22nd week of 2009 patent applcation highlights part 27 |
Patent application number | Title | Published |
20090135782 | Correlator for primary cell search using memory architecture - An apparatus including a second stage correlator for receiving input data from a first stage correlator, wherein said second stage correlator includes a memory is described. A method for performing a second stage correlation on data including resetting a read pointer and a write pointer, alternatively multiplexing input data into one of a pair of storage registers, concatenating contents of the pair of storage registers, writing the concatenated contents into a memory in accordance with the write pointer, outputting the concatenated contents from the memory into a read register in accordance with the read pointer, updating the read address pointer and updating the write address pointer is also described. | 2009-05-28 |
20090135783 | FMIPv6 Intergration with Wimax - A fast handover protocol standard implemented on WiMAX networks integrating Internet protocol fast handover messaging. A standard for performing handover in four scenarios is offered with an embodiment for the message flow to perform the handover. The four scenarios include a mobile subscriber station initiated predictive hand-off, a network initiated predictive hand-off, a mobile subscriber station initiated reactive hand-off, and a network initiated reactive hand-off. In general, Internet Protocol control messages for fast hand-off or handover are used on the WiMAX network. Fast binding and fast binding acknowledge messages are exchanged between two WiMAX access networks in all four scenarios. Other messages used include hand-off initiate, hand-off acknowledge, proxy router advertisement, session information request, and release resources Internet Protocol control messages are integrated with WIMAX control messages to perform the fast handover protocol. | 2009-05-28 |
20090135784 | CLASSIFYING ACCESS POINTS USING PILOT IDENTIFIERS - Systems and methodologies are described that facilitate grouping pilot identifies to indicate type and/or classification information regarding one or more access points. The access points can select or be assigned pilot identifiers from the group indicating a type or classification related to the access points. Thus, identifiers can be grouped into macrocell and/or femtocell groups or ranges such that an access point can indicate, and mobile devices can efficiently determine, whether the access point provides macrocell or femtocell coverage based on a range from which its pilot identifier is selected or assigned. In addition, the pilot identifiers can be utilized to indicate restricted association information regarding the access points. | 2009-05-28 |
20090135785 | METHOD FOR FAST RADIO LINK MEASUREMENTS OF ACCESS POINT CANDIDATES FOR WLAN HANDOVER, A MOBILE TERMINAL, AN ACCESS POINT AND PROGRAM MODULES THEREOF - The invention concerns a method for fast determination of the quality of the radio link from a mobile terminal (STA) to an access point (AP | 2009-05-28 |
20090135786 | Method and Telecommunication Device for Selecting Number of Code Channels and Associated Spreading Factor for CDMA Transmission - A set of permissible parameter pairs with the parameters being a number of code channels and an associated spreading factor is determined according to at least one first selection criterion. Then a parameter pair from the set of permissible parameter pairs for the CDMA transmission is selected according to at least one second selection criterion. In this selection process, the spreading factor is used as a second selection criterion with a higher value being preferred over a lower value if both spreading factors are below or equal to a threshold spreading factor value. This accounts for the fact that in a certain regime low spreading factor involve a prohibitively high processing load and lead to increase inter symbol interference. | 2009-05-28 |
20090135787 | MOBILE COMMUNICATION METHOD, MOBILE STATION DEVICE, BASE STATION DEVICE, AND MOBILE COMMUNICATION SYSTEM - A mobile station device of the present invention includes: a request-signal generating unit that sets a plurality of channel quality indications to be included in a report according to a given pattern to request gap generation for suspending communication for a handover and monitoring another base station device; a gap-generation-request-signal transmitting unit that transmits the report of the channel quality indications having the given pattern to the base station device; a control-signal receiving unit that receives, from the base station device, a control signal indicative of suspension or resumption of the report during a period in which the report is transmitted; and a transmission control unit that controls the gap generation according to the control signal. | 2009-05-28 |
20090135788 | ORTHOGONAL VARIABLE SPREADING FACTOR (OVSF) CODE ASSIGNMENT - The invention includes a system and methods for orthogonal variable spreading factor (OVSF) code assignment, de-allocation and code tree pruning. The invention also includes OVSF code identification and storage schemes. Embodiments are provided for code tree pruning, code assignment and de-allocation. These embodiments apply to both slotted and non-slotted code division multiple access systems. | 2009-05-28 |
20090135789 | Channel Estimation - To allocate a VSAT to a MODCOD in a DVB-S2 ACM system, the HUB periodically transmits pilot frames of alternating MODCODs, which is identified by the VSAT. An FPGA at a VSAT site maintains telemetry of good and bad frames. A processor polls this telemetry to determine the optimal MODCOD to be allocated to the VSAT. | 2009-05-28 |
20090135790 | INTERFACE MANAGEMENT IN WIRELESS COMMUNICATION SYSTEM USING HYBRID TIME REUSE - Interference that occurs during wireless communication may be managed by hybrid time reuse. A method, apparatus amend medium of communication determines one or more time reuse patterns of respective one or more unplanned access points. A second time reuse pattern that is less interfering with the one or more time reuse patterns is selected. Signals are transmitted according to the second time reuse pattern from a second unplanned access point to an associated access terminal. | 2009-05-28 |
20090135791 | BASE STATION AND COMMUNICATION SYSTEM - A base station includes: a first reception timing detecting unit configured to detect a reception timing of a packet received from a first mobile station of multiple mobile stations which is situated in a first sector; a second reception timing detecting unit configured to detect a reception timing of a packet received from a second mobile station of the multiple mobile stations which is situated in a second sector; a transmission timing determining unit configured to determine transmission timings of signals transmitted from the first mobile station and the second mobile station based on the reception timings detected by the first reception timing detecting unit and the second reception timing detecting unit; a control information generating unit configured to generate transmission timing control information for the first mobile station and the second mobile station based on the transmission timings; and a radio resource allocating unit configured to allocate orthogonal radio resources to the first mobile station and the second mobile station. | 2009-05-28 |
20090135792 | Method and System for Wireless Local Area Network (WLAN) Phase Shifter Training - Aspects of a method and system for wireless local area network (WLAN) phase shifter training are presented. Aspect of the system may enable a receiving station, at which is located a plurality of receiving antennas, to estimate the relative phase at which each of the receiving antennas receives signals from a transmitting station. This process may be referred to as phase shifter training. After determining the relative phase for each of the receiving antennas, the receiving station may process received signals by phase shifting the signals received via each of the receiving antennas in accordance with the relative phase shifts determined during the phase shifter training process. Signals received via a selected one of the receiving antennas may be unshifted. The processed signals may be combined to generate a diversity reception signal. | 2009-05-28 |
20090135793 | METHOD AND APPARATUS FOR MANAGING AN IP ADDRESS SPACE OF AN ADDRESS SERVER IN A MOBILITY NETWORK - The invention manages an IP address space in a mobility network, including partitioning of the IP address space, assignment of IP addresses from the IP address space, and/or use of hysteresis to control reassignment of IP addresses from the IP address space. The IP address assignment is performed using one or more residual time statistics from a residual time profile maintained for the mobile node requesting assignment of an IP address. A residual time profile of a mobile node includes one or more residual time statistics associated with the mobile node. The residual time statistics for a mobile node are determined using a residual time associated with each IP address assigned to the mobile node. The IP address space partitioning is performed using residual time statistics maintained for mobile nodes of the network. The reassignment of IP addresses from the IP address space is controlled using hysteresis. | 2009-05-28 |
