Downlink power allocation for NBIOT

Abstract

A method and apparatus for downlink power allocation for NBIoT are disclosed. A method includes receiving a first reference signal (NRS), first data, and second data, wherein the first reference signal is associated with a first transmission power (E_NRS); the first data is located in a symbol without the first reference signal, and the first data is associated with a second transmission power (E_A); and the second data is located in a symbol in which the first reference signal is received; and the second data is associated with a third transmission power (E_B).

Description

Technical Field

[0001] The subject matter disclosed herein relates generally to wireless communications, and more particularly to downlink power allocation for NBIOT. Background Art

[0002] The following abbreviations are defined herein, at least some of which are referred to in the following description: 3rd Generation Partnership Project (3GPP), European Telecommunications Standards Institute (ETSI), Frequency Division Duplex (FDD), Frequency Division Multiple Access (FDMA), Long Term Evolution (LTE), New Radio (NR), Very Large Scale Integration (VLSI), Random Access Memory (RAM), Read Only Memory (ROM), Erasable Programmable Read Only Memory (EPROM or Flash), Compact Disc Read Only Memory (CD-ROM), Local Area Network (LAN), Wide Area Network (WAN), Personal Digital Assistant (PDA), User Equipment (UE), Uplink (UL), Evolved Node B (eNB), Next Generation Node B (gNB), Downlink (DL), Central Processing Unit (CPU), Graphics Processing Unit (GPU), Field Programmable Gate Array (FPGA), Dynamic RAM (DRAM), Synchronous Dynamic RAM (SDRAM), Static RAM (SRAM), Liquid Crystal Display (LCD), Light Emitting Diode (LED), Organic LED (OLED), Orthogonal Frequency Division Multiplexing (OFDM), Radio Resource Control (RRC), Reference Signal (RS), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Duplex (TDD), Time Division Multiplexing (TDM), User Entity / Equipment (Mobile Terminal) (UE), Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), Internet of Things (IoT), Narrowband Internet of Things (NB-IoT or NBIoT), Long Term Evolution (LTE), Narrowband Internet of Things (NB), Physical Downlink Shared Channel (PDSCH), Narrowband Physical Downlink Shared Channel (NPDSCH), Physical Resource Block (PRB), Universal Mobile Telecommunications System (UMTS), Evolved UMTS Terrestrial Radio Access (E-UTRA or EUTRA), Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), Cyclic Prefix (CP), Resource Element (RE), Cell Reference Signal (CRS), Energy Per Resource Element (EPRE), Multi-User Multiple Input Multiple Output (MU MIMO), Automatic Gain Control (AGC), Narrowband Reference Signal (NRS).

[0003] As background, downlink (DL) power allocation for LTE is described.

[0004] There are two types of OFDM symbols used for LTE downlink power allocation. In the following description, OFDM symbols are abbreviated as symbols for simplicity. Under normal CP (cyclic prefix) conditions, one slot has 7 symbols; and under extended CP conditions, one slot has 6 symbols.

[0005] Figure 1 The figure shows a physical resource block (PRB) in a normal CP under the condition of one antenna port (for example, antenna port 0). A physical resource block (PRB) consists of 12 subcarriers in the frequency domain and one time slot (7 symbols) in the time domain. A resource element (RE) refers to one symbol in the time domain and one subcarrier in the frequency domain. Figure 1 As shown, a physical resource block (PRB) consists of 84 (=12*7) resource elements (REs), each of which is Figure 1 Indicated as a block. Figure 1 In the illustrated PRB, CRS (Cell Reference Signal) exists in symbols 0 and 4 in the time domain and in every six subcarriers in the frequency domain. Figure 1 , the CRS for antenna port 0 exists in the following REs: (symbol 0, subcarrier 0), (symbol 0, subcarrier 6), (symbol 4, subcarrier 3) and (symbol 4, subcarrier 9).

[0006] The symbols in one slot are divided into two types (Type A symbols and Type B symbols) depending on the presence or absence of CRS REs in the symbol. Figure 1 If all REs (indicated as R0 in the figure) are PDSCH REs, the symbol belongs to type A symbols. For the case where the number of CRS antenna ports is 1 or 2, Figure 1 Symbols 1, 2, 3, 5, and 6 of the PRBs in the symbol belong to type A symbols. On the other hand, if the RE in the symbol contains a CRS RE, the symbol belongs to type B symbol. For the case where the number of CRS antenna ports is 1 or 2, Figure 1 Symbols 0 and 4 of the PRB in belong to type B symbols.

[0007] The EPRE (Energy per Resource Element) of CRS RE (i.e., CRS EPRE, abbreviated as E_RS) is constant across the downlink system bandwidth and is configured by a higher layer parameter referenceSignalPower. CRS EPRE (E_RS) is cell-specific. The ratio of PDSCH EPRE to cell-specific CRS EPRE among PDSCH REs (not applicable to PDSCH REs with zero EPRE) for each OFDM symbol (e.g., including type A symbols and type B symbols) is given by ρ according to the OFDM symbol index as given in Table 1 below A or B express.

[0008] Table 1: The ratio of PDSCH EPRE to cell-specific RS EPRE is represented by ρ A or B Indicates the OFDM symbol index within the time slot of the non-MBSFN subframe

[0009]

[0010] A detailed description is given. Each type A symbol consists of only PDSCH REs (e.g. Figure 1 In the example, each type A symbol consists of 12 PDSCH REs in one PRB). The EPRE (E_A) of each PDSCH RE in a type A symbol is derived from the CRSEPRE (E_RS). In particular, the ratio of E_A to E_RS is given by ρ A = E_A / E_RS. Each type B symbol includes PDSCH RE and CRS RE (e.g. Figure 1 In the case where the number of CRS antenna ports is 1, each type-B symbol consists of 10 PDSCH REs and 2 CRS REs in one PRB). The EPRE (E_B) of each PDSCH RE in a type-B symbol is derived from E_RS. In particular, the ratio of E_B to E_RS is given by ρ B =E_B / E_RS.

[0011] In addition to 4TX diversity and MU MIMO, UE-specific ρ A Determined by PA, and in particular, PA[dB]=10lgρ A The PA is UE-specifically configured by a higher layer parameter pa from the set {-6, -4.77, -3, -1.77, 0, 1, 2, 3} [dB]. Therefore, ρ A is a number selected from the set {1 / 4, 1 / 3, 1 / 2, 2 / 3, 1, 1.2589, 1.5849, 2}.

[0012] ρ B Determined by PB. In particular, ρ B / ρ A Determined by the value of PB. PB is the PDSCH EPRE power index and is cell-specifically configured by a higher layer parameter pb from the set {0, 1, 2, 3}. Figure 2 The cell-specific ratio ρ for 1, 2 or 4 cell antenna ports is shown. B / ρ A The cell-specific ratio indicates the value of ρ for different values ​​of PB. B / ρ A Under the condition of "one antenna port" and under the condition of "two or four antenna ports", ρ B / ρ A The value of is different for the same value of PB.

[0013] In summary, the eNB can configure the downlink power allocation using the following three parameters: referenceSignalPower, PA and PB.

[0014] Take a PRB PDSCH transmission as an example. S_A represents the total power of a type A symbol composed of 12 PDSCH REs, that is, S_A = 12*E_A. S_B represents the total power of a type B symbol. For example, Figure 1 In the example of , when the type B symbol includes 2 CRS REs and 10 PDSCH REs, S_B = 2*E_RS + 10*E_B. The power efficiency of a PRB or each allocated UE is defined as min(S_A, S_B) / max(S_A, S_B). Since the parameter referenceSignalPower only indicates a reference of the power, the power efficiency is determined by the configuration of the PA and PB.

[0015] exist Figures 3A-3E Some examples of power efficiency in different configurations of PA and PB are shown in FIG.

[0016] Figure 3A is an example of downlink power allocation for one antenna port (eg, antenna port 0), where PA=-3dB and PB=0, and E_RS is configured as 10dBm. It can be derived that S_A=60dBm and S_B=70dBm. Therefore, the power efficiency is 60 / 70=0.86.

