Power headroom (PH) reporting for uplink transmissions

Abstract

Certain aspects of the present disclosure relate to an apparatus for wireless communication. In some examples, the apparatus may be a user equipment (UE), the user equipment (UE) is configured to select a power headroom (PH) value associated with a default PH configuration of the apparatus, a signal output for transmission to a first network node of a first serving cell of a first group of cells, or the signal output for transmission to a second network node of the first serving cell of the first group of cells. In some examples, the UE may output a PH report including the selected PH value for transmission to a second serving cell of the second group of cells, where the PH report is output via the first time slot for transmission.

Description

Background Art Technical Field

[0001] The present disclosure relates generally to communication systems, and more particularly to reporting power headroom (PH) for repeated transmissions to multiple transmit / receive points (mTRPs).

[0002] introduction

[0003] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0004] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, or even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continued mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Certain aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0005] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of these aspects. This summary is not an extensive overview of all contemplated aspects, and is neither intended to identify key or important elements of all aspects, nor to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description presented later.

[0006] Certain aspects relate to an apparatus for wireless communication, the apparatus comprising: a memory comprising instructions; and one or more processors configured to execute the instructions. In some examples, the apparatus is configured to: select a power headroom (PH) value associated with: a default PH configuration of the apparatus, a signal output of a first network node for sending to a first serving cell of a first cell group, or a signal output of a second network node for sending to the first serving cell of the first cell group. In some examples, the apparatus is configured to output a PH report including the selected PH value for sending to a second serving cell of a second cell group, wherein the PH report is output for sending via a first time slot. In some examples, the apparatus is configured to: output the signal for sending to the first network node or the second network node via at least one of the first time slot or a second time slot adjacent to the first time slot.

[0007] Certain aspects relate to an apparatus for wireless communication, the apparatus comprising: a memory comprising instructions; and one or more processors configured to execute the instructions. In some examples, the apparatus is configured to: output an indication of a first network node of a first service node or a second network node of the first service cell for transmission to a user equipment (UE), the first service cell being part of a first cell group, and the apparatus being part of a second service cell of a second cell group. In some examples, the apparatus is configured to: obtain a power headroom (PH) report from the UE, the power headroom (PH) report comprising a PH value associated with: a default PH configuration of the UE for communicating with the indicated first network node or second network node, or a signal sent by the UE to the indicated first network node or second network node.

[0008] Certain aspects relate to a method for wireless communication at a user equipment (UE). In some examples, the method includes: selecting a power headroom (PH) value associated with: a default PH configuration of the UE, a signal output of a first network node for sending to a first serving cell of a first cell group, or the signal output of a second network node of the first serving cell of the first cell group. In some examples, the method includes: outputting a PH report including the selected PH value for sending to a second serving cell of a second cell group, wherein the PH report is output for sending via a first time slot. In some examples, the method includes: outputting the signal for sending to the first network node or the second network node via at least one of the first time slot or a second time slot adjacent to the first time slot.

[0009] Certain aspects relate to a method for wireless communication at a network node. In some examples, the method includes: outputting an indication of a first network node of a first serving cell or a second network node of the first serving cell for transmission to a user equipment (UE), the first serving cell being part of a first cell group, the device being part of a second serving cell of a second cell group. In some examples, the method includes: obtaining a power headroom (PH) report from the UE, the power headroom (PH) report including PH values ​​associated with: a default PH configuration of the UE for communicating with the indicated first network node or second network node, or a signal sent by the UE to the indicated first network node or second network node.

[0010] Certain aspects relate to a user equipment (UE). In some examples, the UE includes: a component for selecting a power headroom (PH) value associated with: a default PH configuration of the UE, a signal output of a first network node for sending to a first serving cell of a first cell group, or the signal output of a second network node for sending to the first serving cell of the first cell group. In some examples, the UE includes a component for outputting a PH report including the selected PH value for sending to a second serving cell of a second cell group, wherein the PH report is output for sending via a first time slot. In some examples, the UE includes a component for outputting the signal for sending to the first network node or the second network node via at least one of the first time slot or a second time slot adjacent to the first time slot.

[0011] Certain aspects relate to a network node. In some examples, the network node includes means for outputting an indication of a first network node of a first serving cell or a second network node of the first serving cell for transmission to a user equipment (UE), the first serving cell being part of a first cell group, the device being part of a second serving cell of a second cell group. In some examples, the network node includes means for obtaining a power headroom (PH) report from the UE, the power headroom (PH) report including a PH value associated with: a default PH configuration of the UE, for communicating with the indicated first network node or second network node, or a signal sent by the UE to the indicated first network node or second network node.

[0012] Certain aspects relate to a non-transitory computer-readable medium comprising instructions that, when executed by an apparatus, cause the apparatus to perform operations. In some examples, the operations include: selecting a power headroom (PH) value associated with: a default PH configuration of the UE, a signal output of a first network node for sending to a first serving cell of a first cell group, or the signal output of a second network node for sending to the first serving cell of the first cell group. In some examples, the operations include: outputting a PH report including the selected PH value for sending to a second serving cell of a second cell group, wherein the PH report is output for sending via a first time slot. In some examples, the operations include: outputting the signal for sending to the first network node or the second network node via at least one of the first time slot or a second time slot adjacent to the first time slot.

[0013] Certain aspects relate to a non-transitory computer-readable medium comprising instructions that, when executed by an apparatus, cause the apparatus to perform operations. In some examples, the operations include: outputting an indication of a first network node of a first serving cell or a second network node of the first serving cell for transmission to a user equipment (UE), the first serving cell being part of a first cell group, and the apparatus being part of a second serving cell of a second cell group. In some examples, the operations include: obtaining a power headroom (PH) report from the UE, the power headroom (PH) report comprising a PH value associated with: a default PH configuration of the UE for communicating with the indicated first network node or second network node, or a signal sent by the UE to the indicated first network node or second network node.

[0014] To achieve the foregoing and related ends, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail some illustrative features of one or more aspects. However, these features are merely indicative of some of the various ways in which the principles of the various aspects may be employed, and this specification is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0016] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0017] Figure 2B is a diagram illustrating an example of DL channels within a subframe according to various aspects of the present disclosure.

[0018] Figure 2Cis a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0019] Figure 2D is a diagram illustrating an example of UL channels within a subframe according to various aspects of the present disclosure.

[0020] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0021] Figure 4 is a block diagram illustrating an example decomposed base station architecture.

[0022] Figure 5 is a block diagram of an example network including a first cell group (e.g., CG1) and a second cell group that communicates with a UE.

[0023] Figure 6 is a block diagram illustrating example communications of a dual connectivity UE and a cell group network and repeated uplink transmissions and transmission of power headroom (PH) reports.

[0024] Figure 7 This is an example of using Figure 6 Block diagram of example communications of the same dual connectivity UE and cell group network performing repeated uplink transmissions and transmission of PH reports.

[0025] Figure 8 This is an example of using Figure 6 Block diagram of example communications of the same dual connectivity UE and cell group network performing repeated uplink transmissions and transmission of PH reports.

[0026] Fig. 9 This is an example of using Figure 6 Block diagram of example communications of the same dual connectivity UE and cell group network performing repeated uplink transmissions and transmission of PH reports.

[0027] Fig.10 is a flow chart of a method of wireless communication.

[0028] Fig.11 is a diagram illustrating another example of a hardware implementation for another example apparatus.

[0029] Fig.12 is a flow chart of a method of wireless communication.

[0030] Fig.13 is a diagram illustrating an example of a hardware implementation for an apparatus. DETAILED DESCRIPTION

[0031] The specific embodiments described below in conjunction with the accompanying drawings are intended as descriptions of various configurations and are not intended to represent the only configurations in which the concepts described herein can be practiced. In order to provide a thorough understanding of the various concepts, the specific embodiments include specific details. However, it is apparent to those skilled in the art that these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0032] In certain aspects, a user equipment (UE) may be configured to send repeated uplink signaling to multiple transmit / receive points (mTRPs). For example, the UE may send an uplink signal to a first TRP via a first beam and send the same signal to a second TRP via a second beam. Repeated transmission of the same signal via multiple beams may be performed in a time division multiplexing (TDM) TDM manner.

