| 15th week of 2009 patent applcation highlights part 23 |
| Patent application number | Title | Published |
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| 20090092115 | APPARATUS AND METHODS FOR CENTRAL CONTROL OF MESH NETWORKS - A method and a wireless communication device that implements a control node for a mesh network. Preferably, the device and method are used in an 802.11 LAN. | 2009-04-09 |
| 20090092116 | Trunking System for CDMA Wireless Communication - Methods and systems for implementing trunking techniques in CDMA systems for handling group calls and push-to-talk services. | 2009-04-09 |
| 20090092117 | METHOD AND DEVICE FOR TRANSFERRING MULTI-STANDARD RADIO SERVICE DATA - The embodiments of the present invention relate to a method and a device for transferring radio service data. The method includes: designing a radio service frame timing mechanism and/or a rule of filling IQ data for a plurality of standards; configuring frame timing mechanisms corresponding to various services according to the designed radio service frame timing mechanism and/or the rule of filling IQ data for a plurality of standards; and transmitting multi-standard radio service data according to the configured frame timing information and/or methods of mapping IQ containers. The device includes a determination unit, a configuring unit and a transfer unit. Thus, uniform transmission of radio IQ data and frame synchronization for different standards may be enabled via a common radio interface between a Radio Equipment Controller (REC) and a Radio Equipment (RE). | 2009-04-09 |
| 20090092118 | INTERLEAVE APPARATUS AND INTERLEAVE METHOD - An interleave apparatus and an interleave method for preventing an increase in the number of retransmissions to improve the throughput. In a wireless communication apparatus having the interleave apparatus, a data holding part ( | 2009-04-09 |
| 20090092119 | BLIND-SLOT RADIO WITH NON-BLIND-SLOT SCANNING MODE - The present invention relates to a transceiver device and a method of controlling a time-division multiplex frame structure with time slots in active mode in which a bearer is established, and time slots in an idle mode in which no bearer is established. Adjacent first and second time slots are set in a scanning mode when the transceiver device is listening for bearer set-up attempts, and the first time slot is switched from the scanning mode to the idle mode if a bearer has been established in the adjacent second time slot and the adjacent second time slot is set into the active mode. Thereby, a non-blind-slot scanning mode is provided which enables maximum number of active full and double slots in systems with blind slot radio. | 2009-04-09 |
| 20090092120 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD AND BASE STATION - A radio communication system includes: a serving cell (for example, cell A functional unit | 2009-04-09 |
| 20090092121 | METHOD FOR BRANCHING DATA IN MOBILE COMMUNICATION TERMINAL - A method for branching data in a mobile communication terminal to perform data communication between a mobile station and a network which have media access control sublayers. In a data sending mode, each of the media access control sublayers of the mobile station and network attaches logical channel types based on traffic characteristic information and a radio bearer status to a media access control header contained in data to be sent. Then, each of the media access control sublayers branches the data to be sent, to transport channels corresponding to the attached logical channel types. In a data receiving mode, each of the media access control sublayers determines logical channels corresponding to logical channel types of a media access control header contained in received data. Then, each of the media access control sublayers branches the received data to the determined logical channels. Each of the media access control sublayers performs mapping and multiplexing/demultiplexing between logical channels and transport channels according to traffic characteristics to branch data. Therefore, it is possible to efficiently provide various multimedia and packet services. | 2009-04-09 |
| 20090092122 | TIME SYNCHRONIZATION OF FEMTOCELL - Time synchronization of an access point base station. The method may include receiving an assignment message from a service provider comprising a plurality of parameters. The plurality of parameters may include an access point base station frequency assignment, a network identifier, an access point base station identifier, a neighbor list, a PN offset, and/or a scrambling code. The access point base station may then synchronize with the macro base station. Synchronizing may include searching for a strongest macro base station in the neighbor list, synchronizing a long code of the access point base station to the macro base station, estimating a propagation delay between the macro base station and the access point base station, and initializing a state of the access point base station PN code using the propagation delay to provide system time synchronization. | 2009-04-09 |
| 20090092123 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD FOR THE SAME - In a communication system in which a plurality of communication apparatuses form a wireless network and communicate with each other, a communication apparatus establishes timing synchronization by transmitting and receiving a beacon to and from other communication apparatuses. The communication apparatus determines whether or not beacon slots for transmitting the beacon are occupied, and if the beacon slots are occupied, connects to another communication apparatus without transmitting the beacon. | 2009-04-09 |
| 20090092124 | NETWORK ROUTING OF ENDPOINTS TO CONTENT BASED ON CONTENT SWARMS - Using location-independent names to identify content, a service for mapping endpoint requests to requested content. Content requested by an endpoint of the network is mapped to a dynamic “swarm” of server, peer, or other endpoints capable of supporting the content download. Content names are mapped to a dynamically generated content swarm, presenting a current set of hosts, which can provide the requested content. Optionally, varying degrees of explicit visibility into routing paths and the performance tradeoffs between those routing paths is supported. Based on a set of class of service parameters for a given request for content, a host can initiate route selection based on class of service parameters, predicated on routing metrics maintained by the network by cooperating endpoints and/or network routers. | 2009-04-09 |
| 20090092125 | METHOD AND APPARATUS FOR PROVIDING CUSTOMER CONTROLLED TRAFFIC REDISTRIBUTION - A method and apparatus for providing customer controlled traffic redistribution are disclosed. For example, the method determines one or more states of one or more Customer Premise Equipments (CPEs) at one or more customer sites periodically, wherein the one or more states are configured by a customer. The method then determines a network action for each of the one or more CPEs in accordance with the one or more states of the one or more CPEs, and routes traffic for the customer in accordance with the network action for each of the one or more CPEs. | 2009-04-09 |
| 20090092126 | METHOD AND SYSTEM FOR RETRIEVING LOG MESSAGES FROM CUSTOMER PREMISE EQUIPMENT - An approach is provided for retrieving a system log. Packets that are destined for a predetermined network address and network port are detected and captured. The packets represent a log file corresponding to a customer premise equipment (CPE) for troubleshooting. A data file is generated to contain the log file, wherein the packets are discarded, by at a firewall, before reaching the predetermined network address and network port. | 2009-04-09 |
| 20090092127 | METHOD FOR ESTABLISHING A COMMUNICATION CONNECTION AND COMMUNICATION DEVICES - A method for establishing a communication connection includes transmitting an identification for identifying a first communication device to the first communication device or a second communication device via a packet-switched first communication connection between the first communication device and the second communication devices and using the identification to establish a circuit-switched second communication connection between the first communication device and the second communication device. | 2009-04-09 |
| 20090092128 | IP TELEPHONE SYSTEM AND COMPUTER READABLE STORAGE MEDIUM - The invention provides an IP telephone terminal. An IP telephone terminal includes an identification data receiving unit, a communicating unit, an IP telephone function controlling unit, a determining unit, a terminal data acquiring unit, and a terminal data acquiring unit. The identification data receiving unit receives, over an Internet, identification data identifying another IP telephone terminal. The communicating unit establishes IP telephone communications with the other IP telephone terminal identified by the identification data via the Internet. The IP telephone function controlling unit controls execution of an IP telephone function used to implement a telephone call with the another IP telephone terminal via the communicating unit. The determining unit determines the identification data received by the identification data receiving unit. The terminal data acquiring unit acquires terminal data associated with the identification data transmitted from the other IP telephone terminal over the Internet, in case the determining unit determines that the terminal data identifying functions that the other IP telephone terminal can control is associated with the identification data received by the identification data receiving unit. The process data transmission controlling unit controls transmission of a process data to the other IP telephone terminal via the IP telephone communications, where the process data is data used in the function identified by the terminal data acquired by the terminal data acquiring unit. | 2009-04-09 |
