Abstract: A method is disclosed for processing a mobile originating telephone call in a packet switched protocol based communication network comprising a packet switched protocol based cellular telephone network having a first layer for transferring signaling information assigned to the telephone call being processed by the communication network, a second layer for transferring payload information assigned to the telephone call, and an interface for coupling the cellular telephone network to a further network.

Abstract: A bit line selector switch is serially connected with a data sink for detecting high speed data transmissions, typically in the gigabit-per-second range, and a backplane having a plurality of data lines. The selector switch incorporates a selector circuit that operates in one of two modes, a first “selected”, or ON, mode and a second “not selected”, or OFF, mode. The selector circuit includes one, preferably differential, input. In one embodiment, a selector switch has a plurality of selector circuits thus allowing the switch to operate in both modes simultaneously. Data coupled to a differential input of the selector circuit will, when operating in the “selected” or ON mode, transmit the data to the data sink which be, for example, a memory device, processor, or the like. In the “not selected” or OFF mode, the selector circuit will pass any data received to a positive supply rail.

Abstract: A method and an apparatus for rate control in a high data rate (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which an access point (AP) may send data packets to an access terminal (AT). The data rate is selected to maintain targeted packet error rate (PER). The AT's open loop algorithm measures received signal to interference and noise ratio (SINR) at regular intervals, and uses the information to predict an average SINR over the next packet duration. The AT's closed loop algorithm measures a packet error rate (PER) of the received signal, and uses the PER to calculate a closed loop correction factor. The loop correction factor is added to the SINR value predicted by the open loop, resulting in an adjusted SINR. The AT maintains a look up table, which comprises a set of SINR thresholds that represent a minimum SINR necessary to successfully decode a packet at each data rate.

Abstract: A telecommunications system uses software applications called user agents, that are preferably Internet-based and that operate on behalf of users in a telecommunications hosting server to control call connections under control of a telecommunications network server that interfaces with the telecommunications hosting server as well as a connection-based public-telephone network. The telecommunications hosting server operates on a computer network on behalf of the user agents to provide call signaling in support of many advanced calling and telecommunications services. The functionality and, performance (e.g., execution) of the user agent(s) preferably takes place primarily within the telecommunications hosting server, though user client computers can provide some and possibly all of the user agent functionality, depending upon the particular implementation chosen.

Abstract: A transfer destination determining apparatus and method performing a load distribution in a network, where a plurality of transfer destination subjects are present as a transfer destination of a datagram, while the same collected flows are transferred to the same transfer destinations, the transfer destinations are allocated with respect to each of the collected flows. This apparatus has an extracting part extracting address and flow discrimination information, in the IP datagram; route solving part determining a transfer path based on the address information. When the determined path is a single path, the transfer destination is uniquely determined and the path is outputted to a post-staged apparatus, whereas when the path is a multi-path having a plurality of transfer destination subjects a multi-path number is outputted to a flow managing means which determines a transfer path corresponding, to a collected flow based on the received flow discrimination information and the multi-path number.

Abstract: A network switch having switch ports for communication of data packets with respective computer network nodes according to CSMA/CD protocol that resets a retry counter within any one of the respective switch ports if backpressure is asserted by that port. The resetting of the retry counter within a port after assertion of backpressure affords the port a greater probability of winning collision mediation under the CSMA/CD protocol, thus more quickly relieving congestion which may occur in the network switch.

Abstract: A loop carrier system includes a home local area network having plural telephone modules and a hub coupled to in-home telephone wiring. The telephone modules and the hub communicate voice signals over the in-home wiring in a dedicated frequency band above baseband POTS. The hub converts between voice signals and voice packets and is connected to a network access device for transferring the voice packets from the home local area network to a telecommunications network which routes the voice packets to a gateway. The gateway converts between the voice packets and a circuit format compatible with a local digital voice switch.

Abstract: Unavailable customer bandwidth in a connectionless IP network (100) is determined by first measuring network accessibility and network continuity (in Defects Per Million) via an accessibility measurement instrumentation device (202) and a continuity measurement instrumentation device (204). The accessibility and continuity measurements are combined via a mechanism (206) to yield a service unavailability measure that is then compared to a threshold value, representing the applicable customer unavailable bandwidth specified under an service level agreement specification (210). If the actual service unavailability exceeds the allowable unavailable customer bandwidth under the service level agreement, then an event correlation device (212) will correlate the service unavailability measure with network fault and performance alarm information from network alarms (216) to establish a root cause.

Abstract: Ethernet controller memory management systems and methods for memory management for an ethernet controller are provided which allocate blocks of memory based on the amount of data contained in the received ethernet frame. A linked list structure of frame descriptors is utilized for establishing the sequential blocks of allocated memory for data storage, however, the data pointers indicating the starting location of each sequential block of memory are dynamically updated through the use of a frame link detector circuit and methodology which establishes the correct pointer address in a next frame descriptor field based on adding a calculated length of the received data to an initial starting point memory address for the current frame descriptor memory block. Accordingly, the amount of memory allocated to reflect a respective frame descriptor for a particular received frame is limited to the necessary amount of memory to store the length of data received in the respective frame.

Abstract: A method and its apparatus for controlling multi-channel voice data in a gateway system between voice network such as a public switched telephone network (PSTN) and an internet network, in which a plurality of memory regions of channel buffer are statically allocated, to each of which an RTP header is allocated, and a voice packet received from the PSTN network and a voice packet received from an IP network are transferred, by which, a processing speed is remarkably reduced, and more channels can be accommodated.

