Information transmission method and device, storage medium and program product

Abstract

The embodiment of the invention provides an information transmission method and device, a storage medium and a program product, relates to the technical field of communication, and can improve the accuracy of SRS power configuration. The method comprises the following steps: sending first information, wherein the first information is used for representing the sounding reference signal (SRS) sending capability of a first node.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to an information transmission method, device, storage medium and program product. Background Art

[0002] In a wireless communication network, a terminal can transmit a sounding reference signal (SRS) to a base station through the SRS transmission power configured by the base station, so that the base station can perform channel estimation, etc. However, when the base station configures the SRS transmission power for the terminal, the SRS power configuration may be inaccurate. Summary of the invention

[0003] The embodiments of the present disclosure provide an information transmission method, device, storage medium, and program product, which can improve the accuracy of SRS power configuration.

[0004] On the one hand, an information transmission method is provided, comprising: sending first information, where the first information is used to characterize a sounding reference signal (SRS) sending capability of the first node.

[0005] On the other hand, an information transmission method is provided, comprising: receiving first information, where the first information is used to characterize an SRS sending capability of a first node.

[0006] On the other hand, an information transmission device is provided, including: a sending unit; the sending unit is used to send first information, where the first information is used to characterize the sounding reference signal SRS sending capability of the first node.

[0007] On the other hand, an information transmission device is provided, including: a receiving unit; the receiving unit is used to receive first information, where the first information is used to characterize the SRS sending capability of the first node.

[0008] On the other hand, a communication node is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store a computer program; and the processor implements the information transmission method described in any of the above embodiments when executing the computer program.

[0009] On the other hand, a computer-readable storage medium is provided, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the information transmission method described in any of the above embodiments is implemented.

[0010] On the other hand, a computer program product is provided, which includes computer program instructions, and when the computer program instructions are executed by a processor, the information transmission method described in any of the above embodiments is implemented.

[0011] The disclosed embodiment discloses that a first node can send first information for characterizing the SRS transmission capability of the first node. Since the SRS transmission capability is the actual SRS transmission capability reported by the first node, the second node can configure SRS power information for the first node more accurately according to the SRS transmission capability. In this way, the second node can control the SRS power more accurately, thereby improving the channel estimation accuracy, etc., and improving the overall performance of the communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings required for use in some embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and a person skilled in the art can also obtain other drawings based on these drawings.

[0013] Figure 1 A schematic diagram of an antenna transmission provided in some embodiments of the present disclosure;

[0014] Figure 2 A communication system architecture diagram provided for some embodiments of the present disclosure;

[0015] Figure 3 A schematic diagram of a method for transmitting information provided in some embodiments of the present disclosure Figure 1 ;

[0016] Figure 4 A structural schematic diagram of an antenna configuration provided for some embodiments of the present disclosure;

[0017] Figure 5 A schematic diagram of SRS insertion loss capability information provided in some embodiments of the present disclosure Figure 1 ;

[0018] Figure 6 A schematic diagram of SRS insertion loss capability information provided in some embodiments of the present disclosure Figure 2 ;

[0019] Figure 7 A schematic diagram of SRS insertion loss capability information provided in some embodiments of the present disclosure Figure 3 ;

[0020] Figure 8 A schematic diagram of a method for transmitting information provided in some embodiments of the present disclosure Figure 2 ;

[0021] Fig. 9 A schematic diagram of a process of querying request information provided in some embodiments of the present disclosure;

[0022] Fig.10A schematic diagram of transmitting an SRS with different SRS transmission powers provided in some embodiments of the present disclosure;

[0023] Fig.11 An interaction flow chart of a second node provided for some embodiments of the present disclosure;

[0024] Fig.12 A schematic diagram of a communication device provided in some embodiments of the present disclosure Figure 1 ;

[0025] Fig.13 A schematic diagram of a communication device provided in some embodiments of the present disclosure Figure 2 ;

[0026] Fig.14 A schematic diagram of a communication device provided in some embodiments of the present disclosure Figure 3 . DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the present disclosure to clearly and completely describe the technical solutions in the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0028] It should be noted that, in the present disclosure, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present disclosure should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0029] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0030] In the description of the present disclosure, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more.

[0031] In the fifth generation mobile communication technology (5G) communication network, beamforming and other technologies can be supported. The base station can transmit to the terminal in a directional manner. However, if the base station wants to transmit in a directional manner, it needs to detect the location of the terminal, the quality of the channel and other information. In view of this, a direct way is to Figure 1 As shown, the first node can send SRS in turn on all antennas (or antenna ports) in an antenna switching manner, so that the base station can detect information such as the location of the terminal and the quality of the channel based on the received SRS.

[0032] At present, terminals generally support 1 / 2 / 4 antennas for transmission or 2 / 4 / 6 / 8 antennas for reception. The terminal can send SRS alternately on the transmit antenna and the receive antenna. For example, for a terminal with 2 transmit and 8 receive (i.e., two transmit antennas and 8 receive antennas), the terminal supports sending SRS alternately among eight antennas, selecting two antennas to send SRS each time. However, since the RF front-end design of different antennas may be different, and the RF front-end design is related to the operating frequency band, the insertion loss (IL) experienced by the terminal when transmitting SRS at different antenna ports is inconsistent.

[0033] When transmitting SRS, the terminal can transmit SRS to the base station through the SRS transmission power configured by the base station, so that the base station can perform channel estimation. However, when the base station determines the SRS transmission power, it uses a preset insertion loss difference (i.e., ΔT RxSRS ). Since this value is the insertion loss difference, and is often a poor value, usually a large value, this will result in a smaller maximum configurable SRS transmit power. However, in actual scenarios, the SRS insertion loss difference caused by factors such as loss compensation done by the terminal itself or changes in the RF link will be better than the above-mentioned indicator value, that is, smaller than the above-mentioned indicator value. In this way, the SRS transmit power configurable by the terminal will be greater than the SRS maximum transmit power determined by the base station based on the indicator value. Therefore, when the base station determines the SRS transmit power based on the above-mentioned indicator value, it will cause inaccurate SRS power control, resulting in inaccurate channel estimation of the receiver and incorrect precoding matrix (precoding matrix indicator, PMI) selection, reducing the overall performance of the system.

[0034] In this regard, an embodiment of the present disclosure provides an information transmission method, where a first node can send first information for characterizing the SRS transmission capability of the first node. Since the SRS transmission capability is the actual SRS transmission capability reported by the first node, the second node can configure SRS power information for the first node more accurately according to the SRS transmission capability. In this way, the second node can control the SRS power more accurately, thereby improving the channel estimation accuracy, etc., and improving the overall performance of the communication system.

[0035] The information transmission method provided by the embodiments of the present disclosure can be applied to systems of various communication formats. For example, the information transmission provided by the embodiments of the present disclosure can be applied to systems including, but not limited to, long term evolution (LTE) systems, various versions based on LTE evolution, fifth generation mobile communication technology (5G) systems, and other communication systems. In addition, the information transmission method provided by the embodiments of the present disclosure can also be applied to future-oriented communication systems, etc.

[0036] Exemplarily, the above information transmission method can be applied to Figure 2 In the communication system, Figure 2 As shown, the communication system includes: a first node 201 and a second node 202.

[0037] The first node 201 and the second node 202 are in communication connection. The first node 201 may be at least one of the following: a terminal, a user equipment (UE), a relay node (Relay) with a relay function, a transmitting point, an Internet of Things device, and other transmitting devices. The second node 202 may be at least one of the following: a base station (BS), a relay node (Relay) with a relay function, a receiving point, and other transmitting devices. Figure 2 An example is given in which the first node 201 is a terminal and the second node 202 is a base station.

[0038] In the embodiment of the present disclosure, the first node 201 may send first information indicating the SRS transmission capability to the second node 202. The second node 202 may receive the first information sent by the first node 201, and based on the first information, send second information indicating the SRS power configuration information of the first node to the first node 201. In this way, since the SRS transmission capability is the actual capability reported by the first node, the power configuration information determined by the second node 202 based on the capability is more accurate, so that the SRS power information can be configured for the first node 201 more accurately, and further, the accuracy of channel estimation can be improved, and the overall performance of the communication system can be improved.

[0039] It should be noted that Figure 2 This is just an exemplary framework diagram. Figure 2 The number of devices included in the Figure 2 In addition to the devices shown, the communication system may also include other devices, such as relay nodes, etc.

