This disclosure describes methods and apparatus to promote sustainable usage of smartphones such as preventing phone loss, preventing overheating and overcharging, and decreasing packaging waste. A method and apparatus to prevent phone loss is disclosed. Radio frequency beacons (or tags) attached to the owner transmit signals to the smartphone. The distance of the owner from the smartphone is estimated based on the quality of the received radio frequency signals in the smartphone. The system alerts user whenever the distance gets farther than a preset value. A method and apparatus to prevent overcharging of the battery is also disclosed. A plugging mechanism is presented that will be automatically detached from the smart phone when the battery is fully charged. Moreover, an alerting system is disclosed that alerts the user to stop using the device when the internal temperature of the device gets hotter than a preset threshold.

A method and apparatus for performing coordinated communication between radio access points in a communication system are provided. The method includes receiving, by a first radio access point, a message requesting channel information from a second radio access point, transmitting, by the first radio access point, a response message in reply to the message requesting channel information to the second radio access point, transmitting, by the first radio access point, a message reporting the channel information to the second radio access point, and receiving, by the first radio access point, resource allocation information for Coordinated Multi-Point transmission and reception (CoMP) from the second radio access point.

A method and apparatus for performing coordinated communication between radio access points in a communication system are provided. The method includes receiving, by a first radio access point, a message requesting channel information from a second radio access point, transmitting, by the first radio access point, a response message in reply to the message requesting channel information to the second radio access point, transmitting, by the first radio access point, a message reporting the channel information to the second radio access point, and receiving, by the first radio access point, resource allocation information for Coordinated Multi-Point transmission and reception (CoMP) from the second radio access point.

Disclosed in the present disclosure are a method for reporting channel state information (CSI) in a wireless communication system, and a device therefor. Specifically, a method for user equipment CUE) to report channel state information (CSI) in a wireless communication system comprises: a step for receiving CSI-related configuration information from a base station (BS); a step for receiving a reference signal from the base station; a step for calculating the CSI on the basis of the reference signal; and a step for transmitting the CSI to the base station.

In an aspect, a communications device obtains a residual AoA bias associated with a first AoA measurement of a RS-P transmitted from a wireless reference node to a first base station, the wireless reference node associated with a location known to the communications device, obtains a second AoA measurement associated with an uplink signal (e.g., PRACH, SRS, UL-SRS-P, etc.) transmitted from a UE to the first base station, and calibrates the second AoA measurement based on the residual AoA bias. In another aspect, a communications device obtains a residual AoD bias associated with a first AoD measurement of a RS-P transmitted from a first base station to a wireless reference node with a known location, obtains a second AoD measurement associated with a downlink signal (e.g., DL-PRS) transmitted from the first base station to a UE, and calibrates the second AoD measurement based on the residual AoD bias.

In an aspect, a communications device obtains a residual AoA bias associated with a first AoA measurement of a RS-P transmitted from a wireless reference node to a first base station, the wireless reference node associated with a location known to the communications device, obtains a second AoA measurement associated with an uplink signal (e.g., PRACH, SRS, UL-SRS-P, etc.) transmitted from a UE to the first base station, and calibrates the second AoA measurement based on the residual AoA bias. In another aspect, a communications device obtains a residual AoD bias associated with a first AoD measurement of a RS-P transmitted from a first base station to a wireless reference node with a known location, obtains a second AoD measurement associated with a downlink signal (e.g., DL-PRS) transmitted from the first base station to a UE, and calibrates the second AoD measurement based on the residual AoD bias.

Disclosed are a method and an apparatus for measuring signal quality in a wireless communication system.

A method for controlling measurement includes that: the terminal receives a cross-link interference (CLI) measurement configuration from a network device, where the CLI measurement configuration includes at least one sounding reference signal (SRS) resource configuration, each of the at least one SRS resource configuration being associated with at least one of a cell identity or an SRS index; and the terminal performs a CLI measurement according to the CLI measurement configuration, where the CLI measurement refers to that the terminal measures an SRS of another terminal. A terminal and a non-transitory computer-readable storage medium are also provided.

Various examples and schemes pertaining to resource allocation enhancements for sidelink (SL) communications are described. A user equipment (UE) receives from a peer UE a sidelink control information (SCI) signal indicating a reserved resource. The UE then determines whether the reserved resource is acceptable by performing a reference signal received power (RSRP)-based comparison. Depending on a result of the determining, the UE performs a transmission to either the peer UE or one or more other UEs.

An ultra-low power data transmission method and apparatus are disclosed. An ultra-low power data transmission method to be performed by a user terminal of an ultra-low power data transmission system includes performing channel coding on a payload included in a transmission packet; interleaving a payload obtained through the channel coding, spreading the interleaved payload using a gold code and an orthogonal variable spreading factor (OVSF), combining a synchronization header spread using the gold code and the OVSF with the spread payload, and modulating a transmission packet in which the payload and the synchronization header are combined.