The invention relates to methods for informing an eNodeB on the transmit power status of a user equipment in a mobile communication system using component carrier (CC) aggregation. Furthermore, the invention is also related to the implementation of these methods by hardware and their implementation in software. The invention proposes procedures that allow the eNodeB to recognize the power usage status of a UE in a communication system using carrier aggregation. The UE indicates to the eNodeB, when the UE is close to using its total maximum UE transmit power or when it has exceeded same. This is achieved by the UE including indicator(s) and/or new MAC CEs to one or more protocol data units transmitted on respective component carriers within a single sub-frame that is providing the eNodeB with power status information. The MAC CEs may report a per-UE power headroom. Alternatively, the MAC CEs may report per-CC power headrooms and/or power reductions applied to the respective uplink CCs.

The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a terminal controlling uplink power in a carrier aggregation-based wireless communication system, comprising the steps of: configuring a first cell and a second cell; transmitting a first PUCCH signal from subframe #n in the first cell; and transmitting a second PUCCH signal from subframe #n in the second cell, wherein when the sum of transmit power of the first PUCCH signal and transmit power of the second PUCCHJ signal exceeds a predetermined maximum transmit power configured to the terminal, the transmit power of the PUCCH signal having a lower priority from among the first UCCH signal and the second PUCCH signal is reduced or the transmission is dropped.

Systems, apparatus, user equipment (UE), evolved node B (eNB), and methods are described for generating an extended power headroom report (ePHR) based on an uncertainty associated with a physical downlink control channel communication granting an uplink grant for a physical uplink shared channel communication when the system is configured for simultaneous physical uplink shared channel and physical uplink control channel communications. Some embodiments are structured to generate the ePHR using a type 2 report regardless of the uncertainty associated with the ePHR, while other embodiments generate the ePHR using a reference format. In some embodiments, a UE communicates a timing field with a UE capability communication indicating whether the UE meets timing requirements to avoid uncertainty in ePHR communications.

An unlicensed carrier power control method is provided. Multiple transmitted power constraint parameters are acquired, and a minimum value in the multiple transmitted power constraint parameters is determined. Power control is performed according to the minimum value in the multiple transmitted power constraint parameters. An unlicensed carrier power control device and a storage medium are also provided.

We disclose various embodiments of methods and apparatus for processing handovers of mobile terminals between base stations of a wireless communication system. An example handover algorithm used for this purpose enables the handover threshold to be increased for some mobile terminals, on a terminal-by-terminal basis, thereby individually expanding the range of the serving cell for each of such terminals. In an example embodiment, the handover-threshold determination is carried out based on physical-resource-block usage of the target cell. The extent of the cell-range expansion depends on whether or not the reference signals of the serving and target cells interfere with each other. Embodiments of the disclosed handover algorithm can advantageously reduce the number of failed handovers by allowing some communication sessions to run to completion before a handover is triggered.

Device-to-device (D2D) cross link power control systems and methods may be disclosed. For example, a device such as a UE or WTRU may determine whether it may have simultaneous transmissions where at least one of the transmissions may include a cross link transmission. The device may further determine whether a total transmit power of the simultaneous transmissions may exceed a maximum transmit power of the device. If the device may have simultaneous transmissions and such transmissions may exceed the maximum transmit power, the device may reallocate power based on a priority or priority setting. The device may further determine a maximum cross link power, a maximum device power, and a cross link transmit power level such that the device may further control the power for transmissions based thereon.

Methods and devices for offloading and/or aggregation of resources to coordinate uplink transmissions when interacting with different schedulers are disclosed herein. A method in a WTRU includes functionality for coordinating with a different scheduler for each eNB associated with the WTRU's configuration. Disclosed methods include autonomous WTRU grand selection and power scaling, and dynamic prioritization of transmission and power scaling priority.

Methods and systems for preventing or delaying handovers to target access nodes that are not configured to provide uplink split mode, include determining that an uplink usage requirement or a power headroom of a wireless device meets a threshold, and preventing handovers of the wireless device to access nodes that are not capable of utilizing uplink split mode. Access nodes capable of utilizing uplink split mode are configured to receive uplink data via at least two different radio access technologies simultaneously, including 4G LTE and 5G NR.

A sending method for a Scheduling Request (SR) under carrier aggregation is provided. A User Equipment (UE) receives, through a Radio Resource Control (RRC) message, and stores Physical Uplink Control Channel (PUCCH) configuration information and SR configuration information of a plurality of serving cells, and, when determining that an SR needs to be sent, the UE selects, according to the SR configuration information, a serving cell from the plurality of serving cells corresponding to the stored PUCCH configuration information to send the SR. A sending device for a scheduling request under carrier aggregation, a terminal and a storage medium are also provided.

A method for providing a Power Headroom Report (PHR) is provided. In the method, a User Equipment (UE) receives configuration information of serving cells; a corresponding relationship between a first region of a PHR and the serving cells is determined according to the configuration information of the serving cells, and the first region is used for indicating whether power headroom information of one or more serving cells is contained in the PHR. Another method for providing the PHR, two devices for providing the PHR, and a computer storage medium are also provided.