20090135794 | WIRELESS COMMUNICATION TERMINAL AND ROAMING METHOD - A wireless communication terminal roaming from a current access point (AP) to a destination AP within a plurality of APs includes various functional modules. The wireless communication terminal detects a current service quality parameter of each of the plurality of APs, a roaming frequency, and a packet retransmission rate of the wireless communication terminal in a predetermined detection period. Furthermore, the wireless communication terminal calculates a value of an RQI according to the current service quality parameter of each of the plurality of APs, the roaming frequency, and the packet retransmission rate of the wireless communication terminal, and regulates a roaming threshold of the current AP according to the value of the RQI and determines the destination AP that has satisfied a roaming condition corresponding to the value of the RQI. | 2009-05-28 |
20090135795 | FEMTOCELL ARCHITECTURE IN SUPPORT OF VOICE AND DATA COMMUNICATIONS - Methods and systems for providing voice and date services in a femtocell wireless network. The proposed approach integrates IWLAN architecture into femtocell architecture by introducing a gateway to serve both IWLAN and femtocell users. The proposed approach handles the voice and data in a different way so that it enhances the data handling efficiency while re-using existing MSC investment. The proposed approach carries the data traffic from a femtocell base station to the gateway in native IP packet, instead of encapsulating them in 3G data, thus enhancing the efficiency and performance for the data traffic. The data traffic can then be sent to GGSN or directly to packet data network. The approach tunnels voice traffic to MSC through the gateway as in conventional Iu-CS approach. | 2009-05-28 |
20090135796 | INTERFACE MANAGEMENT IN A WIRELESS COMMUNICATION SYSTEM USING SUBFRAME TIME REUSE - Interference that occurs during wireless communication may be managed by subframe time reuse. A method, apparatus amend medium of communication determines interfering subframe gating sequences. The transmission gating in a home access point is adjusted by determining a first gating sequence from a first unplanned access point. A second gating sequence is selected based on the first gating sequence, wherein the first and second gating sequences are non-interfering. Signals are transmitted according to the second gating sequence from a second unplanned access point to an associated access terminal. | 2009-05-28 |
20090135797 | Mobile telecommunications architecture - A mobile telecommunications architecture is disclosed. A downlink mobile telecommunications signaling message is received via a first communication interface associated with a single shared network controller connection to a mobile switching center (MSC) server. The downlink mobile telecommunications signaling message is mapped to one of a plurality of small scale base stations each of which is configured to perform at least some network controller functions. | 2009-05-28 |
20090135798 | Methods And Apparatus For Use In Switching Communication Operations Between A Wireless Wide Area Network And A Wireless Local Area Network - Methods and apparatus for use by a mobile communication device in switching operation for communications from a wireless wide area network (WWAN) to a wireless local area network (WLAN) are disclosed. While providing operation for communications in the WWAN, the mobile device continually maintains visited cell site history information in its memory. The visited cell site history information is indicative of one or more visited cell sites of the WWAN that served the mobile device over a moving time period of its operation. The mobile device continually monitors the visited cell site history information to identify whether it has been contained within a local geographic region over the moving time period. When the mobile device is identified to have been contained within the local geographic region, it is permitted to operate for communications with the WLAN. In response to such permission, the mobile device may enable its WLAN radio transceiver and select the WLAN for communications. Advantageously, switching operation for communications from the WWAN to the WLAN is performed only when appropriate. The WLAN radio transceiver may be enabled only when needed, which reduces power consumption and saves battery life in mobile device. | 2009-05-28 |
20090135799 | WIRELESS COMMUNICATIONS DEVICE INCLUDING PATH SEARCHER WITH COMMON COHERENT CORRELATOR AND RELATED METHODS - A wireless communications device may include a path searcher for detecting signal peak locations in a received signal. The path searcher may include a common coherent correlator for performing a common coherent correlation operation on the received signal, and a plurality of peak detection frequency bin correlators may be arranged in parallel downstream from the common coherent correlator. The wireless communications device may further include a RAKE finger stage for determining symbol values from the received signal based upon the detected signal peak locations. | 2009-05-28 |
20090135800 | WIRELESS COMMUNICATIONS DEVICE INCLUDING RAKE FINGER STAGE PROVIDING FREQUENCY CORRECTION AND RELATED METHODS - A wireless communications device may include a path searcher for detecting signal peak locations in a received spread-spectrum signal, and a RAKE finger stage. The RAKE finger stage may include a plurality of RAKE fingers for determining symbol values from the received spread-spectrum signal based upon the detected peak locations. Each RAKE finger may include at least one de-spreader for de-spreading time-staggered versions of the received spread-spectrum signal and operating at a signal rate of the received spread-spectrum signal, and a frequency corrector downstream from the at least one de-spreader comprising a phase lock loop (PLL) operating at a rate that is less than the signal rate. | 2009-05-28 |
20090135801 | Communication device - The attenuation characteristics of an attenuator largely changes depending on the frequency of an input signal. Accordingly, a difference between the amounts of attenuation of gains of each two attenuators included in a communication device is not constant. In communications using the wireless USB, the difference needs to be in a range of 2 dB±1 dB. Thus, the communication device does not meet the standards of the wireless USB unless the difference between the amounts of attenuation of the attenuators is adjusted. In this regard, provided is a communication device including first and second attenuators that attenuate a signal. The second attenuator is provided with a regulator circuit that adjusts a relation between an amount of attenuation of the signal through the first attenuator and an amount of attenuation of the signal through the second attenuator. | 2009-05-28 |
20090135802 | SCALABLE BANDWIDTH SYSTEM, RADIO BASE STATION APPARATUS, SYNCHRONOUS CHANNEL TRANSMITTING METHOD AND TRANSMISSION METHOD - A scalable bandwidth system wherein even if a terminal does not know the breakdowns of the services in all of the bandwidths, it can perform a correlation processing of synchronous channels (SCH). A base station repetitively transmits a synchronous channel, by unit of the shortest bandwidth (e.g., 1.25 MHz) of a plurality of bandwidths served by the system, over the whole band of the longest bandwidth (e.g., 5 MHz). The terminal calculates the correlation between a synchronous channel sequence signal of the unit of the shortest bandwidth held in advance and the repetitively transmitted synchronous channel, and determines, as a frame timing, a timing at which the maximum correlation value is obtained. | 2009-05-28 |
20090135803 | REFERENCE SIGNAL GENERATION IN A WIRELESS COMMUNICATION SYSTEM - Techniques for generating reference signals in a wireless communication system are described. A set of Q reference signal sequences may be generated based on G pseudo-random sequences and L scrambling sequences, where Q=G·L, G>1 and L>1. The Q reference signal sequences may be used for Q cell identities (IDs), one reference signal sequence for each cell ID. In one design, a Node B may determine first and second indices based on a cell ID of a cell. The Node B may generate a pseudo-random sequence based on the first index, generate a scrambling sequence based on the second index, and generate a reference signal sequence based on the pseudo-random sequence and the scrambling sequence. The Node B may then generate a reference signal for the cell based on the reference signal sequence, e.g., by generating an OFDM symbol with the reference signal sequence mapped to a set of subcarriers. | 2009-05-28 |
20090135804 | Method And System For Ordering Sequences For Synchronization Signaling In A Wireless System - Certain embodiments of the invention may be found in a method and system for ordering sequences for synchronization signaling in a wireless system. Various aspects of the invention may enable a user equipment (UE) receiving signals from eUTRAN base stations (NodeBs). The received signals may comprise synchronization sequences transmitted using synchronization signals such as a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The UE may be enabled to determine the received PSS sequence and SSS sequence for downlink synchronization by correlating the received signal with a set of PSS sequences and a set of SSS sequences, respectively. An SSS sequence may be constructed from two length m-sequences from an ordered set of m-sequences. The ordered set of m-sequences may form a Walsh-Hadamard matrix, which enables the UE to use a fast Walsh-Hadamard matrix transform in SSS sequence processing. | 2009-05-28 |