| 20090092129 | Data Driven Configuration of Call Management Applications - A call manager uses a call management application in conjunction with a live dial database to control routing of calls for managed devices. To generate the live dial database, the call management application accesses configured route patterns and enters these patterns into the live dial database. Upon identifying an expansion indicator in a configured route pattern, the call management application accesses dial plan data that includes multiple route pattern definitions that each define a pattern using one or more sub-strings and, for each sub-string, an associated tag. The call management application then enters patterns defined by the route pattern definitions into the live dial database based on various other criteria established for the configured route pattern having the expansion indicator. | 2009-04-09 |
| 20090092130 | NETWORK SWITCHING SYSTEM WITH ASYNCHRONOUS AND ISOCHRONOUS INTERFACE - To provide a switching system with telephone switching function mainly on the basis of hardware processing by using isochronous channel which is a real time communication channel. The switching system comprises a gateway node connected with ISDN (Integrated Services Digital Network) and PSTN (Public Switched Telephone Network), and one or more extension nodes, and a serial bus such as IEEE 1394 bus. The gateway node transforms data rate of outside line into data rate of extension node, and the other way around, and secure a seamless communication channel. Concretely, the gateway node secures an isochronous channel, according to a request from the extension nodes or the outside line, and executes switching such as transfer or reservation. A resource manager holds a table for managing the gateway node and extension node. | 2009-04-09 |
| 20090092131 | Method and Device for Rejecting Redundantly Retransmitted SIP Messages - A method for rejecting received SIP messages which are redundantly retransmitted used in a Session Initiation Protocol (SIP) application architecture. In one embodiment, the method comprises: forwarding all the messages transmitted from a SIP application server to a SIP terminal, and dropping all the received SIP messages redundantly retransmitted from the SIP terminal to the SIP application server according to the transmission direction of said SIP messages; and correspondingly replying to the dropped SIP messages according to the message type thereof. The present invention also provides a corresponding retransmission rejection device and a network device comprising the same, and further provides a method and device for rapidly rejecting redundantly retransmitted SIP messages in the case where the memory space is limited. The present invention can be applied to a network device such as a SIP stateless proxy at a front end of a SIP application server cluster. | 2009-04-09 |
| 20090092132 | Method and device for translating internet protocol addresses inside a communications network - A private IP address is converted into a public IP address in a communications network without adapting a client software. The conversion of the private IP addresses into the public IP addresses is carried out via a network address translation. The private IP address of each terminal included in a payload of the IP data packet is convertible into a corresponding public IP address and, if necessary, vice-versa. | 2009-04-09 |
| 20090092133 | METHOD, APPARATUS AND SYSTEM FOR NETWORK MOBILITY OF A MOBILE COMMUNICATION DEVICE - A method, device and system for allowing a mobile communication device, such as a DLNA/UPnP device, to continue to communicate with its local network, even when the mobile device leaves or loses contact with the local network. The method includes providing information to a remote access server to create a virtual mobile device in a local network. The virtual device communicates with other devices within the local network as if it is the actual mobile device. The remote access server is configured to route data packets between the virtual device and the mobile device via a second network that does not rely on the mobile nodes connection to the local network. A public IP address of the remote access server provided to the mobile device before the device leaves the local network is used to communicate with the virtual device via an IP-based public network coupled to the local network. | 2009-04-09 |
| 20090092134 | Method for Geolocation based on the unique identifier information of an electronic device detected by the first router in a network connection - A system to determine the geographical location of an origin electronic device with networking capabilities, based on the information provided by data carrier companies. Each company assign to geographic coordinates their last mile connections. In the communications between two machines located in different Local Area Network, data packets show the following characteristics: | 2009-04-09 |
| 20090092135 | SYSTEM AND METHOD FOR ROUTER DATA DISTRIBUTION - Employing an asymmetric protocol, multiple sources reliably broadcast dynamically changing routing tables incrementally across multiple consumers from a single distributor. Each of multiple sources send current tables to the distributor using a snapshot mechanism. Message are buffered, segmented, paced by timers, and broadcast to the consumers repetitively at the distributor. Negative acknowledgments from the consumer request missing messages from the distributor after receipt of a keepalive message from the distributor. The distributor marks the missing messages and retransmits replacements from a history buffer only after firing of a resend timer. A unique Session ID included in all messages originating from each particular source facilitates reliable table distribution from multiple sources to multiple consumers via a single distributor. | 2009-04-09 |
| 20090092136 | SYSTEM AND METHOD FOR PACKET CLASSIFICATION, MODIFICATION AND FORWARDING - A system may include a processor that is arranged and configured to receive initial data packets from a data stream, to classify the initial data packets from the data stream and to populate one or more tables with information based on the classification of the initial data packets from the data stream. The system may include a bus in communication with the processor and an engine, in communication with the bus, that is arranged and configured to process subsequent data packets from the data stream using the information present in the one or more tables such that the subsequent data packets from the data stream bypass the processor. | 2009-04-09 |
| 20090092137 | VIRTUALIZED APPLICATION ACCELERATION INFRASTRUCTURE - In one example embodiment, a system and method is illustrated that includes processes a first data packet using a first operating system, the first data packet received from a first network. A second operation is shown that processes a second data packet using a second operating system, the second data packet received from a second network. Further, an additional operation is shown that determines a route associated with the first data packet and the second data packet, the route including at least one of a logical route or physical route. Moreover, an operation is shown that parses the first data packet into at least one first logical segment, and parsing the second data packet into at least one second logical segment. An operation is shown that transmits the first logical segment and the second logical segment as at least one data packet across the WAN. | 2009-04-09 |
| 20090092138 | APPARATUS AND METHOD FOR GENERATING AND PARSING MAC PDU IN A MOBILE COMMUNICATION SYSTEM - An apparatus and method for generating and parsing a MAC PDU in a mobile communication system are provided in which LCIDs of MAC SDUs to be multiplexed are checked, the length of an LF is determined for each of the MAC SDUs, referring to LF lengths predetermined for the LCIDs, a MAC header including the LCIDs and LFs of the determined lengths for the MAC SDUs is generated, and a MAC PDU is generated by attaching the MAC header to payload including the MAC SDUs. During the MAC header generation, if a padding size required for the MAC PDU generation calculated taking into account the absence of a last LF in the MAC header is larger than the length of the last LF, the last LF is included in the MAC header, the required padding size is recalculated, taking into account the inclusion of the last LF, and a padding is added according to the re-calculated padding size. | 2009-04-09 |
| 20090092139 | Time sensitive scheduling data delivery network - Communications network based passive delivery of time sensitive scheduling data to an entity is described. Specific time sensitive scheduling data streams are created from aggregating time sensitive scheduling data from multiple originating organizations, affiliated groups of individuals, and individuals. Specific time sensitive scheduling data from originating organizations, affiliated groups of individuals, and individuals are sent via the passive delivery communications network. Specific time sensitive scheduling data streams aggregated from the multiple originating organizations, affiliated groups of individuals, and individuals are transmitted via the passive delivery communications network to the entity based on desirability and relevancy of time sensitive scheduling data. Specific time sensitive scheduling data from originating organizations, affiliated groups of individuals, and individuals are received via the passive delivery communications network. The passive delivery of time sensitive scheduling data to the entity is accommodated based upon derived interests of the entity via a time sensitive scheduling data receiving device. | 2009-04-09 |
