Abstract: A telecommunications system can include a network device with a layered protocol architecture for allowing transfer of upper layer Protocol Data Units using a shared medium. A data block includes a plurality of Protocol Data Units and a data block header, which includes a delimiter as a length indicator (LI). Any last protocol data unit of the data block has no delimiter. When a Protocol Data Unit fills the balance of the data block, the length indicator is zero having no data for a first link indicator in any next in sequence data block.

Abstract: Techniques for controlling handoffs in a wireless communication system include receiving a location vector from a mobile unit, and determining whether to perform a handoff of the mobile unit based on the received vector. The vector may also include time information related to the time at which the vector was transmitted. The vector may be obtained from a GPS satellite signal or one or more terrestrial stations.

Abstract: A method for access control in a wireless network having a base station and a plurality of remote hosts includes the optional abilities of making dynamic adjustments of the uplink/downlink transmission ratio, making dynamic adjustments of the total number of reservation minislots, and assigning access priorities by message content type within a single user message stream. The method of the invention further provides for remote wireless host paging and for delayed release of active channels by certain high priority users in order to provide low latency of real-time packets by avoiding the need for repeated channel setup signaling messages. In the preferred embodiment, there are N minislots available for contention in the next uplink frame organized into a plurality of access priority classes. The base station allows m access priority classes.

Abstract: Battery operated user equipment is disclosed for use in a radio telecommunications network, including means for monitoring the state of charge of the battery and means for communicating state of charge data to a base station during call set up. The battery data can be used to inform a caller that, for example, a called user's apparatus has reduced or limited battery capacity and thus that the expected duration of a call is limited.

Abstract: A method is provided of transmitting signals from two or more antennas in a wireless telecommunications network, in which at least one data sequence is space-time block encoded. Before transmitting the data sequence, a linear transformation is applied to the data sequence, the linear transformation being adapted to use knowledge of correlation among the antennas to at least partially compensate the transmitted signals for said correlation. The linear transformation depends on the eigenvalues of an antenna correlation matrix. The linear transformation further depends on a ratio of symbol energy (Es) to noise variance (?2). The method includes transmitting the encoded and transformed data sequence.

Abstract: A network management system for a multi-layer network having multiple architectural or technological domains includes an inter-domain configuration manager arranged between a set of one or more network service management applications and a set of network element domain managers, each of the domain managers being associated with a particular domain of the multi-layer network. The configuration manager implements network service design and provisioning functions across the domains of the network in conjunction with stored connectivity information characterizing the multi-layer network. The network management system further includes an inter-domain fault manager and an inter-domain capacity manager, which provide respective fault management and transport capacity management functions across the domains of the multi-layer network.

Abstract: An input signal is modified to compensate for amplifier memory effects by combining at least two versions of the input signal, each version of the input signal being offset in time with respect to one another. More specifically, an RF input signal is split into at least two split signals, a different delay is applied to each split signal, and the delayed, split signals are combined to obtain a modified input signal.

Abstract: The present invention relates to a polymeric composition of matter. The composition includes at least one polymer matrix and plurality of quantum dots distributed therein. The polymer may be a perfluorocyclobutane polymer having high optical transmission at telecommunications wavelengths. The quantum dots may include cap compounds to increase the solubility of the quantum dots in the composition. Typical cap compounds include aromatic organic molecules. Optical devices including waveguides may be fabricated from the polymeric compositions of the invention.

Abstract: A method of symmetric key encryption involves using a composition of transformations leading to an enhanced homophonic substitution, wherein the mapping of characters varies depending on the sequence of characters in the message text. In carrying out the method, encryption keys are first generated. Then, a polyalphabetic substitution is performed, which involves XOR'ing (e.g., a Boolean logical exclusive OR operation/calculation) the plaintext data elements with the generated keys. Next, the storage format is changed, from big-endian to little-endian or vice versa, and the data is stored in one or more square matrices. Finally, enhanced homophonic substitution is performed, meaning that for each element, the subset to which the element can be mapped to in the co-domain is the entire co-domain itself, thus providing the largest possible subset for the given co-domain. In other words, any given element in the domain can be mapped to any of the elements of the co-domain.

Abstract: Channels are allocated to one or more cells within a wireless LAN (WLAN) without causing unacceptable interference. The allocation involves dividing an allocation time period into frames, each frame having a substantially short duration, and then allocating one or more channels to one or more WLAN cells during each such frame according to an allocation vector. The vector assures that each cell allocated a channel is sufficiently distant from every other cell allocated the same channel to minimize cross interference. Only those cells allocated a channel are allowed to transmit during a given frame. The allocation vectors are determined in such a way that the performance of a WLAN is optimized.

