Information transmission method, communication apparatus, storage medium and program product

Abstract

Provided are an information transmission method, a communication apparatus, a storage medium and a program product. The method comprises: sending first information, wherein the first information is used for representing a sounding reference signal (SRS) transmission capability of a first node.

Description

Information transmission method, communication apparatus, storage medium and program product

[0001] The present disclosure claims priority to Chinese Patent Application No. 202411092969.6, filed on August 08, 2024, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the field of communication technology, and particularly relates to an information transmission method, a communication apparatus, a storage medium and a program product. BACKGROUND

[0003] In a wireless communication network, a terminal can transmit a sounding reference signal (SRS) to a base station through a SRS transmission power configured by the base station, so that the base station performs channel estimation and the like. SUMMARY

[0004] Embodiments of the present disclosure provide an information transmission method, a communication apparatus, a storage medium and a program product.

[0005] In one aspect, an information transmission method is provided, comprising: sending first information, the first information being used to represent a sounding reference signal (SRS) transmission capability of the first node.

[0006] In another aspect, an information transmission method is provided, comprising: receiving first information, the first information being used to represent a SRS transmission capability of the first node.

[0007] In yet another aspect, an information transmission apparatus is provided, comprising: a sending unit; the sending unit is configured to send first information, the first information being used to represent a sounding reference signal (SRS) transmission capability of the first node.

[0008] In yet another aspect, an information transmission apparatus is provided, comprising: a receiving unit; the receiving unit is configured to receive first information, the first information being used to represent a SRS transmission capability of the first node.

[0009] In yet another aspect, a communication node is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is configured to store a computer program; and the processor is configured to execute the computer program to implement the information transmission method of any of the above embodiments.

[0010] In yet another aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores computer program instructions, the computer program instructions being executed by a processor to implement the information transmission method of any of the above embodiments.

[0011] In another aspect, the embodiments of the present disclosure provide a computer program product, which comprises computer program instructions, and the computer program instructions, when executed by a processor, implement the information transmission method described in any of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings needed to be used in some embodiments of the present disclosure. Obviously, the drawings described in the following are only some of the drawings of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0013] FIG. 1 is a schematic diagram of an antenna wheel according to some embodiments of the present disclosure.

[0014] FIG. 2 is a communication system architecture diagram according to some embodiments of the present disclosure.

[0015] FIG. 3 is a flowchart of an information transmission method according to some embodiments of the present disclosure.

[0016] FIG. 4 is a structural diagram of an antenna configuration according to some embodiments of the present disclosure.

[0017] FIG. 5 is a schematic diagram of SRS insertion capability information according to some embodiments of the present disclosure.

[0018] FIG. 6 is a schematic diagram of another SRS insertion capability information according to some embodiments of the present disclosure.

[0019] FIG. 7 is a schematic diagram of still another SRS insertion capability information according to some embodiments of the present disclosure.

[0020] FIG. 8 is a flowchart of another information transmission method according to some embodiments of the present disclosure.

[0021] FIG. 9 is a flowchart of an inquiry request information according to some embodiments of the present disclosure.

[0022] FIG. 10 is a schematic diagram of transmitting SRS with different SRS transmission power according to some embodiments of the present disclosure.

[0023] FIG. 11 is an interaction flowchart of a second node according to some embodiments of the present disclosure.

[0024] FIG. 12 is a block diagram of a communication device according to some embodiments of the present disclosure.

[0025] FIG. 13 is a block diagram of another communication device according to some embodiments of the present disclosure.

[0026] FIG. 14 is a block diagram of still another communication device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0027] The technical solutions in the present disclosure will be described clearly and completely below in combination with the drawings in the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present disclosure.

[0028] It should be noted that in the present disclosure, the words such as “exemplarily” or “for example” are used to mean as an example, illustration or description. Any embodiment or design scheme described as “exemplarily” or “for example” in the present disclosure should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the words such as “exemplarily” or “for example” are intended to present the related concept in an exemplary manner.

