Wireless communication method, device and computer readable medium

Abstract

A method, an apparatus, and a computer readable medium for wireless communication by a user equipment (UE) are provided. The method includes determining a reference power headroom (PH) for reporting at least one carrier frequency in a transmission time interval (TTI); determining an index j of a target received power Po and a path loss scaling factor alpha of a physical uplink shared channel (PUSCH) to be transmitted in the TTI, an index qd of a reference signal for measuring path loss of the carrier frequency, and an index l of a power control process for the carrier frequency, the determining comprises determining a fixed value of an index j based on a fixed value of a path loss scaling factor alpha and a fixed value of a target received power Po; calculating the reference PH based on one or more of the determined indexes; and reporting a power headroom report (PHR) including the reference PH of the carrier frequency in the TTI.

Description

[0001] This application is a divisional application of the invention patent application with the application date of January 18, 2019, application number 201980008549.6, and invention name “Reference Power Headroom Report”.

[0002] This application claims priority to U.S. Application No. 16 / 250,651, filed on January 17, 2019, which claims priority to and the benefit of U.S. Provisional Application No. 62 / 619,712, filed on January 19, 2018, entitled “REFERENCE POWER HEADROOM REPORT FOR NEW RADIO (NR)”, both of which are expressly incorporated herein by reference in their entirety. Technical Field

[0003] The present disclosure relates generally to wireless communication systems, and more particularly, to methods and apparatus for generating and reporting a reference power headroom report (PHR). Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple-access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). Examples of such multiple-access technologies include Long Term Evolution (LTE) systems, 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.

[0005] In some examples, a wireless multiple access communication system may include multiple base stations, each base station simultaneously supporting communication for multiple communication devices, also known as user equipment (UE). In an LTE or LTE-A network, a group of one or more base stations may define an eNodeB (eNB). In other examples (e.g., in a next generation or fifth generation (5G) network), a wireless multiple access communication system may include multiple distribution units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmission reception points (TRPs), etc.) communicating with multiple central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), wherein a group of one or more distribution units communicating with a central unit may define an access node (e.g., a new radio base station (NR BS), a new radio node-B (NR NB), a network node, a 5GNB, an eNB, etc.). A base station or DU may communicate with a group of UEs on a downlink channel (e.g., for transmission from a base station or to a UE) and an uplink channel (e.g., for transmission from a UE to a base station or distribution unit).

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. An example of an emerging telecommunication standard is New Radio (NR), for example, 5G radio access. NR is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). It is designed to better support mobile broadband Internet access by using OFDMA with a cyclic prefix (CP) on the downlink (DL) and uplink (UL) to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards, as well as support beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] However, as demand for mobile broadband access continues to increase, there is a desire to further improve NR technology. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ them. Summary of the invention

[0008] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is responsible for its desirable attributes. Without limiting the scope of the present disclosure as indicated by the claims that follow, certain features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide advantages including improved communication between access points and stations in a wireless network.

[0009] Certain aspects of the present disclosure provide a method for wireless communication of a user equipment (UE). The method generally includes: determining a reference power headroom (PH) for reporting at least one carrier frequency in a transmission time interval (TTI), determining a target received power and a path loss proportionality factor index (j) of a physical uplink shared channel (PUSCH) to be transmitted in the TTI, an index (q) of a reference signal for measuring the path loss of the carrier frequency, d ) or at least one of the indices (l) for the power control process for the carrier frequency, calculating a reference PH based on one or more of the determined at least one index, and reporting a power headroom report (PHR) including the reference PH for the carrier frequency in a TTI.

[0010] Certain aspects of the present disclosure provide an apparatus for wireless communication of a user equipment (UE). The apparatus generally includes: means for determining a reference power headroom (PH) for reporting at least one carrier frequency in a transmission time interval (TTI); an index (j) for determining a target received power and a path loss proportionality factor of a physical uplink shared channel (PUSCH) to be transmitted in the TTI, an index (q) for measuring a reference signal for the path loss of the carrier frequency; d ) or at least one of the indices (l) for power control processing of the carrier frequency; a device for calculating a reference based on one or more of the determined at least one index; and a device for reporting a power headroom report (PHR) including a reference PH of the carrier frequency in a TTI.

[0011] Certain aspects of the present disclosure provide an apparatus for wireless communication of a user equipment (UE). The apparatus generally includes at least one processor and a memory coupled to the at least one processor. The at least one processor is generally configured to: determine a reference power headroom (PH) for reporting at least one carrier frequency in a transmission time interval (TTI); determine a target received power and a path loss proportionality factor index (j) of a physical uplink shared channel (PUSCH) to be sent in the TTI, an index (q) of a reference signal for measuring the path loss of the carrier frequency; d ) or at least one of the indices (l) for the power control process of the carrier frequency; calculating a reference PH based on one or more of the determined at least one index; and reporting a power headroom report (PHR) including the reference PH of the carrier frequency in a TTI.

[0012] Certain aspects of the present disclosure provide a computer-readable medium for wireless communication of a user equipment (UE). The computer-readable medium stores instructions that, when executed by at least one processor, perform a method that generally includes the following steps: determining a reference power headroom (PH) for reporting at least one carrier frequency in a transmission time interval (TTI); determining a target received power and a path loss proportionality factor index (j) of a physical uplink shared channel (PUSCH) to be transmitted in the TTI, an index (q) of a reference signal for measuring the path loss for the carrier frequency; d ) or at least one of the indices (l) for the power control process of the carrier frequency; calculating a reference PH based on one or more of the determined at least one index; and reporting a power headroom report (PHR) including the reference PH of the carrier frequency in a TTI.

[0013] Aspects generally include methods, apparatus, systems, computer-readable media, and processing systems as substantially described herein with reference to and as illustrated in the accompanying drawings.

[0014] For the foregoing and related implementations, one or more aspects include features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings specifically illustrate certain illustrative features of one or more aspects. However, these features are indicative of only a few of the various ways in which the principles of the various aspects can be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order that the manner in which the above-mentioned features of the present disclosure are specifically understood, a more particular description of the above brief description may be made by reference to various aspects, some of which are shown in the accompanying drawings. However, it is to be noted that the drawings illustrate only certain typical aspects of the present disclosure and are therefore not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0016] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0017] Figure 2 is a block diagram illustrating an example logical structure of a distributed RAN in accordance with certain aspects of the present disclosure.

[0018] Figure 3 is a diagram illustrating an example physical architecture of a distributed RAN in accordance with certain aspects of the present disclosure.

[0019] Figure 4 is a block diagram conceptually illustrating a design of an example BS and user equipment (UE) in accordance with certain aspects of the present disclosure.

[0020] Figure 5is a diagram illustrating an example for implementing a communication protocol stack in accordance with certain aspects of the present disclosure.

[0021] Figure 6 An example of a downlink center (DL center) subframe is illustrated in accordance with certain aspects of the present disclosure.

[0022] Figure 7 An example of an uplink center (UL center) subframe is illustrated in accordance with certain aspects of the present disclosure.

