Abstract:
Un método para la coexistencia de un receptor de acceso múltiple por división de frecuencia ortogonal (OFDMA) (117) tal como un receptor WiMAX tal como un transmisor basado en tramas sincrónicas (115) tal como un transmisor de Bluetooth en una estación móvil (110) recibe una señal calculada de protocolo de acceso medio (MAP´) que indica cuándo el receptor de OFDMA (117) espera recibir un mensaje de MAP y lo utiliza en una señal de apagado de Bluetooth (190) al menos cuando se espera recibir un mensaje de MAP. La señal de MAP´ puede tomarse directamente del transceptor de OFDMA (117) o puede producirse mediante el análisis de una señal de habilitación de receptor (RXE) que incluye no solamente los símbolos de MAP sino también los símbolos de datos de enlace descendente. La señal de RXE puede analizarse utilizando técnicas de interrupción y temporizador, Transformada Rápida de Fourier, covarianza, y de circuito de bloqueo de retraso para extraer información histórica de símbolos de MAP y generar información de los símbolos MAP esperados. El apagado de un transmisor de Bluetooth durante la recepción de mensajes de MAP esperados le permite el receptor de OFDMA mantener la sincronía con un punto de acceso sin requerir simultáneamente que el transmisor de Bluetooth se apague cada vez que el receptor de OFDMA desea recibir un símbolo de OFDMA.
Abstract:
A method for coexistence of an orthogonal frequency division multiple access (OFDMA) receiver (117) such as a WiMAX receiver with a synchronous frame-based transmitter (115) such as a Bluetooth transmitter within a mobile station (110) receives an estimated media access protocol (MAP') signal indicating when a MAP message is expected to be received by the OFDMA receiver (117) and uses it at a Bluetooth shutdown signal (190) at least when a MAP message is expected to be received. The MAP' signal can be taken directly from the ODFMA transceiver (117) or it may be produced through analysis of a receiver-enable (RXE) signal that includes not only MAP symbols but also downlink data symbols. The RXE signal can be analyzed using interrupt-and-timer, Fast Fourier Transform, covariance, and/or delay-locked loop techniques to extract historical MAP symbol information and generate expected MAP symbol information. Shutting down a Bluetooth transmitter during expected MAP message receipt permits the OFDMA receiver to maintain synchronicity with an access point while not requiring the Bluetooth transmitter to shut down every time the OFDMA receiver expects to receive an OFDMA symbol.
Abstract:
Described are a method and a Bluetooth device that upon powering up (202), the device automatically enters (306) discoverable mode without user intervention when its paired device list is empty (304). Also described is emptying (206) the paired device list. Further described is a method and Bluetooth device having one or more devices listed in its paired device list and wherein attempts are made at communication with the listed devices in one or more predetermined manners and if the attempts are not successful, automatically entering discoverable mode (306). Still further described is a method and device for attempting communication with the previously paired devices which may be interposed with entering into discoverable mode until either one is successful.
Abstract:
Disclosed are a queue controller and method thereof for dual mode I/O devices and methods for transmission of a short range radio link such as a Bluetooth link that is a bi-directional real-time audio communication signal that can be over a first transport or a second transport. The described queue controller can transform a single input queue having heterogeneous packet types to a queue having homogeneous packet types in a case where heterogeneous audio packet types are anticipated. According to control signals that can be based upon operating conditions and transport selection, a first control signal or a second control signal can control the single input queue transformation. After a transport is selected, a single input queue can be processed by a queue controller configured to transform the single input queue having heterogeneous packet types to a queue having homogeneous packet types.
Abstract:
In a method of controlling power level of transmit signals from a wireless communication device that is communicating with a plurality of wireless ad-hoc network nodes as part of an ad-hoc network, a value of a usage parameter of a communication between the wireless device and a first wireless ad-hoc network node of the plurality of nodes is detected. A power level of a transmit signal from the wireless device to the first wireless ad-hoc network node is set to a level corresponding to the value of the usage parameter. A device for adjusting a power level in a wireless device includes a parameter detection circuit, that detects a parameter indicative of a relationship between the wireless device and a wireless ad-hoc network node, and a power selection circuit that sets a transmit signal power level from the wireless device to a level corresponding to the parameter detected by the parameter detection circuit.
Abstract:
A multimedia device (100) including a separating entity configured to separate a multimedia stream into audio frames and video frames, a sequencing entity configured to add a sequence number to at least one audio frame, a transceiver configured to transmit audio frames to a remote audio device, a controller coupled to a video player, the controller configured to determine a delay associated with transmitting the audio frames to the remote audio device based upon the sequence number and to control the presentation of the video frames at the video player based on the delay.
Abstract:
Disclosed are dual mode I/O devices and methods for transmission of a short range radio link such as a Bluetooth link that is a bi-directional real-time audio communication signal that can be over a synchronous circuit-switched transport and an asynchronous packet-switched transport either sequentially or simultaneously. Also disclosed are dual mode wireless headset systems and methods of at least two dual mode I/O devices and more particularly including a wireless audio terminal and an audio gateway for transmission of a bi-directional real-time audio communication signal that can be over a synchronous circuit-switched (SCO) transport and an asynchronous packet-switched (ACL) transport either sequentially or simultaneously. Having both SCO and ACL modes available may allow the user to optimize voice quality or data throughput under different operating conditions. The user may benefit from better Bluetooth voice quality and may have the flexibility of using either mode depending upon the situation.