Method and apparatus for wireless communication

Abstract

The User Equipment (UE) transmits UE capability information to the base station corresponding to the maximum number of configured path loss reference signals and / or the maximum number of activated path loss reference signals. Subsequently, the base station configures a number of configured path loss reference signals for the UE that is less than or equal to the maximum number of configured path loss reference signals, and / or activates a number of path loss reference signals that is less than or equal to the maximum number of activated path loss reference signals based on the UE capability information.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATION(S)

[0002] This application claims the benefit of U.S. Provisional Application No. 62 / 938,131, filed on November 20, 2019, entitled “UE Capability Reporting for Configured and Activated Pathloss Reference Signals,” and U.S. Patent Application No. 17 / 096,844, filed on November 12, 2020, entitled “UE Capability Reporting for Configured and Activated Pathloss Reference Signals,” both of which are expressly incorporated herein by reference in their entirety. background Technical Field

[0004] The present disclosure relates generally to communication systems and, more particularly, to wireless communications including path loss reference signals.

[0005] introduction

[0006] Wireless communication systems are widely deployed to provide various 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.

[0007] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is a part of the continuous 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. 5GNR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR can be based on 4G Long Term Evolution (LTE) standards. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0008] Overview

[0009] A brief summary of one or more aspects is given below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define 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 that will be presented later.

[0010] A set of path loss reference signals may be configured for a user equipment (UE). Subsequently, a path loss reference signal from the configured set of path loss reference signals may be activated for the UE for use in performing power control. The UE may perform layer 3 (L3) filtering on the activated path loss reference signals one by one to determine a more stable path loss value for uplink power control. Aspects of the present disclosure improve configuration and activation of path loss reference signals through the ability of the UE to report its maximum number of configured path loss reference signals and / or the maximum number of activated path loss reference signals.

[0011] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication at a UE are provided. The apparatus transmits UE capability information corresponding to at least one of a configured first maximum number of path loss reference signals or an activated second maximum number of path loss reference signals to a base station. Subsequently, the UE receives a configuration of at least one of the configured path loss reference signals or the activated path loss reference signals from the base station based on the UE capability information.

[0012] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication at a base station are provided. The apparatus receives UE capability information about at least one of a first maximum number of configured path loss reference signals or a second maximum number of activated path loss reference signals from a UE. Subsequently, the base station configures the UE about at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals based on the UE capability information.

[0013] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are merely indicative of several of the various ways in which the principles of the various aspects may be employed, and this description is intended to cover 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 2C is 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 An example communication flow between a UE and a base station including UE capability signaling regarding a path loss reference signal is illustrated.

[0022] Figure 5 is a flow chart of a wireless communication method.

[0023] Figure 6 is a conceptual data flow diagram illustrating the flow of data between different devices / components in an example apparatus.

[0024] Figure 7 is a diagram illustrating an example of a hardware implementation for an example device.

[0025] Figure 8 is a flow chart of a wireless communication method.

[0026] Fig. 9 is a conceptual data flow diagram illustrating the flow of data between different devices / components in an example apparatus.

[0027] Fig.10 is a diagram illustrating an example of a hardware implementation for an example device.

[0028] Detailed Description

[0029] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid diluting such concepts.

[0030] A set of path loss reference signals may be configured for a user equipment (UE). Subsequently, a path loss reference signal from the configured set of path loss reference signals may be activated for the UE for performing power control. The UE may perform layer 3 (L3) filtering on the activated path loss reference signals one by one to determine a more stable path loss value for uplink power control. Aspects of the present disclosure improve configuration and activation of path loss reference signals through the UE's ability to report its maximum number of configured path loss reference signals and / or the maximum number of activated path loss reference signals.

[0031] 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 such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0032] 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 chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system may execute software. 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, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0033] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, these functions may 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 may be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of computer-readable media of the above types, or any other medium that may be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0034] 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 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.

[0035] The base station 102 configured for 4G LTE (collectively referred to as the 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 NR (collectively referred to as the 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 alert messages. The base stations 102 may communicate with each other directly or indirectly (eg, through the EPC 160 or the core network 190) over a 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.

[0036] Base stations 102 may communicate wirelessly with UEs 104. Each base station 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between a base station 102 and a UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links may be over one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth. These 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 to 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).

[0037] 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.

[0038] The wireless communication system may further include a Wi-Fi access point (AP) 150 in communication with a Wi-Fi station (STA) 152 via a communication link 154, e.g., in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0039] The small cell 102' may operate in a 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 boost the coverage of the access network and / or increase the capacity of the access network.

[0040] The electromagnetic spectrum is typically subdivided into various classes, 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 (interchangeably) referred to as the “sub-6 GHz band” in various documents and articles. Similar naming issues sometimes arise regarding FR2, which is typically (interchangeably) referred to as the “millimeter wave” band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0041] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used in this document, the term sub-"6GHz" and the like can broadly refer to frequencies that can be less than 6GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if used in this document, the term "millimeter wave" and the like can broadly refer to frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0042] Whether a small cell 102' or a large cell (e.g., a macro base station), the base station 102 may include and / or be referred to as an eNB, a gB node (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 UE 104. When gNB 180 operates in millimeter wave frequencies or near millimeter wave frequencies, gNB 180 may be referred to as a millimeter wave base station. Millimeter wave base station 180 may utilize beamforming 182 with UE 104 to compensate for path loss and short range. Base station 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming.

[0043] Base station 180 may transmit 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 transmit 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.

[0044] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may be in communication 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. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered 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 functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS-related charging information.

[0045] 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 be in communication 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. In general, the AMF 192 provides QoS flow and session management. All user Internet Protocol (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 IP multimedia subsystem (IMS), a packet switching (PS) streaming (PSS) service, and / or other IP services.

[0046] A base station may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmission reception point (TRP), or some other suitable term. The base station 102 provides an access point to the EPC 160 or the core network 190 for the UE 104. Examples of UE 104 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a health care device, an implant, a sensor / actuator, a display, or any other similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, ovens, 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.