[0040] The application scenarios of the embodiments of the present disclosure are not limited. The system architecture and business scenarios described in the embodiments of the present disclosure are intended to more clearly illustrate the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. It is known to those skilled in the art that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0041] The information transmission method provided by the embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0042] The information transmission method provided by the embodiment of the present disclosure can be applied to Figure 2 A first node 201 in a communication system is shown. Figure 3 A schematic diagram showing a process of information transmission method Figure 1 ,like Figure 3 As shown, the information transmission method includes the following S301.

[0043] S301. Send first information.

[0044] The first information is used to characterize the SRS sending capability of the first node.

[0045] In a possible implementation manner, the SRS transmission capabilities of multiple antenna ports of the first node may be different. Therefore, in order to report the SRS transmission capability of the antenna port of the first node,

[0046] The first node may send first information to the second node. It should be understood that the first information includes the SRS transmission capability of at least one antenna port among all antenna ports of the first node.

[0047] In this way, since the SRS sending capability is the actual capability of the first node, it is more accurate than the preset insertion loss difference. Therefore, the SRS power information configured for the first node through the SRS sending capability is more accurate, thereby improving the accuracy of SRS power control and the accuracy of channel estimation, thereby further improving the overall system performance.

[0048] In a possible implementation manner, after the first node sends the first information, the first node may receive second information, wherein the second information is used to indicate SRS power configuration information of the first node.

[0049] After receiving the first information sent by the first node, the second node can determine the SRS transmission capability of the first node. Since the SRS transmission capability is the real capability sent by the first node, the SRS power configuration information determined by the second node based on the SRS transmission capability is more accurate. Afterwards, the second node can send second information to the first node to indicate the SRS power configuration information of the first node. In this way, the first node can configure the SRS transmission power based on more accurate SRS power configuration information, so that the second node can control the SRS power more accurately, and further, the channel information estimated by the second node based on the SRS can be more accurate, thereby improving the transmission performance of the communication system.

[0050] In a possible implementation, the first information includes at least one of the following: frequency domain resource information, antenna configuration information, SRS transmit power related to M antenna ports, SRS insertion loss capability information related to M antenna ports, path loss information related to M antenna ports, SRS resource set, configuration information of the SRS resource set, and SRS maximum transmit power of M antenna ports, where M is a positive integer. The M antenna ports are at least one of all antenna ports of the first node. The various information included in the first information will be described below.

[0051] (1) Frequency domain resource information

[0052] The frequency domain resource information may include the frequency domain resources required for sending the SRS, and may also include the frequency domain resources (such as frequency bands, etc.) for the operation of at least one antenna port. The frequency domain resource information may be a frequency band defined in a wireless spectrum, such as an operating band in FR1 (operating bands in Frequency Range 1, which ranges from 410 megahertz (MHz) to 7125MHz), operating bands in FR2 (Frequency Range 2, which ranges from 24250MHz to 52600MHz), and other frequency bands defined for these frequency ranges and other frequency ranges (such as above 52600MHz) defined subsequently; the frequency band may also be a K band, an S band, an ultrahigh frequency (UHF), an extremely high frequency (EHF), and other bands.

[0053] The frequency domain resource information can be a component carrier of a certain bandwidth within a frequency band. For example, the commonly used bandwidths include 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, 25MHz, 30MHz, 35MHz, 40MHz, 45MHz, 50MHz, 55MHz, 60MHz, 70MHz, 80MHz, 90MHz, 100MHz corresponding to FR1 and other bandwidths introduced later; different component carriers within or between frequency bands can be aggregated together, that is, carrier aggregation technology, to form a larger aggregate bandwidth.

[0054] The frequency domain resource information may also be a bandwidth part (BWP), which is a spectrum resource block in the total available bandwidth within the carrier.

[0055] (2) Antenna configuration information

[0056] The antenna configuration information is the number of antennas used by the first node to transmit data and the number of antennas used to receive data, recorded as xTyR (x and y are both positive integers, x<=y), which means x transmitting antennas and y receiving antennas. For example, for 5G terminals (such as mobile phones, customer premises equipment (CPE) / fixed wireless access (FWA) equipment), the commonly used antenna configuration information supported includes 1T2R, 1T4R, 1T8R, 2T2R, 2T4R, 2T8R, 4T4R, 4T8R and other antenna configuration information introduced later.

[0057] For example, Figure 4FIG. 1 shows a schematic diagram of a structure of an antenna configuration. Figure 4 As shown, in the antenna configuration information xTyR of the transceiver unit of the terminal, x antennas are used for transmission or reception, and (yx) antennas are only used for reception. Then the antenna port indexes of the transmitting antenna include #1, #2...#x; and the antenna port indexes of the receiving antenna include #x+1...#y-1, #y.

[0058] It should be noted that the transceiver unit supports the transmission and reception of a single component carrier or multiple component carriers in a frequency band, and also supports the transmission and reception of multiple component carriers in multiple frequency bands. In general, the transceiver unit includes modules such as baseband processing, intermediate frequency processing, RF processing (including RF front-end amplifier, duplex filter, etc.) and its auxiliary circuits, among which RF processing includes RF devices such as RF filter, RF duplexer, RF amplifier, RF low noise amplifier, etc. It can also include an antenna selection module, including some commonly used multi-way switching devices such as single pole double throw (SPDT), double pole double throw (DPDT), etc.

[0059] (3) SRS resource set

[0060] In the 5G NR system, the second node can indicate one or more SRS resource sets (SRS resource set) to the first node through high-level radio resource control (RRC) parameters. Each SRS resource set can include one or more SRS resources, and each SRS resource occupies time-frequency domain resources. For example, the SRS resource can be configured in the time domain in the last six orthogonal frequency division multiplexing (OFDM) symbols of a time slot, which can be 1, 2 or 4 consecutive symbols; the SRS resource supports a variety of SRS bandwidth configurations in the frequency domain, ranging from 4 to 272 resource blocks (RBs), and the value is an integer multiple of 4.

[0061] (4) Configuration information of SRS resource set

[0062] The configuration information of the SRS resource set may include the purpose of the SRS resource set, such as the purpose of antenna switching, and may also include the use case of the SRS resource set, such as the use case of antenna switching of the SRS resource set. The use case of SRS resources is configured by high-level parameters. At present, the use cases of SRS resource sets may include beam management, codebook, non-codebook, and antenna switching. When the high-level configuration usage is antenna switching, and the first node supports the SRS antenna switching capability, the first node may report different SRS antenna switching capability indications, which are xTyR under different x and y combinations, expressed in the form of txry or tarb-tcrd-..-txry. The SRS antenna switching capability indication reported by the first node may be a specific txry or tarb-tcrd-..-txry value, or may be indicated in the form of bitmaps.

[0063] It should be noted that the SRS antenna switching capability indication txry supported by the first node includes t1r1, t2r2, t1r2, t4r4, t2r4, t1r4, t2r6, t1r6, t4r8, t2r8, t1r8 and the SRSantenna switching capability indication txry introduced subsequently, such as t3r6, t4r6, etc. The SRS antenna switching capability indication tarb-tcrd-..-txry supported by the first node includes t1r1, t2r2, t1r2, t4r4, t2r4, t1r4, t2r6, t1r6, t4r8, t2r8, t1r8 and any combination of two or more capability indications in the SRS antenna switching capability indication introduced subsequently, such as t1r1-t2r2, t1r1-t1r2-t1r4, t1r1-t1r2-t2r2-t2r4, t1r1-t1r2-t2r2-t1r4-t2r4, etc.

[0064] Exemplarily, the use case of high-level configuration of the SRS resource set is antenna switching, and the manner in which the first node reports the SRS antenna switching capability includes:

[0065] If the capability indication is t1r8 or includes the t1r8 capability indication (such as t1r8-t2r8), the first node will send the SRS in turn among a total of 8 transmit and receive antennas in all configured SRS resource sets (each resource set contains an SRS), selecting one antenna at a time to send, that is, selecting one antenna each time from the #1, #2, #3, #4, #5, #6, #7 and #8 antennas to send the SRS in turn.

[0066] If the capability indication is t2r8 or includes the t2r8 capability indication (such as t1r8-t2r8), the first node will send the SRS alternately among a total of 8 transmit and receive antennas in all configured SRS resource sets (each resource set contains two SRSs), and select two antennas to send at a time, that is, select two antennas each time from the #1, #2, #3, #4, #5, #6, #7 and #8 antennas to send the SRS alternately, for example, select {#1, #2}, {#3, #4}, {#5, #6}, {#7, #8} to send the SRS alternately, where {#m, #n} are the antenna port indices corresponding to the two SRSs in each resource set.

