Array selection method, terminal, network device and storage medium

Abstract

An embodiment of the present application provides a face selection method, terminal, network device, and storage medium, wherein the method includes: sending auxiliary information to the network device, the auxiliary information including: identification information of the optimal reference signal required for uplink transmission or the face-based maximum power fallback (P-MPR) value corresponding to one or more facets of the terminal when a maximum power radiation (MPE) event occurs; and receiving indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate the face or beam to be used for subsequent uplink transmission by the terminal, or to instruct the terminal to perform a new uplink beam scan. The embodiment of the present application avoids the uplink coverage loss caused by the MPE problem.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a front selection method, terminal, network device and storage medium. Background Art

[0002] When a terminal with multiple antenna arrays detects that an antenna array is pointed at a person for a period of time during uplink transmission, the current mechanism is to implement power backoff, reducing the uplink transmit power to prevent harm. However, power backoff can lead to degraded uplink coverage. How to prevent or minimize this degradation in uplink coverage for terminals with multiple antenna arrays after power backoff is a current issue that needs to be addressed. Summary of the Invention

[0003] The embodiments of the present application provide a face selection method, terminal, network device, and storage medium to solve the problem of uplink coverage loss caused by the inability of the network device to accurately select the face when a multi-face terminal has an MPE problem.

[0004] In a first aspect, an embodiment of the present application provides a method for selecting a front, comprising:

[0005] Sending auxiliary information to the network device, the auxiliary information including: identification information of the optimal reference signal required for uplink transmission or the maximum power fallback (P-MPR) value based on the array corresponding to one or more arrays of the terminal when the maximum power radiation (MPE) event occurs;

[0006] Receive indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform new uplink beam scanning.

[0007] In a second aspect, an embodiment of the present application provides a method for selecting a front, including:

[0008] Receive auxiliary information sent by the terminal, where the auxiliary information includes: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs;

[0009] Determining, based on the auxiliary information, a front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission;

[0010] Sending indication information to the terminal, wherein the indication information is used to indicate the front plane or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform new uplink beam scanning.

[0011] In a third aspect, an embodiment of the present application provides a terminal, including a memory, a transceiver, and a processor:

[0012] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0013] Send auxiliary information to the network device, where the auxiliary information includes: identification information of the optimal reference signal required for uplink transmission or maximum power fallback P-MPR values ​​based on the front plane corresponding to one or more front planes of the terminal when the maximum power radiation MPE event occurs.

[0014] Receive indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform new uplink beam scanning.

[0015] In a fourth aspect, an embodiment of the present application provides a network device, including a memory, a transceiver, and a processor:

[0016] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations:

[0017] Receive auxiliary information sent by the terminal, where the auxiliary information includes: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs;

[0018] Determining, based on the auxiliary information, a front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission;

[0019] Sending indication information to the terminal, wherein the indication information is used to indicate the front plane or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform new uplink beam scanning.

[0020] In a fifth aspect, an embodiment of the present application provides a front selection device, comprising:

[0021] The sending module is configured to send auxiliary information to the network device, where the auxiliary information includes: identification information of the optimal reference signal required for uplink transmission or the maximum power fallback P-MPR value based on the array corresponding to one or more arrays of the terminal when the maximum power radiation MPE event occurs.

[0022] A receiving module is used to receive indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan.

[0023] In a sixth aspect, an embodiment of the present application provides a front selection device, comprising:

[0024] A receiving module is configured to receive auxiliary information sent by a terminal, the auxiliary information including: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs;

[0025] a determination module, configured to determine, based on the auxiliary information, a front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission;

[0026] A sending module is used to send indication information to the terminal, wherein the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform new uplink beam scanning.

[0027] In a seventh aspect, an embodiment of the present application provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method described in the first aspect or the second aspect.

[0028] The array selection method, terminal, network device, and storage medium provided in the embodiments of the present application send auxiliary information to the network device, and the auxiliary information includes identification information of the optimal reference signal required for uplink transmission or the P-MPR value corresponding to one or more arrays of the terminal when an MPE event occurs. Based on the auxiliary information, the performance differences between different transmission arrays of the terminal can be accurately reflected, so that the network device can accurately indicate the array or beam to be used for subsequent uplink transmission of the terminal based on the auxiliary information, or instruct the terminal to perform a new uplink beam scan, thereby reducing the uplink coverage loss caused by the MPE problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a flowchart of the steps of the array plane selection method applied to the terminal in an embodiment of the present application;

[0031] Figure 2 This is a flowchart of the steps of the array surface selection method applied to the network device in an embodiment of the present application;

[0032] Figure 3 This is a schematic diagram of the structure of the terminal in the embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the structure of the network device in the embodiment of the present application;

[0034] Figure 5 This is a module block diagram of a front selection device applied to a terminal in an embodiment of the present application;

[0035] Figure 6 This is a module block diagram of a front selection device applied to a network device in an embodiment of the present application;

[0036] Figure 7 This is one of the structural diagrams of MCE CE in the embodiment of this application;

[0037] Figure 8 This is the second structural diagram of MCE CE in the embodiment of this application. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] In NR, when the terminal detects the occurrence of a Maximum Power Exposure (MPE) event, the terminal will determine the maximum allowable power fallback value and make corresponding power fallback. When the power fallback value within a certain time period is greater than a certain threshold value ("phr-Tx-PowerFactorChange" dB), the terminal will initiate a Power Headroom Report (PHR) report and report the panel maximum power fallback (Panel Maximum Power Reduction) value and the maximum transmit power value to the base station through the Media Access Control-Control Element (MAC-CE). The base station receives the MPE report from the terminal and knows that the terminal has encountered an MPE problem and has used P-MPR for power fallback. The maximum output power after fallback is P CMAX,f,c, the current power transmit margin is PH. The base station readjusts the terminal's transmit signal resource configuration based on these parameters. For example, the base station can use these parameters to estimate the duty cycle of the terminal's uplink transmission to meet radiation limit requirements without power backoff. Alternatively, the base station can lower the modulation and coding scheme (MCS) for uplink transmission or reduce the number of physical resource blocks (PRBs) transmitted by the terminal. The terminal sends uplink signals according to the base station's scheduling, achieving both MPE requirements and good communication quality.

[0040] However, existing MPE solutions don't account for the situation where a terminal has multiple transmission planes. When a terminal has multiple transmission planes, each has a different transmission path to the base station, and MPE obstruction events occur independently for each transmission plane. Existing P-MPR reporting schemes cannot accurately reflect the performance differences between different terminal transmission planes. Consequently, when the base station receives a terminal's report, it cannot use the terminal's feedback information to instruct the terminal to select between multiple transmission planes, thereby mitigating uplink coverage loss or degradation caused by MPE issues.

[0041] Therefore, embodiments of the present application provide a transmission plane selection method, terminal, network device, and storage medium to solve the problem that existing solutions cannot use feedback information from the terminal to instruct the terminal to select multiple transmission planes.

[0042] Among them, the method and the device are based on the same application concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0043] The technical solution provided in the embodiment of the present application can be applicable to a variety of systems, especially 5G systems. For example, the applicable system can be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet radio service (GPRS) system, a long term evolution (LTE) system, a LTE frequency division duplex (FDD) system, a LTE time division duplex (TDD) system, an advanced long term evolution (LTE-A) system, a universal mobile telecommunication system (UMTS), a world-wide interoperability for microwave access (WiMAX) system, a 5G new air interface (NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0044] The terminal device involved in the embodiments of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing devices connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called a user equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a radio access network (RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it can be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges language and / or data with a radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and other devices. Wireless terminal devices may also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, access points, remote terminal devices, access terminal devices, user terminal devices, user agents, and user devices, and are not limited in the embodiments of the present application. Since terminal devices and other network devices (such as core network devices and access network devices (i.e., base stations)) together constitute a network that supports communication, in the present invention, terminal devices are also considered as a type of network device.

[0045] The network device involved in the embodiments of the present application may be a base station, which may include multiple cells providing services to terminals. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device through one or more sectors on an air interface, or may be named otherwise. The network device may be used to interchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, wherein the rest of the access network may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management of the air interface. For example, the network device involved in the embodiments of the present application may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (eNB or e-NodeB) in the Long Term Evolution (LTE) system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (HeNB), a relay node, a home base station (femto), a pico base station (pico), etc., and is not limited in the embodiments of the present application. In some network structures, the network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

[0046] Furthermore, it should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0047] The present application is described in detail below.

