46th week of 2008 patent applcation highlights part 29 |
Patent application number | Title | Published |
20080279143 | METHOD FOR SUPPORTING SHORT LATENCY DATA TRANSMISSION IN A MOBILE COMMUNICATION SYSTEM - A method for supporting short latency data transmission in a mobile communication system is provided. A frame is divided into an uplink subframe and a downlink subframe. Each of the uplink and downlink subframes includes at least one zone for the short latency data transmission and each of the at least one zone includes a first channel for indicating data resource assignment, a second channel over which to transmit data, or a third channel for feedback signal reception. The method includes indicating a location and a size of the second channel using the first channel included in any one of the at least one zone by a transmitting end, transmitting data over the second channel, and receiving feedback information for the data, which has been transmitted over the second channel, over the third channel. | 2008-11-13 |
20080279144 | WIRELESS ACCESS NETWORK SYSTEM, MANAGEMENT DEVICE, AND RESOURCE MANAGEMENT METHOD - A wireless access network system includes a wireless access network device and a management device. A resource of the wireless access network device is shared by a plurality of common carriers. The management device stores shared information defining a common carrier authorized to use a resource in shared information memory, and determines whether or not a call requesting to capture a resource is permitted to use the resource by referring to the shared information in the shared information memory. | 2008-11-13 |
20080279145 | Aggregated harq report - A system and method include a base station configured to provide centralized data transmission scheduling for at least one relay operatively connected to the base station configured to provide centralized data transmission scheduling for at least one relay operatively connected to the base station in a point-to-point connection and configured to provide centralized data transmission scheduling for at least one mobile station operatively connected to the relay in a point-to-multipoint connection. The method efficiently reports ACKs/NAKs for a centralized scheduler wireless system that uses tunneling for data transmission and, in order to reduce a usage of bandwidth for reporting. The system and method also perform an aggregation via coding of ACK/NAK channels. | 2008-11-13 |
20080279146 | ESCAPE MECHANISM FOR A WIRELESS LOCAL AREA NETWORK - A method for performing frequency selection escape in wireless communications is disclosed. The method includes receiving an activation trigger, determining whether the activation trigger has persisted for a predetermined period of time, determining a list of candidate channels; selecting a channel from the candidate list, and evaluating the selected channel against predetermined criteria, the predetermined criteria being related to the activation trigger. If the selected channel meets the predetermined criteria, then an access point (AP) is disassociated from all stations communicating with the AP; and the AP is changed to the selected channel. If the selected channel does not meet the predetermined criteria, then the selected channel is removed from the candidate list; and the selecting of a channel is repeated if there are additional candidate channels. | 2008-11-13 |
20080279147 | Spectrum auction and sharing on wireless clients - Methods and apparatus to enable spectrum auctioning, allowing a user to gain access to otherwise unavailable spectrum is disclosed. Spectrum providers may have the exclusive rights to the spectrum, but these providers can allow other users to access the spectrum in certain situations, for example, limited time use without restrictions, or use based on interference constraints. Software Defined Radio (SDR) may be employed to allow a wireless user to bid for spectrum usage when a wireless network is otherwise unavailable to them. | 2008-11-13 |
20080279148 | TDS-OFDMA COMMUNICATION SYSTEM USER IDENTIFICATION - In a TDS-OFDM communications system for uplink wireless communication multiple accesses through sub-channelization, the system comprising: a plurality of users with each user using a portion of available time-frequency radio resources to achieve orthogonal multiple access; a plurality of available bandwidth, wherein the available bandwidth is divided into multiple sub-bands; at least one the sub-carrier in each sub-band. Inside the sub-band for each user, at least one guard sequence, being used as the guard interval between transmitted symbols. | 2008-11-13 |
20080279149 | Method for Outputting a Useful Data Stream and Communications Terminal for Receiving and for Outputting a Useful Data Stream - A method and a communication terminal for emitting a data flow during the changeover between a first transmission path and a second transmission path are provided. A receiving pause for the data flow occurs in a receiver during the changeover between a receiving end of a first partial data flow of the first transmission path and a receiving beginning of a second partial data flow of the second transmission path, and the data flow is emitted on the receiver side. When the data flow is emitted, the receiving pause is filled with additional data, the additional data being produced previously from the first partial data flow received by means of the transmission path. | 2008-11-13 |
20080279150 | METHOD FOR HANDOVER IN WIRELESS COMMUNICATIONS NETWORK COMPRISING A NUMBER OF SUB-NETWORKS - The present invention discloses a method for carrying out a handover process in a wireless network, wherein the wireless network comprises at least a first and a second base stations belonging each to a different subnet associated of that wireless network and communicating through a first and a second gateways or foreign agents, respectively, and wherein the first base station is used as a serving base station currently in communication with at least one mobile subscriber station (MS). The method provided comprises a step of determining a traffic conveying entity as an intermediate anchoring point, and when the MS moves to a second subnet which comprises the second base station, a path is established for conveying traffic to/from that MS from/to a remote destination. The path comprises the intermediate anchoring point and the first gateway (or the first foreign agent). | 2008-11-13 |
20080279151 | METHOD AND DEVICE FOR PROCESSING DATA AND COMMUNICATION SYSTEM COMPRISING SUCH DEVICE - A method and a device for processing data are provided, the device includes a first network element sends a message to a second network element thereby informing the second network element about a change of attachment of a third network element. | 2008-11-13 |
20080279152 | METHOD AND APPARATUS FOR PERFORMING POWER CONSUMPTION BASED HANDOVER BETWEEN HYBRID NETWORKS - Provided are a method and apparatus for performing power consumption based handover between hybrid networks. The method includes listing candidate networks based on a traffic class and terminal power consumption expected for each of the hybrid networks, and selecting a network for the handover according to the traffic class and a user preference from among the listed candidate networks. Accordingly, power can be saved, and simultaneously a network can be effectively selected. | 2008-11-13 |
20080279153 | FACILITATING MOBILITY BETWEEN MULTIPLE COMMUNICATION NETWORKS - Various embodiments are described to enable improved inter-network/inter-technology handover of mobile devices. A network device ( | 2008-11-13 |
20080279154 | METHOD FOR DETERMINING WHEN A COMMUNICATION DEVICE SHOULD RATE SHIFT OR ROAM IN A WIRELESS ENVIRONMENT - Methods for improving communication performance in a wireless communication system where the wireless communication system has at least one mobile wireless communication device and a plurality of transmitter/receiver sites. The transmitter/receiver sites have a geographic area, defined as a cell, within which the mobile wireless communication devices can communicate with at least one of the transmitter/receiver sites. The methods determine when the mobile wireless communication device should rate shift or roam based on connection quality measurement data or position information such as GPS. In one method, the measurement data is subjected to configurable parameters to create a functional relationship value that is recorded. The recorded functional relationship values are trended and extrapolated to determine whether a rate shift or roam should be performed. In a second method, the measurement data taken prior to a communication connection failure is stored in at least one data vector with there being at least one data vector for each rate shift and one for roam. A functional relationship utilizing current measurements, last data rate, and the respective data vectors determines whether a rate shift or roam should be performed. In a third method, the position information for the wireless communication device is compared to at least one transmitter/receiver site and a determination is made as to the optimal transmitter/receiver site for communication. | 2008-11-13 |