[0067] (5) SRS insertion loss capability information

[0068] It should be understood that SRS insertion loss is generally caused by the path loss experienced by the SRS signal from the RF front-end power amplifier or low noise amplifier to the antenna. The path loss is the sum of all insertion losses including filter, wiring loss, line loss, multi-way switch internal insertion loss, etc.

[0069] In some embodiments, the SRS insertion loss capability information includes at least one of the following: an insertion loss value, an insertion loss capability level, and an antenna port index. The SRS insertion loss capability level is used to indicate the size of the insertion loss value, and an insertion loss capability level may correspond to an insertion loss threshold and an insertion loss value in the SRS insertion loss capability information.

[0070] In this case, when configuring the SRS transmission power, the second node does not need to determine the maximum SRS transmission power through a predefined insertion loss difference, but can determine the maximum SRS transmission power through an insertion loss difference determined by the actual insertion loss values ​​of all antenna indexes reported by the first node. Since the insertion loss difference determined by the actual insertion loss values ​​of all antenna indexes reported by the first node is smaller than the preset insertion loss difference, the maximum SRS transmission power determined by the second node based on the smaller insertion loss difference will be larger. In this way, the first node can transmit the SRS with a higher power, thereby improving the transmission quality of the SRS.

[0071] Exemplarily, Table 1 shows a schematic table of insertion loss capability levels.

[0072] Table 1

[0073] Insertion loss capability level Insertion loss threshold (dB) SRS IL 1 Threshold_1 SRS IL≤Threshold_1 2 Threshold_2 SRS IL≤Threshold_2 ... ... ... n Threshold_N SRS IL≤Threshold_N

[0074] Among them, the insertion loss capability level (also called SRS insertion loss capability level) includes 1, 2...n, and each insertion loss capability level corresponds to an insertion loss threshold. For example, the insertion loss threshold corresponding to the insertion loss capability level 2 is Threshold_1, and the insertion loss threshold is the maximum SRS IL under this level, and the threshold increases with the increase of the insertion loss capability level. For example, the reported insertion loss value (SRS IL) corresponding to the insertion loss capability level 2 is less than or equal to Threshold_1.

[0075] The antenna port index is used to associate the insertion loss value and / or the insertion loss capability level. Since the insertion loss capabilities of multiple antenna ports may be different, the insertion loss value corresponding to each antenna port can be reported through the first information. Therefore, in the SRS insertion loss capability information, an antenna port index can correspond to one or more insertion loss values ​​and / or one or more insertion loss thresholds. For example, the SRS insertion loss capability information may be {SRS antenna m, SRS IL class n}, where antenna is used to represent the antenna port index, and SRS IL class is used to represent the insertion loss capability level, m=0,1,2,3...y,n=1,2,...N,y>=2,N>1. Optionally, the antenna port index is a way to distinguish the antenna port of the first node. The embodiments of the present disclosure do not limit other ways to distinguish the antenna ports, such as distinguishing the antenna ports by resources or resource sets.

[0076] The SRS insertion loss capability information may report the insertion loss values ​​of the M antenna ports in a variety of ways. For example, the number of antenna port indexes and insertion loss capability levels (or insertion loss values) in the SRS insertion loss capability information may be the same or different. The following describes various ways of reporting the SRS insertion loss capability information for the M antenna ports. It should be understood that the M antenna ports are all or part of the antenna ports of the first node.

[0077] In a possible implementation, the insertion loss capability levels (or insertion loss values) corresponding to the M antenna port indexes may be the same or different, which is not limited in the embodiment of the present disclosure.

[0078] Mode 1: SRS insertion loss capability information includes an insertion loss capability level (or an insertion loss value). This insertion loss capability level (or insertion loss value) is the insertion loss capability level (or insertion loss value) of the M antenna ports, that is, the insertion loss capability levels (or insertion loss values) of the M antenna ports are the same. Therefore, only one insertion loss capability level (or one insertion loss value) can be reported in the SRS insertion loss capability information without reporting the antenna port index, thereby saving fields and transmission resources.

[0079] Mode 2: When the number of insertion loss capability levels (or insertion loss values) and antenna port indexes in the SRS insertion loss capability information is the same, the SRS insertion loss capability information includes M insertion loss capability levels, and one antenna port index corresponds to (or is applied to) one insertion loss capability level (or one insertion loss value). The SRS insertion loss capability information includes M antenna port indexes and M insertion loss capability levels. In this way, one antenna port index can correspond to one insertion loss capability level, and the insertion loss capability level of each antenna port in the M antenna ports can be reported, so that the SRS insertion loss capability of each antenna port reported can be clearer.

[0080] Mode 3: When the number of insertion loss capability levels (or insertion loss values) and antenna port indexes in the SRS insertion loss capability information is different, the SRS insertion loss capability information includes a first insertion loss capability level, N insertion loss capability levels, and N antenna port indexes. Among them, the number of the first insertion loss capability level is 1, and the N antenna ports indicated by the N antenna port indexes correspond to the N insertion loss capability levels; the first insertion loss capability level corresponds to the other antenna ports except the N antenna ports among the M antenna ports, and N is a positive integer and is not greater than M. In this way, when the insertion loss capability levels (or insertion loss values) of MN antenna ports among the M antenna ports are the same, and the insertion loss capability levels of the remaining N antenna ports are different from the insertion loss capability levels of the above-mentioned MN antenna ports, the insertion loss capability level corresponding to each antenna port index can be reported for the N antenna port indexes, thereby saving resources and transmission resources.

[0081] However, for the MN antenna ports, since the insertion loss capability levels of these antenna port indexes are the same, only one insertion loss capability level may be reported, and there is no need to report the MN antenna port indexes. After receiving the SRS insertion loss capability information, the second node determines that the first insertion loss capability level has no corresponding antenna port index, and then determines that the first insertion loss capability level is the common insertion loss capability level of the MN antenna port indexes.

[0082] In some embodiments, the SRS insertion loss capability information includes an insertion loss capability level n; n is a positive integer; when n is greater than 1, the insertion loss value in the SRS insertion loss capability information corresponding to the insertion loss capability level n does not exceed the insertion loss threshold corresponding to the insertion loss capability level n-1; when n is equal to 1, the insertion loss value in the insertion loss capability information corresponding to the insertion loss capability level n is the insertion loss threshold corresponding to the insertion loss capability level n.

[0083] When the reported SRS insertion loss capability level is n (the corresponding insertion loss threshold is Threshold_N), the insertion loss value reported in the SRS insertion loss capability information corresponding to the insertion loss capability level n shall not exceed the insertion loss threshold (Threshold_N-1) corresponding to the next adjacent insertion loss capability level (i.e., n-1). Optionally, when the insertion loss capability level is the lowest level (e.g., level 1, the corresponding insertion loss threshold is Threshold_1), the reported insertion loss value corresponding to the insertion loss capability level is the insertion loss threshold (i.e., Threshold_1) corresponding to the insertion loss capability level.

[0084] In a possible implementation, the SRS insertion loss capability information may not include an insertion loss value, and one insertion loss capability level corresponds to one insertion loss threshold. After receiving the insertion loss capability level, the second node may determine the insertion loss threshold corresponding to the insertion loss capability level as the insertion loss value of the antenna port.

[0085] For example, Figure 5 FIG. 4 is a schematic diagram showing SRS insertion loss capability information. Figure 5 As shown, the transceiver unit of the first node has eight antenna ports #1, #2...#8, and the insertion loss capability levels of the eight antenna ports are different. The SRS insertion loss capability information may include the insertion loss capability level corresponding to each antenna port. For example:

[0086] When the insertion loss capability level of antenna port #1 is 1, the SRS insertion loss capability information includes the insertion loss capability level 1, the insertion loss value being the insertion loss threshold 0dB corresponding to the insertion loss capability level 1, and the antenna port index #1.

[0087] When the insertion loss capability level of antenna port #2 is 3, the SRS insertion loss capability information includes insertion loss capability level 3, an insertion loss value not exceeding the insertion loss threshold of 0.5dB corresponding to insertion loss capability level 2 (ie, the upper level corresponding to insertion loss capability level 3), and antenna port index #2.

[0088] When the insertion loss capability level of antenna port #3 is 2, the SRS insertion loss capability information includes insertion loss capability level 2, an insertion loss value not exceeding the insertion loss threshold 0dB corresponding to insertion loss capability level 1 (i.e., the upper level corresponding to insertion loss capability level 2) (i.e., the insertion loss value is 0dB), and antenna port index #2.

