Abstract: The invention pertains to a method off controlling radiation power of a radiation source (25) comprising the steps of a) measuring a radiated power of the radiation source (25), b) calculating an error value (e) which is indicative of a difference between the 5 radiated power and a setpoint value (SP), c) integrating the error value (e) to obtain an integrated error value by feeding the error value to an integrator (21), d) multiplying the error value (e) with a factor p to obtain a proportional error value, driving the radiation source (25) with a current which is derived from the error value (e) by adding the integrated error value and the proportional error value, f) providing a step signal (St) which indicates that the setpoint value (SP) is changed stepwise, and g) temporarily stopping the integration of the error value (e) when the step signal (St) indicates a stepwise change in the setpoint value (SP). By temporarily stopping the integrator (21) from integrating the integrator (21) does not wind up.

Abstract: The invention relates to a system for reading data stored on an information carrier (201), said system comprising: an optical element (202) for generating an array of light spots (203) from an input light beam (204), said array of light spots (203) being intended to scan said information carrier (201), a detector (205) for detecting said data from an array of output light beams generated by said information carrier (201) in response of said array of light spots (203).

Abstract: In a probe memory device, a technique of realizing consistency of high-density recording and high-speed reading/writing is provided. A recording medium is placed to a probe array chip on which a plurality of probes are arranged in such a way as to maintain a constant spacing thereto by adopting a high-stiffness elastic support structure. The recording medium is equipped with a stage scanner that is driven continuously while drawing a constant trajectory on an X-Y plane almost in parallel to a probe array chip plane. The probes are equipped with respective actuators each being driven in a Z direction almost perpendicular to the X-Y plane. Each of the probes is made to write or read by altering a distance between the probe and the recording medium in parallel processing. The X-Y actuator is controlled so that the probe may continue a predetermined cyclic movement.

Abstract: An electronic apparatus comprises a cylindrical storage device and a read/write component. The cylindrical storage device has a top surface, a bottom surface and a cylindrical surface. The cylindrical surface connects the top surface and the bottom surface opposite to the top surface. The read/write component is movably disposed near the cylindrical surface for data reading from or writing to the cylindrical surface.

Abstract: The invention pertains to a method for controlling radiation power of a radiation source (26), comprising the steps of a) driving the radiation source (26) in a first mode comprising the substeps of a1) determining a threshold current (Ithr) at which the radiation source (26) begins to radiate, a2) measuring the radiation power emitted by the radiation source (26), a3) driving the radiation source (26) with the threshold current (Ithr) increased with the a delta current (Idelta) for obtaining a predetermined radiation power Pr1, wherein the delta current (Idelta) is calculated by subtracting the measured radiation power (Pm) from the predetermined radiation power Pr1, b) driving the radiation source (26) in a second mode comprising the substeps of b1) determining the threshold current (Ithr), and b2) driving the radiation source (26) with the threshold current (Ithr) increased with the delta current (Idelta) for obtaining the predetermined radiation power Prt, wherein the delta current (Idelta) is calculated

Abstract: The invention relates to a record carrier for the storage and retrieval of information, comprising: a substrate (1), an active layer (2) for retention of information, the active layer employing bit-position encoding for the storage and retrieval of information and an energy shielding layer for shielding the energy during writing of the information in the active layer. Preferably, the energy shielding layer comprises a patterned reflective mask layer (3) or a switchable mask layer. Preferably, the reflective mask layer comprises a material with a relatively high thermal conductivity. Preferably, the patterned reflective mask layer comprises a metal or a metal alloy, preferably comprising aluminum silver, gold or copper. Preferably, the switchable mask layer comprises a thermo-chromic layer and is substantially transparent during the retrieval of information from the active layer. According to the invention, the record carrier has a relatively high information density.