[0047] Reference again Figure 1 In certain aspects, the UE 104 may include a path loss reference signal capability component 198 configured to transmit UE capability information corresponding to a maximum number of configured path loss reference signals and / or a maximum number of activated path loss reference signals to the base station 102 / 180. The base station 102 / 180 may include a path loss reference signal configuration component 199 configured to receive the UE capability information from the UE 104 and configure the UE 104 with respect to the number of configured path loss reference signals and / or the number of activated path loss reference signals based on the UE capability. Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar fields, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0048] Figure 2A 200 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 2D280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure can be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the subcarrier set are dedicated to DL or UL; or can be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within the subcarrier set are dedicated to both DL and UL. Figure 2A , 2C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 1 (all UL), where D is DL, U is UL, and F is for flexible use between DL / UL. Although subframes 3 and 4 are shown as having slot formats 1 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 full DL and full UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured with a slot format (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling) through the received slot format indicator (SFI). Note that the following description also applies to the 5G NR frame structure for TDD.

[0049] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, 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 symbols on the DL may be cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the time slot configuration and parameter design. For slot configuration 0, different parameter designs μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Accordingly, for slot configuration 0 and parameter design μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration vary depending on parameter design. The subcarrier spacing can be equal to 2 μ*15kHz, where μ is parameter design 0 to 4. Thus, parameter design μ=0 has a subcarrier spacing of 15kHz, while parameter design μ=4 has a subcarrier spacing of 240kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figures 2A-2D An example of a slot configuration 0 with 14 symbols per slot and a parameter design μ=2 with 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is about 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 may have a specific parameter design.

[0050] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also called 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.

[0051] like Figure 2A As illustrated in FIG, some REs carry reference (pilot) signals (RS) for UEs. RSs may include demodulation RSs (DM-RSs) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RSs) for channel estimation at the UE. RSs may also include beam measurement RSs (BRSs), beam refinement RSs (BRRSs), and phase tracking RSs (PT-RSs).

[0052] Figure 2BAn example of various DL channels within a subframe of a frame is illustrated. A physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE comprising 6 RE groups (REGs), each REG comprising 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring opportunity on a CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location 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 number of RBs in the system bandwidth, and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted via the PBCH (such as a system information block (SIB)), and paging messages.

[0053] As in Figure 2C As explained in , some REs carry DM-RSs for channel estimation at the base station (indicated as R for one specific configuration, but other DM-RS configurations are possible). The UE may transmit DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first or first two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and on the specific PUCCH format used. The UE may transmit a sounding reference signal (SRS). The SRS may be transmitted in the last symbol of the subframe. The SRS may have a comb structure, and the UE may transmit the SRS on one of the comb teeth. The SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0054] Figure 2DAn example of various UL channels within a subframe of an illustration frame. The PUCCH may be located at a location as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) acknowledgement (HARQ-ACK) information (ACK) / negative ACK (NACK) feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0055] Figure 3 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. 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 media 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 of UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (ciphering, cipher 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.

[0056] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / 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-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time domain and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes and for spatial processing. The channel estimates may be derived from reference signals and / or channel condition feedback transmitted 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 individual spatial stream for transmission.

[0057] At the UE 350, each receiver 354RX receives a signal through its respective 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 may perform spatial processing on the information to recover any spatial stream destined for the UE 350. If there are multiple spatial streams destined for the UE 350, they may be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then transforms 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, as well as the reference signal, are recovered and demodulated by determining the signal constellation point most likely transmitted by the base station 310. These soft decisions may be based on channel estimates calculated by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. These data and control signals are then provided to the controller / processor 359 which implements layer 3 and layer 2 functionality.

[0058] 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, cipher interpretation, 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 ACK and / or NACK protocols to support HARQ operations.

[0059] Similar to the functionality 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 MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0060] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by a TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to a different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding individual spatial stream for transmission.

[0061] 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.

[0062] 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, cipher decoding, 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.

[0063] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 The 198 combined aspects.

[0064] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 The 199 combines all aspects.

[0065] Communication between a base station and a UE may require adaptation to changes in a wireless channel. One adaptation may include power control. For example, the UE may adjust the transmit power based on the channel quality. Power control may be applied by the base station to downlink transmissions and by the UE to uplink transmissions. As an example, if there is good channel quality, the UE may use a lower transmit power, which may reduce interference caused by uplink transmissions and reduce UE power consumption. Power control may be applied by the UE to determine a transmit power that may help avoid interference and reduce power consumption while also helping to ensure that uplink transmissions can be accurately received by the base station. The UE may increase the uplink transmit power to compensate for increased path loss. The UE may measure a reference signal (such as a path loss reference signal) received by the UE from the base station. The UE may use this measurement, along with other factors, to determine the transmit power used for uplink transmissions from the UE.

[0066] The base station may configure a path loss reference signal for the UE for power control associated with an uplink signal of the UE, an uplink channel of the UE, etc. For example, the path loss reference signal may be configured for use by the UE in power control for a sounding reference signal (SRS), a PUSCH, and / or a PUCCH.

[0067] The base station may update the path loss reference signal on a per SRS resource set basis (e.g., in a media access control-control element (MAC-CE)). For example, the base station may use RRC signaling to configure a path loss reference signal set for the SRS at the UE. Subsequently, the base station may update the path loss reference signal on a per SRS resource set basis (e.g., in a MAC-CE), with each activated path loss reference signal coming from the configured path loss reference signal set. Thus, updating the path loss reference signal may refer to activating one or more path loss reference signals from the configured path loss reference signal set. The configured path loss reference signal set may be referred to as a configured path loss reference signal pool.