[0023] Figure 8 Illustrated is the timing of power headroom report transmissions by a UE in accordance with certain aspects of the present disclosure.

[0024] Fig. 9 Illustrated are example operations for generating and reporting a reference PHR by a UE in accordance with certain aspects of the present disclosure.

[0025] Fig.10 The illustration may include a communication device that includes various components configured to perform operations for the techniques disclosed herein according to aspects of the present disclosure.

[0026] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the various figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation. DETAILED DESCRIPTION

[0027] The power headroom (PH) generally indicates how much transmission power the UE has left to use in addition to the power being used for current transmissions (e.g., physical uplink shared channel (PUSCH) transmissions). The power headroom can be described as the maximum UE transmission power minus the current PUSCH power. A positive value of the power headroom indicates that the UE has more power to spare for UL transmissions. A negative value of the power headroom indicates that the UE is required to transmit at a higher power than the UE is allowed to transmit.

[0028] Power Headroom Report (PHR) is a type of Medium Access Control (MAC) Control Element (MAC CE) that reports the headroom between the current UE Tx power (estimated power) and the maximum power. The network (e.g., base station) uses this report value to estimate how much uplink bandwidth the UE can use for a particular subframe.

[0029] In certain aspects, for cases when the UE does not have allocation information available when calculating the PH, a reference PHR is reported that is different from the actual PHR. For example, in the case of carrier aggregation (CA), there may be multiple carriers / cells configured for the UE, but when calculating the PH (e.g., based on a PHR trigger), there may be data scheduled only for a subset of the carriers in a particular TTI (e.g., time slot). In this case, for those carriers that do not have any uplink data scheduled in the TTI, the UE reports a reference PHR for that TTI. In one aspect, unlike the actual PH, the reference PH is not based on downlink control information (DCI) decoded by the UE.

[0030] Certain aspects of the present disclosure discuss methods for determining, for reference PH calculation, at least one of: a target received power for a PUSCH to be transmitted in a TTI and an index of a path loss proportionality factor (j), an index of a reference signal for measuring a path loss of a carrier frequency (q d ) or at least one of the indexes (l) of the power control process for the carrier frequency so that the network can best estimate the path loss information of a specific carrier frequency based on the reported PH.

[0031] NR can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., more than 80 MHz), millimeter wave (mmW) targeting high carrier frequency (e.g., 60 GHz), large MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission criteria targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) that meet various quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0032] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various processes or components may be appropriately omitted, replaced or added to each example. For example, the method described may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, the features described with respect to certain examples may be combined in certain other examples. For example, a device or a method of practice may be implemented using any number of aspects set forth herein. In addition, the scope of the present disclosure is intended to cover such a device or method that uses a device or method of practice using other structures, functionalities or structures and functionalities other than the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be specifically represented by one or more elements of the claims. The word "exemplary" is used here to refer to "used as an example, example or illustration". Any aspect described as "exemplary" here is not necessarily considered to be preferred or beneficial relative to other aspects.

[0033] The techniques described herein can be used in various wireless communication networks, such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). NR is an emerging wireless communication technology under development in conjunction with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and Advanced LTE (LTE-A) are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used for the wireless networks and radio technologies described above as well as other wireless networks and radio technologies. For clarity, although various aspects may be described herein using terms commonly associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied to communication systems based on other generations, such as 5G and later, including NR technologies.

[0034] Example Wireless Communication System

[0035] Figure 1 An example wireless network 100, such as a New Radio (NR) or 5G network, is illustrated in which aspects of the present disclosure may be implemented. Figure 1 Any one or more of the illustrated UEs 120 may perform techniques for calculating and reporting power headroom reports according to aspects of this disclosure.

[0036] like Figure 1As shown, the wireless network 100 may include multiple BS110 and other network entities. The BS may be a station that communicates with the UE. Each BS110 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a Node B and / or a Node B subsystem serving the coverage area, depending on the context in which the term is used. In the NR system, the term "cell" and eNB, Node B, 5G NB, AP, NR BS, NR BS or TRP may be interchangeable. In some examples, the cell may not necessarily be static, and the geographical area of ​​the cell may move according to the location of the mobile base station. In some examples, the base station may use any appropriate transmission network to interconnect with each other and / or with one or more other base stations or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as direct physical connections, virtual networks, etc.

[0037] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific radio access technology (RAT) and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0038] A BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a home, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more (e.g., three) cells.

[0039] The wireless network 100 may also include a relay station. A relay station is a station that receives transmissions of data and / or other information from an upstream station (e.g., a BS or a UE) and sends transmissions of data and / or other information to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that relays transmissions of other UEs. Figure 1 In the example shown, a relay station 110r may communicate with the BS 110a and the UE 120r to facilitate communication between the BS 110a and the UE 120r. A relay station may also be referred to as a relay BS, a relay, or the like.

[0040] The wireless network 100 may be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, relays, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects of interference on the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 20 watts), while a pico BS, a femto BS, and a relay may have a lower transmit power level (e.g., 1 watt).

[0041] Wireless network 100 can support synchronous or asynchronous operation. For synchronous operation, BSs can have similar frame timing, and transmissions from different BSs can be roughly aligned in time. For asynchronous operation, BSs can have different frame timing, and transmissions from different BSs may not be aligned in time. The techniques described herein can be used for both synchronous and asynchronous operation.

[0042] A network controller 130 may couple to a set of BSs and provide coordination and control for these BSs. The network controller 130 may communicate with the BSs 110 via a backhaul. The BSs 110 may also communicate with each other, for example, directly or indirectly via a wireless or wireline backhaul.

[0043] UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a customer premises equipment (CPE), a cellular phone, a smart phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smart book, an ultrabook, a medical device or medical equipment, a biometric sensor / device, a healthcare device, a medical device, a wearable device such as a smart watch, smart clothes, smart glasses, virtual reality goggles, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet, etc.), an entertainment device (e.g., a music device, a gaming device, a video device, a satellite radio, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a positioning device (e.g., GPS, BeiDou, GLONASS, Galileo, ground-based), or any other suitable device configured to communicate via a wireless or wired medium. Some UEs may be considered as machine type communication (MTC) devices or enhanced or evolved MTC (eMTC) devices. MTC may refer to at least one remote device at at least one end of the communication, and may include forms of data communication involving one or more entities that do not necessarily require human interaction. MTC UEs may include, for example, UEs capable of MTC communication with an MTC server and / or other MTC devices via a public land mobile network (PLMN). Some UEs may be considered as Internet of Things devices. The Internet of Things (IoT) is a network of physical objects or "things" embedded with, for example, electronic devices, software, sensors, and network connectivity that enable these objects to collect and exchange data. The Internet of Things allows objects to be remotely sensed and controlled across existing network infrastructure, creating opportunities for more direct integration between the physical world and computer-based systems, and leading to improved efficiency, precision, and economic benefits. When the IoT is enhanced with sensors and actuators, the technology becomes an example of a more general type of computer-physical system, which also includes technologies such as smart grids, smart homes, smart transportation, and smart cities. Each "thing" is typically uniquely identifiable by its embedded computing system, but is able to interoperate within the existing Internet infrastructure. Narrowband IoT (NB-IoT) is a technology standardized by the 3GPP standards organization. The technology is a narrowband radio technology specifically designed for IoT, hence the name. The special focus of the standard is on indoor coverage, low cost, long battery life, and a large number of devices.MTC / eMTC and / or IoT UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location markers, etc. that can communicate with a BS, another apparatus (e.g., a remote device), or some other entity. A wireless node may, for example, provide connectivity for or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Figure 1 In FIG. 1 , a solid line with double arrows indicates desired transmission between a UE and a serving BS, which is a BS designated to serve the UE on a downlink and / or uplink. A dashed line with double arrows indicates interfering transmissions between a UE and a BS.