Abstract: An optical recording medium 10 according to the present invention includes a supporting substrate 11 on which a groove 11a is formed, a light transmitting layer 12, a noble metal oxide layer 23 provided between the supporting substrate 11 and the light transmitting layer 12, wherein a depth of the groove 11a is set in excess of ?/8 n but 60 nm or less, where n is a refractive index of the light transmitting layer 12 with respect to a light whose wavelength is ?. Thus, the good signal characteristics, especially a push-pull signal with an enough amplitude, can be obtained when the super-resolution recording and super-resolution reading are carried out by irradiating the laser beam onto the noble metal oxide layer 23. Also, since the depth of the groove is set to 60 nm or less, a grave difficulty never arises in producing a stamper used to manufacture the substrate.

Abstract: This invention relates to a method, a computer program, a computer program product, a transmitter and a receiver for a multicarrier modulation, wherein symbols are assigned to carriers of a set of N carriers, said method comprising assigning at least one of said symbols to a first carrier of said set of N carriers, and assigning an antipodal representative of said at least one of said symbols to a second carrier of said set of N carriers.

Abstract: A method of receiving an orthogonal frequency division multiplexing (OFDM) signal. The method includes receiving sample signals from the OFDM signal, providing reference sample signals, calculating a first value representing a first correlation between the sample signals and different sample signals, calculating a second value representing a second correlation between the reference sample signals and different reference sample signals, the reference sample signals and the different reference sample signals corresponding to the sample signals and the different sample signals, calculating a third value from the first value and the second value, and detecting the OFDM signal in response to the third value.

Abstract: A Doppler frequency calculating apparatus that calculates a Doppler frequency, which is the magnitude of a time-dependent fluctuation of a characteristic of the transmission path through which an orthogonal frequency-division multiplexing (OFDM) signal is transmitted, includes a received signal point memory operable to store a received signal point of a sub-carrier having a reference carrier signal of the OFDM signal, a modulated component eliminating section operable to eliminate a modulated component from the received signal point stored in the received signal point memory, and a Doppler frequency calculating section operable to calculate a Doppler frequency by performing frequency analysis on the received signal point of each sub-carrier from which the modulated component has been eliminated by the modulated component eliminating section.

Abstract: A communication method includes causing a transmitter to apply error correcting or detecting code systems to multiple frames or packets and to transmit the multiple frames or packets in succession, causing a receiver to receive the transmitted frames or packets and to decode each of the frames or packets received, and causing the receiver to send an acknowledgment signal to the transmitter on the basis of the results of decoding of the frames or packets. The transmitter applies two or more error correcting or detecting code systems to the frames or packets.

Abstract: An apparatus and method for a communications network including at least one interface circuit reads frame data received from the communications network and writes frame data to be transmitted over the communications network, the frame data including a plurality of transport overhead fields. The apparatus includes signature logic coupled to the interface circuit, the signature logic identifying signature data and writing the signature data into transport overhead fields in an outgoing frame. Reflector logic coupled to the interface circuit copies data from one of the received transport overhead fields, the copied data being placed into a transport overhead field in the outgoing frame, the copied data including the received signature data. The interface circuit compares the copied data to earlier received frame data from the communications network, the determination of a mismatch identifying a transition requiring an update of at least one routing table.

Abstract: A method of dynamically controlling rate connections to sample buffers in a multi-mode processing system. The method can include receiving an instruction for communication in a multi-mode wireless processing system, and determining a rate at which a plurality of buffers are serially connected to elements external to the multi-mode wireless processing system for receipt or transmission of data.

Abstract: A system and method for allowing non-real time communication protocol enabled devices to participate in real-time communication protocol scenarios, comprising: discovering at least one non-real time communication protocol enabled device; logging on to at least one real-time communication server; assigning a unique real-time communication protocol identity to the at least one non-real time communication protocol enabled device; assigning a service proxy for the at least one non-real time communication protocol enabled device; and adding the unique real-time communication protocol identity to the at least one real-time communication server.

Abstract: In one embodiment of the invention, a method for prioritizing network packets, includes: comparing a packet with at least one copy rule; and if the packet matches the copy rule, then buffering the packet in a queue. The method further includes: processing the packet after buffering the packet in the queue.

Abstract: Automatic load-balancing provides a decision-making process that includes intelligent automatic detection of when a given load-balancing activation currently would not be beneficial, thereby keeping the user's network from being unnecessarily disturbed when no real benefit would be gained; a process to undo a prior load-balancing that can be activated when users have accidentally selected a feature which could substantially change their network configurations; and an extensive intelligent distribution algorithm that improves the network load by moving the right nodes to new segments.