| 20090092140 | METHOD AND APPARATUS FOR PROVIDING A HIERARCHICAL STRUCTURE FOR ROUTING - A method and apparatus for providing a hierarchical structure for routing over packet networks are disclosed. The method first receives one or more packets from at least one customer endpoint device with a Customer Edge (CE) functionality, wherein said one or more packets are destined for a destination node. The method locates a route for routing said one or more packets by consulting an interface specific routing table. The method then forwards said one or more packets towards said destination node using said route. | 2009-04-09 |
| 20090092141 | SWITCH WITH VIRTUAL NETWORK IDENTIFIER RE-WRITE CAPABILITY - A switch includes a processor, an ingress port having ingress port logic, and an egress port. It may also include a virtual network identifier rewrite component for rewriting a virtual network identifier in a data frame received the ingress port with a new virtual network identifier. Also included is a virtual network identifier rewrite rule set, where a rule may have one or more of the following: a received virtual network identifier, a source Fibre Channel identifier (FCID) address, an ingress port identifier, and a new virtual network identifier. The ingress port logic may insert a received virtual network identifier into the data frame received at the ingress port, where the virtual network identifier may correspond to the ingress port. The virtual network identifier rewrite component may assign the new virtual network identifier to the data frame according to a specific virtual network identifier rewrite rule. | 2009-04-09 |
| 20090092142 | METHODS, SYSTEMS AND COMPUTER PROGRAM PRODUCTS FOR DYNAMIC COMMUNICATION DATA ROUTING BY A MULTI-NETWORK REMOTE COMMUNICATION TERMINAL - Methods, systems and computer program products of dynamic communication data routing by a multi-network remote communication terminal across a plurality of networks are provided. The multi-network remote communication terminal is delivered to a locality to receive communication services. The terminal is communicatively connected to a first network, a second network, the second network having a communication characteristic different from the first network, and to a user endpoint device positioned in the locality. Communication data directed to a target device from the user endpoint device is received at the terminal. A characteristic of the received communication data is determined. Routing of received communication data to the target device is allocated across the first network and/or the second network based on the determined characteristic of the received communication data and the communication characteristics of the first and second network. Routing of the received communication data is dynamically re-allocated based on a detected change in the characteristic of the communication data. | 2009-04-09 |
| 20090092143 | Mesh network communication systems and methods - A mesh network communication system including one or more mesh networks and a plurality of remote subscriber users employing wireless, spread spectrum type communications for communicating with an access node in one of the mesh networks. The remote subscriber units can be mobile and can use handover to change nodes within a mesh network without a disruption of communication. The system and methods determine the location of a remote subscriber unit in a mesh network by the remote subscriber unit providing the access node with its home address and ID such that if the access node is not the home node, the home node is notified of the visiting node address such that the home node always knows the location of any remote subscriber unit based at the home node. Accordingly, communication between remote subscriber units where one of the remote subscriber units is not currently located at its home node can be accomplished without using the home node. | 2009-04-09 |
| 20090092144 | Communication Network, a Method of Routing Data Packets In Such Communication Network and a Method of Locating and Securing Data of a Desired Resource in Such Communication Network - A communication network comprising a plurality of network nodes is provided, wherein the network nodes are logically arranged to form a plurality of concentric rings, all rings except the outermost ring being with high probability fully constructed; the number of nodes on each fully constructed ring being d | 2009-04-09 |
| 20090092145 | Network system - A network system includes a switch device and a plurality of communication terminals. The switch device has a plurality of ports. The switch device receives a packet at its one port and transmits the packet from another port corresponding to the packet's destination. The communication terminals are connected to the ports of the switch device respectively to transmit and receive packets. The terminal transmits a connection request including connection destination information to the switch device and performs communication using unused signal lines when a “connection possible” notification is received from the switch device. Upon receiving the connection request, the switch device determines if connection to a port corresponding to the connection destination information is possible. If connection is possible, the switch device transmits a “connection possible” notification to the connection-request-making terminal and connects an unused signal line of the port connected to the terminal to a signal line of the port corresponding to the connection destination. | 2009-04-09 |
| 20090092146 | System, method and computer readable medium for communication on a Zigbee network - In a Zigbee network, reliable communications are provided by maintaining messages transmitted from a device in a message queue in the device. If no successful acknowledgement is received for a transmitted message, the message is re-transmitted when the message queue executes. Messages are deleted from the queue when the message is successfully transmitted or when a maximum number of re-tries has been exhausted. | 2009-04-09 |
| 20090092147 | Packet communication device, packet communication system, packet communication system, packet communication module, data processor, and data transfer system - A transmit packet generated by a CPU | 2009-04-09 |
| 20090092148 | RESOURCE REMAPPING AND REGROUPING IN A WIRELESS COMMUNICATION SYSTEM - Methods and apparatus for remapping and regrouping transmission resources in a wireless communication system. First, a set of new permutation algorithms based on Galois field operation is proposed. Then the proposed algorithms and the known Pruned Bit Reversal Ordering (PBRO) algorithm are applied to several of various resource mapping schemes, including slot or symbol level Orthogonal Cover (OC)/Cyclic Shift (CS) mapping, cell-specific slot-level and symbol-level CS hopping patterns, and subframe and slot level base sequence hopping patterns. | 2009-04-09 |
| 20090092149 | ONE-GOOD-PAIR OPERATION IN DUAL-PAIR MODE - A communication system comprising at least one communication unit. Each communication unit includes an interface port, a first-digital-subscriber-line port, a second-digital-subscriber-line port, and a central processing unit. The central processing unit is communicatively coupled to receive information indicative of the operability of the first-digital-subscriber-line port and the second-digital-subscriber-line port. The at least one communication unit is implemented on the physical layer in single-pair mode. The at least one communication unit is configured to switch from sending timeslots in dual-pair mode to sending timeslots in 1+1 protection mode when communication on one of the first-digital-subscriber-line port and the second-digital-subscriber-line port fails. | 2009-04-09 |
| 20090092150 | HYBRID CROSS-LINK - A communication system comprises a first communication unit having a plurality of application ports; and a second communication unit having a plurality of application ports and coupled to the first communication unit; wherein the first communication unit is configured to extract timeslots from a first signal having a first interface format and from a second signal having a second interface format, and to insert the extracted timeslots into a frame for transmission to the second communication unit; wherein the second communication unit is configured to pass the first interface format signal to an application port of a similar interface format and to pass the second interface format signal to an application port of a third dissimilar interface format based on the order of the extracted timeslots in the frame transmitted from the first communication unit. | 2009-04-09 |
| 20090092151 | METHOD FOR THE MANAGEMENT OF BANDWIDTH IN A COMMUNICATIONS NETWORK, CORRESPONDING COMPUTER-READABLE STORAGE MEDIUM AND DEVICES - A method for managing bandwidth in a synchronous communications network comprising a plurality of nodes, the network implementing a first clocking which defines a data-processing cycle comprising a determined number of virtual channels, the data-processing cycle being defined by a current data-processing frequency, said plurality of nodes comprising at least one transmitter node associated with at least one generator application, each generator application being associated with at least one virtual channel for transmitting its data, said virtual channel or channels associated with a given generator application being filled one by one from the first to a last virtual channel. Such a method comprises the following steps performed for a given generator application: determining a rate of use of the last virtual channel of the set of virtual channels; adjusting said current data-processing frequency; and allocating an integer number of virtual channels. | 2009-04-09 |
