Abstract: In a wireless multiple access communications system a channel resource is managed by utilizing traffic segments and acknowledgment segments to determine if data traffic needs to be retransmitted. traffic data and has a prescribed finite time interval and bandwidth. Each traffic segment in a downlink or an uplink is associated with an acknowledgment segment in the uplink or downlink, respectively, in a fixed one-to-one manner. A base station uses the acknowledgment segments in the downlink to acknowledge the associated traffic segments successfully received in the uplink. A wireless terminal that receives a downlink traffic segment uses the associated acknowledgment segment in the uplink to acknowledge the traffic segment. The base station monitors all the acknowledgment segments to determine whether any of the traffic segments needs to be retransmitted.

Abstract: Techniques and systems for assigning resource chains for transmission of a communication signal from an origination point via a node or a plurality of nodes to a termination point are described. Separate determinations of minimum costs of transmitting the communication signal from the origination point to the node and from the node to the termination point on each of a plurality of channels are made. Potential channels corresponding to such minimum costs are identified. The separate minimum costs are combined and a plurality of cumulative minimum costs of transmitting the communication signal from the origination point to the termination point are determined. A lowest cumulative minimum cost and corresponding selected channels and nodal actions from the origination point to the node and from the node to the termination point are identified. The costs of regeneration and wavelength conversion resources consistent with the channels may also be identified.

Abstract: A method and apparatus for characterizing an optical pulse using a reduced complexity chronocyclic tomography is described. In one example, an optical pulse train is modulated using quadratic temporal phase modulation. A first spectral intensity of the optical pulse train is measured after a quadratic temporal phase modulation having a first amplitude. A second spectral intensity of the train of optical pulses is then measured in response to the quadratic temporal phase modulation having a second amplitude. At least one of the group delay and the spectral intensity associated with the train of optical pulses is computed using the first spectral intensity and the second spectral intensity.

Abstract: A system, method and apparatus for monitoring impairment related parameters such as Q factor within an all-optical system by using forward error correction (FEC) to derive a bit error rate (BER), which BER is used to determine the impairment related parameters.

Abstract: Methods and apparatus for estimating mobile station location in a wireless communication system. At initiation of a call or a page response, a mobile station of the system sends an access request signal to a primary base station. The primary base station responds with an access acknowledgment which may be intentionally delayed such that the mobile station increases its transmit power level. The primary base station then transmits a channel assignment message to the mobile station. The mobile station responds by transmitting a location signal in the form of a known user-specific traffic preamble at the higher transmit power level. The primary base station intentionally delays sending an acknowledgment of the preamble, such that the mobile station transmits the preamble for a longer period of time than it would otherwise.

Abstract: A system for and method of multi-protocol label switching (MPLS) network tuning. In one embodiment, the system includes a hot zone clearing subsystem that recursively identifies label switched paths (LSPs) to be rerouted from a defined hot zone subject to edges to be avoided. In that embodiment, the system further includes an LSP ordering subsystem, which is coupled to the hot zone clearing subsystem, that orders the LSPs to be rerouted to yield a migration sequence. The migration sequence is employable to reduce a load of the hot zone.

Abstract: Methods and apparatus for wireless communication in systems such as omni-beam and narrow-beam fixed wireless loop (FWL) systems. In a first technique in accordance with the invention, referred to as code division duplex (CDD) time-slotted CDMA, uplink and downlink portions of the system are separated using code division duplexing, while the users within a given cell are also separated using codes, e.g., using time-slotted CDMA. In a second technique in accordance with the invention, referred to as time division duplex (TDD) time-slotted CDMA, uplink and downlink portions of the system are separated using time division duplexing, e.g., time slots, while the users in a given cell are separated using codes, e.g., time-slotted CDMA. Both the CDD and TDD techniques may make use of an electronically-steered beam which is designed to provide simultaneous coverage within a given cell for two or more users separated by codes.

Abstract: An imaging device having a configurable focus area comprising: (a) an imaging system for generating a video signal of an image within a field of view, wherein the imaging system is adapted to adjust the focal point of the image according to an adjustment signal; and (b) a focusing system comprising: (i) a configuration device for facilitating configuration of a focus area within the field of view; and (ii) autofocusing circuitry coupled to the imaging system and the configuration device, the autofocusing circuitry being configured for correlating a configured focus area to a portion of the video signal, analyzing the portion for resolution, and effecting an adjustment signal to the imaging system to adjust the focal point of the image to improve the resolution of the configured focus area.

Abstract: A monitoring and tracking system for monitoring and tracking an object may have a plurality of object area network elements. Each of the object area network elements may have a wireless communications unit and a GPS unit, wherein the GPS units are designed to facilitate the calculation of position data for each of the plurality of object area network elements. The wireless communications units may be designed to facilitate communications between the plurality of object area network elements and at least one base station. Each of the plurality of object area network elements may further have a sensor unit, the sensor units each having at least one temperature sensing unit for obtaining temperature data and at least one pressure sensing unit for obtaining pressure data. The object area network elements may be designed to communicate the temperature data, the pressure data, and the position data to the base station.

Abstract: The present invention provides a system and method for automatically compensating for transmission line losses at a wireless base station antenna site. Transmission line losses are measured and the result of the measurement is used to adjust a variable gain amplifier which receives reception signals from the transmission line.

Abstract: A method and system of processing a call from a calling party to a called party are provided to enable selective call waiting which involves determining whether the called party is busy on another call; receiving a password from the calling party; and providing a call waiting signal to the called party only if the password corresponds to at least one predefined password associated with the called party.

