Abstract: An optical bus for distributing optical signals. In one form, the optical bus comprises an optical fiber comprising an integrated array of thermal switches at predetermined intervals. In another form, the optical bus comprises an optical fiber comprising an integrated array of optical beam splitters at predetermined intervals.

Abstract: A fiber-optic cable routing and bend limiting device having a base with a top surface that defines a plane. A bend limiter and a mounting plate extend generally perpendicular to and away from the plane at opposite ends of the base. A separation bar also extends generally perpendicular to and away from the plane and is positioned between the bend limiter and mounting plate. The bend limiter has a generally arcuately-shaped surface and a generally planar surface that enables adjacent placement of two fiber-optic cable routing and bend limiting devices constructed in accordance with an embodiment of the present invention. When two devices in accordance with the present invention are positioned adjacent each other with their respective planar surfaces confrontingly opposite each other, their respective arcuate surfaces define a generally continuous cable routing path between the two adjacently positioned devices.

Abstract: The specification describes a packaging arrangement for micro-electromechanical systems (MEMS). The MEMS devices are mounted on a ceramic platform and are then packaged in a hybrid package. The hybrid package may be hermetically sealed. The hybrid package uses a ceramic insert as the primary MEMS device enclosure. The ceramic insert is mounted on a polymer printed wiring board, which provides both support and electrical interconnection for the ceramic insert. Optical access to the MEMS device is through a transparent window that may be hermetically sealed to the ceramic insert. The use of a ceramic primary enclosure for the MEMS device array substantially eliminates thermomechanical instabilities and provides thermomechanical and hermetic performance for the elements that require it. The main interconnection and routing function, implemented using standard epoxy printed circuit technology, yields high interconnection versatility and performance at low cost.

Abstract: An apparatus, method and system are provided for a hand-off of a communication session in a wireless data network system, in which the communication session has been established previously with a mobile unit through a first base station, a first serving routing node and a gateway routing node utilizing a first addressing context. The preferred method embodiment includes, when a second base station has been selected for hand-off, first establishing a second addressing context, for the mobile unit, between the gateway routing node and a second serving routing node. The gateway routing node then concurrently routes incoming data packets for the mobile unit to the first serving routing node utilizing the first addressing context and to the second serving routing node utilizing the second addressing context.

Abstract: In accordance with the invention, an optical fiber Bragg grating comprises a length of gloss optical fiber having a core, a Bragg grating formed along the core, a glass cladding and a polymer coating on the cladding having an index of refraction matched to that the cladding. Such index matching can reduce the cladding mode loss by a factor of four over current levels. A preferred coating material comprises fluorinated urethane acrylate.

Abstract: An optical-to-optical wavelength converter for converting a plurality of optical bits from a first wavelength in a first wavelength band to a second wavelength in a second wavelength band. The optical-to-optical wavelength converter employs a directional coupler. The directional coupler includes at least one optical element having an index of refraction, which changes in response to optical power substantially in the first wavelength band.

Abstract: The system for broadband data payload conversion functions to efficiently convert broadband data between two sets of data formats. In particular, this software system converts between AUG/AU3/VC3 clear channel payloads and AU4/VC4/TU3/VC3 clear channel payloads in an efficient manner, which also complies with the industry standard data formatting requirements. The present system implements an efficient data format conversion process that uses existing circuitry and can effect the data format conversion with only a few bytes of delay instead of an entire frame of delay as is typically found in existing systems. This is accomplished by manipulating the format conversion to simplify the format conversion process.

Abstract: A high-capacity optical transmission arrangement utilizing a plurality of laser sources and a plurality of wide-band optical amplifiers permit the reliable transmission of 1 Tb/sec rates over significant distances of optical fiber.

Abstract: A base station of a code division, multiple access (CDMA) telecommunications system employs scheduling of data transmission signals to corresponding user transceivers in down-link channels of a data network. One or more user transceivers may be in communication with a base station within a cell, and each user may have a minimum data rate requirement. In accordance with the present invention, the scheduling of user data transmission follows the constraints that 1) each base station transmits to user transceivers one at a time, and 2) the base station uses full available power for the down-link channel when transmitting (for data networks only). Given a data network of users, the method of scheduling and data rates may be modeled in accordance with a linear programming problem optimized according to a predefined criterion. In addition, the present method may be employed in a hybrid CDMA/time-share system to reduce power of data channels in communication with user transceivers near the base station.

Abstract: A method and a receiver for reducing adjacent-channel interference to a digitally modulated receive signal evaluates error rates of the receive signal associated with different receive bandwidths of the receive signal. The receiver selects a preferential bandwidth among the different bandwidths based on a suitably low error rate associated with the preferential bandwidth. The selection of the different bandwidths is achieved by digital signal processing that weighs desired data bits representing a desired bandwidth differently than rejected data bits representing a rejected bandwidth.

