Enhancement of transmission power adaptation

Abstract

The embodiment of the invention relates to equipment, a method and a device for transmission power adaptation and a computer readable storage medium. The method includes receiving, at a first device, a channel state information configuration from a second device; and in response to receiving the reference signal from the second device, transmitting a channel state information report to the second device based on the channel state information configuration, the channel state information report including assistance information on transmission power adjustment for the second device. In this manner, adjustment of transmission power as well as bandwidth assignment may be implemented without degrading the supported multiple-input multiple-output layer. Therefore, spectral efficiency is improved while data delay and network energy consumption are reduced.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the field of telecommunications, and in particular, to devices, methods, apparatuses, and computer-readable storage media for transmission power adaptation. Background Art

[0002] The Radio Access Network (RAN) consumes a large portion of the total energy consumption in the network. Currently, the downlink (DL) transmission power (e.g., power spectral density per resource element (RE) / physical resource block (PRB)) is fixed by the gNB for all UEs in the cell. For network energy saving, DL transmission power adaptation is used by the network, for example on the Physical Downlink Shared Channel (PDSCH). Furthermore, in some cases, the bandwidth is adapted jointly with the transmission power. This means that the transmission power of the PDSCH changes dynamically depending on the UE channel quality. In other words, different power spectral densities can be used for different PRBs scheduled to different UEs.

[0003] According to some communication schemes, the dynamically changing power level on the PDSCH will inevitably affect the UE's derivation of channel state information (DCI) feedback and several internal receiver settings of the UE.Therefore, there is a need to improve transmission power adaptation for both the network and the UE. Summary of the invention

[0004] In general, example embodiments of the present disclosure provide a scheme for transmission power adaptation.

[0005] In a first aspect, a first device is provided. The first device includes: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code are configured to, together with the at least one processor, cause the first device to at least: receive channel state information, CSI, and configuration from a second device; and in response to receiving a reference signal from the second device, send a CSI report to the second device based on the CSI configuration, the CSI report including auxiliary information about transmission power adjustment for the second device.

[0006] In a second aspect, a second device is provided. The second device includes: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code are configured to, together with the at least one processor, cause the second device to at least: send channel state information, CSI, configuration to a first device; send a reference signal to the first device; and receive a CSI report from the first device based on the CSI configuration, the CSI report including auxiliary information about transmission power adjustment for the second device.

[0007] In a third aspect, a method is provided. The method includes: receiving, at a first device, channel state information, CSI, and a configuration from a second device; and in response to receiving a reference signal from the second device, sending a CSI report to the second device based on the CSI configuration, the CSI report including auxiliary information about a transmission power adjustment for the second device.

[0008] In a fourth aspect, a method is provided. The method includes: sending channel state information, CSI, and configuration to a first device at a second device; sending a reference signal to the first device; and receiving a CSI report from the first device based on the CSI configuration, the CSI report including auxiliary information about transmission power adjustment for the second device.

[0009] In a fifth aspect, a first device is provided. The first device includes: a component for receiving channel state information, CSI, and configuration from a second device; and a component for sending a CSI report to the second device based on the CSI configuration in response to receiving a reference signal from the second device, wherein the CSI report includes auxiliary information about transmission power adjustment for the second device.

[0010] In a sixth aspect, a second device is provided. The second device includes: a component for sending channel state information, CSI, and configuration to a first device; sending a reference signal to the first device; and receiving a CSI report based on the CSI configuration from the first device, the CSI report including auxiliary information about transmission power adjustment for the second device.

[0011] According to a seventh aspect, a computer-readable medium is provided, on which a computer program is stored. When the computer program is executed by at least one processor of a device, the device implements the method according to the third aspect.

[0012] In an eighth aspect, a computer-readable medium is provided, on which a computer program is stored. When the computer program is executed by at least one processor of the device, the device implements the method described in the fourth aspect.

[0013] Other features and advantages of embodiments of the present disclosure will also be apparent from the following description of specific embodiments when read in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Embodiments of the present disclosure are presented in an exemplary sense and their advantages are explained in more detail below with reference to the accompanying drawings, in which

[0015] Figure 1 An example network system is shown in which example embodiments of the present disclosure may be implemented;

[0016] Figure 2 A signaling diagram illustrating an example process for transmission power adaptation according to some example embodiments of the present disclosure;

[0017] Figure 3 A flowchart illustrating an example method according to some example embodiments of the present disclosure;

[0018] Figure 4 A flowchart illustrating another example method according to some example embodiments of the present disclosure is shown;

[0019] Figure 5 shows a simplified block diagram of a device suitable for implementing an example embodiment of the present disclosure; and

[0020] Figure 6 A block diagram of an example computer-readable medium is shown in accordance with some embodiments of the present disclosure.

[0021] Throughout the drawings, the same or similar reference numerals refer to the same or similar elements. DETAILED DESCRIPTION

[0022] The principles of the present disclosure will now be described with reference to some example embodiments. It should be understood that these embodiments are described only for illustrative purposes, and help those skilled in the art to understand and implement the present disclosure, without implying any limitation on the scope of the present disclosure. The disclosure described herein can be implemented in various ways except for the way described below.

[0023] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0024] References in this disclosure to "one embodiment," "an embodiment," "an example embodiment," etc. indicate that the described embodiment may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes the particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an example embodiment, it is considered to be within the knowledge of those skilled in the art to affect such feature, structure, or characteristic in conjunction with other embodiments, whether or not explicitly described.

[0025] It should be understood that although the terms "first" and "second" etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish the functions of the various elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed terms.

[0026] The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the exemplary embodiments. As used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It should be further understood that the terms "include", "comprises", "has", "contains", "includes", and / or "comprising" when used herein specify the presence of stated features, elements, and / or components, etc., but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0027] As used herein, “at least one of: ” and “at least one of ” and similar expressions, where a list of two or more elements is combined by “and” or “or”, mean at least any one of the elements, or at least any two or more of the elements, or at least all of the elements.

[0028] As used in this application, the term "circuitry" may refer to one or more or all of the following: (a) hardware circuitry only implementation (such as implementation in analog and / or digital circuitry only) and (b) a combination of hardware circuitry and software such as (if applicable): (i) a combination of analog and / or digital hardware circuit(s) with software / firmware and (ii) any portion of hardware processor(s) with software (including digital signal processor(s), software, memory(s) that work together to enable a device such as a mobile phone or server to perform various functions) and (c) hardware circuit(s) and / or processor(s), such as microprocessor(s) or portion(s) of microprocessor(s) that require software (e.g., firmware) for operation (but may not be present when software is not required for operation).

[0029] This definition of circuitry applies to all uses of the term in this application, including any claims. As another example, as used in this application, the term circuitry also encompasses implementations of only a hardware circuit or processor (or multiple processors) or a portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also encompasses, for example and as applicable to a particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in a server, cellular network device, or other computing or network device.

[0030] As used herein, the term "communication network" refers to a network that complies with any suitable communication standard, such as a fifth generation (5G) system, long term evolution (LTE), advanced LTE (LTE-A), wideband code division multiple access (WCDMA), high speed packet access (HSPA), narrowband Internet of Things (NB-IoT), etc. In addition, the communication between the terminal device and the network device in the communication network can be performed according to any suitable generation communication protocol, including but not limited to the first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G) new air interface (NR) communication protocol and / or any other protocol currently known or developed in the future. The embodiments of the present disclosure can be applied to various communication systems. In view of the rapid development of communication, there will certainly be communication technologies and systems of future types that can embody the present disclosure. It should not be considered that the scope of the present disclosure is limited to the aforementioned system.

[0031] As used herein, the term "network device" refers to a node in a communication network via which a terminal device accesses the network and receives services from the network. Depending on the terminology and technology applied, a network device may refer to a base station (BS) or an access point (AP), for example, a NodeB (NodeB or NB), an evolved NodeB (eNodeB or eNB), a NR next generation NodeB (gNB), a remote radio unit (RRU), a radio frequency (RH), a remote radio head (RRH), an integrated access and backhaul (IAB) node, a relay, a low power node (such as a femto, pico, etc.). A network device is allowed to be defined as part of a gNB, for example in a CU / DU split, in which case the network device is defined as a gNB-CU or a gNB-DU.