[0033] A radio resource control (RRC) parameter twoPHRMode is configured in PHR-Config under medium access control (MAC) CellGroupConfig to indicate whether a power headroom (PH) for repeated transmissions should be reported as two PH values ​​(e.g., a first PH value is associated with a signal sent to a first TRP, and a second PH value is associated with a signal sent to a second TRP). Here, twoPHRMode may indicate whether the two PH values ​​should be reported in a single PH report.

[0034] For example, if the UE is configured for twoPHRMode, the UE may determine an actual or virtual PH value for each transmission to the mTRP. The virtual PH value may be a default PH value (e.g., configured at the UE by the network) indicating the maximum transmit power of the UE as configured by a cell group (e.g., a master cell group MCG), and an actual PH value (e.g., the difference between the maximum transmit power and the transmit power used to transmit the signal). In some examples, the actual PH value may indicate how much transmit power is available for the UE to use in addition to the power used by the current transmission. The PH value may be reported to the network via an enhanced MAC control element (MAC-CE) that includes fields for multiple PH values. The enhanced MAC-CE may also include one or more fields that indicate whether a particular PH value is a virtual PH value or an actual PH value.

[0035] Of course, whether the network configures the UE to enable twoPHRMode may depend on whether the UE is capable of reporting two or more PH values ​​in a single PH report. Therefore, the UE may indicate its capability via information element (IE) mTRP-PUSCH-twoPHR-Reporting-r17. The UE may use this IE to indicate that it supports calculating two PH values ​​associated with uplink transmissions to mTRP. For example, if the UE is capable, the UE may send a PH report including a first PH value and a second PH value, where the two values ​​correspond to uplink transmissions made to different TRPs associated with the same serving cell on the same component carrier.

[0036] However, in a dual connectivity scenario, it is possible that twoPHRMode is configured for one MAC entity but not for another MAC entity. In this case, the MAC entity that is not configured for twoPHRMode may not be able to parse the enhanced MAC-CE. Therefore, if the MAC-CE to which the PH report is sent cannot support twoPHRMode, the PH report may be in a traditional format (e.g., including only one PH value for the serving cell). That is, if the UE sends repeated transmissions of multiple TRP transmission signals to a first cell in a first cell group configured for twoPHRMode, but sends the sent PH report to a second cell group that is not configured for twoPHRMode, only one PH value sent at a time may be included in the PH report. Therefore, various aspects of the present disclosure relate to defining which PH values ​​associated with mTRP uplink transmissions should be included in the PH report.

[0037] In certain aspects, a first cell group may be configured with one or more service cells including a first service cell. The first cell group may be configured to receive and decode a PH report including multiple PH values ​​for the service cell. However, a second cell group including a second cell may not be configured to receive and decode a PH report including multiple PH values ​​for the service cell. Instead, the second cell group may be configured to receive a PH report including only one PH value per service cell. Thus, if the UE sends duplicate uplink transmissions to two TRPs (e.g., network nodes) of the first service cell, the UE may send a PH report to the second service cell including an indication of a PH value associated with one of the uplink transmissions, but may omit the PH value associated with the other uplink transmission from the PH report.

[0038] In a first example, if the UE sends only one uplink signal to the first TRP or the second TRP, but no other uplink transmissions are made thereafter, the UE may include the PH value associated with the uplink transmission to the first TRP or the second TRP in the PH report. Here, only one uplink transmission is made, so only one PH value is reported, and other PH values ​​are not omitted. Here, if the PH report is sent in the same timeslot used to send the uplink transmission, the PH value may be an actual PH value (e.g., the difference between the maximum transmit power that the UE can use for transmission to the first TRP and the transmit power that the UE uses for uplink transmission).

[0039] In a second example, the UE may report a PH value associated with the earliest uplink transmission in time. For example, if an uplink transmission to a first TRP of a first service cell occurs during a first time slot, and an uplink transmission to a second TRP of the first service cell occurs during a second time slot after the first time slot, the UE may include only the PH value associated with the uplink transmission to the first TRP in the PH report. Here, if the PH report is sent in the same time slot used to send the uplink transmission, the PH value may be an actual PH value (e.g., the difference between the maximum transmit power that the UE can use for transmission to the first TRP and the transmit power that the UE uses for uplink transmission).

[0040] In a third example, if the uplink transmission occurs in a time slot after the PH report is sent, the UE may report a virtual PH value. In such an example, the virtual PH value may correspond to a default PH configuration of the UE.

[0041] In a fourth example, the UE may send two uplink communications: a first TRP to a first serving cell and a second TRP to the first serving cell, wherein both uplink communications are sent in a first time slot. The UE may also send a PH report to the second serving cell in the first time slot. In such examples, the UE may generate a PH report that includes a PH value for the uplink transmission that arrives first in time, or a PH value for the uplink transmission corresponding to a specific TRP identified by the second serving cell. For example, the second serving cell may send a message (e.g., a radio resource control (RRC) message) to the UE, wherein the message identifies a specific TRP of the first serving cell. The UE may then include in the PH report the PH value associated with the uplink transmission to the specific TRP, while omitting the PH value associated with the uplink transmission to another TRP.

[0042] In a fifth example, the second serving cell may configure the UE to report only the actual PH value for a specific TRP in the PH report. In this example, the UE may be configured to send the actual PH value associated with the uplink transmission to a specific TRP, even if the uplink transmission occurs after the transmission of the PH report.

[0043] In a sixth example, the UE may send a PH report including a field configured to indicate a TRP to which the PH value is associated. For example, if the UE sends an uplink signal to a first TRP, and the first signal is defined by a first PH value, the PH report may include the first PH value and an indication identifying the first TRP and associated with the first PH value.

[0044] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0045] As an example, an element or any part of an element or any combination of elements may be implemented as a "processing system" including one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chips (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. One or more processors in a processing system may execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc.

[0046] Therefore, in one or more example embodiments, the described functions can be implemented with hardware, software or any combination thereof. If implemented with software, the functions can be stored or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media. Storage media can be any available media that can be accessed by a computer. By way of example and not limitation, such computer-readable media may include a random access memory (RAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), an optical disk storage device, a magnetic disk storage device, other magnetic storage devices, a combination of computer-readable media of the above type, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.

[0047] Figure 1 1 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a user equipment (UE) 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0048] The base station 102 configured for 4G Long Term Evolution (LTE) (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). The base station 102 configured for 5G New Radio (NR) (collectively referred to as Next Generation RAN (NG-RAN)) can interface with the core network 190 via a second backhaul link 184. Among other functions, the base station 102 can also perform one or more of the following functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations 102 may communicate with each other directly or indirectly (eg, via the EPC 160 or the core network 190) via the third backhaul link 134 (eg, an X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless.

[0049] Base station 102 can communicate wirelessly with UE 104. Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include a home evolved Node B (eNB) (HeNB), which can provide services to a restricted group called a closed subscriber group (CSG). The communication link 120 between base station 102 and UE 104 can include an uplink (UL) (also called a reverse link) transmission from UE 104 to base station 102 and / or a downlink (DL) (also called a forward link) transmission from base station 102 to UE 104. The communication link 120 can use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link can be through one or more carriers. For each carrier allocated in the carrier aggregation for up to a total of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 can use a spectrum with a bandwidth of up to Y megahertz (MHz) (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.). The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​compared to UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0050] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0051] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in, for example, a 5 gigahertz (GHz) unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether a channel is available prior to communication.

[0052] The small cell 102' may operate in licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may improve the coverage of the access network and / or increase the capacity of the access network.

[0053] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is typically referred to (interchangeably) as the "sub-6 GHz" band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is typically (interchangeably) referred to as the "millimeter wave" band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0054] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used in this article, the term "below 6 GHz" or the like can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if the term "millimeter wave" or the like is used in this article, it can broadly represent frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0055] The base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), may include and / or be referred to as an eNB, a gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180, may operate in the traditional sub-6 GHz spectrum, in millimeter wave frequencies, and / or near millimeter wave frequencies to communicate with the UE 104. When the gNB 180 operates in millimeter wave or near millimeter wave frequencies, the gNB 180 may be referred to as a millimeter wave base station. The millimeter wave base station 180 may utilize beamforming 182 with the UE 104 to compensate for path loss and short range. The base station 180 and the UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming.