[0017] Figure 3Bis an example of downlink power allocation for one antenna port (eg, antenna port 0), where PA=-3dB and PB=1, and E_RS is configured as 10dBm. It can be derived that S_A=60dBm and S_B=60dBm. Therefore, the power efficiency is 60 / 60=1.

[0018] Figure 3C is an example of downlink power allocation for one antenna port (eg, antenna port 0), where PA=-3dB and PB=2, and E_RS is configured as 10dBm. It can be derived that S_A=60dBm and S_B=50dBm. Therefore, the power efficiency is 50 / 60=0.83.

[0019] Figure 3D is an example of downlink power allocation for one antenna port (e.g., antenna port 0) of two antenna ports (e.g., antenna ports 0 and 1), where PA=-3dB and PB=1, and E_RS is configured as 10dBm. It can be seen that each of the type B symbols (symbols 0 and 4) includes not only 8 PDSCH REs and 2 CRS REs, but also 2 REs with zero transmission power. The REs with zero transmission power are CRSs for the other antenna port (e.g., antenna port 1). In Figure 3D , S_A=60dBm and S_B=60dBm. Therefore, the power efficiency is 60 / 60=1.

[0020] Figure 3E : is an example of downlink power allocation for 1 antenna port (e.g., antenna port 2) of 4 antenna ports (e.g., antenna ports 0, 1, 2, 3), where PA=-3dB and PB=1, and E_RS is configured as 10dBm. It can be seen that symbols 0, 1, and 4 are type B symbols. Each of symbols 0 and 4 includes 4 REs with zero transmission power, while symbol 1 includes 2 REs with zero transmission power. The REs with zero transmission power are CRSs for other antenna ports (e.g., antenna ports 0, 1, 3). In Figure 3E , S_A = 60 dBm and S_B = 40 or 60 dBm. Therefore, the power efficiency is 40 / 60 = 0.67.

[0021] There are many factors that need to be considered when the eNB configures the PA and PB, such as the total power for each OFDM, EPRE, RS power boost for aggregation, power saving, interference. For example, the eNB can reduce the load for some PRBs (which means that only "CRS" REs are sent and no PDSCH REs are sent in those PRBs) or the CRS power can be increased to adjust the configuration of the PA and PB. When the two types of symbols have different powers (i.e., S_A≠S_B), the eNB will intercept the higher power symbol or use lower power. Under this condition, the UE will adjust the AGC (Automatic Gain Control) based on the peak power or average power or the minimum power, which will degrade the detection performance. In any case, the UE is expected to receive almost the same power for each symbol.

[0022] In fact, only some of the configurations of PA and PB may result in the same power for both types of symbols, which achieves the highest power efficiency (100%). Examples of such configurations of PA and PB may be as follows: (PA [dB], PB) = (0, 0), (-3, 1), (-4.77, 2), (-6, 3). From the operator (eNB) point of view, most configurations of PA and PB combinations, such as (PA [dB], PB) = (3, 3), (2, 3), (-6, 0), will not be configured due to low power consumption efficiency.

[0023] As described above, in LTE, since CRS REs exist in type B symbols, the eNB can configure the EPRE (E_A) of each PDSCH RE in type A symbols and the EPRE (E_B) of each PDSCH RE in type B symbols by configuring PA and PB to achieve downlink power allocation.

[0024] In the case of NBIoT, the downlink power allocation is different.

[0025] In NBIoT (in-band deployment or standalone deployment or guard band deployment), the downlink RE can be NPDSCH RE or NRS (narrowband reference signal) RE. In the case of in-band deployment, the downlink RE can alternatively be CRS RE.

[0026] The UE can assume that the EPRE of NRS RE (NRS EPRE) is constant across the downlink NBIoT system bandwidth and across all subcarriers containing NRS.

[0027] The UE may assume that the ratio of NPDSCH EPRE to NRS EPRE among NPDSCH REs (not applicable to NPDSCH REs with zero EPRE) is 0dB for a NBIoT cell with one NRS antenna port and -3dB for a NBIoT cell with two NRS antenna ports.

[0028] If the higher layer parameter operationModeInfo indicates '00' or samePCI-indicator indicates 'samePCI' for the cell, and if the parameter nrs-CRS-PowerOffset is provided by higher layers, the ratio of NRS EPRE to CRS EPRE is given by the parameter nrs-CRS-PowerOffset.

[0029] It can be seen that each type of RE (NRS RE, NPDSCH RE, CRS RE) is associated with a specific EPRE (NRS EPRE, NPDSCH EPRE, CRS EPRE), which means that the eNB sends each type of RE at the power indicated by each specific EPRE, and the UE assumes the same. In Release 13 NBIoT, the actual EPRE (e.g. NPDSCH EPRE) of NBIoT in addition to the NRS EPRE depends on the eNB implementation. In Release 13 NBIoT, only QPSK is supported (i.e., 16QAM is not supported). The UE does not need to know the exact value of the power (ERPE) to perform demodulation. Therefore, as long as the NRS power is constant, the eNB can send NPDSCH at any power.

[0030] Although any EPRE for NBIoT PDSCH is detectable (can be demodulated), the UE is expected to receive almost the same power for each PRB to adjust the AGC.

[0031] In Release 17 NBIoT, 16QAM will be supported. Therefore, in order to correctly perform demodulation, the UE needs to know the transmission power (EPRE) of the NPDSCH. The purpose of the present invention is to propose a method and apparatus for NBIoT downlink power allocation, especially when 16QAM is supported in Release 17 NBIoT.

[0032] It may be straightforward to use LTE downlink power allocation as a baseline for NBIoT downlink power allocation in Release 17 NBIoT. However, it is not possible to use LTE downlink power allocation directly due to at least the following differences between LTE and NBIoT.

[0033] First, as mentioned above, for NBIoT in-band deployment, downlink RE can be of three types: PDSCH RE or NRS RE or CRS RE. Therefore, there are three types of OFDM symbols (e.g., OFDM symbols with NRS, OFDM symbols with CRS, and OFDM symbols without NRS or CRS). Therefore, it is inappropriate to define only two types of symbols as in LTE downlink power allocation.

[0034] Secondly, the UE of the LTE system receives downlink signals with a bandwidth of 20MHz and can determine the PDSCH bandwidth through eNB scheduling. However, the UE of NBIoT receives downlink signals with a bandwidth of 1 PRB and the PDSCH bandwidth is fixed to 1 PRB at least for in-band deployment.

[0035] For example, Figure 4 As shown, the eNB schedules 1 PRB for PDSCH transmission at PA=-3dB and PB=3 (1 antenna port, and E_RS is configured to 10dBm). If the LTE UE has a receiving bandwidth of 2 PRBs (scheduled by the eNB), the power of the symbol is the same across the 2 PRBs. That is, although the power is different per symbol per PRB (in the first PRB, S_A=60dBm but S_B=40dBm), the power is the same per symbol per 2 PRBs (S_A=S_B=60dBm), which can be achieved by appropriate eNB scheduling (for example, by unloading the second PRB so that only CRS RE is sent in the second PRB). On the other hand, in NBIoT, when the eNB schedules 1 PRB for PDSCH transmission, the NBIoT UE receiving bandwidth, which cannot be adjusted by eNB scheduling, is fixed to 1 PRB. Therefore, it is not possible to balance power between PRBs by reducing the load for some PRBs in NBIoT.

[0036] Therefore, in NBIoT, the power must be designed to be the same per symbol per PRB. Summary of the invention

[0037] A method and apparatus for downlink power allocation for NBIoT are disclosed.