Abstract: A remote loop-back device with elements outside a waveguide such that the elements do not interfere with propagation of waves traveling in the waveguide. The remote-loop-back device also uses lossless lines of defined length for transporting the microwave signals outside the waveguides.

Abstract: The invention provides a power control methodology that increases the performance and the throughput of wireless communication systems. In particular, the invention provides a reverse jamming prevention process that efficiently utilizes power resources in a communication system such as CDMA. The invention advantageously prevents reverse jamming due to link imbalance that results from differences in forward and reverse link coverage. According to the invention, an evaluation set (e-set), which is a super set of the active set of base transceiver stations serving specific users, is determined to prevent the negative effects of reverse jamming. Excessive interference problems in the reverse link, particularly in high-speed wireless systems, are thus avoided.

Abstract: In accordance with the invention, an N channel WDM system is provided with add/drop capability by distributing the N channels among M paths where N<M, filtering each of the M paths through P add/drop filters where M×P=N, and recombining the M filtered paths for transmission. This can be implemented with an M×1 demultiplexer, tunable Bragg grating filters and a 1×M multiplexer.

Abstract: The method for transferring data sends the data as part of first and second permanent identifiers during a communication procedure prior to establishing a traffic channel in the communication system. Besides the data, the first permanent identifier includes routing information to a home system forming part of the communication system. The second permanent identifier is an expanded permanent identifier with the data forming at least part of the expanded portion thereof. Based at least on recognizing a portion of the second permanent identifier, a home system sends the first and second permanent identifiers to a destination entity. The destination entity extracts the data from the first and second permanent identifiers. In this manner, a traffic channel does not need to be established to transmit the data.

Abstract: A design technique minimizes the loss and ripple in the spectral response of an optical filter formed using a pair of gratings connected by an array of optical elements. This filter can be, for example, two waveguide grating routers (WGRs) connected by an array of waveguides. Each WGR includes two star couplers connected by waveguide grating arms. The smoothest spectral response is achieved for a given set of connecting waveguides, by choosing the number of grating arms less than or equal to filling the star coupler central Brillouin zone made by the set of connecting waveguides resulting in the connecting waveguides neither substantially over- or under-sampling the optical spectrum from the waveguide gratings. Exactly filling the Brillouin zone with the grating arms minimizes the loss, and so is the preferred choice.

Abstract: A method and system to provide GSM subscribers roaming into CDMA or TDMA networks, and CDMA or TDMA subscribers roaming into GSM networks, with basic call delivery wireless services as long as the roamers can pay the bill with their valid credit card, and to do so independently of and as a bypass of GSM Memorandum of Understandings for cellular/PCS services. This is achieved by integrating the proper pieces of wireless and wireline networks and secure communications, using IP networks and protocols as an alternative to the existing telephony-based approach.

Abstract: In a data communications network, an edge router comprises a buffer for storing data packets, one or more line interface cards for routing data packets to and from the data communications network, and a processing engine for processing a limited portion of each packet that has been captured by an associated line interface card in a packet tag. The processing engine includes one or more pipeline processing modules (PPMs) which may be dynamically configured by a system controller to perform specific processing functions in a pipelined arrangement. In order to increase edge router throughput, each packet tag is processed by the processing engine essentially in parallel with storage of the associated data packet in the buffer by the associated line interface card.

Abstract: A web-based voice dialog interface for use in communicating dialog information between a user at a client machine and one or more servers coupled to the client machine via the Internet or other computer network. The interface in an illustrative embodiment includes a web page interpreter for receiving information relating to one or more web pages. The web page interpreter generates a rendering of at least a portion of the information for presentation to a user in an audibly-perceptible format. A grammar processing device utilizes interpreted web page information received from the web page interpreter to generate syntax information and semantic information.

Abstract: A high order SINC interpolator and as a high order SINC decimator. The high order SINC interpolator includes an interpolator input and a plurality of cascades of integrators. The inputs of each of the cascades are coupled to the interpolator input through a low frequency delay circuit. The outputs of each of the cascades of integrators are coupled through a plurality of adders to generate a single interpolator output. The high order SINC decimator includes a decimator input and a plurality of cascades of integrators. The decimator input is coupled to the input of each of the cascades of the integrators. At least one low frequency delay circuit is coupled to an output of the cascades of the integrators and the output of each low frequency delay circuit is coupled to the decimator output through an adder.

Abstract: A computer operating system in which transfer of control of executing threads between protection domains is implemented using specific portals dedicated to the particular transfer of control between two protection domains. The transfer of control may also include parameter manipulation. A server registers a portal specification with a portal manager, the portal specification defining the behavior of portals which transfer control to the server. Thereafter, when a client application desires service from the server, the client application requests instantiation of a portal which will transfer control of an execution thread from the client application protection domain to the server protection domain. Upon receipt of the request, the portal manager dynamically generates portal code and updates a portal table associated with the client application, thus instantiating the portal.