[0068] The UE may perform L3 filtering on the activated path loss reference signals one by one. L3 filtering may help the UE determine a more stable path loss value for SRS power control. As an example, L3 filtering may include performing a filtering function on the measurements of the activated path loss reference signal before using them to determine the transmit power for uplink transmission. As a non-limiting example, the UE may apply the formula Fn=(1–a)*Fn-1+a*Mn to L3 filtering of the path loss reference signal measurements. In the example formula, Mn is the last received measurement result from the physical layer, and Fn is the updated filtered measurement result used to evaluate reporting criteria or for measurement reporting. Fn-1 is an older filtered measurement, where F0 is set to M1 when the first measurement from the physical layer is received; and for a measurement object (e.g., MeasObjectNR), a=1 / 2(ki / 4), where ki is the filter coefficient (e.g., filterCoefficient) for the corresponding measured quantity of the i-th QuantityConfigNR in the quantityConfigNR list, and i is indicated by quantityConfigIndex in MeasObjectNR; for other measurements, a=1 / 2(k / 4), where k is the filter coefficient for the corresponding measured quantity received by quantityConfig; for UTRA-FDD, a=1 / 2(k / 4), where k is the filter coefficient for the corresponding measured quantity received by the configured quantity (e.g., quantityConfigUTRA-FDD in QuantityConfig). The UE may adapt the filter so that the temporal characteristics of the filter remain unchanged at different input rates, e.g., observing that the filter coefficient k assumes a sampling rate equal to X ms. The value of X may correspond to one intra-frequency L1 measurement period. This value may be a defined value as defined (eg, assuming non-DRX operation) and may depend on the frequency range.

[0069] The SRS may include an aperiodic SRS (AP-SRS) and / or a semi-persistent SRS (SP-SRS). The base station may transmit a MAC-CE that updates the path loss reference signal(s) for the AP-SRS / SP-SRS of the UE.

[0070] The UE may be configured with multiple path loss reference signals through RRC signaling from the base station, and one of the configured path loss reference signals may be activated / updated by the MAC-CE for a specific SRS resource set.

[0071] The base station can use MAC-CE to update the path loss reference signal one by one for the SRS resource indicator (SRI) associated with the PUSCH transmission. For example, the base station can use RRC signaling to configure the path loss reference signal set for the UE. Subsequently, the base station can activate the path loss reference signal one by one SRI, and each activated path loss reference signal comes from the configured path loss reference signal set. The UE can perform L3 filtering on the activated path loss reference signal one by one. L3 filtering can help the UE determine a more stable path loss value for PUSCH power control. Therefore, the MAC-CE message from the base station can activate / update the value of the PUSCH path loss reference signal identifier (ID) (which can be, for example, referred to by a parameter such as "PUSCH-PathlossReferenceRS-Id"). The PUSCH path loss reference signal ID may correspond to a SRIPUSCH power control ID (which can be, for example, referred to by a parameter such as "sri-PUSCH-powercontrolId"). The mapping can be given by a SRIPUSCH power control with a link between the SRIPUSCH power control ID and the PUSCH path loss reference signal ID.

[0072] A higher layer filtered reference signal received power (RSRP) may be used for path loss measurement. The time after the MAC-CE may be provided to the UE to perform path loss measurement. For example, the filtered RSRP value for the previous path loss reference signal may be used until a specific time, which may be referred to as the application time. For example, the application time may be the next time slot after the fifth measurement sample, where the first measurement sample corresponds to the first instance of the path loss reference signal. The first instance of the path loss reference signal may be, for example, 3 ms after the UE sends an ACK in response to receiving a MAC-CE activating the path loss reference signal.

[0073] The activation of the configured path loss reference signal via MAC-CE may be applicable to UEs that support more than four RRC configurable path loss reference signals, and may be applicable when the path loss reference signal activated by the MAC-CE is not tracked by the UE. In some examples, if more than four path loss reference signals are configured in the RRC signaling from the base station, the UE may track the activated path loss reference signal(s). The UE may determine whether to update the filtered RSRP value for the previous path loss reference signal (e.g., 3 ms after sending an ACK in response to the MAC-CE activating the new path loss reference signal).

[0074] The UE may require memory in order to store the configured path loss reference signals at the UE. Additionally, the UE may require hardware and / or software resources to perform L3 filtering on the activated path loss reference signals one by one. In order to provide configuration / activation of path loss reference signals within the capabilities of the UE, aspects of the present disclosure include the UE reporting capability information to a base station indicating a maximum number of configured path loss reference signals supported by the UE and / or a maximum number of activated path loss reference signals supported by the UE.

[0075] Figure 4An example communication flow 400 between a UE 402 and a base station 404 is illustrated. At 401, the UE 402 reports or otherwise indicates information about UE capabilities to the base station 404, including a maximum number of configured path loss reference signals supported by the UE 402 and / or a maximum number of activated path loss reference signals supported by the UE 402. The UE 402 may indicate the capability information via a PUCCH. The maximum number of activated path loss reference signals may be equal to or less than the maximum number of configured path loss reference signals. For example, the maximum number of configured path loss reference signals may have candidate values ​​of 2, 4, 8, 16, 32, ..., 64, 128, etc. The maximum number of activated path loss reference signals may have candidate values ​​of 2, 4, 8, 16, etc., and may not exceed the reported maximum number of configured path loss reference signals supported by the UE. The UE may provide information about UE capabilities based on memory, hardware, and / or software at the UE 402. For example, the UE capability may be based on the amount of memory used to store configuration information about the configured path loss reference signal. The UE may provide information about the UE capability based on hardware or software for performing L3 filtering of the activated path loss reference signal. The information about the UE capability may be used for power control of one or more uplink signals or uplink channels (such as PUSCH, PUCCH and / or SRS). For example, the UE capability information sent to the BS may correspond to a specific type of uplink transmission or a type of uplink channel. For example, the UE capability may be used for power control of a single uplink signal or a single uplink channel. Alternatively, the information about the UE capability may be applied to power control for each uplink signal from the UE 402 or for each uplink channel from the UE 402. Therefore, instead of the UE providing information about the UE capability for a specific uplink signal or a specific uplink channel, the UE may provide information about the UE capability applied to each uplink signal / channel from the UE (e.g., power control for each uplink channel / signal).