[0056] Base station 180 may send beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182". UE 104 may also send beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or may be different. The transmit direction and receive direction of UE 104 may be the same or may be different.

[0057] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, an MBMS gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. Generally speaking, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are passed through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service configuration and delivery. BM-SC 170 may serve as an entry point for content provider MBMS delivery, may be used to authorize and initiate MBMS bearer services in a public land mobile network (PLMN), and may be used to schedule MBMS delivery. MBMS gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area of ​​a broadcast specific service, and may be responsible for session management (start / stop) and for collecting eMBMS related billing information.

[0058] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may communicate with a unified data management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. Typically, the AMF 192 provides quality of service (QoS) flows and session management. All user IP packets are delivered through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to an IP service 197. The IP service 197 may include the Internet, an intranet, an IMS, a packet switching (PS) streaming media service, and / or other IP services.

[0059] Base stations may include and / or be referred to as gNBs, Node Bs, eNBs, access points, base transceivers, radio base stations, radio transceivers, transceiver functions, basic service sets (BSSs), extended service sets (ESSs), transmit receive points (TRPs), or some other suitable terminology. Base stations 102 provide access points to EPC 160 or core network 190 for UEs 104. Examples of UEs 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional devices. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0060] Reference again Figure 1 , in certain aspects, the UE 104 may include a power headroom (PH) reporting module 198. In some examples, the PH reporting module 198 is configured to select a power headroom (PH) value associated with: a default PH configuration of the device, a signal output of a first network node for transmission to a first serving cell of a first cell group, or the signal output of a second network node for transmission to the first serving cell of the first cell group. The PH reporting module 198 may also be configured to output a PH report including the selected PH value for transmission to a second serving cell of a second cell group, wherein the PH report is output for transmission via a first time slot. The PH reporting module 198 may also be configured to output the signal for transmission to the first network node or the second network node via at least one of the first time slot or a second time slot adjacent to the first time slot.

[0061] In certain aspects, the BS 102 may include a PH reporting module 198. In such examples, the PH reporting module 198 may be configured to output an indication of a first network node of a first serving cell or a second network node of the first serving cell for transmission to a user equipment (UE), the first serving cell being part of a first cell group, the device being part of a second serving cell of a second cell group. The PH reporting module 198 may also be configured to obtain a power headroom (PH) report from the UE, the power headroom (PH) report including a PH value associated with a default PH configuration of the UE for communicating with the indicated first network node or second network node, or a signal sent by the UE to the indicated first network node or second network node.

[0062] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. Figure 2C 250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D FIG280 is a diagram illustrating an example of an UL channel within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD) (wherein for a particular set of subcarriers (carrier system bandwidth), a subframe within the subcarrier set is dedicated to either DL or UL), or may be time division duplex (TDD) (wherein for a particular set of subcarriers (carrier system bandwidth), a subframe within the subcarrier set is dedicated to both DL and UL). Figure 2A , Figure 2C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (most of which are DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with slot format 34 (most of which are UL). Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are DL and UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The slot format is configured for the UE via a received slot format indicator (SFI) (dynamically configured via DL control information (DCI) or semi-statically / statically configured via radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0063] Other wireless communication technologies may have different frame structures and / or different channels. For example, a 10 millisecond (ms) frame may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols. The symbol on the DL may be a cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbol (also known as a single carrier frequency division multiple access (SC-FDMA) symbol) (for power-constrained scenarios; limited to single-stream transmission). The number of time slots in a subframe is based on the time slot configuration and parameter set. For slot configuration 0, different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For slot configuration 1, different parameter sets 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Accordingly, for slot configuration 0 and parameter set μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration are functions of the parameter set. The subcarrier spacing can be equal to 2 μ *15 kilohertz (kHz), where μ is parameter set 0 to 4. Therefore, the subcarrier spacing for parameter set μ=0 is 15 kHz, and the subcarrier spacing for parameter set μ=4 is 240 kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIG. 2A to FIG. 2D An example is provided for slot configuration 0 with 14 symbols per slot and parameter set μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP can have a specific set of parameters.

[0064] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a number of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0065] like Figure 2A As illustrated, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) for channel estimation at the UE (indicated as R for a particular configuration). x, where 100x is the port number, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS). RS may also include beam measurement RS (BRS), beam refinement RS (BRRS) and phase tracking RS (PT-RS).

[0066] Figure 2B Examples of various DL channels within a subframe of a frame are illustrated. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs), each CCE including nine RE groups (REGs), each REG including four consecutive REs in an OFDM symbol. The PDCCH within a BWP may be referred to as a control resource set (CORESET). Additional BWPs may be located at higher and / or lower frequencies on the channel bandwidth. The primary synchronization signal (PSS) may be within symbol 2 of a specific subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identity. The secondary synchronization signal (SSS) may be within symbol 4 of a specific subframe of a frame. The SSS is used by the UE to determine the physical layer cell identification group number and radio frame timing. Based on the physical layer identification and the physical layer cell identification group number, the UE may determine the physical cell identifier (PCI). Based on the PCI, the UE may determine the position of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the system frame number (SFN) and the number of RBs in the system bandwidth. The physical downlink shared channel (PDSCH) carries user data, broadcast system information not sent over the PBCH (such as the system information block (SIB)), and paging messages.

[0067] like Figure 2C As illustrated, some of the REs carry DM-RS (indicated as R for a particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may send a DM-RS for a physical uplink control channel (PUCCH) and a DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first one or two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, the PUCCH DM-RS may be sent in different configurations. The UE may send a sounding reference signal (SRS). The SRS may be sent in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the teeth of the comb. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0068] Figure 2DExamples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) / negative acknowledgement (NACK) feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSRs), power headroom reports (PHRs), and / or UCI.

[0069] Figure 3 3 is a block diagram of a base station 310 in an access network communicating with a UE 350. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0070] The transmit (TX) processor 316 and receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transport channel, forward error correction (FEC) coding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-order phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols can then be divided into parallel streams. Subsequently, each stream can be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially pre-coded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes, as well as for spatial processing. Channel estimates may be derived based on reference signals and / or channel condition feedback sent by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0071] At the UE 350, each receiver 354RX receives a signal through its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier and the reference signal are recovered and demodulated by determining the signal constellation point most likely to be sent by the base station 310. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by the base station 310. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.

[0072] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0073] Similar to the functions described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0074] The TX processor 368 may use channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310 to select appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0075] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0076] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0077] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to combine Figure 1 The 198 came to execute all aspects.

[0078] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to combine Figure 1 The 198 came to execute all aspects.

[0079] Figure 4 4 is a block diagram illustrating an example disaggregated base station 400 architecture. The disaggregated base station 400 architecture may include one or more CUs 410 that may communicate directly with a core network 420 via a backhaul link, or indirectly with a core network 420 through one or more disaggregated base station units, such as a near real-time (RT) RIC 425 via an E2 link, or a non-RT RIC 415 associated with a service management and orchestration (SMO) framework 405, or both. The CU 410 may communicate with one or more DUs 430 via respective midhaul links, such as an F1 interface. The DU 430 may communicate with one or more RUs 440 via respective fronthaul links. The RU 440 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 440.

[0080] Each of the units (i.e., CU 410, DU 430, RU 440, and near-RT RIC 425, non-RT RIC 415, and SMO framework 405) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of these units or an associated processor or controller that provides instructions to the communication interface of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface configured to receive or send signals to one or more of the other units on a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, a transmitter, or a transceiver (such as a radio frequency (RF) transceiver) configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0081] In some aspects, CU 410 may host higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 410. CU 410 may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 410 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 410 may be implemented to communicate with DU 430 for network control and signaling.