[0032] The term "terminal device" refers to any end device capable of wireless communication. As an example and not limitation, a terminal device may also be referred to as a communication device, a user equipment (UE), a subscriber station (SS), a portable subscriber station, a mobile station (MS), or an access terminal (AT). The terminal device may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local ring phone, a tablet computer, a wearable terminal device, a personal digital assistant (PDA), a portable computer, a desktop computer, an image capture terminal device such as a digital camera, a game terminal device, a music storage and playback device, a vehicle-mounted wireless terminal device, a wireless endpoint, a mobile station, a laptop embedded device (LEE), a laptop mounted device (LME), a USB dongle, a smart device, a wireless customer premises equipment (CPE), an Internet of Things (IoT) device, a watch or other wearable device, a head mounted display (HMD), a vehicle, a drone, medical equipment and applications (e.g., remote surgery), industrial equipment and applications (e.g., robots and / or other wireless devices operating in the context of an industrial and / or automated processing chain), consumer electronic devices, equipment operating on a commercial and / or industrial wireless network, etc. The terminal device may also correspond to the mobile terminal (MT) part of an integrated access and backhaul (IAB) node (also referred to as a relay node). In the following description, the terms "terminal device", "communication device", "terminal", "user equipment" and "UE" may be used interchangeably.

[0033] Although the functions described herein may be performed in fixed and / or wireless network nodes in various example embodiments, in other example embodiments, the functions may be implemented in a user equipment device (such as a cellular phone or a tablet computer or a laptop computer or a desktop computer or a mobile IoT device or a fixed IoT device). The user equipment may, for example, be appropriately equipped with corresponding capabilities as described in conjunction with fixed and / or wireless network nodes. The user equipment device may be a user device and / or a control device configured to control the user device when installed in the user device, such as a chipset or a processor. Examples of such functions include boot server functions and / or home subscriber servers, which may be implemented in the user equipment device by providing software to the user equipment device, the software being configured to cause the user equipment device to perform from the perspective of these functions / nodes.

[0034] In practice, reducing the DL transmission power means that the modulation and coding scheme (MCS) of the scheduled resources (e.g., PRBs of PDSCH) needs to be reduced to achieve the desired target block error rate (BLER). As a result, a smaller spectral efficiency can be obtained for the UE, and in turn, a larger bandwidth can be used by the network if available. This can compensate for the spectral efficiency loss, thereby avoiding an increase in data latency. Depending on the load level, each UE can get a larger bandwidth allocation.

[0035] The UE reports CSI to provide the network with information about the current channel conditions. Based on the CSI report, the gNB performs DL channel-related scheduling accordingly, including but not limited to selecting DL transmission configuration and related parameters based on the instantaneous DL channel conditions (including interference conditions). For example, the gNB's link adaptation determines the appropriate MCS and the number of multiple-input multiple-output (MIMO) layers for the UE. The gNB can optimize the transmission parameters itself based on the CSI report and enable information about the actual MCS used for downlink shared channel (DL-SCH) transmissions and the PRB set used for transmission to always be included in the downlink scheduling assignment.

[0036] CSI includes one or more information. Specifically, the CSI report in 5G NR may include: Channel Quality Information (CQI), which indicates the highest MCS, which, if used, means that a DL-SCH transmission using the recommended Rank Indicator (RI) and Precoding Matrix Indicator (PMI) will typically be received with a block error probability of at most 10%; ● PMI, which indicates the preferred precoder for DL-SCH transmission, which is conditional on the number of layers indicated by RI. The recommended precoder is not explicitly signaled, but is provided as an index into a set of predefined matrices (the so-called codebook); ● CSI-RS Resource Indicator (CRI), which indicates the beam preferred by the UE if the device is configured to monitor multiple beams; SS / PBCH resource block indicator (SSBRI); A layer indicator (LI) which identifies the strongest layer from the set of layers indicated by the reported RI; ●RI, which provides a recommendation on the transmission rank to be used, indicating the number of MIMO layers, i.e., the number of independent communication channels that should preferably be used for PDSCH transmission to the device. To calculate the RI, the UE calculates the singular values ​​of the channel covariance matrix, and the rank is the number of singular values ​​greater than a certain predetermined threshold. The rank indicates the number of relatively uncorrelated data streams that can be spatially multiplexed through the MIMO channel between the transmit antenna and the receive antenna. The singular value indicates the power of each stream. If the number of transmit antennas and the number of receive antennas are the same, the maximum RI is the number of antennas on each side. If the number of transmit antennas and the number of receive antennas are different, the maximum achievable RI is equal to the smaller of the two numbers; ●Layer 1 reference signal received power (L1-RSRP), which as part of the support for beam management reflects the fact that the report does not include filtering applied to the longer term (e.g., layer 3 or L3) of the high-level RSRP report. The L1-RSRP used for beam management can be based on measurements of a set of SS blocks or a set of CSI-RS. In case of CSI-RS based L1-RSRP measurement, the CSI-RS shall be limited to single-port or dual-port CSI-RS. In the latter case, the reported L1-RSRP shall be the linear average of the L1-RSRP measured on each port; ●Synchronization Signal Reference Signal Received Power (SS-RSRP), which is defined to depend on SS-PBCH-BlockPower. In addition, the CSI-RS power can be derived from SS-PBCH-BlockPower and powerControlOffsetSS. SS-PBCH-BlockPower is defined as part of ServingCellConfigCommon (which is part of SIB1) and is in the range of [-60:50] dBm. powerControlOffsetSS is defined as the power offset of NZP CSI-RS RE to SSS RE and is part of NCP-CSI-RS-Resource and can be set to [3,0,3,6] dB.

[0037] Currently, the power offset between PDSCH and channel state information reference signal (CSI-RS), which is also referred to as powercontrolOffset in relevant standards, is notified to the UE via radio resource control (RRC) signaling. In fact, the configured value of powercontrolOffset is the assumed ratio used to derive CSI feedback at the UE. However, in some cases, the transmission power of PDSCH may change, while the transmission power of CSI-RS may not change accordingly. For example, if the CSI-RS resources are shared with more than one UE, the transmission power of CSI-RS may not change. Therefore, the actual power offset between PDSCH and CSI-RS may be quite different from the configured value of powercontrolOffset. This affects the CSI feedback from the UE because the UE assumes that the power offset ratio between the PDSCH energy per resource element (EPRE) and the CSI-RS RE is very different from the power offset between PDSCH and CSI-RS that the UE actually experiences.

[0038] Although the gNB can compensate for e.g. L1-RSRP and / or CQI reporting based on the transmit power difference between the actual setting and the nominal setting, such compensation may not be very accurate. In particular, in addition to CQI and L1-RSRP, a change in transmit power may also affect the RI or PMI from the UE (for which the gNB may have significant difficulties compensating). Furthermore, a reduction in transmit power may result in a reduction in the number of supported MIMO layers. This is counterproductive as it may significantly reduce spectral efficiency and, therefore, increase data latency and overall network energy consumption.

[0039] To address the above and other potential problems, embodiments of the present disclosure provide a transmission power adaptation mechanism. In the power adaptation mechanism, the UE can provide auxiliary information to the network via CSI reports for adjusting the transmission power and / or bandwidth allocation. The auxiliary information indicates how the transmission power reduction affects the communication quality and performance on the UE side, for example, the number of supported MIMO layers, i.e., RI. In this way, the network benefits from determining the maximum transmission power reduction that can be applied to the UE without degrading the supported MIMO layers.

[0040] Figure 1 1 shows an example network system 100 in which example embodiments of the present disclosure may be implemented. Figure 1 As shown, the communication network 100 may include a first device 110 and a second device 120. The first device 110 may be a terminal device (e.g., UE). The second device 120 may be a network device (e.g., gNB) serving a terminal device (e.g., the first device 110) located in the cell 102.