20090135805 | System and method for connection identifier synchronization in a communication system - A method is provided for synchronizing Connection IDentifiers (CIDs) of a first station and a second station in a communication system. The CID synchronization method includes sending, by the first station, a first message for requesting addition of a service flow identified by a CID to the second station; sending, by the second station, a second message which is a response message to the first message, and at the same time, setting a number of a frame where the second message is transmitted as a first start frame number; sending, by the first station, a third message for acknowledging receipt of the second message to the second station, and at the same time, setting a number of a frame where the third message is transmitted as a second start frame number; performing, by each of the first station and the second station, a modulo operation on a frame having the first or second start frame number and its succeeding frames using a positive integer for each frame, and detecting a number of a frame where a result value of the modulo operation becomes zero (0); and simultaneously updating CID lists of the first station and the second station at a frame having the detected frame number with regard to a CID of the added service flow. | 2009-05-28 |
20090135806 | ENABLING AD-HOC DATA COMMUNICATION OVER ESTABLISHED MOBILE VOICE COMMUNICATIONS - In one embodiment, a first PC may receive a trigger to establish a data communication session with a second PC over an established voice call between first and second phones over a WAN. In response, the first PC may discover the first phone as an authorized personal area network (PAN) device, and may establish a first PAN communication session between the first PC and the first phone. A request may then be transmitted to the second phone over the established voice call to establish the data communication session between the first and second PCs, and in response, the second phone may discover the second PC as an authorized PAN device from the second phone. A second PAN communication session may thus be established between the second phone and the second PC, and data may be exchanged between the PCs using the PAN communication sessions and the established voice call. | 2009-05-28 |
20090135807 | PERSISTENT SCHEDULING OF HARQ RETRANSMISSIONS - Briefly, in accordance with one or more embodiments, HARQ retransmissions may be persistently scheduled so as to efficiently allocate network without requiring the HARQ retransmissions to be scheduled for every frame or nearly every frame. Furthermore, grouping of users may occur using a bitmap for the HARQ retransmissions using the same bitmap as used for scheduling of the original packet transmission or using a separate bitmap for the HARQ retransmissions. In the event one or more scheduled HARQ retransmissions are not needed, the base station is capable of reallocating the previously scheduled resources. | 2009-05-28 |
20090135808 | LINE TERMINATION ARRANGEMENT WITH COMBINED BROADBAND AND NARROWBAND SERVICES - A combined line termination arrangement ( | 2009-05-28 |
20090135809 | METHOD AND APPARATUS FOR ESTABLISHING A VOICE BEARER IN A TELECOMMUNICATIONS SYSTEM - A method for establishing a voice bearer in a telecommunications system in which packetized voice traffic is carried over a user plane, includes negotiating at least one of header compression and voice multiplexing options for a call and, in the negotiation process, using information about the options that is not sent over the user plane during transmission of voice traffic over the user plane. The information may be sent by signaling out of band and not via the user plane, thus not impacting on transmission of voices data. In another method, option information from a previous call or calls between the same IP addresses is used to set up the options for a new call without any additional signaling. | 2009-05-28 |
20090135810 | Device to terminate a modem relay channel directly to an IP network - A modem data aggregating gateway that supports modem relay functionality for permitting reliable switching of modem traffic between a VoIP network and a data packet switch Internet Protocol (IP) network, s.a. the Internet. The modem relay aggregator may receive modem data encapsulated as Voice over IP (VoIP) data packets in accordance with a Simple Packet Relay Transport (SPRT) mechanism. The packet data may be error corrected and/or decompressed before being repackaged for forwarding to the ultimate destination. In the event that the destination is itself an IP device, the modem relay aggregator may forward the packets directly over the IP network. As a result, if the destination of a modem call is an IP device (such as a Web site or other Internet-enabled device) the technique eliminates two points from a processing path in which digital signal processing (DSPs) would otherwise have to perform modem protocol processing. Otherwise, minimal modem reformatting can be performed at the aggregation point. | 2009-05-28 |
20090135811 | HYBRID PACKET-SWITCHED AND CIRCUIT-SWITCHED TELEPHONY SYSTEM - A hybrid telephony system with packet switching as well as circuit switching optimizes utilization of transport networks, and is accessible from any conventional telephone set. A call originating from a circuit-switched network is passed through a gateway computer to a backbone packet-switched network, and then through a second gateway computer to a second circuit-switched network where it terminates. The voice of both the originating party and the terminating party is converted to data packets by the near-end gateway computer and then converted back to voice by the far-end gateway computer. In an alternative scenario, the originating party uses a computer on the packet-switched network, which replaces the originating circuit-switched network and the originating computer. Powered by CPUs, DSPs, ASICs disks, telephony interfaces, and packet network interfaces, the gateway computers may have media conversion modules, speech processing modules and routing resolution modules, and are capable of translating telephony call signaling as well as voice between circuit-switched and packet-switched networks. Optionally, the gateway computers may also have analog trunking modules, MF and DTMF digit modules and special services modules, in order to support analog circuit-switched networks and secure telephone calls. | 2009-05-28 |
20090135812 | CALL TRANSFER METHOD AND COMMUNICATION SYSTEM - The present disclosure discloses a call transfer method and a communication system, and the call transfer method includes: transferring, by a source CTI platform, a call of a user terminal processed by a source traffic resource device to a target traffic resource device upon a call hang and transfer request of the source traffic resource device, and setting the source traffic resource device in a suspended state according to a call processing response message provided from a target CTI platform; and receiving a call release notification message sent from the target CTI platform after the target traffic resource device processes the call, setting the source traffic resource device in an active state according to the call release notification message, and transferring the call of the user terminal back to the source traffic resource device. Embodiments of the disclosure may reduce a coupling degree between the platform and the service side in the call transfer service and hence improve reliability of the system. | 2009-05-28 |
20090135813 | TRANSMITTING MESSAGES IN TELECOMMUNICATIONS SYSTEM COMPRISING A PACKET RADIO NETWORK - A method of transmitting messages in a telecommunication system includes a first network offering circuit-switched services, a second network offering packet-switched services, and at least one mobile station supporting the first and the second network. When the need arises to transmit at least one message, a check is made to see if the mobile station is attached to the second network. The message is transmitted to the second network if the mobile station is attached to the second network. The message is transmitted to the first network in case of a failure to transmit the message via the second network. | 2009-05-28 |
20090135814 | Method and device for tapping the payload data of multimedia connections in a packet network - In one aspect, a method for tapping conventional multimedia connections such as video telephony according to Lawful Interception standards in a packet-oriented network is provided. A control, for the duration of a call, replaces the point-specific data of the respective partner end by the point-specific data of the tapping device, thereby guiding the useful data flows via the tapping device, tapping them and optionally adapting them to the interface of the tapping agencies. | 2009-05-28 |
20090135815 | HIERARCHICAL SEGMENTED LABEL SWITCHED PATHS - A network may include a first set of routers at a first level of a multi-protocol label switched tunneling hierarchy and a second set of routers at a second level of the multi-protocol label switched tunneling hierarchy, the second set of routers connected to the first set of routers in a partially meshed topology. The network may also include a hierarchical segmented label switched path. The hierarchical segmented label switched path may include a forwarding adjacency label switched path including a subset of the first set of routers, and a label switched path coupled to the forwarding adjacency label switched path, the label switched path including a subset of the second set of routers. | 2009-05-28 |
20090135816 | METHOD AND APPARATUS FOR ASSIGNING IP ADDRESSES - The invention includes a method and apparatus for assigning an IP address to a mobile node (MN) from an IP address space represented using an address aggregation tree. A method includes receiving a request for an IP address for the MN, identifying each of a plurality of sub-tree gaps in the address aggregation tree, selecting one of the identified sub-tree gaps, and assigning an available IP address from the selected sub-tree gap to the MN. The sub-tree gaps of the address aggregation tree are identified using a recursive algorithm that traverses the address aggregation tree. The selected one of the sub-tree gaps is selected based on respective sizes of the identified sub-tree gaps. The assigned IP address is communicated to the MN for use by the MN in accessing various services. | 2009-05-28 |