[0076] At 403, the base station 404 may configure the UE 402 regarding the number of configured path loss reference signals based on the received information about the UE capabilities, for example, the number may be limited to not exceed the maximum number of configured path loss reference signals indicated by the UE. Thus, the base station 404 may configure the number of path loss reference signals within the capabilities of the UE 402. The path loss reference signal may be configured via RRC signaling from the base station 404.

[0077] At 405, base station 404 may activate a number of path loss reference signals based on information about UE capabilities. The base station may limit the number of activated path loss reference signals to no more than a second maximum number of activated path loss reference signals from the UE capabilities. Thus, base station 404 may activate a number of path loss reference signals within the capabilities of UE 402. The path loss reference signal(s) may be activated via a MAC-CE from base station 404.

[0078] As illustrated at 407, the base station 404 may transmit one or more path loss reference signals corresponding to the activated path loss reference signals. The UE 402 may measure the received path loss reference signals, as illustrated at 409. The UE may determine the path loss based on the measurements. The measurements and / or determination of the path loss at 409 may include L3 filtering of the activated path loss reference signals one by one. At 411, the UE may determine the transmit power for uplink transmission based on the path loss determined from the path loss reference signal(s) 407.

[0079] Subsequently, at 413 , UE 402 may transmit an uplink transmission (such as PUSCH, PUCCH, and / or SRS) using the transmit power determined at 411 based on the path loss from the activated path loss reference signal 407 .

[0080] Therefore, for UEs that support MAC-CE to dynamically update the path loss reference signal for uplink power control, the UE can report its capabilities regarding the path loss reference signal. The base station can use the report of the UE capabilities to configure / activate the amount of path loss reference signal within the capabilities of the UE.

[0081] Figure 5 5 is a flow chart of a wireless communication method. The method may be performed by a UE or a component of a UE (e.g., UE 104, 350, 402; device 602 / 702; cellular baseband processor 704, which may include memory 360 and may be the entire UE 350 or a component of the UE 350 (such as TX processor 368, RX processor 356 and / or controller / processor 359)). The method may assist the UE by providing configuration / activation of a path loss reference signal within the capabilities of the UE.

[0082] At 502, the UE transmits UE capability information corresponding to the configured first maximum number of path loss reference signals and / or the activated second maximum number of path loss reference signals to the base station. The transmission may be performed, for example, by Figure 6608 of the device 602 in the UE. The maximum number of activated path loss reference signals may be equal to or less than the maximum number of configured path loss reference signals. The UE capability information may be based on memory, hardware and / or software at the UE. For example, the UE capability information may be based on the amount of memory used to store configuration information about the configured path loss reference signals. The UE capability information may be based on hardware or software used to perform L3 filtering of the activated path loss reference signals. The UE capability information about the first maximum number of configured path loss reference signals or the second maximum number of activated path loss reference signals may correspond to a path loss reference signal used by the UE for power control of one or more uplink signals or uplink channels (such as PUSCH, PUCCH and / or SRS). For example, as described in conjunction with 806, 808 and 810, the UE may measure the path loss of the activated path loss reference signal, and may determine the transmit power for one or more uplink signals or uplink channels based on the measured path loss. For example, the UE capability information may be used for a specific type of uplink transmission or a type of uplink channel. The UE capabilities may be used for power control of a single uplink signal or a single uplink channel. Alternatively, the UE capability information may be applied to power control for each uplink signal from the UE or for each uplink channel from the UE.

[0083] At 504, the UE receives configuration of at least one of the configured path loss reference signal and / or the activated path loss reference signal from the base station based on the UE capability information. The reception may be performed, for example, by Figure 6 The configuration of the path loss reference signal may be received via RRC signaling from a base station. The activation of the path loss reference signal may be received in a MAC-CE from a base station.

[0084] As illustrated at 506, the UE may measure the path loss of the activated path loss reference signal configured based on the UE capability. For example, the UE capability information provided at 502 regarding the first maximum number of configured path loss reference signals or the second maximum number of activated path loss reference signals may correspond to a path loss reference signal used by the UE for power control of a single uplink signal or a single uplink channel, and the UE may determine the transmit power for the single uplink signal or the single uplink channel based on the path loss of the activated path loss reference signal configured according to the UE capability at 508. The measurement may be performed, for example, by the measurement component 612 of the device 602 or 702. The single uplink channel may be, for example, a PUCCH, a PUSCH, or an SRS. In another example, the UE capability information regarding the first maximum number of configured path loss reference signals or the second maximum number of activated path loss reference signals may correspond to a path loss reference signal used by the UE for power control of each uplink signal or each uplink channel from the UE, and at 508, the UE may determine the transmit power for each uplink signal or each uplink channel based on the path loss of the activated path loss reference signal configured according to the UE capability.

[0085] As illustrated at 508, the UE may determine a transmit power for one or more uplink signals or uplink channels based on the path loss. The determination may be performed, for example, by a power control component 614 of the device 602 or 702 based on the path loss measurement from the measurement component 612. Subsequently, at 510, the UE may transmit an uplink transmission using the transmit power determined at 508. The transmission may be performed, for example, by a transmission component 606 of the device 602 or 702 based on the transmit power received from the power control component 614.

[0086] Figure 6 6 is a conceptual data flow diagram 600 illustrating data flow between different devices / components in an example device 602. The device can be a UE or a component of a UE. The device 602 includes a receiving component 604 configured to receive downlink communications from a base station 650, and a transmitting component 606 configured to transmit uplink communications to the base station 650. The device 602 includes a capability component 608 configured to transmit UE capability information corresponding to at least one of a configured first maximum number of path loss reference signals or an activated second maximum number of path loss reference signals to the base station, e.g., as described in conjunction with Figure 5 The device includes a path loss reference signal component 610, which is configured to receive a configuration of a configured path loss reference signal or an activated path loss reference signal from a base station based on the UE capability information, for example, as combined with Figure 5504 in . The device may include a measurement component 612 configured to perform measurements of the activated path loss reference signal(s), for example, to determine the path loss between the UE and the base station. The device may include a power control component 614 configured to perform power control for uplink transmission based on the path loss.