20080279155 | Adaptive Scheduling in a Wireless Network - A method of adaptively scheduling communications in a wireless mesh network including a plurality of network nodes includes generating a network routing scheme based on a topology of the wireless mesh network, generating a communication schedule for the wireless mesh network, and automatically updating the communication schedule in response to detecting a change in a transmission requirement of at least one of the plurality of network nodes. The act of generating a communication schedule includes defining a communication timeslot of a predefined duration and defining a plurality of superframes as repeating cycles of a certain number of consecutively scheduled communication timeslots. | 2008-11-13 |
20080279156 | ORTHOGONAL HADAMARD CODE BASED SECONDARY SYNCHRONIZATION CHANNEL - A secondary synchronization channel (S-SCH) for E-UTRA downlink is applied to any orthogonal frequency division multiple access (OFDMA) based system to reduce interference on S-SCHs among sectors of the same Node-B in an evolved universal terrestrial radio access (E-UTRA) system. | 2008-11-13 |
20080279157 | Resource allocation in wireless communication systems - A method and system wherein the coverage area of a plurality of base stations may be evaluated with respect to noise rise and power for assignment of system resources is disclosed. Path loss is measured to determine candidate base stations and at least one timeslot is selected from within the candidate base stations for optimization of the uplink and downlink. | 2008-11-13 |
20080279158 | COMMUNICATION DEVICE, METHOD FOR ESTABLISHING A COMMUNICATION CONNECTION AND METHOD FOR USING A COMMUNICATION CONNECTION - A communication device including a communication connection establishing circuit configured to establish an ad hoc network communication connection between the communication device, a second communication device and a third communication device, a generating circuit configured to generate encryption parameters to be used by the second communication device and the third communication device for encrypting and decrypting data transmitted between the second communication device and the third communication device via the communication connection when the first communication device has left the communication connection, a signaling circuit configured to signal the encryption parameters to the second communication device and the third communication device, and a disconnection circuit configured to remove the communication device from the communication connection. | 2008-11-13 |
20080279159 | METHODS AND APPARATUS FOR EFFICIENT MPEG TRANSMISSION OVER 802.11 - In one embodiment, a method includes characterizing a first packet of a video stream as being associated with a first frame type, wherein the video stream is arranged to be transmitted on a wireless local area network. The method also includes processing at least the first packet of the video stream as being associated with the first frame type if the first packet of the video stream is characterized as being of the first frame type. | 2008-11-13 |
20080279160 | SYSTEM AND METHOD FOR WIRELESS COMMUNICATION HAVING A DEVICE COORDINATOR SELECTION CAPABILITY - A system and method for wireless communication having a device coordinator selection capability are disclosed. In one aspect, the method comprises determining a coordinator priority of each device based on a static priority table, the table assigning a priority to each type of devices. The method further comprises selecting a first device among the plurality of devices as the coordinator based at least in part on the coordinator priority of each device, and a coordinator candidate from the plurality of devices except the current coordinator, based on the coordinator priority of each device and probing results. | 2008-11-13 |
20080279161 | Modifying remote service discovery based on presence - Modifying remote service discovery based on presence involves identifying service discovery data using ad-hoc, peer-to-peer, service discovery protocols of a local network. The service discovery data is aggregated via an entity of the local network. Presence data associated with a remote device located outside of the local network is identified and the aggregated service discovery data is altered based on the presence data. The altered aggregated service discovery data is made available to the remote device using out-of-band communications. The out-of-band communications are different from the service discovery protocols of the local network. | 2008-11-13 |
20080279162 | Shared processing between wireless interface devices of a host device - An integrated circuit includes a first wireless interface circuit that transceives first packetized data between a host module and a first external device in accordance with a first wireless communication protocol, wherein the first wireless interface circuit includes a first processing module that processes the first packetized data. A second wireless interface circuit, coupled to the first wireless interface device, transceives second packetized data between the host module and a second external device in accordance with a second wireless communication protocol, wherein the second wireless interface circuit includes a second processing module that processes the second packetized data, wherein the second wireless interface circuit is operable to assign a first processing task to the first processing module and wherein the first processing task relates to the processing of the second packetized data. | 2008-11-13 |
20080279163 | Cooperative transceiving between wireless interface devices of a host device with acknowledge priority - A wireless communication device includes a host module. A first wireless interface device transmits a first outbound packet in accordance with a first wireless communication protocol at a first power level and a first rate during a first time interval and that transmits a second outbound packet at a second power level and a second rate during a second time interval, wherein the first power level is less than the second power level and wherein the second rate is less than the first rate. A second wireless interface device transceives data between the host module and a second external device during the second time interval in accordance with a second wireless communication protocol. An antenna section provides at least one radio frequency communication path between the first wireless interface device and the first external device and between the second wireless interface device and the second external device. | 2008-11-13 |
20080279164 | METHOD FOR CONNECTING TO A WIRELESS NETWORK - The present invention provides a method for connecting with a wireless network device. The method includes following steps: upon configuring the wireless network device, executing a first target procedure to connect the wireless network device with the terminal device; executing a second target procedure, allowing the sharing device to be searched by the wireless network device according to at least one target signal; executing a third target procedure to select a target sharing device corresponding to the wireless network device according to the target signal; and connecting wirelessly the wireless network device with the target sharing device. | 2008-11-13 |
20080279165 | MULTI-CHANNEL INTER BASE-STATION COMMUNICATION - The invention relates generally to communication systems and in particular to radio frequency (RF) architectures. Some embodiments of the invention are directed towards a multi-channel inter-BS communication system. The multi-channel inter-BS communication system includes a plurality of co-existing wireless regional area network (WRAN) cells, wherein each of the plurality of co-existing WRAN cells includes a plurality of data frames and at the end of each of the plurality of data frames is a slotted co-existence window. Additional embodiments of the invention include CB frames, fixed-slot host scheduling and modulo scheduling. | 2008-11-13 |
20080279166 | WIRELESS-AWARE NETWORK SWITCH - An application-specific integrated circuit and related network switch are disclosed. The integrated circuit includes switch circuitry for receiving a 802.11 wireless data frame and forwarding it to a predetermined port. Inspection circuitry is provided for inspecting attributes of the data frame. Decision circuitry is provided for instructing the switch circuitry to forward the data frame based on the attributes, both 802.3 wired and 802.11 wireless. | 2008-11-13 |
20080279167 | RESOURCE MANAGEMENT FOR AD HOC WIRELESS NETWORKS WITH CLUSTER ORGANIZATIONS - An initiator node in a local cluster included in a wireless network receives an admission request to execute an application comprising a set of tasks. If the initiator node is unable to map the set of tasks to nodes included in the local cluster, the local cluster head node forwards the admission request to the cluster head node of successive clusters in the wireless network in order to have at least one node in each of the successive clusters send resource availability information to the initiator node. The initiator node attempts to map the set of tasks to a subset of the nodes from which resource availability information has been received. This is repeated until the initiator node is able to map the set of tasks to a subset of the nodes in the wireless network or until there are no additional clusters to forward the admission request to. | 2008-11-13 |