[0038] In one embodiment, a method includes receiving a first reference signal (NRS), first data, and second data, wherein the first reference signal is associated with a first transmission power (E_NRS); the first data is located in a symbol without the first reference signal, and the first data is associated with a second transmission power (E_A); and the second data is located in a symbol in which the first reference signal is received; and the second data is associated with a third transmission power (E_B). The second transmission power (E_A) may be determined by the first transmission power (E_NRS) and a first power ratio (ρ A ). The third transmission power (E_B) may be determined by the first transmission power (E_NRS) and the second power ratio (ρ B The second power ratio (ρ B ) can be represented by the first power ratio (ρ A ) and the number of antenna ports of the first reference signal (NRS).

[0039] In one embodiment, the method further includes receiving a second reference signal (CRS) and third data, wherein the second reference signal is associated with a fourth transmission power (E_CRS); and the third data is located in a symbol in which the second reference signal is received; and the third data is associated with a fifth transmission power (E_C). The fourth transmission power (E_CRS) may be a function of the first transmission power (E_NRS) and the third power ratio (ρ CRS The fifth transmission power (E_C) may be determined by the first transmission power (E_NRS) and the fourth power ratio (ρ C )Sure.

[0040] In another embodiment, the fourth power ratio (ρ C ) may be determined by at least one of the following: the number of antenna ports of the first reference signal (NRS), the number of antenna ports of the second reference signal (CRS), the first power ratio (ρ A ), the second power ratio (ρ B ), the third power ratio (ρ CRS ) and a predefined power ratio value (M).

[0041] In some embodiments, the fourth power ratio (ρ C ) is determined by the first power ratio (ρ A ) is determined by the number of antenna ports of the second reference signal (CRS). In other embodiments, the fourth power ratio (ρ C ) is determined by at least one of the following: by the first power ratio (ρ A ) and the third power ratio (ρ CRS ) determines the first power ratio (ρ C1 ), by the second power ratio (ρ B ) and the third power ratio (ρCRS ) determines the second power ratio (ρ C2 ), and a predefined power ratio value (M).

[0042] In some embodiments, the fourth power ratio (ρ C ) is determined by the first power ratio (ρ C1 ), the second power ratio (ρ C2 ) and the predefined power ratio value (M) in at least two of the larger value or the smaller value. The fourth power ratio (ρ C ) can be calculated based on the first power ratio (ρ C1 ) and the second power ratio (ρ C2 ) is indicated by higher layer signaling. The fourth power ratio (ρ C ) may alternatively be a value selected from a set of predefined power ratios, which is a value in the set that is greater than the first power ratio value (ρ C1 ) and the second power ratio (ρ C2 ), or a minimum value of one of the set that is smaller than the first power ratio (ρ C1 ) and the second power ratio (ρ C2 ) is the maximum value of one of the .

[0043] In one embodiment, a remote unit includes a receiver that receives a first reference signal (NRS), first data, and second data, wherein the first reference signal is associated with a first transmission power (E_NRS); the first data is located in a symbol without the first reference signal, and the first data is associated with a second transmission power (E_A); and the second data is located in a symbol in which the first reference signal is received; and the second data is associated with a third transmission power (E_B). The second transmission power (E_A) can be determined by the first transmission power (E_NRS) and the first power ratio (ρ A ). The third transmission power (E_B) may be determined by the first transmission power (E_NRS) and the second power ratio (ρ B The second power ratio (ρ B ) can be represented by the first power ratio (ρ A ) and the number of antenna ports of the first reference signal (NRS).

[0044] In another embodiment, a method includes sending a first reference signal (NRS), first data, and second data, wherein the first reference signal is associated with a first transmission power (E_NRS); the first data is located in a symbol without the first reference signal, and the first data is associated with a second transmission power (E_A); and the second data is located in a symbol in which the first reference signal is sent; and the second data is associated with a third transmission power (E_B).

[0045] In yet another embodiment, a base station unit includes a transmitter that sends a first reference signal (NRS), first data, and second data, wherein the first reference signal is associated with a first transmission power (E_NRS); the first data is located in a symbol without the first reference signal, and the first data is associated with a second transmission power (E_A); and the second data is located in a symbol in which the first reference signal is sent; and the second data is associated with a third transmission power (E_B). BRIEF DESCRIPTION OF THE DRAWINGS

[0046] A more particular description of the embodiments briefly described above will be presented by reference to specific embodiments that are illustrated in the accompanying drawings. Understanding that these drawings depict only some embodiments and are therefore not to be considered limiting in scope, the embodiments will be described and explained with additional specificity and detail through the use of the accompanying drawings, in which:

[0047] Figure 1 illustrates an example of downlink power allocation for LTE;

[0048] Figure 2 Figure ρ for different values ​​of PB B / ρ A The value of

[0049] Figures 3A-3E Examples illustrating power efficiency in different configurations of PA and PB;

[0050] Figure 4 An example of downlink power allocation for LTE by offloading PRBs is illustrated;

[0051] Figures 5A-5C An example of downlink power allocation for NBIoT is shown;

[0052] Figure 6 Figure ρ for different values ​​of PB B / ρ A The value of

[0053] Figure 7 Figure ρ for different values ​​of PC C / ρ A The value of

[0054] Figure 8 An example of a problem for configuring a PC individually is shown;

[0055] Fig. 9 is a schematic flow chart illustrating an embodiment of a method;

[0056] Fig.10 is a schematic flow chart illustrating yet another embodiment of the method; and

[0057] Fig.11 is a schematic block diagram illustrating an apparatus according to one embodiment. DETAILED DESCRIPTION

[0058] As will be appreciated by those skilled in the art, certain aspects of the embodiments may be embodied as systems, devices, methods or program products. Thus, the embodiments may take the form of a complete hardware embodiment, a complete software embodiment (including firmware, resident software, microcode, etc.), or a combination of software and hardware aspects, which may be generally referred to herein as a "circuit," "module," or "system." In addition, the embodiments may take the form of a program product embodied in one or more computer-readable storage devices, which store machine-readable code, computer-readable code, and / or program code, hereinafter referred to as "code." The storage device may be tangible, non-temporary, and / or non-transmitting. The storage device may not embody a signal. In a certain embodiment, the storage device employs only a signal for accessing the code.

[0059] Some functional units described in this specification may be labeled as "modules" to more specifically emphasize their independent implementation. For example, a module may be implemented as a hardware circuit including custom very large scale integration (VLSI) circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components. A module may also be implemented in a programmable hardware device such as a field programmable gate array, programmable array logic, a programmable logic device, etc.

[0060] Modules may also be implemented in code and / or software for execution by various types of processors. An identification module of code may, for example, include one or more physical or logical blocks of executable code, which may, for example, be organized as objects, procedures, or functions. However, the executable files identifying the modules need not be physically located together, but may include different instructions stored in different locations, which, when logically joined together, comprise the module and implement the stated purpose of the module.

[0061] In fact, the module of code can contain a single instruction or many instructions, and can even be distributed on several different code segments, in different programs and across several memory devices. Similarly, operating data can be identified and illustrated in this article in the module and can be embodied in any suitable form and organized in the data structure of any suitable type. The operating data can be collected as a single data set, or can be distributed on different locations, including on different computer-readable storage devices. In the case where a module or parts of a module are implemented in software, the software part is stored on one or more computer-readable storage devices.

[0062] Any combination of one or more computer readable media may be utilized. The computer readable medium may be a computer readable storage medium. The computer readable storage medium may be a storage device storing code. The storage device may be, for example, but not necessarily, an electronic, magnetic, optical, electromagnetic, infrared, holographic, micromechanical, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.

[0063] A non-exhaustive list of more specific examples of storage devices would include the following: an electrical connection having one or more wires, a portable computer floppy disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer-readable storage medium may be any tangible medium that can contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0064] The code for performing the operations of the embodiments may include any number of lines and may be written in any combination of one or more programming languages ​​including object-oriented programming languages ​​such as Python, Ruby, Java, Smalltalk, C++, etc., conventional procedural programming languages ​​such as the "C" programming language, and / or machine languages ​​such as assembly languages. The code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the last scenario, the remote computer may be connected to the user's computer through any type of network including a local area network (LAN) or a wide area network (WAN), or a connection to an external computer may be made (e.g., over the Internet using an Internet service provider).