Abstract: A system and method is presented that uses hardware at a central node to determine if bandwidth being provided to a remote node in accordance with an unsolicited grant service (UGS) flow requires adjustment. In one embodiment, the hardware performs this function by comparing information in two consecutively-received UGS extended headers from the same remote device. If the information in the current and previous UGS extended headers differ, then an indication is provided to software of the central node that the bandwidth being provided to the remote node requires adjustment.

Abstract: A system and method is presented that uses hardware at a central node to determine if bandwidth being provided to a remote node in accordance with an unsolicited grant service (UGS) flow requires adjustment. In one embodiment, the hardware performs this function by comparing information in two consecutively-received UGS extended headers from the same remote device. If the information in the current and previous UGS extended headers differ, then an indication is provided to software of the central node that the bandwidth being provided to the remote node requires adjustment.

Abstract: A method and system for combining requests for data bandwidth by a data source for transmission of data over a wireless communication medium is provided. A central node receives one or more bandwidths requests from one or more data sources via wireless communication. A scheduler then combines one or more bandwidths requests from the same data source to create a single data burst bandwidth. The central node then grants the data burst bandwidth to the appropriate data source via wireless communication.

Abstract: A method and apparatus for redirecting at least one call to avoid at least one congested link of a switch in a packet network is described. In one embodiment, the at least one call setup message is intended to be routed via a first link to the switch in communication with a conferencing component. However, a call blocking condition at the first link is detected. In response, the at least one call setup message is redirected via a second link to said switch to participate in said conferencing component.

Abstract: There is provided a system and method for multiple access and backhaul of a base station. More specifically, there is provided a method comprising detecting a decrease in throughput over a current backhaul, determining whether there is an alternate backhaul available, and accessing the alternate backhaul. There is also provided a base station comprising a first transceiver configured to communicate with at least one mobile device using a first wireless communication protocol, and a second transceiver communicatively coupled to the first transceiver and configured to communicate with the at least one mobile device using a second wireless communication protocol, wherein the first wireless communication protocol and the second wireless communication protocol are not compatible or backwards-compatible with each other irrespective of frequency.

Abstract: The present invention relates to the monitoring of paths along which signals are carried in a telecommunications network, in particular to determine if a path has been altered. Each path has a transit time associated therewith for data transport along that path. The method comprises the steps of: monitoring the difference between the transit time of a first signal path and the transit time of a second signal path, such that a change in the difference between the transit times of the two paths can be detected; and, in dependence at least in part on any such detected change, generating an alarm signal. The alarm signal can be used to indicate to a customer that one of the paths has been re-routed.

Abstract: A mesh network routing protocol for optimizing network data transmission capacity using a cost analysis based upon a links proximity to the gateway or other bandwidth constrained node. Specifically, the protocol computes a plurality of routing costs associated with each data path, compares the routing costs, and then selects the data path associated with the lowest routing cost for the transmission of data. Each link in each of the paths is weighted in view of its proximity to an ingress/egress point to the mesh network or other bandwidth constrained node or link of the network.

Abstract: A protocol designer uses an integrated development environment that integrates the editing of protocols and stacks along with the ability to compile the edited protocols. A protocol stack window is opened on a display for creating a new protocol stack or for retrieving and modifying an existing protocol stack. A protocol may be selected from the protocol stack and protocol specific information is provided in a stack information window on the display. Also a selected protocol listing may be displayed in a protocol editor window on the display. The protocol listing may be edited and then compiled as the modified protocol. Any compilation errors are indicated in a compilation results window. Indicated compilation errors point to the line of the listing in the protocol editor window where the error exists, which line may be highlighted.

Abstract: A solution for monitoring one or more problem conditions in a communications protocol implementation is provided. The communications protocol implementation includes an internal monitor thread that monitors one or more resources for problem condition(s). The internal monitor thread sets a problem flag based on a problem condition being present. A control process in the communications protocol implementation that controls a resource includes a problem monitor that resets the problem flag when the problem condition is cleared. To this extent, the problem monitor provides a check against the internal monitor thread. In this manner, the internal monitor thread and the problem monitor provide the communications protocol implementation with the ability to perform self-health monitoring.