[0087] The apparatus may include executing Figure 5 The additional components of each box of the algorithm in the preceding flowchart. Thus, Figure 5 Each block in the aforementioned flow chart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specially 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.

[0088] Figure 7 700 is an example of a hardware implementation of an illustrative device 702. The device 702 is a UE and includes a cellular baseband processor 704 (also referred to as a modem) coupled to a cellular RF transceiver 722 and one or more subscriber identity modules (SIM) cards 720, an application processor 706 coupled to a secure digital (SD) card 708 and a screen 710, a Bluetooth module 712, a wireless local area network (WLAN) module 714, a global positioning system (GPS) module 716, and a power supply 718. The cellular baseband processor 704 communicates with the UE 104 and / or BS 102 / 180 through the cellular RF transceiver 722. The cellular baseband processor 704 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transient. The cellular baseband processor 704 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor 704, causes the cellular baseband processor 704 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 704 when executing software. The cellular baseband processor 704 further includes a receiving component 730, a communication manager 732, and a transmission component 734. The communication manager 732 includes one or more of the illustrated components. The components within the communication manager 732 may be stored in a computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 704. The cellular baseband processor 704 may be a component of the UE 350 and may include a memory 360 and / or at least one of the following: a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the device 702 may be a modem chip and include only the baseband processor 704, and in another configuration, the device 702 may be the entire UE (e.g., see Figure 3350) and includes additional modules of device 702.

[0089] The communication manager 732 includes a capability component 608 configured to transmit to the base station a UE capability regarding at least one of the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals, e.g., as described in conjunction with Figure 5 The communication manager 732 further includes a path loss reference signal component 610, which is configured to receive a configuration of at least one of a configured path loss reference signal or an activated path loss reference signal from a base station 650 based on the UE capability, for example, as described in conjunction with Figure 5 The communication manager 732 further includes a measurement component 612 configured to perform measurements of the activated path loss reference signal(s), for example, to determine the path loss between the UE and the base station. The communication manager 732 further includes a power control component 614 configured to perform power control for uplink transmissions based on the path loss.

[0090] The apparatus may include executing Figure 5 The additional components of each box of the algorithm in the preceding flowchart. Thus, Figure 5 Each block in the aforementioned flow chart may be performed by a component and the device may include one or more of these components. These components may be one or more hardware components 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.

[0091] In one configuration, the device 602 / 702, in particular the cellular baseband processor 704, includes a means for transmitting to a base station a UE capability regarding at least one of a first maximum number of configured path loss reference signals or a second maximum number of activated path loss reference signals. The device includes a means for receiving from a base station a configuration regarding at least one of the configured path loss reference signals or the activated path loss reference signals based on the UE capability. The device may further include a means for performing power control for uplink transmission based on (all) path loss reference signals. The device may further include a means for measuring the activated (all) path loss reference signals. The device may further include a means for transmitting uplink transmission using a transmit power based on a path loss determined from a path loss reference signal. The aforementioned means may be one or more of the aforementioned components in the device 702 configured to perform the functions described by the aforementioned means. As described above, the device 702 may include a TX processor 368, an RX processor 356, and a controller / processor 359. As such, 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.

[0092] Figure 8 800 is a flow chart of a method of wireless communication. The method may be performed by a base station or a component of a base station (e.g., base station 102, 180, 310, 404; device 902 / 1002; baseband unit 1004, which may include memory 376 and which may be the entire base station 310 or a component of the base station 310 (such as TX processor 316, RX processor 370 and / or controller / processor 375)). The method may help the base station configure the UE with respect to a path loss reference signal and / or activate a path loss reference signal for the UE within the capabilities of the UE.

[0093] At 802, the base station receives UE capability information about a first maximum number of configured path loss reference signals and / or a second maximum number of activated path loss reference signals from a UE. The receiving may be performed, for example, by Fig. 9 The UE capability information regarding the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals may correspond to a path loss reference signal used by the UE for power control of one or more uplink signals or uplink channels (such as PUSCH, PUCCH and / or SRS).

[0094] For example, the UE capability information may be used for a specific type of uplink transmission or a type of uplink channel. The UE capability information may be used for a path loss reference signal used by the UE to perform power control of a single uplink signal or a single uplink channel. Alternatively, the UE capability information may be applied to power control for each uplink signal from the UE or for each uplink channel from the UE.

[0095] At 804, the base station configures the UE regarding the third number of configured path loss reference signals or the fourth number of activated path loss reference signals based on the UE capability information. The configuration may be performed by, for example, Fig. 9 804 , the base station may provide the UE with a power control configuration including at least one of the third number of configured path loss reference signals or the fourth number of activated path loss reference signals based on the UE capability. As another example, the UE capability information about the first maximum number of configured path loss reference signals or the second maximum number of activated path loss reference signals may correspond to the path loss reference signal used by the UE for power control of one or more uplink signals or uplink channels, and at 804 , the base station may provide the UE with a power control configuration including at least one of the third number of configured path loss reference signals or the fourth number of activated path loss reference signals based on the UE capability. As another example, the UE capability information about the first maximum number of configured path loss reference signals or the second maximum number of activated path loss reference signals may correspond to the path loss reference signal used by the UE for power control of a single uplink signal or a single uplink channel, and at 804 , the base station may provide the UE with a power control configuration including at least one of the third number of configured path loss reference signals or the fourth number of activated path loss reference signals based on the UE capability information for a single uplink signal or a single uplink channel. The single uplink channel may be, for example, a PUSCH, a PUCCH, or an SRS.

