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.

A user equipment (UE) may enter a dormant state for a secondary cell group (SCG) of a secondary network (SN) having a primary serving cell (PSCell). The UE may maintain an uplink parameter set for the PSCell while the SCG is dormant for the UE. For example, the UE may receive a parameter change message from either the SN or a master network (MN) and transmit a parameter change acknowledgment to either the SN or the MN. The UE may transmit a periodic measurement report for at least the PSCell to the PSCell of the SN based on the uplink parameter set.

A Wireless-Fidelity (Wi-Fi) communication control method of a vehicle includes: determining a Wi-Fi communication state of the vehicle at a current position; selecting a Wi-Fi channel having a low communication load according to the Wi-Fi communication state of the vehicle at the current position; and forming a Wi-Fi zone in the vehicle using the selected Wi-Fi channel.

A wireless communication system performing wireless communication in carrier sense multiple access/collision avoidance system is provided. The wireless communication system includes: remote controllers that corresponding to control targets and transmitting control information for controlling each of the control targets through wireless communication; and an access point that receives and relays the control information to a control apparatus of the control target. The access point includes an access point side wireless communication control portion transmitting a beacon signal and performing wireless communication with each of the remote controllers. Each of the remote controllers includes a remote controller side wireless communication control portion performing wireless communication with the access point. The remote controller side wireless communication control portion performs a carrier sense for a predetermined carrier sense period. The remote controller side wireless communication control portion transmits the control information, and shortens the carrier sense period for a next carrier sense.

A method for reducing the number of the times of switching communication channels and a mobile device are provided. The method includes following steps: determining whether the mobile device is at a stationary state or a semi-stationary state according to a plurality of location information of the mobile device during a predetermined time interval; recognizing an area where the mobile device is located and a communication mode of the mobile device when the mobile device is at the stationary state or the semi-stationary state; establishing a transmission power variation table according to a plurality of transmission powers used by the mobile device at the communication mode; searching for a specific transmission power which is most frequently used from the transmission power variation table; increasing a lowest allowable transmission power of the mobile device to a target transmission power higher than the specific transmission power; and recording the target transmission power.

A multi-radio wireless device capable of communicating on several wireless communication protocols (WCP) such as Wi-Fi, Bluetooth, etc. while avoiding on-device interference between radios operating using different WCPs. The device may measure an isolation value between radios during a calibration phase. During runtime operations, if a transmit activity is detected, the device may set a maximum receive gain using the expected transmit power and the isolation value. If a receive activity is detected, the device may set a maximum transmit power using an expected receive gain and the isolation value. The maximum receive gain and/or transmit powers may be obtained from a lookup table matching receive gain values to reference values where the reference values are a combination of transmit powers and isolation values.

A wireless first device may receive a packet from another device from an overlapping basic service set (OBSS). A received power of the packet may be greater than a threshold for transmitting during the time of the packet. If the first device reduces its transmit power, the first device may increase the threshold. If the received power is less than the increased threshold, the first device may count down a backoff count during a transmission time or transmission opportunity of the packet. In some cases, after the transmission time or transmission opportunity, the first device may increase its transmission power. In some cases, the condition for counting down a backoff count may also include initiating or finishing the transmission during the transmission time or the transmission opportunity of the packet, or transmitting at the reduced power.

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.

Disclosed is a channel detection method applied to a wireless local area network device, including: measuring a channel before data are transmitted; and determining a Clear Channel Assessment (CCA) threshold according to a corresponding relation among a channel measurement result, transmitting power levels and channel access parameters, and judging whether a state of the channel is idle according to the CCA threshold. The present application further discloses a channel detection apparatus.

A method and device for controlling power, and a base station are provided. The method includes: when the service type of User Equipment (UE) is a pre-designated service type, acquiring a Hybrid Automatic Repeat Request (HARQ) process activation/deactivation flag of the UE; and in a deactivated HARQ process corresponding to the HARQ process deactivation flag of the UE, adjusting at least one of the power control related parameters, so as to reduce the transmit power of the UE. Through the embodiment of the present disclosure, when a certain HARQ process is deactivated, the base station can notify the UE to reduce the transmit power, so as to reduce the uplink interference, thereby increasing the uplink capacity of system, reducing unnecessary power waste and prolonging the standby time of the UE.