[0089] When the insertion loss capability level of antenna port #4 is 5, the SRS insertion loss capability information includes insertion loss capability level 5, an insertion loss value not exceeding the insertion loss threshold of 1.5dB corresponding to insertion loss capability level 4 (i.e., the upper level corresponding to insertion loss capability level 5), and antenna port index #4.

[0090] When the insertion loss capability level of antenna port #5 is 4, the SRS insertion loss capability information includes insertion loss capability level 4, an insertion loss value not exceeding the insertion loss threshold of 1.0dB corresponding to insertion loss capability level 3 (i.e., the upper level corresponding to insertion loss capability level 4), and antenna port index #5.

[0091] When the insertion loss capability level of antenna port #6 is 6, the SRS insertion loss capability information includes insertion loss capability level 6, an insertion loss value not exceeding the insertion loss threshold 2.0dB corresponding to insertion loss capability level 5 (ie, the upper level corresponding to insertion loss capability level 6), and antenna port index #6.

[0092] When the insertion loss capability level of antenna port #7 is 7, the SRS insertion loss capability information includes insertion loss capability level 7, an insertion loss value not exceeding the insertion loss threshold of 2.5dB corresponding to insertion loss capability level 6 (ie, the upper level corresponding to insertion loss capability level 7), and antenna port index #7.

[0093] When the insertion loss capability level of antenna port #8 is 8, the SRS insertion loss capability information includes insertion loss capability level 8, an insertion loss value not exceeding the insertion loss threshold 3dB corresponding to insertion loss capability level 7 (i.e., the upper level corresponding to insertion loss capability level 8), and antenna port index #8.

[0094] It should be understood that although the insertion loss values ​​reported by antenna ports #1 and #3 are the same, the reported insertion loss capability levels are different.

[0095] (6) Maximum SRS transmit power of M antenna ports

[0096] In a possible implementation, the first node may only report the SRS insertion loss capability information, so that the second node determines the SRS maximum transmit power based on the SRS insertion loss capability information. The first node may also determine the SRS maximum transmit power based on the SRS insertion loss capability information and report the power through the first information. The embodiment of the present disclosure is not limited to this. The process of determining the SRS maximum transmit power will be described below:

[0097] For the working frequency f of the working frequency band, the maximum SRS transmit power that can be configured when the UE sends SRS resources in each slot of the serving cell c is P CMAX,f,c , and satisfies P CMAX_L,f,c ≤P CMAX,f,c ≤P CMAX_H,f,c . This formula satisfies the following formula 1 and formula 2:

[0098] P CMAX_L,f,c =MIN{P EMAX,c –ΔT C,c ,(P PowerClass –ΔP PowerClass +ΔPPowerBoost )–

[0099] MAX(MAX(MPR c +ΔMPR c ,A-MPR c )+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPR c )}Formula 1;

[0100] P CMAX_H,f,c =MIN{P EMAX,c ,P PowerClass –ΔP PowerClass +ΔP PowerBoost} Formula 2;

[0101] Among them, P CMAX,f,c is the maximum transmission power of SRS, P CMAX_L,f,c is the lower limit of the range of the maximum SRS transmit power, P CMAX_H,f,c is the upper limit of the range of the maximum SRS transmit power, ΔT RxSRS is the predefined insertion loss difference, P PowerClass is the maximum transmit power level of the terminal. For example, for a UE with a maximum transmit power level of 3, P PowerClass =23dBm, for UE with maximum transmit power level 2, P PowerClass =26dBm, for UE with maximum transmit power level 1.5, P PowerClass

[0102] =29dBm, other parameters in Formula 1 and Formula 2 may refer to the definitions in the relevant art, and the embodiments of the present disclosure are not limited thereto.

[0103] It should be pointed out that for ΔT RxSRS Parameter, its value is related to SRS antenna switching capability indication, P PowerClass For example, when the SRS antenna switching capability is indicated as t2r4 or t1r4-t2r4, in each configured SRS resource set consisting of two antenna ports, when the first node sends SRS from the SRS port pair on the second SRS resource, when the uplink highest frequency point of the working frequency band is greater than 4400MHz, ΔT RxSRS =4.5dB.

[0104] The first node (or the second node) can replace ΔT in Formula 1 by the first insertion loss difference (ΔIL) RxSRS Parameters, due to ΔT RxSRSThe parameter is obtained based on a predefined insertion loss difference, which is often large, and the first insertion loss difference is determined based on the actual insertion loss value of the first node. The first insertion loss difference (ΔIL)

[0105] =max{X 1 ,X 2 ,...X i ,...X M}-min{X 1 ,X 2 ,...X i ,...X M}(dB), where Xi(i<=M) is the actual insertion loss value of the i-th antenna line port reported by the first node. Therefore, P is determined by the first insertion loss difference obtained based on the smaller actual insertion loss value. CMAX_L,f,c When P is determined CMAX_L,f,c In this way, the lower limit of the value range of the determined SRS maximum transmit power is smaller. In this way, the second node can configure a larger SRS transmit power when configuring the SRS transmit power for the first node, thereby improving the quality of the transmitted SRS and further improving the accuracy of the channel estimation.

[0106] In a possible implementation, if the first node does not have the capability to report SRS insertion loss information, then ΔT RxSRS The value of the parameter is the predefined insertion loss difference, then P CMAX_L,f,c =23dBm-4.5dB

[0107] =18.5dBm, P CMAX_L,f,c =23dBm, 18.5dBm≤P CMAX,f,c ≤23dBm.

[0108] For example, Table 2 shows another schematic table of SRS insertion loss capability levels. The antenna configuration of the first node is 2T8R, and the power level is 3 (i.e., the corresponding P PowerClass =23dBm), and the working frequency band is band n79. The first node supports selecting two antennas from among the eight antennas at a time to send the SRS pilot signal in turn.

[0109] The indexes of the eight antenna ports include #1, #2, ..., #8. As shown in Table 2, nine SRS insertion loss capability levels are defined.

[0110] Table 2

[0111] Insertion loss capability level Insertion loss threshold (dB) SRS IL 1 0 SRS IL≤0dB 2 0.5 SRS IL≤0.5dB 3 1 SRS IL≤1dB 4 1.5 SRS IL≤1.5dB 5 2 SRS IL≤2dB 6 2.5 SRS IL≤2.5dB 7 3 SRS IL≤3dB 8 4 SRS IL≤4dB 9 5 SRS IL≤5dB

[0112] For the SRS antenna switching capability indication of t2r8, the UE's P PowerClass The ΔT corresponding to 23dBmRxSRS =5.5dB. The maximum transmission power of the first node to send SRS is P CMAX,f,c , and satisfies P CMAX_L,f,c ≤P CMAX,f,c ≤P CMAX_H,f,c In addition, this formula satisfies the above formula 1 and formula 2. If P in the above formula 1 EMAX,c –ΔT C,c >(P PowerClass –ΔP PowerClass +ΔP PowerBoost )-MAX(MAX(MPR c +ΔMPR c ,A-MPR c )+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPR c ) in the parameter ΔP PowerClass , ΔP PowerBoost 、MPR c , ΔMPR c , ΔT IB,c , ΔT C,c 、P-MPR c are 0dBm, then P CMAX_L,f,c =P PowerClass -ΔT RxSRS ;P CMAX_H,f,c =P PowerClass .

[0113] If the first node has the capability to report SRS insertion loss information, then ΔT RxSRS The value of the parameter is replaced by the above ΔIL. Figure 5 As a result, ΔIL = 3dB, P CMAX_L,f,c =23dBm-3dB=20dBm,

[0114] P CMAX_L,f,c =23dBm, 20dBm≤P CMAX,f,c ≤23dBm. In this way, since the lower limit of the value range of the maximum transmission power of the SRS is increased, the first node can transmit the SRS according to a higher power.

[0115] Another example, Figure 6 Another schematic diagram of SRS insertion loss capability information is shown. Figure 6As shown, the transceiver unit of the first node has eight antenna ports #1, #2…#8. The SRS insertion loss capability information may include an insertion loss capability level 2 and at least one antenna port index, the corresponding insertion loss threshold is 0.5dB, and the insertion loss value is 0.5dB. In addition, it indicates that the insertion loss value of at least one antenna port is the same, both are 0.5dB, and the insertion loss values ​​of other unreported antenna ports are the same as the insertion loss values ​​of the antenna ports corresponding to at least one antenna port index. In this case, ΔIL is 0, and P CMAX_L,f,c =23dBm-0dB=23dBm, P CMAX_H,f,c =23dBm, 23dBm≤P CMAX,f,c ≤23dBm.