[0029] Hereinafter, the terms “first”, “second”, and the like are only used for description purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second”, and the like can 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 the present disclosure is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can mean three cases: only A, only B, and A and B. In addition, “at least one” means one or more, and “multiple” means two or more.

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

[0032] Currently, a terminal generally supports 1 / 2 / 4 antenna transmission or 2 / 4 / 6 / 8 antenna reception. The terminal can send SRS on the transmit antenna and the receive antenna alternately. For example, for a terminal of 2Tx8Rx (i.e., two transmit antennas and eight receive antennas), the terminal supports sending SRS in the eight receive antennas alternately, and each time two antennas are selected to send SRS. However, because the radio frequency front end design of different antennas can be different, and the radio frequency front end design and the frequency band are related, the insertion loss (IL) experienced by the terminal when sending SRS on different antenna ports is inconsistent.

[0033] When sending SRS, the terminal can send SRS to the base station through the SRS transmission power configured by the base station, so that the base station performs channel estimation. However, when determining the SRS transmission power, the base station is determined through a preset insertion loss difference value (i.e., ΔT RxSRS ). Because this value is an insertion loss difference value, and is often a poor value, that is, the insertion loss difference value is usually a large value, this will cause the maximum transmission power of the configurable SRS to be small. However, in actual scenarios, factors such as loss compensation made by the terminal itself or changes on the radio frequency link can cause the SRS insertion loss difference value to be better than the above-mentioned index value (i.e., the preset insertion loss difference value), that is, smaller than the above-mentioned index value, so that the configurable SRS transmission power of the terminal is larger than the maximum SRS transmission power determined by the base station based on the index value. Therefore, when the base station determines the SRS transmission power based on the above-mentioned index value, it will cause inaccurate control of the SRS transmission power, thereby causing inaccurate channel estimation of the receiver and incorrect precoding matrix indicator (PMI) selection, and reducing the overall performance of the system.

[0034] To this end, the embodiments of the present disclosure provide an information transmission method. A first node can send first information for characterizing the SRS sending capability of the first node. Because the SRS sending capability is the actual SRS sending capability reported by the first node, a second node can more accurately configure SRS power information for the first node according to the SRS sending capability. In this way, the second node can more accurately control the SRS power, thereby improving the channel estimation accuracy and the like, and improving the overall performance of the communication system.

[0035] The information transmission method provided in the embodiments of the present disclosure can be applied to systems of various communication modes. For example, the information transmission method provided in the embodiments of the present disclosure can be applied to communication systems such as a long term evolution (LTE) system, various versions based on LTE evolution, a 5th generation mobile communication technology (5G) system, and the like. In addition, the information transmission method provided in the embodiments of the present disclosure can also be applied to future-oriented communication systems and the like.

[0036] In some embodiments, the information transmission method described above can be applied to a communication system as shown in FIG. 2. As shown in FIG. 2, the communication system includes a first node 201 and a second node 202.

[0037] In some embodiments, the first node 201 and the second node 202 are communicatively connected. The first node 201 can be at least one of a terminal, a user equipment (UE), a relay node (Relay) that assumes a relay function, a transmitting point, an Internet of Things device, and various transmitting devices. The second node 202 can be at least one of a base station (BS), a relay node (Relay) that assumes a relay function, and various receiving devices such as a receiving point. FIG. 2 illustrates an example in which the first node 201 is a terminal and the second node 202 is a base station.

[0038] In the embodiments of the present disclosure, the first node 201 can send first information for indicating SRS transmission capability to the second node 202. The second node 202 can receive the first information sent by the first node 201, and send second information for indicating SRS power configuration information of the first node 201 to the first node 201 based on the first information. In this way, since the SRS transmission capability is the actual SRS transmission capability reported by the first node 201, the power configuration information determined by the second node 202 based on the transmission capability is more accurate, so that the SRS power information of the first node 201 can be configured 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 FIG. 2 is only an exemplary framework diagram, and the number of devices included in FIG. 2 and the names of various devices are not limited, and in addition to the devices shown in FIG. 2, the communication system can also include other devices such as a relay node.