[0041] The network system 100 is a MIMO system that uses multiple transmit antennas and multiple receive antennas to increase the capacity of the radio system and improve data transmission efficiency. Based on the transmission rank used in the network system 100, the first device 110 can communicate with the second device 120 via different unrelated data streams, which are spatially multiplexed through a set of communication channels 130-1 to 130-N (e.g., MIMO channels) between the transmit antenna and the receive antenna. The number of communication channels 130-1 to 130-N may depend on the MIMO layer of the first device 110. In addition, the number of communication channels 130-1 to 130-N may be indicated by RI.

[0042] The first device 110 may measure the DL RS, such as the CSI-RS in the RRC connected mode, to obtain the CSI. The first device 110 may then send a CSI report to the second device 120. Since the CSI report reflects the current channel conditions, the second device 120 may schedule UL transmissions, implement beam management, and adjust DL transmission power and bandwidth based on the CSI report.

[0043] To this end, the second device 120 may provide the CSI configuration to the first device 110 in advance. For example, the CSI configuration may be sent in an RRC message. In the context of the present disclosure, the term "CSI configuration" refers to parameters or information for CSI measurement and reporting, which may include but is not limited to CSI-MeasConfig information element (IE), CSI-ReportConfig IE, etc. CSI-MeasConfig IE is defined for setting CSI resources.

[0044] The CSI-MeasConfig IE may configure a power offset of a DL data transmission (e.g., PDSCH RE) to a CSI-RS transmission (e.g., NZP CSI-RS RE). Such a power offset may be implemented in the powercontrolOffset IE. In some example embodiments, another power offset may be provided, which is a power offset of a DL data transmission (e.g., PDSCH RE) to a CSI-RS transmission (e.g., NZP CSI-RS RE), which corresponds to a maximum transmission power reduction (e.g., -10 db, hereinafter also referred to as maxpowercontrolOffset) that the network may apply to dynamic PDSCH transmission power adaptation. For example, in the case where dynamic transmission power or bandwidth adaptation is applied, another power offset in addition to the power offset may be provided. In the following description, the another power offset and the power offset may be referred to as a first power offset and a second power offset, respectively.

[0045] The CSI-ReportConfig IE is defined to set configurations related to CSI reporting, such as CSI reporting granularity in the frequency domain. In some example embodiments, the CSI-ReportConfig IE may include a reportFreqConfiguration IE that is differentiated at least for CQI. Thus, the first device 110 is configured to report, for example, a first CQI measured at a first power offset on a wideband and / or a second CQI measured at a second power offset on at least one subband.

[0046] When reporting CSI, in addition to parameters such as CQI, PMI, RI, etc., the first device 110 can also provide the second device 120 with auxiliary information about transmission power adjustment, which will be discussed in detail below. The second device 120 can then perform transmission power / bandwidth adaptation for DL ​​resource (e.g., DL-SCH resource) allocation based on the auxiliary information. In this case, the first device 110 can apply transmission power / bandwidth adaptation accordingly, for example, to guide the assumed power offset ratio between PDSCH and NZP CSI-RS for derivation of CSI feedback.

[0047] It should be understood that Figure 1 The number of network devices and terminal devices shown is given for illustrative purposes and does not imply any limitation. Communication network 100 may include any suitable number of network devices and terminal devices.

[0048] Depending on the communication technology, the communication network 100 can be a code division multiple access (CDMA) network, a time division multiple access (TDMA) network, a frequency division multiple access (FDMA) network, an orthogonal frequency division multiple access (OFDMA) network, a single carrier frequency division multiple access (SC-FDMA) network, or any other network. The communication discussed in the network 100 can meet any suitable standard, including but not limited to new air interface (NR), long term evolution (LTE), LTE evolution, LTE advanced (LTE-A), wideband code division multiple access (WCDMA), code division multiple access (CDMA), cdma2000, and global mobile communication system (GSM), etc. In addition, communication can be performed according to any generation of communication protocols currently known or developed in the future. Examples of communication protocols include but are not limited to first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G) communication protocols. The technology described herein can be used for the above-mentioned wireless network and radio technology as well as other wireless networks and radio technologies. For clarity, certain aspects of the techniques are described below for LTE, and LTE terminology is used in much of the description below.

[0049] Reference below Figures 2 to 4The principles and embodiments of the present invention are described in detail. Figure 2 A signaling diagram illustrating an example process 200 for transmission power adaptation according to some example embodiments of the present disclosure is shown. The process 200 may involve the following: Figure 1 The first device 110 and the second device 120 are shown. For the purpose of discussion, reference will be made to Figure 1 Process 200 is described.

[0050] In process 200, the first device 110 may communicate in RRC_Connected mode with the second device 120. The second device 120 may be able to apply dynamic power adjustment for DL ​​transmissions and may increase bandwidth with reduced transmission power or vice versa.

[0051] In some embodiments, the second device 120 may determine 205 to apply a transmit power adaptation or a bandwidth adaptation. As an example, the transmit power / bandwidth adaptation may include a DL transmit power reduction, and thus the actual power offset between PDSCH and CSI-RS may be changed.

[0052] The second device 120 may send 210 at least one CSI configuration to the first device 110. For example, the CSI configuration may be sent in an RRC message (e.g., an RRC setup message). In some example embodiments, the CSI configuration may include, but is not limited to, a CSI-MeasConfig IE, a CSI-ReportConfig IE, and the like. In particular, the CSI-MeasConfig IE may include a powercontrolOffset IE indicating a power offset of a DL data transmission (e.g., a PDSCH RE) to a reference signal transmission (e.g., an NZP CSI-RS RE). The CSI-ReportConfig IE may include a reportFreqConfiguration IE that is differentiated at least for CQI.

[0053] Due to power / bandwidth adaptation, the actual power offset experienced by the first device 110 may be different from the indicated power offset. In some embodiments, the CSI-MeasConfig IE may also include an additional power offset of PDSCH RE to NZP CSI-RS RE corresponding to a maximum transmission power reduction (e.g., -10db) that the second device 120 may use for dynamic PDSCH transmission power adaptation, also referred to as maxpowercontrolOffset.

[0054] In the context of the present disclosure, maxpowercontroloffset or additional power offset may also be referred to as a first power offset, and the indicated power offset may also be referred to as a second power offset. However, it should be understood that the solution provided by the present disclosure is also applicable to power offsets corresponding to average power reduction, expected power reduction, etc. Therefore, in some other embodiments, the term "first power offset" may be determined based on average power reduction, expected power reduction, etc. The scope of the present disclosure is not limited in this regard.

[0055] In some embodiments where the CSI configuration includes a first power offset, the first device 110 is configured to report at least one of a first CQI or a second CQI based on the CSI-ReportConfig IE, wherein the first CQI is measured based on the first power offset and the second CQI is measured based on the second power offset. Additionally or alternatively, in some embodiments, if the second device 120 indicates transmission power adaptation, the first device 110 may always apply wideband reporting regardless of the configuration provided in the RRC signaling. In other words, even if subband reporting is configured in the CSI configuration, it is assumed that wideband reporting is applied.

[0056] To enable gNB dynamic PDSCH power adjustment, multiple power offset adjustment values ​​may be provided to the UE for use in the network. To this end, in some embodiments, the CSI configuration may include PDSCH power adjustment information, for example, a set of candidate power offset adjustment values ​​[-6dB, -3dB, 0, 1dB, 3dB, 6dB]. The network may dynamically indicate one of those values ​​for PDSCH power adjustment, which will be discussed later.

[0057] The second device 120 then sends 215 a reference signal (eg, CSI-RS) to the first device 110. The first device 110 may measure the reference signal to determine channel condition parameters such as CQI, RI, PMI, etc. These channel condition parameters may be included in a CSI report.