[0116] (7) SRS transmit power associated with M antenna ports

[0117] In a possible implementation, the first node may only report the SRS insertion loss capability information, so that the second node determines the SRS transmission power based on the SRS insertion loss capability information. The first node may also determine the SRS transmission power based on the SRS insertion loss capability information and report the power through the first information. The embodiment of the present disclosure is not limited to this. The process of determining the SRS transmission power will be described below:

[0118] In each activated uplink BWP and SRS resource set of the serving cell (serving cell c) within the working frequency f of the working frequency band, the UE uses the following formula 3 to determine the SRS transmission power P SRS,b,f,c (i,q s ,l):

[0119]

[0120] Among them, the above parameters can refer to the definitions of various parameters in related technologies, and the embodiments of the present disclosure will not be repeated here.

[0121] According to the above formula 3, the SRS transmission power P SRS,b,f,c (i,q s ,l) depends on {P cmax,f,c ,X}, for simplicity, where X is the minimum value of P O_SRS,b,f,c (q s )+10log 10 (2 μ )·M SRS,b,f,c (i))+α SRS,b,f,c (q s )·PL b,f,c (q d )+h b,f,cIn this way, when the maximum SRS transmission power (ie, Pcmax,f,c) increases, the determined SRS transmission power may also increase, thereby improving the transmission quality of the SRS and further improving the channel estimation accuracy.

[0122] For example, before the UE reports the SRS insertion loss capability information, 18.5dBm≤P CMAX,f,c ≤23dBm, then according to the above formula 3: After UE reports SRS insertion loss capability information, 23dBm≤P CMAX,f,c ≤23dBm (i.e. P CMAX,f,c =23dBm). As can be seen from the above, since the lower limit of the value range of the SRS maximum transmit power determined after reporting the SRS insertion loss capability information is increased, the determined SRS maximum transmit power is increased. When determining the SRS transmit power, the SRS can be transmitted according to a higher power, thereby improving the transmission quality of the SRS and further improving the channel estimation accuracy.

[0123] For example, Figure 7 A schematic diagram showing SRS insertion loss capability information Figure 3 .like Figure 7 As shown, the transceiver unit of the first node has eight antenna ports #1, #2...#8. The SRS insertion loss capability information may include the insertion loss capability level corresponding to each antenna port. The insertion loss values ​​of antenna port #1 and antenna port #5 are the same, and the insertion loss values ​​of the remaining six antenna ports are different.

[0124] For reporting the insertion loss values ​​of the remaining six antenna ports, the insertion loss value corresponding to each antenna port index can be reported, while for antenna port #1 and antenna port #5, only one SRS insertion loss capability level (or insertion loss value) needs to be reported, and there is no need to report the antenna port index.

[0125] When the first node determines the SRS transmission power according to the SRS insertion loss capability information, ΔIL=3dB, P CMAX_L,f,c =23dBm-3dB=20dBm, P CMAX_L,f,c =23dBm, 20dBm≤P CMAX,f,c ≤23dBm.

[0126] In some embodiments, the SRS transmit power includes the SRS transmit power of the target antenna port, and the SRS transmit power of the target antenna port is determined by the path loss information of the target antenna port, the SRS maximum transmit power and the second insertion loss difference, and the second insertion loss difference is the difference between the insertion loss value of the target antenna port and the smallest insertion loss value among the insertion loss values ​​of the M antenna ports.

[0127] The first information may include the SRS transmit power of each antenna port and / or the SRS maximum transmit power of each antenna port. SRS,b,f,c,p (i,q s ,l) can be obtained by the following formula 4:

[0128]

[0129] Formula 4;

[0130] Among them, P CMAX,f,c,p (i) is the maximum output power configured for each antenna port p of the terminal in the serving cell c of frequency band f in each SRS transmission occasion i;

[0131] PL b,f,c,p (q d ) is the activated downlink BWP of cell c of terminal frequency band f and the SRS resource set (q d ) The path loss information (i.e., the estimated downlink path loss) calculated by

[0132] If P o_SRS,b,f,c +10log 10 (2 u *M SRS,b,f,c (i))+a SRS,b,f,c (q s )*PL b,f,c,p (q d )+

[0133] h b,f,c (i,l)>P CMAX,f,c,p , then the first node according to the power P CMAX,f,c,p Transmit SRS. CMAX,f,c,p (i) Satisfy P CMAX_L,f,c,p ≤P CMAX,f,c,p (i)≤P CMAX_H,f,c,p .

[0134] Among them, P CMAX_L,f,c,p =MIN{P EMAX,c –ΔT C,c ,(P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPR c +ΔMPR c ,A-MPR c )+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPR c )};

[0135] P CMAX_H,f,c,p =MIN{P EMAX,c ,P PowerClass –ΔP PowerClass +ΔP PowerBoost};

[0136] P CMAX,f,c,p One value of (i) is P CMAX_L,f,c,p , if P EMAX,c –ΔT C,c >(P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPR c +ΔMPR c ,A-MPR c )+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPR c ) then P CMAX_L,f,c,p =(P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPR c +ΔMPR c ,A-MPR c )+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPR c ), and then P SRS,b,f,c,p (i,q,l)=(P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPR c +ΔMPR c ,A-MPR c )+ΔT IB,c +ΔT C,c +ΔT RxSRS ,P-MPR c ).

[0137] In another possible implementation, the SRS transmission power of each antenna port may be P SRS,b,f,c,,p (i,q,l)=(P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPR c +ΔMPR c ,A-MPR c )+ΔT IB,c +ΔT C,c+ΔT RxSRS ,P-MPR c ).

[0138] For example, the insertion loss value corresponding to each antenna port index in the eight antenna ports in the SRS insertion loss capability information is IL _ant_idx , at this time, ΔIL'=IL _ant_idx -min_IL (i.e., the second insertion loss difference mentioned above), where the subscript ant_idx represents the index of each antenna port, and min_IL is the index of all IL _ant_idx The minimum value among them. Then the SRS transmission power corresponding to the 8 antenna port indexes of the first node is (P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPR c +ΔMPR c ,A-MPR c )+ΔT IB,c +ΔT C,c +ΔIL',P-MPR c ) thereby informing the second node of the SRS transmission power of one or more antennas of the first node.

[0139] In another possible implementation, the first node may report insertion loss capability information of one or more antenna ports among all antenna ports, to indicate that the insertion loss value (or insertion loss capability information) in the insertion loss capability information needs to be considered when determining power for the reported one or more antenna ports.

[0140] For example, the first node has 8 antennas that can send SRS. The first node reports the insertion loss corresponding to 2 SRS antenna port indexes (index #1 and index #2), and the other 6 SRS antenna port indexes (antenna port index #3, index #4, index #5, index #6, index #7 and index #8) do not report insertion loss. The first node informs the second node that the transmission power of port index #1 and index #2 needs to take insertion loss into account. For other antenna port indexes, the first node prepares the SRS power of antenna port index #1 and index #2 according to the aforementioned formula 1.

[0141] (8) Path loss information related to M antenna ports

[0142] In a possible implementation, the path loss information may include the path loss of each antenna port, or the path loss difference of M antenna ports.

[0143] The above is a description of various parameters in the first information. Hereinafter, other interaction processes between the first node and the second node will be introduced with the second node as the main body.

[0144] The information transmission method provided by the embodiment of the present disclosure can be applied to Figure 2 A second node 202 in the communication system is shown. Figure 8 A schematic diagram showing a process of information transmission method Figure 2 ,like Figure 8 As shown, the information transmission method includes:

[0145] S801. Receive first information.

[0146] The first information is used to characterize the SRS sending capability of the first node.

[0147] In a possible implementation manner, the SRS transmission capabilities of multiple antenna ports of the first node may be different. Therefore, in order to report the SRS transmission capability of the antenna port of the first node,

[0148] The first node may send first information to the second node. It should be understood that the first information includes the SRS transmission capability of at least one antenna port among all antenna ports of the first node.

[0149] In this way, since the SRS sending capability is the actual capability of the first node, it is more accurate than the preset insertion loss difference. Therefore, the SRS power information configured for the first node through the SRS sending capability is more accurate, thereby improving the accuracy of SRS power control and the accuracy of channel estimation, thereby further improving the overall system performance.

[0150] In a possible implementation manner, after the second node receives the first information, the method further includes:

[0151] S802: Send second information, where the second information is used to indicate SRS power configuration information of the first node.