[0048] like Figure 1FIG. 1 is a flowchart of a method for selecting a front plane applied to a terminal in an embodiment of the present application. The method includes the following steps:

[0049] Step 101: Send auxiliary information to a network device.

[0050] Specifically, in this embodiment, the terminal has at least two beams. In this case, the terminal sends auxiliary information through a network device, which enables the network device to determine the beam or beam to be used for subsequent uplink transmissions by the terminal, or to determine whether the terminal should perform a new uplink beam scan. That is, the terminal sends the auxiliary information to the network device, so that the network device can determine the beam or beam to be used for subsequent uplink transmissions by the terminal, or to determine whether the terminal should perform a new uplink beam scan, based on the auxiliary information.

[0051] Furthermore, the auxiliary information may specifically include identification information of an optimal reference signal required for uplink transmission or P-MPR values ​​corresponding to one or more array planes of the terminal when an MPE event occurs. That is, the terminal may send identification information of the optimal reference signal required for uplink transmission to the network device as auxiliary information, or send P-MPR values ​​corresponding to one or more array planes of the terminal to the network device as auxiliary information.

[0052] Specifically, the identification information of the optimal reference signal required for uplink transmission may be a channel state information reference signal index (CRI for short) or a synchronization signal block index (SSBRI for short).

[0053] The optimal reference signal for uplink transmission can be the reference signal with the highest uplink transmit power value. This allows network devices to identify the optimal beamform based on the optimal reference signal, thereby enabling network devices to select the beamform or beamform corresponding to the optimal reference signal for uplink transmission as the beamform or beamform used for uplink transmission, thereby reducing uplink coverage loss caused by MPE issues.

[0054] In addition, when an MPE event occurs, the terminal may also send a P-MPR value corresponding to one array face, or a P-MPR value corresponding to each array face among multiple array faces to the network device.

[0055] It should also be noted that the multiple beams may also be all beams of the terminal. In addition, when the auxiliary information includes a P-MPR value corresponding to a beam, the P-MPR value may be the P-MPR value of the beam where the MPE problem occurs, so that the network device can directly select other beams or beams for subsequent uplink transmission based on the P-MPR value of the beam.

[0056] Because each array corresponds to a P-MPR value, the P-MPR report can accurately reflect the performance differences of different arrays of the terminal, so that the network equipment can know the P-MPR value for the specific array, and then the network equipment can select the transmission array based on this, and can use the array or beam with the largest beam intensity as the array or beam for subsequent uplink transmission, reducing the uplink coverage loss or reduction caused by the MPE problem.

[0057] In addition, it should be noted that the uplink transmission may include a physical uplink control channel (PUCCH for short), a physical uplink shared channel (PUSCH for short) or a channel sounding reference signal (SRS for short).

[0058] Step 102: Receive indication information sent by the network device based on the auxiliary information.

[0059] Specifically, the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan.

[0060] Specifically, after receiving the auxiliary information of the terminal, the network device can determine the array or beam used by the terminal for new uplink beam scanning or subsequent uplink transmission based on the auxiliary information, and send indication information to the terminal.

[0061] It should be noted that the terminal can provide instructions through the UL TCI architecture.

[0062] The auxiliary information can accurately reflect the performance differences of different transmission arrays of the terminal, thereby ensuring the high quality of the array or beam used for subsequent uplink transmission of the determined terminal and reducing the uplink coverage loss caused by the MPE problem.

[0063] In this way, this embodiment sends auxiliary information to the network device, and the auxiliary information includes identification information of the optimal reference signal required for uplink transmission or the P-MPR value corresponding to one or more arrays of the terminal when the MPE event occurs. Based on the auxiliary information, the performance difference of different transmission arrays of the terminal can be accurately reflected, so that the network device can accurately indicate the array or beam used for subsequent uplink transmission of the terminal based on the auxiliary information, or instruct the terminal to perform a new uplink beam scan, thereby reducing the uplink coverage loss caused by the MPE problem.

[0064] Optionally, in this embodiment, when the auxiliary information includes the P-MPR value corresponding to one or more arrays of the terminal, the auxiliary information may also include an MPE event; and / or a reference signal received power (RSRP) corresponding to one or more arrays.

[0065] That is, when the terminal reports the P-MPR value corresponding to one or more array surfaces to the network device, it can also report the MPE event and the RSRP corresponding to one or more array surfaces at the same time, or report the MPE event and the RSRP corresponding to one or more array surfaces at the same time, so that the network device can further refer to the above information to select the array surface or beam used for subsequent uplink transmission.

[0066] Optionally, the triggering condition of the MPE event may include that a P-MPR value is greater than a preset backoff value within a preset period; or, for any front, an RSRP estimation value of the uplink beam is less than a preset value.

[0067] That is, when the P-MPR value within the preset time period is greater than the preset back-off value, or the RSRP estimation value for the uplink beam on any array is less than the preset value, it can be considered that an MPE event has occurred.

[0068] In addition, optionally, in this embodiment, the network device may control the terminal to report the auxiliary information, and the terminal may also autonomously report the auxiliary information. These two methods are described below respectively.

[0069] Specifically, the auxiliary information includes the first auxiliary information or the second auxiliary information. When the auxiliary information is sent to the network device, any of the following methods may be included:

[0070] First, notification information sent by the network device is received, and first auxiliary information is sent to the network device according to the notification information.

[0071] Specifically, the notification information is used to notify the terminal to report the optimal reference signal required for uplink transmission. In this case, the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission.

[0072] Specifically, in this method, the network device can configure reference signal resources for the terminal through high-layer signaling, and configure notification information through high-layer signaling or L1 dynamic signaling to instruct the terminal to measure and report an optimal reference signal (CRI / SSBRI) for uplink transmission, where the high-layer signaling includes L2 signaling or L3 signaling.

[0073] For example, the notification information configured by the higher layer signaling may be as follows:

[0074]

[0075] The above method realizes the sending mode of the auxiliary information triggered by the network device, so that the network device notifies the terminal to send the auxiliary information when the auxiliary information needs to be obtained, thereby avoiding the terminal from sending the auxiliary information ineffectively.

[0076] Specifically, the notification information is further used to notify the terminal to report the RSRP after power fallback. In this case, the first auxiliary information also includes the RSRP after power fallback. The RSRP may be L1-RSRP, thereby enabling the network device to assist in determining the optimal beam based on the RSRP reported by the terminal after the MPE event occurs.

[0077] In addition, specifically, before receiving the notification information sent by the network device, the terminal may also report capability information to the network device, where the capability information is used to indicate whether the terminal has the capability to add a power backoff value to the calculation of the optimal reference signal.

[0078] That is, for auxiliary information reporting controlled by network equipment, terminals with multiple arrays need to report their capabilities to inform the network equipment that they are capable of considering the power backoff value in the calculation of the optimal reference signal. This indicates that the optimal reference signal reported by the terminal has taken into account the impact of power backoff, ensuring the reliability of the optimal reference signal under the MPE problem.

[0079] In addition, specifically, before the terminal sends the first auxiliary information to the network device according to the notification information, it is also necessary to use each array to perform RSRP measurement on the reference signal configured by the network device to obtain the RSRP of the reference signal measured by each array; then, based on the RSRP of the reference signal measured by each array and the P-MPR value of each array, determine the reference signal with the highest uplink transmit power value, and determine the reference signal with the highest transmit power value as the optimal reference signal required for uplink transmission.

[0080] That is, after receiving the notification message, the terminal measures the downlink received signal quality according to the configuration of the network device, and determines the optimal reference signal for uplink transmission according to the measurement results and the power fallback when encountering the MPE problem. Finally, the identification information of the optimal reference signal (i.e., CRI / SSBRI) is reported to the network device to assist the network device in selecting the array or beam for subsequent uplink transmission. At this time, the network device can use the array or beam corresponding to the optimal reference signal as the array or beam for subsequent uplink transmission to reduce the uplink coverage loss caused by the MPE problem.

[0081] Secondly, when the terminal detects that an MPE event occurs, it sends second auxiliary information to the network device. Specifically, the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal.

[0082] In this way, when the terminal detects that an MPE event occurs, the terminal can determine the P-MPR values ​​corresponding to one or more arrays, and notify the network device of the P-MPR values ​​corresponding to the one or more arrays on the resources configured by the network device, so that the network device can determine and select the array or beam used for subsequent uplink transmission of the terminal based on the P-MPR values ​​corresponding to the one or more arrays and indicate it to the terminal.