20090135817 | METHOD FOR COMPUTING THE ENTROPIC VALUE OF A DYNAMICAL MEMORY SYSTEM - Methods, devices, and systems are provided for optimizing the dissemination of information in an access control system. More specifically, there are provided various mechanisms to increase the efficiency with which system updates and other types of information are spread throughout an access control system having at least one non-networked reader. | 2009-05-28 |
20090135818 | METHOD AND DEVICE FOR FORMING, TRANSFERRING AND RECEIVING TRANSPORT PACKETS ENCAPSULATING DATA REPRESENTATIVE OF AN IMAGE SEQUENCE - The present invention relates to a method of forming transport packets for transmitting, from a server device to at least two client devices, data representative of a coded image sequence, the coded data being encapsulated in transport packets comprising a first portion composed of a plurality of fields and a second portion. The method comprises the steps of obtaining (E | 2009-05-28 |
20090135819 | MULTICAST ENABLED WEB-BASED APPLICATION DATA DISTRIBUTION - A method, information processing unit, and computer readable storage medium, are provided for distributing data packets efficiently across a packet-based data network of information processing units and intermediate nodes. The method with an information processing unit includes receiving data and identification of destinations on a packet-based data network, the data being associated with the identification of, and destined for reception by, each of the destinations on the packet-based data network. The method sends a single copy of the data across the packet-based data network via intermediate nodes to the destinations using a reliable multicast technique, the single copy of the data being sent contained in one or more multi-cast data packets. Each multi-cast data packet includes a multi-cast indicator and one or more unicast addresses associated with one or more of the destinations on the packet-based data network. | 2009-05-28 |
20090135820 | MULTICAST PATH BUILDING METHOD AND DEVICE - An RPF Neighbor having the least traffic flow is estimated and a multicast distribution path via the RPF Neighbor is selected so as to split the load between routers constituting the Equal-cost Multipath and lines. | 2009-05-28 |
20090135821 | COMMUNICATION CONTROL UNIT AND COMMUNICATION CONTROL METHOD APPLIED FOR MULTI-CAST-SUPPORTING LAN - A multicast processing section constructs, when it is determined that a received packet is a packet on a multicast packet and multicast group management protocol, a table showing a correlation between a host device and a multicast group in a port number-multicast physical address correlation storing section as well as in a multicast router-connected port storing section according to the received packet, and controls to transfer a packet for each multicast group between a multicast router and host devices according to the table. | 2009-05-28 |
20090135822 | METHOD AND APPARATUS FOR CONTROLLING PACKET FORWARDING - A technology is disclosed for reducing the number of encapsulations required when MAP forwards a packet to a mobile node which is layered within mobile networks, with mobile networks nested and multiple mobile routers chained behind MAP (Mobility Anchor Point). MAP | 2009-05-28 |
20090135823 | ROUTING SYSTEM, CONTROL ELEMENT, ROUTING METHOD AND FORMING METHOD FOR EXCHANGING TABLE AND FORWARDING TABLE - In a routing method, a control element firstly forms a forwarding table and an exchanging table according to a routing table. Next, a first forwarding element receives a packet, and then obtains a label from the forwarding table according to a destination address of the packet, and determines to output the packet from the first forwarding element or a second forwarding element according to the label. If the packet is to be outputted from the first forwarding element, it is directly outputted to the destination address of the packet; otherwise the second forwarding element receives the packet and the label. Next, the second forwarding element obtains a next forwarding path from the exchanging table according to the label to forward the packet. The control element and the first and second forwarding elements constitute a routing system. | 2009-05-28 |
20090135824 | Route Selection in Wireless Networks - A system and method for discovering a route between a source node and a destination node in a wireless network including setting an intermediate reply flag of a route request message by the source node, flooding the wireless network with the route request message and responding to the route request message with route reply message by a first intermediate node having a valid route to the destination node, are described. Also described are a system and method for discovering a best route in which case the route reply message becomes a first route reply message. The system and method for discovering a best route includes selecting by the destination on the best route between itself and the source node based on cumulative metrics received in route request messages received by the destination node, creating a further route reply message and unicasting the further route reply message to the source node. | 2009-05-28 |
20090135825 | Providing an Independent Compression Server Within a Network, as Well as a Method, Network Station and HDCP Server - The invention is related with the problem of utilizing data compression in a network of distributed stations. Often header compression is used to improve the bandwidth usage in networks, in particular wireless networks. Header compression could be implemented in access points or routers, but both implementations have serious problems, e.g. due to limited CPU power, lack of scalability, or handover latency. To resolve the problems the invention proposes to use a dedicated data compression server in the network and a new protocol to transparently deploy data compression in the network. | 2009-05-28 |
20090135826 | APPARATUS AND METHOD OF CLASSIFYING PACKETS - The present invention relates to an apparatus and method of classifying packets that can support a quality of service (QoS) in a network system. An apparatus for classifying packets according to an exemplary embodiment of the present invention includes, a first unit that analyzes input data packets, extracts pluralities of specific fields from the data packets using an analyzed result, and outputs the pluralities of specific fields; pluralities of second units that compare data of a first portion of the pluralities of extracted specific fields with data in a table, determine whether items that satisfy a predetermined condition exist in the table, and output hit signals and pointers indicating positions of the items that satisfy the predetermined condition when the items that satisfy the predetermined condition exist in the table; and a third unit that compares data of a second portion of the pluralities of extracted specific fields and key data including the pointers input from the pluralities of second units and rule data in a is rule table and outputs classes corresponding to the items when the key data and the rule data are matched. | 2009-05-28 |
20090135827 | SYNCHRONIZING SEQUENCE NUMBERS AMONG PEERS IN A NETWORK - A method and system are disclosed. In one embodiment the method includes a first device sending a stream of packets in a sequence across a network to a second device. In the sequence of packets there are a number of data packets and one or more synchronization packets. The synchronization packets are interspersed throughout the data packets. The method also includes the second device being capable of dropping any of the received data packets in the sequence arriving more than a first delta of time threshold value after the arrival of the most recent synchronization packet. | 2009-05-28 |
20090135828 | INTERNET PROTOCOL TELEVISION (IPTV) BROADCASTING SYSTEM WITH REDUCED DISPLAY DELAY DUE TO CHANNEL CHANGING, AND METHOD OF GENERATING AND USING ACCELERATION STREAM - An Internet Protocol Television (IPTV) broadcasting system is provided. The IPTV broadcasting system includes: An Internet Protocol Television (IPTV) broadcasting system for reducing a display delay when a channel is changed, including: a stream transmitting apparatus receiving a broadcast channel stream, generating an acceleration stream from the broadcast channel stream, and transmitting the broadcast channel stream and the acceleration stream; and a set-top box receiving the broadcast channel stream and the acceleration stream from the stream transmitting apparatus, and reproducing a decoding stream, according to a type of a received frame in the broadcast channel stream and the acceleration stream. Therefore, it is possible to reduce a display delay when a channel is changed. | 2009-05-28 |
20090135829 | ACCESS NETWORK SYSTEM, ACCESS EQUIPMENT, ARP PROXY METHOD AND AN IP BRIDGING FORWARDING METHOD - An access network system, an address resolution protocol proxy method and an IP bridging forwarding method for the access network system are disclosed. The access network system comprises: one or more access network edge nodes that connect to one or more access nodes; one or more access nodes that connect to user terminals to the access network, and a reference point that is introduced between two adjacent access nodes for the access nodes interconnection. With this system, the multi-cast or broadcast flow in the network can be reduced and the communication delay and path can also be decreased. Therefore the communication bottleneck brought by BRAS/BNG can be avoided. | 2009-05-28 |