[0065] References to "one embodiment", "embodiment" or similar language throughout the specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment. Therefore, unless otherwise expressly specified, the phrases "in one embodiment", "in an embodiment" and similar language throughout the specification may, but not necessarily, refer to the same embodiment, but rather mean "one or more but not all embodiments". Unless otherwise expressly specified, the terms "include", "comprising", "having" and their variations mean "including but not limited to". Unless otherwise expressly specified, an enumerated list of items does not imply that any or all of the items are mutually exclusive. Unless otherwise expressly specified, the terms "one", "an" and "the" also mean "one or more".

[0066] In addition, the features, structures or characteristics of the descriptions of the various embodiments may be combined in any suitable manner. In the following description, many specific details are provided, such as examples of programming, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, etc., to provide a thorough understanding of the embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more of the specific details or using other methods, components, materials, etc. In other cases, well-known structures, materials or operations are not shown or described in detail to avoid confusing aspects of the embodiments.

[0067] Aspects of different embodiments are described below with reference to schematic flow charts and / or schematic block diagrams of methods, devices, systems, and program products according to embodiments. It will be understood that each frame of the schematic flow chart and / or schematic block diagram and the combination of frames in the schematic flow chart and / or schematic block diagram can be implemented by code. The code can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine, so that instructions executed by a processor of a computer or other programmable data processing device create a device for implementing the functions specified for a frame or frames in the schematic flow chart and / or schematic block diagram.

[0068] The code may also be stored in a storage device that is capable of directing a computer, other programmable data processing apparatus, or other device to function in a specific manner so that the instructions stored in the storage device produce a product including instructions for implementing the functions specified in a box or multiple boxes of the schematic flowchart and / or schematic block diagram.

[0069] The code may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable apparatus, or other device to produce a computer-implemented process, so that the code executed on the computer or other programmable apparatus provides a process for implementing the functions specified in a block or blocks of the flowchart and / or block diagram.

[0070] The schematic flow charts and / or schematic block diagrams in the figures illustrate the architecture, functions and operations of possible implementations of the devices, systems, methods and program products according to various embodiments. In this regard, each box in the schematic flow charts and / or schematic block diagrams may represent a module, segment or portion of code, which includes one or more executable instructions of the code for implementing the specified logical function.

[0071] It should also be noted that in some alternative implementations, the functions annotated in the blocks may not occur in the order indicated in the various figures. For example, two blocks shown in succession may be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order, depending on the functions involved. Other steps and methods may be envisioned that are equivalent in function, logic, or effect to one or more blocks or portions thereof of the illustrated figures.

[0072] Although various arrow types and line types can be adopted in flow charts and / or block diagrams, they are understood to not limit the scope of the corresponding embodiments. In fact, some arrows or other connectors can be used to indicate the logical flow of only the depicted embodiments. For example, an arrow can indicate a waiting or monitoring period of unspecified duration between the enumeration steps of the depicted embodiments. It will also be noted that each frame of the block diagram and / or flow chart and the combination of the frames in the block diagram and / or flow chart can be realized by a system based on dedicated hardware or a combination of dedicated hardware and code that performs a specified function or action.

[0073] The description of an element in each figure may refer to an element of a previous figure. The same reference numerals refer to the same elements in all figures, including alternative embodiments of the same elements.

[0074] As described in the background technology section, NBIoT UE receives downlink signals with a bandwidth of 1 PRB and the PDSCH bandwidth is fixed to 1 PRB for in-band deployment. Therefore, it is necessary to determine the time domain power (EPRE) of NBIoT in one carrier or one PRB bandwidth (i.e., 12 subcarriers).

[0075] In NBIoT, the downlink RE can be either NPDSCH RE or NRS RE. Figure 5A An example of downlink power allocation for NBIoT in case of guard band deployment or standalone deployment is shown, where the number of NRS antenna ports is 2 (e.g., NRS antenna port 0 and NRS antenna port 1). Figure 5A In the figure, “N0” refers to the NRS RE of NRS antenna port 0.

[0076] exist Figure 5A In the example of FIG. 1 , symbols in one carrier or PRB are divided into two types (Type A symbols, Type B symbols).

[0077] If the symbol does not contain any NRS (narrowband reference signal) RE (in Figure 5A If all of the 12 REs indicated as N0 in the figure are NPDSCH REs, the symbol belongs to type A symbol. Figure 5A Symbols 0, 1, 2, 3, and 4 of a time slot belong to type A symbols.

[0078] If 12 REs in a symbol include NPDSCH RE, for example, both NRS RE and NPDSCH RE, the symbol belongs to type B symbol. Figure 5A Symbols 5 and 6 in are type B symbols.

[0079] Can from Figure 5A It can be seen that RE can be divided into 3 categories: NRS RE, NPDSCH RE in type A symbol, NPDSCH RE in type B symbol. By the way, the REs shown as blank blocks ((symbol 5, subcarrier 3), (symbol 5, subcarrier 9), (symbol 6, subcarrier 0), and (symbol 6, subcarrier 6)) are NRS REs of another NRS antenna port (e.g., NRS antenna port 1). Therefore, Figure 5A The EPRE in PRB can be divided into three categories:

[0080] (1) EPRE of NRS RE (i.e., NRS EPRE, abbreviated as E_NRS);

[0081] (2) the EPRE of each NPDSCH RE in a Type A symbol (i.e., E_A); and

[0082] (3) EPRE of each NPDSCH RE in type B symbols (i.e., E_B).

[0083] Incidentally, the EPRE of the NRS RE of another NRS antenna port is zero (0).

[0084] S_A represents the total power of a type A symbol in one PRB or one carrier including 12 PDSCH REs, that is, S_A = 12*E_A. S_B represents the total power of a type B symbol in one PRB or one carrier. Figure 5A In the case where the number of antenna ports is 2, S_B=2*E_NRS+8*E_B. The power efficiency of each PRB or each allocated UE is defined as min(S_A, S_B) / max(S_A, S_B).

[0085] In the case of in-band deployment, the downlink RE may alternatively be a CRS RE. Therefore, in the case of in-band deployment, the downlink RE may be a NPDSCH RE or a NRS RE or a CRS RE. Figure 5B An example of downlink power allocation for NBIoT in the case of in-band deployment is shown, where the number of antenna ports (e.g., NRS antenna port 0) is 1 and the number of CRS antenna ports (e.g., CRS antenna port 0) is 1. Figure 5BIn the figure, “N0” refers to the NRS RE of NRS antenna port 0, and “R0” refers to the CRS RE of CRS antenna port 0).

[0086] exist Figure 5B In the example of , symbols in one PRB can be divided into three types (type A symbols, type B symbols, type C symbols).

[0087] If the symbol does not contain any NRS RE (in Figure 5B N0) or CRS RE (indicated as N0 in Figure 5B If all of the 12 REs indicated as R0 in the figure are NPDSCH REs, the symbol belongs to type A symbol. Figure 5B Symbols 1, 2, and 4 in belong to type A symbols. If the number of CRS antenna ports is 4, symbol 1 does not belong to type A symbols but to type C symbols (see below).

[0088] If 12 REs in a symbol include NRS REs, for example, both NRS REs and NPDSCH REs, the symbol belongs to a type B symbol. Figure 5B Symbols 5 and 6 in are type B symbols.

[0089] If 12 REs in a symbol include CRS REs, for example, both CRS REs and NPDSCH REs, the symbol belongs to a type C symbol. Figure 5B Symbols 0 and 3 in belong to type C symbols. If the number of CRS antenna ports is 4, symbol 1 also belongs to type C symbol.