[0058] In the context of the present disclosure, the CQI measured based on the first power offset may also be referred to as the first CQI. The CQI measured based on the second power offset may also be referred to as the second CQI. In addition, the CQI reduced by 1 that the first device 110 can support at the indicated RI may be referred to as the third CQI.

[0059] In order to assist the network in transmission power adjustment and / or bandwidth allocation, the CSI report can be extended to provide auxiliary information. In some embodiments, the auxiliary information can indicate how much margin the first device 110 has above the noise floor level given a BLER target of, for example, 10%. The margin can be in dB and reflected in, for example, the difference between the signal to interference plus noise ratio (SINR) at the CQI and the noise floor. This auxiliary information can have at least one of the following forms: ● a first CQI measured based on a first power offset, a first signal to interference plus noise ratio (SINR) increment parameter, i.e., a first SINR increment, which may be a SINR difference between a first CQI measured based on the first power offset and a fourth CQI corresponding to a predefined CQI index, such as CQI index 0, wherein CQI index 0 is considered to be the most robust CQI index, A second SINR increment parameter, ie, a second SINR increment, may be a SINR difference between the second CQI and the fourth CQI measured based on a second power offset.

[0060] In this case, the CQI can be determined based on the SINR increment, that is, the value of the SINR increment is mapped to the CQI index. The network can use this SINR increment to determine the maximum PDSCH transmission power reduction that can be applied by the network without reducing the number of MIMO layers. The reduction in transmission power may not exceed the margin indicated by the SINR increment to ensure good demodulation performance at the UE.

[0061] In some embodiments, the auxiliary information may include RI information indicating whether or when the transmission power reduction affects the indicated RI. Such auxiliary information may have at least one of the following forms: ● an indication of whether the first device 110 is capable of maintaining the indicated RI at a first power offset, ● a maximum reduced power offset value at which the first device 110 is capable of maintaining the indicated RI, ● a power offset value that the first device 110 will support of the indicated RI minus 1 (i.e., 1 less MIMO layer than indicated), • A third CQI that the first device 110 will support at the indicated RI minus one.

[0062] For example, the indicated first value may indicate that the first device 110 can maintain the indicated RI at the first power offset. Additionally, the indicated second value may indicate that the first device 110 cannot maintain the indicated RI at the first power offset.

[0063] The maximum reduced power offset value at which the first device 110 can maintain the indicated RI may depend on how far above the noise floor the weakest layer of the first device 110 is. In the case of rank 1, this is equal to the first SINR delta.

[0064] In some embodiments, the first device 110 may generate 220 a CSI report including auxiliary information regarding a transmission power adjustment for the second device 120. In some embodiments, the transmission power adjustment may relate to the number of MIMO layers indicated by the RI supported by the first device 110. The number of MIMO layers or the RI may affect the number of communication channels 130-1 to 130-N supported by the first device 110.

[0065] Then, the first device 110 sends 225 a CSI report to the second device 120 based on the CSI configuration.

[0066] In some embodiments, upon receiving the CSI report, the second device 120 may determine 230 a transmission power or bandwidth adaptation for DL ​​resource allocation accordingly. As an example, the second device 120 may determine at least one of a target transmission power or a target bandwidth for transmission power adjustment based on the auxiliary information so that the number of communication channels 130-1 to 130-N supported by the first device 110 is not reduced. As another example, the reduction level of the transmission power may be determined so that the first device 110 always operates above its noise floor level. For example, as reported by the first device 110, the applied reduction in dB is never lower than the first SINR increment in dB.

[0067] In the event that the CSI configuration includes a set of candidate power offset adjustment values, the second device 120 may select a target power offset adjustment value corresponding to at least one of the target transmission power or the target bandwidth from the set of candidate power offset adjustment values. The second device 120 may then send 235 an indication of the target power offset adjustment value to the first device 110. For example, the indication of the target power offset adjustment value may be sent via a DCI, a MAC CE, or a DL grant.

[0068] Upon receiving the indication, the first device 110 may apply 240 the power offset adjustment value on top of the power offset configured via the powercontrolOffset IE. In particular, the first device 110 may steer a power offset ratio between PDSCH and NZP CSI-RS when deriving CSI feedback.

[0069] In some embodiments, the first device 110 may determine the third power offset based on the second power offset and the indicated power offset adjustment value. Upon receiving another reference signal, the first device 110 may send another CSI report to the second device 120, and in this case, the another CSI report includes at least one channel condition parameter measured based on the third power offset.

[0070] It should be understood that some steps in process 200 are optional or can be omitted, and the order of the steps is given for illustrative purposes. For example, step 205 may be optional for process 200. In some embodiments, step 205 may be omitted or performed in parallel with other steps. Therefore, the embodiments of the present disclosure are not limited in this regard.

[0071] According to an example embodiment of the present disclosure, CSI reporting is enhanced in providing auxiliary information for transmit power adaptation. Based on the auxiliary information, the gNB knows how a transmit power reduction will affect the number of supported MIMO layers or the RI. Therefore, the gNB can determine the maximum transmit power reduction that can be applied to the UE without reducing the supported MIMO layers. In this way, spectral efficiency is improved through transmit power and bandwidth adaptation while reducing data latency and overall network energy consumption.

[0072] Figure 3 A flowchart of an example method 300 according to some example embodiments of the present disclosure is shown. The method 300 may be performed on a terminal device (e.g., a reference Figure 1 For the purpose of discussion, reference will be made to Figure 1 Method 300 is described.

[0073] At 310, the first device 110 receives a CSI configuration from the second device 120. In some embodiments, the CSI configuration may be received in an RRC message.

[0074] At 320, the first device 110 determines whether a reference signal is received from the second device 120. If the reference signal is received, at 330, the first device 110 sends a CSI report to the second device 120 based on the CSI configuration. The CSI report may include auxiliary information about transmission power adjustment for the second device 120.

[0075] In some example embodiments, the transmission power adjustment may relate to the number of MIMO layers supported by first device 110 or the RI supported by first device 110. The number of MIMO layers or the RI may affect the number of communication channels 130-1 to 130-N supported by first device 110.

[0076] In some example embodiments, the CSI configuration may include a CSI measurement configuration that includes a first power offset corresponding to a maximum transmission power reduction supported by the second device 120 and a second power offset between a transmission power of data transmission from the second device 120 and a transmission power of a reference signal. In other words, the first power offset is an additional power offset of the PDSCH RE to the NZP CSI-RS RE corresponding to a maximum transmission power reduction (e.g., 10 dB) that the network can use for dynamic PDSCH transmission power adaptation. Therefore, it may also be referred to as maxpowercontrolOffset. From the first power offset, the first device 110 is able to determine how much margin it has above the noise floor level given a BLER target of, for example, 10%.

[0077] In some example embodiments, first device 110 may determine whether the CSI measurement configuration includes a first power offset. If the CSI measurement configuration includes the first power offset, first device 110 may send a CSI report including one of: a first CQI measured based on the first power offset, or a second CQI measured based on the second power offset.

[0078] In some example embodiments, if the CSI measurement configuration includes a first power offset, first device 110 may send a CSI report including a first CQI measured based on the first power offset and a second CQI measured based on a second power offset.

[0079] In some example embodiments, the first power offset may correspond to wideband reporting of the first CQI.

[0080] In some example embodiments, if second device 120 indicates transmission power adaptation, first device 110 may always use wideband reporting regardless of the configuration provided via RRC signaling. In particular, second device 120 may determine whether the CSI measurement configuration includes a first power offset. If the CSI measurement configuration includes the first power offset, first device 110 may send a CSI report including a wideband CQI regardless of the CSI reporting configuration.

[0081] In some example embodiments, the CSI configuration may include a CSI reporting configuration (eg, CSI-ReportConfig IE) including a reporting configuration associated with a first power offset, and the first power offset corresponds to a maximum transmission power reduction supported by the second device 120 .