[0044] Some wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth (e.g., system frequency band) into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, the spacing of the subcarriers can be 15kHz, and the minimum resource allocation (called a "resource block") can be 12 subcarriers (or 180kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal FFT size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth can also be divided into subbands. For example, a subband may cover 1.08 MHz (ie, 6 resource blocks), and there may be 1, 2, 4, 8, or 16 subbands for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, respectively.

[0045] Although aspects of the examples described herein may be associated with LTE technology, aspects of the present disclosure may be applicable to other wireless communication systems, such as NR. NR may utilize OFDM with CP on the uplink and downlink, and include support for half-duplex operation using time division duplex (TDD). A single component carrier bandwidth of 100 MHz may be supported. NR resource blocks may span 12 subcarriers over a 0.1 millisecond duration, with a subcarrier bandwidth of 75 kHz. Each radio frame may consist of 50 subframes having a length of 10 milliseconds. Thus, each subframe may have a length of 0.2 milliseconds. Each subframe may indicate a link direction (ie, DL or UL) for data transmission, and the link direction of each subframe may be switched dynamically. Each subframe may include DL / UL data and DL / UL control data. The UL and DL subframes for NR may be as follows relative to Figure 6 and Figure 7 Described in more detail. Beam forming can be supported, and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. MIMO configuration in DL can support up to 8 transmit antennas, and multi-layer DL transmission supports up to 8 streams and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE can be supported. Up to 8 serving cells can support aggregation of multiple cells. Alternatively, NR can support different air interfaces other than OFDM-based. The NR network can include such CU and / or DU entities.

[0046] In some examples, access to the air interface can be scheduled, wherein a scheduling entity (e.g., a base station) allocates resources for communication among some or all devices and equipment within its service area or cell. In the present disclosure, as further discussed below, a scheduling entity may be responsible for scheduling, allocating, reconfiguring, and releasing resources of one or more subordinate entities. That is, for scheduled communications, subordinate entities utilize resources allocated by the scheduling entity. The base station is not the only entity that can be used as a scheduling entity. That is, in some examples, a UE may be used as a scheduling entity, scheduling resources of one or more subordinate entities (e.g., one or more other UEs). In this example, a UE is used as a scheduling entity, and other UEs utilize resources scheduled by the UE for wireless communication. A UE may be used as a scheduling entity in a peer-to-peer (P2P) network and / or a mesh network. In a mesh network example, in addition to communicating with a scheduling entity, UEs may optionally communicate directly with each other.

[0047] Thus, in a wireless communication network having scheduled access to time-frequency resources and having a cellular configuration, a P2P configuration, and a mesh configuration, a scheduling entity and one or more subordinate entities may communicate using the scheduled resources.

[0048] As described above, the RAN may include a CU and a DU. A NR BS (e.g., an eNB, a 5G Node B, a Node B, a transmission reception point (TRP), an access point (AP)) may correspond to one or more BSs. An NR cell may be configured as an access cell (ACell) or a data-only cell (DCell). For example, a RAN (e.g., a central unit or a distributed unit) may configure a cell. A DCell may be a cell used for carrier aggregation or dual connectivity, but not for initial access, cell selection / reselection, or handover. In some cases, a DCell may not send a synchronization signal, and in some cases, a DCell may send an SS. The NR BS may send a downlink signal to the UE, indicating the cell type. Based on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine the NR BS to be considered for cell selection, access, handover, and / or measurement based on the indicated cell type.

[0049] Figure 2 FIG. 1 illustrates an example logical structure of a distributed radio access network (RAN) 200, which may be implemented in a Figure 1 The wireless communication system shown is implemented. The 5G access node 206 may include an access node controller (ANC) 202. The ANC may be a central unit (CU) of the distributed RAN 200. The backhaul interface to the next generation core network (NG-CN) 204 may terminate at the ANC. The backhaul interface to the adjacent next generation access node (NG-AN) may terminate at the ANC. The ANC may include one or more TRPs 208 (which may also be referred to as BS, NR BS, Node B, 5G NB, AP or some other terminology). As described above, TRP may be used interchangeably with "cell".

[0050] The TRP 208 may be a DU. The TRP may be connected to one ANC (ANC 202) or more than one ANC (not shown). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific AND deployments, the TRP may be connected to more than one ANC. The TRP may include one or more antenna ports. The TRP may be configured to serve traffic to the UE individually (e.g., dynamically selected) or jointly (e.g., joint transmission).

[0051] The local architecture 200 can be used to illustrate a "fronthaul" definition. The architecture can define a "fronthaul" solution that supports different deployment types. For example, the architecture can be based on transmit network performance (e.g., bandwidth, latency, and / or jitter).

[0052] The architecture may share features and / or components with LTE. According to various aspects, the next generation AN (NG-AN) 210 may support dual connectivity with NR. The NG-AN may share a common fronthaul for LTE and NR.

[0053] The architecture may enable collaboration between TRPs 208. For example, collaboration may be provisioned within and / or across TRPs via ANC 202. According to various aspects, an inter-TRP interface may not be needed / present.

[0054] According to various aspects, dynamic configuration of split logic functions can be present within architecture 200. Figure 5As described in more detail, the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer can be adaptively located in the DU or CU (e.g., TRP or ANC, respectively). According to certain aspects, the BS may include a central unit (CU) (e.g., ANC 202) and / or one or more distributed units (e.g., one or more TRPs 208).

[0055] Figure 3 An example physical architecture of a distributed RAN 300 is illustrated in accordance with aspects of the present disclosure. A centralized core network unit (C-CU) 302 may host core network functions. The C-CU may be centrally deployed. C-CU functionality may be offloaded (e.g., to Advanced Wireless Services (AWS)) in an effort to handle peak capacity.

[0056] A centralized RAN unit (C-RU) 304 may host one or more ANC functions. Optionally, a C-RU may host core network functions locally. A C-RU may have a distributed deployment. A C-RU may be closer to the network edge.

[0057] The DU 306 may host one or more TRPs (edge ​​node (EN), edge unit (EU), radio head (RH), smart radio head (SRH), etc.) The DU may be located at the edge of the network with radio frequency (RF) functionality.