Abstract: A memory module and method thereof are provided. In the example method, a test signal may be applied to a plurality of memory chips included in the memory module. Output data from the plurality of memory chips may be received in response to the applied test signal. The received, output data may be divided into a plurality of groups. At least one of the plurality of groups may be selected in response to an output group selection signal. The at least one selected group may be output (e.g., to an external device). The example memory module may include a plurality of chips and a hub. The example memory module may be configured to perform the above-described example method.

Abstract: Measurement system and method for determining a quality indicator for end-to-end data transfer in a wireless data network (1). A data network analysis system (10) is connected to the wireless data network (1) for measuring at least one system performance indicator using a predefined data transfer specimen. The measurement system (10) is further equipped with processing means (2) which are arranged for deriving the quality indicator for at least one other data transfer type from the at least one performance indicator. The present system and method also allow to analyse the contributions to the quality indicator for determining underlying causes for bad performance.

Abstract: Wireless communication systems adapted for compressing data prior to certain communications. Data compression may be limited or skipped when it is determined that the data compression may cause an unacceptable amount of data to be lost. Abnormal situation detection as part of data compression is included. Methods associated with such systems are also encompassed.

Abstract: A method, system, computer program product and apparatus are presented to enable a L2 network device, such as a bridge or switch, to control the flow of a multicast data stream to a connected router in response to control messages received from the router by the L2 network device. By controlling the flow of multicast data streams in this manner, there will be a corresponding reduction in wasted bandwidth due to unnecessary transmission of these multicast data streams and a reduction in processing overhead by the router due to analysis and dropping of unnecessary multicast frames. In one aspect of the present invention, the router can generate the control messages in response to receiving a data frame in a multicast data stream from the L2 network device.

Abstract: A system (10), method (90) and apparatus (14) are provided for provisioning a multicast stream, such as an IP multicast stream, in a network. The system includes a first tier (12), such as a national backbone, with a first Multicast Address Discovery (MCAD) directory (34), and at least one second tier having a headend, such as a regional headend (14), with a second MCAD directory (36, 38). The system (10) includes a tiered MCAD directory network that allows the assignment of multicast addresses to multicast streams received from an upper tier MCAD directory. The tiered MCAD directory structure allows for requesting and storing stream descriptors and delivering stream descriptors on-demand to MCAD-enabled devices throughout the system. The system (10) also allows for stream provisioning maintenance and validation at lower tier headends via MCAD-enabled device queries or re-queries of upper tier MCAD directories.

Abstract: A method for controlling bandwidth allocation of first and second data packet types (e.g. TCP traffic, real time traffic, VOIP traffic) in a single rate network by determining, by a device, a throughput rate of the first data packet type (e.g. TCP traffic, non-real time traffic, . . . ) in the network and reducing, by the device, the throughput rate of the first data packet type when the throughput rate reaches a predetermined level is described.

Abstract: A method for power control in a wireless communication system. An initial transmission of a data frame in the reverse link is received, and a first energy level of the data frame is measured. An energy deficit in the first energy level is then measured if the first energy level is insufficient to correctly decode the data frame, so that when the data frame is retransmitted with a second energy level equal to a difference between the first energy level and the energy deficit, the data frame can be correctly decoded with combined energy of the first energy level and the second energy level.

Abstract: An object of the present invention is to provide a transmission parameter control apparatus that can improve transmission quality of real-time media in a transmission route that includes a wireless section in at least a part of the transmission route. According to the present invention, a transmission parameter control apparatus 200 that is connected to a terminal 104 via a network 102 and that is connected to a mobile terminal 108 via a wireless link, is provided. The apparatus includes: an obtaining part 210 for obtaining a quality parameter indicating transmission quality corresponding to the wireless link from signals of downlink and uplink transmission routes; and an adjustment part 220 for adjusting a value of a transmission parameter determining a transmission scheme in the wireless link according to the quality parameter.