[0083] In addition, optionally, in this embodiment, when sending the second auxiliary information to the network device, a request information can also be sent to the network device, and the request information is used to trigger the network device to send at least one channel state information reference signal (CSI-RS for short) for beam scanning, wherein at least one CSI-RS is pre-associated with the array of the terminal; then the terminal measures the reference signal received power RSRP after power backoff corresponding to each CSI-RS, and based on the measurement results, determines the reference signal with the highest transmission power value after power backoff as the optimal reference signal required for uplink transmission.

[0084] Among them, such as Figure 7 As shown, a preset field is newly added in the MAC CE, and the preset field includes the request information; the terminal sends the request information to the network device through the MAC CE.

[0085] Specifically, when a terminal with multiple transmission fronts detects an MPE event according to a predefined threshold, the terminal determines the P-MPR value based on the front or beam and notifies the base station of the power backoff value based on the front or beam on the uplink transmission resources configured by the base station, as well as the P value based on this power backoff. CMAX And power margin (abbreviated as PH). In addition, if Figure 7 As shown, at the same time, the terminal uses a preset field (Pnew field) with a bit width of 1 bit to trigger the base station to send at least one CSI-RS; the base station receives the report from the terminal and sends at least one CSI-RS for beam scanning. The terminal measures the L1-RSRP value of the CSI-RS and considers the P-MPR value on the power corresponding beam, selects the optimal reference signal and reports the corresponding beam index CRI to the base station, assisting the base station in selecting the array or beam used for subsequent uplink (PUCCH / PUSCH / SRS) transmission and indicating it to the terminal.

[0086] In addition, specifically, the second auxiliary information also includes identification information of the optimal reference signal required for uplink transmission.

[0087] A preset field is newly added in a media access control layer control element (MAC CE), and the preset field is used to indicate identification information of the optimal reference signal required for the uplink transmission; the terminal sends the second auxiliary information to the network device through the MAC CE.

[0088] Specifically, the MAC CE after adding the preset domain is as follows: Figure 8 As shown in FIG, the CRI / SSBRI field in the MAC CE is a newly added preset field. At this time, the correspondence between the CRI / SSBRI value and the beam or array can be set to determine the optimal reference signal required for uplink transmission by setting the CRI / SSBRI value.

[0089] That is, if a terminal with multiple transmission fronts detects an MPE event according to a predefined threshold, the terminal determines the P-MPR value based on the front / beam and notifies the network device of the power backoff value based on the front / beam and the maximum output power (P) at this power backoff on the uplink transmission resources configured by the network device. CMAX ), power headroom (PH), and optimal reference signal (CRI / SSBRI) required for uplink transmission. For details, see Figure 8 As shown, the network device can select the array / beam used for the terminal's subsequent uplink (PUCCH / PUSCH / SRS) transmission and indicate it to the terminal. Specifically, the optimal reference signal required for uplink transmission can refer to a candidate beam without MPE problem.

[0090] The above method realizes the terminal's autonomous transmission of auxiliary information, so that the terminal reports the auxiliary information immediately after the MPE event occurs, so that the network equipment can promptly select the array or beam used for the terminal's subsequent uplink transmission, thereby reducing the uplink coverage loss caused by the MPE problem.

[0091] In this way, the sending of auxiliary information is achieved through any of the above methods.

[0092] In addition, optionally, in this embodiment, when the terminal sends auxiliary information to the network device, any of the following items may be included:

[0093] Periodically send auxiliary information to network devices;

[0094] Semi-continuously sending auxiliary information to network devices;

[0095] Send auxiliary information to network devices non-periodically.

[0096] That is, the terminal may send the auxiliary information periodically, semi-continuously or aperiodically, which is not specifically limited here, thereby ensuring the flexibility of the auxiliary information sending method.

[0097] In addition, it should be noted that when the terminal sends auxiliary information to the network device, the auxiliary information can be sent to the network device through a physical random access channel (PRACH for short), PUCCH or PUSCH, which is not specifically limited here.

[0098] In this way, the array selection method provided in this embodiment sends auxiliary information to the network device, and the auxiliary information includes identification information of the optimal reference signal required for uplink transmission or the P-MPR value corresponding to one or more arrays of the terminal when the MPE event occurs. This enables the auxiliary information to accurately reflect the performance differences of different transmission arrays of the terminal, thereby enabling the network device to accurately select the array or beam used for subsequent uplink transmission based on the auxiliary information, thereby reducing the uplink coverage loss caused by the MPE problem.

[0099] like Figure 2 FIG. 1 is a flowchart of a method for selecting a front face of a network device according to an embodiment of the present invention. The method includes:

[0100] Step 201: Receive auxiliary information sent by a terminal.

[0101] Specifically, the auxiliary information includes: identification information of the optimal reference signal required for uplink transmission or P-MPR values ​​corresponding to one or more fronts of the terminal when an MPE event occurs.

[0102] Specifically, the network device receives auxiliary information sent by the terminal, where the auxiliary information may include identification information of an optimal reference signal required for uplink transmission, or P-MPR values ​​corresponding to one or more fronts of the terminal when an MPE event occurs.

[0103] It should be noted here that for a detailed introduction to the auxiliary information, please refer to the relevant content of the terminal side method embodiment, which will not be repeated here.

[0104] Step 202: Determine, based on the auxiliary information, the front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission.

[0105] In this step, specifically, after obtaining the auxiliary information, the network device can determine the terminal to perform a new uplink beam scan based on the auxiliary information, that is, control the terminal to perform a new uplink beam scan to reselect the array or beam, or determine the array or beam used for subsequent uplink transmission of the terminal based on the auxiliary information to achieve the selection of the optimal array or beam, thereby reducing the uplink coverage loss caused by the MPE problem.

[0106] Step 203: Send instruction information to the terminal.

[0107] Specifically, the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan.

[0108] In this step, after determining that the terminal performs a new uplink beam scan or the array or beam used for subsequent uplink transmission, the network device sends an indication message to the terminal to instruct the terminal on the array or beam used for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan.

[0109] In this way, this embodiment receives the auxiliary information sent by the terminal, and the auxiliary information includes the identification information of the optimal reference signal required for uplink transmission or the P-MPR value corresponding to one or more arrays of the terminal when the MPE event occurs. Based on the auxiliary information, the performance difference of different transmission arrays of the terminal can be accurately reflected, so that the network device can accurately select the array or beam used for subsequent uplink transmission based on the auxiliary information, thereby reducing the uplink coverage loss caused by the MPE problem.

[0110] Optionally, in this embodiment, when the network device determines the front plane or beam used for subsequent uplink transmission of the terminal according to the auxiliary information, any of the following methods may be used:

[0111] First, when the auxiliary information includes identification information of the optimal reference signal required for uplink transmission, the front plane or beam corresponding to the optimal reference signal required for uplink transmission is determined as the front plane or beam used for subsequent uplink transmission of the terminal.

[0112] That is, when the auxiliary information includes the identification information of the optimal reference signal required for uplink transmission, the network device can directly determine the array or beam corresponding to the optimal reference signal as the array or beam used for subsequent uplink transmission of the terminal, thereby ensuring that the beam strength of the array or beam used for subsequent uplink transmission of the terminal is the highest beam strength, avoiding the uplink coverage loss caused by the MPE problem.

[0113] Second, when the auxiliary information includes the P-MPR value corresponding to one or more arrays of the terminal, the array or beam with the highest uplink transmit power value is determined based on the P-MPR value corresponding to one or more arrays of the terminal, and the array or beam with the highest uplink transmit power value is determined as the array or beam used for subsequent uplink transmission of the terminal.

[0114] Specifically, when the auxiliary information includes the P-MPR value corresponding to one or more arrays of the terminal, the terminal can determine the array or beam with the highest uplink transmit power value from all arrays or beams of the terminal based on the P-MPR value corresponding to one or more arrays of the terminal, that is, select the array or beam with the highest beam intensity, and determine the array or beam as the array or beam used for subsequent uplink transmission of the terminal.

[0115] It should be noted that if the auxiliary information also includes the RSRP corresponding to the one or more array planes, the network device can further refer to the RSRP corresponding to the one or more array planes to determine the array plane or beam with the highest uplink transmit power value. In this case, the difference between the RSRP and the P-MPR value of each array plane can be calculated, and the array plane or beam with the largest difference can be determined as the array plane or beam with the highest uplink transmit power value.