20090135830 | ATM CONNECTION BAND CONTROL METHOD AND CONTROL SYSTEM - An asynchronous transfer mode connection band control system in a system for transmitting and receiving an asynchronous transfer mode cell utilizing an asynchronous transfer mode network, has data storage means for storing a connection band of a preferential switched virtual connection having high preference in the asynchronous transfer mode network being stored preliminarily as a band acquiring data and storing acquired band data of a switched virtual connection currently established connection, and connection band control means for performing control of connection band on the basis of a total number of bands derived by a sum of the band acquiring data and the acquired band data stored in the data storage means. | 2009-05-28 |
20090135831 | Apparatus and Program Product for Obtaining Multiple Port Addresses by a Fibre Channel from a Network Fabric - Apparatus and program product for assigning or confirming multiple address identifications to a single channel adapter. A server contains multiple partitions connected to a single channel adapter which is used to send data and commands to a fabric. A request is sent to the fabric on behalf of each of the partitions, and the fabric assigns or confirms and returns to the adapter, an address identification associated to each partition on whose behalf the request was sent. The assigned or confirmed address is used to communicate between controllers connected to the fabric and the associated partition through the same channel adapter. | 2009-05-28 |
20090135832 | PIPELINE SCHEDULER WITH FAIRNESS AND MINIMUM BANDWIDTH GUARANTEE - A pipeline scheduler provides a minimum bandwidth guarantee by transporting cells from an input port to an output port in a two-phased approach. Cells that conform to a minimum cell rate (MCR) are selected from queues at the input port and arranged into supercells for transport to the output port, followed by nonconforming cells, to guarantee fairness by using scheduling modules to build the supercells first for conforming cells, and then for nonconforming cells. Reservation vectors are used to permit the same time slot of the next frame to be reserved by a first queue, and the same time slot of the following time frame to be held for reservation by a second queue, to ensure equal time slot access by the first and second queues over successive time frames. | 2009-05-28 |
20090135833 | Ingress node and egress node with improved packet transfer rate on multi-protocol label switching (MPLS) network, and method of improving packet transfer rate in MPLS network system - Provided are an ingress node and an egress node on a Multi-Protocol Label Switching (MPLS) network, with an improved packet transfer rate, and a packet transfer rate improving method in a MPLS network system. By assigning a MPLS label to a destination MAC address of a packet in order to guarantee Quality of Service (QoS), it is possible to distributively transmit packets through a variety of paths on a MPLS network and thus improve a packet transfer rate. | 2009-05-28 |
20090135834 | Technique For Identifying RTP Based Traffic In Core Routing Switches - A technique for identifying RTP based traffic in routers and switches is disclosed. In one embodiment, a method of identifying RTP based traffic in routers and switches, includes receiving IP packets including a UDP header and a second header located substantially after the UDP header, generating statistical parameters by inspecting predetermined sequence of bits at predetermined offsets in the second header of each received IP packet for a predetermined number of IP packets, and determining whether the IP packet is an RTP based IP packet by comparing the generated statistical parameters to predetermined characteristics. The method also includes pre-filtering the received IP packets to allow only the IP packets comprising the UDP header and the second header to reach an RTP detection engine. | 2009-05-28 |
20090135835 | ASYMMETRIC PACKET SWITCH AND A METHOD OF USE - The present invention relates to a packet switch and a packet switching method. An example embodiment of the present invention comprises at least three network ports, at least one instrument port, a mux-switch, a packet switch fabric, and an address table. The embodiment updates the address table to include the source address of each ingress packet of each network port and associate the source address with that network port. The mux-switch routes the ingress packet traffic of each network port according to the identity of the network port so that at least a copy of the packet traffic of one of the network ports is routed to an instrument port. The packet switch fabric routes the packets from the instrument ports to the network ports according the destination address of the packet and the identity of the network port that is associated with the destination address as recorded in the address table. | 2009-05-28 |
20090135836 | COLLECTOR DEVICE AND SYSTEM UTILIZING STANDARDIZED UTILITY METERING PROTOCOL - A device-agnostic collector is capable of accepting information pushed from a node for aggregation and subsequent transmission to the head end server. As a receiver of pushed information, the device-agnostic collector does not require information about the type of meter at the node or the type of data structures transmitted by the node. | 2009-05-28 |
20090135837 | METHOD OF COMMUNICATING PACKET MULTIMEDIA TO RESTRICTED ENDPOINTS - A method, performed in a network element, for communicating packet multimedia data between a first endpoint and a second endpoint, the method comprising the machine-implemented steps of receiving an outbound multimedia data packet; determining if the outbound multimedia data packet originated from a first endpoint that is logically behind a security device; determining and storing information identifying a logical pinhole in the security device, wherein the logical pinhole is associated with expected inbound multimedia data packets directed to the first endpoint; performing an action that keeps the logical pinhole open during all of a communication session between the first endpoint and the second endpoint; and forwarding inbound multimedia data packets directed from the second endpoint to the first endpoint via the logical pinhole. | 2009-05-28 |
20090135838 | SYSTEM AND METHOD FOR SUPPORTING LINK AGGREGATION AND OTHER LAYER-2 PROTOCOLS PRIMARILY OVER UNIDIRECTIONAL LINKS - Traffic through a bridge or other network device is directed in a manner that enables link aggregation and other layer-2 protocols to operate fully, even though the device may have as few as a single bidirectional link, with the remaining links being unidirectional. The protocol stack logic of the network device includes shim logic that receives traffic and processes it to determine to where it is to be directed. | 2009-05-28 |
20090135839 | PACKET-SWITCHED NETWORK-TO-NETWORK INTERCONNECTION INTERFACE - In one of many possible embodiments, an exemplary method includes establishing a secure packet-switched connection for exchanging predefined signaling messages between network elements associated with distinct network domains, determining and implementing at least one media exchange technology for transporting media between the network domains, exchanging signaling and media border processing information between the network domains, exchanging access device information between the network domains, determining and implementing at least one service policy associated with the network domains, and providing a packet-switched network-to-network interconnection interface configured for peering at least one session between the network domains based on the predefined signaling messages, media exchange technology, signaling media border processing information, access device information, and service policy. | 2009-05-28 |
20090135840 | METHOD FOR ADJUSTING MSS OR PACKETS SENT TO A BRIDGE DEVICE POSITIONED BETWEEN VIRTUAL AND PHYSICAL LANS - A method and apparatus are provided for use with a SEA or other bridge device, which is positioned between virtual and physical LANS and is adapted to monitor connection setup packets. If the SEA detects such a packet, it determines whether it can accommodate the MSS value listed in the packet. In one embodiment, a method is provided for implementation by a bridge device positioned to transfer data packets between a specified LPAR system arid a specified host. The method comprises the step of detecting a packet that is transmitted to the bridge device, in order to set up a connection between the LPAR system and the host. The method further comprises determining whether the detected packet indicates an initial MSS value for the connection that is greater than a prespecified MSS value. Upon determining that the detected packet indicates an initial MSS value that exceeds the prespecified MSS value, the packet is altered to establish the prespecified MSS value as the MSS value for the connection. | 2009-05-28 |
20090135841 | SYSTEM AND METHOD FOR RETRIEVING COMPUTED PATHS FROM A PATH COMPUTATION ELEMENT USING ENCRYPTED OBJECTS - In one embodiment, a path computation client (PCC) generates a path computation request and transmits the path computation request to a path computation element (PCE). The PCC receives from the PCE a response including path segments defining a path, at least one of the path segments being an encrypted path segment that has been encrypted according to an encryption algorithm associated with a remote domain. The PCC then generates a path reservation message that includes the encrypted path segment. This is done without decrypting the encrypted path segment at the PCC. The PCC transmits the path reservation message to one or more nodes along the path, which may be capable of decrypting the encrypted path segment. | 2009-05-28 |