20080279168 | SYSTEM AND METHOD FOR BROADCASTING OVERHEAD PARAMETERS IN POOR COVERAGE REGIONS - To improve WWAN coverage, an access node broadcasts overhead messages on a first channel covering a first channel environment and a second channel covering a second channel environment within a coverage region. The overhead messages carry network overhead parameters for allowing wireless mobile devices to acquire and maintain traffic channels within the cellular system. The overhead message channels are configured so that a user perceives uninterrupted wireless services while moving through different channel environments in the coverage region. In one embodiment, the overhead message channels are separate physical channels configured with different broadcast parameters to provide coverage in different environments. In another embodiment, the overhead parameter information is segregated into base and extended components that are encoded and layer modulated onto separate logical channels. Using layered modulation, wireless mobile devices can receive base components in poor coverage regions. The base components include overhead parameters for acquiring a WWAN channel. | 2008-11-13 |
20080279169 | Methods and Apparatuses for Intrasystem and Intersystem Sliding Intermediate Frequency Transception - Systems and methods according to the present invention provide methods for wireless communications and devices associated therewith which vary the intermediate frequency based upon the particular channel and/or system with which a wireless station is communicating. Tailoring the selection of an intermediate frequency in this way, enables signal energy associated with images created by heterodyne processing to be more easily removed. | 2008-11-13 |
20080279170 | METHOD AND APPARATUS FOR MULTIPLEXING CDM PILOT AND FDM DATA - Techniques for sending control information in a wireless communication system are described. In an aspect, a user equipment (UE) may send data for control information in a resource block with frequency division multiplexing (FDM) and may send pilot in the resource block with frequency-domain code division multiplexing (CDM). The UE may determine multiple groups of subcarriers to use to send data in multiple symbol periods of the resource block based on a predetermined pattern or a pseudo-random hopping pattern. Each group may include consecutive subcarriers to support localized FDM. The multiple groups may include different subcarriers to provide frequency diversity and possibly interference averaging. The UE may send modulation symbols for data (e.g., in the time domain) on the multiple groups of subcarriers in the multiple symbol periods. The UE may send a reference signal sequence for pilot on multiple subcarriers in each symbol period for pilot. | 2008-11-13 |
20080279171 | METHOD AND APPARATUS FOR LAYER 2 ARQ FOR PACKETS - An Automatic Repeat reQuest (ARQ) method in a communication system having a protocol layer structure, in which a Layer 2 (L2) transmitter for generating an upper layer packet in a size suitable for transmission over a radio channel and transmitting the upper layer packet to a lower layer, transmits, to a receiver, polling information representative of an indicator for ordering the generation of a status report, and performs packet ARQ according to whether the status report is received within a predetermined time. The method includes determining whether there is a possibility that upper layer data contained in a packet data unit to be transmitted along with the polling information will cause an upper layer message in the opposite direction; and when there is a possibility that the upper layer data will cause an upper layer message, generating polling information ordering a receiver to wait for a predetermined time after receipt of a packet and to transmit an upper layer packet generated for the waiting time along with a status report, including the polling information in the packet data unit, and delivering the packet data unit to the lower layer. | 2008-11-13 |
20080279172 | Radio Communication Device, Demodulation Method, and Frequency Deflection Correction Circuit - A demodulation section | 2008-11-13 |
20080279173 | Method to Synchronize Receiver's Clock to Transmitter's Clock at Sub-100Nsec | 2008-11-13 |
20080279174 | Method and System for Transmitting Data From a Medium Access Control Device Via a Physical Layer to an Antenna - The invention relates to a system for transmitting data from a medium access control device ( | 2008-11-13 |
20080279175 | Off network mobile to mobile calling using SIP protocol - This invention addresses the need to transport high bit-rate data to multiple users, or between users, over wired and wireless means. Specifically, this disclosure describes a new method of enabling communication from mobile phone to mobile phone when no network services are available as long as radio contact between the mobile handsets is possible by reserving un-assigned timeslots in the medium access control protocol super frame structure. | 2008-11-13 |
20080279176 | BASE STATION SYSTEM AND MOBILE STATION SUPPORTING DTMF PROTOCOL - A protocol is proposed for a mobile station to transmit Dual Tone Multi-Frequency (DTMF) to another mobile station. When a user presses a key on a source mobile station, which is connected to a target mobile station, DTMF data are transmitted via a digital channel to a base station first. Instead of converting the received DTMF data to a corresponding analog voice to the target mobile station, the base station forwards the DTMF data to the target station via a digital channel. The target mobile station parses the DTMF data and activates certain operation in response to the key pressed by the user. | 2008-11-13 |
20080279177 | Conjoined Telephony Communication System - There is provided a communication method for the receiving a first call-initiation request, generating a second call-initiation request in response to the first call-initiation request and generating a third call-initiation request in response to the first call-initiation request. Moreover, there is provided a communication method comprising receiving call-session information, separating the call-session information into core audio information and into supplementary information, routing core audio information on a first path and routing supplemental information on a second path. Further, there is provided a communication method, comprising receiving core audio information on a first communication path, receiving audio-enhancement information on a second communication path, uncompressing audio-enhancement information, combining core audio information with audio-enhancement information to generate combined audio information and providing combined audio information to audio terminals. | 2008-11-13 |
20080279178 | PORT REDUCTION FOR VOICE OVER INTERNET PROTOCOL ROUTER - An apparatus and method for increasing available ports on a voice router is provided. A first gateway and a second gateway are assigned a single port number for a data stream, the direction of packet flow is identified to determine a destination gateway. The destination gateway is one of the first and second gateways, depending on the direction of the packet flow. The packets are then forwarded to the destination gateway. The voice router can further consolidate RTCP streams from a plurality of gateways into a single port on the voice router. | 2008-11-13 |
20080279179 | Ethernet Based Network for Distributing Ip and Non-Ip Signals - The present invention relates to a system and a method for distributing both IP signals and non-IP signals in an Ethernet based network, wherein the Ethernet based network comprises UTP cabling comprising a number of wires, the method comprises distributing said non-IP signals through a signal path based on wires comprised in said cabling and not being used for distributing said IP signals. The invention further relates to a gateway, a router and a switch for receiving both IP signals and non-IP signals, processing said IP signals and non-IP signals and transmitting said processed IP signals and non-IP signals via the Ethernet based network. | 2008-11-13 |
20080279180 | Managing a Node that Provides Access to Both Broadband and Narrowband Service - The present invention relates to a node, a line board arrangement and a management system in a telephony and data communication systems. The solution is to provide virtual combined ports in a Multi Service Access Node in a flexible way, by combining two standard physical line boards, one broadband line board and one narrowband line board to one virtual line board. The virtual combined port will be one physical access port, providing both narrowband services and DSL broadband services to a customer and subscriber. | 2008-11-13 |