[0058] Figure 4 The diagrams may be used to implement aspects of the present disclosure. Figure 1 Example components of BS 110 and UE 120 are shown. As described above, the BS may include a TRP. One or more components of BS 110 and UE 120 may be used to practice aspects of the present disclosure. For example, antenna 452, Tx / Rx 222, processor 466, 458, 464 and / or controller / processor 480 of UE 120 and / or antenna 434, processor 460, 420, 438 and / or controller / processor 440 of BS 110 may be used to perform the operations described and referenced herein. Figures 8 to 9 Operation as shown in the figure.

[0059] Figure 4 It shows that it can be Figure 1 1 and 120. For a restricted association scheme, base station 110 may be Figure 11. The macro BS 110c in FIG. 1 may be a macro BS 110c, and the UE 120 may be a UE 120y. The base station 110 may also be some other type of base station. The base station 110 may be equipped with antennas 434a to 434t, and the UE 120 may be equipped with antennas 452a to 452r.

[0060] At the base station 110, the transmit processor 420 may receive data from a data source 412 and control information from a controller / processor 440. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. The processor 420 may process (e.g., encode and symbol map) the data and the control information to obtain data symbols and control symbols, respectively. The processor 420 may also generate reference symbols, such as for PSS, SSS, and cell-specific reference signals. If applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 430 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols, and may provide output symbol streams to modulators (MODs) 432a to 432t. For example, the TX MIMO processor 430 may perform certain aspects described herein for RS multiplexing. Each modulator 432 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 432 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 432a through 432t may be transmitted via antennas 434a through 434t, respectively.

[0061] At UE 120, antennas 452a to 452r can receive downlink signals from base station 110 and can provide received signals to demodulators (DEMOD) 454a to 454r, respectively. Each demodulator 454 can adjust (e.g., filter, amplify, downconvert and digitize) each received signal to obtain input samples. Each demodulator 454 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 456 can obtain received symbols from all demodulators 454a to 454r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. For example, the MIMO detector 456 can provide detected RSs sent using the techniques described herein. A receive processor 458 can process (e.g., demodulate, deinterleave and decode) the detected symbols, provide decoded data for UE 120 to a data sink 460, and provide decoded control information to a controller / processor 480. According to one or more aspects, CoMP aspects may include providing antennas and certain Tx / Rx functionality such that they reside in distributed units. For example, certain Tx / Rx processing may be performed in a central unit while other processing may be performed in distributed units. For example, according to one or more aspects as shown, BS modem 432 may be in a distributed unit.

[0062] On the uplink, at the UE 120, a transmit processor 464 may receive and process data from a data source 462 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 480 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 464 may also generate reference symbols for a reference signal. If applicable, the symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466, further processed by demodulators 454a through 454r (e.g., for SC-FDM, etc.), and transmitted to the base station 110. At the BS 110, uplink signals from the UE 120 may be received by the antenna 434, processed by the modulator 432, detected by the MIMO detector 436 (if applicable), and further processed by the receive processor 438 to obtain decoded data and control information transmitted by the UE 120. Receive processor 438 may provide decoded data to a data sink 439 and decoded control information to controller / processor 440 .

[0063] Controllers / processors 440 and 480 may direct operation at base station 110 and UE 120, respectively. Processor 440 and / or other processors and modules at base station 110 may perform or direct processing, for example, for the techniques described herein. Processor 480 and / or other processors and modules at UE 120 may also perform or direct processing, for example, for Fig. 9 Execution of the illustrated functional modules and / or other processing for the techniques described herein. Memories 442 and 482 may store data and program codes for BS 110 and UE 120, respectively. Scheduler 444 may schedule UEs for data transmission on the downlink and / or uplink.

[0064] Figure 5 The diagram illustrates a diagram 500 of an example for implementing a communication protocol stack according to aspects of the present disclosure. The illustrated communication protocol stack can be implemented by a device operating in a 5G system (e.g., a system supporting uplink-based mobility). Figure 500 illustrates a communication protocol stack including a radio resource control (RRC) layer 510, a packet data convergence protocol (PDCP) layer 515, a radio link control (RLC) layer 520, a media access control (MAC) layer 525, and a physical (PHY) layer 530. In various examples, the layers of the protocol stack can be implemented as separate software modules, parts of a processor or ASIC, parts of non-colocated devices connected by a communication link, or various combinations thereof. Co-located and non-co-located implementations can be used, for example, in the protocol stack of a network access device (e.g., AN, CU, and / or DU) or a UE.

[0065] The first option 505-a shows a split implementation of the protocol stack, where the implementation of the protocol stack is in a centralized network access device (e.g., Figure 2 ANC 202 in ) and distributed network access devices (e.g., Figure 2 In the first option 505-a, the RRC layer 510 and the PDCP layer 515 may be implemented by a central unit, and the RLC layer 520, the MAC layer 525, and the PHY layer 530 may be implemented by the DU. In various examples, the CU and the DU may be collocated or non-collocated. The first option 505-a may be useful in macrocell, microcell, or picocell deployments.

[0066] The second option 505-b shows a unified implementation of the protocol stack, where the protocol stack is implemented in a single network access device (e.g., access node (AN), new radio base station (NR BS), new radio node-B (NR NB), network node (NN), etc.). In the second option, the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530 can each be implemented by the AN. The second option 505-b may be useful in a femtocell deployment.

[0067] Regardless of whether the network access device implements part or all of the protocol stack, the UE may implement the entire protocol stack (eg, the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530).

[0068] Figure 6 600 is a diagram illustrating an example of a DL-centric subframe. The DL-centric subframe may include a control portion 602. The control portion 602 may be present in an initial or beginning portion of the DL-centric subframe. The control portion 602 may include various scheduling information and / or control information corresponding to various portions of the DL-centric subframe. In certain configurations, the control portion 602 may be a physical DL control channel (PDCCH), such as Figure 6 604. The DL-centric subframe may also include a DL data portion 604. The DL data portion 604 may sometimes be referred to as a payload of the DL-centric subframe. The DL data portion 604 may include communication resources for delivering DL data from a scheduling entity (e.g., a UE or a BS) to a subordinate entity (e.g., a UE). In some configurations, the DL data portion 604 may be a physical DL shared channel (PDSCH).

[0069] The DL-centric subframe may also include a common UL portion 606. The common UL portion 606 may sometimes be referred to as a UL burst, a common UL burst, and / or various other appropriate terms. The common UL portion 606 may include feedback information corresponding to various other portions of the DL-centric subframe. For example, the common UL portion 606 may include feedback information corresponding to the control portion 602. Non-limiting examples of the feedback information may include an ACK signal, a NACK signal, a HARQ indicator, and / or various other appropriate types of information. The common UL portion 606 may include additional or alternative information, such as information related to a random access channel (RACH) process, a scheduling request (SR), and various other appropriate types of information. Figure 6As shown, the end of the DL data portion 604 can be separated in time from the beginning of the common UL portion 606. This time interval may sometimes be referred to as a gap, a guard period, a guard interval, and / or various other appropriate terms. The interval provides time for switching from DL communication (e.g., a reception operation performed by a subordinate entity (e.g., a UE)) to UL communication (e.g., a transmission performed by a subordinate entity (e.g., a UE)). Those skilled in the art will appreciate that the foregoing is merely an example of a DL-centric subframe, and that alternative structures with similar features may exist without departing from the aspects described herein.