[0116] Of course, if the RSRP corresponding to all arrays is configured to be the same, the network device does not receive the RSRP corresponding to one or more arrays, and can still determine the array or beam with the highest uplink transmit power value. At this time, the array or beam with the smallest P-MPR value can be determined as the array or beam with the highest uplink transmit power value.

[0117] In this way, any of the above methods can accurately determine the array or beam used for subsequent uplink transmission of the terminal, thereby avoiding the uplink coverage loss caused by the MPE problem.

[0118] Optionally, when the auxiliary information includes P-MPR values ​​corresponding to one or more arrays of the terminal, the auxiliary information further includes: MPE events; and / or reference signal received power RSRP corresponding to one or more arrays.

[0119] In addition, the triggering conditions of the MPE event include: the P-MPR value within a preset period is greater than the preset back-off value; or, for any array, the RSRP estimated value of the uplink beam is less than the preset value.

[0120] Uplink transmission includes PUCCH, PUSCH or SRS.

[0121] It should be noted here that for a detailed introduction to the above content, please refer to the relevant content of the terminal side method embodiment, which will not be repeated here.

[0122] In addition, optionally, the auxiliary information includes first auxiliary information or second auxiliary information; when the network device receives the auxiliary information sent by the terminal, it can include any of the following methods:

[0123] First, notification information is sent to the terminal, and first auxiliary information sent by the terminal according to the notification information is received.

[0124] Specifically, the notification information is used to notify the terminal to report the optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission.

[0125] Specifically, the notification information is further used to notify the terminal to report the RSRP after power backoff. In this case, the first auxiliary information also includes the RSRP after power backoff.

[0126] In addition, specifically, before sending notification information to the terminal, the network device may receive capability information sent by the terminal, where the capability information is used to indicate whether the terminal has the capability to add a power backoff value to calculation of an optimal reference signal.

[0127] Secondly, the receiving terminal sends the second auxiliary information when detecting that an MPE event occurs.

[0128] Specifically, the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal.

[0129] In addition, optionally, when receiving the second auxiliary information sent by the terminal when detecting the occurrence of an MPE event, the network device can also receive a request information sent by the terminal, wherein the request information is used to trigger the network device to send at least one CSI-RS for beam scanning, wherein at least one CSI-RS is pre-associated with the array of the terminal; the network device then sends the at least one CSI-RS for beam scanning based on the request information, so that the terminal can measure and compare the RSRP value of each CSI-RS after power fallback, and then determine the reference signal with the highest transmission power value as the optimal reference signal required for uplink transmission based on the measurement result, and send the optimal reference signal required for uplink transmission to the network device. At this time, the network device can determine the array and beam used for uplink transmission based on the association relationship between at least one CSI-RS and the array of the terminal.

[0130] Specifically, a preset field is newly added in the MAC CE, and the preset field includes the request information; the terminal sends the request information to the network device through the MAC CE.

[0131] In addition, specifically, the second auxiliary information also includes identification information of the optimal reference signal required for uplink transmission.

[0132] In addition, a preset field is newly added in the MAC CE, and the preset field is used to indicate identification information of the optimal reference signal required for the uplink transmission; wherein the network device receives the second auxiliary information sent by the terminal through the MAC CE.

[0133] In this way, the network device can control the terminal to send auxiliary information or the terminal can autonomously send auxiliary information when the MPE event is triggered. For the specific contents of the above two methods, please refer to the relevant contents of the terminal side method embodiment, which will not be repeated here.

[0134] In addition, optionally, the auxiliary information received by the network device from the terminal includes any one of the following:

[0135] receiving auxiliary information periodically sent by the terminal;

[0136] receiving auxiliary information semi-continuously sent by the terminal;

[0137] The auxiliary information sent aperiodically by the receiving terminal.

[0138] In addition, when the network device receives the auxiliary information sent by the terminal, it can also receive the auxiliary information sent by the terminal through the PRACH, PUCCH or PUSCH.

[0139] It should be noted here that for a detailed introduction to the specific method for receiving the above-mentioned auxiliary information, please refer to the relevant content of the terminal side method embodiment, which will not be repeated here.

[0140] In the array selection method provided in this embodiment, the network device receives auxiliary information and selects the array or beam for the terminal to perform subsequent uplink transmission based on the auxiliary information, or determines that the terminal performs a new uplink beam scan. The auxiliary information can reflect the performance of the terminal array, so that the terminal avoids uplink coverage loss caused by the MPE problem after using the array or beam selected by the network device or performing a new uplink beam scan.

[0141] The present application will be described in detail below through specific embodiments.

[0142] In the first embodiment, the network device notifies the terminal to report auxiliary information:

[0143] Assume that the terminal has two panels, namely the first panel and the second panel. The terminal reports its capabilities and informs the network device that the terminal considers power fallback in the optimal reference signal calculation. In addition, the network device configures two channel state information reference signal (CSI-RS) resources for the terminal, denoted as the first CSI-RS resource and the second CSI-RS resource, and configures the terminal to measure the first downlink CSI-RS resource through the first panel and the second downlink CSI-RS resource through the second panel. The configuration information is:

[0144]

[0145] The terminal then performs measurements according to the network device configuration, obtaining a first RSRP value for the first beam and a second RSRP value for the second beam. The terminal estimates the uplink transmit power values ​​for the first and second beams based on the first and second RSRP values. Assume that the terminal detects a person obstructing the direction of the first beam and determines the power backoff value as the first P-MPR. Similarly, the terminal determines the power backoff value for the second beam as the second P-MPR (if there is no obstruction, this value is 0). The terminal then compares the value of the first RSRP minus the first P-MPR with the value of the second RSRP minus the second P-MPR. If the first RSRP minus the first P-MPR is less than the second RSRP minus the second P-MPR, the terminal determines that the beam strength of the uplink signal transmitted using the second beam is greater than that of the first beam. The terminal then reports the corresponding second CSI-RS resource to the network device, instructing the terminal to use the corresponding beam or beam for optimal uplink transmission performance.

[0146] Then, after receiving the terminal's instruction, the network device instructs the terminal to use the receive beam or array containing the second CSI-RS to send PUSCH in the subsequent uplink PUSCH transmission through the UL TCI-state. After receiving the instruction from the network device, the terminal sends PUSCH using the corresponding beam on the array.

[0147] The second embodiment is directed to a method in which a terminal autonomously reports auxiliary information after an MPE event occurs:

[0148] Assume that the terminal has two panels, represented by panel-ID0 and panel-ID1. The network device configures the PUCCH resources for transmitting MPE events to the terminal through RRC signaling. At the same time, the network device configures the time slot m and timing offset for transmitting this PUCCH to the terminal. In the nth time slot, the terminal detects that the P-MPR value on panel-ID0 exceeds the system predefined threshold, that is, an MPE event occurs, then the terminal sends the MPE event and P-MPR0 on panel-ID0 on the PUCCH resources configured by the system. The indication of sending the panel can be an explicit panel-ID indication or an implicit indication through the uplink / downlink reference signal.

[0149] After receiving and demodulating the PUCCH, the network device detects that an MPE problem has occurred on panel ID 0 of the terminal. The network device then instructs the terminal to use panel ID 1 for subsequent uplink data transmissions. During subsequent uplink data transmissions, the terminal uses the panel ID 1 indicated by the network device for uplink signal transmission. If the terminal does not receive the instruction from the network device, it defaults to using panel ID 0 for uplink data transmission.

[0150] The third embodiment is directed to a method in which a terminal autonomously reports auxiliary information after an MPE event occurs:

[0151] Assume that the terminal has two panels, represented by panel-ID0 and panel-ID1. The network device instructs the terminal to report the P-MPR value through MAC CE signaling. At the same time, the network device instructs the terminal to use the PUSCH resource for sending the P-MPR value through L1 dynamic signaling. In the nth time slot, the terminal detects that any P-MPR value on panel-ID0 or panel-ID1 exceeds the system predefined threshold value, then the terminal sends P-MPR0 on panel-ID0 and P-MPR1 on panel-ID1 on the PUSCH resource configured by the system. The indication of sending the panel can be an explicit panel-ID indication or an implicit indication through the uplink / downlink reference signal.