[0082] DU 430 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 440. In some aspects, DU 430 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling or modulation and demodulation, etc.) based at least in part on a functional split such as those defined by the 3rd Generation Partnership Project (3GPP). In some aspects, DU 430 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 430 or with control functions hosted by CU 410.

[0083] The lower layer functionality may be implemented by one or more RUs 440. In some deployments, a RU 440 controlled by a DU 430 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on a functional split (such as a lower layer functional split). In such an architecture, the RU 440 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 440 may be controlled by the corresponding DU 430. In some scenarios, this configuration may enable the DU 430 and CU 410 to be implemented in a cloud-based RAN architecture such as a virtual RAN (vRAN) architecture.

[0084] The SMO framework 405 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 405 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 405 may be configured to interact with a cloud computing platform (such as an open cloud (O-cloud) 490) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 410, DU 430, RU 440, and near-RT RIC 425. In some specific implementations, the SMO framework 405 may communicate with hardware aspects of the 4G RAN such as an open eNB (O-eNB) 411 via the O1 interface. Additionally, in some specific implementations, the SMO framework 405 may communicate directly with one or more RUs 440 via the O1 interface. The SMO framework 405 may also include a non-RT RIC 415 configured to support the functionality of the SMO framework 405 .

[0085] The non-RT RIC 415 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 425. The non-RT RIC 415 may be coupled to or communicate with the near-RT RIC 425 (such as via an A1 interface). The near-RT RIC 425 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 410, one or more DUs 430, or both, and the O-eNB with the near-RT RIC 425.

[0086] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 425, the non-RT RIC 415 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 425 and may be received from a non-network data source or network function at the SMO framework 405 or the non-RT RIC 415. In some examples, the non-RT RIC 415 or the near-RT RIC 425 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 415 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 405 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0087] As long as the MAC entity (e.g., cell group) to which the PH report is sent is not configured with twoPHRMode for New Radio Dual Connectivity (NR-DC), E-UTRAN New Radio Dual Connectivity (EN-DC), or New Radio E-UTRA Dual Connectivity (NE-DC), a legacy PH report may be generated. This is because if a PH report carrying multiple PH values ​​for a single serving cell is sent, the MAC entity may not be able to correctly decode the PH report. Therefore, the UE is required to determine which PH value among the multiple PH values ​​to send to the MAC entity.

[0088] Example of a network for communicating pH values

[0089] Figure 5 1 is a block diagram of an example network 500 including a first cell group 502 (eg, CG1) and a second cell group 504 in communication with a UE 104. The first cell group 502 includes a first DU 530 (eg, CG2) configured as a MAC entity of the first cell group 502. Figure 4 The first cell group 502 may include one or more serving cells, but is illustrated as including a first serving cell 506 for simplicity. The first serving cell may be configured as a PCell, a PSCell, an SCell, etc. The first serving cell 506 includes a first RU 540 (e.g., Figure 4 4. The first RU 540 of the present invention may be a first DU 530 that communicates with the RU 440 of the present invention. Although a RU may include one or more TRPs, the first RU 540 is illustrated as having a first TRP 508 (TRP1) and a second TRP 510 (TRP2). The two TRPs may communicate with the UE 104 using the same component carrier (e.g., CC1).

[0090] The second cell group 504 may include one or more service cells, and is illustrated as including a second service cell 512 and a third service cell 513. Each of these service cells may be configured as a PCell, a PSCell, a SCell, etc. The second service cell 512 includes a second DU 532, a second RU 542, and a first TRP 514 (TRP1) and a second TRP 516 (TRP2) configured as a MAC entity of the second cell group 504. The second cell group 504 also includes a third service cell 513, which includes a second DU 532, a third RU 544, and a first TRP 518 (TRP1) and a second TRP 520 (TRP2).

[0091] The TRPs described herein may be integrated aspects of their respective RUs. For example, one or more TRPs may be a group of antenna elements in an antenna array of a RU, where the group includes equal to or less than all antenna elements. In some examples, a TRP may be implemented as a separate antenna array external to the RU. As used herein, a TRP may be referred to as a "network node."

[0092] In this example, the UE 104 is configured to communicate with both the first TRP 508 and the second TRP 510 of the first serving cell 506 via the first component carrier (CC1). That is, the UE 104 can send uplink communications (e.g., PUSCH, PUCCH, etc.) to the first serving cell 506 via two communication links. The UE 104 is also configured to communicate with the second serving cell 512. In this example, the UE 104 can communicate directly with the second RU 542 or directly with the first TRP 514. In some examples, the first DU 530 and the second DU 532 can be controlled by the same CU (e.g., Figure 4 CU 410) Management.

[0093] Here, the UE 104 may send a repeated signal to one or more of the first TRP 508 and the second TRP 510 in a PUSCH transmission (PUSCH1). In other words, the UE 104 may send a signal to one TRP and then send the same signal to another TRP via the same component carrier. The UE 104 may also send a PH report (PHR) to the second serving cell 512, reporting a PH value for one of the transmissions to the first TRP 508 or the transmissions to the second TRP 510.

[0094] Figure 6 is a block diagram illustrating an example communication 650 of a dual connectivity UE 104 and a cell group network 600 and repeated uplink transmissions and transmission of a PH report 622.

[0095] The first cell group 602 (CG1) (eg, Figure 5 The first cell group 502 of the present invention may include one or more serving cells, which are illustrated as SCell 606 and PSCell / PCell 608. The first cell group 602 may operate as a secondary cell group (SCG). The SCell 606 may include one or more TRPs, which are illustrated as a first TRP 612 (TRP1) and a second TRP 614 (TRP2). The second cell group 604 (CG2) (e.g., Figure 5 The second cell group 504 may include one or more serving cells, which are illustrated as PCell / SCell 610 and a third TRP 616 (TRP3). The second cell group 604 may operate as a master cell group (MCG).

[0096] In this example, the first cell group 602 is configured with twoPHRMode, which means that the UE 104 can calculate two PH values: one for uplink transmission to the first TRP 612 and one for uplink transmission to the second TRP 614, where the two TRPs are in the same serving cell and the two PH values ​​are reported in the same PH report. However, the second cell group 604 is not configured with twoPHRMode, which means that the second cell group 604 will not be able to receive and correctly decode the PH report including multiple (e.g., two) PH values ​​for each serving cell. Therefore, in this example, if the UE 104 is sending a PH report to the serving cell of the second cell group 604, the UE 104 can still send uplink communications to multiple TRPs of the first cell group 602, but the UE 104 can calculate and report only one PH value to the serving cell 610 of the second cell group 604. The following example provides techniques and methods by which the UE 104 can calculate and report its PH value for a multi-uplink transmission scenario in which the second cell group 604 is not configured with twoPHRMode.

[0097] Initially, the serving cell 610 in the second cell group may provide an uplink grant to the UE 104, thereby providing the UE 104 with resources in the first time slot (time slot 1) for sending a PH report 622. As illustrated, the UE 104 may send a repeated instance of an uplink signal (e.g., PUSCH1) to the first cell group 602. Specifically, the UE 104 may send a first uplink signal 618 to the first TRP 612 and a second uplink signal 620 to the second TRP 614. The first uplink signal 618 and the second uplink signal 620 may be multiple transmissions of the same signal. The UE may also send a PH report that includes a PH value associated with one of the first uplink signal 618 or the second uplink signal 620.

[0098] Uplink communication 650 illustrates a first example of repeated uplink transmissions by UE 104. As shown, UE 104 may transmit on the same component carrier (CC n ) and in the same time slot (time slot 1) to the first TRP 612 sends a first uplink signal 618 and sends a second uplink signal 620 to the second TRP 614. Here, relative to the second uplink signal 620, the first uplink signal 618 is sent first in time. The UE 104 can also use another component carrier (CC m ) sends a PH report 622 to the third serving cell 610 of the second cell group via the same time slot (time slot 1), and the PH report includes a PH value for one of the first uplink signal 618 or the second uplink signal 620.