| 20090092152 | Method and System for Dynamically Adjusting Forward Error Correction (FEC) Rate to Adapt for Time Varying Network Impairments in Video Streaming Applications Over IP Networks - Certain aspects of a method and system for dynamically adjusting forward error correction (FEC) rate to adapt for time varying network impairments in video streaming applications over IP networks may be disclosed. At a server side of a client-server communication system, a rate of transmission of forward error correction (FEC) packets to one or more clients may be dynamically adjusted based on receiving at least one upstream FEC packet from a plurality of clients. The rate of transmission of the FEC packets to the plurality of clients may be increased when a rate of occurrence of lost data packets is above a particular threshold value. The upstream FEC packets may comprise an urgent packet requesting transmission of a particular FEC packet in order to recover one or more particular lost data packets. | 2009-04-09 |
| 20090092153 | Downstream Synchronous Multichannels for a Communications Management System - Downstream synchronous multichannel (DSSM) communications are provided among a plurality of carriers, each being a completely DOCSIS™ 2.0-compliant downstream. The synchronous multichannels support communications with both DSSM-capable communications nodes and non-DSSM-capable communications nodes (e.g., legacy cable modems). Non-DSSM packets are transmitted on a single channel. DSSM packets are split into multiple pieces, which are transmitted simultaneously on all available channels. Since the physical delay variation (e.g., group delay change) across the adjacent carriers is small (on the order of a symbol time), the multiple pieces arrive at the receiving communications nodes at nearly the same time and can be reassembled with minimal buffering and no packet ordering problems. To avoid causing trouble for the non-DSSM-capable communications nodes, the packet pieces are encapsulated with a header that causes the non-DSSM-capable communications nodes to silently discard them. | 2009-04-09 |
| 20090092154 | METHOD, SYSTEM, AND APPARATUS FOR EXTENDED RATE/RANGE COMMUNICATION OVER A COMMUNICATION NETWORK - A technique for communicating multimedia data between nodes over coaxial cable, wherein the nodes are connected via a coaxial cable network, is disclosed. In an embodiment, the technique involves establishing a primary channel for communicating between first and second nodes of the coaxial cable network, establishing a secondary channel for communicating between the first and second nodes of the coaxial cable network, wherein the primary and secondary channels are in different frequency bands and wherein the primary channel is used for communicating media access control frames, and communicating a time series of data frames between the first and second nodes using both the primary channel and the secondary channel. | 2009-04-09 |
| 20090092155 | METHOD AND APPARATUS FOR CONTROLLING ACCESS TO A COMMUNICATION CHANNEL - A method and an apparatus provide for controlled access to a shared communication medium. Time slots on a forward channel include information regarding status useful for remote units to determine whether a reverse channel is available for seizure. Additionally, information along the forward channel provides guidance to the remote units to control attempts to seize the reverse channel. In one embodiment a remote unit divides a data package into a plurality of portions and attempts to seize the reverse channel using a single portion of the data package which corresponds to one time slot on the reverse channel. It then waits until it receives notification along the forward channel that the first data portion was successfully received before it attempts to send any of the remainder of its data in consecutive time slots on the reverse channel. | 2009-04-09 |
| 20090092156 | DEVICES AND METHODS FOR PROVIDING STIMULATED RAMAN LASING - Devices and methods for providing stimulated Raman lasing are provided. In some embodiments, devices include a photonic crystal that includes a layer of silicon having a lattice of holes and a linear defect that forms a waveguide configured to receive pump light and output Stokes light through Raman scattering, wherein the thickness of the layer of silicon, the spacing of the lattice of holes, and the size of the holes are dimensioned to provide Raman lasing. In some embodiments, methods include forming a layer of silicon, and etching the layer of silicon to form a lattice of holes with a linear defect that forms a waveguide configured to receive pump light and output Stokes light through Raman scattering, wherein the thickness of the layer of silicon, the spacing of the lattice of holes, and the size of the holes are dimensioned to provide Raman lasing. | 2009-04-09 |
| 20090092157 | Powerful fiber laser system - A powerful fiber laser system is configured with at least one large-area multi-clad rare-earth doped fiber, which is configured with a MM core capable of propagating a single mode laser emission at a first wavelength, and with at least one pumping assembly capable of generating an optical pump output at a wavelength shorter than the first wavelength of the rare-earth doped fiber. The pumping assembly has a plurality SM fiber lasers coupled to a SM-MM combiner which is operative to lunch the pump output into the cladding of the rare-earth doped fiber so that the powerful fiber laser system is operative to deliver a power of up to 20 kW. | 2009-04-09 |
| 20090092158 | Multi-aperture Three-Dimensional Beamforming - In one embodiment, a system is provided that includes: a mode-locked laser source configured to provide a pulsed multi-frequency laser output signal having spectrum with a plurality of comb lines, wherein one of the comb lines is a reference comb line, the comb lines forming a plurality of comb line pairs comprising the reference comb line and selected ones of the remaining comb lines; a plurality of optical-electronic (OE) conversion circuits, each OE circuit corresponding on a one-to-one basis to the plurality of comb line pairs, wherein each OE circuit is configured to provide an electrical output signal having a frequency corresponding to a heterodyning of the comb lines in its corresponding comb line pair; a plurality of amplifiers corresponding on a one-to-one basis with the OE conversion circuits, each amplifier configured to amplify a version of the electrical output signal from its corresponding OE conversion circuit so as to provide an amplified output signal; and an array of antennas corresponding on a one-to-one basis to the plurality of amplifiers, each antenna configured to transmit the amplified output signal from the corresponding amplifier, whereby the array of antennas transmits a coherent and multi-frequency signal output pulse. | 2009-04-09 |
| 20090092159 | Semiconductor light-emitting device with tunable emission wavelength - The present invention is to provide a semiconductor light-emitting device with a variable output wavelength that reduces the wavelength dependence of the optical output power. The light-emitting device provides an optical cavity defined by a reflective end and a reflector. The gain waveguide and the ring resonator are set within the cavity. The reflector comprises a plurality of gratings each accompanied with an electrode. The periodicity of the refractive index in respective gratings is different from each other. The ring resonator shows a plurality of transmission maxima. The light-emitting device emits light with a wavelength defined by the transmission maxima of the ring resonator and the enhanced reflectivity region adjusted by the bias applied to electrodes of the optical reflector. | 2009-04-09 |
| 20090092160 | EXTERNAL CAVITY LASER WITH A TUNABLE HOLOGRAPHIC ELEMENT - Embodiments of systems and methods are provided for a tunable laser device. The tunable laser device may include a tunable Bragg reflector that allows its wavelength to be tuned via temperature and/or pressure. This Bragg reflector may include holographic material in which a Bragg grating may be formed comprising parallel fringes of alternating index of refractions. Temperature and/or pressure changes may be effected in the Bragg reflector by, for example, a thermoelectric cooler and/or piezo transducer. | 2009-04-09 |
| 20090092161 | LASER POINTER WITH CONTROLLABLE PATTERN AND SIZE OF PROJECTED IMAGE - A laser pointer includes a human-machine interface disposed above the housing for users to control components inside the housing to decide patterns and size of the projecting image. The components consist of a frequency/phase control module, a driving energy control module, a laser beam generating module and a light scanning device. The frequency/phase control module controls the driving energy control module while the driving energy control module controls driving energy of the light scanning device. The size of the image is controlled by change of the amplitude of the light scanning device while the amplitude is changed along with the driving energy. The amplitude may also change along with the driving frequency. When the driving energy is fixed and the driving frequency is close to the resonant frequency, the amplitude increases. On the contrary, the amplitude decreases. | 2009-04-09 |
| 20090092162 | Means for improved implementation of laser diodes and laser diode arrays - A laser diode system is disclosed in which a substrate made of a semiconductor material containing laser diodes is bonded to a substrate made from a metallic material without the use of any intermediate joining or soldering layers between the two substrates. The metal substrate acts as an electrode and/or heat sink for the laser diode semiconductor substrate. Microchannels may be included in the metal substrate to allow coolant fluid to pass through, thereby facilitating the removal of heat from the laser diode substrate. A second metal substrate including cooling fluid microchannels may also be bonded to the laser diode substrate to provide greater heat transfer from the laser diode substrate. The bonding of the substrates at low temperatures, combined with modifications to the substrate surfaces, enables the realization of a low electrical resistance interface and a low thermal resistance interface between the bonded substrates. | 2009-04-09 |
