is controlled, and the transfer efficiency of frames of the entire network may be improved. | 2009-12-03 |
20090296739 | COMMUNICATION DEVICE AND COMMUNICATION METHOD THEREOF - A first control data generation unit configured to generate first control data, a control data allocation processing unit configured to perform allocation processing for the first control data in order to reserve an area for the first control data in a frame memory, a data write control unit configured to write user data in an area in the frame memory except the area where the allocation processing is performed, and a transmission unit configured to transmit transmission data based on the data written in the frame memory are included, and the data write control unit writes the generated first control data in the area where the allocation processing is performed in the frame memory after generation of the first control data and after the allocation processing of the first control data and after writing the user data and before the transmission data is transmitted. | 2009-12-03 |
20090296740 | Providing a prefix for a packet header - In one embodiment, the present invention includes a method for generating a prefix header with an opcode field and a prefix specific field for a first packet to be transmitted from a transmitter, and transmitting the packet from the transmitter with the prefix header, which is followed by a header. Other embodiments are described and claimed. | 2009-12-03 |
20090296741 | VIDEO PROCESSOR AND VIDEO PROCESSING METHOD - According to one embodiment, a video processor includes an interface module which sequentially receives two video and audio multiplex streams to be spliced as a preceding stream and a following stream, and a stream converting module which sequentially extracts time information monotonously increasing in each of the preceding stream and the following stream received by the interface module and performs rewriting for shifting one time information of either the preceding stream or the following stream in lump such that the time information is continuous at a splice point between the preceding stream and the following stream. | 2009-12-03 |
20090296742 | CLOSE PROXIMITY COMMUNICATION DEVICE AND METHODS - Methods and apparatus for providing close proximity detection in medical systems are disclosed. | 2009-12-03 |
20090296743 | Mid-Infrared Fiber Laser Using Cascaded Raman Wavelength Shifting - A mid-infrared system for optical probing is disclosed that comprises a mid-infrared fiber laser based on cascaded Raman wavelength shifting, a sample volume, and a detector or detection system. The cascaded Raman wavelength shifting process in optical fibers involves the emission of a plurality of optical phonons for at least some of the pump photonics involved in the process. As one example, using the cascaded Raman wavelength shifting process a pump laser wavelength between 1 and 2 μm can be shifted down to between 2.5 to 10 μm. In one embodiment, the mid-infrared fiber laser comprises a pump laser with a wavelength between 1 and 2 μm, one or more stages of cascaded Raman oscillators implemented in fused silica fiber, and one or more stages of cascaded Raman oscillators implemented in mid-infrared fiber that transmits beyond 2 μm. Examples of mid-infrared fibers include chalcogenides, fluorides and tellurite fibers. The output wavelength from the mid-infrared fiber laser is at an exemplary wavelength longer than 2.5 μm. The mid-infrared optical probing system can be used in applications such as semiconductor process control, combustion monitoring for engines, and defense or homeland security applications such as chemical sensing and infrared counter-measures. | 2009-12-03 |
20090296744 | Laser Based Identification of Molecular Characteristics - Enantiomers are characterized, identified, synthesized and/or modified with a shaped laser pulse. In another aspect of the present invention, binary shaping and circular polarization are employed with a laser pulse. A further aspect of the present invention provides a quarter-wave plate in combination with one or more pulse shapers. | 2009-12-03 |
20090296745 | HIGH-POWER FIBER AMPLIFIER EMPLOYING MULTI-POINT PUMP COUPLING VIA COILED GAIN FIBER - An apparatus that may be used as part of an optical amplifier or laser includes a pump fiber carrying pump light from a pump source and a clad gain fiber which includes a number of coils arranged with the pump fiber to form a pump coupler. The pump coupler includes (i) a coupling section of the pump fiber, (ii) a coupling section of each of the coils of the gain fiber arranged adjacent to the coupling section of the pump fiber, (iii) an index- matching material disposed between the coupling section of the pump fiber and the coupling sections of the gain fiber to provide a high degree of coupling of the pump light from the pump fiber to the gain fiber, and (iv) a low-index material at outward-facing surfaces of the coupling sections of the gain fiber. The coupling sections of the pump fiber and of the coils of the gain fiber along with the index-matching material form a waveguide exhibiting an oscillating characteristic of coupling efficiency versus coupling length. The lengths of the coupling sections are selected to correspond to a selected maximum of the oscillating characteristic for high-efficiency coupling of the pump light from the pump fiber to the gain fiber in the pump coupler. | 2009-12-03 |