[0152] After the network device receives and demodulates the PUSCH, if P-MPR0 > P-MPR1, it indicates that the power fallback for sending signals using panel-ID1 is small. Assuming the maximum transmit power of the two panels is the same, the network device determines that the beam strength of the uplink signal sent using panel-ID1 is greater than that of panel-ID0. After receiving the terminal's instruction, the network device instructs the terminal to use panel-ID1 for uplink signal transmission through UL TCI-state in subsequent uplink PUSCH / PUCCH transmissions.

[0153] Fourth embodiment:

[0154] Assume that the terminal has two panels, represented by panel-ID1 and panel-ID2. Panel-ID1 is associated with CSI-RS1 and CSI-RS2, and Panel-ID2 is associated with CSI-RS3 and CSI-RS4. This association relationship can be pre-established through beam scanning. In the nth time slot, assume that the terminal is scheduled for uplink PUSCH transmission and sends PUSCH with the beam receiving CSI-RS1. At the same time, the terminal detects that panel-ID1 encounters an MPE problem and performs power fallback. The power fallback value is P_MPR1 and exceeds the threshold configured by the system. The terminal sends an MPE report to the base station using Figure 7 The PHRMAC-CE for reporting power headroom is shown, where the bit width is 1 bit. new The field is used to trigger the network device to send CSI-RS.

[0155] Then, after receiving the terminal's report, the network device sends CSI-RS1, CSI-RS2, CSI-RS3 and CSI-RS4 for beam scanning. The terminal measures and compares the L1-RSRP values ​​of each CSI-RS and considers the impact of power fallback. For example, the terminal compares the L1-RSRP 1,1 –P_MPR1,L1-RSRP 1,2 –P_MPR2,L1-RSRP 2,3– P_MPR2,L1-RSRP 2,4 –P_MPR4, where L1-RSRP i，j Indicates the L1-RSRP value of the j-th CSI-RS on panel-ID i; the terminal discovers the L1-RSRP 2,4 If P_MPR4 is the largest, the terminal considers the beam used to receive the fourth CSI-RS on panel-ID2 to be the optimal beam for uplink transmission. The terminal reports CRI-RS4 to the network device. Upon receiving the terminal's report, the network device instructs the terminal to transmit the PUSCH using the beam used to receive the fourth CSI-RS on panel-ID2.

[0156] The fifth embodiment is a method for a network device to notify a terminal to report auxiliary information:

[0157] Assume that the terminal has two panels, represented by panel-ID1 and panel-ID2. Panel-ID1 is associated with CSI-RS1 and CSI-RS2, and Panel-ID2 is associated with CSI-RS3 and CSI-RS4. This association can be pre-established through beam scanning. In the nth time slot, assume that the terminal is scheduled to transmit uplink PUSCH and transmit PUSCH using the beam receiving CSI-RS1. At the same time, the terminal detects that panel-ID1 encounters an MPE problem and performs power fallback. The power fallback value is P_MPR1 and exceeds the threshold configured by the system. The terminal sends an MPE report to the network device using Figure 8 The power headroom reporting medium access control element (PHR MAC-CE) shown in the figure. After the network device receives the report from the terminal, it sends CSI-RS1, CSI-RS2, CSI-RS3, and CSI-RS4 for beam scanning. The terminal measures and compares the L1-RSRP value of each CSI-RS and considers the impact of power fallback. For example, the terminal compares the L1-RSRP value of each CSI-RS. 1,1 –P_MPR1,L1-RSRP 1,2 –P_MPR2,L1-RSRP 2,3– P_MPR2,L1-RSRP 2,4 –P_MPR4, where L1-RSRP i，jRepresents the L1-RSRP value of the j-th CSI-RS on panel-ID i. The terminal discovers the L1-RSRP 1，1 –P_MPR1,L1-RSRP 1,2 –P_MPR2 is the maximum and second largest, respectively expressed as L1-RSRP new,1 and L1-RSRP new,2 The terminal reports L1-RSRP new,1 +CRI1, L1-RSRP new,2 +CRI2 is sent to the network device. After receiving the report from the terminal, the network device selects a beam, such as the beam receiving CSI-RS1, as the optimal beam for uplink transmission, and instructs the terminal to send PUSCH using the beam receiving the first CSI-RS on panel-ID1.

[0158] The sixth embodiment is directed to a method in which a terminal autonomously reports auxiliary information after an MPE event occurs:

[0159] Assume that the terminal has two panels, represented by panel-ID0 and panel-ID1. In the nth time slot, the terminal detects that the MPE value of the beam transmitted on panel-ID0 exceeds the threshold value specified by the environmental regulatory department, and the terminal performs power backoff on the beam on panel-ID0. Assume that the power backoff value P-MPR is 6dB, which exceeds the threshold value pre-specified by the network (for example, 3dB), the terminal triggers the MPE report and sends Figure 8 The MAC CE shown is transmitted to the network device on the uplink transmission resources that the network device has allocated. Figure 8 In the MAC CE shown, the MPE field is set to 01 (2 bits), indicating that the actual P-MPR absolute value used is 6dB. At the same time, the value of the CRI / SSBRI field is 1, indicating that beam 1 on panel-ID1 is used as a candidate beam without power backoff for subsequent uplink transmission. After receiving the terminal's instruction, the network device instructs the terminal to use the CSI-RS1 receive beam / panel to send PUSCH in the subsequent uplink PUSCH transmission through the UL TCI-state. After receiving the instruction from the base station, the terminal sends PUSCH using the corresponding beam on panel-ID1.

[0160] In this way, any of the above embodiments can realize the selection of the front or beam used for uplink transmission.

[0161] Figure 3 This is a structural diagram of a terminal provided in an embodiment of the present application, including a memory 320, a transceiver 300, and a processor 310.

[0162] Among them, Figure 3In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 310 and memory represented by memory 320. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 300 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The processor 310 is responsible for managing the bus architecture and general processing, and the memory 320 may store data used by the processor 310 when performing operations.

[0163] The processor 310 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0164] The memory 320 is used to store computer programs; the transceiver 300 is used to send and receive data under the control of the processor; the processor 310 is used to read the computer program in the memory and perform the following operations:

[0165] Send auxiliary information to the network device, where the auxiliary information includes: identification information of the optimal reference signal required for uplink transmission or maximum power fallback P-MPR values ​​based on the front plane corresponding to one or more front planes of the terminal when the maximum power radiation MPE event occurs.

[0166] Receive indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform new uplink beam scanning.

[0167] Optionally, when the auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal, the auxiliary information further includes:

[0168] MPE event; and / or, reference signal received power RSRP corresponding to one or more array planes.

[0169] Optionally, the auxiliary information includes first auxiliary information or second auxiliary information; and the sending the auxiliary information to the network device includes:

[0170] receiving notification information sent by the network device, and sending the first auxiliary information to the network device according to the notification information, wherein the notification information is used to notify the terminal to report the optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or

[0171] When the terminal detects that an MPE event occurs, the terminal sends the second auxiliary information to the network device, where the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal.

[0172] Optionally, the sending the second auxiliary information to the network device further includes:

[0173] Sending a request message to the network device, where the request message is used to trigger the network device to send at least one channel state information reference signal CSI-RS for beam scanning, wherein the at least one CSI-RS is pre-associated with the array of the terminal; measuring the reference signal received power RSRP after power backoff corresponding to each CSI-RS, and determining the reference signal with the highest transmit power value after power backoff as the optimal reference signal required for uplink transmission based on the measurement result.

[0174] Optionally, a preset field is newly added in the MAC CE, and the preset field includes the request information; the terminal sends the request information to the network device through the MAC CE.

[0175] Optionally, the second auxiliary information further includes identification information of an optimal reference signal required for the uplink transmission.

[0176] Optionally, a preset field is added to the media access control layer control element MAC CE, and the preset field is used to indicate identification information of the optimal reference signal required for the uplink transmission; the terminal sends the second auxiliary information to the network device through the MAC CE.

[0177] Optionally, the notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

[0178] Optionally, before receiving the notification information sent by the network device, the method further includes:

[0179] Reporting capability information to the network device, wherein the capability information is used to indicate that the terminal has the capability of adding a power backoff value to calculation of an optimal reference signal.

[0180] Optionally, before sending the first auxiliary information to the network device according to the notification information, the method further includes:

[0181] Using each array face to measure the RSRP of the reference signal configured for the network device, the RSRP of the reference signal measured by each array face is obtained; according to the RSRP of the reference signal measured by each array face and the P-MPR value of each array face, the reference signal with the highest uplink transmit power value is determined, and the reference signal with the highest transmit power value is determined as the optimal reference signal required for the uplink transmission.