[0152] After receiving the first information sent by the first node, the second node can determine the SRS transmission capability of the first node. Since the SRS transmission capability is the real capability sent by the first node, the SRS power configuration information determined by the second node based on the SRS transmission capability is more accurate. Afterwards, the second node can send the second information to the first node to indicate the SRS power configuration information of the first node. In this way, the first node can configure the SRS transmission power based on the more accurate SRS power configuration information, so that the second node can control the SRS power more accurately, and further, the channel information estimated by the second node based on the SRS can be made more accurate, so as to improve the transmission performance of the communication system. Optionally, the power configuration information may include at least one of the following: SRS transmission power, transmission power spectrum density, equivalent isotropic radiated power (EPRE), energy per resource element (EIRP). In addition, the power configuration information can be associated with time unit, modulation waveform, modulation scheme, transmission mode, beam, etc.

[0153] It should be noted that, for the description of the first information, reference may be made to the above-mentioned description of the first node side, and the embodiments of the present disclosure will not be repeated here.

[0154] In one possible implementation, Fig. 9 As shown, the second node sends an inquiry request message to the first node, and the inquiry request message is used to inquire whether the first node has the ability to report SRS insertion loss capability information. Alternatively, the inquiry request message can inquire whether it has the ability to report the SRS insertion loss capability information of a certain (or certain) antenna port. In the case of determining that the first node does not have the ability to report the SRS insertion loss capability information, the second node can directly determine the SRS transmission power by presetting the insertion loss difference. In the case of determining that the first node has the ability to report the SRS insertion loss capability information, the second node can determine the SRS transmission power based on the reported SRS insertion loss capability information.

[0155] In some embodiments, when the SRS transmission power of the M antenna ports is greater than the first SRS transmission power, the second information is sent, and the first SRS transmission power is determined based on a preset insertion loss difference.

[0156] When the second node determines the SRS insertion loss capability information of one or more antenna ports reported by the first node, and calculates the SRS transmit power of the one or more antenna ports. Afterwards, the second node can compare the SRS transmit power of the one or more antenna ports with the SRS transmit power determined before the first node reports the SRS insertion loss capability information (i.e., the first SRS transmit power mentioned above). The second node can send second information (also referred to as power indication information) to the first node, thereby indicating that the SRS transmit power is the larger of the two powers mentioned above. Optionally, the second node can inform the first node of a capability, which indicates that the second node can configure the SRS transmit power for the SRS insertion loss capability information corresponding to one or more antenna ports according to the different SRS antenna switching capability indications of the first node.

[0157] Optionally, the second node may report the above-mentioned capability through at least one of the following signaling: radio resource control signaling (radio resource control, RRC), media access control control element (media access control control element, MAC CE) uplink control information (downlink control information, DCI) non-access stratum (non access stratum, NAS) signaling.

[0158] For example, after the first node reports different txry SRS antenna switching capability indications, there are y antenna port indexes, ΔT RxSRS is XdB. The first node is at ΔT RxSRS =XdB, the maximum transmit power that can be configured for the SRS antennas corresponding to all y antenna port indexes is calculated as YdBm according to the above formula 1 and formula 2. The second node stores the SRS transmit power of the first node and configures the SRS transmit power of the first node according to the second information.

[0159] When the first node has the capability to report SRS insertion loss information, the first node reports the SRS insertion loss capability information of one or more antenna port indexes to the second node. The second node receives the SRS insertion loss capability information of the M antenna ports reported by the first node and obtains the SRS IL value {X} of the one or more antenna port indexes of the first node. 1 ,X 2 ,...X i ,...X M}dBm, where X iThe values ​​of (i<=M) may be all different, partially the same, or all the same. After the second node obtains the SRS IL value of one or more antenna port indexes reported by the first node, it calculates ΔIL value=max{X 1 ,X 2 ,...X i ,...X M}-min{X 1 ,

[0160] X 2 ,...X i ,...X M}(dB). The second node recalculates the SRS transmission power NdBm of the first node according to the ΔIL value, and compares it with the maximum configurable transmission power YdBm of the SRS antenna, and the difference ΔP=NY(dB). If ΔP>0, the second node sends an SRS transmission power indication signaling to the first node, allowing the first node to send SRS with a higher power; or instructs the first node to adjust the maximum transmission power according to ΔP', where 0<ΔP'≤ΔP; if ΔP<=0, the second node may not send the SRS transmission power indication signaling to the first node. If the first node does not receive the SRS transmission power indication signaling sent by the second node, the first node can still configure its SRS maximum configurable transmission power according to the previously stored YdBm. It should be understood that when the first node only reports one SRS capability level, the first node only reports one SRS IL value XdBm. If the second node only receives one SRS insertion loss report from the first node, the second node considers that the SRS insertion loss values ​​of all antenna port indexes of the first node are the same, ΔIL=0dB.

[0161] In some embodiments, the first node may also determine the SRS transmit power difference of the M antenna ports based on the first information.

[0162] Exemplarily, the first node (or the second node) may determine the SRS transmission power of each antenna port according to the following formula.

[0163]

[0164] Then the SRS transmission power of the antenna port indexed as N_p0 among the M antenna ports is calculated according to the following formula: O_SRS,b,f,c (q s )+10log 10 (2 μ ·M SRS,b,f,c (i))+α SRS,b,f,c (q s )·PL b,f,c,p (q d )+hb,f,c (i,l); the remaining antenna ports are based on P CMAX,f,c,p (i) Calculate the transmit power. 0<=N_p0<=N_ant, where N_ant is the total number of antenna ports of the first node. When the second node receives the SRS insertion loss capability of the N_ant-N_p0 root antenna port index reported by the first node, the second node knows that the N_ant-N_p0 root antenna port index of the first node is calculated according to P CMAX_L,f,c,p Transmit SRS, where: P CMAX_L,f,c,p =MIN{P EMAX,c –ΔT C,c ,(P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPRc+ΔMPRc,A-MPRc)+ΔT IB,c +ΔT C,c +ΔIL,P-MPRc)}, if P EMAX,c –ΔT C,c >(P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPRc+ΔMPRc,A-MPRc)+ΔT IB,c +ΔT C,c +ΔT RxSRS,P -MPRc), then P CMAX_L,f,c =(P PowerClass –ΔP PowerClass +ΔP PowerBoost )–MAX(MAX(MPRc+ΔMPRc,A-MPRc)+ΔT IB,c +ΔT C,c +ΔIL,P-MPRc).

[0165] Where, ΔIL=IL _ant_idx -min_IL, where the subscript ant_idx represents the index of each antenna port, IL _ant_idx is the IL of each antenna index in the N_p0 antenna ports on the first node, and min_IL is the IL of all ILs _ant_idx Since the above SRS transmit power is determined based on the path loss information, when the SRS transmit power is obtained, the path loss information corresponding to the N_p0 antenna ports of the first node can be inferred.

[0166] In some further embodiments, a first SRS transmitted by M antenna ports is received, and a transmit power of the first SRS is determined; and the transmit power of the first SRS is adjusted based on path loss information of the M antenna ports.

[0167] In a possible implementation, the second node may determine the path loss difference of the M antenna ports of the first node, and further, the second node may determine the SRS transmission power or power difference of the M antenna ports based on the path loss difference. In this way, the second node can perform channel estimation compensation based on the power difference, thereby improving the accuracy of channel estimation. For example, the first node uses two antennas (#1 and #2) to send SRS to the second node, and the second node determines that the antenna port index #1 of the first node transmits SRS according to P_SRS, and antenna port #2 transmits SRS according to delta_P+P_SRS.

[0168] For example, Fig.10 A schematic diagram of transmitting SRS with different SRS transmission powers is shown. Assume that the SRS sent by the first node on the two antenna port indexes Tx#1 and Tx#2 are both X1, and the two antenna port indexes are sent in a frequency division or time division manner. The channel matrix between the second node and the first node is Where Hij represents the channel between receiving antenna i (Rx#i) and transmitting antenna j (Tx#j). If the channel matrix estimated by the second node based on the received signal is Where Hij' represents the channel between the receiving antenna i (Rx#i) and the transmitting antenna j (Tx#j) estimated by the second node. If the power difference of the power transmitting antenna is not considered, the channel estimated by the second node using the received signal is:

[0169] H11'=Y11 / X1

[0170] H12'=Y12 / X1

[0171] H21'=Y21 / X1

[0172] H22'=Y22 / X1

[0173] or

[0174] H11'=Y11 / (X1*P_SRS)

[0175] H12'=Y12 / (X1*P_SRS)

[0176] H21'=Y21 / (X1*P_SRS)

[0177] H22'=Y22 / (X1*P_SRS)

[0178] The actual channel estimation value should be

[0179] H11'=Y11 / (X1*P_SRS)

[0180] H12'=Y12 / (X1*(P_SRS*delta_P))

[0181] H21'=Y21 / (X1*P_SRS)

[0182] H22'=Y22 / (X1*(P_SRS*delta_P))

[0183] or

[0184] H11'=Y11 / (X1)

[0185] H12'=Y12 / (X1*delta_P)

[0186] H21'=Y21 / (X1)

[0187] H22'=Y22 / (X1*delta_P)

[0188] In this way, the second node can determine the power difference of the antenna port based on the path loss information, and further adjust the received SRS power. The channel determined by the adjusted SRS power is a more accurate channel, thereby improving the accuracy of channel estimation.