[0096] The UE capability information may include a first maximum number of configured path loss reference signals, and the base station may limit a third number of configured path loss reference signals to not exceed the first maximum number of configured path loss reference signals from the UE capability. The UE capability information may include a second maximum number of activated path loss reference signals, and the base station may limit a fourth number of activated path loss reference signals to not exceed the second maximum number of activated path loss reference signals from the UE capability information. The path loss reference signal may be configured via RRC signaling from the base station. The path loss reference signal(s) may be activated via MAC-CE from the base station.

[0097] Fig. 9900 is a conceptual data flow diagram illustrating data flow between different means / components in an example apparatus 902. The apparatus may be a base station or a component of a base station. The apparatus includes a receiving component 904 configured to receive uplink communications from a UE 950, and a transmitting component 906 configured to transmit downlink communications to the UE 950. The apparatus includes a capability component 908 configured to receive UE capability information corresponding to a configured first maximum number of path loss reference signals and / or an activated second maximum number of path loss reference signals from the UE, e.g., as described in conjunction with Figure 8 The device includes a configuration component 910, which is configured to configure the UE based on the UE capability information regarding at least one of the third number of configured path loss reference signals and / or the fourth number of activated path loss reference signals, for example, as combined with Figure 8 As described in 804.

[0098] The apparatus may include executing Figure 8 The additional components of each box of the algorithm in the preceding flowchart. Thus, Figure 8 Each block in the aforementioned flow chart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specially 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.

[0099] Fig.10 1002 is an example of a hardware implementation of the device 1000. The device 1002 is a BS and includes a baseband unit 1004. The baseband unit 1004 can communicate with the UE 104 through a cellular RF transceiver 1022. The baseband unit 1004 may include a computer-readable medium / memory. The baseband unit 1004 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the baseband unit 1004, enables the baseband unit 1004 to perform the various functions described above. The computer-readable medium / memory can also be used to store data manipulated by the baseband unit 1004 when executing the software. The baseband unit 1004 further includes a receiving component 1030, a communication manager 1032, and a transmission component 1034. The communication manager 1032 includes one or more of the illustrated components. The components within the communication manager 1032 can be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 1004. The baseband unit 1004 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 .

[0100] The communication manager 1032 includes a capability component 908 configured to receive from the UE a UE capability regarding a first maximum number of configured path loss reference signals and / or a second maximum number of activated path loss reference signals, e.g., as described in conjunction with Figure 8 The communication manager 1032 further includes a configuration component 910 configured to configure the UE based on the UE capability regarding at least one of the third number of configured path loss reference signals and / or the fourth number of activated path loss reference signals, for example, as described in conjunction with Figure 8 As described in 804.

[0101] The apparatus may include executing Figure 8 The additional components of each box of the algorithm in the preceding flowchart. Thus, Figure 8 Each block in the aforementioned flow chart may be performed by a component and the device may include one or more of these components. These components may be one or more hardware components 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.

[0102] In one configuration, the device 902 / 1002, in particular the baseband unit 1004, includes a device for receiving from the UE a UE capability regarding a first maximum number of configured path loss reference signals and / or a second maximum number of activated path loss reference signals. The device may include a device for configuring the UE based on the UE capability information regarding at least one of a third number of configured path loss reference signals and / or a fourth number of activated path loss reference signals. The aforementioned device may be one or more of the aforementioned components in the device 1002 configured to perform the functions described by the aforementioned device. As described above, the device 1002 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Thus, in one configuration, the aforementioned device may be a TX processor 316, an RX processor 370, and a controller / processor 375 configured to perform the functions described by the aforementioned device.

[0103] It should be understood that the specific order or hierarchy of each box in the disclosed process / flowchart is an illustration of an example approach. It should be understood that the specific order or hierarchy of each box in these process / flowcharts can be rearranged based on design preferences. In addition, some boxes can be combined or omitted. The attached method claims present the elements of various boxes in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0104] The previous 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 easily understood by those skilled in the art, and the universal principles defined in this article can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown in this article, but should be granted the full scope consistent with the claims in language, wherein the singular reference of the elements is not intended to represent "there is and only one", but "one or more", unless otherwise stated. The wording "exemplary" is used herein to mean "used as an example, instance or explanation". Any aspect described as "exemplary" herein does not have to be interpreted as being superior to or superior to other aspects. Unless otherwise stated, the term "some / certain" 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 A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents of the elements of the various aspects described throughout this disclosure that are currently or hereafter known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly recorded in the claims. The terms "module," "mechanism," "element," "device," and the like may not be a substitute for the term "means." Thus, no claim element should be interpreted as a means-plus-function unless the element is explicitly stated using the phrase "means for..."

[0105] The following examples are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0106] Aspect 1 is a method for performing wireless communications at a user equipment (UE), comprising: transmitting UE capability information corresponding to at least one of a first maximum number of configured path loss reference signals or a second maximum number of activated path loss reference signals to a base station; and receiving configuration of at least one of the configured path loss reference signals or the activated path loss reference signals from the base station based on the UE capability.

[0107] In aspect 2, the method of aspect 1 further comprises: the UE capability information comprises a first maximum number of configured path loss reference signals.

[0108] In aspect 3, the method of aspect 1 further comprises: the UE capability information comprises a second maximum number of activated path loss reference signals.

[0109] In aspect 4, the method of aspect 1 further includes: the UE capability information includes a first maximum number of configured path loss reference signals and a second maximum number of activated path loss reference signals.

[0110] In aspect 5, the method of any one of aspects 1-4 further comprises the second maximum number of activated path loss reference signals being equal to or less than the first maximum number of configured path loss reference signals.

[0111] In aspect 6, the method as in any one of aspects 1-5 further includes: the UE capability information about the first maximum number of configured path loss reference signals or the second maximum number of activated path loss reference signals corresponds to the path loss reference signal used by the UE for power control of one or more uplink signals or uplink channels, and the method further includes: measuring the path loss of the activated path loss reference signal configured based on the UE capability; and determining the transmit power for one or more uplink signals or uplink channels based on the path loss.