| 20090092163 | LASER DIODE AND METHOD OF MANUFACTURING THE SAME - Provided is a laser diode which realizes NFP with a stable and uniform shape. The laser diode includes, on a semiconductor substrate, an active layer, one or a plurality of strip-shaped current confinement structures confining a current which is injected into the active layer, and a stacked structure including one or a plurality of strip-shaped convex portions extending in an extending direction of the current confinement structure. | 2009-04-09 |
| 20090092164 | OPTICAL SEMICONDUCTOR DEVICE AND METHOD OF MANUFACTURING SAME - The reliability of a buried hetero-structure semiconductor laser is improved by preventing an increase in oscillation threshold current and a decrease in external differential quantum efficiency in cases where the semiconductor laser is energized continuously under conditions of high temperature and high optical output. An optical semiconductor laser has an optical waveguide structure comprising an n-type cladding layer, an active layer and p-type cladding layers, and a current narrowing/blocking structure comprising a p-type blocking layer and an n-type blocking layer, wherein concentration of hydrogen contained in the p-type cladding layers is higher than concentration of hydrogen contained in the p-type blocking layer. | 2009-04-09 |
| 20090092165 | LASER DIODE HAVING NANO PATTERNS AND METHOD OF FABRICATING THE SAME - A laser diode having nano patterns is disposed on a substrate. A first conductive-type clad layer is disposed on the substrate, and a second conductive-type clad layer is disposed on the first conductive-type clad layer. An active layer is interposed between the first conductive-type clad layer and the second conductive-type clad layer. Column-shaped nano patterns are arranged at a surface of the second conductive-type clad layer to form a laser diode such as a distributed feedback laser diode. | 2009-04-09 |
| 20090092166 | Nitride semiconductor light-emitting device - A nitride semiconductor light-emitting device wherein a substrate or nitride semiconductor layer has a defect concentration region and a low defect density region other than the defect concentration region. A portion including the defect concentration region of the nitride semiconductor layer or substrate has a trench region deeper than the low defect density region. Thus by digging the trench in the defect concentration region, the growth detection is uniformized, and the surface planarity is improved. The uniformity of the characteristic in the wafer surface leads to improvement of the yield. | 2009-04-09 |
| 20090092167 | MODE-LOCKED SHORT PULSE LASER RESONATOR AND SHORT PULSE LASER ARRANGEMENT - A mode-locked short pulse laser resonator including a pump laser beam input, a non-linear laser medium, a plurality of resonator mirrors as well as a first outcoupler mirror and a second outcoupler mirror, wherein the first outcoupler mirror is arranged for coupling out laser radiation having first spectral properties, and the second outcoupler mirror is arranged for coupling out laser radiation having second spectral properties which are different from the first spectral properties. | 2009-04-09 |
| 20090092168 | LASER MODULE AND OPTICAL PICKUP DEVICE - A laser module includes a stem provided with a device mounting structure; a light emitting device mounted onto the stem by use of the device mounting structure a tubular cap fixed to the stem in the state of surrounding the light emitting diode and provided with an aperture through which to pass laser light emitted by the light emitting device; and a light transmitting plate fixed, by use of a bonding material, to an inside surface of the cap in the state of closing the aperture. An annular projection projecting to the inside of the cap in the optical axis direction of the laser light is provided at a peripheral edge part of the aperture of the cap, and the light transmitting plate is fixed to the inside surface of the cap inclusive of the projection by use of the bonding material. | 2009-04-09 |
| 20090092169 | Device, Method and Vessel Assembly for the Measurement of Heat Flow at Least One Sample - The present invention relates to a device and a method for the measurement of heat flow from at least one sample. The device | 2009-04-09 |
| 20090092170 | CALORIMETER - A calorimeter includes a bucket cover which is used to reconfigure an isothermal water reservoir to provide for temperature equilibration prior to sample analysis and subsequently define a fixed volume of water during analysis in which high precision temperature measurements can be recorded. The apparatus includes mechanisms for sealing and controlling the cover, and for coupling the combustion vessel to the cover while minimizing the thermal contact between them. Improved thermal isolation between the fixed volume of water and the surrounding environment is also achieved. | 2009-04-09 |
| 20090092171 | Method for controlling an expandable mixture - A method is disclosed that monitors and controls the condition of an expandable mixture before injecting it in a mold and that maintains the conditions for filling so as to make a casting mold having a uniform strength. | 2009-04-09 |
| 20090092172 | PROBE COVER CASSETTE WITH IMPROVED PROBE COVER SUPPORT - A cassette of tympanic thermometer probe covers includes a frame and probe covers releasably attached to the frame. The probe covers can be individually attached over a probe of a tympanic thermometer to protect the probe from contamination. The probe covers are constructed to releasably secure themselves to the probe. The force required to secure the probe covers to the frame is less that the force which is required to detach the probe covers from the frame so that the probe cover is held by the frame while being attached to the thermometer probe. The probe cover is connected to the frame by frangible connections that are arranged to inhibit pivoting of the probe cover when being attached to the thermometer probe. A method of securing a probe cover to a probe of a tympanic thermometer is also disclosed. | 2009-04-09 |
| 20090092173 | METHOD FOR MONITORING THE STATE OF A TUBE FOR A COATING IN A SYSTEM OF PIPES OR DUCTS - A method for monitoring a status of a sleeve for lining a system of pipes or conduits, the sleeve being impregnated with a curable resin, includes the steps of providing the sleeve, disposing at least one fiber optic sensor in thermally conductive contact with the sleeve, and generating, using the at least one fiber optic sensor, a positionally resolved thermographic image representative of a temperature of the sleeve as a function of position and time | 2009-04-09 |
| 20090092174 | OPTIMIZING TRANSMISSION FOR BROADCAST MULTICAST SERVICE - The present invention is method and system for transmitting a signal in a wireless communication system. The present invention includes differentiating a data stream into at least a first layer data stream and a second layer data stream. At least the first layer data stream and the second layer data stream are then channel coded. Afterward, at least one of the channel coded first layer data stream and the channel coded second layer data stream is spread. | 2009-04-09 |
| 20090092175 | CDMA RECEIVING APPARATUS - Disclosed is a CDMA receiver including a delay profile generating unit for generating a plurality of delay profiles in time slots; path detecting units for detecting paths from the plurality of delay profiles; delay spread calculating units for calculating delay spreads based upon the detected paths; a finger-number-allocation calculating unit for calculating a number of fingers to be allocated based upon number of detected paths and delay spreads; and finger allocating units for allocating fingers to the detected paths from the number of fingers to be allocated as calculated by the finger-number-allocation calculating unit. | 2009-04-09 |
| 20090092176 | REGENERATOR UNIT - A communication system comprises a central unit configured to transmit and receive communication signals; a remote unit configured to transmit and receive communication signals; and a regenerator unit configured to regenerate and transmit received communication signals, the regenerator unit comprising a first interface, a second interface and a control and status circuit configured to control operation of the first and second interface, wherein each interface is configured to operate as an independent logical regenerator unit; wherein the central unit and the remote unit communicate over a first communication loop via the first independent interface of the regenerator unit. | 2009-04-09 |
| 20090092177 | VECTOR SIGNAL MEASURING SYSTEM, FEATURING WIDE BANDWIDTH, LARGE DYNAMIC RANGE, AND HIGH ACCURACY - A new measurement system, with two receiver channels per measurement port, has been developed that provides absolute magnitude and absolute phase relationship measurements over wide bandwidths. Gain ranging is used at RF to provide optimum noise performance and a swept YIG preselector filter is used to avoid spurious signals. A new absolute vector error correction method is used to calibrate the measurement system in order to allow for absolute vector measurements, and it also removes the time-varying responses caused by the swept YIG preselector filters. A quasi-reciprocal mixer with a characterized non-reciprocal ratio is used to provide the absolute calibration standard. The two receiver channels can be adapted to a wide variety of applications, including wide bandwidth vector signal analyzer measurements, mixer measurements, and harmonic measurements. The two-channels can also be used as an absolute calibrated transmitter/reflectometer. | 2009-04-09 |
| 20090092178 | Techniques for Estimating Received Signal Strength and Carrier to Interference and Noise Ratio in OFDM Systems - A technique for determining a received signal strength indicator of a target base station at a subscriber station includes performing a discrete Fourier transform on a received signal to provide a transformed signal. In this case, the transformed signal occupies one or more segments of a channel and the one or more segments each include multiple subcarriers. A shift-n cross-correlation is calculated based on the transformed signal and a preamble sequence of the target base station to provide a coarse received signal strength indicator for the target base station. | 2009-04-09 |