[0189] It should be noted that, for example, the above X1*P_SRS means that the first node sends the SRS signal X1 at a Tx#1 with power P_SRS, and X1*(P_SRS*delta_P) means that the first node sends the SRS signal X1 at a Tx#2 with power (P_SRS*delta_P). P_SRS*delta_P is a linear value representing the power considering the power difference between antennas. If the power difference between antennas is expressed in decibels, the multiplication symbol * in the above formula should be changed to the addition symbol +, which will not be repeated here. Considering the power difference, the above two channel estimation values ​​can obtain an estimation value closer to the real channel by compensating the channel estimation value.

[0190] Another example, Fig.11 FIG. 1 shows an interaction flow chart of a second node. Fig.11 As shown, it includes a first node, a second node and a third node. Among them, the third node is a node of the same type as the first node. The first node (or the third node) can send its SRS insertion loss capability information to the second node. The second node can send power indication information (i.e., the above-mentioned second information) to the first node (or the third node).

[0191] It is understandable that, in order to realize the above functions, the information transmission device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments of the present disclosure, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present disclosure.

[0192] The embodiments of the present disclosure may divide the information transmission device into functional modules according to the above method embodiments. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one functional module. The above integrated modules may be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0193] Fig.12 is a schematic diagram of the structure of a communication device provided by an embodiment of the present disclosure, and the communication device can execute the information transmission method provided by the above method embodiment. Fig.12 As shown, the communication device includes: a sending unit 1201.

[0194] The sending unit 1201 is used to send first information, where the first information is used to characterize the sounding reference signal SRS sending capability of the first node.

[0195] In one possible implementation, the first information includes at least one of the following: frequency domain resource information, antenna configuration information, SRS transmission power related to M antenna ports, SRS insertion loss capability information related to M antenna ports, path loss information related to M antenna ports, SRS resource set, configuration information of the SRS resource set, and SRS maximum transmission power of M antenna ports, where M is a positive integer.

[0196] In a possible implementation manner, the SRS insertion loss capability information includes at least one of the following: an insertion loss value, an insertion loss capability level, and an antenna port index.

[0197] In a possible implementation manner, an insertion loss capability level corresponds to an insertion loss threshold and an insertion loss value in the SRS insertion loss capability information.

[0198] In a possible implementation manner, the SRS insertion loss capability information includes an insertion loss capability level, and the insertion loss capability level is the insertion loss capability level of the M antenna ports.

[0199] In a possible implementation, when the number of insertion loss capability levels and antenna port indexes in the SRS insertion loss capability information is the same, the SRS insertion loss capability information includes M insertion loss capability levels and M antenna port indexes, and one antenna port index corresponds to one insertion loss capability level.

[0200] In a possible implementation, when the insertion loss capability levels and the number of antenna port indexes in the SRS insertion loss capability information are different, the SRS insertion loss capability information includes a first insertion loss capability level, N insertion loss capability levels, and N antenna port indexes; the N antenna ports indicated by the N antenna port indexes correspond to the N insertion loss capability levels; the first insertion loss capability level corresponds to other antenna ports among the M antenna ports except the N antenna ports, and N is a positive integer.

[0201] In a possible implementation, the SRS insertion loss capability information includes an insertion loss capability level n; n is a positive integer;

[0202] When n is greater than 1, the insertion loss value in the SRS insertion loss capability information corresponding to the insertion loss capability level n does not exceed the insertion loss threshold corresponding to the insertion loss capability level n-1;

[0203] When n is equal to 1, the insertion loss value in the insertion loss capability information corresponding to the insertion loss capability level n is the insertion loss threshold corresponding to the insertion loss capability level n.

[0204] In a possible implementation manner, the maximum SRS transmit power associated with the M antenna ports is determined by a first insertion loss difference;

[0205] The first insertion loss difference is the difference between the maximum insertion loss value and the minimum insertion loss value among the insertion loss values ​​of the M antenna ports.

[0206] In one possible implementation, the SRS transmit power includes the SRS transmit power of the target antenna port, and the SRS transmit power of the target antenna port is determined by the path loss information of the target antenna port, the SRS maximum transmit power and the second insertion loss difference, and the second insertion loss difference is the difference between the insertion loss value of the target antenna port and the smallest insertion loss value among the insertion loss values ​​of the M antenna ports.

[0207] In a possible implementation, the device further includes a receiving unit 1202; the receiving unit 1202 is configured to receive second information, where the second information is used to indicate SRS power configuration information of the first node.

[0208] Fig.13 is a schematic diagram of the structure of another communication device provided by an embodiment of the present disclosure, and the communication device can execute the information transmission method provided by the above method embodiment. Fig.13 As shown, the communication device includes: a receiving unit 1301.

[0209] The receiving unit 1301 is configured to receive first information, where the first information is used to characterize the SRS sending capability of the first node.

[0210] In one possible implementation, the first information includes at least one of the following: frequency domain resource information, antenna configuration information, SRS transmission power related to M antenna ports, SRS insertion loss capability information related to M antenna ports, path loss information related to M antenna ports, SRS resource set, configuration information of the SRS resource set, and SRS maximum transmission power of M antenna ports, where M is a positive integer.

[0211] In a possible implementation manner, the SRS insertion loss capability information includes at least one of the following: an insertion loss value, an insertion loss capability level, and an antenna port index.

[0212] In a possible implementation manner, an insertion loss capability level corresponds to an insertion loss threshold and an insertion loss value in the SRS insertion loss capability information.

[0213] In a possible implementation manner, the SRS insertion loss capability information includes an insertion loss capability level, and the insertion loss capability level is the insertion loss capability level of the M antenna ports.

[0214] In a possible implementation, when the number of insertion loss capability levels and antenna port indexes in the SRS insertion loss capability information is the same, the SRS insertion loss capability information includes M insertion loss capability levels, and one antenna port index corresponds to one insertion loss capability level.

[0215] In a possible implementation, when the insertion loss capability levels and the number of antenna port indexes in the SRS insertion loss capability information are different, the SRS insertion loss capability information includes a first insertion loss capability level, N insertion loss capability levels, and N antenna port indexes; the N antenna ports indicated by the N antenna port indexes correspond to the N insertion loss capability levels; the first insertion loss capability level corresponds to other antenna ports among the M antenna ports except the N antenna ports, and N is a positive integer.

[0216] In a possible implementation, the SRS insertion loss capability information includes an insertion loss capability level n; n is a positive integer; when n is greater than 1, the insertion loss value in the SRS insertion loss capability information corresponding to the insertion loss capability level n does not exceed the insertion loss threshold corresponding to the insertion loss capability level n-1; when n is equal to 1, the insertion loss value in the insertion loss capability information corresponding to the insertion loss capability level n is the insertion loss threshold corresponding to the insertion loss capability level n.

[0217] In a possible implementation, the maximum SRS transmission power associated with the M antenna ports is determined by a first insertion loss difference; wherein the first insertion loss difference is the difference between the maximum insertion loss value and the minimum insertion loss value among the insertion loss values ​​of the M antenna ports.

[0218] In one possible implementation, the SRS transmit power includes the SRS transmit power of the target antenna port, and the SRS transmit power of the target antenna port is determined by the path loss information of the target antenna port, the SRS maximum transmit power and the second insertion loss difference, and the second insertion loss difference is the difference between the insertion loss value of the target antenna port and the smallest insertion loss value among the insertion loss values ​​of the M antenna ports.

[0219] In a possible implementation, the device further includes: a sending unit 1302;

[0220] The sending unit 1302 is configured to send second information when the SRS transmit power of the M antenna ports is greater than a first SRS transmit power, where the first SRS transmit power is determined based on a preset insertion loss difference.

[0221] In a possible implementation, the sending unit 1302 is configured to send an inquiry request message to the first node, where the inquiry request message is used to inquire whether the first node has the ability to report SRS insertion loss capability information.