[0112] In aspect 7, the method as in aspect 6 further includes: UE capability information about the first maximum number of configured path loss reference signals or the second maximum number of activated path loss reference signals corresponds to the path loss reference signal used by the UE for power control of a single uplink signal or a single uplink channel, and wherein the UE determines the transmit power for the single uplink signal or a single uplink channel based on the path loss of the activated path loss reference signal configured according to the UE capability.

[0113] In aspect 8, the method of aspect 7 further comprises: the single uplink channel comprises one of PUSCH, PUCCH or SRS.

[0114] In aspect 9, the method as in aspect 6 further includes: UE capability information about the first maximum number of configured path loss reference signals or the second maximum number of activated path loss reference signals corresponds to the path loss reference signal used by the UE for power control of each uplink signal or each uplink channel from the UE, and wherein the UE determines the transmit power for each uplink signal or each uplink channel based on the path loss of the activated path loss reference signal configured according to the UE capability.

[0115] Aspect 10 is an apparatus for wireless communication, comprising: at least one processor coupled to a memory and configured to implement the method of any one of aspects 1 to 9.

[0116] Aspect 11 is an apparatus for wireless communication, comprising means for implementing the method as in any one of aspects 1 to 9.

[0117] Aspect 12 is a non-transitory computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement the method of any one of aspects 1 to 9.

[0118] Aspect 13 is a method for performing wireless communications at a base station, comprising: receiving UE capability information corresponding to at least one of a first maximum number of configured path loss reference signals or a second maximum number of activated path loss reference signals from a UE; and configuring the UE based on the UE capability regarding at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals.

[0119] In aspect 14, the method of aspect 13 further includes: the UE capability information includes a first maximum number of configured path loss reference signals, and wherein the base station limits the third number of configured path loss reference signals to not exceed the first maximum number of configured path loss reference signals from the UE capability.

[0120] In aspect 15, the method of aspect 13 further includes: the UE capability information includes a second maximum number of activated path loss reference signals, and wherein the base station limits the fourth number of activated path loss reference signals to not exceed the second maximum number of activated path loss reference signals from the UE capability.

[0121] In aspect 15, the method of aspect 13 further includes: the UE capability information includes a first maximum number of configured path loss reference signals and a second maximum number of activated path loss reference signals, wherein the base station limits the third number of configured path loss reference signals to not exceed the first maximum number of configured path loss reference signals from the UE capability, and the base station limits the fourth number of activated path loss reference signals to not exceed the second maximum number of activated path loss reference signals from the UE capability.

[0122] In aspect 17, the method of any one of aspects 13-16 further comprises the second maximum number of activated path loss reference signals being equal to or less than the first maximum number of configured path loss reference signals.

[0123] In aspect 18, a method as in any of aspects 13-17 further includes UE capability information regarding a first maximum number of configured path loss reference signals or a second maximum number of activated path loss reference signals corresponding to path loss reference signals used by the UE for power control of one or more uplink signals or uplink channels, and wherein the base station provides a power control configuration including at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals to the UE based on the UE capability.

[0124] In aspect 19, the method as in aspect 18 further includes UE capability information about a first maximum number of configured path loss reference signals or a second maximum number of activated path loss reference signals corresponding to a path loss reference signal used by the UE for power control of a single uplink signal or a single uplink channel, and wherein the base station provides the UE with a power control configuration for the single uplink signal or the single uplink channel including at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals based on the UE capability.

[0125] In aspect 20, the method of aspect 19 further comprises: the single uplink channel comprises one of PUSCH, PUCCH or SRS.

[0126] In aspect 21, the method as in aspect 18 further includes UE capability information about a first maximum number of configured path loss reference signals or a second maximum number of activated path loss reference signals corresponding to a path loss reference signal used by the UE for power control of each uplink signal or each uplink channel from the UE, and wherein the base station provides the UE with a power control configuration for each uplink signal or each uplink channel including at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals based on the UE capability.

[0127] Aspect 22 is an apparatus for wireless communication, comprising: at least one processor coupled to a memory and configured to implement the method of any one of aspects 13 to 21.

[0128] Aspect 23 is an apparatus for wireless communication, comprising means for implementing the method as in any one of aspects 13 to 21.

[0129] Aspect 24 is a computer-readable medium storing a computer-executable code, wherein the code, when executed by a processor, causes the processor to implement the method of any one of aspects 13 to 21.

Claims

1. A method for wireless communication at a user equipment UE, comprising: transmitting, to a base station, UE capability information corresponding to at least one of the configured first maximum number of path loss reference signals or the second maximum number of activated path loss reference signals, the UE capability information being associated with a UE capability to perform layer 3L3 filtering on one or more activated path loss reference signals; as well as A configuration regarding at least one of a configured path loss reference signal or an activated path loss reference signal is received from the base station based on the UE capability information, wherein the activated path loss reference signal is associated with at least one sounding reference signal (SRS) resource set.

2. The method of claim 1, wherein the UE capability information comprises a first maximum number of configured path loss reference signals. 3 . The method of claim 1 , wherein the UE capability information comprises a second maximum number of activated path loss reference signals.

4. The method of claim 1, wherein the UE capability information comprises a first maximum number of configured path loss reference signals and a second maximum number of activated path loss reference signals. 5 . The method of claim 4 , wherein the second maximum number of activated path loss reference signals is equal to or less than the first maximum number of configured path loss reference signals.

6. The method of claim 1 , wherein the UE capability information about the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals corresponds to a path loss reference signal used by the UE for power control of one or more uplink signals or uplink channels, the method further comprising: Measuring a path loss of an activated path loss reference signal configured based on the UE capability information; as well as A transmit power for the one or more uplink signals or uplink channels is determined based on the path loss.

7. The method of claim 6, wherein the UE capability information about the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals corresponds to the path loss reference signal used by the UE for power control of a single uplink signal or a single uplink channel, and The UE determines the transmit power for the single uplink signal or the single uplink channel based on the path loss of the activated path loss reference signal configured according to the UE capability information. 8 . The method of claim 7 , wherein the single uplink channel comprises one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference signal (SRS).