[0082] In some example embodiments, the CSI configuration may include a second power offset between a transmission power of a data transmission from second device 120 and a transmission power of a reference signal. The assistance information may indicate a margin above a noise floor level at a predetermined BLER (e.g., 10%) for first device 110. In these embodiments, the assistance information may include at least one of the following: a first CQI measured based on a first power offset corresponding to a maximum transmission power reduction supported by the second device 120, a first SINR increment parameter (e.g., SINR increment 1) determined based on a first CQI and a fourth CQI, the first CQI being measured based on the first power offset, the fourth CQI corresponding to a predetermined channel quality indicator index, or • A second SINR increment parameter (eg, SINR increment 2) determined based on a second CQI and a fourth CQI, the second CQI being based on a second power offset measurement.

[0083] Additionally, in some embodiments, the predetermined CQI index may be CQI index 0, where CQI index 0 is the most robust CQI index.

[0084] In some example embodiments, the CSI report may further include a first RI supported by first device 110 based on a second power offset between a transmission power of a data transmission from second device 120 and a transmission power of a reference signal (e.g., CSI-RS). The CSI configuration may include a first power offset corresponding to a maximum transmission power reduction supported by second device 120. In these embodiments, the auxiliary information may include RI information including at least one of the following: The first device 110 indicates whether the first RI is supported based on the first power offset, a maximum reduced power offset for the first device 110 to support the first RI, ● a power offset value for the first device 110 to support a second RI, wherein the second RI is one level lower than the first RI, or • A third CQI measured by the first device 110 based on the second RI.

[0085] In some example embodiments, the CSI configuration may include a set of candidate power offset adjustment values. For example, the CSI configuration may be an RRC-level configuration including PDSCH power adjustment information for configuring a set of power offset adjustment values. The set of power offset adjustment values ​​may be, for example, [-6dB, -3dB, 0,1dB, 3dB, 6dB]. Additionally, in an embodiment, the first device 110 may receive from the second device 120 an indication of one of the set of candidate power offset adjustment values ​​to be used for transmission power adjustment. In other words, the second device 120 may dynamically indicate one of the values ​​to be used for PDSCH power adjustment.

[0086] In some example embodiments, the indication may be received in at least one of a DCI, a MAC CE, or a DL grant.

[0087] In some example embodiments where the CSI configuration may include a second power offset between a transmit power of a data transmission from second device 120 and a transmit power of a reference signal, first device 110 may determine a third power offset based on the second power offset and the indicated power offset adjustment value. First device 110 may receive another reference signal from second device 120. First device 110 may send to second device 120 another CSI report including at least one channel condition parameter measured based on the third power offset.

[0088] In some example embodiments, the first device 110 may include a terminal device (e.g., a UE). Additionally or alternatively, the second device 120 may include a network device (e.g., a gNB).

[0089] Figure 4 A flowchart of an example method 400 according to some example embodiments of the present disclosure is shown. The method 400 may be performed on a network (e.g., with reference to Figure 1 For the purpose of discussion, reference will be made to Figure 1 Method 400 is described.

[0090] At 410, second device 120 sends a CSI configuration to first device 110. In some example embodiments, the CSI configuration may be sent in an RRC message.

[0091] At 420, the second device 120 sends a reference signal to the first device 110. For example, in the case where the first device 110 is in the RRC_Connected mode, the reference signal may be a CSI-RS.

[0092] At 430 , the second device 120 receives a CSI report from the first device 110 based on the CSI configuration. The CSI report includes auxiliary information regarding transmission power adjustment for the second device 110 .

[0093] In some example embodiments, the transmission power adjustment may relate to the number of MIMO layers supported by first device 110, or the RI supported by first device 110. The number of MIMO layers or the RI may affect the number of communication channels 130-1 to 130-N supported by first device 110.

[0094] In some example embodiments, the CSI configuration may include a CSI measurement configuration including a first power offset corresponding to a maximum transmission power reduction supported by the second device 120 and a second power offset between a transmission power of data transmission from the second device 120 and a transmission power of a reference signal. For example, the CSI measurement configuration may be a CSI-MeasConfig IE. In this case, in addition to the powerControlOffset IE indicating the second power offset of the PDSCH RE to the NZP CSI-RS RE, an additional powerControlOffset IE indicating a first power offset of the PDSCH RE to the NZP CSI-RS RE corresponding to the maximum transmission power reduction that the second device 120 can use for dynamic PDSCH transmission power adaptation is implemented in the CSI-MeasConfig IE. The value of the first power offset may be, for example, -10 dB, also referred to as the maxpowercontrolOffset IE.

[0095] In some example embodiments, the CSI configuration may include a CSI reporting configuration including a reporting configuration associated with a first power offset, and the first power offset may correspond to a maximum transmission power reduction supported by the second device 120. For example, the CSI reporting configuration may be a CSI-ReportCongifIE including a reportFreqConfiguration IE that is differentiated at least for CQI. In this case, the first device 110 is configured to report a first CQI measured on a wideband based on the first power offset, and additionally, report a second CQI measured on a subband based on the second power offset.

[0096] In some example embodiments, second device 120 may receive a CSI report including at least one of: a first CQI measured based on the first power offset, or a second CQI measured based on the second power offset.

[0097] The CSI measurement configuration and the CSI reporting configuration may be sent in an RRC message. For example, both configurations may be configured in the RRC connection establishment process via an RRC setup message.

[0098] In some example embodiments, if the second device indicates that transmit power adaptation is applied, the first device 110 may always use wideband reporting granularity regardless of the CSI reporting configuration provided via RRC signaling.

[0099] In some example embodiments, the first power offset may correspond to wideband reporting of the first CQI.

[0100] In some example embodiments, the auxiliary information may include information about a margin above a noise floor level at a predetermined block error rate.

[0101] In some example embodiments, the auxiliary information may include at least one of the following: • a first CQI measured based on a first power offset corresponding to a maximum transmission power reduction supported by the second device 120; ● A first SINR increment parameter determined based on a first CQI and a fourth CQI, wherein the first CQI is measured based on a first power offset, and the fourth CQI corresponds to a predetermined channel quality indicator index, or ● A second SINR increment parameter determined based on a second CQI and a fourth CQI, wherein the second CQI is measured based on a second power offset.

[0102] Additionally, in some embodiments, the predetermined CQI index may be CQI index 0, where CQI index 0 is the most robust CQI index.

[0103] In the context of the present disclosure, such an SINR parameter may also be referred to as an SINR delta. The network may use the SINR delta to determine the maximum PDSCH transmission power reduction that may be applied compared to the additional powercontrolOffset. The reduction may not be reduced more than the reported margin (i.e., SINR delta) to ensure good demodulation performance at the UE.

[0104] In some example embodiments, first device 110 may provide additional RI information indicating whether or when a transmit power reduction affects the RI indicated by second device 120. In these embodiments, the CSI report may also include a first RI supported by first device 110 based on a second power offset between a transmit power of a data transmission from second device 120 and a transmit power of a reference signal. The CSI configuration may include a first power offset corresponding to a maximum transmit power reduction supported by second device 120. Additionally, the auxiliary information may include RI information including at least one of: ● an indication of whether the first device 110 supports the first RI based on the first power offset; as an example, a first value of the indication may indicate that the first device 110 supports the first RI based on the first power offset, and a second value of the indication may indicate that the first device 110 does not support the first RI based on the first power offset; ● a maximum reduced power offset for the first device to support the first RI, ● a power offset value for the first device to support a second RI, the second RI being one level lower than the first RI, or • A third CQI measured by the first device based on the second RI.

[0105] Based on the indicated value, the second device 120 may know whether the first device 110 can maintain the indicated RI at the first power offset. The maximum reduced power offset value at which the first device 110 can maintain the indicated RI may depend on the margin of the weakest layer of the first device 110 above the noise floor. In the case of rank 1, the maximum reduced power offset may be equal to the SINR delta.