[0222] In a possible implementation, the device further includes an adjusting unit 1303; the receiving unit 1301 is further configured to receive a first SRS sent by the M antenna ports and determine a transmit power of the first SRS.

[0223] The adjusting unit 1303 is configured to adjust the transmit power of the first SRS based on the path loss information of the M antenna ports.

[0224] In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, the embodiments of the present disclosure provide another possible structure of the communication device involved in the above-mentioned embodiments. Fig.14As shown, the communication device 140 includes: a processor 1402 and a bus 1404. Optionally, the communication device may further include a memory 1401; optionally, the communication device may further include a communication interface 1403.

[0225] The processor 1402 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 1402 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present disclosure. The processor 1402 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0226] The communication interface 1403 is used to connect with other devices via a communication network, such as Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0227] The memory 1401 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0228] As a possible implementation, the memory 1401 may exist independently of the processor 1402, and the memory 1401 may be connected to the processor 1402 via a bus 1404 to store instructions or program codes. When the processor 1402 calls and executes the instructions or program codes stored in the memory 1401, the information transmission method provided in the embodiment of the present disclosure can be implemented.

[0229] In another possible implementation, the memory 1401 may also be integrated with the processor 1402 .

[0230] The bus 1404 may be an extended industry standard architecture (EISA) bus, etc. The bus 1404 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.14 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0231] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a computer, the computer executes the information transmission method described in any of the above embodiments.

[0232] Exemplarily, the above-mentioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (e.g., compact disks (CD), digital versatile disks (DVD), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0233] An embodiment of the present disclosure provides a computer program product including instructions. When the computer program product is run on a computer, the computer is enabled to execute the information transmission method described in any one of the above embodiments.

[0234] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An information transmission method, characterized in that: Applied to the first node, the method comprises: Sending first information, where the first information is used to characterize a sounding reference signal (SRS) sending capability of the first node.

2. The method according to claim 1, characterized in that: The first information includes at least one of the following: frequency domain resource information, antenna configuration information, SRS transmission power related to M antenna ports, SRS insertion loss capability information related to M antenna ports, path loss information related to M antenna ports, SRS resource set, configuration information of the SRS resource set, and SRS maximum transmission power of M antenna ports, where M is a positive integer.

3. The method according to claim 2, characterized in that The SRS insertion loss capability information includes at least one of the following: an insertion loss value, an insertion loss capability level, and an antenna port index.

4. The method according to claim 3, characterized in that: An insertion loss capability level corresponds to an insertion loss threshold and an insertion loss value in the SRS insertion loss capability information.

5. The method according to claim 3, characterized in that: The SRS insertion loss capability information includes an insertion loss capability level, and the insertion loss capability level is the insertion loss capability level of the M antenna ports.

6. The method according to claim 3, characterized in that In the case where the number of insertion loss capability levels and antenna port indexes in the SRS insertion loss capability information is the same, the SRS insertion loss capability information includes M insertion loss capability levels and M antenna port indexes, and one antenna port index corresponds to one insertion loss capability level.

7. The method according to claim 3, characterized in that In a case where the number of insertion loss capability levels and antenna port indexes in the SRS insertion loss capability information is different, the SRS insertion loss capability information includes a first insertion loss capability level, N insertion loss capability levels, and N antenna port indexes; the N antenna ports indicated by the N antenna port indexes correspond to the N insertion loss capability levels; The first insertion loss capability level corresponds to other antenna ports among the M antenna ports except the N antenna ports, where N is a positive integer.

8. The method according to claim 3, characterized in that The SRS insertion loss capability information includes an insertion loss capability level n; n is a positive integer; When n is greater than 1, the insertion loss value in the SRS insertion loss capability information corresponding to the insertion loss capability level n does not exceed the insertion loss threshold corresponding to the insertion loss capability level n-1; When n is equal to 1, the insertion loss value in the insertion loss capability information corresponding to the insertion loss capability level n is the insertion loss threshold corresponding to the insertion loss capability level n.

9. The method according to claim 2, characterized in that: The maximum SRS transmission power associated with the M antenna ports is determined by a first insertion loss difference; wherein the first insertion loss difference is the difference between the maximum insertion loss value and the minimum insertion loss value among the insertion loss values ​​of the M antenna ports.

10. The method according to claim 2, characterized in that The SRS transmit power includes the SRS transmit power of the target antenna port, and the SRS transmit power of the target antenna port is determined by the path loss information of the target antenna port, the SRS maximum transmit power, and the second insertion loss difference, and the second insertion loss difference is the difference between the insertion loss value of the target antenna port and the smallest insertion loss value among the insertion loss values ​​of the M antenna ports.

11. The method according to claim 1, characterized in that: The method further comprises: Second information is received, where the second information is used to indicate SRS power configuration information of the first node.

12. An information transmission method, characterized in that: Applied to the second node, the method comprises: First information is received, where the first information is used to characterize an SRS sending capability of a first node.

13. The method according to claim 12, characterized in that The first information includes at least one of the following: frequency domain resource information, antenna configuration information, SRS transmission power related to M antenna ports, SRS insertion loss capability information related to M antenna ports, path loss information related to M antenna ports, SRS resource set, configuration information of the SRS resource set, and SRS maximum transmission power of M antenna ports, where M is a positive integer.

14. The method according to claim 13, characterized in that The SRS insertion loss capability information includes at least one of the following: an insertion loss value, an insertion loss capability level, and an antenna port index.

15. The method according to claim 14, characterized in that: An insertion loss capability level corresponds to an insertion loss threshold and an insertion loss value in the SRS insertion loss capability information.

16. The method according to claim 14, characterized in that The SRS insertion loss capability information includes an insertion loss capability level, and the insertion loss capability level is the insertion loss capability level of the M antenna ports.

17. The method according to claim 14, characterized in that In a case where the number of insertion loss capability levels and antenna port indexes in the SRS insertion loss capability information is the same, the SRS insertion loss capability information includes M insertion loss capability levels, and one antenna port index corresponds to one insertion loss capability level.

18. The method according to claim 14, characterized in that In a case where the number of insertion loss capability levels and antenna port indexes in the SRS insertion loss capability information is different, the SRS insertion loss capability information includes a first insertion loss capability level, N insertion loss capability levels, and N antenna port indexes; the N antenna ports indicated by the N antenna port indexes correspond to the N insertion loss capability levels; The first insertion loss capability level corresponds to other antenna ports among the M antenna ports except the N antenna ports, where N is a positive integer.

19. The method according to claim 14, characterized in that The SRS insertion loss capability information includes an insertion loss capability level n; n is a positive integer; When n is greater than 1, the insertion loss value in the SRS insertion loss capability information corresponding to the insertion loss capability level n does not exceed the insertion loss threshold corresponding to the insertion loss capability level n-1; When n is equal to 1, the insertion loss value in the insertion loss capability information corresponding to the insertion loss capability level n is the insertion loss threshold corresponding to the insertion loss capability level n.

20. The method according to claim 13, characterized in that The maximum SRS transmission power associated with the M antenna ports is determined by a first insertion loss difference; wherein the first insertion loss difference is the difference between the maximum insertion loss value and the minimum insertion loss value among the insertion loss values ​​of the M antenna ports.

21. The method according to claim 13, characterized in that The SRS transmit power includes the SRS transmit power of the target antenna port, and the SRS transmit power of the target antenna port is determined by the path loss information of the target antenna port, the SRS maximum transmit power, and the second insertion loss difference, and the second insertion loss difference is the difference between the insertion loss value of the target antenna port and the smallest insertion loss value among the insertion loss values ​​of the M antenna ports.

22. The method according to claim 12, characterized in that The method further comprises: In a case where the SRS transmission power of the M antenna ports is greater than the first SRS transmission power, the second information is sent, where the first SRS transmission power is determined based on a preset insertion loss difference.

23. The method according to claim 12, characterized in that The method further comprises: receiving a first SRS sent by the M antenna ports, and determining a transmit power of the first SRS; The transmit power of the first SRS is adjusted based on the path loss information of the M antenna ports.

24. The method according to claim 12, characterized in that The method further comprises: An inquiry request message is sent to the first node, where the inquiry request message is used to inquire whether the first node has the ability to report SRS insertion loss capability information.

25. A communication device, characterized in that: include: Memory and processor; Memory and processor coupling; The memory is used to store instructions executable by the processor; When the processor executes the instructions, the method according to any one of claims 1 to 24 is performed.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 24.

27. A computer program product, characterized in that The computer program product comprises computer program instructions, which implement the method according to any one of claims 1 to 24 when executed by a processor.

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