[0090] Can from Figure 5B As can be seen, REs can be divided into 5 categories: NRS REs, NPDSCH REs in type A symbols, NPDSCH REs in type B symbols, and CRS REs and NPDSCH REs in type C symbols. Figure 5B The EPRE in PRB can be divided into five categories:

[0091] (1) EPRE of NRS RE (i.e., NRS EPRE, abbreviated as E_NRS);

[0092] (2) EPRE of each NPDSCH RE in type A symbols (i.e., E_A);

[0093] (3) EPRE of each NPDSCH RE in type B symbols (i.e., E_B);

[0094] (4) EPRE for each NPDSCH RE in a Type C symbol (i.e., E_C); and

[0095] (5) EPRE of CRS RE (i.e., CRS EPRE, abbreviated as E_CRS).

[0096] S_A represents the total power of a type A symbol in one PRB or one carrier including 12 PDSCH REs, that is, S_A = 12*E_A. S_B represents the total power of a type B symbol in one PRB or one carrier. Figure 5B In , a type B symbol includes 2 NRS REs and 10 PDSCH REs, i.e., S_B = 2*E_NRS + 10*E_B. S_C represents the total power of a type C symbol in 1 PRB or 1 carrier. Figure 5B In the example, a type C symbol includes 2 CRS REs and 10 PDSCH REs, ie, S_C = 2*E_CRS + 10*E_C. The power efficiency of each PRB or each allocated UE is defined as min(S_A, S_B, S_C) / max(S_A, S_B, S_C).

[0097] Figure 5C is another example of downlink power allocation for NBIoT in the case of in-band deployment, where the number of NRS antenna ports is 2 (e.g., NRS antenna port 0 and NRS antenna port 1) and the number of CRS antenna ports is 2 (e.g., CRS antenna port 0 and CRS antenna port 1).

[0098] If you can Figure 5C As can be seen, "N0" refers to the NRS RE of NRS antenna port 0 and "R0" refers to the CRS RE of CRS antenna port 0. In type B symbols 5 and 6, there are four REs ((symbol 5, subcarrier 3), (symbol 5, subcarrier 9), (symbol 6, subcarrier 0) and (symbol 6, subcarrier 6) shown as blank blocks, which are NRS REs of another antenna port (e.g., NRS antenna port 1). Similarly, in type C symbols 0 and 4, there are four REs ((symbol 0, subcarrier 3), (symbol 0, subcarrier 9), (symbol 4, subcarrier 0) and (symbol 4, subcarrier 6)) shown as blank blocks, which are CRS REs of another CRS antenna port (e.g., CRS antenna port 1).

[0099] Figure 5C The EPRE in a PRB or carrier can be divided into Figure 5B The same 5 categories described in the EPRE of the PRB.

[0100] The EPRE of NRS RE (e.g., NRS antenna port 0) is E_NRS. The EPRE of CRS RE (e.g., CRS antenna port 0) is E_CRS. Figure 5CIn the example of , S_A=12*E_A; S_B=2*E_NRS+8*E_B; and S_C=2*E_CRS+8*E_C.

[0101] In general, each NRS RE, each NPDSCH RE in a type A symbol, each NPDSCH RE in a type B symbol, each NPDSCH RE in a type C symbol, and each CRS RE are associated with E_NRS, E_A, E_B, E_C, and E_CRS, respectively. This means that the eNB sends data or reference signals in each NRS RE, each NPDSCH RE in type A symbols, each NPDSCH RE in type B symbols, each NPDSCH RE in type C symbols, and each CRSRE with the powers of E_NRS, E_A, E_B, E_C, and E_CRS, respectively, and the UE assumes the same situation (i.e., the UE assumes that the eNB sends the NBIoT reference signal in each NRS RE with the power of E_NRS, sends data in each NPDSCH RE in type A symbols with the power of E_A, sends data in each NPDSCH RE in type B symbols with the power of E_B, sends data in each NPDSCH RE in type C symbols with the power of E_C, and sends the cell-specific reference signal in each CRS RE with the power of E_CRS).

[0102] NRS EPRE (E_NRS) is constant across the downlink system bandwidth (i.e. 1 PRB) and is configured by higher layers. For example, the downlink NRS EPRE (E_NRS) can be derived from the downlink narrowband reference signal transmission power given by nrs-Power + nrs-PowerOffsetNonAnchor, where the parameter nrs-Power is provided by a higher layer and nrs-PowerOffsetNonAnchor is zero if it is not provided by a higher layer.

[0103] The first embodiment is related to the configuration of EPRE (E_A) for each NPDSCH RE in a type A symbol and EPRE (E_B) for each NPDSCH RE in a type B symbol.

[0104] The ratio of E_A to E_NRS is given by ρ A =E_A / E_NRS. A Determined by PA, and in particular, PA[dB]=10lgρ A The PA is configured by a higher layer parameter pa from the set {-6, -4.77, -3, -1.77, 0, 1, 2, 3} [dB]. According to PA [dB] = 10 lgρ A , ρA is a number selected from the set {1 / 4, 1 / 3, 1 / 2, 2 / 3, 1, 1.2589, 1.5849, 2}.

[0105] The ratio of E_B to E_NRS is given by ρ B =E_B / E_NRS.

[0106] ρ B can be determined by PB. Specifically, ρ B / ρ A Determined by the value of PB. PB is the NPDSCH EPRE power index and is configured by a higher layer parameter pb from the set {0, 1, 2, 3}. Figure 6 Figure ρ for different values ​​of PB B / ρ A Under the condition of "one NRS antenna port" and under the condition of "two NRS antenna ports", ρ B / ρ A The value of is different for the same value of PB.

[0107] On the other hand, in order to facilitate AGC by the UE and at least for independent deployment (to ensure that the power of type A symbols and type B symbols within 1 PRB or 1 carrier is the same), p B Alternatively, we can directly use ρ A For example, for an NRS antenna port ρ B =6ρ A / 5-1 / 5, and for two NRS antenna ports ρ B =3ρ A / 2-1 / 4.

[0108] The second embodiment is related to the configuration of EPRE (E_C) of each NPDSCH RE and EPRE (E_CRS) of CRS RE in type C symbols.

[0109] The EPRE of CRS RE (E_CRS) is based on the NRS EPRE (E_NRS) through the higher layer parameter nrs-CRS-PowerOffset (ρ CRS ) is determined by CRS =E_CRS / E_NRS.

[0110] E_C can be derived by introducing the parameter PC. In particular, the ratio of E_C to E_NRS is given by ρ C =E_C / E_NRS. C Determined by PC, and specifically, PC[dB]=101 gρ CPC is configured by a higher layer parameter pc from the set {-6, -4.77, -3, -1.77, 0, 1, 2, 3} [dB]. According to PC [dB] = 10lgρ C , ρ C is a number selected from the set of {1 / 4, 1 / 3, 1 / 2, 2 / 3, 1, 1.2589, 1.5849, 2}. When E_C is determined by the parameter PC, the value of E_C is not constrained by E_A and / or E_B and / or E_CRS. That is, if the power of S_C is greater than the larger of S_A and S_B or less than the smaller of S_A and S_B, the power efficiency will be reduced, so that the detection performance of the UE will be degraded due to inaccurate AGC.

[0111] In view of the above, E_C can be alternatively derived by configuring the parameter PC in different ways. In particular, the ratio of E_C to E_NRS is given by ρ C =E_C / E_NRS. C can be determined by PC. Specifically, ρ C / ρ A Determined by the value of PC. PC is configured by a higher layer parameter pc from the set {0, 1, 2, 3}. Figure 7 Figure ρ for different values ​​of PC C / ρ A Under the condition of "one CRS antenna port" and under the condition of "two or four CRS antenna ports", ρ C / ρ A The value of is different for the same value of PC. This gives more flexibility to the eNB.

[0112] The number of CRS ports is determined by the number of NRS antenna ports and some other higher-layer parameters.

[0113] If higher layers indicate that the PCID for LTE is the same as the PCID for NBIoT, the UE shall assume that the number of CRS antenna ports is the same as the number of NRS antenna ports.