20090135842 | METHOD AND SYSTEM FOR CONNECTING A MEDIA STREAM, AND METHOD AND SYSTEM FOR DETECTING A CONNECTIVITY - This invention discloses a method for connecting a media stream, which includes: transmitting, by a media gateway in a private network, a connecting message to an external network device through a network address translation device; the connecting message is used for generating a new address mapping, which is used for a subsequent media stream to pass through the network address translation device, in the network address translation device when there is no address mapping available in the network address translation device; and the connecting message is used for keeping alive an address mapping when the address mapping is already available in the network address translation device. The invention further discloses a system for connecting a media stream, two methods for detecting connectivity, and a system for detecting connectivity. | 2009-05-28 |
20090135843 | SYSTEM AND METHOD FOR OPERATING MESH DEVICES IN MULTI-TREE OVERLAPPING MESH NETWORKS - Methods, systems, and devices described herein can allow a mesh device to participate in multiple mesh networks. A plurality of mesh devices can each associate with a mesh network, each mesh network managed by an access point. Mesh devices exchange neighbor information with neighboring mesh devices, including information of mesh devices associated with a different mesh network. Communication paths can include mesh devices of multiple mesh networks. This provides path diversity among mesh devices and improves bandwidth and reliability. In addition, this provides access diversity in case of mesh network or mesh gate failures. | 2009-05-28 |
20090135844 | TRANSMIT-SIDE SCALER AND METHOD FOR PROCESSING OUTGOING INFORMATION PACKETS USING THREAD-BASED QUEUES - Embodiments of a transmit-side scaler and method for processing outgoing information packets using thread-based queues are generally described herein. Other embodiments may be described and claimed. In some embodiments, a process ID stored in a token area may be compared with a process ID of an application that generated an outgoing information packet to obtain a transmit queue. The token area may be updated with a process ID stored in an active threads table when the process ID stored in the token area does not match the process ID of the application. | 2009-05-28 |
20090135845 | CONNECTION MANAGEMENT FOR A VEHICLE TELEMATICS UNIT - A connection management system and method manages connections between a vehicle telematics unit and a call center. A connection is established between the vehicle telematics unit and the call center over a wireless network. A first service is provided to the vehicle telematics unit during which a request for a second service is recognized for the vehicle telematics unit. A connection between the vehicle telematics unit and the call center is provided in response to the request for the second service after completion of the first service. This can include maintaining the established connection to carry out the second service or initiating a new connection after the first one is terminated. | 2009-05-28 |
20090135846 | METHOD AND SYSTEM FOR SELECTING FROM A PLURALITY OF CONFIGURATION PROFILE RECORDS FOR CHANNEL BONDING OPERATION - In DOCSIS 3.0 a greater level of configuration is possible for cable modems than was available in earlier versions. The CMTS potentially receives many possible configurations from a new CM. The standard does not indicate how the CMTS should configure a CM that can support more than one possible configuration. A CMTS' operator specifies preferences for certain channel configurations. The CMTS evaluates the configuration profiles received from a booting CM and determines the best profile to attempt to accommodate based on the specified preferences. The CMTS determines how to instruct the CM to configure itself based on the available channel resources than can accommodate the selected configuration profile. | 2009-05-28 |
20090135847 | Method and apparatus for controlling transmissions in communication systems - In a bandwidth allocation protocol for a mobile communications network, mobile terminals indicate the total quantity of data awaiting transmission, the maximum delay time of the most urgent portion of the data, and the maximum delay time of the least urgent portion. If a collision occurs between transmission by two mobiles, the mobiles wait for an interval controlled by the network before attempting another contention-based access transmission. The network periodically varies the contention-based access capacity available according to the observed usage level and/or collision rate in the previously allocated contention-based access capacity. The network analyses the forward traffic to individual mobiles and predicts likely return bandwidth requirements. The network stores associations between forward and return frequency channels, so that when a mobile receiving a forward frequency channel request return capacity, the network preferentially assigns return bandwidth to the mobile in one or more of the associated return channels. | 2009-05-28 |
20090135848 | System and Method for Repeater in a Power Line Network - System and method for repeater in a power line network. According to an embodiment, the present invention provides a method for power line communication network. The method includes providing a virtual local area network (VLAN), which VLAN includes at least a repeater, a client, and a gateway. The VLAN is associated with a network encryption key. The repeater is associated with a first identification. The client is associated with a second identification. The gateway is associated with a third identification. The first identification and the third identification are a service identification type. The second identification is a client identification type. The method also includes providing a power line network that is configured to transmit data through OFDM signaling. The method includes sending a first data packet in first format from the client through the power line network. The method additionally includes receiving the first data packet by the repeater through the power line network at through a first network interface. | 2009-05-28 |
20090135849 | RTP Payload Format - A data stream is encrypted to form encryption units that are packetized into RTP packets. Each RTP packet includes an RTP packet header, one or more payloads of a common data stream, and a RTP payload format header for each payload and including, for the corresponding encryption units, a boundary for the payload. The payload can be one or more of the encryption units or a fragment of one of the encryption units. The encryption units are reassembled the using the payloads in the RTP packets and the respective boundary in the respective RTP payload format header. The reassembled of encryption units are decrypted for rendering. Each RTP payload format header can have attributes for the corresponding payload that can be used to render the payload. The RTP packets can be sent server-to-client or peer-to-peer. | 2009-05-28 |
20090135850 | METHOD AND APPARATUS OF TRANSMITTING RESOURCE-REQUEST FOR EFFICIENTLY USING SERVICE IDENTIFIER (SID) RESOURCE IN CABLE MODEM SYSTEM SUPPORTING UPSTREAM CHANNEL-BONDING - A method and apparatus of transmitting a resource-request for efficiently using a Service Identifier (SID) resource in a Cable Modem (CM) system supporting upstream channel-bonding relates a method of transmitting an upstream packet in the CM system for performing transmission using a plurality of upstream channels. | 2009-05-28 |
20090135851 | TRANSPORT LAYER AND MODEL FOR AN ADVANCED METERING INFRASTRUCTURE (AMI) NETWORK - Mesh networks, network devices, and computer program products for implementing a transport layer. The transport layer is operable to provide connection oriented transport layer services to at least one of an application layer, a presentation layer, and a session layer. The transport layer header flags essentially consist of: SYN, ACK, PSH, and RST. | 2009-05-28 |
20090135852 | Facilitating intelligent marking and discarding of MPEG video packets in IP packet stream - A computer-implemented method comprises a plurality of operations. An operation is performed for creating an IP packet containing MPEG (Moving Picture Experts Group) packets therein and having a header including a value computed using a respective bit value of each one of the MPEG packets. Thereafter, an operation is performed for analyzing the computed value to determine an importance of the MPED packets relative to decoded video quality of a video stream including the MPEG packets. | 2009-05-28 |
20090135853 | METHOD AND SYSTEM FOR SHORTENING THE LENGTH OF TIME GAPS BETWEEN DATA UNITS IN A DATA SWITCHING NETWORK - A method for shortening the length of time gaps between data units in a data switching network; the method comprising: arranging a group of K data units received consecutively at an input of a first device in K time units, where K is a positive integer; sending the arranged K data units to the inputs of M devices, where M is a positive integer; transferring a group of H | 2009-05-28 |