[0182] Optionally, the sending of auxiliary information to the network device includes any one of the following:

[0183] Periodically sending auxiliary information to the network device;

[0184] semi-persistently sending auxiliary information to the network device;

[0185] Auxiliary information is sent to the network device aperiodically.

[0186] Optionally, the sending the auxiliary information to the network device includes:

[0187] The auxiliary information is sent to the network device through a physical random access channel PRACH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH.

[0188] Optionally, the triggering condition of the MPE event includes:

[0189] The P-MPR value is greater than the preset backoff value within the preset time period; or, for any array, the RSRP estimated value of the uplink beam is less than the preset value.

[0190] Optionally, the uplink transmission includes PUCCH, PUSCH or channel sounding reference signal SRS.

[0191] It should be noted here that the above embodiment can implement all the method steps of the terminal side method embodiment and can achieve the same technical effect, and will not be repeated here.

[0192] Figure 4 This is a structural diagram of a network device provided in an embodiment of the present application, including a memory 420, a transceiver 400, and a processor 410.

[0193] Among them, Figure 4In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically various circuits linked together by one or more processors represented by processor 410 and memory represented by memory 420. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 400 may be a plurality of components, i.e., a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 may store data used by the processor 410 when performing operations.

[0194] The processor 410 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0195] The memory 420 is used to store computer programs; the transceiver 400 is used to send and receive data under the control of the processor; the processor 410 is used to read the computer program in the memory and perform the following operations:

[0196] Receive auxiliary information sent by the terminal, where the auxiliary information includes: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs;

[0197] Determining, based on the auxiliary information, a front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission;

[0198] Sending indication information to the terminal, wherein the indication information is used to indicate the front plane or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform new uplink beam scanning.

[0199] Optionally, when the auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal, the auxiliary information further includes:

[0200] MPE event; and / or, reference signal received power RSRP corresponding to one or more array planes.

[0201] Optionally, the auxiliary information includes first auxiliary information or second auxiliary information; and the auxiliary information sent by the receiving terminal includes:

[0202] sending notification information to the terminal, and receiving the first auxiliary information sent by the terminal according to the notification information, wherein the notification information is used to notify the terminal to report an optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or

[0203] The second auxiliary information sent by the terminal when an MPE event is detected is received, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal.

[0204] Optionally, the receiving the second auxiliary information sent by the terminal when detecting that an MPE event occurs further includes:

[0205] Receive request information sent by the terminal, where the request information is used to trigger the network device to send at least one channel state information reference signal CSI-RS for beam scanning, wherein the at least one CSI-RS is pre-associated with the array of the terminal; and send the at least one CSI-RS for beam scanning based on the request information.

[0206] Optionally, a preset field is newly added in the MAC CE, and the preset field includes the request information; the network device receives the request information sent by the terminal through the MAC CE.

[0207] Optionally, the second auxiliary information further includes identification information of an optimal reference signal required for the uplink transmission.

[0208] Optionally, a preset field is newly added in the media access control layer control element MAC CE, and the preset field is used to indicate identification information of the optimal reference signal required for the uplink transmission; the network device receives the second auxiliary information sent by the terminal through the MAC CE.

[0209] Optionally, the notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

[0210] Optionally, before sending the notification information to the terminal, the method further includes:

[0211] Capability information sent by the terminal is received, where the capability information is used to indicate that the terminal has the capability of adding a power backoff value to calculation of an optimal reference signal.

[0212] Optionally, the auxiliary information sent by the receiving terminal includes any one of the following:

[0213] receiving auxiliary information periodically sent by the terminal;

[0214] receiving auxiliary information semi-persistently sent by the terminal;

[0215] receiving auxiliary information aperiodically sent by the terminal.

[0216] Optionally, the auxiliary information sent by the receiving terminal includes:

[0217] The auxiliary information is received by the terminal through a physical random access channel PRACH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH.

[0218] Optionally, determining, according to the auxiliary information, a front or beam to be used for subsequent uplink transmission by the terminal includes:

[0219] When the auxiliary information includes identification information of an optimal reference signal required for uplink transmission, determining the front plane or beam corresponding to the optimal reference signal required for uplink transmission as the front plane or beam used by the terminal for subsequent uplink transmission; or

[0220] When the auxiliary information includes the P-MPR value corresponding to one or more arrays of the terminal, the array or beam with the highest uplink transmit power value is determined based on the P-MPR value corresponding to the one or more arrays of the terminal, and the array or beam with the highest uplink transmit power value is determined as the array or beam used for subsequent uplink transmission of the terminal.

[0221] Optionally, the triggering condition of the MPE event includes:

[0222] The P-MPR value is greater than the preset backoff value within the preset time period; or, for any array, the RSRP estimated value of the uplink beam is less than the preset value.

[0223] Optionally, the uplink transmission includes PUCCH, PUSCH or channel sounding reference signal SRS.

[0224] It should be noted here that the above embodiment can implement all the method steps of the network device side method embodiment and can achieve the same technical effect, and will not be repeated here.

[0225] Figure 5 This is a module block diagram of a front selection device provided in an embodiment of the present application, the device comprising:

[0226] The sending module 501 is configured to send auxiliary information to a network device, where the auxiliary information includes: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of a terminal when a maximum power radiation (MPE) event occurs.

[0227] The receiving module 502 is used to receive indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan.

[0228] Optionally, when the auxiliary information includes P-MPR values ​​corresponding to one or more arrays of the terminal, the auxiliary information further includes: MPE events; and / or reference signal received power RSRP corresponding to one or more arrays.

[0229] Optionally, the auxiliary information includes first auxiliary information or second auxiliary information; and the sending module includes:

[0230] a first sending unit, configured to receive notification information sent by the network device, and send the first auxiliary information to the network device according to the notification information, wherein the notification information is used to notify the terminal to report an optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or

[0231] The second sending unit is configured to send the second auxiliary information to the network device when the terminal detects that an MPE event occurs, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal.

[0232] Optionally, the sending the second auxiliary information to the network device further includes:

[0233] Sending a request message to the network device, where the request message is used to trigger the network device to send at least one channel state information reference signal CSI-RS for beam scanning, wherein the at least one CSI-RS is pre-associated with the array of the terminal; measuring the reference signal received power RSRP after power backoff corresponding to each CSI-RS, and determining the reference signal with the highest transmit power value after power backoff as the optimal reference signal required for uplink transmission based on the measurement result.

[0234] Optionally, a preset field is newly added in the MAC CE, and the preset field includes the request information; the terminal sends the request information to the network device through the MAC CE.

[0235] Optionally, the second auxiliary information further includes identification information of an optimal reference signal required for the uplink transmission.

[0236] Optionally, a preset field is added to the media access control layer control element MAC CE, and the preset field is used to indicate identification information of the optimal reference signal required for the uplink transmission; the terminal sends the second auxiliary information to the network device through the MAC CE.

[0237] Optionally, the notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

[0238] Optionally, before receiving the notification information sent by the network device, the method further includes:

[0239] A reporting unit is configured to report capability information to the network device, wherein the capability information is used to indicate that the terminal has the capability of adding a power backoff value to the calculation of an optimal reference signal.

[0240] Optionally, before sending the first auxiliary information to the network device according to the notification information, the method further includes:

[0241] a determination unit, configured to perform RSRP measurement on a reference signal configured for the network device using each array face to obtain the RSRP of the reference signal measured by each array face; determine, based on the RSRP of the reference signal measured by each array face and the P-MPR value of each array face, the reference signal with the highest uplink transmit power value, and determine the reference signal with the highest transmit power value as the optimal reference signal required for the uplink transmission.

[0242] Optionally, the sending module is configured to perform any one of the following:

[0243] Periodically sending auxiliary information to the network device;

[0244] semi-persistently sending auxiliary information to the network device;

[0245] Auxiliary information is sent to the network device aperiodically.

[0246] Optionally, the sending module is used to send the auxiliary information to the network device through a physical random access channel PRACH, a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH.

[0247] Optionally, the triggering condition of the MPE event includes: a P-MPR value greater than a preset backoff value within a preset time period; or, for any front, an RSRP estimation value of the uplink beam is less than a preset value.

