An in-vehicle authentication device may perform wireless communication with a portable device in a vicinity of a vehicle. The in-vehicle authentication device may transmit a call signal that requests a reply of a response signal to the portable device. The in-vehicle authentication device may transmit an authentication request signal that requests a reply of an authentication signal to the portable device when the in-vehicle authentication device determines that the portable device exists in the vicinity of the vehicle by receiving the response signal. The in-vehicle authentication device may authenticate the portable device that transmits the authentication signal based on the authentication signal when the authentication signal is received.

A Bluetooth component (e.g., a Bluetooth chip) and a digital signal processing (DSP) component (e.g., an audio DSP) of a device may directly handle link condition sensing (e.g., link quality monitoring) and audio bitrate determination. The Bluetooth component may perform link condition sensing (e.g., link quality monitoring) and the Bluetooth component and/or the DSP component may perform link condition processing and audio bitrate determination. Encoding scheme (e.g., audio bitrate) determination and modification may be performed independently by the Bluetooth component and DSP component, such that encoding schemes may be adapted to link conditions while other hardware (e.g., connected to the DSP) is operating in a low power or sleep state. In some cases, the Bluetooth component may sense link conditions and transmit bitrate information directly to audio encoding blocks of the DSP component.

The invention relates to a method and an arrangement for reducing power consumption of a receiver in a mobile communication network comprising a sender transmitting packet data on a downlink channel to one or more receivers over a radio interface. Inactive time instants and listening time instants are defined according to provided rules. The receiver is arranged to listen for information from the sender during the listening time instants and to sleep during the inactive time instants. Thus, less power will be consumed during the inactive time instants.

The present disclosure discloses a method, a terminal device and a system for controlling transmission, relating to the field of terminal technology. In the method for controlling transmission provided by the present embodiment, a user type of a current user is acquired, and when it is determined that the user type of the current user is the user type specified to reduce radiation, the terminal device reduced a default transmission power, thereby solves the problem of strong radiation generated by a terminal device in the prior art, which adopts a default transmission mechanism for optimal signal, and further achieves an effect of reducing radiation for the user types that need to reduce radiation.

The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.

A base station transmits a message indicating a small data transmission (SDT) time window for an SDT in a radio resource control (RRC) inactive state. The base station receives, during the SDT time window, an initial uplink transmission that is based on a first power control adjustment (PCA) state being reset to zero. The base station receives a second uplink transmission that is based on a second PCA state, wherein, in response to the second uplink transmission being subsequent to the initial uplink transmission during the SDT time window, the second PCA state is based on the first PCA state and one or more transmit power control command values transmitted during the SDT time window.

The performance and ease of management of wireless communications environments is improved by a mechanism that enables access points (APs) to perform automatic channel selection. A wireless network can therefore include multiple APs, each of which will automatically choose a channel such that channel usage is optimized. Furthermore, APs can perform automatic power adjustment so that multiple APs can operate on the same channel while minimizing interference with each other. Wireless stations are load balanced across APs so that user bandwidth is optimized. A movement detection scheme provides seamless roaming of stations between APs.

In a reverse link of a wireless CDMA communication system, a method of maintaining an idling mode connection between a field unit and a base transceiver station is provided using various techniques to maintain the idle mode connection at a reduced power level. A preferred embodiment computes a time slot or frame offset based on modulo function using a field unit identifier in order to distribute field unit maintenance transmissions among available slots or offsets. An alternate embodiment detects explicit signaling states changes at the physical layer and causes power target changes. A further embodiment transmits maintenance data during predetermined time intervals, coordinated between the field units and BTS, allowing power levels to be adjusted accordingly.

A method for wireless communication is described. The method includes receiving a silent indication (SID) start message from a modem at a Bluetooth (BT) module when the modem detects a silent period in a voice call. The method also includes sending the SID start message from the BT module to a remote BT device. The method further includes disabling a BT transmitter during the silent period based on the SID start message received from the modem.

Logic may comprise hardware and/or code to coordinate communications of wireless communications devices to reduce power consumption by stations. Logic may coordinate communications in an access point. Logic may generate and transmit a wake frame from the access point to the station to wake the receive circuitry of the station. Logic of the station may wake the receive circuitry from an idle mode, which may be a less linear and less sensitive mode, to a receiver (RX) active state, which is a high linear and high sensitivity mode. Once the receiver circuitry enters the RX active state, the station is ready to receive a transmission. Logic may implement the wake frame as a medium access control frame or as a null data packet, physical layer frame.