Abstract: In a radio communication method and a apparatus in which a fixed-length data block is transferred between respective nodes by using a predetermined time slot of a plurality of time slots provided within each consecutive cycle, a transmission efficiency can be improved. The control node manages the transmission of isochronous communication data of each node at the unit of one cycle or a plurality of cycles. The unit information is transmitted to the control node by each node, and each node calculates a total data length of isochronous communication data transmitted within one cycle. A remainder is calculated by dividing this total data length with a data length of data block the unit information is obtained by using this remainder (S13 to S18), and this unit information is reported to the control node (S19).

Abstract: A network switch configured for switching data packets across multiple ports uses decision making device to generate frame forwarding information. The decision making device employs a modular architecture that enables data frames to be processed simultaneously and increase data throughput. The decision making device also includes a memory to store frame headers to minimize the signaling between the decision making device and the receive devices.

Abstract: The present invention aims at providing an ascending transmission speed controlling method and a communication system in an ATM-PON (asynchronous transfer mode-passive optical network), in which ascending transmission speeds on the PON are dynamically allocated corresponding to actual transmission states of communication channels of a best effort type, to thereby effectively utilize respective bands.

Abstract: A proxy MPOA client in a VLAN that is otherwise populated by legacy LECs such that the MPOA services for these LECs are provided centrally by the proxy MPC. A standard MPC enabled edge device is adapted to provide MPC services to legacy LECs that are not MPOA aware. Such an edge device provides MPOA services to legacy LECs located in other edge devices connected to the ATM cloud. The proxy MPC is configured to have at least two LECs: one residing on a legacy ELAN and another residing on an MPOA ELAN. Traffic from the legacy LEC arriving from the legacy ELAN is forwarded to an Ethernet port that is looped back to a second Ethernet port on the proxy MPC edge device. Upon ingress at the second Ethernet port, the traffic is treated as if it arrived from a regular port and provided with MPC services. The loopback may be implemented either internally or externally via one or more cables.

Abstract: An apparatus for testing the installation of Asymmetric Digital Subscriber Lines (ADSLs) that includes an ADSL Transceiver Unit - Central Office (ATU-C), an ADSL Transceiver Unit - Remote (ATU-R) and a load coil detector. The apparatus can test the operation of the Central Office ATU, the quality of the POTS cable pair connecting the end-user to the Central Office and the operation of the end-user's equipment. The tests can be carried out by using a standard main distribution frame test cord to connect the test apparatus to the existing test jacks and test shoes at the main distribution frame.

Abstract: The present invention relates to a head-mounted display comprising at least one image display panel and an optical system for projecting an image in a left and right exit pupil of the head-mounted display. The optical system comprises a beam splitter, a hollow mirror and a first and a second light channel each comprising a folding mirror and magnifying optics. The magnifying optics comprise a lens element. An additional lens, one surface of which is provided with a diffractive structure, is arranged between the image display panel and the hollow mirror.

Abstract: A waterproof lens barrel which includes at least one water-tight movable barrel which is movable along an optical axis, the water-tight movable barrel includes: an outer barrel that is in sliding contact with an annular sealing member; an inner barrel that is positioned inside said outer barrel; at least one through-hole formed on the outer barrel; and at least one stopper pin that is supported by the inner barrel, the stopper pin being snugly fitted in the through-hole so that no force in the radial direction is inflicted on the outer barrel by the stopper pin, and the relative movement of the inner and outer barrels in the direction of the optical axis is determined by the stopper pin and the through-hole.

Abstract: A lens barrel has a plurality of moving frames that move along the optical axis of lenses. The lens barrel comprises a first moving frame, a second moving frame, and an interlocking unit. The first moving frame moves along the optical axis. The second moving frame moves along the optical axis within a range smaller than the movable range of the first moving frame. The interlocking unit formed on the first moving frame interlocks the second moving frame with the first moving frame and moves the second moving frame responsively to the movement along the optical axis made by the first moving frame. The movable range of the first moving frame falls into a range of interlocking within which the second moving frame is moved interlocked with the first moving frame, and a range of non-interlocking within which the second moving frame is not interlocked with the first moving frame. Consequently, a moving mechanism for moving the plurality of lens frames can be simplified.

Abstract: A planar microlens array 1 includes an array of microlenses 3 made of a synthetic resin having a high refractive index and formed on a surface of one of a base glass plate 2 and a cover glass plate 4, and an adhesive layer 5 made of a synthetic resin having a low refractive index standing between the array of microlenses 3 and the other of the base glass plate 2 and the cover glass plate 4, wherein the equations (Eqs. 1-5) are satisfied, where, n.sub.1 represents the refractive index of the synthetic resin having a high refractive index, n.sub.2 represents the refractive index of the synthetic resin having a low refractive index, t.sub.1 represents the thickness of the thickest portion of the sphere portion of the microlenses, t.sub.2 represents said thickness of the rest portion of the microlenses and t.sub.3 represents the thickness of the thinnest portion of the adhesive layer.1.59.ltoreq.n.sub.1 .ltoreq.1.68 (Eq. 1)1.38.ltoreq.n.sub.2 .ltoreq.1.42 (Eq. 2)5.ltoreq.t.sub.1 .ltoreq.30 (.mu.m) (Eq. 3)t.sub.

Abstract: The first, movable encloses the front, middle and rear lens groups. The front and rear lens groups are supported by a front and a rear lens cell, respectively. At least one of the front and rear lens cells is an integral part of the front lens barrel. The front and rear lens cells are located at a fixed distance with respect to one another. The middle lens group is supported by a mid-lens cell. The mid-lens cell is slidably movable within the first, movable barrel and has at least three external cam followers. The second, movable barrel engages and at least partially encloses the first barrel and includes three cam grooves engaging the cam followers. The motor is operatively connected to the second, movable barrel. The motor rotates the second, movable, so that the second, movable barrel moves along the optical axis with respect to the first, movable barrel.