[0114] Otherwise, the number of CRS antenna ports is obtained from the higher layer parameter eutra-NumCRS-Ports. The higher layer parameter eutra-NumCRS-Ports can have the value "Same" (which means the number of CRS antenna ports is the same as the number of NRS antenna ports) or "four(4)" (which means the number of CRS antenna ports is 4). In general, when the number of NRS antenna ports is 1, the number of CRS antenna ports can be 1 or 4; and when the number of NRS antenna ports is 2, the number of CRS antenna ports can be 2 or 4.

[0115] According to the second embodiment, the ratio of EPRE (E_C) to NRS EPRE (E_NRS) of each NPDSCH RE in a type C symbol is given by p C This seems to provide more configuration flexibility to the eNB. However, it is difficult for the eNB to configure all of the parameters PA, PB, and PC to improve power efficiency. In fact, some parameters are useless. For example, when S_A and S_B are determined by the parameters PA and PB, if we do not want to even degrade the power efficiency and affect the UE AGC, the power range of S_C is almost determined (that is, PC is also almost determined). In other words, there is no need to configure the parameter PC. If we force the eNB to configure the parameter PC, this will increase the load of network optimization.

[0116] exist Figure 8 An example is illustrated in , where the number of NRS antenna ports is 1 and the number of CRS antenna ports is 1. Figure 8 middle,

[0117] E_NRS=80dBm,

[0118] PA=-3dB->E_A=40dBm,

[0119] PB=0->ρB / ρA=1->E_B=40dBm,

[0120] E_NRS / E_CRS=8->E_CRS=10dBm.

[0121] Under this condition, E_C should be increased due to the lower power of E_CRS. However, E_C can only be configured to a maximum of 40dBm (when p C / ρ A =1, 1 is the maximum value for 1 CRS antenna port). In view of the above, even if the configuration of PA, PB and PC is flexible, the power efficiency is still not high. No matter which value (420dBm or 480dBm or 560dBm power) the UE chooses to adjust the AGC, the performance of demodulation is greatly degraded.

[0122] According to the third embodiment, the ratio of E_C to E_NRS is given by C =E_C / E_NRS. C Based on the existing parameters PA and / or PB and / or ρ CRS Or the existing parameter ρ A and / or B and / or CRS The power of type C symbols (S_C) can be easily derived by referring to the power of type A symbols (S_A) and / or the power of type B symbols (S_B). The eNB can configure PA and / or PB (or configure pA and / or B ) and / or CRS To indirectly configure ρ C .

[0123] In a first sub-embodiment, the power of S_C is the same as the power of S_A (S_C=S_A).

[0124] S_A=12*E_A=12*ρ A *E_NRS.

[0125] For one CRS antenna port, S_C is expressed as S_C1=2*E_CRS+10*E_C=2*ρ CRS *E_NRS+10*ρ C *E_NRS. For two or four CRS antenna ports, S_C is expressed as S_C2 = 2*E_CRS + 8*E_C = 2*ρ CRS *E_NRS+8*ρ C *E_NRS.

[0126] Therefore, under the condition of one CRS antenna port, S_A=S_C1->12*ρ A *E_NRS=2*ρ CRS *E_NRS+10*ρ C *E_NRS->ρ C =6ρ A / 5-ρ CRS / 5. Under the condition of two or four CRS antenna ports, S_A=S_C2->12*ρ A *E_NRS=2*ρ CRS *E_NRS+8*ρ C *E_NRS->ρ C =3ρ A / 2-ρ CRS / 4.

[0127] According to the first sub-embodiment, p C It is represented by ρ C1 And can be determined as shown in Table 2 below.

[0128] Table 2: ρ under different numbers of CRS antenna ports C1

[0129]

[0130] In the second sub-embodiment, the power of S_C is the same as the power of S_B (S_C=S_B).

[0131] For one NRS antenna port, S_B is expressed as S_B1=2*E_NRS+10*E_B=2*E_NRS+10*ρ B *E_NRS. For two NRS antenna ports, S_B is expressed as S_B2=2*E_NRS+8*E_B=2*E_NRS+8*ρ B *E_NRS.

[0132] For one CRS antenna port, S_C is expressed as S_C1=2*E_CRS+10*E_C=2*ρ CRS *E_NRS+10*ρ C *E_NRS. For two or four CRS antenna ports, S_C is expressed as S_C2 = 2*E_CRS + 8*E_C = 2*ρ CRS *E_NRS+8*ρ C *E_NRS.

[0133] Under the condition of one NRS antenna port and one CRS antenna port, S_B1=S_C1->2*E_NRS+10*ρ B *E_NRS=2*ρ CRS *E_NRS+10*ρ C *E_NRS->ρ C =1 / 5+ρ B -ρ CRS / 5.

[0134] Under the condition of one NRS antenna port and two or four CRS antenna ports, S_B1=S_C2->2*E_NRS+10*ρ B *E_NRS=2*ρ CRS *E_NRS+8*ρ C *E_NRS->ρ C =1 / 4+5ρ B / 4-ρ CRS / 4.

[0135] Under the condition of two NRS antenna ports and two or four CRS antenna ports, S_B2 = S_C2->2*E_NRS+8*ρ B *E_NRS=2*ρ CRS *E_NRS+8*ρ C *E_NRS->ρ C =1 / 4+ρ B -ρ CRS / 4.

[0136] According to the second sub-embodiment, p C It is represented by ρ C2And can be determined as shown in Table 3

[0137] Table 3: ρ under different numbers of NRS antenna ports and different numbers of CRS antenna ports C2

[0138]

[0139] In the third sub-embodiment, the power of S_C is determined according to the first sub-embodiment and the second sub-embodiment, respectively. In particular, p C1 is determined according to the first sub-embodiment and ρ C2 is determined according to the second sub-embodiment. According to the third sub-embodiment, ρ C It is represented by ρ C3 and can be determined as ρ C1 and ρ C2 The eNB may indicate p through higher layer signaling based on its implementation. C3 For example, 1 bit can be used to indicate whether p is to be applied. C1 or C2 .

[0140] In the fourth sub-embodiment, the eNB may select the p closest to the above determination from the predefined set of {-6, -4.77, -3, -1.77, 0, 1, 2, 3} C1 , C2 and ρ C3 The value of one of the above. The closest to the above determined ρ is selected from the set C1 , C2 and ρ C3 One of the C0 ) (called ρ C4 ) means that a number greater than ρ is selected from the set C0 The minimum value of , or a value less than ρ selected from the set C0 For example, if ρ C0 (The above determined ρ C1 , C2 and ρ C3 One of the above-determined C1 and ρ C2 One of them, because ρ C3 are ρC1 and ρ C2 If one of the two is -1, then ρ C4 This can be -1.77 (the largest value in the set that is less than -1) or 0 (the smallest value in the set that is greater than -1).

[0141] In the fifth sub-embodiment, a predefined value M can be introduced to limit ρ C In one embodiment, the predefined value M may refer to pC For example, M is a predefined value of 0.25 (i.e. -6 dB). In this embodiment, ρ C1 can be determined as shown in Table 4 below.

[0142] Table 4: ρ for different numbers of CRS antenna ports with minimum value M C1

[0143]

[0144] And, C2 can be determined as shown in Table 5 below.

[0145] Table 5: ρ under different numbers of NRS antenna ports and different numbers of CRS antenna ports with minimum value M C2

[0146]

[0147] In another embodiment, the predefined value M may refer to p C For example, M is a predefined value of 4 (i.e., 6 dB). In this embodiment, ρ C1 can be determined as shown in Table 6 below.

[0148] Table 6: ρ for different numbers of CRS antenna ports with maximum value M C1

[0149]

[0150] And, C2 It can be determined as shown in Table 7 below:

[0151] Table 7: ρ for different numbers of NRS antenna ports and different numbers of CRS antenna ports with maximum value M C2

[0152]

[0153] The fifth sub-embodiment can be used together with the third sub-embodiment or with the fourth sub-embodiment. For example, when used together with the third sub-embodiment, C1 is determined according to Table 4 or Table 6, and ρ C2 is determined according to Table 5 or Table 7. Then, the eNB may indicate p through higher layer signaling (e.g., 1 bit). C3 (i.e., ρ C1 or C2 ).