[0040] The application scenarios are not limited in the embodiments of the present disclosure. The system architecture and business scenarios described in the embodiments of the present disclosure are used 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. Those skilled in the art can know that, with the evolution of network architecture and the appearance 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 embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0042] The information transmission method provided by the embodiments of the present disclosure can be applied to the first node 201 in the communication system shown in FIG. 2. FIG. 3 shows a flowchart of an information transmission method. As shown in FIG. 3, the information transmission method comprises S301.

[0043] In S301, the first information is transmitted.

[0044] Here, the first information is used to represent the SRS transmission capability of the first node.

[0045] In some embodiments, the SRS transmission capabilities of the multiple antenna ports of the first node can be different. Therefore, in order to report the SRS transmission capabilities of the antenna ports of the first node, the first node can transmit the first information to the second node. It should be understood that the first information includes the SRS transmission capability of at least one of all the antenna ports of the first node.

[0046] In this way, since the SRS transmission capability is the actual capability of the first node, it is more accurate than the preset insertion loss difference value, and therefore the SRS power information configured for the first node based on the SRS transmission capability is more accurate, thereby improving the accuracy of SRS power control and improving the accuracy of channel estimation, and further improving the overall system performance.

[0047] In some embodiments, after the first node transmits the first information, the first node can receive the second information. Here, the second information is used to indicate the SRS power configuration information of the first node.

[0048] The second node can determine the SRS transmission capability of the first node after receiving the first information sent by the first node. Since the SRS transmission capability is the actual capability of the first node, the SRS power configuration information determined by the second node based on the SRS transmission capability is more accurate. Then, 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 transmit power based on the more accurate SRS power configuration information, so that the second node can control the SRS transmit power more accurately, and further, the second node can estimate the channel information based on the SRS more accurately, so as to improve the transmission performance of the communication system.

[0049] In some embodiments, 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 capability information related to M antenna ports, path loss information related to M antenna ports, an SRS resource set, configuration information of the SRS resource set, or SRS maximum transmit power of M antenna ports, where M is a positive integer. Here, the M antenna ports are at least one of all antenna ports of the first node. In the following, various information included in the first information will be described respectively.

[0050] (1) Frequency domain resource information

[0051] The frequency domain resource information can include the frequency domain resource required to send the SRS, or at least one frequency domain resource (such as frequency band, etc.) in which an antenna port operates. The frequency domain resource information can be a defined frequency band in the wireless spectrum, such as the operating frequency band in Frequency Range 1 (FR1) (its range is 410 megahertz (MHz) - 7125 MHz), the operating frequency band in Frequency Range 2 (FR2) (its range is 24250 MHz - 52600 MHz), and other frequency bands defined for these frequency ranges and other frequency ranges (such as above 52600 MHz). The frequency band can also be a K band, an S band, an ultra high frequency (UHF), an extremely high frequency (EHF), etc.

[0052] The frequency domain resource information can be a certain bandwidth component carrier within a frequency band, for example, the commonly used bandwidths are 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 aggregated bandwidth.

[0053] The frequency domain resource information can also be a bandwidth part (BWP), which is a spectrum resource block in the total available bandwidth within the carrier.

[0054] (2) Antenna configuration information

[0055] 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, denoted as xTyR (x and y are both positive integers, and x is less than or equal to y), which means x transmit antennas and y receive antennas. For example, for a 5G terminal (such as a mobile phone, customer premises equipment (CPE), or fixed wireless access (FWA) device), the commonly supported antenna configuration information includes 1T2R, 1T4R, 1T8R, 2T2R, 2T4R, 2T8R, 4T4R, 4T8R, and other antenna configuration information introduced later.