[0099] In this first example, the UE 104 may report the actual PH value for the first uplink transmission 618 to the first TRP 612 in the PH report 622 because the first transmission is the earliest in time relative to the second uplink transmission 620. That is, in a scenario where two uplink transmissions are made during the same time slot, the UE 104 may be configured to send only the PH value associated with the earliest in time uplink transmission. Alternatively, the third serving cell 610 of the second cell group 604 may configure the UE 104 to send a PH value associated with a specific TRP (e.g., the first TRP 612 or the second TRP 614). For example, the third serving cell 610 may send an RRC message to the UE 104 identifying the specific TRP.

[0100] Figure 7 This is an example of using Figure 6 1 is a block diagram of an example communication 700 of the same dual connectivity UE 104 and cell group network 600 performing repeated uplink transmissions and transmission of PH reports 702.

[0101] Here, UE 104 transmits an uplink signal 704 to first serving cell 606 during a first time slot (time slot 1) (e.g., via first TRP 612 or second TRP 614). However, UE 104 does not make additional transmissions in the first time slot or in the next time slot (time slot 2). UE 104 also transmits a PH report 702 during the first time slot.

[0102] In this example, the UE 104 may be configured to include the actual PH value for the transmitted uplink signal 704 in the PH report 702. That is, in this scenario, the UE 104 may be configured to report the actual PH value for the uplink signal that is transmitted first in time. In other words, the UE 104 may report the actual PH value of the uplink signal 704 because the actual transmission of the uplink signal 704 occurs in the same time slot (time slot 1) in which the PH report 702 is transmitted.

[0103] Figure 8 This is an example of using Figure 6 800 is a block diagram of an example communication 800 of the same dual connectivity UE 104 and cell group network 600 performing repeated uplink transmissions and transmission of PH reports 802.

[0104] Here, UE 104 transmits a first uplink signal 804 to a first serving cell 606 during a first time slot and transmits a second uplink signal 806 to the first serving cell during a second time slot. The first uplink signal 804 may be transmitted to a first TRP 612 and the second uplink signal 806 may be transmitted to a second TRP 614. The two uplink signals may be transmitted via a common component carrier (CC n ) to send. UE 104 can also use another component carrier (CC m ) sends a PH report 802 to the third serving cell 610 during the first time slot.

[0105] In this example, the UE 104 may be configured to include the actual PH value for the transmitted first uplink signal 804 in the PH report 802. That is, in this scenario, the UE 104 may be configured to report the actual PH value for the uplink signal that is transmitted first in time (e.g., the first uplink signal 804, rather than the second uplink signal 806). In other words, the UE 104 may report the actual PH value of the first uplink signal 804 rather than the second uplink signal 806 because the actual transmission of the first uplink signal 804 occurs in the same time slot (time slot 1) in which the PH report 802 is transmitted.

[0106] Thus, in some examples, the PH report may include the actual PH value associated with the uplink signal sent in the same time slot as the PH report. Figure 7 and Figure 8 In the example of , UE 104 may report the actual PH value for the earliest (earliest in time) uplink signal associated with an SRS resource set (e.g., TRP) that overlaps in time (e.g., in the same time slot) with the PUSCH carrying the PH report.

[0107] Fig. 9 This is an example of using Figure 6 9 is a block diagram of an example communication 900 of the same dual connectivity UE 104 and cell group network 600 performing repeated uplink transmissions and transmission of PH reports 902.

[0108] Here, UE 104 transmits a first uplink signal 904 to a first serving cell 606 during a second time slot (time slot 2), and transmits a second uplink signal 906 to the first serving cell during a third time slot (time slot 3). The first uplink signal 904 may be transmitted to a first TRP 612, and the second uplink signal 906 may be transmitted to a second TRP 614. The two uplink signals may be transmitted via a common component carrier (CC n ) to send. UE 104 can also use another component carrier (CC m ) sends a PH report 902 to the third serving cell 610 during the first time slot (time slot 1).

[0109] In this example, the UE 104 may be configured to include a virtual PH value in the PH report 802. That is, because there is no uplink transmission in the first time slot, the UE 104 may be configured to report a virtual PH value for the first time slot because it does not yet know the actual PH value of either the first uplink signal 904 or the second uplink signal 906. The virtual PH value may be a default PH configuration associated with the first TRP 612 or the second TRP 614. In some examples, the reported virtual PH value is a value associated with the TRP to which the uplink signal will be sent first in time. In the illustrated example, the UE 104 may send a virtual PH value corresponding to the first TRP 612 in the PH report 902. Alternatively, the third serving cell 610 of the second cell group 604 may configure the UE 104 to send a virtual PH value associated with a specific TRP (e.g., the first TRP 612 or the second TRP 614). For example, the third serving cell 610 may send an RRC message to the UE 104 identifying a specific TRP.

[0110] exist Figures 6 to 9In any of the examples illustrated in , UE 104 may be configured by third serving cell 610 to send a PH report that includes an actual PH value corresponding to a specific TRP. That is, even if an uplink signal is not sent to a specific TRP until a time slot after PH report 902, UE 104 may be configured to determine an actual PH value associated with the uplink signal before the uplink signal is sent. Here, third serving cell 610 may configure a specific TRP for UE 104 via a radio resource control (RRC) message.

[0111] exist Figures 6 to 9 In any of the examples illustrated in , UE 104 may be configured by third serving cell 610 to send a PH report that includes only virtual PH values ​​associated with repeated signal uplink transmissions. For example, UE 104 may send a PH report to one or more TRPs (e.g., first TRP 612 and / or second TRP 614) in first serving cell 606, the PH report including one or more virtual values ​​associated with the transmissions. Here, third serving cell 610 may configure UE 104 with an indication of a specific TRP (for which a virtual PH value is to be provided) via a radio resource control (RRC) message (e.g., phr-ModeOtherCG).

[0112] In some examples, the PH report of any of Examples 6 to 9 may be sent using a MAC-CE format. In some examples, the MAC-CE format may include an additional field that enables UE 104 to identify a TRP associated with a specific actual or virtual PH value included in the MAC-CE.

[0113] Fig.10 1000 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104; device 1102). At 1002, the UE may optionally obtain a first indication that a first cell group is configured to process a PH report including a plurality of PH values ​​of a serving cell. For example, 1002 may be performed by a receiving component 1140. Here, the first cell group (e.g., Figure 6 The first cell group 602) may send an indication to the UE that it is configured for twoPHRMode.

[0114] At 1004, the UE may optionally obtain a second indication that the second cell group is not configured to process a PH report including multiple PH values ​​of the serving cell, wherein the selection of the PH value is based on the first indication and the second indication. For example, 1004 may be performed by the receiving component 1140. Here, the second cell group (e.g., Figure 6Based on the signaling received by the UE from the first cell group in 1002 and the second cell group in 1004, the UE may determine a plurality of TRPs (e.g., Figure 6 Only one PH value is selected from the multiple PH values ​​associated with the repeated uplink transmission of TRP1 612 and TRP2 614).

[0115] At 1006, the UE may optionally obtain an indication of the first network node from the second serving cell. For example, 1006 may be performed by receiving component 1140. Here, the UE may obtain an indication of the first network node from the second serving cell (e.g., Figure 6 The third serving cell 610) receives signaling, wherein the signaling identifies the first serving cell (eg, Figure 6 The signaling may include a specific TRP (e.g., TRP1 612 or TRP2 614) of the first serving cell 606 of the UE. Because the UE only needs to select one PH value associated with one of these TRPs, the signaling may instruct the UE to include the PH value associated with the identified TRP. In this way, when the UE sends a PH report including the PH value to the second cell group, the second cell group knows which TRP the PH value corresponds to.

[0116] At 1008, the UE may select a power headroom (PH) value associated with: a default PH configuration of the device, a signal output of a first network node for sending to a first serving cell of a first cell group, or the signal output of a second network node for sending to the first serving cell of the first cell group. For example, 1008 may be performed by a selection component 1142. Here, the UE may select a PH value associated with TRP1, TRP2, or a virtual PH value. In some examples, the selected value may be based on the indication received at 1006. In some examples, the UE may be preconfigured to select a PH value based on a scenario (e.g., Figures 6 to 9 ) to select a specific one of these pH values.

