Abstract: A method and apparatus for providing improved security and improved roaming transition times in wireless networks. The same pairwise master key (PMK) from an authentication server can be used across multiple access points and a new pairwise transition key (PTK) is derived for each association of a station to any of the access points. A plurality of access points are organized in functional hierarchical levels and are operable to advertise an indicator of the PMK cache depth supported by a group of access points (N) and an ordered list of the identifiers for the derivation path. Access points in each level in the cache hierarchy compute the derived pairwise master keys (DPMKs) for devices in the next lower level in the hierarchy and then deliver the DPMKs to those devices. An access point calculates the PTK as part of the security exchange process when the station wishes to associate to the access point. The station also computes the PTK as part of the security exchange process.

Abstract: Methods and systems are provided that use smartcards, such as subscriber identity module (SIM) cards to provide secure functions for a mobile client. One embodiment of the invention provides a mobile communication network system that includes a mobile network, a mobile terminal, a server coupled to the mobile terminal via the mobile network, and a subscriber identity module (SIM) card coupled to the mobile terminal. The SIM card includes a first key and a second key. The first key is used to authenticate an intended user of the mobile terminal to the mobile network. Upon successful authentication of the intended user to the mobile network, the mobile terminal downloads a function offered from the server through the mobile network. The second key is then used by the mobile terminal to authenticate the intended user to the downloaded function so that the intended user can utilize the function.

Abstract: A method and system for channel quantization for multiuser diversity are provided. A quantizer may utilize quantization levels determined based on an objective function J that corresponds to a performance metric for a finite-rate feedback multiuser downlink communication system. The quantization levels may be obtained based on the results of maximizing the objective function J by means of an optimization algorithm. The optimization algorithm may be a multivariate optimization algorithm that may be implemented utilizing an iterative approach. The quantizer may utilize the quantization levels to quantize channel state information (CSI) to achieve multiuser diversity in the finite-rate feedback multiuser system. The performance metric may be based on signal-to-noise ratio (SNR), bit error rate (BER), and/or system capacity. The quantization levels may be utilized in a multiuser system where distributed quantization is needed for optimal selection.

Abstract: Certain aspects for the start-up procedure of transceivers supporting higher data rates over twisted-pair copper cabling are provided for 10 Gbit/sec Ethernet links (10GBASE-T). During a PMA (physical medium attachment) training period of the start-up procedure, long PMA training frames are exchanged periodically between link partners. A significant portion of each PMA training frame consists of known pseudo random sequences simultaneously transmitted over four wire pairs. PMA training frames include an InfoField for exchanging parameters and control information between link partners. For example, the InfoField's payload comprises fields for indicating current transmit power backoff (PBO), next PBO, requested PBO, transition count, control information, and for communicating precoder coefficients. Information in InfoFields is repeated and is not necessary that a link partner decodes every InfoField.

Abstract: A method and apparatus for providing a digital automatic gain control (AGC) for a radio-frequency (RF) receiver. The receiver comprises a logarithmic analog-to-digital converter for sampling the analog RF signals, a FIR filter for filtering the digitized signals, a resampler for resampling the digitized signals, and an automatic gain control circuit. The AGC circuit controls the resampling process to provide automatic gain control function in the digital domain. The resampler circuit has as its input a digital signal having a first plurality of bits. The output signal from the resampler has a second plurality of bits, where the second plurality of bits are less than the first plurality of bits. The automatic gain control circuit controls the resampling of the first plurality of bits to form the second plurality of bits in accordance with an automatic gain control signal.

Abstract: A three-dimensional antenna structure includes first and second antenna components and a via. The first antenna component is on a first layer of a substrate and the second antenna component is on a second layer of a substrate. The via couples the first antenna component to the second antenna component, wherein the first antenna overlaps, from a radial perspective, the second antenna component by an angle of overlap.

Abstract: In a RF communications system, aspects for single weight antenna system for HSDPA may comprise receiving HSDPA signals via a plurality of receive antennas and individually adjusting a phase of a portion of the received HSDPA signals via a single weight. The phase adjusted portion of the received HSDPA signals may be combined with at least one of the received HSDPA signals to generate combined HSDPA signals. At least one control signal may control the adjusting of the phase of the received HSDPA signals. Discrete phases may be communicated to adjust the phase of the portion of the received HSDPA signals, where the plurality of the discrete phases may range from zero radians to substantially 2? radians. Phase shift channel estimates may be generated during the identified time to determine the discrete phase. A desired phase may be generated from the phase shift channel estimates, and the single weight may be generated from the desired phase.

Abstract: A receiver operatively coupled to an antenna structure capable of receiving a first plurality of RF signals is disclosed herein. The receiver includes an RF processing network operative to perform weighting and combining operations within the RF domain using the first plurality of RF signals so as to produce a second plurality of RF signals. Also provided is a downconverter configured to downconvert the second plurality of RF signals into a second plurality of down-converted signals. In alternate implementations certain of the weighting and combining operations are performed at baseband and the remainder effected within the RF domain. A transmitter of corresponding architecture is also disclosed.

Abstract: Various example embodiments are disclosed. According to an example embodiment, an apparatus may comprise a first circuit, a second circuit, a transmission line coupled between the first circuit and the second circuit, and a Q-enhancement cell coupled to the transmission line.

Abstract: Systems and methods are described that automatically adjust a value of a parameter relating to the delivery of media content, such as audio content or image content, based on both environmental conditions and on automatically-learned user preference data. For example, a first embodiment adjusts a volume setting used to control the delivery of an audio signal based both on environmental noise conditions and upon automatically-learned user preference information, wherein the user preference information is derived by monitoring user-implemented adjustments to the volume setting after application of an automatic adjustment thereto.