[0070] Figure 7 700 is a diagram illustrating an example of a UL-centric subframe. The UL-centric subframe may include a control portion 702. The control portion 702 may be present in an initial or beginning portion of the UL-centric subframe. Figure 7 The control portion 702 in may be similar to that described above with reference to Figure 6 The control portion 702 may also include a UL data portion 704. The UL data portion 704 may sometimes be referred to as a payload of a UL-centric subframe. The UL data portion may refer to communication resources used to deliver UL data from a subordinate entity (e.g., a UE) to a scheduling entity (e.g., a UE or a BS). In some configurations, the control portion 702 may be a physical DL control channel (PDCCH).

[0071] like Figure 7 As shown, the end of the control portion 702 can be separated in time from the beginning of the UL data portion 704. This time interval may sometimes be referred to as a gap, a guard period, a guard interval, and / or various other appropriate terms. The interval provides time for switching from DL communication (e.g., a reception operation performed by a scheduling entity) to UL communication (e.g., a transmission performed by a scheduling entity). The UL-centric subframe may also include a common UL portion 706. Figure 7 The common UL portion 706 in may be similar to that described above with reference to Figure 7 The common UL portion 706. The common UL portion 706 may additionally or alternatively include information related to a channel quality indicator (CQI), a sound reference signal (SRS), and various other suitable types of information. Those skilled in the art will appreciate that the foregoing is merely an example of a UL-centric subframe, and that alternative structures with similar features may exist without departing from the aspects described herein.

[0072] In some cases, two or more subordinate entities (e.g., UEs) can communicate with each other using sidelink signals. Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relays, vehicle-to-vehicle (V2V) communications, Internet of Things (IoE) communications, IoT communications, mission-critical grids, and / or various other appropriate applications. Typically, a sidelink signal may refer to a signal that is passed from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., UE or BS), even though the scheduling entity may be used for scheduling and / or control purposes. In some examples, a licensed spectrum (unlike wireless local area networks that typically use unlicensed spectrum) may be used to transmit sidelink signals.

[0073] The UE may operate in various radio resource configurations, including a configuration associated with transmitting a pilot using a dedicated set of resources (e.g., a radio resource control (RRC) dedicated state, etc.) or a configuration associated with transmitting a pilot using a common set of resources (e.g., an RRC common state, etc.). When operating in the RRC dedicated state, the UE may select a dedicated set of resources for sending a pilot signal to the network. When operating in the RRC common state, the UE may select a common set of resources for sending a pilot signal to the network. In either case, the pilot signal sent by the UE may be received by one or more network access devices, such as an AN or DU, or a portion thereof. Each receiving network access device may be configured to receive and measure pilot signals sent on a common set of resources, and also receive and measure pilot signals sent on a dedicated set of resources allocated to a UE for which the network access device is a member of a monitoring set of network access devices for the UE. One or more receiving network access devices or CUs (measurements to which one or more receiving network access devices send pilot signals) may use the measurements to identify a serving cell for the UE, or to initiate a change in a serving cell for one or more UEs.

[0074] Example Reference Power Headroom Report

[0075] In some cases, (e.g., in NR), the UE may not have enough time to calculate the actual PH for a particular carrier / cell based on the DCI received from the BS on various carriers. In one aspect, PHR data including PHRs for multiple carriers is encoded and sent via a single carrier. Typically, the PHRs for all carriers are included in the MAC header of the carrier. Multiple carriers may be scheduled for UL data transmission in a particular timeslot, but the UE may not have enough time to calculate the PH for that timeslot relative to a subset of carriers based on the actual DCI information. In one aspect, the PHR data is encoded with the data scheduled in the timeslot, and therefore, the PHR needs to be well processed before transmission, for example, together with the UL data (e.g., PUSCH) to be sent in the timeslot. The UE may not receive the DCI for each carrier with data scheduled in the timeslot in time to calculate the PHR for transmission in the timeslot. Therefore, the UE sends a reference PHR in the timeslots for those carriers for which the UE did not receive the DCI in time, for processing with other PHRs of other carriers and / or other UL data scheduled in the timeslot.

[0076] Therefore, there may be two scenarios for the UE to send a reference PHR for a specific carrier frequency. The first scenario is when no UL data is scheduled (no allocation DCI) for a specific carrier frequency in a specific timeslot. The second scenario is when the allocation DCI for the carrier frequency comes later than the first DCI after the PHR trigger, but before the timeslot carrying the PHR (but not in time to calculate the PHR based on the DCI).

[0077] In certain aspects, such as in NR, a reference PHR is reported for an activated cell (e.g., a carrier frequency of a cell) whose corresponding DCI is received later than a first DCI after a PHR trigger, scheduling UL data in the same timeslot as the first DCI. In one aspect, the PHR trigger is a periodic trigger defined by the network. Additionally or alternatively, the PHR is triggered when the path loss of one or more carrier frequencies changes (e.g., decreases) by more than a defined limit. In one aspect, the UE, in response to the PHR trigger, sends a PHR (e.g., an actual or reference PHR) for each configured carrier frequency at a specific TTI and on one of the carrier frequencies, the TTI scheduled by the first DCI for the UL being received on the carrier frequency after the trigger.

[0078] Figure 8 Illustrated is timing 800 for transmission of power headroom reports by a UE, in accordance with certain aspects of the present disclosure.

[0079] exist Figure 8802, PDCCH 1 and 2 and corresponding PUSCH 1 and 2 are associated with different carrier frequencies, e.g., carrier frequencies 1 and 2, respectively. PDCCH 1 is the first PDCCH received for carrier 1 after a PHR trigger. PDCCH 1 includes DCI 1 (not shown) that schedules UL data (e.g., PUSCH 1) in a TTI 802 (e.g., a time slot). PDCCH 2 for carrier 2 is received after PDCCH 1 in time and includes DCI 2 (not shown) that schedules UL data (PUSCH 2) with a smaller scheduling delay in a portion of the same TTI 802, the same TTI 802 having the same start time as scheduled by DCI 1. As shown, DCI 2 schedules UL data for a smaller duration, e.g., due to a larger subcarrier spacing.

[0080] In one aspect, the UE, based on DCI 1, decides to send the actual PHR for carrier 1 in TTI 802. The UE starts forming the PHR immediately after decoding PDCCH 1. However, the UE does not have DCI 2 for carrier 2 at this time, and therefore, decides to also send a reference PHR for carrier 2 in the same time slot along with the PHR for carrier 1. Furthermore, because PDCCH 2 carrying DCI 2 is received later in time, the UE may not have enough time to form a PHR based on DCI 2 for processing (coding, multiplexing, etc.) and transmission in TTI 802 along with the PHR for carrier 1, e.g., as a jointly coded PHR. In one aspect, in order to be able to jointly process (e.g., code, multiplex, modulate, etc.) the PHRs of both carriers for transmission in TTI 802, the UE needs to have the DCI for each carrier when forming the PHR. Since the UE has not yet received and decoded DCI 2 when forming the PHR for carrier 1 , it calculates the reference PHR for carrier 2 for joint processing with the actual PHR for carrier 1 .