[0248] Optionally, the uplink transmission includes PUCCH, PUSCH or channel sounding reference signal SRS.

[0249] It should be noted here that the above embodiment can implement all the method steps of the terminal side method embodiment and can achieve the same technical effect, and will not be repeated here.

[0250] Figure 6 This is a module block diagram of a front selection device provided in an embodiment of the present application, the device comprising:

[0251] A receiving module 601 is configured to receive auxiliary information sent by a terminal, where the auxiliary information includes: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs;

[0252] A determination module 602 is configured to determine, based on the auxiliary information, a front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission;

[0253] The sending module 603 is used to send indication information to the terminal, wherein the indication information is used to indicate the array or beam used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform new uplink beam scanning.

[0254] Optionally, when the auxiliary information includes P-MPR values ​​corresponding to one or more arrays of the terminal, the auxiliary information further includes: MPE events; and / or reference signal received power RSRP corresponding to one or more arrays.

[0255] Optionally, the auxiliary information includes first auxiliary information or second auxiliary information; and the receiving module includes:

[0256] a first receiving unit, configured to send notification information to the terminal, and receive the first auxiliary information sent by the terminal according to the notification information, wherein the notification information is used to notify the terminal to report an optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or

[0257] The second receiving unit is configured to receive the second auxiliary information sent by the terminal when detecting the occurrence of an MPE event, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal.

[0258] Optionally, the receiving the second auxiliary information sent by the terminal when detecting that an MPE event occurs further includes:

[0259] Receive request information sent by the terminal, where the request information is used to trigger the network device to send at least one channel state information reference signal CSI-RS for beam scanning, wherein the at least one CSI-RS is pre-associated with the array of the terminal; and send the at least one CSI-RS for beam scanning based on the request information.

[0260] Optionally, a preset field is newly added in the MAC CE, and the preset field includes the request information; the network device receives the request information sent by the terminal through the MAC CE.

[0261] Optionally, the second auxiliary information further includes identification information of an optimal reference signal required for the uplink transmission.

[0262] Optionally, a preset field is newly added in the media access control layer control element MAC CE, and the preset field is used to indicate identification information of the optimal reference signal required for the uplink transmission; the network device receives the second auxiliary information sent by the terminal through the MAC CE.

[0263] Optionally, the notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

[0264] Optionally, before sending the notification information to the terminal, the method further includes:

[0265] The third receiving unit is configured to receive capability information sent by the terminal, wherein the capability information is used to indicate that the terminal has the capability of adding a power backoff value to calculation of an optimal reference signal.

[0266] Optionally, the receiving module is configured to perform any one of the following:

[0267] receiving auxiliary information periodically sent by the terminal;

[0268] receiving auxiliary information semi-persistently sent by the terminal;

[0269] receiving auxiliary information aperiodically sent by the terminal.

[0270] Optionally, the receiving module is used to receive the auxiliary information sent by the terminal through a physical random access channel PRACH, a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH.

[0271] Optionally, the determining module is used to:

[0272] When the auxiliary information includes identification information of an optimal reference signal required for uplink transmission, determining the front plane or beam corresponding to the optimal reference signal required for uplink transmission as the front plane or beam used by the terminal for subsequent uplink transmission; or

[0273] When the auxiliary information includes the P-MPR value corresponding to one or more arrays of the terminal, the array or beam with the highest uplink transmit power value is determined based on the P-MPR value corresponding to the one or more arrays of the terminal, and the array or beam with the highest uplink transmit power value is determined as the array or beam used for subsequent uplink transmission of the terminal.

[0274] Optionally, the triggering condition of the MPE event includes: a P-MPR value greater than a preset backoff value within a preset time period; or, for any front, an RSRP estimation value of the uplink beam is less than a preset value.

[0275] Optionally, the uplink transmission includes PUCCH, PUSCH or channel sounding reference signal SRS.

[0276] It should be noted here that the above embodiment can implement all the method steps of the network device side method embodiment and can achieve the same technical effect, and will not be repeated here.

[0277] It should be noted that the division of units in the embodiments of the present application is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0278] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0279] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0280] On the other hand, an embodiment of the present application further provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the method described in the above embodiment.

[0281] The processor-readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO)), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NANDFLASH), solid-state drives (SSDs)), etc.

[0282] As can be seen from the above embodiments, the processor-readable storage medium stores a computer program, and the computer program is used to enable the processor to execute the above-mentioned front selection method.

[0283] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) that contain computer-usable program code.

[0284] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0285] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce an article of manufacture comprising an instruction device that implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0286] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are performed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0287] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A front selection method, characterized in that: include: Sending auxiliary information to the network device, the auxiliary information including: identification information of the optimal reference signal required for uplink transmission or the maximum power fallback (P-MPR) value based on the array corresponding to one or more arrays of the terminal when the maximum power radiation (MPE) event occurs; receiving indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate a front or beam to be used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan; The auxiliary information includes first auxiliary information or second auxiliary information; and the sending of the auxiliary information to the network device includes: receiving notification information sent by the network device, and sending the first auxiliary information to the network device according to the notification information, wherein the notification information is used to notify the terminal to report the optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or When the terminal detects that an MPE event occurs, sending the second auxiliary information to the network device, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal; The sending of the second auxiliary information to the network device further includes: Sending a request message to the network device, where the request message is used to trigger the network device to send at least one channel state information reference signal (CSI-RS) for beam scanning, where the at least one CSI-RS is pre-associated with a front plane of the terminal; Measure the reference signal received power (RSRP) after power backoff corresponding to each CSI-RS, and based on the measurement results, determine the reference signal with the highest transmit power value after power backoff as the optimal reference signal required for uplink transmission; The notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

2. The method for selecting a front according to claim 1, wherein: When the auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal, the auxiliary information further includes: MPE events; and / or, The reference signal received power RSRP corresponding to one or more array planes.

3. The method for selecting a front according to claim 1, wherein: A preset field is newly added in the MAC CE, and the preset field includes the request information; The terminal sends the request information to the network device through the MAC CE.

4. The method for selecting a front according to claim 1, wherein: The second auxiliary information further includes identification information of the optimal reference signal required for the uplink transmission.

5. The method for selecting a front according to claim 4, wherein: A preset field is newly added in the media access control layer control element MAC CE, and the preset field is used to indicate the identification information of the optimal reference signal required for the uplink transmission; The terminal sends the second auxiliary information to the network device through the MAC CE.

6. The method for selecting a front according to claim 1, wherein: Before receiving the notification information sent by the network device, the method further includes: Reporting capability information to the network device, wherein the capability information is used to indicate that the terminal has the capability of adding a power backoff value to calculation of an optimal reference signal.

7. The method for selecting a front according to claim 1, wherein: Before sending the first auxiliary information to the network device according to the notification information, the method further includes: Use each array to measure the RSRP of the reference signal configured by the network device to obtain the RSRP of the reference signal measured by each array; According to the RSRP of the reference signal measured by each array face and the P-MPR value of each array face, the reference signal with the highest uplink transmit power value is determined, and the reference signal with the highest transmit power value is determined as the optimal reference signal required for the uplink transmission.

8. The method for selecting a front according to any one of claims 1 to 3, characterized in that: The sending of auxiliary information to the network device includes any one of the following: Periodically sending auxiliary information to the network device; semi-persistently sending auxiliary information to the network device; Auxiliary information is sent to the network device aperiodically.

9. The method for selecting a front according to any one of claims 1 to 3, characterized in that: The sending of auxiliary information to the network device includes: The auxiliary information is sent to the network device through a physical random access channel PRACH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH.

10. The method for selecting a front according to claim 1, wherein: The triggering conditions of the MPE event include: The P-MPR value within the preset period is greater than the preset fallback value; or, For any beam, the RSRP estimate of the uplink beam is less than the preset value.

11. The method for selecting a front according to claim 1, wherein: The uplink transmission includes PUCCH, PUSCH or channel sounding reference signal SRS.