Abstract: Mobile node registration with the home network of the mobile node is delayed when the mobile node moves to a foreign network. The mobile node has a home network in which the mobile node has a home address. In response to the mobile node moving to a foreign network (such as by being turned on in the foreign network), the mobile node receives a care-of address. Where the mobile node has no ongoing communication sessions, the mobile node waits to register its care-of address with its home agent in the home network until the mobile node initiates a communication session within the foreign network, which may not ever occur. The mobile node by registering the care-of address with the home agent informs the home agent where to forward data sent to the mobile node's home address.

Abstract: The present invention is to provide a wireless routing mechanism by applying a management frame defined in IEEE 802.11 standard to different access points (AP) in a wireless distribution system (WDS) and adding an information element (IE) to the management frame, enabling any AP to be capable of maintaining the integrity of IE based on its own setting and state, determining other APs' operations in WDS based on a received IE and determining whether a physical link (i.e., wireless link) between itself and any of other APs should be established to provide a channel for sending data frames therebetween and automatically establishing a stable, flexible and expansible wireless network topology in a wire network infrastructure based on information contained in a plurality of fields of the IE.

Abstract: In certain embodiments, a method for proximity determination includes receiving one or more network identifiers, each associated with a corresponding network, from a first mobile device. The method further includes receiving one or more network identifiers, each associated with a corresponding network, from a second mobile device. The method further includes processing the network identifiers received from the first and second mobile devices to determine whether the first mobile device and the second mobile device are in proximity to one another.

Abstract: Apparatus, and an associated method, for allocating data to communication channels of a multiple-input communication system and to select power levels at which the data is caused to be communicated upon the communication channels. Data allocation is made responsive to communication quality indications that identify communication conditions on the different ones of the channels. Data allocation and power level allocation is made to achieve best a selected performance parameter.

Abstract: A Multi-Interface Mobility Management (MIMM) client is provided on a mobile Multi-Interface Device (MID) to support seamless network connectivity and switching of the MID. The MIMM client communicates with a MIMM Server. The MIMM Server collects information from MIMM Clients and provides information to the MIMM Clients pertaining to the network(s) to which the mobile MID has access, such as information concerning the availability of a network, the quality of network connectivity, etc. The MIMM Client is responsible for determining whether and when a handoff or roaming operation should be initiated by the mobile MID, and which network interface the mobile MID should use after the handoff/roam operation has been completed. The MIMM Client also is responsible for performing mobility-related functions that are required prior and subsequent to the handoff/roam operation. The MIMM Client uses the information received from the MIMM Server in order to make these determinations.

Abstract: An iterative arrangement of channel estimator (12), a Kalman filter unit (14), and a soft demodulator (16) is provided for producing an estimate of complex gain of a CDMA communications channel carrying data and pilot channels, and demodulated data of the data channel. An initial channel estimate is produced by the estimator (12) using only the low-power pilot channel. This later is improved by the iterative process using the data channel. The complex gains is represented by a sum of sinusoidal signals with different frequencies and randomly variable amplitude and phase.

Abstract: The specification and drawings present a new method, system, apparatus and software product for coordinating gating of an uplink (UL) control channel, e.g., a dedicated physical control channel (DPCCH), with UL reporting in regard to a downlink channel using, e.g., high speed uplink packet access (HSDPA) channel quality indicator (CQI) reporting.

Abstract: The specification and drawings present a new method, system, apparatus and software product for defining a preamble length of a preamble (e.g., a power control preamble) for a discontinuous control channel transmission using, e.g., a dedicated physical control channel (DPCCH) for transmitting the preamble. The preamble length can be optimized using a predetermined criterion depending on a transmission gap length (which can be variable) in the discontinuous control signal (e.g., transmitted on the DPCCH) or in a discontinuous data signal, e.g., transmitted on an enhanced dedicated channel (E-DCH), and/or on a length of a transmission timing interval (TTI) of the discontinuous data. Furthermore, a power in the preamble can be changed in time using a further predetermined criterion.

