According to an aspect of the inventive concept, there is provided a headend apparatus, including: a spectrum analysis unit analyzing frequency spectrums of a plurality of base station signals to detect characteristic information of the plurality of base station signals; a control unit transmitting the characteristic information to a network management server connected to the headend apparatus and outputting power control information, generated based on the characteristic information, received from the network management server; and a plurality of RF units receiving at least one of the plurality of base station signals and controlling power of the plurality of base station signals based on the power control information and outputting the plurality of base station signals.

According to an aspect of the inventive concept, there is provided a headend apparatus, including: a spectrum analysis unit analyzing frequency spectrums of a plurality of base station signals to detect characteristic information of the plurality of base station signals; a control unit transmitting the characteristic information to a network management server connected to the headend apparatus and outputting power control information, generated based on the characteristic information, received from the network management server; and a plurality of RF units receiving at least one of the plurality of base station signals and controlling power of the plurality of base station signals based on the power control information and outputting the plurality of base station signals.

The invention discloses a method for reducing an SAR value of a mobile terminal, a storage medium and a mobile terminal. The method comprises: detecting and comparing signal strengths of an upper antenna and a lower antenna of the mobile terminal in real time during a call; and when it is detected that the signal strength of the upper antenna of the mobile terminal is greater than that of the lower antenna, switching the communication work of the mobile terminal to the upper antenna, and reducing the radio frequency transmitting power of the upper antenna. By adoption of the scheme, the SAR value of the mobile terminal can be reduced.

A method and an apparatus are provided for receiving information by a terminal in a wireless communication system. The method includes transmitting, to a base station, a request message including a preamble; receiving, from the base station, a response message including uplink resource information determined based on the preamble; determining at least one of downlink channel information and uplink transmission capability corresponding to a specific uplink transmission; and transmitting, if an information request message is received from the base station, the at least one of the downlink channel information and the uplink transmission capability to the base station.

A method for power control includes: setting a transmission power for a small cell; determining periodically, when the small cell is operated with a low transmission power, whether a Reference Signal Receiving Quality RSRQ value corresponding to a User Equipment UE with worst channel quality in a serving cell is less than a preset RSRQ threshold; and augmenting the transmission power by a step value when the RSRQ value is less than the preset RSRQ threshold.

A method for power control includes: setting a transmission power for a small cell; determining periodically, when the small cell is operated with a low transmission power, whether a Reference Signal Receiving Quality RSRQ value corresponding to a User Equipment UE with worst channel quality in a serving cell is less than a preset RSRQ threshold; and augmenting the transmission power by a step value when the RSRQ value is less than the preset RSRQ threshold.

Systems, methods, apparatuses, and computer program products for real-time uplink (UL) power control are provided. One method may include estimating, by a network node, a power allocation function for determining power allocation across a plurality of legs that transmit simultaneously, the power allocation function being based on radio channel statistics and network performance metrics. The method may then include signaling, to a user equipment, the power allocation function and the parameters used to compute an output of the power allocation function.

The present disclosure relates to a 5G or pre-5G communication system which is provided to support a higher data transmission rate after 4G communication systems such as LTE. A first electronic device according to an embodiment of the present invention comprises a control unit, an input unit, an output unit and a communication unit. The input unit recognizes occurrence of a touch input for transmitting or receiving contents, and the communication unit, on the basis of the received signal strength of a search signal or a response signal received from at least one other electronic device, transmits the contents to the at least one other electronic device or receives the contents from the at least one other electronic device.

An observation system includes a plurality of nodes and an observation apparatus that collects information from the nodes using multi-hop communication for communicating with the nodes. The observation apparatus includes a link quality indicator (LQI) determination section and an output control section. The LQI determination section determines whether an LQI received from a node using the multi-hop communication is larger than a first threshold. When the LQI is larger than the first threshold, the output control section outputs a reduction command to the node associated with the LQI, the reduction command being a command to change the amount of transmission power in the multi-hop communication.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The apparatus may receive a transmission over a precoded channel. The transmission may include a layer having a plurality of symbols, each symbol having a plurality of modulated tones precoded on a per-tone basis. The receive layer may be associated with a power delay profile. The apparatus may estimate the precoded channel based on a time support of the power delay profile.