[0117] At 1010, the UE may optionally generate a PH report including the selected PH value, wherein the PH value of the PH report is an actual PH value associated with the signal output for transmission to the first network node. For example, 1010 may be performed by a generation component 1144. Here, the UE may generate a PH report and include in the report an actual PH value associated with one of the uplink transmissions to the TRP.

[0118] At 1012, the UE may output a PH report including the selected PH value for transmission to a second serving cell of the second cell group, wherein the PH report is output for transmission via the first time slot. For example, 1012 may be performed by the transmission component 1146. Here, the UE may send Figure 6 The second serving cell (eg, the third serving cell 610) sends a PH report.

[0119] At 1014, the UE may output a signal via at least one of the first time slot or a second time slot adjacent to the first time slot for transmission to the first network node or the second network node. For example, 1014 may be performed by a transmission component 1146. Here, the UE may send an uplink signal to one of a plurality of TRPs of the first serving cell.

[0120] At 1016, the UE may output a second signal via the second time slot for transmission to the first network node, wherein the PH value of the PH report is an actual PH value associated with the first signal. For example, 1014 may be performed by a transmission component 1146. Here, the UE may send another uplink signal to another TRP in the TRP of the first serving cell.

[0121] At 1018, the UE may optionally output a second signal via the first time slot for transmission to a second network node of the second cell group, wherein the PH report includes an actual PH value associated with the first signal. For example, 1014 may be performed by the transmission component 1146. Here, the UE may send a PH report (e.g., Figure 6 PH Report 622).

[0122] In some aspects, the first time slot is located temporally after the second time slot.

[0123] In certain aspects, the PH report is output for transmission to the second serving cell via a Medium Access Control - Control Element (MAC-CE).

[0124] In certain aspects, the signal is output for transmission via a first time slot, and wherein the PH value of the PH report is an actual PH value associated with the signal.

[0125] In certain aspects, the signal is output for transmission via a second time slot, and wherein the PH value of the PH report is a virtual PH value associated with a default PH configuration.

[0126] In certain aspects, the PH value associated with the first signal is selected based on: (i) the first signal being output earliest in time for transmission relative to the second signal, or (ii) an indication of the first network node obtained from the first network node.

[0127] In certain aspects, the indication is obtained via a radio resource control (RRC) message.

[0128] In certain aspects, the PH report includes a field identifying the first network node or the second network node to which the PH value corresponds.

[0129] In certain aspects, the PH report omits all PH values ​​associated with the first serving cell except the selected PH value.

[0130] Fig.11 1 is a diagram 1100 illustrating an example of a hardware implementation for an apparatus 1102. The apparatus 1102 is a UE and includes a cellular baseband processor 1104 (also referred to as a modem) coupled to a cellular RF transceiver 1122 and one or more subscriber identity modules (SIM) cards 1120, an application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110, a Bluetooth module 1112, a wireless local area network (WLAN) module 1114, a global positioning system (GPS) module 1116, and a power source 1118. The cellular baseband processor 1104 communicates with the UE 104 and / or the BS 102 / 180 via the cellular RF transceiver 1122. The cellular baseband processor 1104 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transitory. The cellular baseband processor 1104 is responsible for general processing, including executing software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor 1104, causes the cellular baseband processor 1104 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1104 when executing the software. The cellular baseband processor 1104 also includes a receiving component 1130, a communication manager 1132, and a sending component 1134. The communication manager 1132 includes one or more of the illustrated components. The components within the communication manager 1132 may be stored in a computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1104. The cellular baseband processor 1104 may be a component of the UE 350 and may include a memory 360 and / or at least one of a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the device 1102 may be a modem chip and include only the baseband processor 1104, and in another configuration, the device 1102 may be the entire UE (e.g., see Figure 3 350), and includes the aforementioned additional modules of device 1102.

[0131] The communication manager 1132 includes a receiving component 1140 configured to obtain a first indication that the first cell group is configured to process a PH report including a plurality of PH values ​​of a serving cell; obtain a second indication that the second cell group is not configured to process a PH report including a plurality of PH values ​​of a serving cell, wherein the selection of the PH value is based on the first indication and the second indication; obtain an indication to the first network node from the second serving cell; for example, as in combination with Fig.10 As described in 1002, 1004 and 1006.

[0132] The communications manager 1132 also includes a selection component 1142 configured to select a power headroom (PH) value associated with: a default PH configuration of the apparatus, a signal output of a first network node for transmission to a first serving cell of a first cell group, or a signal output of a second network node for transmission to a first serving cell of a first cell group; for example, as combined with Fig.10 As described in 1008.

[0133] The communication manager 1132 also includes a generation component 1144 configured to generate a PH report including the selected PH value, wherein the PH value of the PH report is an actual PH value associated with the signal output for transmission to the first network node; for example, as combined with Fig.10 As described in 1010.

[0134] The communication manager 1132 also includes a sending component 1146, which is configured to output a PH report including the selected PH value for sending to a second serving cell of the second cell group, wherein the PH report is output via a first time slot for sending; a signal is output via at least one of the first time slot or a second time slot adjacent to the first time slot for sending to the first network node or the second network node; a second signal is output via the second time slot for sending to the first network node, wherein the PH value of the PH report is an actual PH value associated with the first signal; and the second signal is output via the first time slot for sending to the second network node of the second cell group, wherein the PH report includes the actual PH value associated with the first signal; for example, as combined Fig.10 As described in 1012, 1014, 1016 and 1018.

[0135] The device may include executing Fig.10The additional components of each box in the box of the algorithm in the aforementioned flowchart. Therefore, each box in the above flowchart can be performed by a component, and the device may include one or more of these components. These components can be one or more hardware components, which are specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0136] In one configuration, the apparatus 1102 (and specifically the cellular baseband processor 1104) includes: means for obtaining a first indication that a first cell group is configured to process a PH report including a plurality of PH values ​​for a serving cell; means for obtaining a second indication that a second cell group is not configured to process a PH report including a plurality of PH values ​​for a serving cell, wherein selection of the PH value is based on the first indication and the second indication; means for obtaining an indication of a first network node from the second serving cell; means for selecting a power headroom (PH) value associated with: a default PH configuration of the apparatus, a signal output of a first network node for transmission to a first serving cell of the first cell group, or a signal output of a second network node for transmission to a first serving cell of the first cell group; means for generating a PH value including the selected PH value a component for outputting a PH report including the selected PH value for sending to a second serving cell of a second cell group, wherein the PH report is output for sending via a first time slot; a component for outputting a signal for sending to the first network node or the second network node via at least one of the first time slot or a second time slot adjacent to the first time slot; a component for outputting a second signal for sending to the first network node via the second time slot, wherein the PH value of the PH report is an actual PH value associated with the first signal; and a component for outputting a second signal for sending to a second network node of the second cell group via the first time slot, wherein the PH report includes the actual PH value associated with the first signal.

[0137] The means for receiving or the means for obtaining may include Figure 3 350 of the UE 350 illustrated in FIG. 350. The means for transmitting or the means for outputting may include Figure 3 350 (such as the transmit processor 368) or the antenna 352 of the UE 350 illustrated in FIG. The means for selecting and the means for generating may include a processing system that may include one or more processors (such as the controller / processor 359), a memory 360 and / or Figure 3 Any other suitable hardware components of the UE 350 shown in FIG.

[0138] In some cases, a device may have an interface (a component for outputting) for outputting a frame for transmission, rather than actually transmitting the frame. For example, a processor may output a frame to a radio frequency (RF) front end via a bus interface for transmission. Similarly, a device may have an interface (a component for obtaining) for obtaining a frame received from another device, rather than actually receiving the frame. For example, a processor may obtain (or receive) a frame from an RF front end for reception via a bus interface.

[0139] The aforementioned means may be one or more of the aforementioned components of the apparatus 1102 configured to perform the functions recited by the aforementioned means. As described above, the apparatus 1102 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Therefore, in one configuration, the aforementioned means may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions recited by the aforementioned means.