[0081] In one aspect, there may be no UL data scheduled for carrier 2 in TTI 802 that is consistent with the UL scheduling on carrier 1 .

[0082] In any case, when the UE starts forming the PHR for carrier 1, it does not have the DCI for carrier 2, and therefore calculates the normal PHR for carrier 1 based on DCI1 and calculates the reference PHR for carrier 2, and sends (e.g., on carrier 1) the PHR and the reference PHR (e.g., within TTI 802 and jointly encoded as part of the PUCCH).

[0083] In certain aspects, a UE may be configured with more than two carriers, and the UE may decide to report the actual PHR of carrier 1 (based on DCI 1) and the reference PHR of each other carrier (e.g., active cell) in the same timeslot on carrier 1, where the UE does not have DCI for carrier 1 when calculating the PHR of carrier 1. In one aspect, if the UE receives and decodes DCI 3 (not shown) of another carrier 3 before the PHR trigger, and DCI 3 schedules PUSCH 3 in the same TTI 802 (e.g., timeslot) as scheduled by DCI 1 and 2, the UE uses DCI 3 to calculate the actual PHR of carrier 3 for transmission (on carrier 1) along with the actual PHR of carrier 1 and the reference PHR of carrier 2.

[0084] Therefore, the UE reports the actual PHR of the carrier / cell for which the UE has decoded the DCI for scheduling UL data in a specific time slot (when calculating the PHR), and reports the reference PHR of the carrier / cell for which the UE receives DCI later or does not receive DCI at all for scheduling UL data in a specific time slot.

[0085] In certain aspects, such as in NR, for each carrier frequency of each cell, the UE can maintain two power control (PC) processes / cycles simultaneously. For example, if each cell has one carrier frequency and 10 cells are configured, there may be 20 configured PC processes. On the one hand, the UE must decide which PC process the PHR must be reported to. In addition, multiple reference signals may be provided to the UE, and the UE needs to maintain channel path loss measurements associated with multiple reference signals. On the one hand, for one PC process at a given time, only one reference signal is used for measurement. The reference signal is used by the UE to measure the channel and derive the path loss (e.g., for power control equations). On the one hand, the UE can switch frequency bands, and the reference signal used to measure the path loss can change with each switch.

[0086] In some aspects, the NR reference PHR needs to be designed so that it provides the maximum amount of useful information to the network. The network can use the reference PHR to derive useful information including path loss information.

[0087] In certain aspects, the reference PH for a particular carrier frequency of a cell is calculated with certain predefined parameters known to the network and the UE (eg, not based on actual DCI) so that the network can obtain information including information about the path loss associated with the carrier frequency.

[0088] In one aspect, such as in NR, a Type 1 PH for a PUSCH transmission opportunity (i) for a particular carrier frequency (e.g., UL frequency) (f) of a given cell (c) may be defined as,

[0089] PH type1,f,c (i,j,q d ,l)=P CMAX,f,c (i)–{P o_PUSCH,f,c (j)+α f,c (j).PL f,c (q d )+

[0090] Δ TF,f,c (i)+f f,c (i,l)

[0091] in,

[0092] PH type1,f,c is the reference PH of the carrier frequency (f) of a given cell (c);

[0093] P CMAX,f,c is the maximum UE transmission power of frequency f in cell c;

[0094] P o_PUSCH,f,c is the target received power for PUSCH on frequency f in cell c;

[0095] α f,c is the path loss PL f,c The scaling factor of

[0096] PL f,c is the path loss of frequency f in cell c;

[0097] Δ TF,f,c is a parameter related to the coding rate and is selected based on the coding rate used for PUSCH;

[0098] f f,c is the power adjustment parameter used for closed-loop power control and is the accumulated value of the power control commands sent in the DCI;

[0099] i refers to the index of the transmission period and corresponds to the time slot in which the PUCCH / PHR transmission occurs (e.g., Figure 8 , i may refer to a time slot corresponding to TTI 802);

[0100] j is the index of Po as the target received signal power, and α is the scaling factor of the path loss PL (in one aspect, there may be multiple beams configured on the UL, and each beam may have a different target received signal power depending on j (e.g., due to different interference for each beam));

[0101] q d is the index of the reference signal (UE derives the path loss PL based on the reference signal. dAn index indicating the reference signal used. There may be more than one reference signal configured for the UE. The index indicates which configured reference signal is used); and

[0102] l is the index of the power control process / cycle (as mentioned above, up to 2 closed-loop PC processes can be defined per cell per carrier frequency).

[0103] Certain aspects of the present disclosure discuss methods for determining l, j, and q for reference pH calculations. d , so that the network can best estimate the path loss information of a specific carrier frequency based on the reported PH.

[0104] Fig. 9 Illustrated are example operations 900 for generating and reporting a reference PHR by a UE, in accordance with certain aspects of the present disclosure.

[0105] Operations 900 begin at 902 by deciding to report a reference power headroom (PH) of at least one carrier frequency in a transmission time interval (TTI). At 904, the UE determines a target received power and path loss proportionality factor index (j) of a physical uplink shared channel (PUSCH) to be transmitted in the TTI, an index (q) of a reference signal for measuring the path loss of the carrier frequency, and d ) or at least one of the index (l) of the power control process for the carrier frequency. At 906, the UE calculates a reference PH based on one or more of the determined at least one index. At 908, the UE reports a power headroom report (PHR) including the PH of the carrier frequency in a TTI.

[0106] In some way, for a given l, there are usually associated j and q at a given time d .

[0107] In a first technique, the index l of the power control process / cycle may be fixed, for example, l=1 or 2 (eg, in the specification or via RRC configuration), and q d and j are valid parameters associated with a fixed l. On the one hand, for a given PC process (l), at a given time there will be a q d For example, once the UE determines l for a particular time slot I (e.g., based on the specification or RRC configuration), it knows the valid q associated with l. dand j. In one aspect, the network determines the PC process configuration and sets the value of l and signals it to the UE. For example, if the network deems a particular power control process (e.g., l=1) to be more important, the network may set the PC process value for grant-based transmissions (e.g., l=1), which are the types of transmissions that the network expects to receive more consistently. The UE reports a reference PHR based on a fixed PC process.

[0108] In the second technique, the UE may use the l, q corresponding to the most recently scheduled PUSCH of the carrier frequency before the PHR trigger. d The UE determines the value of l corresponding to the most recently scheduled PUSCH before the PHR trigger and the corresponding value of q d The benefit of this technique is that the network will get more information about a specific power control process because reports based on that PC process can be more frequent. A negative effect may be that if the UE fails to decode a specific DCI, it will send a reference PHR based on an older DCI for a different PC process.