20090296746 | FIBER LASER COIL FORM AND RELATED MANUFACTURING TECHNIQUES - A fiber laser thermal coil form and related manufacturing techniques that are substantially suitable for automation. The fiber laser thermal coil form including a thermally conductive substrate to support a fiber placed thereon and to dissipate a heat of the fiber, and a fiber guide groove defined in a surface of the substrate to guide the fiber and dimensioned to partially enclose the fiber and to enhance a thermal contact of the fiber and the substrate. | 2009-12-03 |
20090296747 | PHASED LASER ARRAY WITH TAILORED SPECTRAL AND COHERENCE PROPERTIES - Architectures for coherently combining an array of fiber-based lasers are provided. By matching their lengths to within a few integer multiples of a wavelength, the spatial and temporal properties of a single large laser are replicated, while extending the average or peak pulsed power limit. | 2009-12-03 |
20090296748 | LASER SYSTEMS AND MATERIAL PROCESSING - A diode pumped laser is disclosed having a CW level and adapted to output one or more pulses having peak power greater than the CW level thereby to provide higher peak power for use in material piercing or penetrating operations without affecting diode lifetime. | 2009-12-03 |
20090296749 | SCANNING TEMPORAL ULTRAFAST DELAY AND METHODS AND APPARATUSES THEREFOR - The present invention is directed to methods and apparatuses for performing temporal scanning using ultra-short pulsewidth lasers in which only minimal (micro-scale) mechanical movement is required. The invention also relates to methods for obtaining high-accuracy timing calibration, on the order of femtoseconds. A dual laser system is disclosed in which the cavity of one or more of the lasers is dithered, by using a piezoelectric element. A Fabry-Perot etalon is used to generate a sequence of timing pulses used in conjunction with a laser beam produced by the laser having the dithered laser cavity. A correlator correlates a laser pulse from one of the lasers with the sequence of timing pulses to produce a calibrated time scale. The methods and apparatuses of the present invention are applicable to many applications requiring rapid scanning and time calibration, including, but not limited to metrology, characterization of charge dynamics in semiconductors, electro-optic testing of ultrafast electronic and optoelectronic devices, optical time domain reflectometry, and electro-optic sampling oscilloscopes. | 2009-12-03 |
20090296750 | Two-Color Double-Pulsed Laser for the Ignition of an Internal Combustion Engine - A laser device having a cavity which has a first laser-active region and at least one second laser-active region having a passive Q-switch as well as mirrors bound the cavity, the first laser-active region emitting light of a first wavelength, as a result of having pumping light applied to it, for which the cavity is developed as a resonator. The second laser-active region, having the passive Q-switch, in turn emits the light of a second wavelength, as a result of the application of the light of the first wavelength. The cavity is also developed as a resonator for the light of the second wavelength. | 2009-12-03 |
20090296751 | ELECTRONICALLY PHASE-LOCKED LASER SYSTEMS - Semiconductor diode lasers are phase-locked by direct current injection and combined to form a single coherent output beam. The optical power is amplified by use of fiber amplifiers. Electronically control of the optical phases of each emitter enables power efficient combining of output beams to be maintained under dynamic conditions. | 2009-12-03 |
20090296752 | MULTIPLE EMITTER VECSEL - An extended cavity surface emitting laser has a first laser die with a first cavity and a first gain element and a second laser die with a second cavity and a second gain element. The first and second gain elements are in series to provide optical gain and optical feedback in an extended optical cavity configuration. The first and second gain elements provide optical gain and optical feedback in a common extended cavity with the first and second gain elements operating serially as a common extended cavity optical mode. | 2009-12-03 |
20090296753 | SEMICONDUCTOR LASER AND OPTICAL INTEGRATED SEMICONDUCTOR DEVICE - A tunable distributed feedback semiconductor laser includes a substrate; an optical waveguide structure disposed on a main surface of the substrate and including an active layer and a diffraction grating, the optical waveguide structure being divided into a first DFB portion, a wavelength-tuning region, and a second DFB portion in that order; a first electrode for injecting carriers into the active layer in the first DFB portion; a second electrode for injecting carriers into the active layer in the second DFB portion; and a third electrode for supplying a wavelength tuning signal to the wavelength-tuning region. The diffraction grating extends over the first DFB portion, the wavelength-tuning region, and the second DFB portion. An optical confinement factor of the wavelength-tuning region is smaller than that of the first and second DFB portions. | 2009-12-03 |