| 20090092179 | Method and a circuit for estimating the signal quality of a communication channel and a wireless receiving apparatus using the same - A method for estimating the signal quality of a communication channel is disclosed. Firstly, an input signal passes through a match filter at the initial stage of an estimation period. Next, the output of the match filter is calculated to obtain the noise reference value within a pre-determined period. The output value of the match filter and the noise reference value are compared. When the output value of the match filter is larger than the noise reference value, a valid power value is obtained according to the output value of the match filter. The valid power values are accumulated. Finally, a SNR is calculated according to the noise reference value and the accumulated valid power value at the end of the estimation period. Thereby, the signal quality of the wireless communication channel is estimated according to the SNR, and the signal transmission rate is determined. | 2009-04-09 |
| 20090092180 | EQUALIZER CIRCUITRY FOR MITIGATING PRE-CURSOR AND POST-CURSOR INTERSYMBOL INTERFERENCE - One or more embodiments of the invention comprise a continuous-time equalizer (CTE) for reducing both pre-cursor and post-cursor intersymbol interference (ISI) from data received from a communication channel. One such equalizer comprises two independent stages that process the input signal in parallel. One stage subtracts a scaled version of the derivative of the input signal from a scaled version of the input signal to reduce pre-cursor ISI from the input signal. The other stage adds a scaled version of the derivative of the input signal to a scaled version of the input signal to reduce post-cursor ISI from the input signal. The outputs from the two stages are then multiplied to arrive at an output signal in which both pre- and post-cursor ISI is minimized. Because the scalars used in each of the stages are independent, each can be adjusted for greater manipulation of the ISI-reduced signal. | 2009-04-09 |
| 20090092181 | SCALING EQUALIZER COEFFICIENTS AFTER AUTOMATIC GAIN CONTROLLER GAIN ADJUSTMENTS - In one embodiment, a receiver comprises an automatic gain controller (AGC), an equalizer, a controller, and a register interface. The AGC makes gain adjustments to compensate for changes in the average amplitude of a received signal. The equalizer has a coefficient updater that calculates coefficients and a finite impulse response (FIR) filter that applies the coefficients to the received signal to generate an equalized signal. During gain adjustments by the AGC, the register interface provides a weight freeze signal to the coefficient updater, which subsequently freezes the updating of the coefficients for a freeze duration period. Then, register interface provides a scaling factor, generated by the controller based on the size of the gain adjustment, to the coefficient updater. At the end of the freeze period, coefficient updater applies the scaling factor to the coefficients and unfreezes the coefficient updating. | 2009-04-09 |
| 20090092182 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SPACE BLOCK CODING SIGNAL THROUGH ITERATIVE MULTI-USER DETECTION - A method and apparatus for transmitting and receiving a space block coding signal through Iterative Multi-user Detection is provided. The apparatus includes a multi-user interference cancellation unit which cancels multi-user interference in a received signal and outputs a first signal and a second signal that are sequentially transmitted from two transmitting antennas, a linear combiner which performs linear combination for the first signal and the second signal, and an equalizer which applies different equalization coefficients to the combined first signal and the second signal, respectively, to perform frequency-domain equalization. | 2009-04-09 |
| 20090092183 | Video Content Monitoring Device and Methods Thereof - A method of providing video content includes monitoring packets communicated between data processing devices in a network. The packets are monitored at a third data processing device in the network backbone. Based on the monitored packets, statistics are collected that indicate the popularity of video content items available via the network. The most popular video content items, as indicated by the collected statistics, are made available via a web page. | 2009-04-09 |
| 20090092184 | POWER SAVING DECODER ARCHITECTURE - A method and system are provided for decoding coded video data by turning off or not loading at least one functional unit or functional subunit of the decoder while decoding a portion of the coded video data. A schedule may be created prior to substantive decoding and then the schedule may be used to decode coded video data. The coded video data may be reordered based on the functional units or subunits the portions of the coded video data need for decoding. The portions of the coded video data are reordered into their original order in an output buffer after being decoded. The decoder may determine which functional units or subunits are needed for decoding based on administration information included with the coded video data. The decoder may decode portions of the coded video data in parallel. | 2009-04-09 |
| 20090092185 | PORTABLE DEVICE FOR PROCESSING MULTIMEDIA SIGNAL AND METHOD USING THE SAME - A portable device for processing a multimedia signal is provided. The portable device includes: a signal receiver to receive a multimedia signal from a mobile terminal, the multimedia signal being received in the mobile terminal from a service providing server; a decoding-related information generation unit to generate decoding-related information which is related to at least one of a codec and a resolution; a decoder to decode the multimedia signal according to the decoding-related information, and to generate multimedia information; and a multimedia information transmitter to transmit the multimedia information to an external display device. | 2009-04-09 |
| 20090092186 | MOVING IMAGE ENCODING APPARATUS AND METHOD FOR CONTROLLING THE SAME - The invention generates encoded data that properly conforms to pre-specified image quality and suppresses a large change in image quality. An encoding unit encodes pictures block by block according to a parameter. A distortion amount calculation unit calculates a picture distortion amount between a decoded picture and a picture before being encoded. A scene distortion amount calculation unit calculates a scene encoding distortion amount from the picture distortion amounts of a plurality of pictures having been encoded. A distortion bit rate conversion unit calculates a corrected bit rate by calculating a difference between a target distortion amount and the calculated scene encoding distortion amount, and multiplying the calculated difference by a coefficient. A target bit rate calculation unit calculates a bit rate for a picture subsequent to a picture of interest by adding a current target bit rate to the corrected bit rate, and sets it as the parameter. | 2009-04-09 |
| 20090092187 | Luma and Chroma Decoding Using a Common Predictor - There are provided video encoders, video decoders, and corresponding methods. A video encoder for encoding video signal data for an image block includes an encoder for encoding all color components of the video signal data using a common predictor. A video decoder for decoding video signal data for an image block includes a decoder for decoding all color components of the video signal data using a common predictor. Additionally, an apparatus and method for encoding and decoding signal data for an image block includes an encoder and decoder for encoding/decoding color components of the video signal data without applying a residual color transform thereto. Furthermore, a video encoder and decoder for encoding/decoding video signal data for an image block includes an encoder and decoder for encoding/decoding the video signal data using unique predictors for each of color components of the video signal data. | 2009-04-09 |
| 20090092188 | METHOD AND APPARATUS FOR INTER PREDICTION ENCODING/DECODING AN IMAGE USING SUB-PIXEL MOTION ESTIMATION - A method of inter prediction encoding of an image, the method including: searching for a first reference block in a reference picture by using a current block, and estimating a first motion vector in a first pel unit in regards to the first reference block; estimating a second motion vector by using pixels included in a pre-encoded area adjacent to the current block, and pixels adjacent to the first reference block, and determining a second reference block based on the second motion vector; and encoding the current block based on the first motion vector and the second reference block. | 2009-04-09 |
| 20090092189 | MOVEMENT PREDICTION METHOD AND MOVEMENT PREDICTION APPARATUS - Disclosed herein is a movement-prediction/compensation method for carrying out processing based on search layers to search for a movement vector by selecting one or more reference frame images for each of movement-compensated blocks obtained as a result of dividing a processed frame image existing among successive frame images. The method includes: a layer creation step; a first movement-prediction/compensation step; a reference frame image determination step; and a second movement-prediction/compensation step. | 2009-04-09 |