[0056] In some embodiments, FIG. 4 shows a structural diagram of an antenna configuration. As shown in FIG. 4, in the antenna configuration information xTyR of the transceiver unit of the terminal, x antennas are used for transmission or reception, and (y-x) antennas are only used for reception. The antenna port index of the transmit antenna includes #1, #2…#x; the antenna port index of the receive antenna includes #x+1…#y-1, #y.

[0057] It should be noted that the transceiver supports the transmission and reception of a single component carrier or multiple component carriers of one frequency band, and also supports the transmission and reception of multiple component carriers of multiple frequency bands. Generally, the transceiver includes a baseband processing module, an intermediate frequency processing module, a radio frequency processing module (including a radio frequency front-end power amplifier, a duplex filter, etc.) and auxiliary circuits thereof, etc. Here, the radio frequency processing module includes radio frequency filters, radio frequency duplexers, radio frequency amplifiers, radio frequency low-noise amplifiers, and other radio frequency devices. The transceiver can also include an antenna selection module, including some commonly used multiplexing switch devices such as single-pole double-throw (SPDT), double-pole double-throw (DPDT), etc.

[0058] (3) SRS resource set

[0059] In a 5G new radio (NR) system, the second node can indicate one or more SRS resource sets to the first node through a high layer radio resource control (RRC) parameter, 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 is configured in the last six orthogonal frequency division multiplexing (OFDM) symbols of a slot in the time domain, which can be 1, 2 or 4 consecutive symbols; the SRS resource supports multiple SRS bandwidth configurations in the frequency domain, the range of which is 4-272 resource blocks (RBs), and the value is an integer multiple of 4.

[0060] (4) Configuration information of SRS resource set

[0061] The configuration information of the SRS resource set can include the usage of the SRS resource set, for example, the usage of antenna switching, and can also include the use case of the SRS resource set, for example, the use case of the antenna switching of the SRS resource set. The use case of the SRS resource set is configured by a high-level parameter. At present, the use case of the SRS resource set can include beam management, codebook, non-codebook, and antenna switching. When the high-level parameter configures the usage as antennaSwitching, and the first node supports the SRS antenna switching capability, the first node can 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 can be the value of txry or tarb-tcrd-..-txry, or can be indicated in the form of bitmaps.

[0062] 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 subsequent introduced SRS antenna switching capability indication txry, 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 subsequent introduced SRS antenna switching capability indication, such as t1r1-t2r2, t1r1-t1r2-t1r4, t1r1-t1r2-t2r2-t2r4, t1r1-t1r2-t2r2-t1r4-t2r4, etc.

[0063] In some embodiments, the high-level parameter configures the use case of the SRS resource set as antennaSwitching, and the reporting manner of the SRS antenna switching capability of the first node includes:

[0064] If the capability indication is t1r8 or a capability indication containing t1r8 (such as t1r8-t2r8), the first node will send SRS in all configured SRS resource sets (each resource set containing one SRS) from a total of 8 transceiver antennas, selecting one antenna to send at a time, i.e. selecting one antenna from the first #1, #2, #3, #4, #5, #6, #7 and #8 antennas to send SRS in turn.

[0065] If the capability indication is t2r8 or a capability indication containing t2r8 (such as t1r8-t2r8), the first node will send SRS in all configured SRS resource sets (each resource set containing two SRS) from a total of 8 transceiver antennas, selecting two antennas to send at a time, i.e. selecting two antennas from the first #1, #2, #3, #4, #5, #6, #7 and #8 antennas to send SRS in turn, such as selecting {#1, #2}, {#3, #4}, {#5, #6}, {#7, #8} to send SRS in turn, where {#m, #n} is the antenna port index corresponding to each resource set containing two SRS.