[0154] When used with the fourth embodiment, p C1 is determined according to Table 4 or Table 6, and ρC2 is determined according to Table 5 or Table 7. Then, a value (greater than ρ) is selected from the predefined set. C1 or C2 The minimum value of, or less than ρ C1 or C2 maximum value of ).

[0155] Therefore, it can be seen from the third embodiment that C1 is from ρ A and ρ CRS (First sub-embodiment) or from ρ A , CRS and the predefined value M (fifth sub-embodiment). Depending on the number of different CRS antenna ports, ρ C1 is determined differently. C2 is from ρ B and ρ CRS (Second sub-embodiment) or from ρ B , CRS and a predefined value M (fifth sub-embodiment). Depending on the number of different CRS antenna ports and / or the number of different NRS antenna ports, ρ C2 are determined differently. Therefore, ρ C By C1 , C2 and at least one of the predefined values ​​M. In particular, when M refers to ρ C When the minimum value of C By C1 , C2 and M are determined by the larger value of at least two of them; and when M refers to ρ C When the maximum value of C By C1 , C2 and M are determined by the smaller value of at least two of them. C3 is determined as C1 and ρ C2 One of them. C4 is through the reference ρ C1 and ρ C2 One of the is determined from a predefined set.

[0156] Fig. 9 is a schematic flow chart illustrating an embodiment of a method 900 according to the present application. In some embodiments, the method 900 is performed by a device such as a remote unit. In some embodiments, the method 900 may be performed by a processor that executes program code, such as a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, an FPGA, etc.

[0157] Method 900 may include receiving a first reference signal (NRS), first data, and second data, wherein the first reference signal is associated with a first transmission power (E_NRS); the first data is located in a symbol without the first reference signal, and the first data is associated with a second transmission power (E_A); and the second data is located in a symbol in which the first reference signal is received; and the second data is associated with a third transmission power (E_B).

[0158] Fig.10 1 is a schematic flow chart illustrating another embodiment of a method 1000 according to the present application. In some embodiments, the method 1000 is performed by a device such as a base station unit. In some embodiments, the method 1000 may be performed by a processor that executes program code, such as a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, an FPGA, etc.

[0159] Method 1000 may include sending a first reference signal (NRS), first data, and second data, wherein the first reference signal is associated with a first transmission power (E_NRS); the first data is located in a symbol without the first reference signal, and the first data is associated with a second transmission power (E_A); and the second data is located in a symbol in which the first reference signal is received; and the second data is associated with a third transmission power (E_B).

[0160] Fig.11 is a schematic block diagram illustrating an apparatus according to one embodiment.

[0161] refer to Fig.11 , UE (ie, remote unit) includes a processor, a memory and a transceiver. The processor is implemented in Fig. 9 The functions, processes and / or methods proposed in the eNB (i.e., base station unit) include a processor, a memory and a transceiver. The processor is implemented in Fig.10 The functions, processes and / or methods proposed in the present invention are described in detail. The layers of the radio interface protocol can be implemented by a processor. The memory is connected to the processor to store various pieces of information for driving the processor. The transceiver is connected to the processor to send and / or receive radio signals. Needless to say, the transceiver can be implemented as a transmitter for sending radio signals and a receiver for receiving radio signals.

[0162] The memory may be located inside or outside the processor and connected to the processor through various well-known means.

[0163] In the above-described embodiments, the components and features of the embodiments are combined in a predetermined form. Unless otherwise explicitly stated, each component or function should be considered as an option. Each component or feature can be implemented to be not associated with other components or features. In addition, the embodiment can be configured by associating some components and / or features. The order of the operations described in the embodiment can be changed. Some components or features of any embodiment can be included in another embodiment or replaced with components and features corresponding to another embodiment. It is obvious that claims that are not explicitly cited in the claims are combined to form embodiments or are included in new claims.

[0164] The embodiments may be implemented by hardware, firmware, software or a combination thereof. In the case of being implemented by hardware, according to the hardware implementation, the exemplary embodiments described herein may be implemented by using one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, etc.

[0165] Embodiments may be practiced in other specific forms. The described embodiments are to be considered in all respects as merely illustrative and not restrictive. The scope of the present invention is therefore indicated by the appended claims rather than by the preceding description. All changes falling within the equivalent meaning and scope of the claims should be included within their scope.

Claims

1. A method for power allocation for narrowband Internet of Things (NB-IoT) performed by a user equipment (UE), comprising: A narrowband reference signal (NRS), first data, and second data are received, wherein The NRS is associated with a first transmission power; The first data is received in a symbol without the NRS, and the first data is associated with a second transmission power; and The second data is received in the symbol, and the second data is associated with a third transmission power.

2. The method according to claim 1, further comprising: receiving a cell reference signal (CRS) and third data, wherein The CRS is associated with a fourth transmission power; The third data is located in a corresponding symbol in which the CRS is received, and the third data is associated with a fifth transmission power.

3. The method according to claim 1, wherein: The second transmission power is a function of the first transmission power and a first power ratio (ρ A )Sure.

4. The method according to claim 1, wherein: The third transmission power is a ratio of the first transmission power to the second power (ρ B )Sure.

5. The method according to claim 2, wherein: The fourth transmission power is a ratio of the first transmission power to a third power (ρ CRS )Sure.

6. The method according to claim 2, wherein: The fifth transmission power is a ratio of the first transmission power to a fourth power (ρ C )Sure.

7. The method according to claim 4, wherein: The second power ratio (ρ B ) is determined by the first power ratio (ρ A ) and a first number of antenna ports associated with the NRS.

8. The method according to claim 6, wherein: The fourth power ratio (ρ C ) is determined by at least one of: a first number of antenna ports associated with the NRS, a second number of antenna ports associated with the CRS, a first power ratio (ρ A ), the second power ratio (ρ B ), the third power ratio (ρ CRS ) and predefined power ratio values.

9. The method according to claim 8, wherein: The fourth power ratio (ρ C ) is determined by the first power ratio (ρ A ) and a second number of antenna ports associated with the CRS.

10. The method according to claim 8, wherein: The fourth power ratio (ρ C ) is determined by at least one of the following: A ) and the third power ratio (ρ CRS ) determines the first power ratio (ρ C1 ), by the second power ratio (ρ B ) and the third power ratio (ρ CRS ) determines the second power ratio (ρ C2 ), and the predefined power ratio value.

11. The method according to claim 10, wherein: The fourth power ratio (ρ C ) is obtained by the first power ratio (ρ C1 ), the second power ratio (ρ C2 ) and the larger or smaller value of at least two of the predefined power ratio values.

12. The method according to claim 10, wherein: The fourth power ratio (ρ C ) is indicated by higher layer signaling as the first power ratio (ρ C1 ) or the second power ratio (ρ C2 ).

13. The method according to claim 10, wherein: The fourth power ratio (ρ C ) is a value selected from a predefined power ratio set, the value being a value in the set that is greater than the first power ratio value (ρ C1 ) and the second power ratio (ρ C2 ), or a minimum value of one of the power ratios in the set that is smaller than the first power ratio (ρ C1 ) and the second power ratio (ρ C2 ) is the maximum value of one of the .

14. A user equipment (UE) for power allocation for narrowband Internet of Things (NB-IoT), comprising: A receiver, the receiver receiving a narrowband reference signal (NRS), first data and second data, wherein The NRS is associated with a first transmission power; The first data is received in a symbol without the NRS, and the first data is associated with a second transmission power; and The second data is received in the symbol, and the second data is associated with a third transmission power.

15. The UE according to claim 14, wherein: The receiver further receives a cell reference signal (CRS) and third data, wherein The CRS is associated with a fourth transmission power; and The third data is located in a corresponding symbol in which the CRS is received, and the third data is associated with a fifth transmission power.

16. The UE according to claim 14, wherein: The second transmission power is a function of the first transmission power and a first power ratio (ρ A )Sure.

17. The UE according to claim 14, wherein: The third transmission power is a ratio of the first transmission power to the second power (ρ B )Sure.