20090135854 | SYSTEM AND METHOD FOR CLOCK SYNCHRONIZATION - A system and a method are provided for clock synchronization. The method includes receiving a new transmitter timestamp based upon a transmitter clock, determining a new transmitter timestamp delta between the new transmitter timestamp and a previous transmitter timestamp, determining a new receiver timestamp delta between a new receiver timestamp and a previous receiver timestamp, comparing the new receiver timestamp delta to the new transmitter timestamp delta, and adjusting a receiver clock to minimize a compared difference between the new receiver timestamp delta and the new transmitter timestamp delta. The new receiver timestamp is determined upon reception of the new transmitter timestamp. The previous receiver timestamp is determined upon reception of the previous transmitter timestamp. | 2009-05-28 |
20090135855 | Apparatus for automatically synchronizing setting information of wireless device - Provided is a portable device having an automatic setting information synchronizing function for a two-way radio communication. The portable device includes a radio communication unit for transmitting/receiving data to/from an external fixing device via a two-way radio communication, an input/output unit for providing an input/output interface, a synchronizing unit for receiving setting information from the external fixing device, and a central processing unit for controlling the radio communication unit, to thereby receive the setting information through the synchronizing unit upon connection with the external fixing device and to transmit/receive various data inputted/outputted through the input/output unit based on the received setting information via the two-way radio communication upon release of connection with the external fixing device. | 2009-05-28 |
20090135856 | MULTIMEDIA APPARATUS AND SYNCHRONIZATION METHOD THEREOF - A multimedia apparatus and a synchronization method thereof are provided. The multimedia apparatus includes a video output unit which outputs a video, and a control unit which transmits an audio signal to the external device through the communication module and operates the video output unit to display a video corresponding to the audio signal by delaying the video based on delay information received from the external device through the communication module. | 2009-05-28 |
20090135857 | FREQUENCY-TUNABLE TERAHERTZ LIGHT SOURCE DEVICE - Provided is a frequency-tunable terahertz light source device. The frequency-tunable terahertz light source device satisfies a Littrow diffraction condition at a wavelength and simultaneously satisfies a Littman-Metcalf diffraction condition at another wavelength using a double diffraction grating having two grating periods. Thus, oscillations simultaneously occur at the two different wavelengths, such that a terahertz wave can be stably generated by beating of the two oscillation wavelengths. In addition, the frequency-tunable terahertz light source device can readily change a frequency up to several terahertz and can be fabricated in a small size. | 2009-05-28 |
20090135858 | LASER OSCILLATION APPARATUS AND CONTROLLING METHOD THEREOF - An aspect of the present invention provides a laser oscillation apparatus in which a control circuit can be simplified to variably control a Q switch pulse width with low cost and a controlling method thereof. A laser oscillation apparatus according to an aspect of the present invention includes a laser oscillator head, a Q switch pulse width setting circuit, an LD current control circuit, an LD driver, an RF amplitude control circuit, and an RF driver. The laser oscillator head includes an internal AOQ-SW element, and an excitation LD. The LD current control circuit and the LD driver controls a current applied to excitation LD such that the current becomes not more than a laser oscillation threshold in synchronization with timing when an optical resonator of the laser oscillator head oscillates one-time or plural-time Q switch pulse. | 2009-05-28 |
20090135859 | Apparatuses and methods for stabilizing carrier-envelope phase of laser pulse by using direct locking method - Apparatus for stabilizing carrier-envelope phase (CEP) of laser pulse generated by mode locked pulsed laser based on direct locking method includes laser oscillator, interferometer, detector and double feedback circuit. The laser oscillator includes the mode locked pulsed laser generating the laser pulse. The interferometer generates laser pulses having first and second frequency components from the laser pulse generated by the mode locked pulsed laser to generate first and second interference signals that substantially correspond to each other in time domain and space domain. The detector receives the first and second interference signals to output third and fourth interference signals by inverting phase of the second interference signal. The double feedback circuit controls the laser oscillator so that the CEP of the laser pulse generated by the mode locked pulsed laser has substantially constant value with respect to time using CEP signal obtained from the third and fourth interference signals. | 2009-05-28 |
20090135860 | Cross Modulation-Based Opto-Electronic Oscillator with Tunable Electro-Optic Optical Whispering Gallery Mode Resonator - Examples and implementations of photonic devices and techniques based on whispering gallery mode resonators formed of electro-optic materials to effectuate cross modulation between whispering gallery modes of different polarizations in the resonators. | 2009-05-28 |
20090135861 | Soi-based tunable laser - A silicon-on-insulator (SOI)-based tunable laser is formed to include the gain medium (such as a semiconductor optical amplifier) disposed within a cavity formed within the SOI substrate. A tunable wavelength reflecting element and associated phase matching element are formed on the surface of the SOI structure, with optical waveguides formed in the surface SOI layer providing the communication between these components. The tunable wavelength element is controlled to adjust the optical wavelength. Separate discrete lensing elements may be disposed in the cavity with the gain medium, providing efficient coupling of the optical signal into the SOI waveguides. Alternatively, the gain medium itself may be formed to include spot converting tapers on its endfaces, the tapers used to provide mode matching into the associated optical waveguides. | 2009-05-28 |
20090135862 | Solid laser apparatus excited by a semiconductor laser - Single mode oscillation at a wavelength of about 1064.4 nm is enabled with no use of an etalon installed in an optical resonator by providing one of two ends of a Nd:YAG element, which acts as one end of the optical resonator, with an HR coating arranged for the wavelength of about 1064.4 nm and determining the thickness along the direction of transmission of light of the Nd:YAG element so that the peak of reflection appears at the wavelength of about 1064.4 nm but not at a wavelength of about 1062.8 nm. | 2009-05-28 |
20090135863 | PROGRAMMABLE LASER DEVICE AND METHOD FOR CONTROLLING THE SAME - A programmable laser trigger device and the method for controlling the same are disclosed. The programmable laser trigger device comprises: an external signal module and a command executing module. The external signal module is capable of interfacing the inputs and outputs of waveform command and signals. The command executing module further comprises: a waveform command memory, for storing the waveform command; a waveform command decoder; a waveform generator; and a buffer memory, acting as a waveform trigger parameter buffer between the waveform command decoder and the waveform generator; wherein the waveform command decoder accesses the waveform command stored in the memory for pre-decoding an executing code while generating a sequence of waveform trigger parameters to be stored in the buffer memory, which provides the waveform generator with the sequence of waveform trigger parameters to be transformed into a pulse-width modulation (PWM) pulse train. With the aforesaid device and method, not only unequal pulse outputs can be generated with good flexibility for matching the needs of various manufacturing processes, but also through the instructions to an external feedback signal from the waveform command, the laser pulses outputted therefrom can be modulated in real time in response to the external feedback signal. | 2009-05-28 |
20090135864 | OPTICAL MODULE - A cut-out portion of a ground conductor is located in a region where a header faces a flexible board from the junction of a signal pin and a signal line and faces the signal line. The size of the cut-out portion is determined so that the impedance of the signal pin is matched to the impedance of the signal line. | 2009-05-28 |
20090135865 | Method for controlling power of an optical disk drive - A method for controlling laser power of an optical disk drive is provided. Firstly, a power-controlling curve of a first loop circuit is formed according to a real test. Next, two test points are selected from the power-controlling curve. Then, the voltage outputted from a second loop circuit is adjusted. After that, whether the generated internal power signal is equal to the internal power signal of the two test points is checked. Afterwards, the voltage outputted from the second loop circuit is recorded. Then, the gain of the two loop circuits under the same change of the internal power signal is calculated. Lastly, a gained power-controlling curve of the first loop circuit is used as a power-controlling curve of the second loop circuit, such that the power-controlling curve is quickly obtained. | 2009-05-28 |
20090135866 | OPTICAL TRANSMISSION CIRCUIT - An optical transmission circuit includes a light emitting device ( | 2009-05-28 |