Abstract: A wireless device comprising a single communication stack accessing a corresponding radio interface accessed via a corresponding physical layer, may utilize a plurality of communication sessions to perform a plurality of applications simultaneously. The corresponding radio interface may be utilized to perform initial connectivity and/or control functionality associate with each of the communication sessions; whereas data communication during the communication sessions may be performed utilizing one or more other radio interfaces supporting high speed data standards, which may also be accessed by the single communication stack, using corresponding other PHY and/or MAC layers. The connectivity and/or control functionality may comprise discovery, pairing, and/or initial connection. The plurality of high speed data standard may comprise WLAN, ultra-wideband (UWB), and/or 60 GHz PHY and/or PHY/MAC layers.

Abstract: A transceiver is provided for wireless communication. The transceiver can include a bias source, a transformer including a primary side and a secondary side, and a switching device. During a receive mode, the primary side of the transformer is configured to receive a first signal from a first port. During a transmission mode, the primary side is configured to transmit a second signal from a second port. The switching device is configured to couple the first port to the bias source during transmission of the second signal and to couple the second port to the bias source during receipt of the first signal. The bias source can be, for example, ground.

Abstract: An interface which effects communication between first and second systems and includes a first arrangement for communicating with the first system using a first protocol and a second arrangement for communicating with the second system using a second protocol. At least one of the arrangements includes a mechanism for effecting wireless communication. In accordance with the invention, a third arrangement is included for translating data received from the first system in accordance with the first protocol into data adapted for the second system in accordance with the second protocol. In the illustrative embodiment, the inventive interface further includes an arrangement for translating data received from the second system in accordance with the second protocol into data adapted for the first system in accordance with the first protocol.

Abstract: Systems, methods and apparatuses are described herein for distributing user attribute information about users of a communications system to communication terminals, which use the user attribute information to configure a speech codec to operate in a speaker-dependent manner during a communication session, thereby improving speech coding efficiency. In a network-assisted model, the user attribute information is stored on the communications network and selectively transmitted to the communication terminals while in a peer-assisted model, the user attribute information is derived by and transferred between communication terminals.

Abstract: Techniques are described herein that provide multi-channel noise suppression based on a Teager energy ratio. A Teager energy ratio is a ratio of an average Teager energy operator (TEO) energy of a first signal to an average TEO energy of a second signal. The average TEO energy of a signal is defined by the equation: E _ signal = 1 N ? ? i = 1 N ? [ x 2 ? ( n ) - x ? ( n + 1 ) ? x ? ( n - 1 ) ] . In this equation, ?signal represents the average TEO energy of the signal; N represents the number of frames in the signal; x(n) represents a magnitude of the signal with respect to an nth frame; x(n+1) represents a magnitude of the signal with respect to an (n+1)th frame; and x(n?1) represents a magnitude of the signal with respect to an (n?1)th frame.

Abstract: Systems, methods and apparatuses are described for deriving and updating user attribute information about users of a communications system. A communications network is then used to transfer the user attribute information to communication terminals, which use the user attribute information to configure a speech codec to operate in a speaker-dependent manner during a communication session, thereby improving speech coding efficiency. In a network-assisted model, the user attribute information is stored on the communications network and selectively transmitted to the communication terminals while in a peer-assisted model, the user attribute information is derived by and transferred between communication terminals.

Abstract: A communications network is used to transfer user attribute information about participants in a communication session to their respective communication terminals for storage and use thereon to configure a speech codec to operate in a speaker-dependent manner, thereby improving speech coding efficiency. In a network-assisted model, the user attribute information is stored on the communications network and selectively transmitted to the communication terminals while in a peer-assisted model, the user attribute information is derived by and transferred between communication terminals.

Abstract: Methods and apparatus for communicating data are disclosed. The example method includes allocating tokens to a first token bucket of a first two-rate, three-color meter (trTCM) at a first rate and allocating tokens to a second token bucket of the first trTCM at a second rate. The example method further includes allocating tokens to a first token bucket of a second trTCM at a third rate and allocating tokens to a second token bucket of the second trTCM at a fourth rate. The example method also includes reallocating tokens allocated to the first token bucket of the first trTCM to the first token bucket of the second trTCM when a token count of the first token bucket of the first trTCM exceeds a first capacity and reallocating tokens allocated to the second token bucket of the first trTCM to the second token bucket of the second trTCM when a token count of the second token bucket of the first trTCM exceeds a second capacity.

Abstract: Systems and methods are described for performing packet loss concealment (PLC) to mitigate the effect of one or more lost frames within a series of frames that represent a speech signal. In accordance with the exemplary systems and methods, PLC is performed by searching a codebook of speech-related parameter profiles to identify content that is being spoken and by selecting a profile associated with the identified content for use in predicting or estimating speech-related parameter information associated with one or more lost frames of a speech signal. The predicted/estimated speech-related parameter information is then used to synthesize one or more frames to replace the lost frame(s) of the speech signal.

Abstract: Techniques are described herein that provide multi-channel noise suppression based on a Teager energy ratio. A Teager energy ratio is a ratio of an average Teager energy operator (TEO) energy of a first signal to an average TEO energy of a second signal. The average TEO energy of a signal is defined by the equation: E _ signal = 1 N ? ? i = 1 N ? ? [ x 2 ? ( n ) - x ? ( n + 1 ) ? x ? ( n - 1 ) ] . In this equation, ?signal represents the average TEO energy of the signal; N represents the number of frames in the signal; x(n) represents a magnitude of the signal with respect to an nth frame; x(n+1) represents a magnitude of the signal with respect to an (n+1)th frame; and x(n?1) represents a magnitude of the signal with respect to an (n?1)th frame.