| 20090092190 | METHODS AND APPARATUS FOR INTEGRATING EXTERNAL APPLICATIONS INTO AN MPEG-4 SCENE - A method of decoding, composing and rendering a scene. First information is obtained, the first information including a part of a MPEG-4 BIFS scene description stream and at least one coded MPEG-4 media stream. The first information is decoded by invoking a BIFS scene decoder and one or more specific media decoders that are required by the scene. Second information is obtained, the second information including a second part of a BIFS scene description stream that contains a reference to an external application. The second information is decoded by invoking the BIFS scene decoder and an external application decoder. An integrated scene is composed, the integrated scene including one or more decoded MPEG-4 media objects and one or more external application objects specified in the decoded scene descriptions streams. The composed integrated scene is rendered on a display. | 2009-04-09 |
| 20090092191 | MOVING IMAGE ENCODING APPARATUS AND METHOD FOR CONTROLLING THE SAME - The invention provides encoded moving image data having good image quality even in a scene having a high difficulty level. A unit counts a number of pictures to determine a break between scenes. A unit encodes block by block in an inputted picture. A unit calculates a block distortion between a decoded picture and a picture before being encoded. A unit calculates a surplus encoded data amount with respect to an encoded data amount equally allocated to each scene from the encoded data amount of each picture and a preset sequence target bit rate. A target encoded data amount is calculated based on an average block distortion of a scene and the surplus encoded data amount. The encoded data amount of the first picture of a scene is compared with a threshold, and the initial parameter is corrected to determine the parameter for encoding the second and subsequent pictures. | 2009-04-09 |
| 20090092192 | Multi-frequency data transmission channel power allocation - A method of controlling a communication device that is operable to transmit digital data over a plurality of frequency channels. The method includes selecting an initial transmission power and a corresponding data rate for each channel. The method also includes identifying in a first channel a first ratio of a first decrement in transmission power to a first data rate decrement that is greater than a second ratio of a second decrement in transmission power to a second data rate decrement. Then, the initial transmission power allocation of the first channel is reduced by the first decrement. The method also includes reallocating the decremented initial transmission power of the first channel to one or more other channels. | 2009-04-09 |
| 20090092193 | MULTI CARRIER TRANSMISSION DEVICE, MULTI CARRIER RECEPTION DEVICE, AND COMMUNICATION METHOD - Provided is a multi carrier transmission device capable of compensating the delay time and the imbalance and the orthogonal difference between the in-phase component and the orthogonal component of the amplitude at a low cost without increasing the circuit size. In this device, a coordinate conversion unit ( | 2009-04-09 |
| 20090092194 | ADAPTIVE PILOT DESIGN FOR MOBILE SYSTEM - A method, and device implementing the method, for adaptively allocating pilot signals in a wireless communication system. The method includes receiving channel data, including channel length (L) data, inter-carrier interference power (P | 2009-04-09 |
| 20090092195 | METHOD AND SYSTEM FOR ADAPTIVE PEAK TO AVERAGE POWER RATIO REDUCTION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION NETWORKS - A method and system adaptively reduce a peak-to-average power ratio in a communication system. Energy is clipped from at least one peak of a modulated signal. The modulated signal includes a plurality of sub-carriers. At least one data sub-carrier is adaptively selected for peak-to-average power ratio reduction use based on known scheduling information. The clipped energy is distributed among at least one data sub-carrier. | 2009-04-09 |
| 20090092196 | Data Transmission Via Multi-Path Channels Using Orthogonal Multi-Frequency Signals With Differential Phase Shift Keying Modulation - A method and an apparatus relating to an OFDM data communications system where the sub-carriers are modulated using differential quadrature phase-shift keying (DQPSK). The multi-carrier transmitted signal is directly generated by means of summation of pre-computed sample points. As part of the multi-carrier signal generation, a signal for the guard interval is established. In an acoustic application of this approach, direct radiation of the sub-carrier approach is facilitated. Symbol synchronization in the receiver is based on signal correlation with the missed sub-carrier. Separation of the sub-carriers in the receiver by means of correlation of the received signal and reference signals that are derived from a table of pre-computed values. Optimal non-coherent processing of the sub-carriers without any phase tracking procedures is achieved. | 2009-04-09 |
| 20090092197 | OFDM DEMODULATION DEVICE AND METHOD - The present invention provides an OFDM demodulation device for demodulating an orthogonal frequency division multiplexed (OFDM) signal whose transmission unit is a transmission symbol produced by quadrature modulation in such a way that information is divided for a plurality of subcarriers in a predetermined band. The OFDM demodulation device includes a carrier frequency offset detecting circuit ( | 2009-04-09 |
| 20090092198 | Communication apparatus and radio communication system - A communication apparatus includes a grouping controlling unit hierarchically groups frequency channels so that the number of channels included in a group of a layer becomes smaller than the number of channels included in a group of a layer immediately above; and a propagation path information estimating unit that estimates propagation path information of the channels. The apparatus also includes an average value calculating unit that calculates an average value of the propagation path information for each group in a highest layer with the estimate values, and calculates the estimate values used in each layer based on an average value of a layer immediately above to calculate an average value of the propagation path information for each group in other layers with the estimate values of the each layer; and a feedback unit that feeds back an average value acquired in each group as feedback information. | 2009-04-09 |
| 20090092199 | Estimating frequency offset at a subscriber station receiver - A method and system of estimating frequency offset at a subscriber station is disclosed. One method includes the subscriber station receiving a composite signal, wherein the composite signal includes multi-carrier signals transmitted from a plurality of base stations. The subscriber station selects a first pair of multi-carrier symbols of the composite signal, wherein each multi-carrier symbol of the first pair of multi-carrier symbols includes a pilot sub-carrier having a common sub-carrier index. The subscriber station selects a second pair of multi-carrier symbols of the composite signal, the second pair having different symbol indices than the first pair, but having a same symbol index separation, wherein each of the multi-carrier symbols of the second pair of multi-carrier symbols includes a pilot sub-carrier having a second common sub-carrier index. The subscriber station estimates a phase based on a first sum of complex conjugate products between received symbols on the pilot sub-carriers of the first pair of multi-carrier symbols, and/or based on a second sum of complex conjugate products between received symbols on the pilot sub-carriers of the second pair of multi-carrier symbols. The subscriber station provides the phase to a filter of a frequency tracking loop of the subscriber station. | 2009-04-09 |
| 20090092200 | DELAY PROFILE GENERATOR - A delay profile generator that includes a delay profile generating component, a delay profile extracting component, an integrating component, a comparing component and a correcting component, is provided. The integrating component, in the delay profile extracted by the delay profile extracting component, integrates a signal component of a delay profile of a first time period, and integrates a signal component of a delay profile of a second time period that does not overlap the first time period. The comparing component compares integration values of the two time periods obtained by the integrating component. The correcting component corrects a time position of the delay profile window on the basis of results of comparison of the comparing component. | 2009-04-09 |
| 20090092201 | Rate-adaptive multiple input/multiple output (MIMO) systems - A rate-adaptive method of communicating over a multipath wireless communication system uses multiple links such that each end of a link uses multiple transmit and receive antennas. A number of independent streams that are to be transmitted for each link is determined based on an overall system performance measure. In addition, the system may also jointly determine the best modulation, coding, power control, and frequency assignment for each link, based on an overall system performance measure. In OFDM systems, the number of independent streams, as well as the modulation, coding, and power control, may be determined on a tone-by-tone basis based on an overall system performance measure. | 2009-04-09 |
| 20090092202 | METHOD AND APPARATUS FOR ADJUSTING UPLINK DATA RATE IN A MOBILE COMMUNICATION SYSTEM - A method and UE apparatus are provided for adjusting an uplink data rate by a User Equipment (UE) in a mobile communication system. The method includes determining if a current state of a buffer is an empty state or a non-empty state; when the current buffer state is the non-empty state, comparing a ratio of a total of transmission data currently stored in the buffer to a total of Transport Formats (TFs) allocated during a predetermined number n of subframes with a predetermined threshold; setting indication information indicating satisfaction/non-satisfaction (‘happy bit(s)’) of an uplink data rate according to the comparison result; and transmitting the set indication information to a Node B. The UE apparatus comprises a multiplexing/demultiplexing device, a HARQ processor, a controller to set information indicating satisfaction/non-satisfaction in accordance with pre-set rules, an exemplary set of which is also provided. | 2009-04-09 |