20080279181 | Packet Transmission Method and Packet Transmission Device - A packet transfer method in a network apparatus that transfers packets is disclosed. In the packet transfer method, a sending side apparatus generates two copies of a send packet, provides a sequence number identifying the same sending sequence to each of the copied packets, provides an identifier corresponding to a send/receive pair to each of the copied packets to send the packets, and a receiving side apparatus receives each of the packets with two receiving units; recognizes the identifiers each corresponding to a send/receive pair; identifies packets having the same information and the sequence based on the sequence number when the identifiers are the same; selects one of the packets of the same sequence so as to send the packet downstream, and discards another packet, wherein, when only one of the packets of the same sequence arrives, the arriving packet is sent downstream. | 2008-11-13 |
20080279182 | Method and Apparatus for the Use of Network Coding in a Wireless Communication Network - According to a method and apparatus taught herein, a network node includes a receiver circuit that determines soft values for received packets corresponding to the information bit groups associated with network coding operations, where the soft values are determined for each information bit group based on joint probabilities of the information bits within the information bit group. For example, first soft values are determined for the information bit groups in a first (received) constituent packet and second soft values are likewise determined for the information bit groups in a network-coded (received) packet that depends on the first constituent packet and a second constituent packet. Third soft values are generated for the information bit groups of the second constituent packet based on jointly evaluating the first and second soft values. | 2008-11-13 |
20080279183 | System and method for call routing based on transmission performance of a packet network - A system and method that establishes a phone call over a packet network. The process may include receiving a call request from an originating call device on a packet network to call a terminating call device. A first transmission path may be determined between the originating and terminating call devices. Status of a terminating segment at a first terminating trunk may be determined and, if the status of the terminating segment at the first terminating trunk is within a first range, a call between the originating and terminating call device may be established via the first terminating call trunk. Otherwise, if the status of the terminating segment at the first terminating trunk is within a second range, a second transmission path via a second terminating trunk between the originating and terminating call devices may be made. | 2008-11-13 |
20080279184 | Method for Data Transmission and a Switching Apparatus - A method for transmitting data, wherein correspondence information between service instances and multicast addresses is configured in a network, includes: after having received a service instance data message to be transmitted through broadcast mechanism, a node determining the service instance to which the service instance data message belongs, searching the multicast address corresponding to the service instance to which the service instance data message belongs from the correspondence information, and transmitting the service instance data message by using the found multicast address as a destination address. The network may be the Ethernet or an IP network. The multicast address may be a multicast MAC address or a multicast IP address. | 2008-11-13 |
20080279185 | ENHANCED PACKET CLASSIFICATION - A method for classifying a data packet containing a header is provided. The method may comprise parsing the header of a data packet into header elements. Rules in secondary lookup tables generated from a primary lookup table may be accessed. The respective header elements of the data packet may be compared to the respective fields of each of the secondary lookup tables, and rule results for each of the secondary lookup tables in a combinable format may be generated. In another embodiment, a method for generating secondary lookup tables from a primary lookup table is provided. The method may comprise accessing a primary lookup table defining packet classification rules and generating multiple secondary lookup tables from the primary lookup table. For each secondary lookup table, a selection of classification rules and a selection of fields of the multiple fields based on a rule set identifying predefined entries may be extracted. | 2008-11-13 |
20080279186 | System and Method for Communication of Uncompressed Visual Information Through a Network - DisplayPort micropackets of uncompressed visual information are adapted to conventional network infrastructure with a switch having DisplayPort ports, network ports and a packet converter. The packet converter encapsulates DisplayPort packets for communication through network ports and extracts DisplayPort packets from network packets for communication through DisplayPort ports. An address resolution table associates the switch ports with each other and with a packet converter operation by using a control field that defines the packet converter operation for information received at each port, such as encapsulation, extraction or native switching. | 2008-11-13 |
20080279187 | PACKET STRUCTURE FOR A MOBILE DISPLAY DIGITAL INTERFACE - A packet structure for a Mobile Display Digital Interface (MDDI) includes a flexible sub-frame length to efficiently transmit large packets. A windowless video stream packet avoids repetitive transmissions of video packets when some parameters are unchanged, saving bandwidth. An enhanced reverse encapsulation packet combines the feature of a separate round trip delay packet with a separate reverse encapsulation packet. A link freeze is used to halt a transmission of a data stream at any point in the transmission and resume the transmission by a host. | 2008-11-13 |
20080279188 | Method And Apparatus For Performing Network Processing Functions - A novel network architecture that integrates the functions of an internet protocol (IP) router into a network processing unit (NPU) that resides in a host computer's chipset such that the host computer's resources are perceived as separate network appliances. The NPU appears logically separate from the host computer even though, in one embodiment, it is sharing the same chip. | 2008-11-13 |
20080279189 | Method and System For Controlled Delay of Packet Processing With Multiple Loop Paths - A method and system for introducing controlled delay of packet processing at a network entity using multiple delay loop paths (DLPs). For each packet received at the network entity, a determination will be made as to whether or not processing should be delayed. If delay is necessary, one of a plurality of DLPs will be selected according to a desired delay for the packet and a path delay determined for each DLP. Upon completion of a DLP delay, a packet will be returned for processing, an additional delay, or some other action. Multiple DLPs may be enabled with packet queues, and may be used advantageously by security devices, such as Intrusion Prevention Systems (and other packet processing platforms) for which in-order processing of packets may be desired or required. | 2008-11-13 |
20080279190 | Maintaining End-to-End Packet Ordering - A network processor to maintain end-to-end packet ordering by re-ordering the packets processed in an order that is not the same as the order in which the packets are received. A first microblock stores a null value for a status flag corresponding to each packet, a second microblock modifies the null value to a first value or a second value respectively based on whether the packet is processed successfully, and a third microblock retrieves the values stored in the status flags of each packet and re-orders the packets. | 2008-11-13 |
20080279191 | Method and Apparatus of Delivering Protocol Data Units for a User Equipment in a Wireless Communications System - A method of delivering protocol data units (PDUs) for a user equipment in a wireless communications system includes receiving a reordering PDU from a protocol entity. The reordering PDU has a PDU sequence, A first PDU of the PDU sequence is a segment of a PDU having a segmented side at the front, and a last PDU of the PDU sequence is a complete PDU. The first PDU is concatenated with a previously stored PDU segment to form a complete PDU for being delivered to an upper layer entity of the protocol entity when the reordering PDU and the previously stored PDU segment are consecutive. All PDUs other than the first PDU in the reordering PDU are delivered to the upper layer entity. | 2008-11-13 |
