In vehicle-to-vehicle (V2V) or vehicle-to-everything (V2X) communication, the vehicle may wirelessly transmit a signal. However, transmission of a signal using a fixed transmit power may not be desirable. The transmit power should be adjusted based on various factors such as a vehicle speed and a priority level of the vehicle. The apparatus may be a device capable of wireless communication, and may be in a vehicle. The device determines one or more parameters associated with a vehicle including the device, the parameter including at least one of a speed of the vehicle or a priority level of the vehicle. The device sets a transmit power of the device based on the one or more parameters. The device transmits a message via wireless communication using the set transmit power.

A radio communication apparatus according to one embodiment is mounted on a vehicle (V), configured to perform vehicle-to-vehicle communication with another vehicle by using a predetermined frequency band. The radio communication apparatus comprises a controller configured to control a transmission power and/or a transmission directivity in the vehicle-to-vehicle communication to restrain generation of interference in the predetermined frequency band, based on a congestion situation parameter regarding a congestion situation of a road (R) on which the vehicle travels.

Management of context and power control information enables different power control schemes for point-to-point or point-to-multipoint based on proximity services or applications. Context information may be defined as situation data about a service or application that is used to help define a power control scheme to be implemented. Power control information may be defined as control or status data for power control, which can be used for reporting or controlling the transmitting power of a peer in a P2P network. Context and power control information may be managed across multiple layers such as the application layer, service layer, media access control layer, or physical layer. Context and power control information is updated and exchanged between or among peers for context-related power control in proximity services.

Systems and methods are disclosed for providing a radio operation switch based on mobility data. In one embodiment, a mobile base station is disclosed, comprising: a global positioning system (GPS) module for determining a current location of the mobile base station; a velocity module coupled to the output of the GPS module for determining a current velocity of the mobile base station; and a controller, the controller configured to perform steps comprising: determining the current velocity of the mobile base station using the velocity module; comparing the current velocity to a threshold; and switching, based on the comparison, from a first radio band to a second radio band.

Systems and methods for an in-vehicle base station are described. In one embodiment, a mobile base station is disclosed comprising a first access radio for providing an access network inside and outside a vehicle; a second backhaul radio for providing a backhaul connection to a macro cell; and a global positioning system (GPS) module for determining a location of the mobile base station, and for transmitting the location of the mobile base station to a core network, wherein a transmit power of the first access radio is configured to increase or decrease based on a speed of the vehicle.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for adjusting the transmission power of an unmanned aerial vehicle are disclosed. In one aspect, a method includes the actions of determining, by an unmanned aerial vehicle that includes a radio transceiver, an altitude of the unmanned aerial vehicle and a distance between the unmanned aerial vehicle and a base station. The actions further include, based on the altitude of the unmanned aerial vehicle and the distance between the unmanned aerial vehicle and the base station, determining, by an unmanned aerial vehicle, a transmission power level for the radio transceiver. The actions further include communicating, by the unmanned aerial vehicle, with the base station using the radio transceiver operating at the transmission power level.

The processing circuit of an inter-vehicle communication device includes a transmission output correction table in which a transmission power value or a corrected transmission power value in accordance with propagation characteristics of radio waves transmitted from an own vehicle is set to correspond to a region with coordinates having a direction of travel of the own vehicle as an axis. The processing circuit acquires a transmission power value or a corrected transmission power value corresponding to relative position coordinates of a peripheral vehicle from the transmission output correction table, and determines transmission power for when transmitting own vehicle travelling information to the peripheral vehicle. Because of this, communication with the peripheral vehicle positioned in a region in which radio wave propagation characteristics are sparse can be reliably established, and communication congestion can be avoided.

Aspects of the present disclosure provide various apparatuses and methods for extending a reference signal to facilitate carrier aggregation (CA). In some examples, a network includes a primary cell and one or more secondary cells that use a millimeter wave (mmW) carrier. When a UE is beyond the range of a reference signal from the secondary cell, the primary cell may trigger the secondary cell to increase the range of its reference signal using a higher gain beam and/or reference signal repetition.

An access device of a communication network system calculates power estimation values for successive time slots of a communication channel based on measurement values for the successive time slots from a user equipment accessing the communication network system via the access device. The access device performs transmit power control based on the power estimation values. If a compressed mode is active for the user equipment, from use for the transmit power control, power estimation values or measurement values for predetermined time slots are excluded, which include no time slot or at least one time slot before a first time point T1 at which the user equipment has entered the compressed mode, at least one time slot after a second time point T2 at which the user equipment has returned from the compressed mode, and each time slot between the first time point T1 and the second time point T2.

Systems and methods for an in-vehicle base station are described. In one embodiment, a method is disclosed, comprising: broadcasting, using the first access radio, the cellular access network at a first power; transmitting the location of the mobile base station to the cellular network; detecting, at the processor, a transition of the mobile base station from a stationary state to a moving state; reducing, at the first access radio, a transmit power of the cellular access network while in the moving state for disabling the cellular access network outside the vehicle; and increasing, at the first access radio, the transmit power of the mobile base station when exiting the moving state.