9. The method of claim 6, wherein the UE capability information about the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals corresponds to the path loss reference signal used by the UE for power control of each uplink signal or each uplink channel from the UE, and The UE determines the transmit power for each uplink signal or each uplink channel based on the path loss of the activated path loss reference signal configured according to the UE capability information.

10. A method for wireless communication at a base station, comprising: receiving, from a user equipment UE, UE capability information corresponding to at least one of a configured first maximum number of path loss reference signals or a second maximum number of activated path loss reference signals, the UE capability information being associated with a UE capability to perform layer 3L3 filtering on one or more activated path loss reference signals; as well as The UE is configured with respect to a third number of configured path loss reference signals or a fourth number of activated path loss reference signals based on the UE capability information, wherein the fourth number of activated path loss reference signals is associated with at least one sounding reference signal (SRS) resource set.

11. A method as claimed in claim 10, wherein the UE capability information includes a first maximum number of configured path loss reference signals, and wherein the base station limits the third number of configured path loss reference signals to not exceed the first maximum number of configured path loss reference signals from the UE capability information.

12. A method as claimed in claim 10, wherein the UE capability information includes a second maximum number of activated path loss reference signals, and wherein the base station limits the fourth number of activated path loss reference signals to not more than the second maximum number of activated path loss reference signals from the UE capability information.

13. The method of claim 10, wherein the UE capability information comprises a first maximum number of configured path loss reference signals and a second maximum number of activated path loss reference signals, wherein the base station limits the third number of configured path loss reference signals to not exceed the first maximum number of configured path loss reference signals from the UE capability information, and The base station limits a fourth number of activated path loss reference signals to not exceed a second maximum number of activated path loss reference signals from the UE capability information.

14. The method of claim 13, wherein the second maximum number of activated path loss reference signals is equal to or less than the first maximum number of configured path loss reference signals.

15. The method of claim 10, wherein the UE capability information regarding the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals corresponds to a path loss reference signal used by the UE for power control of one or more uplink signals or uplink channels, and The base station provides, to the UE, a power control configuration including at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals based on the UE capability information.

16. The method of claim 15, wherein the UE capability information about the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals corresponds to the path loss reference signal used by the UE for power control of a single uplink signal or a single uplink channel, and The base station provides the UE with a power control configuration for the single uplink signal or the single uplink channel, including at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals, based on the UE capability information.

17. The method of claim 16, wherein the single uplink channel is one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference signal (SRS).

18. The method of claim 15, wherein the UE capability information about the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals corresponds to the path loss reference signal used by the UE for power control of each uplink signal or each uplink channel from the UE, and The base station provides the UE with a power control configuration for each uplink signal or each uplink channel, including at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals, based on the UE capability information.

19. An apparatus for wireless communication at a user equipment (UE), comprising: Memory; as well as at least one processor coupled to the memory and configured to: transmitting, to a base station, UE capability information corresponding to at least one of the configured first maximum number of path loss reference signals or the second maximum number of activated path loss reference signals, the UE capability information being associated with a UE capability to perform layer 3L3 filtering on one or more activated path loss reference signals; as well as A configuration regarding at least one of a configured path loss reference signal or an activated path loss reference signal is received from the base station based on the UE capability information, wherein the activated path loss reference signal is associated with at least one sounding reference signal (SRS) resource set.

20. The apparatus of claim 19, wherein the UE capability information comprises a first maximum number of configured path loss reference signals.

21. The apparatus of claim 19, wherein the UE capability information comprises a second maximum number of activated path loss reference signals.

22. The apparatus of claim 19, wherein the UE capability information comprises a first maximum number of configured path loss reference signals and a second maximum number of activated path loss reference signals.

23. The apparatus of claim 22, wherein the second maximum number of activated path loss reference signals is equal to or less than the first maximum number of configured path loss reference signals.

24. The apparatus of claim 19, wherein the UE capability information regarding the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals corresponds to a path loss reference signal used by the UE for power control of one or more uplink signals or uplink channels, the at least one processor being further configured to: measuring a path loss of an activated path loss reference signal configured based on the UE capability information; and A transmit power for the one or more uplink signals or uplink channels is determined based on the path loss.

25. The apparatus of claim 24, wherein the UE capability information regarding the configured first maximum number of path loss reference signals or the activated second maximum number of path loss reference signals corresponds to the path loss reference signal used by the UE for power control of a single uplink signal or a single uplink channel, and The device determines the transmit power for the single uplink signal or the single uplink channel based on the path loss of the activated path loss reference signal configured according to the UE capability information.

26. The apparatus of claim 25, wherein the single uplink channel comprises at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a sounding reference signal (SRS).

27. An apparatus for wireless communication at a base station, comprising: Memory; as well as at least one processor coupled to the memory and configured to: receiving, from a user equipment UE, UE capability information corresponding to at least one of a configured first maximum number of path loss reference signals or a second maximum number of activated path loss reference signals, the UE capability information being associated with a UE capability to perform layer 3L3 filtering on one or more activated path loss reference signals; as well as The UE is configured based on the UE capability information regarding at least one of a third number of configured path loss reference signals or a fourth number of activated path loss reference signals, wherein the fourth number of activated path loss reference signals is associated with at least one sounding reference signal (SRS) resource set.

28. The apparatus of claim 27, wherein the UE capability information comprises a configured first maximum number of path loss reference signals.

29. The apparatus of claim 27, wherein the UE capability information comprises a second maximum number of activated path loss reference signals.

30. The apparatus of claim 27, wherein the UE capability information comprises a first maximum number of configured path loss reference signals and a second maximum number of activated path loss reference signals, wherein the apparatus limits a third number of configured path loss reference signals to not exceed a first maximum number of configured path loss reference signals from the UE capability information, and Wherein the apparatus limits a fourth number of activated path loss reference signals to not exceed a second maximum number of activated path loss reference signals from the UE capability information.

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