20090296754 | Optoelectric Device for High-Speed Data Transfer with Electrooptically Tunable Stopband Edge of a Bragg-Reflector - A device contains at least one wavelength-tunable multilayer interference reflector controlled by an applied voltage and at least one cavity. The stopband edge wavelength of the wavelength-tunable multilayer interference reflector is preferably electrooptically tuned using the quantum confined Stark effect in the vicinity of the cavity mode (or a composite cavity mode), resulting in a modulated transmittance of the multilayer interference reflector. A light-emitting medium is preferably introduced in the cavity or in one of the cavities permitting the optoelectronic device to work as an intensity-modulated light-emitting diode or diode laser by applying an injection current. The device preferably contains at least three electric contacts to apply forward or reverse bias and may operate as a vertical cavity surface-emitting light emitter or modulator or as an edge-emitting light emitter or modulator. Using a multilayer interference reflector containing tunable section allows also obtaining a wavelength-tunable laser or a wavelength-tunable resonant cavity photodetector in the case where the optical field profile in the active cavity or cavities is affected by the stopband wavelength shift. Adding additional modulator sections enables applications in semiconductor optical amplifiers, frequency converters or lock-in optical amplifiers. | 2009-12-03 |
20090296755 | Laser system - A method and apparatus may comprise a laser light source system which may comprise a solid state laser seed beam source providing a seed laser output; a frequency conversion stage converting the seed laser output to a wavelength suitable for seeding an excimer or molecular fluorine gas discharge laser; an excimer or molecular fluorine gas discharge laser gain medium amplifying the converted seed laser output to produce a gas discharge laser output at approximately the converted wavelength. The excimer or molecular fluorine laser may be selected from a group comprising XeCl, XeF, KrF, ArF and F | 2009-12-03 |
20090296756 | Laser Frequency Multiplier with Temperature Control - Disclosed is a laser apparatus. The apparatus includes a frequency multiplier to multiply a first frequency of laser radiation to a second frequency, the frequency multiplier having a temperature that can vary over a temperature range, and a controller to control the temperature of the frequency multiplier to regulate the level of laser radiation exiting the frequency multiplier. | 2009-12-03 |
20090296757 | MANUFACTURING METHOD OF OLED DISPLAY AND APPARATUS FOR MANUFACTURING THE OLED DISPLAY - A manufacturing method of an active matrix organic light emitting diode (AMOLED) display and an apparatus for manufacturing the AMOLED display, where the display has improved surface flatness and thickness uniformity as well as an improved image quality at edge regions of a pattern. According to the exemplary embodiment of the present invention, an anode electrode is formed on a lower structure of a substrate, an organic layer is formed on the anode electrode by imaging a complex laser beam on a donor film disposed on the substrate having light emitting materials, the complex laser beam having energy distribution inclination over 2%/μm at a threshold energy. The donor film is removed, and a cathode electrode is formed on the organic layer. | 2009-12-03 |
20090296758 | Laser system - An apparatus/method may comprise a line narrowed pulsed lithography laser light source which may comprise: a seed pulse providing laser system which may comprise: a first pulsed seed laser producing seed pulses at a rate of X kHz; a second pulsed seed laser producing seed pulses at a rate of X kHz; an amplification system which may comprise: a first amplifier gain system which may comprise a first and a second pulsed gas discharge amplifier gain medium, each with a nominal center wavelength in the UV range, and each operating at ½ X kHz on output pulses from the first seed laser; a second amplifier gain system which may comprise a first and a second pulsed amplifier gain medium, each with a nominal center wavelength in the UV range, and each operating at ½ X kHz on output pulses from the second seed laser. | 2009-12-03 |
20090296759 | SEQUENTIALLY-MODULATED DIODE-LASER SEED-PULSE GENERATOR - A modulated diode-laser provides a first sequence of optical pulses. The first sequence of optical pulses is further modulated to provide a second sequence of optical pulses. Pulses in the second sequence have a shorter duration than pulses in the first sequence. | 2009-12-03 |
