Abstract: A packet-based, hierarchical communication system, arranged in a spanning tree configuration, is described in which wired and wireless communication networks exhibiting substantially different characteristics are employed in an overall scheme to link portable or mobile computing devices. The network accommodates real time voice transmission both through dedicated, scheduled bandwidth and through a packet-based routing within the confines and constraints of a data network. Conversion and call processing circuitry is also disclosed which enables access devices and personal computers to adapt voice information between analog voice stream and digital voice packet formats as proves necessary. Routing pathways include wireless spanning tree networks, wide area networks, telephone switching networks, internet, etc., in a manner virtually transparent to the user.

Abstract: A system for transmitting data directly between a plurality of client network devices in a network having an Access Point (“AP”) device separate from the plurality of client network devices is disclosed. The system may include a first client network device having a first client (“STA”) module and a second client network device of the plurality of client network devices.

Abstract: Disclosed is an amplifier circuit configured to amplify a pulse stream. The amplifier circuit comprises a switching block including a first switch operable to couple an output node of the switching block to a positive reference voltage, a second switch operable to couple the output node to a ground reference voltage and a third switch operable to couple the output node to a negative reference voltage. The amplifier circuit is configured to amplify the pulse stream into an amplified signal detectable at the output node such that the amplified signal has a common-mode voltage level substantially equal to zero volts. In one embodiment, the amplifier circuit is configured to amplify the pulse stream in accordance with a Class-D amplification scheme. In one embodiment, the output node can be directly connected to a load device without a DC blocking capacitor being interposed between the output node and the load device.

Abstract: A power management scheme for a wireless communications device processor substantially implemented on a single CMOS integrated circuit is described. By incorporating controls for sleep and wake-up mode transitions in the processor's control logic, improved power savings with reduced latency is provided, obviating the need for hardware-focused solutions with elaborate signaling mechanisms. A fully integrated power management with staged wake-up operations controlled by the MAC solution consumes less power than the conventional wireless LAN solutions in standby mode.

Abstract: An adaptive electronic transmission signal cancellation circuit for separating transmit data from receive data in bidirectional communication system operating in full duplex mod is disclosed. The output of a main transmitter responsive to a first bias current is connected to the output of a receiver through an internal resistor. A first replica transmitter responsive to a second bias current and matched to the main transmitter current gain and rise/fall time characteristics is connected to the input terminal of the receiver, and produces a cancellation voltage between the output terminal of the main transmitter and the input terminal of the receiver as a function of the second bias current and the internal resistor.

Abstract: The invention provides a system and method for updating software in the CPU of a network device without interrupting the operation of the network device. The invention determines whether operating state information is recoverable. If it is not recoverable, then it will be stored in a metadata module or reload buffer. When the CPU is rebooted, after a software update or crash, it operates in a special reload mode and is able to recover any system state information not available in the network device from the metadata module.

Abstract: Aspects of a method and system for simultaneous signal transmission on multiple selected frequencies may include generating from a single baseband signal, a plurality of radio frequency transmission signals each at a different radio frequency, wherein the single baseband signal comprises an in-phase signal component and/or a quadrature signal component. The single baseband signal, to generate said plurality of radio frequency transmission signals, may be modulated in a single radio frequency transmission chain, the radio frequency transmission chain comprising intermediate frequency modulation and radio frequency modulation. The plurality of radio frequency transmission signals may be a radio frequency signal and a corresponding image frequency signal, based on the intermediate frequency modulation and the radio frequency modulation.

Abstract: A technique to use an auxiliary varactor coupled to a tuning varactor, in which a temperature compensated bias signal adjusts a bias on the auxiliary varactor to maintain a voltage controlled oscillator (VCO) from drifting in frequency as operating temperature for the VCO changes.

Abstract: A secure processor such as a TPM generates one-time-passwords used to authenticate a communication device to a service provider. In some embodiments the TPM maintains one-time-password data and performs the one-time-password algorithm within a secure boundary associated with the TPM. In some embodiments the TPM generates one-time-password data structures and associated parent keys and manages the parent keys in the same manner it manages standard TPM keys.

Abstract: A direct conversion tuner down-converts television signals, cable signals, or other signals directly from an RF frequency to an IF frequency and/or baseband, without an intermediate up-conversion step for image rejection. The direct conversion tuner includes a pre-select filter, an amplifier, an image reject mixer, and a poly-phase filter. The pre-select filter, amplifier, and the image reject mixer can be calibrated to provide sufficient image rejection to meet the NTSC requirements for TV signals. The entire direct conversion tuner can be fabricated on a single semiconductor substrate without requiring any off-chip components. The tuner configuration described herein is not limited to processing TV signals, and can be utilized to down-convert other RF signals to an IF frequency or baseband.