[0106] In some example embodiments where dynamic PDSCH power adjustment is applied, multiple power offset adjustment values ​​may be configured to the UE and used in the network. To this end, the CSI configuration may include a set of candidate power offset adjustment values ​​for the first device 110. The CSI configuration may be an RRC level configuration including PDSCH power adjustment information (e.g., a set of candidate power offset adjustment values ​​[-6dB, -3dB, 0, 1dB, 3dB, 6dB]). In these embodiments, the second device 120 may send an indication of one of the candidate power offset adjustment values ​​from the set of candidate power offset adjustment values ​​to be used for transmission power adjustment to the first device 110.

[0107] In the above example, the network then dynamically indicates one of the values ​​[-6dB, -3dB, 0, 1dB, 3dB, 6dB] for PDSCH power adjustment, for example, via DCI or MAC CE. As an example, the indicated value (also referred to as a target power offset adjustment value) may be included in the DL grant. Thus, the first device 110 may apply the indicated PDSCH power adjustment value (which may be received via DCI or MAC CE over the configured powerControlOffset) to guide the assumed power offset ratio delta difference between the PDSCH EPRE and the NZP CSI-RS EPRE when deriving CSI feedback.

[0108] The serving gNB or cell may determine and provide an extended CSI configuration for the UE. The gNB may then perform dynamic PDSCH power adjustment for the UE based on the extended CSI report received from the UE. The transmit power reduction level is determined such that the transmit power reduction level always operates the UE above the noise floor level for the UE. For example, the applied reduction in dB is never lower than the SINR delta in dB reported by the UE.

[0109] Accordingly, in some embodiments, the second device 120 may determine at least one of a target transmission power and a target bandwidth for transmission power adjustment based on the auxiliary information, so that the number of communication channels is supported by the first device 110. The second device 120 may select a target power offset adjustment value corresponding to at least one of the target transmission power or the target bandwidth from a set of candidate power offset adjustment values. Then, the second device 120 may send an indication of the target power offset adjustment value to the first device 110.

[0110] In some example embodiments, the indication may be sent in one of a DCI, a MAC CE, or a DL grant.

[0111] In some example embodiments, second device 120 may send another reference signal corresponding to the third power offset to first device 110. The third power offset is determined based on the indicated power offset adjustment value and the second power offset indicated in the CSI configuration. Second device 120 may receive another CSI report from first device 110, the another CSI report including at least one channel condition parameter measured based on the third power offset.

[0112] In some example embodiments, the first device 110 may include a terminal device (e.g., a UE). Additionally or alternatively, the second device 120 may include a network device (e.g., a gNB).

[0113] According to an embodiment of the present disclosure, the UE is able to provide effective feedback or auxiliary information for adjustment of the transmission power and / or joint adjustment of the transmission power and bandwidth in the CSI report. This allows the network to know how the reduction in transmission power will affect the reception performance at the UE, for example, the number of supported MIMO layers, i.e., RI. Therefore, the maximum transmission power reduction that can be applied without degrading the supported MIMO layers can be determined. Through the transmission power adaptation mechanism, the spectrum efficiency is improved, and the data delay and overall network energy consumption are reduced.

[0114] In some example embodiments, the first device (e.g., first device 110) capable of performing method 300 may include a component for performing the corresponding steps of method 300. The component may be implemented in any suitable form. For example, the component may be implemented in a circuit system or a software module. In some embodiments, the component may include at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to cause execution of the device together with the at least one processor.

[0115] In some example embodiments, the first device further includes: a component for receiving channel state information, CSI, and configuration from the second device; and a component for sending a CSI report to the second device based on the CSI configuration in response to receiving a reference signal from the second device, the CSI report including auxiliary information about a transmission power adjustment for the second device.

[0116] In some example embodiments, the transmission power adjustment is related to the number of multiple-input multiple-output layers supported by the first apparatus or a rank indicator supported by the first apparatus.

[0117] In some example embodiments, the channel state information configuration includes a channel state information measurement configuration including a first power offset corresponding to a maximum transmission power reduction supported by the second device and a second power offset between a transmission power of a data transmission from the second device and a transmission power of a reference signal.

[0118] In some example embodiments, a component for sending a channel state information report: a component for sending a channel state information report including one of the following based on a determination that a channel state information measurement configuration includes a first power offset: a first channel quality indicator based on the first power offset measurement, a second channel quality indicator based on the second power offset measurement.

[0119] In some example embodiments, the component for sending a channel state information report is: a component for sending a channel state information report including a first channel quality indicator based on the first power offset measurement and a second channel quality indicator based on the second power offset measurement based on the determination of the channel state information measurement configuration including a first power offset.

[0120] In some example embodiments, the first power offset corresponds to wideband reporting of the first channel quality indicator.

[0121] In some example embodiments, the auxiliary information includes information about a margin above a noise floor level at a predetermined block error rate.

[0122] Preferably, the auxiliary information includes at least one of the following: a first channel quality indicator measured based on a first power offset corresponding to a maximum transmission power reduction supported by the second device, ● A first signal to interference plus noise ratio incremental parameter determined based on a first channel quality indicator and a fourth channel quality indicator, wherein the first channel quality indicator is measured based on the first power offset, and the fourth channel quality indicator corresponds to a predetermined channel quality indicator index, or ● A second signal to interference plus noise ratio incremental parameter determined based on a second channel quality indicator and a fourth channel quality indicator, wherein the second channel quality indicator is measured based on the second power offset.

[0123] In some example embodiments, the channel state information report also includes a first rank indicator supported by the first device based on a second power offset between a transmission power of a data transmission from the second device and a transmission power of a reference signal, the channel state information configuration including the first power offset corresponding to a maximum transmission power reduction supported by the second device. The auxiliary information includes rank indicator information, the rank indicator information including at least one of the following: ● a first indication that the first apparatus supports the first rank indicator based on the first power offset, or a second indication that the first apparatus does not support the first rank indicator based on the second power offset, ● a maximum reduced power offset for the first device to support the first rank indicator, ● a power offset value for the first device to support a second rank indicator, the second rank indicator being one level lower than the first rank indicator, or • A third channel quality indicator measured by the first device based on the second RI.

[0124] In some example embodiments, the channel state information configuration includes a set of candidate power offset adjustment values. The first apparatus further includes means for receiving, from the second apparatus, an indication of one of the set of candidate power offset adjustment values ​​to be used for transmission power adjustment.

[0125] In some example embodiments, the indication is received in one of: ● Downlink control information, ● Media Access Control element, or ●Downlink authorization.

[0126] In some example embodiments, the channel state information configuration includes a second power offset between a transmission power of a data transmission from the second device and a transmission power of a reference signal. The first device also includes: means for determining a third power offset based on the second power offset and the indicated power offset adjustment value; means for receiving another reference signal from the second device; and means for sending another channel state information report to the second device, the another channel state information report including at least one channel condition parameter measured based on the third power offset.

[0127] In some example embodiments, the channel state information configuration is received in a radio resource control message.

[0128] In some example embodiments, the first apparatus further comprises a terminal device, and the second apparatus comprises a network device.

[0129] In some example embodiments, the second device (e.g., second device 120) capable of performing method 400 may include a component for performing the corresponding steps of method 400. The component may be implemented in any suitable form. For example, the component may be implemented in a circuit system or a software module. In some embodiments, the component may include at least one processor and at least one memory including computer program code. The at least one memory and the computer program code are configured to cause execution of the device together with the at least one processor.

[0130] In some example embodiments, the second device includes: a component for sending a channel state information (CSI) configuration to the first device; a component for sending a reference signal to the first device; and a component for receiving a CSI report from the first device based on the CSI configuration, the CSI report including auxiliary information about a transmission power adjustment for the second device.

[0131] In some example embodiments, the transmission power adjustment is related to the number of multiple-input multiple-output layers supported by the first apparatus or a rank indicator supported by the first apparatus.

[0132] In some example embodiments, the channel state information configuration includes a channel state information measurement configuration including a first power offset corresponding to a maximum transmission power reduction supported by the second device and a second power offset between a transmission power of a data transmission from the second device and a transmission power of a reference signal.

[0133] In some example embodiments, the component for receiving a channel state information report includes: a component for receiving a channel state information report, the channel state information report including at least one of the following: a first channel quality indicator based on a first power offset measurement, a second channel quality indicator based on a second power offset measurement.