[0140] Fig.12 1200 is a flow chart of a method of wireless communication. The method may be performed by a network node or a base station (e.g., base station 102 / 180; device 1302). At 1202, the network node may output an indication of a first network node of a first serving cell or a second network node of a first serving cell for transmission to a user equipment (UE), the first serving cell being part of a first cell group, the device being part of a second serving cell of a second cell group. For example, 1202 may be performed by a sending component 1340.

[0141] At 1204, the network node may obtain a power headroom (PH) report from the UE, the power headroom (PH) report including a PH value associated with: a default PH configuration of the UE for communicating with the indicated first network node or the second network node, or a signal sent by the UE to the indicated first network node or the second network node. For example, 1204 may be performed by the sending component 1342.

[0142] Fig.131300 is an example of a hardware implementation for an apparatus 1302. The apparatus 1302 is a BS and includes a baseband unit 1304. The baseband unit 1304 can communicate with the UE 104 via a cellular RF transceiver. The baseband unit 1304 may include a computer-readable medium / memory. The baseband unit 1304 is responsible for general processing, including executing software stored on the computer-readable medium / memory. The software, when executed by the baseband unit 1304, causes the baseband unit 1304 to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the baseband unit 1304 when executing the software. The baseband unit 1304 also includes a receiving component 1330, a communication manager 1332, and a sending component 1334. The communication manager 1332 includes one or more of the illustrated components. The components within the communication manager 1332 may be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 1304. The baseband unit 1304 may be a component of the BS 310 and may include a memory 376 and / or at least one of the TX processor 316 , the RX processor 370 , and the controller / processor 375 .

[0143] The communication manager 1332 includes a sending component 1340, which is configured to output an indication of a first network node of a first service node or a second network node of a first service cell for transmission to a user equipment (UE), wherein the first service cell is part of a first cell group and the device is part of a second service cell of a second cell group; for example, as described in combination with 1202.

[0144] The communication manager 1332 also includes a receiving component 1342, which is configured to obtain a power headroom (PH) report from the UE, the power headroom (PH) report including a PH value associated with the following items: a default PH configuration of the UE, used for communicating with the indicated first network node or the second network node, or a signal sent by the UE to the indicated first network node or the second network node; for example, as described in combination with 1204.

[0145] The device may include executing Fig.12 The additional components of each box in the box of the algorithm in the aforementioned flowchart. Therefore, each box in the above flowchart can be performed by a component, and the device may include one or more of these components. These components can be one or more hardware components, which are specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0146] In one configuration, the apparatus 1302 (and specifically the baseband unit 1304) includes a component for outputting an indication of a first network node of a first serving node or a second network node of a first serving cell for transmission to a user equipment (UE), wherein the first serving cell is part of a first cell group and the apparatus is part of a second serving cell of a second cell group; and a component for obtaining a power headroom (PH) report from the UE, the power headroom (PH) report including a PH value associated with: a default PH configuration of the UE for communicating with the indicated first network node or the second network node, or a signal sent by the UE to the indicated first network node or the second network node.

[0147] The means for receiving or the means for obtaining may include Figure 3 The receiver (such as the receiving processor 370) and / or the antenna 320 of the network node 310 illustrated in FIG. The means for transmitting or the means for outputting may include Figure 3 A transmitter (such as a transmit processor 316) or an antenna 320 of the network node 310 illustrated in FIG.

[0148] In some cases, a device may have an interface (a component for outputting) for outputting a frame for transmission, rather than actually transmitting the frame. For example, a processor may output a frame to a radio frequency (RF) front end via a bus interface for transmission. Similarly, a device may have an interface (a component for obtaining) for obtaining a frame received from another device, rather than actually receiving the frame. For example, a processor may obtain (or receive) a frame from an RF front end for reception via a bus interface.

[0149] The aforementioned means may be one or more of the aforementioned components of the apparatus 1302 configured to perform the functions recited by the aforementioned means. As described above, the apparatus 1302 may include the TX processor 316, the RX processor 370, and the controller / processor 375. Therefore, in one configuration, the aforementioned means may be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions recited by the aforementioned means.

[0150] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is merely an illustration of the exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged based on design preferences. Further, some blocks can be combined or omitted. The attached method claims provide the elements of each block in a sample order, but are not meant to be limited to the specific order or hierarchy provided.

[0151] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but to conform to the full scope consistent with the language claims, wherein the elements mentioned in the singular are not intended to represent "one and only one", unless specifically so stated, but "one or more". Terms such as "if", "when ..." and "while ..." should be interpreted as "under the conditions of ...", rather than meaning an immediate time relationship or reaction. That is, these phrases, such as "when ...", do not mean an immediate action in response to the occurrence of an action or during the occurrence of an action, but simply imply that if the conditions are met, then the action will occur, but no specific or immediate time limit is required for the occurrence of the action. The word "exemplary" is used herein to mean "used as an example, instance or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or having advantages over other aspects. Unless otherwise specified, the term "some" refers to one or more. Combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may include one or more members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout the disclosure that are known or later become known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Furthermore, no matter whether such disclosure is explicitly recited in the claims, anything disclosed herein is not intended to be disclosed to the public. Words such as "module", "mechanism", "element", "device", etc. cannot replace the word "component". Therefore, no claim element will be understood as a functional component unless the element is explicitly recited using the phrase "component for..."

[0152] Embodiments

[0153] The following examples are merely illustrative and may be combined with aspects of other embodiments or teachings described herein, but are not limited thereto.

[0154] Embodiment 1 is a method for performing wireless communications at a user equipment (UE), the method comprising: selecting a power headroom (PH) value associated with: a default PH configuration of the UE, for signal output to a first network node of a first serving cell of a first cell group, or for signal output to a second network node of the first serving cell of the first cell group; outputting a PH report including the selected PH value for sending to a second serving cell of a second cell group, wherein the PH report is output for sending via a first time slot; and outputting the signal for sending to the first network node or the second network node via at least one of the first time slot or a second time slot adjacent to the first time slot.

[0155] Embodiment 2 is a method according to embodiment 1, wherein the first time slot is located after the second time slot in time.

[0156] Embodiment 3 is a method according to any one of embodiments 1 and 2, wherein the PH report is output to be sent to the second serving cell via a medium access control-control element (MAC-CE).

[0157] Embodiment 4 is a method according to any one of Embodiments 1 to 3, the method further comprising: obtaining a first indication that the first cell group is configured to process a PH report including multiple PH values ​​of the service cell; and obtaining a second indication that the second cell group is not configured to process a PH report including multiple PH values ​​of the service cell, wherein the selection of the PH value is based on the first indication and the second indication.

[0158] Embodiment 5 is a method according to any one of embodiments 1 to 4, wherein the signal is output for transmission via the first time slot, and wherein the PH value of the PH report is an actual PH value associated with the signal.

[0159] Embodiment 6 is a method according to any one of embodiments 1 to 5, wherein the signal is a first signal, wherein the first signal is output via the first time slot for sending to the first network node, and wherein the method further includes: outputting a second signal via the second time slot for sending to the first network node, wherein the PH value of the PH report is an actual PH value associated with the first signal.

[0160] Embodiment 7 is a method according to any one of embodiments 1 to 6, wherein the signal is output for transmission via the second time slot, and wherein the PH value of the PH report is a virtual PH value associated with the default PH configuration.

[0161] Embodiment 8 is a method according to any one of embodiments 1 to 7, wherein the signal is a first signal, wherein the first signal is output via the first time slot for sending to the first network node, and wherein the method further includes: outputting a second signal via the first time slot for sending to the second network node of the second cell group, wherein the PH report includes an actual PH value associated with the first signal.

[0162] Embodiment 9 is a method according to embodiment 8, wherein the PH value associated with the first signal is selected based on: (i) the first signal being output for transmission first in time relative to the second signal, or (ii) an indication of the first network node obtained from the first network node.

[0163] Embodiment 10 is a method according to any one of embodiments 1 to 9, wherein the method further includes: obtaining an indication of the first network node from the second serving cell; and generating the PH report including the selected PH value, wherein the PH value of the PH report is an actual PH value associated with the signal output for sending to the first network node.