Abstract: Disclosed are systems and methods that allow the a mobile communications device to perform inter-frequency and inter-RAT measurements while receiving MBMS data. As disclosed, control of measurement occasions are decided on by the UE using Discontinuous Reception during Forward Access Channel reception. Using aspects of the disclosed embodiments, each UE individually decides when to perform inter-frequency/RAT measurements (provided performance requirements on cell reselection are met). Outer coding procedures may then be performed to recover data lost during the measurements.

Abstract: An effective random access control can be performed with a high throughput. A base station (11) communicates with mobile stations (12) by use of slotted ALOHA system. An offset time of 1.5 frames is established between upstream and downstream communication frames. If any of the upstream communication frames is available, the base station (11) notifies a transmission permission signal (I) by use of the corresponding downstream frame. If having data to be transmitted, a mobile station (12) in a reception state receives the transmission permission signal (I), switches itself into a transmission state, and transmits one frame of leading data by use of the upstream frame. If permitting continuous transmission of data following the leading data, the base station (11) transmits a continuous transmission permission information (P) to that mobile station (12), and transmits a transmission inhibition signal (B) to the other mobile stations (12) during that continuous transmission.

Abstract: Methods and devices for operating a wireless network including redundant communication. Methods involving redundantly connected nodes are discussed including addressing methods and/or methods of creating groups for such redundant communication. The use of primary and secondary redundant connections is discussed. The inclusion of a redundant network in association with a non-redundant network such as a Zigbee® protocol network is discussed. Also, devices for implementing such methods are described.

Abstract: Methods and systems are disclosed for managing network content delivery using client application workload patterns. In addition to network link analysis done by prior systems, application level performance of the end user device is analyzed in order to adjust parameters of the delivered content data stream and to thereby improve the quality of service (QoS) for delivered content.

Abstract: A node may include a receiver configured to receive signals transmitted from a gateway and a logic device coupled to the receiver. The node may also include a memory configured to store label information identifying a data packet stored in the node. The logic device may be configured to receive a message from the gateway, where the message includes label information, and access the memory to identify a data packet based on the label information included in the message. The node may also include a transmitter configured to transmit the data packet to the gateway over a channel shared with a number of other nodes.

Abstract: A terminal apparatus which stores secret information includes: available area information storage means; current position information generating means for generating current position information which indicates a current position of the terminal apparatus when the terminal apparatus is activated; available area inside/outside determining means; available area outside power supply disconnecting means; authenticating means for determining whether or not authentication of an authorized person permitted to use the terminal apparatus is possible using the terminal apparatus user's authentication information when the terminal apparatus is restarted once power supply is disconnected by the available area outside power supply disconnecting means; and authentication impossible power supply disconnecting means for disconnecting the power supply of the terminal apparatus when the authenticating means determines that the authentication is impossible.

Abstract: A method is provided for transmitting a packet data unit (PDU) by a transmitter in a wireless mobile communication system. The method includes determining at least one desired transmission PDU, determining a modulation scheme corresponding to the number of PDUs, and transmitting a first indicator value indicating the number of PDUs and the modulation scheme, transmitting the PDUs, receiving a second indicator value indicating a reception state of the PDUs, from a receiver that receives the PDUs, determining a new PDU or a retransmission PDU according to the second indicator value, and determining a modulation scheme corresponding to the number of the determined PDUs, and transmitting a third indicator value indicating the number of PDUs and the modulation scheme, and the corresponding PDUs.

Abstract: A system and a method for multimedia multicast transmission in a mobile wireless network are proposed, which can be applied in a multiple-antenna system as well as a single antenna system. The basic message and additional message are transmitted at the same time. Receivers with different capability also with different complexities are used to demodulate different message. In order to design low-complexity receiver, the signal can be demodulated noncoherently for multimedia transmission.

Abstract: The specification and drawings present a new method, system, apparatus and software product for communications, e.g., wireless communications, for defining a power in a discontinuous control signal after a transmission gap for an uplink control channel, e.g., dedicated physical control channel (DPCCH), wherein the power in the discontinuous control signal after the transmission gap is determined, using a predetermined criterion, by control information (e.g., regarding an allowed power window) and by a length of a transmission gap for the uplink control channel or of a further transmission gap in an uplink discontinuous data signal.