Abstract: A method for detecting packet data transmission following an inactive period of a transmitter. The method includes using a dynamic acquisition search window which grows from an initial width (determined by the size of the corresponding standard search window prior to entering the inactive period) up to a maximum width (for example, the width of a full cell) in correspondence with the length of time that the transmitter is in the inactive state. The method is particularly directed to a mobile transmitter having active and inactive periods. The method according to the present invention is also useful relative to streaming data, such as voice, including a plurality of multipath components.

Abstract: Rounded solutions of a linear program are used to partition or group cells, such as cells in a wireless network, in order to provide efficient approximations of network updating and paging costs.

Abstract: The present invention provides a wide-sense, non-blocking WDM cross-connect that utilizes a relatively small number of wavelength interchangers. The cross-connect of the present invention comprises first, second and third fabrics and one or more wavelength interchangers that interconnect the first and second fabrics. Demands that require a change in wavelength are routed through the first fabric, through one or more of the wavelength interchangers, and through the second fabric. Demands that do not require a change in wavelength are only routed through the third fabric. A routing algorithm is utilized to ensure that any sequence of connection requests and withdrawals can be routed without disturbing any currently routed requests.

Abstract: In the method, spatial steering of parallel symbol streams and a transmit power of each symbol stream is determined based on a statistical distribution of a channel. The determined spatial steering and transmit powers may then be applied by a transmitter to optimize the transmit signal.

Abstract: A cell phone system that controls the functionality of cell phones based upon their geographical locations. Functionality information stored in data bases located at and unique to each location. A local or low power transmitter at each location transmits functionality information from the data bases to cell phones currently at the locations. Alternatively, a single data base common to the entire network is used to store functionality information for a plurality of locations. The geographical location of active cell phones is monitored and when a cell phone enters a restricted location, cell phone location information is transmitted to the network data base to read it out and transmit the applicable functionality information to cell phones. The functionality information may represent voluntary restrictions displayed on the cell phones or they may be mandatory restrictions that inhibit cell phone functions defined by the restrictions.

Abstract: A MEMS device fabricated from a single multi-layered wafer, which alleviates the alignment problem associated with a two-piece prior-art design. In one embodiment, the MEMS device has a stationary part and a movable part rotatably coupled to the stationary part. The stationary part has an electrode and a first conducting structure electrically isolated from the electrode. The movable part has a rotatable plate and a second conducting structure located on the plate and electrically connected to the plate. The mass and location of the second conducting structure are selected such as to compensate for the plate's imbalance with respect to the rotation axis. In addition, at the rest position, the first and second conducting structures form, around the electrode, a substantially continuous barrier adapted to provide electrical shielding for the electrode.

Abstract: A predistortion system uses spectral regrowth filtering in a feedback path thereof to reduce out-of-band error. An illustrative embodiment of the system includes a predistortion circuit which generates a predistorted signal, one or more signal processing elements configured to process the predistorted signal, and a feedback processing circuit coupled between an output of the one or more signal processing elements and a control input of the predistortion circuit. Associated with the feedback processing circuit is at least one spectral regrowth filter. The spectral regrowth filter is configured to pass an out-of-band portion of a feedback signal while attenuating an in-band portion of the feedback signal, and operates in conjunction with the feedback processing circuit to control one or more characteristics of the predistortion circuit.

Abstract: In the method of processing soft handoff information at a base station, soft handoff information of a mobile station is received at the base station. The soft handoff information indicates at least a number of base stations in an active list of the mobile station. The active list is a list of base stations involved in a call of the mobile station. The base station applies a rules set to the soft handoff information to determine changes in the active list. The rules set requires more stringent conditions be met to add a base station to the active list when the active list includes a first number of base stations as compared to when the active list includes a second number of base stations; wherein the first number is greater than the second number. The determination results are then sent to the mobile station.

Abstract: An apparatus comprising a plurality of closed-cells on a substrate surface. Each of the closed-cells comprise one or more internal walls that divide an interior of each of the closed-cells into a single first zone and a plurality of second zones. The first zone occupies a larger area of the closed-cell than any one of said second zones and the first and second zones are interconnected to form a common volume.

Abstract: A device comprising a substrate having a base layer, the base layer being connectable to a source of current. The device also includes fluid-support-structures located on the base layer. Each of the fluid-support-structures has at least one dimension of about 1 millimeter or less. The base layer is configured to impart heat to a fluid locatable over the base layer and convert at least a portion of the fluid to a vapor when a current is applied to the base layer.