Abstract: A text to speech system modeling durational characteristics of a target speaker is addressed herein. A body of target speaker training text is selected having maximum possible information about speaker specific characteristics. The body of target speaker training text is read by a target speaker to produce a target speaker training corpus. A previously generated source model reflecting characteristics of a source model is retrieved and the target speaker training corpus is processed to produce modification parameters reflecting differences between durational characteristics of the target speaker and those predicted by the source model. The modification parameters are applied to the source model to produce a target model. Text inputs are processed using the target model to produce speech outputs reflecting durational characteristics of the target speaker.

Abstract: Audio tracks or other portions of a particular type of audio material to be encoded are analyzed to determine a value of at least one coding-related parameter suitable for providing optimal encoding of the particular type of audio material. When a given portion of the audio material is to be encoded for transmission in a perceptual audio coder of a communication system, the value of the coding-related parameter is identified and then utilized in conjunction with the encoding of the given portion. The determined value of the coding-related parameter may be at least a portion of a psychoacoustic model utilized in encoding the given portion of the particular type of audio material in the perceptual audio coder. As another example, the value of the coding-related parameter may be a setting of an audio processor utilized to process the given portion of the particular type of audio material prior to encoding the given portion in the perceptual audio coder.

Abstract: A time division multiplexed communications method and system in which time is divided into a number of frames and each frame is divided into N data bursts. The method and system further has a first multiplexer by which a half rate channel is formed as a series of bursts that occur periodically every N bursts once per frame, a second multiplexer in which a full rate channel is formed as two half rate channels on consecutive timeslots, and a transmitter transmitting the full rate channel from a first wireless station to a second wireless station. The full rate channel provided by two half rate channels on consecutive timeslots yields a significantly larger resource pool available for assignment of communication traffic. For full rate channels, the interleaving 0246/1357 method that is used by the system is just as good as the known 0123/4567 method when ideal frequency hopping is used, and the 0246/1357 method performs better when non-ideal frequency hopping or no frequency hopping is used.

Abstract: A method and apparatus for controlling administration of Automatic Call Distributor (ACD) queues of an ACD or network of ACDs by a caller, and of communicating data to an ACD Agent. The caller receives information concerning the status of queues in one or a plurality of ACDs. If the caller wishes to communicate with a particular Agent, wait time for that Agent is provided to the caller. The caller can select a particular Agent, and will be connected when that Agent becomes available subject to other restrictions of the ACD queue. The caller can prepare information for transmission to an answering Agent while the caller waits. Advantageously, the caller can control which Agent or which sub-group of Agents should respond to his/her call, taking into account the different waiting times associated with a particular Agent or the first available Agent when the caller reaches the top of the queue.

Abstract: A protocol for handling multiple access on broadband communication networks, e.g., fiber/coax networks and wireless networks, supports both continuous bit rate (CBR) and variable bit rate (VBR) traffic representing voice, video telephony, interactive television, and data. The invention is carried out both in customer premise equipment (CPE) at stations, and in a common controller with which all stations communicate. A medium access control (MAC) processor provided in each of the stations and in the common controller divides the time domain for a given RF channel into a series of successive frames, each having a plurality of time slots. Because of the architecture of the communication network, individual stations do not communicate directly with each other, but can receive broadcast messages indicating the status of each time slot, which messages are generated in the common controller and transmitted in a downstream channel.

Abstract: The extended messaging scheme adds additional packet formats to the prior art 6-byte Lucent Access Interface Unit (AIU) Message Format of Table 1. The extended messaging scheme supports multi-packet messaging over telecommunication system configurations not supported by the prior art AIU Message Format. In one implementation, the extended messaging scheme includes (1) a “first-of-many” packet format for the initial data packets of messages requiring more than one 6-byte data packet, (2) a “continuation” packet format for the one or more subsequent data packets corresponding to such multi-packet messages, and (3) a “first-and-only” packet format for messages requiring only a single data packet. The extended messaging scheme enables telecommunication systems to be configured with one or more (possibly non-co-located) client terminals in addition to a main remote terminal to provide telecommunication services to a large number of widely distributed customers.

Abstract: An echo canceler has its otherwise conventional tapped delay line basis functions augmented with at least one pair of basis functions realizing two quadrature responses of a complex pole. The frequency of this complex pole is selected as substantially equal to the frequency of the dominant pole of a highpass filter inserted into the echo path of the echo canceler, where the dominant pole is the pole closest to the unit circle. This echo canceler arrangement results in a substantial improvement in attainable echo-return-loss enhancement (ERLE).

Abstract: A highly efficient mix network for small numbers of inputs is provided. Four data messages would be a typical number of inputs. The structure of sorting/permutation networks is used to permute the input. This is done in a way that changes the position of pairs of items. A mix network is provided which is highly efficient on small input batches and is robust and private in the face of collusion by any minority set of mix servers. Additionally, the mix network method and apparatus has the feature of being publicly verifiable because the mixing method yields a transcript of results that can demonstrate to a third party that the mix proceeded correctly. An apparatus comprised of a plurality of mix servers is provided. Each mix server includes a randomizer network. Each randomizer network receives a plurality of input data messages and performs re-encryption and permutation operations on the plurality of input data messages to form a plurality of output data messages.

Abstract: Apparatus, method and system embodiments are illustrated which provide for detection and recovery of missing wireless devices in communication systems. The preferred system embodiment includes a mobile switching center, an adjunct network entity, a base station, and a mobile unit, such as a cellular telephone or a wireless personal digital assistant. The adjunct network entity, such as an intelligent network server, has a detection and recovery application for determining, when a mobile unit is missing, a recovery identification and a recovery channel for the missing mobile unit. The mobile switching center then transmits a recovery page to the mobile unit via the base station, in which the recovery page includes information specifying the recovery identification and the recovery channel. The mobile unit, upon reception of a recovery page, enters a recovery mode and transmits a recovery signal on the recovery channel, with the recovery signal including the recovery identification.