20080279192 | Method and Apparatus of Delivering Protocol Data Units for a User Equipment in a Wireless Communications System - A method of delivering protocol data units (PDUs) for a user equipment in a wireless communications system includes receiving a reordering PDU from a protocol entity. The reordering PDU has a PDU sequence. A first PDU of the PDU sequence is a segment of a PDU having a segmented side at the front, and a last PDU of the PDU sequence is a segment of a PDU having a segmented side at the end. The first PDU and a previously stored PDU segment are discarded when the reordering PDU and the previously stored PDU segment are not consecutive. All PDUs other than the first PDU and the last PDU in the reordering PDU are delivered to an upper layer entity of the protocol entity and the last PDU is stored. | 2008-11-13 |
20080279193 | Method and Apparatus of Delivering Protocol Data Units for a User Equipment in a Wireless Communications System - A method of delivering packet data units (PDUs) for a user equipment in a wireless communications system includes receiving a reordering PDU having at least one upper layer PDU from a protocol entity, determining whether the at least one upper layer PDU are segmented for reassembling with a previously stored segment of a upper layer PDU according to a segmentation indication message corresponding to the reordering PDU, and delivering the at least one PDU to an upper layer protocol entity and discarding the previously stored segment when the at least one upper layer PDU are all not segmented PDUs. | 2008-11-13 |
20080279194 | Method and Apparatus of Improving Reset of Evolved Media Access Control Protocol Entity in a Wireless Communications System - A method of improving reset of an evolved media access control (MAC-ehs) protocol entity for a user equipment of a wireless communications system is disclosed. The MAC-ehs entity includes a plurality of reordering queues and a plurality of reassembly entities. The method includes receiving a reset request for resetting the MAC-ehs entity, delivering all reordering packet data units (PDUs) stored in the plurality of reordering queues to the corresponding reassembly entities for performing a reassembly process to deliver complete upper layer PDUs to an upper layer entity, and discarding all PDU segments still existing in the plurality of reassembly entities. | 2008-11-13 |
20080279195 | Multi-plane cell switch fabric system - Disclosed herewith is a multi-plane cell switch fabric system in which each switching unit functions asynchronously with others. The system executes distribution/restoration operations without lowering the switching capacity to reorder cells that arrive in random order from a plurality of switches just as they were in original flows and packets respectively with a small hardware capacity. In the system, the distribution unit divides each variable length packet addressed to the same destination into fixed length cells and sends those divided cells by a unit of integer multiple of the number of switches. On the other hand, the reordering unit, while holding cells that arrive in random order from each switching unit (switching units | 2008-11-13 |
20080279196 | Differential Forwarding in Address-Based Carrier Networks - The invention relates to enabling differential forwarding in address-based carrier networks such as Ethernet networks. There is described a method of and connection controller for establishing connections ( | 2008-11-13 |
20080279197 | Application level router for routing heterogeneous input to the most appropriate application - A client-agnostic software routing component for routing input data of a type and version to a most appropriate type and version of client application of a family of related applications. The router, rather than the client application, registers as the file extension handler and as the protocol handler, and thus, receives all input data targeting the client applications. On startup, the router creates a list of available client applications, the client versions and types, and versions of input data the clients can handle. On receiving the input, the router determines if the router can parse the version of the input. The router refers to the list of available clients to determine if one or more of the client applications can handle a particular version and type of the input data. After this determination, the router routes the input to the most appropriate client. | 2008-11-13 |
20080279198 | Method for the Transmission of Information in a Communication System Using a Path - A method transmits information in a communication system with a number of nodes. At least one node receives a message including the details of a path, running from a source node, though the at least one node, to a target node. The at least one intermediate node, using the details of the at least one path, stores identification information concerning the nodes, adjacent to the at least one node, along the at least one path and transmits the message further along the at least one path. A node in the communication system is also described. | 2008-11-13 |
20080279199 | Power Line Communication System and Communication Device Used in the System - A lock device having a lever is disclosed, in which the lever is released to rotate a latch bolt only if a correct electronic key is authenticated while the latch bolt is hooked over the lever at normal times. In the lock device of the present invention, having a latch bolt which is placed to rotate for opening a door once an electronic key is authenticated by its recognition or entering a password, the lock device comprises a motor rotated in one direction by a signal input after the electronic key is authenticated; a pinion assembly connected with a rotation axis of the motor and rotated by an operation of the motor; a lever having one end hooked over a projection formed in the latch bolt so as not to rotate the latch bolt at normal times, connected with the pinion assembly, and rotated by rotation of the motor to release binding state of the latch bolt once the electronic key is authenticated; and the latch bolt not rotated at normal times as its projection is hooked over the lever, and rotated as the projection is released by rotation of the lever once the electronic key is authenticated. Therefore, the lock device makes the manufacture easy and improves reliability of the operation. | 2008-11-13 |
20080279200 | User Sensitive Filtering of Network Application Layer Resources - In one embodiment, a method includes receiving authorization data at a local node of a network. The authorization data indicates a particular network address of a different node in the network and an authenticated user ID of a user of the different node. Resource profile data is retrieved based on the user ID. The resource profile data indicates all application layer resources on the network that the user is allowed to access. The particular network address is associated at the local node with the resource profile data for the user. A request from the particular network address for a requested application layer resource on the network is blocked based on the resource profile data associated with the particular network address. | 2008-11-13 |
20080279201 | METHODS, SYSTEMS, AND COMPUTER PROGRAM PRODUCTS FOR SOURCE-AWARE IP ROUTING AT A MEDIA GATEWAY - The subject matter described herein includes methods, systems, and computer program products for source-aware IP routing at a media gateway. According to one aspect, a method for source-aware IP routing at a media gateway is provided. The method includes providing a packet including a layer | 2008-11-13 |
20080279202 | Integrated Gateway for Distributed Home Network and Software Framework Structure for the Same - Disclosed herein are an integrated gateway for a distributed home network and a software framework structure for the same. The integrated gateway includes an input/output interface unit ( | 2008-11-13 |
20080279203 | Method of Operating a Node in a Communications Network - There is described a method of operating a node in a ring network. A first loop avoidance protocol, for example, a Spanning Tree Protocol (STP) is run at the node together with a protocol adaptation process. The protocol adaptation process performs processes that enable the first loop avoidance protocol to run over a second loop avoidance protocol, for example, the Ethernet Ring Protection Protocol (ERP), operating in the ring. This makes it easier for network operators to incorporate in networks running STP, equipment manufactured to run ERP. | 2008-11-13 |
20080279204 | Increasing Reliability and Reducing Latency in a Wireless Network - A mesh communication network for use in, for example, process control plants includes a plurality of network devices transmitting and receiving data according to a network schedule defined as a set of concurrent overlapping superframes, and along a set of graphs defining communication paths between pairs of network devices. A network manager residing in or outside the communication network develops a routing scheme for the network by analyzing the topology of the network and defining a set of graphs for use in routing or transmitting data between various nodes of the network, each graph including one or more communication paths between pairs of network devices. Concurrently or consequently, the network manager defines the network schedule in view of at least transmission requirements, power availability, and signal quality at each network device. If desired, the network manager may begin to define the network schedule upon completing the definition of the graphs of the communication network, so that the network manager may define the network schedule in view both the defined graphs and the transmission, power, etc. parameters associated with each network device. | 2008-11-13 |