[0164] Embodiment 11 is a method according to embodiment 10, wherein the indication is obtained via a radio resource control (RRC) message.

[0165] Embodiment 12 is a method according to any one of embodiments 1 to 11, wherein the PH report includes a field identifying the first network node or the second network node to which the PH value corresponds.

[0166] Embodiment 13 is a method according to any one of embodiments 1 to 12, wherein the PH report omits all PH values ​​associated with the first serving cell except the selected PH value.

[0167] Embodiment 14 is a method for performing wireless communications at a network node, the method comprising: outputting an indication of a first network node of a first service node or a second network node of the first service cell for sending to a user equipment (UE), the first service cell being part of a first cell group, and the device being part of a second service cell of a second cell group; and obtaining a power headroom (PH) report from the UE, the power headroom (PH) report comprising PH values ​​associated with: a default PH configuration of the UE, for communicating with the indicated first network node or second network node, or a signal sent by the UE to the indicated first network node or second network node.

[0168] Embodiment 15 is a method according to embodiment 14, wherein the PH value is a unique PH value associated with the first serving cell.

[0169] Embodiment 16 is a method according to any one of embodiments 14 and 15, wherein the indication is output to be sent via a radio resource control (RRC) message.

[0170] Embodiment 17 is a method according to any one of embodiments 14 to 16, wherein the second cell group is not configured to process a PH report including multiple PH values ​​of a serving cell.

[0171] Embodiment 18 is a method according to any one of embodiments 14 to 17, wherein the power headroom (PH) report is obtained via a medium access control-control element (MAC-CE), and wherein the MAC-CE includes a field configured to identify the first network node or the second network node to which the PH value is associated.

[0172] Embodiment 19 is a UE, comprising: a transceiver; a memory, the memory comprising instructions; and one or more processors, the one or more processors being configured to execute the instructions so that the UE performs a method according to any one of embodiments 1 to 13, wherein the transceiver is configured to: send the PH report; and send the signal.

[0173] Embodiment 20 is a network node, comprising: a transceiver; a memory, the memory comprising instructions; and one or more processors, the one or more processors being configured to execute the instructions and causing the network node to perform a method according to any one of embodiments 14 to 18, wherein the transceiver is configured to: send the indication; and receive the PH report.

[0174] Embodiment 21 is a device for wireless communication, the device comprising: a component for executing the method according to any one of embodiments 1 to 13.

[0175] Embodiment 22 is a device for wireless communication, the device comprising: a component for executing the method according to any one of embodiments 14 to 18.

[0176] Embodiment 23 is a non-transitory computer-readable medium, which includes instructions, which when executed by a device cause the device to perform the method according to any one of embodiments 1 to 13.

[0177] Embodiment 24 is a non-transitory computer-readable medium, which includes instructions, which when executed by a device cause the device to perform the method according to any one of embodiments 14 to 18.

[0178] Embodiment 25 is a device for wireless communication, the device comprising: a memory, the memory comprising instructions; and one or more processors, the one or more processors being configured to execute the instructions so that the device performs a method according to any one of Embodiments 1 to 13.

[0179] Embodiment 26 is a device for wireless communication, the device comprising: a memory, the memory comprising instructions; and one or more processors, the one or more processors being configured to execute the instructions so that the device performs a method according to any one of Embodiments 14 to 18.

Claims

1. A device for wireless communication, the device comprising: a memory including instructions; and one or more processors configured to execute the instructions and cause the apparatus to: Select the Power Headroom (PH) value associated with: The default PH configuration of the device, a signal output for sending to a first network node of a first serving cell of a first cell group, or the signal output for sending to a second network node of the first serving cell of a first group of cells; outputting a PH report including the selected PH value for transmission to a second serving cell of a second cell group, wherein the PH report is outputted for transmission via a first time slot; and The signal is output via at least one of the first time slot or a second time slot adjacent to the first time slot for transmission to the first network node or the second network node.

2. The apparatus of claim 1, wherein the first time slot is located after the second time slot in time. 3 . The apparatus of claim 1 , wherein the PH report is output to be sent to the second serving cell via a Medium Access Control-Control Element (MAC-CE).

4. The apparatus of claim 1 , wherein the one or more processors are further configured to: obtaining a first indication that the first cell group is configured to process a PH report including a plurality of PH values ​​of the serving cell; and A second indication is obtained that the second cell group is not configured to process a PH report including a plurality of PH values ​​for a serving cell, wherein the selection of the PH value is based on the first indication and the second indication.

5. The apparatus of claim 1, wherein the signal is output for transmission via the first time slot, and wherein the PH value of the PH report is an actual PH value associated with the signal.

6. The apparatus of claim 1 , wherein the signal is a first signal, wherein the first signal is output via the first time slot for transmission to the first network node, and wherein the one or more processors are further configured to: A second signal is output via the second time slot for transmission to the first network node, wherein the PH value of the PH report is an actual PH value associated with the first signal.

7. The apparatus of claim 1, wherein the signal is output for transmission via the second time slot, and wherein the PH value of the PH report is a virtual PH value associated with the default PH configuration.

8. The apparatus of claim 1, wherein the signal is a first signal, wherein the first signal is output via the first time slot for transmission to the first network node, and wherein the one or more processors are further configured to: Outputting a second signal via the first time slot for transmission to the second network node of the second cell group, wherein the PH report comprises an actual PH value associated with the first signal.

9. The apparatus of claim 8, wherein the PH value associated with the first signal is selected based on: (i) the first signal being output for transmission earliest in time relative to the second signal, or (ii) an indication of the first network node obtained from the first network node.

10. The apparatus of claim 1, wherein the one or more processors are further configured to: obtaining an indication of the first network node from the second serving cell; and The PH report is generated including the selected PH value, wherein the PH value of the PH report is an actual PH value associated with the signal output for transmission to the first network node.

11. The apparatus of claim 10, wherein the indication is obtained via a radio resource control (RRC) message.

12. The apparatus of claim 1, wherein the PH report comprises a field identifying the first network node or the second network node to which the PH value corresponds.

13. The apparatus of claim 1, wherein the PH report omits all PH values ​​associated with the first serving cell except the selected PH value.

14. A user equipment (UE), the user equipment (UE) comprising: Transceiver; a memory including instructions; and one or more processors configured to execute the instructions and cause the UE to: Select the Power Headroom (PH) value associated with: The default PH configuration of the device, a signal sent to a first network node of a first serving cell of a first cell group, or the signal sent to a second network node of the first serving cell of a first cell group; sending, via the transceiver, a PH report including the selected PH value to a second serving cell of the second cell group, wherein the PH report is sent via a first time slot; as well as The signal is sent to the first network node or the second network node via the transceiver, via at least one of the first time slot or a second time slot adjacent to the first time slot.

15. An apparatus for wireless communication, the apparatus comprising: a memory including instructions; and one or more processors configured to execute the instructions and cause the apparatus to: outputting, for transmission to a user equipment (UE), an indication of a first network node of a first serving node or a second network node of the first serving cell, the first serving cell being part of a first cell group and the device being part of a second serving cell of a second cell group; as well as Obtaining a power headroom (PH) report from the UE, the power headroom (PH) report comprising PH values ​​associated with: a default PH configuration of the UE, for communicating with the indicated first network node or second network node, or A signal sent by the UE to the indicated first network node or second network node.

16. The apparatus of claim 15, wherein the PH value is a unique PH value associated with the first serving cell.

17. The apparatus of claim 15, wherein the indication is output for transmission via a radio resource control (RRC) message.

18. The apparatus of claim 15, wherein the second cell group is not configured to process a PH report including a plurality of PH values ​​of a serving cell.

19. The apparatus of claim 15, wherein the power headroom (PH) report is obtained via a medium access control-control element (MAC-CE), and wherein the MAC-CE includes a field configured to identify the first network node or the second network node to which the PH value is associated.

20. The apparatus according to claim 15, further comprising: A transceiver, the transceiver being configured to: sending said indication to the first network node; and The PH report is received, wherein the apparatus is configured as a network node.

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