20090296760 | Optical Pumping Apparatus and Method to Reduce AC Stark Shift in Atomic Frequency Standards - An optical pumping atomic frequency apparatus for producing an oscillation signal with a stable frequency comprises a cell containing atomic particles of a quantum absorber material whose atomic particles have two clock transition states and first and second excited states. A static bias magnetic field is provided at the cell. A first electromagnetic (EM) field is provided to the cell, to excite transitions between at least one of the clock transition states and at least one of the first and second excited states due to absorption of the first EM field by the atomic particles in the at least one of the clock transition states, in order to alter the relative population of the atomic particles. A second EM field is applied to the cell, to induce transitions between the two clock transition states, so that the absorption of the first EM field by the atomic particles increases. Absorption of the first EM field is detected. The frequency spectrum of the first and second EM fields are controlled; so that the frequency of the output oscillating signal is related to the clock transition frequency. The interactions between the atomic particles and the first EM field cause a light shift as a function of the intensity and the frequency of the first EM field, the light shift having a characteristic curve. The light shift has an absolute value which is related to the frequency and polarization of the first EM field, and the frequency and polarization are chosen to reduce the absolute value of the light shift. The light shift curve has a slope at the frequency which corresponds with an energy difference between the at least one of the clock states and the at least one of the first and second excited states, the slope thereat related to the chemical composition and partial pressure of the buffer gas in the cell. The composition and pressure of the buffer gas reduce the absolute value of the slope of the light shift curve of the clock transition frequency to approximately zero. | 2009-12-03 |
20090296761 | Optical device including a bimorph-type piezoelectric element - An optical device includes optical parts including a laser diode element accommodated in a housing. A bimorph-type piezoelectric element is arranged in a vicinity of the laser diode element and has a free end contacting one of the laser diode element, a support member supporting the laser diode element, and the housing. A control circuit controls an operation of the bimorph-type piezoelectric element. | 2009-12-03 |
20090296762 | Light Emitting Apparatus, Optical Scanning Apparatus, And Image Forming Apparatus - A light emitting apparatus includes a surface emitting laser and a ceramic package. The surface emitting laser has a common electrode on the back surface thereof and is mounted on the ceramic package via the common electrode. The common electrode of the surface emitting laser is electrically connected to a mount portion of the ceramic package. The mount portion is electrically connected to a back-surface electrode on the back surface of the ceramic package. The mount portion is also thermally connected to a back-surface heat-dissipating electrode on the back surface of the ceramic package via a penetrating electrode that penetrates the ceramic package. The surface emitting laser is spaced apart from the penetrating electrode in order to prevent inclination in light-emitted direction. The back-surface heat-dissipating electrode prevents destruction of a soldered portion when the light emitting apparatus is mounted on a substrate by soldering. | 2009-12-03 |
20090296763 | LIGHT OUTPUT DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE LIGHT OUTPUT DEVICE - A light output device includes: an output unit including a light source; a control voltage generation unit that detects output power of the light source, and generates a control voltage for controlling a drive current of the light source; a control unit that sets a target value of the output power; a voltage-current conversion unit that converts the control voltage into the drive current; a setting unit that sets an inclination of a characteristic line of control voltage-drive current conversion in the voltage-current conversion unit; and an adjustment unit that adjusts the voltage-current conversion unit such that the drive current becomes a target current value for setting the output power to the target value in a predetermined control voltage value on the characteristic line, wherein the setting unit sets the inclination of the characteristic line to a first inclination where the drive current does not reach a maximum current value. | 2009-12-03 |
20090296764 | FREQUENCY-AGILE RF-POWER EXCITATION FOR DRIVING DIFFUSION-COOLED SEALED-OFF, RF-EXCITED GAS LASERS - A gas discharge laser includes a laser housing including a laser gas and an electrode-assembly for lighting a discharge in the laser gas. The electrode assembly has a first resonant frequency when the discharge is not lit and a second resonant frequency when the discharge is lit. RF power delivering circuitry of the laser includes an arrangement for determining and recording the two resonant frequencies. RF power is applied to the electrodes at the first recorded resonant frequency to facilitate lighting of the discharge, and thereafter at the second resonant frequency to light and sustain the discharge. | 2009-12-03 |