| 20090092203 | ADAPTIVE SELF-QUIETER SUPPRESSION FOR OFDM WIRELESS COMMUNICATION SYSTEMS - Various embodiments to provide cancellation techniques that can be used to address the self-quieter problem are described. For example, a receiver that includes a tone selector and a self-quieter suppressor is provided. The tone selector ( | 2009-04-09 |
| 20090092204 | DETECTION CIRCUIT AND DETECTION METHOD OF CARRIER OFFSET - A carrier offset detection circuit is offered, which is provided to a demodulation circuit which demodulates a received signal subjected to FSK (Frequency Shift Keying) modulation, and which detects the offset of the carrier frequency between the transmitting side and the receiving side. A zero-crossing detection unit receives a digital base band signal indicating the level of the frequency shift (frequency deviation) of the received signal using the carrier frequency on the receiving side as a reference frequency, and detects a zero-crossing point of the base band signal and a base band signal obtained by delaying the former base band signal by one symbol, which occurs in a preamble period. A carrier offset detection circuit sets the offset value of the carrier frequency to the value of the base band signal at a timing of the zero-crossing point thus detected. | 2009-04-09 |
| 20090092205 | TABLE DATA GENERATION DEVICE AND METHOD - A table data generation device includes: a setting data storage section that stores setting data of a receiver for receiving broadcast waves; a bit width specification section that specifies a bit width from a reference position of the setting data; a number-of-shifts specification section that specifies a number of shifts of the setting data; and a table data generator that generates table data for the setting data by shifting the specified bit width of the setting data by the specified number of shifts. | 2009-04-09 |
| 20090092206 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD USING PLURAL COMMUNICATION CHANNELS HAVING DIFFERENT BANDWIDTHS - A wireless communication apparatus includes a measuring unit, a matched filter, and a control unit. The measuring unit measures an electric power of a received signal. The matched filter is capable of operating as a first filter and a second filter for the received signal. The first and second filters detect a frame in a first and second communication channel, respectively. The second communication channel uses a frequency band including a frequency bands used in the first and third communication channel. The control unit determines whether or not the frame exists in the third communication channel according to a detection result of the measuring unit and the matched filter. The control unit operates the matched filter as the first filter when the frame exists in the third communication channel and operates the matched filter as the second filter when the frame does not exist in the third communication channel. | 2009-04-09 |
| 20090092207 | Automatic Gain Control Apparatus - An automatic gain control apparatus that can prevent jumps in the gain coefficient when the gain coefficient is altered, due to a sharp change in the level of the received signal before and after the alteration, having a mean square circuit ( | 2009-04-09 |
| 20090092208 | Decoding of forward error correction codes in the presence of phase noise - A communication receiver includes a front end, which is arranged to receive a Radio Frequency (RF) signal, which includes modulated symbols carrying data that have been encoded by a block Forward Error Correction (FEC) code. The front end converts the RF signal to a sequence of soft received symbols, wherein the soft received symbols are subject to distortion by at least first and second noise components having respective at least first and second statistical distributions. A metric calculation unit is arranged to process the soft received symbols so as to extract parameters indicative of the at least first and second statistical distributions, and to compute FEC metrics based on the extracted parameters. A FEC decoder is arranged to accept the FEC metrics as input, and to process the metrics in an iterative FEC decoding process so as to decode the FEC code and reconstruct the data. | 2009-04-09 |
| 20090092209 | Combined channel coding and space-block coding in a multi-antenna arrangement - Enhanced performance is achieved by combining channel coding with the space-time coding principles. With K synchronized terminal units transmitting on N antennas to a base station having M≧K receive antennas, increased system capacity and improved performance are attained by using a concatenated coding scheme where the inner code is a space-time block code and the outer code is a conventional channel error correcting code. Information symbols are first encoded using a conventional channel code, and the resulting signals are encoded using a space-time block code. At the receiver, the inner space-time block code is used to suppress interference from the other co-channel terminals and soft decisions are made about the transmitted symbols. The channel decoding that follows makes the hard decisions about the transmitted symbols. Increased data rate is achieved by, effectively, splitting the incoming data rate into multiple channels, and each channel is transmitted over its own terminal. | 2009-04-09 |
| 20090092210 | System and Method of Real Time Synchronization through a Communication System - A communication system, network, interface, and port architecture are provided for transferring data via a network. The network can be configured by connecting ports in a daisy chain arrangement to achieve a ring architecture or topology. The network transmits data according to a specific protocol. A first port transmits frames containing frame count information which is divided into several pieces, with each piece being transmitted in a single frame. A second port receives the frames, stores them in a frame buffer, and reassembles the frame count information from a plurality of frames. | 2009-04-09 |
| 20090092211 | Method and apparatus for adjusting serial data signal - A method for adjusting a serial data signal having multiple sets of bits includes the following steps. First, one set of bits in the serial data signal is over-sampled to generate a first set of over-sampled bits. Next, every adjacent two bits of the first set of over-sampled bits are compared to generate one set of edge bits. Then, a delay operation is determined according to the set of edge bits. Afterwards, a displacement operation is executed on next sets of bits in the serial data signal according to the delay operation. | 2009-04-09 |
| 20090092212 | CLOCK EMBEDDED DIFFERENTIAL DATA RECEIVING SYSTEM FOR TERNARY LINES DIFFERENTIAL SIGNALING - A clock embedded differential data receiving system for ternary lines differential signaling. The clock embedded differential data receiving system includes a monitoring portion which monitors voltage levels of first, second and third transfer signals to generate a clock signal, a first pre-data and a second pre-data, a data generating portion which detects the first pre-data and the second pre-data in response to a sampling control signal, and generates an output data group with decoding of the first pre-data and the second pre-data, and a timing controller to delay the transition time point of the clock signal with a delay phase which generates the sampling control signal. | 2009-04-09 |
| 20090092213 | Frequency Hold Mechanism in a Clock and Data Recovery Device - A system and method are provided for holding the frequency of a non-synchronous communication signal in a clock and data recovery (CDR) device frequency synthesizer. The method initially acquires the phase of a non-synchronous first communication signal having a first frequency, and divides a first synthesized signal by a selected frequency ratio value, creating a frequency detection signal having a frequency equal to a reference signal frequency. In response to losing the first communication signal and subsequently receiving a second communication signal with a non-predetermined second frequency, the frequency ratio value is retrieved from memory based upon the assumption that the second frequency is the same, or close to the first frequency. Using a phase-frequency detector (PFD), the reference signal, and the frequency ratio value, a second synthesized signal is generated having an output frequency equal to first frequency. Using a rotational frequency detector (RFD), the second communication signal, and the second synthesized signal, a second synthesized signal is generated having an output frequency equal to second frequency. | 2009-04-09 |
| 20090092214 | CLOCK CIRCUIT WITH CLOCK TRANSFER CAPABILITY AND METHOD - An apparatus including a multiplexer configured to provide an output clock selected from a source clock, a destination clock, and a transition clock is provided. The apparatus further includes a phase difference calculation module configured to calculate a phase difference between the source clock and the destination clock and a clock generation module configured to generate a plurality of clocks. The apparatus further includes a clock selection module configured to select one of the plurality of clocks as the transition clock and a control circuit configured to provide: (1) a signal to the clock selection module for selecting one of the plurality of clocks as the transition clock based on the phase difference between the source clock and the destination clock and (2) a signal to the multiplexer to provide as the output clock one of the source clock, the destination clock, or the transition clock. | 2009-04-09 |