20080279205 | Packet preclassification using search tree algorithms - An information packet preclassification system and method are provided. The method receives a packet of information and differentiates the packet into segments. Using a decision tree with multiple levels, segments in the packet are compared to a node at a tree level, where each node includes a plurality of node reference segments and corresponding node comparison operators. The reference segment may be a different segment from the packet, or a predetermined segment value stored in memory. One, or more classification attributes are accessed in response to comparing segments, and the classification attributes are assigned to the packet. Then, the packet is processed in response to the classification attributes. | 2008-11-13 |
20080279206 | Tree-type broadcast system, method of participating and withdrawing tree-type broadcast system, node device, and node process program - A node device having a plural hierarchy levels in a tree-like shape while placing a broadcast device at a top of the levels and connecting the node devices through a communication means, wherein content data is sequentially transferred from the node device at an upper hierarchy level to that at a lower hierarchy level, including:
| 2008-11-13 |
20080279207 | Method and apparatus for improving performance in a network using a virtual queue and a switched poisson process traffic model - A method for improving network performance using a virtual queue is disclosed. The method includes measuring characteristics of a packet arrival process at a network element, establishing a virtual queue for packets arriving at the network element, and modeling the packet arrival process based on the measured characteristics and a computed performance of the virtual queue. | 2008-11-13 |
20080279208 | SYSTEM AND METHOD FOR BUFFERING DATA RECEIVED FROM A NETWORK - A system for buffering data received from a network comprises a network socket, a plurality of buffers, a buffer pointer pool, receive logic, and packet delivery logic. The buffer pointer pool has a plurality of entries respectively pointing to the buffers. The receive logic is configured to pull an entry from the pool and to perform a bulk read of the network socket. The entry points to one of the buffers, and the receive logic is further configured to store data from the bulk read to the one buffer based on the entry. The packet delivery logic is configured to read, based on the entry, the one buffer and to locate a missing packet sequence in response to a determination, by the packet delivery logic, that the one buffer is storing an incomplete packet sequence. The packet delivery logic is further configured to form a complete packet sequence based on the incomplete packet sequence and the missing packet sequence. | 2008-11-13 |
20080279209 | Time-space carrier sense multiple access - A scalable switch, a system of switches and methods, configured to sense a carrier at the output of the respective switch. The invention intelligently, and dynamically, controls the connection of a respective switch input to a respective switch output as a function of a carrier being present, or absent, at a selected output. The present invention provides a switching system that is scalable, and not limited as are Stored Program Control (SPC) type switches. | 2008-11-13 |
20080279210 | Communication Apparatus - A communication apparatus exhibiting improved certainty and stability in communication. In a wireless terminal ( | 2008-11-13 |
20080279211 | METHOD AND APPARATUS FOR PROVIDING PIGGYBACKED POSITIVE ACKNOWLEDGEMENT/NEGATIVE ACKNOWLEDGEMENT FIELD INDICATOR AND A POLLING INDICATOR - A method and apparatus of providing a piggybacked positive acknowledgement/negative acknowledgement (ACK/NACK) (PAN) field indicator (PANI) and a polling indicator are disclosed. A combined field of a PANI bit, a relative reserved block period (RRBP) bit and an EGPRS supplementary polling (ES/P) field may indicate a polling scheme and a presence of a PAN field. Alternatively, the presence of the PAN field in the data block may be indicated by using a specific training sequence. Alternatively, a forward error correction (FEC) coding may be performed on the data block including the header, and the presence of the PAN field may be indicated by scrambling the encoded bits corresponding the header with a specific scrambling sequence. Alternatively, a header check sequence (HCS) may be generated and the presence of the PAN field is indicated by mixing a predetermined sequence with the HCS. | 2008-11-13 |
20080279212 | Communnication system, information management apparatus, information management method, information processing apparatus, and information processing method - In a communication system, an information processing apparatus communicates with an information management apparatus via polling communication. In the information management apparatus, specification information including information specifying a timing condition of polling communication is stored, and the specification information is transmitted to the information processing apparatus in response to a request from the information processing apparatus. Transmission of the specification information is performed each time the request is issued via polling communication by the information processing apparatus when the specified timing condition is met. In the information processing apparatus, if the specification information is received, the timing condition is set such that next polling communication is performed when the time condition specified by the specification information is met. The polling communication is started when the timing condition set by the setting unit is met to request the provision of specification information specifying the timing condition of further next polling communication. | 2008-11-13 |
20080279213 | Random Access Channel Protocol - The present invention provides an improved random access channel protocol, wherein different user elements may be associated with different priority levels. Based on relative priority, the user elements may have different probabilities for deciding when to retransmit a previously transmitted packet upon receiving information from an access point indicating that the packet needs to be retransmitted. A buffer is provided for storing a packet to transmit, and the buffer is associated with a stack counter, which is incremented or decremented to or from a nominal value to determine when to transmit or retransmit the packet stored in the buffer. Based on the relative priority, feedback information from the access point may cause the stack counter for a packet needing to be retransmitted to stay at the nominal value, wherein retransmission will occur at the next available time slot, or it may increase the stack counter by one or more levels. | 2008-11-13 |
20080279214 | Radio Communication Method and Radio Communication Device - A radio communication device includes a beacon reception unit extracting a frame from a received beacon and a frame judgment unit judging whether the extracted frame is one requiring data transmission/reception or one giving notice of a collision with a beacon of another network, a frame constructing unit used when the frame judgment unit has judged that the frame is a collision notification, generating a frame for relaying the collision notification and a movement notification to a new beacon transmission period, and a beacon transmission instruction unit instructing transmission of the frame at the beacon transmission timing. Accordingly, since these notifications can be relayed, all radio communication devices of the same network can move to a new beacon transmission period while avoiding a collision with a beacon from a radio communication device of another network. | 2008-11-13 |
20080279215 | Processing a data stream format for mobile audiovisual reception - The invention relates to a method for reception of a data stream, transmitted in segment in one or several broadcast channels, comprising a reception step for the data in a segment of data stream transmitted by an active broadcast channel. A step for changing reception channel allows switching from the current broadcast channel to a second channel after receipt of the data stream. A listening step on said second channel listens for an event identifying the transmission of the subsequent segment of the data stream and a step for changing reception channel by switching from said second channel to the current broadcast channel or another broadcast channel. | 2008-11-13 |