[0134] In some example embodiments, the first power offset corresponds to wideband reporting of the first channel quality indicator.

[0135] In some example embodiments, the auxiliary information includes information about a margin above a noise floor level at a predetermined block error rate.

[0136] In some example embodiments, the auxiliary information includes at least one of the following: a first channel quality indicator measured based on a first power offset corresponding to a maximum transmission power reduction supported by the second device, ● A first signal to interference plus noise ratio incremental parameter determined based on a first channel quality indicator and a fourth channel quality indicator, wherein the first channel quality indicator is measured based on the first power offset, and the fourth channel quality indicator corresponds to a predetermined channel quality indicator index, or ● A second signal to interference plus noise ratio incremental parameter determined based on a second channel quality indicator and a fourth channel quality indicator, wherein the second channel quality indicator is measured based on the second power offset.

[0137] In some example embodiments, the channel state information report also includes a first rank indicator supported by the first device based on a second power offset between a transmission power of a data transmission from the second device and a transmission power of a reference signal, the channel state information configuration including the first power offset corresponding to a maximum transmission power reduction supported by the second device. The auxiliary information includes rank indicator information, the rank indicator information including at least one of the following: ● a first indication that the first apparatus supports the first rank indicator based on the first power offset, or a second indication that the first apparatus does not support the first rank indicator based on the second power offset, ● a maximum reduced power offset for the first device to support the first rank indicator, ● a power offset value for the first device to support a second rank indicator, the first rank indicator being greater than the second rank indicator, or • A second channel quality indicator measured by the first device based on the second rank indicator.

[0138] In some example embodiments, the channel state information configuration includes a set of candidate power offset adjustment values. The second apparatus further includes means for sending an indication to the first apparatus of one of the set of candidate power offset adjustment values ​​to be used for transmission power adjustment.

[0139] In some example embodiments, the indication is sent in one of the following: ● Downlink control information, ● Media Access Control element, or ●Downlink authorization.

[0140] In some example embodiments, the component for sending an indication includes: a component for determining at least one of a target transmission power or a target bandwidth for transmission power adjustment based on auxiliary information, so that the number of communication channels is supported by the first device; a component for selecting a target power offset adjustment value corresponding to at least one of the target transmission power or the target bandwidth from a set of candidate power offset adjustment values; and a component for sending an indication of the target power offset adjustment value to the first device.

[0141] In some example embodiments, the second device further includes: a component for sending another reference signal to the first device based on a third power offset, wherein the third power offset is determined based on the indicated power offset adjustment value and the second power offset indicated in the channel state information configuration; and a component for receiving another channel state information report from the first device, the other channel state information report including at least one channel condition parameter measured based on the third power offset.

[0142] In some example embodiments, the channel state information configuration is sent in a radio resource control message.

[0143] In some example embodiments, the first apparatus comprises a terminal device and the second apparatus comprises a network device.

[0144] Figure 5 5 is a simplified block diagram of a device 500 suitable for implementing an embodiment of the present disclosure. The device 500 may be provided to implement a communication device, such as Figure 1 The first device 110 or the second device 120 shown. As shown, the device 500 includes one or more processors 510, one or more memories 520 coupled to the processor 510, and one or more transmitters and / or receivers (TX / RX) 540 (ie, communication module 540) coupled to the processor 510.

[0145] The TX / RX 540 is used for bidirectional communication. The TX / RX 540 has at least one antenna to facilitate communication. The communication interface may represent any interface necessary for communicating with other network elements.

[0146] As non-limiting examples, processor 510 may be of any type suitable for a local technology network, and may include one or more of the following: a general purpose computer, a special purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. Device 500 may have multiple processors, such as application specific integrated circuit chips that are time slaved to a clock of a synchronized main processor.

[0147] The memory 520 may include one or more non-volatile memories and one or more volatile memories. Examples of non-volatile memories include, but are not limited to, read-only memory (ROM) 524, electrically programmable read-only memory (EPROM), flash memory, hard disk, compact disk (CD), digital video disk (DVD), and other magnetic and / or optical memories. Examples of volatile memories include, but are not limited to, random access memory (RAM) 522 and other volatile memories that are not lost during the duration of a power outage.

[0148] Computer program 530 includes computer executable instructions that are executed by associated processor 510. Program 530 may be stored in ROM 524. Processor 510 may perform any suitable actions and processes by loading program 530 into RAM 522.

[0149] The embodiments of the present disclosure may be implemented with the aid of a program 530, so that the device 500 may execute the following steps: Figures 2 to 4 Any process of the present disclosure discussed. The embodiments of the present disclosure may also be implemented by hardware, or by a combination of software and hardware.

[0150] In some embodiments, the program 530 may be tangibly embodied in a computer-readable medium that may be included in the device 500 (e.g., memory 520) or in other storage devices accessible by the device 500. The device 500 may load the program 530 from the computer-readable medium to the RAM 522 for execution. The computer-readable medium may include any type of tangible, non-volatile memory, such as ROM, EPROM, flash memory, hard disk, CD, DVD, etc. Figure 6 An example of a computer readable medium 600 in the form of a CD or DVD is shown. The computer readable medium has a program 530 stored thereon.

[0151] Generally, various embodiments of the present disclosure may be implemented in hardware or dedicated circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present disclosure are shown and described as block diagrams, flow charts, or using some other graphical representations, it should be understood that, as non-limiting examples, the blocks, devices, systems, techniques, or methods described herein may be implemented in hardware, software, firmware, dedicated circuits or logic, general hardware or controllers or other computing devices, or some combination thereof.

[0152] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer executable instructions, such as computer executable instructions included in a program module executed in a device on a target real or virtual processor to implement the above referenced Figure 3 to Figure 4 Method 300 or 400 described. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. In various embodiments, the functions of program modules can be combined or split between program modules as needed. Machine executable instructions for program modules can be executed in local or distributed devices. In distributed devices, program modules can be located in both local and remote storage media.

[0153] The program code for implementing the disclosed method can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing device so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, as an independent software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0154] In the context of the present disclosure, computer program codes or related data may be carried by any suitable carrier to enable a device, apparatus or processor to perform various processes and operations as described above. Examples of carriers include signals, computer readable media, etc.

[0155] The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or devices, or any suitable combination of the foregoing. More specific examples of computer readable storage media would include an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0156] In addition, although the operations are depicted in a particular order, this should not be understood as requiring such operations to be performed in the particular order shown or in order, or performing all the operations shown to achieve the desired result. In certain cases, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be interpreted as limitations on the scope of the present disclosure, but should be interpreted as descriptions of features that may be specific to a particular embodiment. The specific features described in the context of a separate embodiment may also be implemented in combination in a single embodiment. On the contrary, the various features described in the context of a single embodiment may also be implemented in multiple embodiments individually or in any suitable sub-combination.

[0157] Although the disclosure has been described in language specific to structural features and / or methodological acts, it should be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A first device, comprising: at least one processor; as well as at least one memory storing instructions that, when executed by the at least one processor, cause the first device to at least: receiving a channel state information configuration from a second device; as well as In response to receiving a reference signal from the second device, a channel state information report is sent to the second device based on the channel state information configuration, the channel state information report including auxiliary information regarding a transmission power adjustment for the second device.

2. The first device according to claim 1, wherein: The transmission power adjustment is related to the number of multiple multiple-input multiple-output layers supported by the first device or to a rank indicator supported by the first device.

3. A first device according to claim 1, wherein the channel state information configuration includes a channel state information measurement configuration, and the channel state information measurement configuration includes a first power offset corresponding to the maximum transmission power reduction supported by the second device and a second power offset between the transmission power of the data transmission from the second device and the transmission power of the reference signal.

4. The first device of claim 3, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to send the channel state information report by: Based on a determination that the channel state information measurement configuration includes the first power offset, sending the channel state information report including one of the following: a first channel quality indicator measured based on the first power offset, A second channel quality indicator is measured based on the second power offset.