[0109] In a third technique, the network defines a slot pattern and configures a specific l for the slot pattern. A UE that reports a reference PHR in a slot that is part of the slot pattern uses the value of l configured for the pattern. For example, the network may define and / or configure (e.g., via RRC configuration) a set of slots A (e.g., all odd-numbered slots). In one aspect, for calculating a PHR in a slot belonging to set A (e.g., i = the index of a slot belonging to set A), l = 1, and q d and j are valid parameters associated with l=1; for the remaining time slots (e.g., even time slots), l=2 and q d and j are valid parameters associated with l=2.

[0110] In a fourth technique, the index l of the power control process / cycle may be fixed, e.g., l=1 or 2 (e.g., in the specification or via RRC configuration), and j is a configured parameter associated with l. d (and associated j, if for different q d The configuration is different j) is a function of the time slot index.

[0111] In one aspect, one of the control processes / cycles may be more important from the network point of view. For example, l=1 may be configured for grant-based UL transmissions. However, the network may want to know path loss information associated with different frequency bands. Although there may be only one frequency band associated with the power control cycle, there may be multiple antenna beams configured for the UE in a power control configuration that uses one reference per beam. In this case, j is a function of l, and q dis a function of the time slot index (i). For example, for four beams, the network can define four different time slot sets, and a different reference signal can be used for each time slot set. By doing this, the network can get information about the path loss of different beams.

[0112] In one aspect, if the values ​​α and Po are fixed, then the j index is not needed. That is, if the values ​​of α and Po are fixed, then j is also a fixed value. For example, in each of the above techniques, the PHR can be defined by fixing α to a known value (e.g., 1) and setting Po_PUSCH = Po-nominal-pusch-withgrant, a cell-specific value, or any other predefined reasonable value. In one aspect, this removes the dependency of j.

[0113] In certain aspects, one or more of the above techniques may be defined by the network, and the network may configure the UE (eg, via RRC signaling) which technique to apply.

[0114] Fig.10 The diagrams may include configurations to perform operations for the techniques disclosed herein, such as Fig. 9 1000. The communication device 1000 includes a processing system 1002 coupled to a transceiver 1008. The transceiver 1008 is configured to transmit and receive signals for the communication device 1000, such as the various signals described herein, via an antenna 1010. The processing system 1002 may be configured to perform processing functions for the communication device 1000, including processing signals received by the communication device 1000 and / or to be transmitted by the communication device 1000.

[0115] The processing system 1002 includes a processor 1004 coupled to a computer readable medium / memory 1012 via a bus 1006. In some aspects, the computer readable medium / memory 1012 is configured to store instructions that, when executed by the processor 1004, cause the processor 1004 to perform the following operations: Fig. 9 The operations shown, or other operations for performing the various techniques discussed herein.

[0116] In some aspects, the processing system 1002 further includes a system for performing Fig. 9 The processing system 1002 includes a decision component 1014 for performing the decision operation shown. Fig. 9 In addition, the processing system 1002 includes a component for performing the following operations: Fig. 9 In addition, the processing system 1002 includes a computing component 1018 for performing the computing operations shown. Fig. 9The reporting component 1020 of the reporting operation is shown. The decision component 1014, the determination component 1016, the calculation component 1018, and the reporting component 1020 can be coupled to the processor 1004 via the bus 1006. In some aspects, the decision component 1014, the determination component 1016, the calculation component 1018, and the reporting component 1020 can be hardware circuits. In some aspects, the decision component 1014, the determination component 1016, the calculation component 1018, and the reporting component 1020 can be software components that are executed and run on the processor 1004.

[0117] The methods disclosed herein include one or more steps or actions for implementing the described methods. The method steps and / or actions may be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions may be modified without departing from the scope of the claims.

[0118] In addition, the term "or" is intended to refer to an inclusive "or" rather than an exclusive "or". That is, unless an exception is specified or it is clear from the context, for example, the phrase "X employs A or B" is intended to refer to any natural inclusive arrangement. That is, for example, the phrase "X employs A or B" is satisfied by any of the following instances: X employs A; X employs B; or X employs both A and B. As used herein, reference to elements in the singular is not intended to mean "one and only one", unless specifically stated as such, otherwise it means "one or more". For example, the articles "one" and "an" as used in this application and the appended claims will generally be interpreted to mean "one or more" unless an exception is specified or it is clear from the context that a singular form is involved. Unless specifically stated as an exception, the term "some" means one or more. A phrase referring to "at least one" of a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, and any combination having multiple of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc or any other ordering of a, b, and c). As used herein, the term "and / or" included in the claims, when used in a list of two or more items, means that any one of the listed items can be used alone, or any combination of two or more of the listed items can be used. For example, if a combination is described as including components A, B, and / or C, the combination can include A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

[0119] As used herein, the term "determine" includes a variety of actions. For example, "determine" may include calculating, solving, processing, deriving, studying, searching (e.g., searching in a table, a database, or another data structure), determining, etc. In addition, "determine" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), etc. In addition, "determine" may include parsing, selecting, choosing, establishing, etc.

[0120] 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 apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but should be given a full scope consistent with the claim language. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or will become known to those skilled in the art are expressly included herein by reference and are intended to be included by the claims. In addition, whether or not the content disclosed herein is explicitly described in the claims, it is not intended to be disclosed to the public.

[0121] The various operations of the method as described above can be performed by any suitable device capable of performing the corresponding functions. The device may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs) or processors. Typically, in the case of illustrated operations in the figure, those operations may have corresponding paired devices plus functional components with similar numbers.

[0122] For example, the means for sending and / or the means for receiving may include one or more of the transmit processor 420, the TX MIMO processor 430, the receive processor 438, or the antenna 434 of the base station 110 and / or the transmit processor 464, the TX MIMO processor 466, the receive processor 458, or the antenna 452 of the user equipment 120. In addition, the means for obtaining, the means for specifying, the means for aggregating, the means for collecting, the means for selecting, the means for switching, and the means for detecting may include one or more processors, such as the controller / processor 480, the transmit processor 464, the receive processor 458, and / or the MIMO processor 466 of the user equipment 120.

[0123] The various illustrative logical blocks, modules, and circuits described with respect to the present disclosure may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but alternatively, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0124] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented in a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the user terminal 120 (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and will not be described further. The processor may be implemented as one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits that can execute software. Those skilled in the art will recognize that how best to implement the described functionality of the processing system depends on the specific application and the overall design constraints imposed on the entire system.

[0125] If implemented in software, the function can be stored or sent via one or more instructions or codes on a computer-readable medium. Software should be broadly interpreted as meaning instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transmission of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including the execution of software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium may be integrated into the processor. For example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively, or in addition, a machine-readable medium or any part thereof may be integrated into a processor, such as a cache and / or a general register file. Examples of machine-readable storage media may include, for example, RAM (random access memory), flash memory, phase change memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied as a computer program product.