20080279216 | System and Method of Traffic Management Over Mixed Networks - A method and apparatus is provided of handling modified packets containing additional information regarding source and data type for efficient processing within a mixed network. Incoming and outgoing packets are sent via a dynamic protocol which adapts to circumstances, including the type of network being used, the type of packet being transmitted and the network guidelines. | 2008-11-13 |
20080279217 | Managing Bandwidth Allocation to a Plurality of Subscribers Utilizing Opportunistic Bandwidth - In a resource manager, a method for managing bandwidth allocation to a plurality of subscribers utilizing opportunistic bandwidth including tracking a bandwidth utilization on multiple links, receiving a request for services along one of the links, and selecting a video data rate on the one of the links that meets available bandwidth. | 2008-11-13 |
20080279218 | Abnormal case handling for acknowledged mode transmission and unacknowledged mode transmission - Whenever the Receiver of this invention receives an AMD PDU or a UMD PDU with its “Length Indicator” having an invalid or a reserved value, the Receiver discards such a PDU and treats it as never received. The Receiver may report its receiving status accordingly if a report is required. This invention avoids invoking unnecessary RLC reset procedures and reduces the chance of losing HFN synchronization during AM or UM data transmissions. | 2008-11-13 |
20080279219 | AGGREGATING NETWORK PACKETS FOR TRANSMISSION TO A DESTINATION NODE - A node for transmitting digital data over a network receives a plurality of packet data units and identifies at least two of the packet data units that have the same aggregation identifier. The node then forms an aggregate packet from the packet data units that have the same aggregation identifier and transmits the aggregate packet to a common destination node or nodes. | 2008-11-13 |
20080279220 | PREAMBLE STRUCTURE AND ACQUISITION FOR A WIRELESS COMMUNICATION SYSTEM - Techniques for sending sector/system information in TDM pilots using a hierarchical pilot structure are described. A base station sends multiple sets of bits for the sector/system information in multiple TDM pilots. The set of bits sent in a given TDM pilot may include bits sent in earlier TDM pilots. In one design, the base station generates a first TDM pilot based on a first set of bits, generates a second TDM pilot based on a second set of bits that includes the first set, generates a third TDM pilot based on all bits for the information, and sends the TDM pilots. A terminal performs detection to obtain a first detected value for the first TDM pilot, performs detection based on the first detected value to obtain a second detected value for the second TDM pilot, and performs detection based on the first and second detected values to obtain a third detected value for the third TDM pilot. | 2008-11-13 |
20080279221 | Method for estimating and compensating IQ imbalance in OFDM systems - A method for compensating IQ imbalance is disclosed. First, an OFDM signal is received. The OFDM signal is translated into frequency domain, wherein the translated OFDM signal has N sub-carriers noted as Y(1)-Y(N). The IQ imbalance compensation factor is generated according to the k-th sub-carrier of the translated signal Y(k), the (N−k+2)-th sub-carrier of the translated signal Y(N−k+2), and the complex conjugates thereof. | 2008-11-13 |
20080279222 | DISTRIBUTION OF TRAFFIC ACROSS A COMPUTER NETWORK - A system and method of distributing traffic across a computer network is provided using a relay apparatus. A relay apparatus includes an interface to a communication network, a data store, and a processor. The data store includes data elements associating a first network address of a server to a second network address of the server. The processor is configured to receive a request corresponding to a data element in the data store, use the data element to determine a corresponding server, and forward the request to the server in a manner such that any response to the forwarded request is sent to the relay apparatus. | 2008-11-13 |
20080279223 | Method for Synchronizing Charging Processes Involved in Performance of Service on Network Elements in Communication Network - A control protocol using mechanisms of a transport protocol is used to distribute control messages containing specific dedicated information for each charging process involved in the performance of a service or application to each charging process required in the performance of the service or application. | 2008-11-13 |
20080279224 | Alignment and Deskew For Multiple Lanes of Serical Interconnect - Methods and apparatus are provided for data communication between a transmitter and receiver over a plurality of serial links, which cause the transmitter to send serialized groups of bits down each lane, in such a way that the first bit of each group (each lane) is guaranteed to arrive in the correct order at the receiving end. Various embodiments of the present invention include declaring a budget for the maximum skew between lanes. In such embodiments, subsequent to determining the skew budget between lanes, the data to be transmitted is divided into groups of N bits, where N is any convenient number larger than M times S, with M being the number of lanes and S being the budgeted skew, in bit times. | 2008-11-13 |
20080279225 | Synchronized Receiver - There is provided a method of operating a communications system comprising a transmitting station and a receiving station, the method in the transmitting station comprising encoding a clock signal with data to form encoded signals for transmission; transmitting the encoded signals to the receiving station; the method in the receiving station comprising decoding the encoded signals to extract the clock signal and data; processing the data under the control of the decoded clock signal. The method further comprises, when no data is required to be transmitted to the receiving station, transmitting further encoded signals to the receiving station in order for the receiving station to decode the further encoded signals and extract a clock signal. | 2008-11-13 |
20080279226 | Packet jitter mitigation for bursty transmission systems - Audio packets occupy spaces in a packet stream so as to reduce packet jitter in a receiver. | 2008-11-13 |
20080279227 | Method for Generating Terahertz Electromagnetic Waves by Using Coherent Phonons - In a method for generating a terahertz electromagnetic wave by using coherent phonons in a quantum structure, high density of coherent phonons acting as a radiation source of the terahertz electromagnetic wave are obtained by exciting the inter-band transitions in a quantum structure under the condition that the energy difference between two inter-band transitions in the quantum structure is resonated with the energy of the coherent phonons, and the terahertz electromagnetic wave is generated by the oscillatory polarizations of the coherent phonons. High density of coherent phonons may be created through the elementary excitation generated by using instantaneous laser pulses. A quantum well structure is effective as the quantum structure, and a scattering process of coherent phonon may be suppressed by confining coherent LO phonons in a well layer. Under the condition that the difference of energies between the heavy-hole and light-hole exitons in a quantum well structure agrees with the energy of LO phonons and both the exitons are created simultaneously, high density of coherent phonons may be generated. With this method, a terahertz electromagnetic wave can be effectively and strongly emitted from the coherent phonons. | 2008-11-13 |
20080279228 | Optically Pumped Alkali Laser and Amplifier Using Helium-3 Buffer Gas - In one embodiment, a laser oscillator is provided comprising an optical cavity, the optical cavity including a gain medium including an alkali vapor and a buffer gas, the buffer gas including | 2008-11-13 |
20080279229 | SURFACE EMITTING SEMICONDUCTOR LASER, METHOD FOR FABRICATING SURFACE EMITTING SEMICONDUCTOR LASER, MODULE, LIGHT SOURCE APPARATUS, DATA PROCESSING APPARATUS, LIGHT SENDING APPARATUS, OPTICAL SPATIAL TRANSMISSION APPARATUS, AND OPTICAL SPATIAL TRANSMISSION SYSTEM - A surface emitting semiconductor laser includes a substrate, a lower reflective mirror formed on the substrate, an active layer formed on the lower reflective mirror, an upper reflective mirror formed on the active layer, an optical mode controlling layer formed between the lower reflective mirror and the upper reflective mirror, and a current confining layer formed between the lower reflective mirror and the upper reflective mirror. The active layer emits light. The upper reflective mirror forms a resonator between the lower reflective mirror and the upper reflective mirror. In the optical mode controlling layer, an opening is formed for selectively absorbing or reflecting off light that is emitted in the active layer. The optical mode controlling layer optically controls mode of laser light. The current confining layer confines current that is applied during driving. | 2008-11-13 |