5. The first device of claim 3, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the first device to send the channel state information report by: Based on a determination that the channel state information measurement configuration includes the first power offset, sending the channel state information report including a first channel quality indicator based on the first power offset measurement and a second channel quality indicator based on the second power offset measurement.

6. The first device according to claim 4 or 5, wherein the first power offset corresponds to a wideband report of the first channel quality indicator. 7 . The first device according to claim 3 , wherein the auxiliary information includes information about a margin above a noise floor level at a predetermined block error rate.

8. The first device according to claim 7, wherein the auxiliary information comprises at least one of the following: a first channel quality indicator measured based on a first power offset corresponding to a maximum transmission power reduction supported by the second device, a first signal to interference plus noise ratio delta parameter determined based on a first channel quality indicator and a fourth channel quality indicator, the first channel quality indicator being based on the first power offset measurement, the fourth channel quality indicator corresponding to a predetermined channel quality indicator index, or A second signal to interference plus noise ratio delta parameter is determined based on a second channel quality indicator and the fourth channel quality indicator, the second channel quality indicator being based on the second power offset measurement.

9. The first device of claim 1 , wherein the channel state information report further comprises a first rank indicator supported by the first device based on a second power offset between a transmission power of a data transmission from the second device and a transmission power of the reference signal, the channel state information configuration comprising a first power offset corresponding to a maximum transmission power reduction supported by the second device, and The auxiliary information includes rank indicator information, and the rank indicator information includes at least one of the following: the first device supports a first indication of the first rank indicator based on the first power offset, or the first device does not support a second indication of the first rank indicator based on the second power offset, A maximum reduced power offset for the first device to support the first rank indicator a power offset value for the first device to support a second rank indicator, the second rank indicator being one level lower than the first rank indicator, or A third channel quality indicator measured by the first device based on the second RI.

10. The first device of claim 1, wherein the channel state information configuration comprises a set of candidate power offset adjustment values, and wherein the at least one memory and the computer program code are configured to, together with the at least one processor, further cause the first device to: An indication of a candidate power offset adjustment value from the set of candidate power offset adjustment values ​​to be used for the transmit power adjustment is received from the second device.

11. The first device of claim 10, wherein the indication is received in one of the following: Downlink control information, Media Access Control element, or Downlink Grant.

12. The first device of claim 10, wherein the channel state information configuration comprises a second power offset between a transmission power of a data transmission from the second device and a transmission power of the reference signal, and wherein the at least one memory and the computer program code are configured to, together with the at least one processor, further cause the first device to: determining a third power offset based on the second power offset and the indicated power offset adjustment value; receiving another reference signal from the second device; and Another channel state information report including at least one channel condition parameter based on the third power offset measurement is sent to the second device.

13. The first device of claim 1, wherein the channel state information configuration is received in a radio resource control message.

14. The first device of claim 1, wherein the first device comprises a terminal device, and the second device comprises a network device.

15. A second device, comprising: at least one processor; as well as at least one memory storing instructions that, when executed by the at least one processor, cause the second device to at least: Sending a channel state information configuration to the first device; sending a reference signal to the first device; as well as A channel state information report is received from the first device based on the channel state information configuration, the channel state information report including auxiliary information regarding a transmission power adjustment for the second device.

16. The second device of claim 15, wherein the transmission power adjustment is related to the number of multiple-input multiple-output layers supported by the first device or a rank indicator supported by the first device.

17. A second device according to claim 15, wherein the channel state information configuration includes a channel state information measurement configuration, and the channel state information measurement configuration includes a first power offset corresponding to the maximum transmission power reduction supported by the second device and a second power offset between the transmission power of the data transmission from the second device and the transmission power of the reference signal.

18. The second device of claim 17, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to receive the channel state information report by: Receiving the channel state information report including at least one of the following: a first channel quality indicator measured based on the first power offset, A second channel quality indicator is measured based on the second power offset.

19. The second device of claim 18, wherein the first power offset corresponds to wideband reporting of the first channel quality indicator.

20. The second device of claim 17, wherein the auxiliary information includes information about a margin above a noise floor level at a predetermined block error rate.

21. The second device according to claim 20, wherein The auxiliary information includes at least one of the following: a first channel quality indicator measured based on a first power offset corresponding to a maximum transmission power reduction supported by the second device, a first signal to interference plus noise ratio delta parameter determined based on a first channel quality indicator and a fourth channel quality indicator, the first channel quality indicator being based on the first power offset measurement, the fourth channel quality indicator corresponding to a predetermined channel quality indicator index, or A second signal to interference plus noise ratio delta parameter is determined based on a second channel quality indicator and the fourth channel quality indicator, the second channel quality indicator being based on the second power offset measurement.

22. The second device of claim 15, wherein the channel state information report further comprises a first rank indicator supported by the first device based on a second power offset between a transmission power of a data transmission from the second device and a transmission power of the reference signal, the channel state information configuration comprising a first power offset corresponding to a maximum transmission power reduction supported by the second device, and The auxiliary information includes rank indicator information, and the rank indicator information includes at least one of the following: the first device supports a first indication of the first rank indicator based on the first power offset, or the first device does not support a second indication of the first rank indicator based on the second power offset, for the first device to support a maximum reduced power offset for the first rank indicator, a power offset value for the first device to support a second rank indicator, the first rank indicator being greater than the first rank indicator, or A second channel quality indicator is measured by the first device based on the second rank indicator.

23. The second device of claim 15, wherein the channel state information configuration comprises a set of candidate power offset adjustment values, and wherein the at least one memory and the computer program code are configured to, together with the at least one processor, further cause the second device to: An indication of a candidate power offset adjustment value from the set of candidate power offset adjustment values ​​to be used for the transmit power adjustment is sent to the first device.

24. The second device of claim 23, wherein the indication is sent in one of the following: Downlink control information, Media Access Control element, or Downlink Grant.

25. The second device of claim 23, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the second device to send the indication by: determining at least one of a target transmission power or a target bandwidth for the transmission power adjustment based on the auxiliary information so that the number of the communication channels is supported by the first device; selecting a target power offset adjustment value corresponding to the at least one of a target transmission power or the target bandwidth from the set of candidate power offset adjustment values; and Sending an indication of the target power offset adjustment value to the first device.

26. The second device of claim 23, wherein the at least one memory and the computer program code are configured to, with the at least one processor, further cause the second device to: sending another reference signal to the first device based on a third power offset, wherein the third power offset is determined based on the indicated power offset adjustment value and a second power offset indicated in the channel state information configuration; Another channel state information report including at least one channel condition parameter based on the third power offset measurement is received from the first device.

27. The second device of claim 15, wherein the channel state information configuration is sent in a radio resource control message.

28. The second device of claim 15, wherein the first device comprises a terminal device, and the second device comprises a network device.

29. A method comprising: receiving, at the first device, a channel state information configuration from the second device; as well as In response to receiving a reference signal from the second device, a channel state information report is sent to the second device based on the channel state information configuration, the channel state information report including auxiliary information regarding a transmission power adjustment for the second device.

30. A method comprising: sending, at the second device, a channel state information configuration to the first device; sending a reference signal to the first device; as well as A channel state information report is received from the first device based on the channel state information configuration, the channel state information report including auxiliary information regarding a transmission power adjustment for the second device.

31. A first device, comprising: means for receiving a channel state information configuration from a second device; as well as Means for sending a channel state information report to the second apparatus based on the channel state information configuration in response to receiving a reference signal from the second apparatus, the channel state information report including assistance information regarding a transmission power adjustment for the second apparatus.

32. A second device, comprising: means for sending a channel state information configuration to a first device; means for sending a reference signal to said first device; as well as Means for receiving a channel state information report from the first apparatus based on the channel state information configuration, the channel state information report comprising assistance information regarding a transmission power adjustment for the second apparatus.

33. A computer readable medium comprising program instructions stored thereon, the program instructions being used to execute the method according to claim 29 or 30.

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