[0126] A software module may include a single instruction, or many instructions, and may be distributed in several different code segments, distributed among different programs, and distributed across multiple storage media. A computer-readable medium may include multiple software modules. A software module includes instructions that cause a processing system to perform various functions when executed by a device such as a processor. A software module may include a transmitting module and a receiving module. Each software module may be located in a single storage device or distributed across multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard drive into a RAM. During the execution of a software module, a processor may load certain instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by a processor. When the functionality of a software module is referred to below, it will be understood that this functionality is implemented by the processor when executing instructions from the software module.

[0127] Additionally, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. As used herein, disk and magnetic disk include compact disk (CD), laser disk, optical disk, digital versatile disk (DVD), floppy disk, and Blu-ray disk Wherein magnetic disks generally reproduce data magnetically, while disks reproduce data optically with lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0128] Thus, some aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded) thereon, which may be executed by one or more processors to perform the operations described herein.

[0129] In addition, it should be recognized that the module and / or other appropriate devices for executing the methods and techniques described here can be downloaded and / or otherwise obtained by the user terminal and / or base station as applicable. For example, such a device can be coupled to a server to facilitate the transmission of the device for executing the methods described here. Alternatively, the various methods described here can be provided via a storage device (e.g., RAM, ROM, physical storage media such as optical disks (CDs) or floppy disks, etc.) so that the user terminal and / or base station can obtain the various methods when the storage device is coupled or provided to the device. In addition, any other appropriate technology for providing the methods and techniques described here to the device can be used.

[0130] It is to be understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment UE, comprising: Deciding to report a reference power headroom PH of at least one carrier frequency in a transmission time interval TTI; Determine the target received power P of the physical uplink shared channel PUSCH to be transmitted in the TTI o and the index j of the path loss proportionality factor α, the index q of the reference signal used to measure the path loss of the carrier frequency d and an index l for the power control process of the carrier frequency, wherein the determination includes determining a fixed value based on a path loss proportionality factor α and a target received power P o The fixed value of index j is determined by the fixed value of calculating the reference PH based on one or more of the determined indices; and A power headroom report (PHR) including the reference PH of the carrier frequency is reported in the TTI.

2. The method of claim 1, wherein the fixed value of the path loss proportionality factor α comprises 1, and wherein the target received power P o The fixed value of comprises a nominal value received via radio resource control RRC signaling.

3. The method of claim 1, wherein: The determination also includes: Selecting an index l configured for the UE; and Select valid index j and valid index q d , both of which are associated with the selected index l.

4. The method of claim 3, further comprising receiving an indication of an index l configured for the UE.

5. The method of claim 1, wherein: The determination also includes: Select the index l, j and q of the PUSCH scheduled most recently for the carrier frequency before detecting a trigger for reporting the PHR d .

6. The method of claim 1, wherein: The determination also includes: determining whether the index of the TTI is part of a set of indices associated with a TTI mode, wherein the UE is configured with at least one TTI mode; and selecting an index l configured for the determined TTI mode; and Select valid index j and valid index q d , both of which are associated with the selected index l.

7. The method of claim 6, wherein: The UE is configured with at least two TTI modes, wherein each of the at least two TTI modes has a different configuration value of index l.

8. The method of claim 1, wherein: The determination also includes: Selecting an index l configured for the UE; and selecting the index j associated with the selected index l; and The index q is chosen as a function of the index of the TTI d .

9. The method of claim 7, wherein: The UE is configured with multiple TTI index sets, where each set is configured with an index q d different values ​​of , and Among them, select index q d include: determining that the index of the TTI is part of one of the sets of TTI indices; and Select an index q configured for the determined TTI index set d The value of .

10. The method of claim 1, further comprising receiving a signal for determining index l, index j, or index q. d An indication of at least one of the techniques.

11. A device for a user equipment UE to perform wireless communication, comprising: at least one processor configured to cause the UE to: Deciding to report a reference power headroom PH of at least one carrier frequency in a transmission time interval TTI; Determine the target received power P of the physical uplink shared channel PUSCH to be transmitted in the TTI o and the index j of the path loss proportionality factor α, the index q of the reference signal used to measure the path loss of the carrier frequency d and an index l for the power control process of the carrier frequency, wherein the at least one processor is configured to calculate the power of the carrier frequency based on a fixed value of the path loss proportionality factor α and a target received power P o The fixed value of index j is determined by the fixed value of calculating the reference PH based on one or more of the determined indices; and reporting a power headroom report (PHR) of the reference PH including the carrier frequency in the TTI; and A memory is coupled to the at least one processor.

12. The apparatus of claim 11, wherein the fixed value of the path loss proportionality factor α comprises 1, and wherein the at least one processor is configured to determine the target received power P based on a nominal value received via radio resource control (RRC) signaling. o fixed value.

13. The device of claim 11, wherein the at least one processor is further configured to cause the UE to receive a command for determining index l, index j, or index q. d An indication of at least one of the techniques.

14. The device of claim 11, wherein: The at least one processor is further configured to: Selecting an index l configured for the UE; and Select valid index j and valid index q d , both of which are associated with the selected index l.

15. The apparatus of claim 11, wherein: The at least one processor is further configured to: Select the index l, j and q of the PUSCH scheduled most recently for the carrier frequency before detecting a trigger for reporting the PHR d .

16. The apparatus of claim 11, wherein: The at least one processor is further configured to: determining whether the index of the TTI is part of a set of indices associated with a TTI mode, wherein the UE is configured with at least one TTI mode; and selecting an index l configured for the determined TTI mode; and Select valid index j and valid index q d , both of which are associated with the selected index l.

17. The apparatus of claim 11, wherein: The at least one processor is further configured to: Selecting an index l configured for the UE; and selecting the index j associated with the selected index l; and The index q is chosen as a function of the index of the TTI d .

18. A device for a user equipment UE to perform wireless communication, comprising: means for determining a reference power headroom PH for reporting at least one carrier frequency in a transmission time interval TTI; The target received power P of the physical uplink shared channel PUSCH to be transmitted in the TTI is used to determine the target received power P of the physical uplink shared channel PUSCH to be transmitted in the TTI o and the index j of the path loss proportionality factor α, the index q of the reference signal used to measure the path loss of the carrier frequency d and means for determining an index l of a power control process of the carrier frequency, wherein the means for determining is configured to be based on a fixed value of a path loss proportionality factor α and a target received power P o The fixed value of index j is determined by the fixed value of means for calculating said reference PH based on one or more of the determined indices; and means for reporting a power headroom report (PHR) including the reference PH of the carrier frequency in the TTI.

19. The apparatus of claim 18, wherein the fixed value of the path loss proportionality factor α comprises 1, and wherein the target received power P o The fixed value of comprises a nominal value received via radio resource control RRC signaling.

20. The apparatus of claim 18, further comprising a method for receiving a method for determining index l, index j or index q d At least one of the components of the invention is indicated in the art.

21. A computer-readable medium for a user equipment (UE) to perform wireless communication, wherein the computer-readable medium stores instructions for executing the method according to any one of claims 1 to 11 when the instructions are processed by at least one processor.

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