20080279230 | Fabry-perot laser system with phase section, and method of use thereof - A laser having accurately adjustable frequency, the laser including a semiconductor material having a gain region and a phase tuning region, wherein the phase tuning region is coupled to a power source that applies current in order to alter the index of refraction of the phase tuning region. By altering the amount of current applied to the tuning section, the transmission peak of the signal from the laser can be altered. | 2008-11-13 |
20080279231 | Optical limiter - An optical power limiter comprises an input optical transmission element, an output optical transmission element, and a power-limiting element disposed between the input and output elements for transmitting optical signals from the input element to the output element. The power-limiting element comprises an optical-limiting solid mixture containing particles of at least one material that produces reversible thermal changes in response to light above a predetermined optical power level, thereby changing the optical transmission properties of the power-limiting element. | 2008-11-13 |
20080279232 | MULTI-LASER SYSTEM - A multi-laser system including a first laser oscillator for emitting a first laser beam, a second laser oscillator for emitting a second laser beam, a first scanner pair for receiving the first laser beam emitted by the first laser oscillator and deflecting the incident first laser beam to a desired location on a substrate to be processed, a second scanner pair for receiving the second laser beam emitted by the second laser oscillator and deflecting the incident second laser beam to a desired location on the substrate to be processed, and a scan lens for receiving laser beams that have been deflected from the first and second scanner pairs, focusing the received laser beams to spots having predetermined diameters so as to radiate the spots on the substrate. | 2008-11-13 |
20080279233 | STRONG DISTRIBUTED FEEDBACK SEMICONDUCTOR LASER - The present invention relates to a strong distributed feedback semiconductor laser. More specifically, the invention implements a top optical waveguide ( | 2008-11-13 |
20080279234 | Alignment of lasing wavelength with wavelength conversion peak using modulated wavelength control signal - According to one embodiment of the present invention, a programmable light source comprises one or more semiconductor lasers, a wavelength conversion device, and a laser controller. The controller is programmed to operate the semiconductor laser using a modulated feedback control signal. The wavelength control signal is adjusted based on the results of a comparison of a detected intensity signal with a feedback signal to align the lasing wavelength with the conversion efficiency peak of the wavelength conversion device. Laser controllers and projections systems operating according to the control concepts of the present invention are also provided. | 2008-11-13 |
20080279235 | Method and Apparatus For Driving Semiconductor Lasers, and Method and Apparatus For Deriving Drive Current Patterns For Semiconductor Lasers - Semiconductor lasers are driven such that high output laser beams are stably obtained without a long start up time. A method for driving semiconductor lasers by automatic current control or automatic power control with a constant current source involves the steps of: generating a pattern of drive current values for the semiconductor lasers, which is defined according to the amount of time which has elapsed since initiating driving thereof, that enables obtainment of substantially the same light output as a target light output by the automatic current control or the automatic power control; and varying the drive current of the semiconductor lasers in stepwise increments according to the pattern for a predetermined period of time from initiation of drive thereof A single pattern is used in common to drive the plurality of semiconductor lasers. | 2008-11-13 |
20080279236 | METHOD AND APPARATUS TO GENERATE AND MONITOR OPTICAL SIGNALS AND CONTROL POWER LEVELS THEREOF IN A PLANAR LIGHTWAVE CIRCUIT - Embodiments of an optical detection apparatus are disclosed which may include one or more of a waveguide, a trench formed in the waveguide, a reflective surface, and a photodetector. The waveguide may be formed in a semiconductor substrate to propagate an optical signal received at a first end of the waveguide. The trench may also be formed in the waveguide having a first sidewall and a second sidewall, the first and second sidewalls forming first and second angles with the waveguide's propagation direction. The second sidewall may include a reflective surface formed thereon. The photodetector may be configured to receive an optical signal propagated in the waveguide, through the first sidewall and reflected from the reflective surface on the second sidewall. | 2008-11-13 |
20080279237 | DYNAMIC THERMAL MANAGEMENT OF LASER DEVICES - The present invention generally relates to dynamic thermal management of a device. In one aspect, a method for thermally controlling a device is provided. The method includes setting a value of a set point in a thermoelectric cooler, wherein the set point corresponds to a first operating state. The method also includes monitoring a condition of the device to determine if the device is in the first operating state or a second operating state. Additionally, the method includes dynamically altering the value of the set point according to an algorithm upon determination that the device is in the second operating state. In another aspect, a method for dynamically controlling a device having a thermoelectric cooler is provided. In yet a further aspect, a system for dynamic thermal management of a device is provided. | 2008-11-13 |
20080279238 | ILLUMINATION APPARATUS, DISPLAY APPARATUS AND PROJECTION DISPLAY APPARATUS - An illumination apparatus includes: a solid-state light source; a Peltier element configured to cool the solid-state light source; a light amount sensor configured to detect an amount of a light emitted from the solid-state light source; a power consumption monitor configured to monitor power consumptions of the solid-state light source and the Peltier element; and a power controller configured to control powers supplied to the solid-state light source and the Peltier element. The power controller controls the powers supplied to the solid-state light source and the Peltier element, on the basis of the light amount detected by the light amount sensor and a sum of the power consumptions of the solid-state light source and the Peltier element. | 2008-11-13 |
20080279239 | Semiconductor Laser Device and Method of Manufacturing the Same - A semiconductor laser device | 2008-11-13 |
20080279240 | SEMICONDUCTOR LASER DRIVING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME - A semiconductor laser driving unit is disclosed that includes a first part generating a bias current; a second part generating a first current for causing the semiconductor laser to emit light, and outputting the first current to the semiconductor laser in accordance with an input control signal; a third part performing initialization to detect a light emission characteristic of the semiconductor laser, and causing the second part to generate a second current of a value obtained from the detected light emission characteristic; and a fourth part causing the second part to generate the first current in which a set offset current is added to the second current. The first part detects the amount of light emission of the semiconductor laser, and generates and outputs the bias current so that the amount of light emission produced by the sum of the bias current and the first current is a predetermined value. | 2008-11-13 |
20080279241 | Light-emitting element and method for manufacturing the same - A light-emitting element includes a mesa structure in which a first compound semiconductor layer of a first conductivity type, an active layer, and a second compound semiconductor layer of a second conductivity type are disposed in that order, wherein at least one of the first compound semiconductor layer and the second compound semiconductor layer has a current constriction region surrounded by an insulation region extending inward from a sidewall portion of the mesa structure; a wall structure disposed so as to surround the mesa structure; at least one bridge structure connecting the mesa structure and the wall structure, the wall structure and the bridge structure each having the same layer structure as the portion of the mesa structure in which the insulation region is provided; a first electrode; and a second electrode disposed on a top face of the wall structure. | 2008-11-13 |
20080279242 | PHOTONIC CRYSTAL STRUCTURES AND METHODS OF MAKING AND USING PHOTONIC CRYSTAL STRUCTURES - A light emitting device having a buried photonic bandgap (PBG) structure is created using a relatively simple fabrication method known as epitaxial layer overgrowth (ELOG). By burying the PBG structure, the difficulties and disadvantages associated with the known technique of etching holes into a LED emission surface to form the PBG structure are avoided. | 2008-11-13 |