[0066] (5) SRS insertion loss capability information

[0067] It should be understood that the SRS insertion loss is generally caused by the path loss experienced by the SRS signal from the radio frequency front-end power amplifier or the radio frequency low noise amplifier to the antenna. The path loss is the sum of all insertion losses including filters, wiring losses, line losses, multi-path switch internal insertion losses, etc.

[0068] 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 or an antenna port index. Here, the SRS insertion loss capability level is used to represent the size of the insertion loss value, and one insertion loss capability level can correspond to one insertion loss threshold and one insertion loss value in the SRS insertion loss capability information.

[0069] In this case, the second node does not need to determine the SRS maximum transmission power by the preset insertion loss difference value when configuring the SRS transmission power, but can determine the SRS maximum transmission power by the insertion loss difference value determined by the actual insertion loss values of all the antenna port indexes reported by the first node. Since the insertion loss difference value determined by the actual insertion loss values of all the antenna port indexes reported by the first node is smaller than the preset insertion loss difference value, the SRS maximum transmission power determined by the second node based on the smaller insertion loss difference value will be larger. In this way, the first node can transmit SRS by a larger power, thereby improving the transmission quality of SRS.

[0070] In some embodiments, Table 1 is a schematic table of an insertion loss capability level.

[0071] Table 1

[0072] Here, the insertion capability level (may also be referred to as the SRS insertion capability level) includes 1, 2…n, each insertion capability level corresponds to an insertion loss threshold value, for example, the insertion capability level 2 corresponds to the insertion loss threshold value Threshold_2, the insertion loss threshold value is the maximum SRS IL under this level, and the threshold value increases with the increase of the insertion capability level. For example, the reported insertion loss value (SRS IL) corresponding to the insertion capability level 2 is less than or equal to Threshold_2.

[0073] The antenna port index is used to associate at least one of the insertion loss value or the insertion capability level, since the insertion 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 capability information, one antenna port index can correspond to at least one of one or more insertion loss values, or one or more insertion loss threshold values. For example, the SRS insertion capability information can be {SRS antenna m, SRS IL class n}, where antenna is used to represent the antenna port index, SRS IL class is used to represent the insertion capability level, m=0, 1, 2, 3…y, n=1, 2,…N, y≥2, N>1. In some embodiments, the antenna port index is a way to distinguish the antenna ports of the first node, and the embodiments of the present disclosure do not limit other ways to distinguish the antenna ports, for example, the antenna ports can be distinguished by resources or resource sets.

[0074] The SRS insertion capability information can report the insertion loss values of the M antenna ports in multiple ways, for example, in the SRS insertion capability information, the number of antenna port indexes and insertion capability levels (or insertion loss values) can be the same or different. The following will describe multiple ways of reporting the SRS insertion capability information of 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.

[0075] In some embodiments, the insertion capability levels (or insertion loss values) corresponding to the M antenna port indexes can be the same or different, and the embodiments of the present disclosure do not limit this.

[0076] Method 1: The SRS insertion capability information includes one insertion capability level (or one insertion loss value). This one insertion capability level (or insertion loss value) is the insertion capability level (or insertion loss value) of the M antenna ports, that is, the insertion capability levels (or insertion loss values) of the M antenna ports are the same, at this time, in the SRS insertion capability information, only one insertion capability level (or one insertion loss value) can be reported without reporting the antenna port index, thereby saving the field and saving the transmission resource.

[0077] In the case that the number of the capability levels (or the number of the insertion loss values) and the number of the antenna port indexes are the same in the SRS insertion capability information, the SRS insertion capability information includes M capability levels, and one antenna port index corresponds to (or is applied to) one capability level (or one insertion loss value). That is, the SRS insertion capability information includes M antenna port indexes and M capability levels. In this way, one antenna port index can correspond to one capability level, and the first node can report the capability level of each antenna port in the M antenna ports, so that the SRS insertion capability of each antenna port can be reported more clearly.