18. The UE according to claim 15, wherein: The fourth transmission power is a ratio of the first transmission power to a third power (ρ CRS )Sure.

19. The UE according to claim 15, wherein: The fifth transmission power is a ratio of the first transmission power to a fourth power (ρ C )Sure.

20. The UE according to claim 17, wherein: The second power ratio (ρ B ) is determined by the first power ratio (ρ A ) and the number of antenna ports associated with the NRS.

21. The UE according to claim 19, wherein: The fourth power ratio (ρ C ) is determined by at least one of: a first number of antenna ports associated with the NRS, a second number of antenna ports associated with the CRS, a first power ratio (ρ A ), the second power ratio (ρ B ), the third power ratio (ρ CRS ) and predefined power ratio values.

22. The UE according to claim 21, wherein: The fourth power ratio (ρ C ) is determined by the first power ratio (ρ A ) and a second number of antenna ports associated with the CRS.

23. The UE according to claim 21, wherein: The fourth power ratio (ρ C ) is determined by at least one of the following: A ) and the third power ratio (ρ CRS ) determines the first power ratio (ρ C1 ), by the second power ratio (ρ B ) and the third power ratio (ρ CRS ) determines the second power ratio (ρ C2 ), and the predefined power ratio value.

24. The UE according to claim 23, wherein: The fourth power ratio (ρ C ) is obtained by the first power ratio (ρ C1 ), the second power ratio (ρ C2 ) and the larger or smaller value of at least two of the predefined power ratio values.

25. The UE according to claim 23, wherein: The fourth power ratio (ρ C ) is indicated by higher layer signaling as the first power ratio (ρ C1 ) or the second power ratio (ρ C2 ).

26. The UE according to claim 23, wherein: The fourth power ratio (ρ C ) is a value selected from a predefined power ratio set, the value being a value in the set that is greater than the first power ratio value (ρ C1 ) and the second power ratio (ρ C2 ), or a minimum value of one of the power ratios in the set that is smaller than the first power ratio (ρ C1 ) and the second power ratio (ρ C2 ) is the maximum value of one of the .

27. A method for power allocation for narrowband Internet of Things (NB-IoT) performed by a base station unit, comprising: A narrowband reference signal (NRS), first data and second data are sent, wherein The NRS is associated with a first transmission power; The first data is transmitted in a symbol without the NRS, and the first data is associated with a second transmission power; and The second data is located in the symbol in which the NRS is transmitted, and the second data is associated with a third transmission power.

28. The method of claim 27, further comprising: Sending a cell reference signal (CRS) and third data, wherein The CRS is associated with a fourth transmission power, and The third data is located in a corresponding symbol in which the CRS is transmitted, and the third data is associated with a fifth transmission power.

29. The method according to claim 27, wherein: The second transmission power is a function of the first transmission power and a first power ratio (ρ A )Sure.

30. The method of claim 27, wherein: The third transmission power is a ratio of the first transmission power to the second power (ρ B )Sure.

31. The method of claim 28, wherein: The fourth transmission power is a ratio of the first transmission power to a third power (ρ CRS )Sure.

32. The method of claim 28, wherein: The fifth transmission power is a ratio of the first transmission power to a fourth power (ρ C )Sure.

33. The method of claim 30, wherein: The second power ratio (ρ B ) is determined by the first power ratio (ρ A ) and a first number of antenna ports associated with the NRS.

34. The method of claim 32, wherein: The fourth power ratio (ρ C ) is determined by at least one of: a first number of antenna ports associated with the NRS, a second number of antenna ports associated with the CRS, a first power ratio (ρ A ), the second power ratio (ρ B ), the third power ratio (ρ CRS ) and predefined power ratio values.

35. The method of claim 34, wherein: The fourth power ratio (ρ C ) is determined by the first power ratio (ρ A ) and a second number of antenna ports associated with the CRS.

36. The method of claim 34, wherein: The fourth power ratio (ρ C ) is determined by at least one of the following: A ) and the third power ratio (ρ CRS ) determines the first power ratio (ρ C1 ), by the second power ratio (ρ B ) and the third power ratio (ρ CRS ) determines the second power ratio (ρ C2 ), and the predefined power ratio value.

37. The method of claim 36, wherein: The fourth power ratio (ρ C ) is obtained by the first power ratio (ρ C1 ), the second power ratio (ρ C2 ) and the larger or smaller value of at least two of the predefined power ratio values.

38. The method of claim 36, wherein: The fourth power ratio (ρ C ) is indicated by higher layer signaling as the first power ratio (ρ C1 ) or the second power ratio (ρ C2 ).

39. The method of claim 36, wherein: The fourth power ratio (ρ C ) is a value selected from a predefined power ratio set, the value being a value in the set that is greater than the first power ratio value (ρ C1 ) and the second power ratio (ρ C2 ), or a minimum value of one of the power ratios in the set that is smaller than the first power ratio (ρ C1 ) and the second power ratio (ρ C2 ) is the maximum value of one of the .

40. A base station unit for power distribution for narrowband Internet of Things (NB-IoT), comprising: A transmitter that sends a narrowband reference signal (NRS), first data, and second data, wherein The NRS is associated with a first transmission power; The first data is transmitted in a symbol without the NRS, and the first data is associated with a second transmission power; and The second data is located in the symbol in which the NRS is transmitted, and the second data is associated with a third transmission power.

41. The base station unit of claim 40, wherein: The transmitter further sends a cell reference signal CRS and third data, wherein The CRS is associated with a fourth transmission power; and The third data is located in a corresponding symbol in which the CRS is transmitted, and the third data is associated with a fifth transmission power.

42. The base station unit of claim 40, wherein: The second transmission power is a function of the first transmission power and a first power ratio (ρ A )Sure.

43. The base station unit of claim 40, wherein: The third transmission power is a ratio of the first transmission power to the second power (ρ B )Sure.

44. The base station unit of claim 41, wherein: The fourth transmission power is a ratio of the first transmission power to a third power (ρ CRS )Sure.

45. The base station unit of claim 41, wherein: The fifth transmission power is a ratio of the first transmission power to a fourth power (ρ C )Sure.

46. ​​The base station unit of claim 43, wherein: The second power ratio (ρ B ) is determined by the first power ratio (ρ A ) and a first number of antenna ports associated with the NRS.

47. The base station unit of claim 45, wherein: The fourth power ratio (ρ C ) is determined by at least one of: a first number of antenna ports associated with the NRS, a second number of antenna ports associated with the CRS, a first power ratio (ρ A ), the second power ratio (ρ B ), the third power ratio (ρ CRS ) and predefined power ratio values.

48. The base station unit of claim 47, wherein: The fourth power ratio (ρ C ) is determined by the first power ratio (ρ A ) and a second number of antenna ports associated with the CRS.

49. The base station unit of claim 47, wherein: The fourth power ratio (ρ C ) is determined by at least one of the following: A ) and the third power ratio (ρ CRS ) determines the first power ratio (ρ C1 ), by the second power ratio (ρ B ) and the third power ratio (ρ CRS ) determines the second power ratio (ρ C2 ), and the predefined power ratio value.

50. The base station unit of claim 49, wherein: The fourth power ratio (ρ C ) is obtained by the first power ratio (ρ C1 ), the second power ratio (ρ C2 ) and the larger or smaller value of at least two of the predefined power ratio values.

51. The base station unit of claim 49, wherein: The fourth power ratio (ρ C ) is indicated by higher layer signaling as the first power ratio (ρ C1 ) or the second power ratio (ρ C2 ).

52. The base station unit of claim 49, wherein: The fourth power ratio (ρ C ) is a value selected from a predefined power ratio set, the value being a value in the set that is greater than the first power ratio value (ρ C1 ) and the second power ratio (ρ C2 ), or a minimum value of one of the power ratios in the set that is smaller than the first power ratio (ρ C1 ) and the second power ratio (ρ C2 ) is the maximum value of one of the .

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