12. A front selection method, characterized in that: include: Receive auxiliary information sent by the terminal, where the auxiliary information includes: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs; Determining, based on the auxiliary information, a front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission; Sending indication information to the terminal, wherein the indication information is used to indicate a front plane or beam to be used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan; The auxiliary information includes first auxiliary information or second auxiliary information; the auxiliary information sent by the receiving terminal includes: sending notification information to the terminal, and receiving the first auxiliary information sent by the terminal according to the notification information, wherein the notification information is used to notify the terminal to report an optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or receiving the second auxiliary information sent by the terminal when detecting an MPE event, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal; The receiving of the second auxiliary information sent by the terminal when the MPE event is detected further includes: receiving a request message sent by the terminal, where the request message is used to trigger a network device to send at least one channel state information reference signal (CSI-RS) for beam scanning, where the at least one CSI-RS is pre-associated with a beam plane of the terminal; Sending the at least one CSI-RS for beam scanning based on the request information; The notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

13. The method for selecting a front according to claim 12, wherein: When the auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal, the auxiliary information further includes: MPE events; and / or, The reference signal received power RSRP corresponding to one or more array planes.

14. The method for selecting a front according to claim 12, wherein: A preset field is newly added in the MAC CE, and the preset field includes the request information; The network device receives the request information sent by the terminal through the MAC CE.

15. The method for selecting a front according to claim 12, wherein: The second auxiliary information further includes identification information of the optimal reference signal required for the uplink transmission.

16. The method for selecting a front according to claim 15, wherein: A preset field is newly added to the media access control layer control element MACCE, where the preset field is used to indicate identification information of the optimal reference signal required for the uplink transmission; The network device receives the second auxiliary information sent by the terminal through the MAC CE.

17. The method for selecting a front according to claim 12, wherein: Before sending the notification information to the terminal, the method further includes: Capability information sent by the terminal is received, where the capability information is used to indicate that the terminal has the capability of adding a power backoff value to calculation of an optimal reference signal.

18. The method for selecting a front according to any one of claims 12 to 14, characterized in that: The auxiliary information sent by the receiving terminal includes any one of the following: receiving auxiliary information periodically sent by the terminal; receiving auxiliary information semi-persistently sent by the terminal; receiving auxiliary information aperiodically sent by the terminal.

19. The method for selecting a front according to any one of claims 12 to 14, characterized in that: The auxiliary information sent by the receiving terminal includes: The auxiliary information is received by the terminal through a physical random access channel PRACH, a physical uplink control channel PUCCH, or a physical uplink shared channel PUSCH.

20. The method for selecting a front according to claim 12, wherein: Determining, according to the auxiliary information, a front plane or beam used for subsequent uplink transmission by the terminal, including: When the auxiliary information includes identification information of an optimal reference signal required for uplink transmission, determining the front plane or beam corresponding to the optimal reference signal required for uplink transmission as the front plane or beam used by the terminal for subsequent uplink transmission; or When the auxiliary information includes the P-MPR value corresponding to one or more arrays of the terminal, the array or beam with the highest uplink transmit power value is determined based on the P-MPR value corresponding to the one or more arrays of the terminal, and the array or beam with the highest uplink transmit power value is determined as the array or beam used for subsequent uplink transmission of the terminal.

21. The method for selecting a front according to claim 12, wherein: The triggering conditions of the MPE event include: The P-MPR value within the preset period is greater than the preset fallback value; or, For any beam, the RSRP estimate of the uplink beam is less than the preset value.

22. The method for selecting a front according to claim 12, wherein: The uplink transmission includes PUCCH, PUSCH or channel sounding reference signal SRS.

23. A terminal, characterized in that: Including memory, transceiver, processor: a memory for storing computer programs; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Sending auxiliary information to the network device, the auxiliary information including: identification information of the optimal reference signal required for uplink transmission or the maximum power fallback (P-MPR) value based on the array corresponding to one or more arrays of the terminal when the maximum power radiation (MPE) event occurs; receiving indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate a front or beam to be used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan; The auxiliary information includes first auxiliary information or second auxiliary information; and the sending of the auxiliary information to the network device includes: receiving notification information sent by the network device, and sending the first auxiliary information to the network device according to the notification information, wherein the notification information is used to notify the terminal to report the optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or When the terminal detects that an MPE event occurs, sending the second auxiliary information to the network device, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal; The sending of the second auxiliary information to the network device further includes: Sending a request message to the network device, where the request message is used to trigger the network device to send at least one channel state information reference signal (CSI-RS) for beam scanning, where the at least one CSI-RS is pre-associated with a front plane of the terminal; Measure the reference signal received power (RSRP) after power backoff corresponding to each CSI-RS, and based on the measurement results, determine the reference signal with the highest transmit power value after power backoff as the optimal reference signal required for uplink transmission; The notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

24. A network device, characterized in that: Including memory, transceiver, processor: a memory for storing computer programs; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Receive auxiliary information sent by the terminal, where the auxiliary information includes: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs; Determining, based on the auxiliary information, a front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission; Sending indication information to the terminal, wherein the indication information is used to indicate a front plane or beam to be used by the terminal for subsequent uplink transmission, or to instruct the terminal to perform a new uplink beam scan; The auxiliary information includes first auxiliary information or second auxiliary information; the auxiliary information sent by the receiving terminal includes: sending notification information to the terminal, and receiving the first auxiliary information sent by the terminal according to the notification information, wherein the notification information is used to notify the terminal to report an optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or receiving the second auxiliary information sent by the terminal when detecting an MPE event, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal; The receiving of the second auxiliary information sent by the terminal when the MPE event is detected further includes: receiving request information sent by the terminal, where the request information is used to trigger the network device to send at least one channel state information reference signal (CSI-RS) for beam scanning, where the at least one CSI-RS is pre-associated with a beam plane of the terminal; Sending the at least one CSI-RS for beam scanning based on the request information; The notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

25. A surface selection device, characterized in that: include: A sending module is configured to send auxiliary information to the network device, where the auxiliary information includes: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs; a receiving module, configured to receive indication information sent by the network device based on the auxiliary information, wherein the indication information is used to indicate a front plane or beam to be used for subsequent uplink transmission by the terminal, or to instruct the terminal to perform a new uplink beam scan; The auxiliary information includes first auxiliary information or second auxiliary information; and the sending of the auxiliary information to the network device includes: receiving notification information sent by the network device, and sending the first auxiliary information to the network device according to the notification information, wherein the notification information is used to notify the terminal to report the optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or When the terminal detects that an MPE event occurs, sending the second auxiliary information to the network device, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal; The sending of the second auxiliary information to the network device further includes: Sending a request message to the network device, where the request message is used to trigger the network device to send at least one channel state information reference signal (CSI-RS) for beam scanning, where the at least one CSI-RS is pre-associated with a front plane of the terminal; Measure the reference signal received power (RSRP) after power backoff corresponding to each CSI-RS, and based on the measurement results, determine the reference signal with the highest transmit power value after power backoff as the optimal reference signal required for uplink transmission; The notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

26. A surface selection device, characterized in that: include: A receiving module is configured to receive auxiliary information sent by a terminal, the auxiliary information including: identification information of an optimal reference signal required for uplink transmission or a maximum power fallback (P-MPR) value based on a front plane corresponding to one or more front planes of the terminal when a maximum power radiation (MPE) event occurs; a determination module, configured to determine, based on the auxiliary information, a front or beam to be used by the terminal for new uplink beam scanning or subsequent uplink transmission; a sending module, configured to send indication information to the terminal, wherein the indication information is used to indicate a front plane or beam to be used for subsequent uplink transmission by the terminal, or to instruct the terminal to perform a new uplink beam scan; The auxiliary information includes first auxiliary information or second auxiliary information; the auxiliary information sent by the receiving terminal includes: sending notification information to the terminal, and receiving the first auxiliary information sent by the terminal according to the notification information, wherein the notification information is used to notify the terminal to report an optimal reference signal required for uplink transmission, and the first auxiliary information includes identification information of the optimal reference signal required for uplink transmission; or receiving the second auxiliary information sent by the terminal when detecting an MPE event, wherein the second auxiliary information includes P-MPR values ​​corresponding to one or more fronts of the terminal; The receiving of the second auxiliary information sent by the terminal when the MPE event is detected further includes: receiving a request message sent by the terminal, where the request message is used to trigger a network device to send at least one channel state information reference signal (CSI-RS) for beam scanning, where the at least one CSI-RS is pre-associated with a beam plane of the terminal; Sending the at least one CSI-RS for beam scanning based on the request information; The notification information is further used to notify the terminal to report the RSRP after power backoff, and the first auxiliary information also includes the RSRP after power backoff.

27. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a computer program, and the computer program is used to enable a processor to execute the method according to any one of claims 1 to 11, or execute the method according to any one of claims 12 to 22.

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