20090135867 | Temperature compensation method for laser power of an optical disk drive - A temperature compensation method for laser power in an optical disk drive is provided. A predetermined linear-fitting power curve and a temperature-changing slope curve are previously stored in the optical disk drive. Firstly, an output of laser power is controlled according to the predetermined linear-fitting power curve to read/write data. Next, the temperature of the disk drive is detected. Then, whether the temperature has changed is checked. If the temperature has not changed, the method continues to read/write data. If the temperature has changed, the method obtains a relative slope from the slope curve by use of the temperature of the disk drive, displaces the slope of the predetermined linear-fitting power curve with the obtained relative slope to form a new linear-fitting power curve for replacing the predetermined linear-fitting power curve, and controls the output of laser power. | 2009-05-28 |
20090135868 | Optical transmitter able to resume APC operation automatically - An optical transmitter is disclosed that provides a function to resume the APC operation automatically when the failure of the APC operation is due to the thermal runaway of the device in the APC loop. The controller included in the transmitter always monitors the bias current supplied to the LD, and the optical output from the LD. When the bias current exceeds a threshold, the controller decides whether the abnormal is due to the temporary thermal runaway or the fatal failure of the device within the APC loop, and begins to sense the ambient temperature of the LD for appropriate resuming after the thermal runaway is cleared. | 2009-05-28 |
20090135869 | Surface-emitting laser light source using two-dimensional photonic crystal - The present invention intends to provide a surface-emitting laser light source using a two-dimensional photonic crystal in which the efficiency of extracting light in a direction perpendicular to the surface is high. In a laser light source provided with a two-dimensional photonic crystal layer created from a plate-shaped matrix body in which a large number of holes are periodically arranged and an active layer arranged on one side of the two-dimensional photonic crystal layer, the holes are created to be columnar with a predetermined cross-sectional shape such as a circular shape, and the main axis of each of the columnar holes is tilted to a surface of the matrix body. When provided with this two-dimensional photonic crystal layer, the surface-emitting laser source using a two-dimensional photonic crystal has a Q | 2009-05-28 |
20090135870 | Light source based on simultaneous Two-Photon emission - A semiconductor device which produces at least 1 W/m2 two photon emission power per area, when operating at one or more temperatures greater than 20 K. | 2009-05-28 |
20090135871 | Two-Dimensional Photonic Crystal Surface Emitting Laser - An objective of the present invention is to provide a laser capable of producing a radially polarized laser beam with an annular cross section. A laser oscillator | 2009-05-28 |
20090135872 | SURFACE EMITTING LASER, SURFACE EMITTING LASER ARRAY, AND IMAGE FORMING APPARATUS INCLUDING SURFACE EMITTING LASER - A surface emitting laser that oscillates at a wavelength λ includes an upper reflector, a lower reflector, an active layer, and a spacer layer. The spacer layer is a laminated structure that includes a first semiconductor sublayer having a composition of Al | 2009-05-28 |
20090135873 | PROCESS FOR PRODUCING GALLIUM NITRIDE-BASED COMPOUND SEMICONDUCTOR LASER ELEMENT AND GALLIUM NITRIDE-BASED COMPOUND SEMICONDUCTOR LASER ELEMENT - This invention provides a process for producing a gallium nitride-based compound semiconductor laser element, characterized in that a plane inclined at not less than 0.16 degree and not more than 5.0 degrees in terms of absolute value in the direction of <1-100> in (0001) Ga plane, or a plane in which the root mean square of (A | 2009-05-28 |
20090135874 | Electrically pumped surface emitting organic laser device with coupled microcavity - Electrically pumped surface emitting organic laser device having a multi-layer of organic materials disposed between a highly reflective microcavity mirror and a highly reflective mirror to thereby form a coupled microcavity. More specifically, the organic laser device includes a substrate; a bottom mirror over the substrate; a layer of spacer over the bottom mirror; a coupling mirror over the spacer layer; an anode over the coupling mirror; an active layer over the anode; a cathode over the active layer; and a top mirror over the cathode. The combination of the electrode and the mirror leads to low optical absorption and highly reflective electrical contacts at organic-electrode interfaces. Electroluminescent emission efficiency is improved due to the realization of efficient electron-injection and hole-injection. A low loss organic laser device with a coupled microcavity structure is realized that can produce surface emitting laser output under electrical pumping. | 2009-05-28 |
20090135875 | SEMICONDUCTOR LASER AND METHOD FOR FABRICATING THE SAME - A semiconductor laser ( | 2009-05-28 |
20090135876 | SURFACE-EMITTING LASER AND OPTICAL APPARATUS FORMED BY USING SURFACE-EMITTING LASER - A surface-emitting laser has an active layer between a first distributed Bragg reflector and a second distributed Bragg reflector. The first distributed Bragg reflector is formed so as to have a resonant mode and a first longitudinal mode different from the resonant mode included in the reflectivity stop band and a second longitudinal mode different from the resonant mode and the first longitudinal mode excluded from the reflectivity stop band. Oscillation is suppressed in the first longitudinal mode and in the second longitudinal mode. As a result, the surface-emitting laser can oscillate in a single longitudinal mode, suppressing longitudinal mode hopping. | 2009-05-28 |
20090135877 | Lighting Device Equipped with Coaxial Line Laser Diodes and Fabrication Method Thereof - The present invention provides a fabrication method of coaxial line laser diodes and a coaxial lighting optical fiber which disperses and guides uniform emission of light from a coaxial line laser diode. The line coaxial laser diode can be extended at a greater length to generate more spontaneous emission photons which are emitted from an elongated tubular active layer. The active layer has a uniform built-in electric field to distribute uniform current therein to get higher quantum efficiency. The length of the coaxial laser diode can be increased through a VLSED method. A longer laser ingot can be produced and cut to a large number of coaxial laser diodes. This method can reduce the waste of cutting in the wafer process and get larger lighting areas. Both the coaxial line laser diode and the coaxial lighting optical fiber can be coupled to form a high efficiency white-emitting luminescence device. | 2009-05-28 |
20090135878 | SEMICONDUCTOR LIGHT EMITTING DEVICE AND METHOD FOR MANUFACTURING THE SAME - A semiconductor laser chip is joined to an AlN sub-mount in a junction-down manner. The sub-mount is joined to a package. The AlN sub-mount is joined to a stem. The direction perpendicular to the irradiation direction of a laser beam emitted from the semiconductor laser chip is the direction of the width of the sub-mount. The thickness and the width of the AlN sub-mount are determined so that the product of the equivalent stress applied to the center of the surface of the semiconductor laser chip joined to the sub-mount and the stress in the direction of the width of the sub-mount does not exceed 70% of the maximum value of the product obtained by changing the thickness and the width of the AlN sub-mount. | 2009-05-28 |
20090135879 | Conduction-Cooled Accelerated Test Fixture - According to one embodiment of the invention, a testing apparatus for executing highly accelerated life testing on at least one test subject includes at least one structure operable to thermally stress the test subject via conduction and at least one pneumatic hammer operable to input imparting vibrations to the test subject. According to another embodiment of the invention, a method for executing highly accelerated life testing of at least one test subject includes applying a thermal stress to the test subject via conduction at a rate of change of at least 8° C. per minute and imparting vibrations to the test subject at a rate of at least 3 Gs rms. | 2009-05-28 |
20090135880 | TEMPERATURE SENSOR PROBE AND MANUFACTURING METHOD OF THE SAME - To provide a temperature sensor probe that can conduct stable measurements, and the manufacturing method of the same. The temperature sensor probe related to the present invention provides: a fluorescent material that is a mixture of a fluorescent substance and a transparent material; a thermosensitive part having a concave part in which the fluorescent material is arranged; a waveguide route rod that propagates excitation light, which is irradiated on the fluorescent material, and fluorescent light, which is produced by the fluorescent substance; and a protective tube that covers the side surfaces of the waveguide route rod. Then, the fluorescent material is affixed to the tip of the waveguide route rod using the transparent material, and the waveguide route rod bites into the fluorescent material. | 2009-05-28 |
20090135881 | TEMPERATURE SENSOR PROBE - To provide a temperature sensor probe that can take stable measurements, and a manufacturing method thereof. The temperature sensor probe related to the present invention is a temperature sensor probe for measuring temperature using a fluorescent substance that changes fluorescent characteristics depending on temperature. Then, a powdered fluorescent substance, a guide wave route member that propagates excitation light, which is irradiated on the fluorescent substance, and fluorescent light, which is produced by the fluorescent substance, are provided. Further, the particle size of the powdered fluorescent substance is confined to the range of 60 to 100 μm. | 2009-05-28 |