20090296765 | SEMICONDUCTOR LASER DEVICE - A semiconductor laser device includes an n-type clad layer, an active layer, and a p-type clad layer having a ridge and wing regions. The wing regions are provided with a first trench present on one side of the ridge and a second trench provided on the other side thereof being interposed therebetween. A reflectivity Rf at a front end face of a resonator, a reflectivity Rr at a rear end face of the resonator, a minimum value W | 2009-12-03 |
20090296766 | QUANTUM DOT LASER DIODE AND METHOD OF MANUFACTURING THE SAME - Provided are a quantum dot laser diode and a method of manufacturing the same. The method of manufacturing a quantum dot laser diode includes the steps of: forming a grating structure layer including a plurality of gratings on a substrate; forming a first lattice-matched layer on the grating structure layer; forming at least one quantum dot layer having at least one quantum dot on the first lattice-matched layer; forming a second lattice-matched layer on the quantum dot layer; forming a cladding layer on the second lattice-matched layer; and forming an ohmic contact layer on the cladding layer. Consequently, it is possible to obtain high gain at a desired wavelength without affecting the uniformity of quantum dots, so that the characteristics of a laser diode can be improved. | 2009-12-03 |
20090296767 | Semiconductor Saturable Absorber Reflector and Method to Fabricate Thereof - A design of a semiconductor saturable absorber that offers a convenient and reliable way to control/decrease the recovery time of the absorption. The absorption recovery time is controlled during the epitaxial growth by using lattice-mismatched layer(s) to induce dislocations, and implicitly non-radiative recombination centers within the nonlinear absorbing region. These lattice reformation layer(s) are interposed between the distributed Bragg reflector and the nonlinear absorption region, containing quantum-wells, quantum-dots or bulk semiconductor material. The thickness and composition of the lattice reformation layer(s) is an instrumental to control the amount of non-radiative recombination centers used to trap the optically excited carriers generated in the absorption region. | 2009-12-03 |
20090296768 | VERTICAL CAVITY SURFACE EMITTING LASER (VCSEL), VCSEL ARRAY DEVICE, OPTICAL SCANNING APPARATUS, AND IMAGE FORMING APPARATUS - A vertical cavity surface emitting laser (VCSEL) includes a semiconductor substrate, a lower reflecting mirror formed on the semiconductor substrate, and a mesa structure. The mesa structure includes an active layer, a selective oxidization layer that includes a current confined structure, and an upper reflecting mirror. A lower electrode is connected to the semiconductor substrate, and an upper electrode is connected to the upper reflecting mirror. The VCSEL emits laser light perpendicularly to the plane of the semiconductor substrate when an electric current flows between the upper electrode and the lower electrode. The semiconductor substrate is inclined with respect to (100) plane. The active layer includes a quantum well layer having a compressive strain with respect to the substrate, and a spacer layer. The spacer layer has either a compressive strain or a tensile strain with respect to the semiconductor substrate. | 2009-12-03 |
20090296769 | CALIBRATION OF TEMPERATURE SENSING CIRCUITRY IN AN ELECTRONIC DEVICE - Temperature sensing circuitry is used for thermal management of an electronic device. The temperature sensing circuitry includes at least one thermistor placed at or near a component of the electronic device. The temperature sensing circuitry also includes a high-precision resistor for calibration purposes. The resistance of the resistor is equivalent to the resistance of the thermistor at a reference temperature. A calibration reading is obtained using a set current that is being passed through the resistor. An error present in the temperature sensing circuitry is determined based on the calibration reading and a design value. A temperature measurement associated with the component is then made using the thermistor, while the set current is being passed through the thermistor. The error is corrected in the temperature measurement of the component. Other embodiments are also described. | 2009-12-03 |
20090296770 | FLUORESCENT TEMPERATURE SENSOR - To provide a fluorescent temperature sensor capable of identifying easily the location of a failure. A fluorescent temperature sensor for producing a temperature signal from fluorescent light from a fluorescent material and that has been optically stimulated comprises a light projecting module having an LED for projecting light at the fluorescent material and a second photodiode for receiving light emitted from the LED and a light receiving module having a first photodiode for receiving the light emitted from the fluorescent material, where the location of a failure in the sensor can be identified based on, at least, the output signal from the second photodiode. | 2009-12-03 |