Abstract: Secure access and processing of an encryption/decryption key may include generating one or more keys within a key controller block of a chip. The generated keys may be transferred from the key controller block of the chip to an on-chip bus interface block via a secure serial link. The transferred keys may be stored in registers which may be accessible by only the key controller block of the chip. In this regard, the generated keys may be written to one or more of the key registers only by the key controller block. Furthermore, a written key may be read from a key register only by the key controller block. During the transfer of a generated key, a data valid signal may be used to indicate valid keys in a data signal used to transfer the keys via the secure serial link.

Abstract: A network node module within a vehicle operates to manage devices coupled to a vehicular communication network of the vehicle based on a use mode defining rights and privileges for operating in the vehicular communication network. Upon being configured in accordance with a particular use mode of a set of use modes, the network node module can identify a device coupled to the vehicular communication network and enable the device to operate within the vehicular communication network in accordance with the use mode. The network node module is securely reconfigurable to any use mode in the set of use modes.

Abstract: Aspects of a method and system for detecting interrupts from detachable electronic accessories or peripherals are provided. In this regard, a hardware audio CODEC may be operable to compare a voltage on one or more biased pins of an accessory or peripheral port to one or more reference voltages and filter one or more output signals generated from the comparison. When an accessory or peripheral is coupled to the accessory or peripheral port, interrupts from the accessory or peripheral may be detected based on results of the comparison and/or the filtering. An interrupt may be detected when the voltage on the one or more pins may be below the one or more reference voltages. An interrupt may be detected when the voltage on the one or more pins may be below the one or more reference voltages for a plurality of consecutive clock cycles.

Abstract: A circuit includes a package substrate that supports an on-chip gyrating circuit that generates a motion parameter based on motion of the circuit. The package substrate further supports a die that supports a processing module that processes the motion parameter to produce motion data, wherein the processing module further generates a receive control signal and a transmit control signal in accordance with the motion data. The die further supports a wireless local area network transceiver that generates an outbound RF signal that includes outbound data and that generates voice inbound data from an inbound RF signal, wherein the wireless local area network transceiver is further operable to adjust a receive parameter based on the receive control signal and to adjust a transmit parameter in response to the transmit control signal.

Abstract: Methods and systems for enabling communication of information within a network are disclosed herein and comprise receiving at a first communication device located within a network, configuration information from a network service provider for configuring a plurality of communication devices located within said network. The first communication device located within the network can be configured based on at least a portion of the received configuration information. In response to a user input at a second communication device located within the network, at least a portion of the received configuration information can be communicated from the first communication device to the second communication device located within the network. The network service provider can be coupled to the first communication device via a wired connection. The network can comprise a wireless network.

Abstract: A technique for receiving paging information helps a mobile communication device with multiple SIMs to better determine that a call is incoming. Despite the paging indicators for both SIMs arriving in a manner that prevents both the paging indicators from being received, the technique is able to ascertain whether a SIM is being paged, even when the other SIM is currently on the radio interface. As a result, the mobile communication device exhibits an increased ability to detect and alert the user to incoming calls.

Abstract: User equipment with multiple subscriber identity modules (SIMs) includes techniques for intelligently allowing the SIMs to access the radio resources. In one aspect, the techniques determine whether a network signaling criteria is satisfied. When the network signaling criteria is satisfied, the user equipment may communicate a signaling connection release indication to a network controller handling a first SIM network connection. When the network signaling criteria is not satisfied, however, the user equipment may forgo communicating the signaling connection release indication to the network controller handing the first SIM network connection. In either case, the user equipment may locally deactivate the first SIM network connection so that the radio frequency interface may be transitioned to a second SIM.

Abstract: Embodiments of the present disclosure use shared oscillator for cellular communications and location detection in a communication device. The communications device estimates a frequency offset of one of its subsystems. The communications device determines a frequency offset that results from drifting of this shared oscillator, typically caused by aging and/or changes in temperature, voltage, humidity, pressure, and/or vibration to provide some examples, from the frequency offset this subsystem. The communications device provides various compensation parameters to its various subsystems to compensate for the frequency offset that results from drifting of the oscillator.

Abstract: A scheduling technique is described for discontinuous transmission and reception. The scheduling technique may be implemented in a mobile communication device with multiple SIMs. The scheduling technique facilitates enhanced communication capability for the mobile communication device. In one implementation, the scheduling technique helps avoid substantial overlap between discontinuous receive cycles of the SIMs, for example by renegotiating a discontinuous transmit/receive offset if too much overlap exists. The renegotiation process may be incorporated into a future industry standard communication protocol (e.g., 3GPP release 11 or later), or may be implemented as an extension to an existing communication protocol.

Abstract: Wireless communication devices are disclosed that are capable of selecting and changing signal polarities depending on channel conditions in order to improve or optimize communication therebetween. When a first polarization direction is deemed inadequate, the devices can switch to communicating via a second polarization. In addition, information relating to received signal qualities in the different polarizations can be stored in each device to allow for quick and efficient exchanges between configurations. Finally, when conditions warrant, the devices can enter a dynamic polarization configuration in which signal polarizations are switched rapidly so as to enjoy benefits of diversity.