[0078] In the case that the number of the capability levels (or the number of the insertion loss values) and the number of the antenna port indexes are different in the SRS insertion capability information, the SRS insertion capability information includes a first capability level, N capability levels and N antenna port indexes. Here, the number of the first capability level is 1, the N antenna ports indicated by the N antenna port indexes respectively correspond to the N capability levels, the first capability level corresponds to the other antenna ports in the M antenna ports except the N antenna ports, N is a positive integer, and is not greater than M (for example, less than or equal to M). In this way, in the case that the capability levels (or the insertion loss values) of M-N antenna ports in the M antenna ports are the same, and the capability levels of the remaining N antenna ports are all different from the capability levels of the M-N antenna ports, the capability level corresponding to each antenna port index can be reported for the N antenna port indexes, so that resources can be saved, and transmission resources can be saved.

[0079] However, for the above-mentioned M-N antenna ports, since the capability levels of these antenna port indexes are the same, only one capability level can be reported, and the M-N antenna port indexes do not need to be reported. After receiving the SRS insertion capability information, the second node determines that there is no antenna port index corresponding to the first capability level, and determines that the first capability level is the capability level common to the M-N antenna port indexes.

[0080] In some embodiments, the SRS insertion capability information includes a capability level n; n is a positive integer; in the case that n is greater than 1, the insertion loss value corresponding to the capability level n in the SRS insertion capability information does not exceed (for example, is less than or equal to) the insertion loss threshold value corresponding to the capability level n-1; in the case that n is equal to 1, the insertion loss value corresponding to the capability level n in the SRS insertion capability information is the insertion loss threshold value corresponding to the capability level n.

[0081] When the reported SRS insertion capability level is n (corresponding to the insertion loss threshold value Threshold_N), then the reported insertion loss value in the SRS insertion capability information corresponding to the insertion capability level n is no more than (e.g., less than or equal to) the insertion loss threshold value (Threshold_N-1) corresponding to the next lower insertion capability level (i.e., n-1). In some embodiments, when the insertion capability level is the lowest level (e.g., level 1, corresponding to the insertion loss threshold value Threshold_1), then the reported insertion loss value corresponding to the insertion capability level is the insertion loss threshold value (i.e., Threshold_1) corresponding to the insertion capability level.

[0082] In some embodiments, the SRS insertion capability information can not include the insertion loss value, and one insertion loss threshold value corresponds to one insertion capability level. Upon receiving the insertion capability level, the second node can determine the insertion loss threshold value corresponding to the insertion capability level as the insertion loss value of the antenna port.

[0083] In some embodiments, FIG. 5 illustrates a diagram of SRS insertion capability information. As shown in FIG. 5, the transceiver of the first node has eight antenna ports #1, #2, …, #8, and the insertion capability levels of the eight antenna ports are all different. The SRS insertion capability information can include the insertion capability level corresponding to each antenna port. For example:

[0084] When the insertion capability level of the antenna port #1 is 1, then the SRS insertion capability information includes the insertion capability level 1, the insertion loss value which is the insertion loss threshold value 0 dB corresponding to the insertion capability level 1, and the antenna port index #1.

[0085] When the insertion capability level of the antenna port #2 is 3, then the SRS insertion capability information includes the insertion capability level 3, the insertion loss value which is no more than (e.g., less than or equal to) the insertion loss threshold value 0.5 dB corresponding to the insertion capability level 2 (i.e., the upper level corresponding to the insertion capability level 3), and the antenna port index #2.

[0086] When the insertion capability level of the antenna port #3 is 2, then the SRS insertion capability information includes the insertion capability level 2, the insertion loss value which is no more than (e.g., less than or equal to) the insertion loss threshold value 0 dB corresponding to the insertion capability level 1 (i.e., the upper level corresponding to the insertion capability level 2), and the antenna port index #3.

[0087] When the insertion capability level of the antenna port #4 is 5, then the SRS insertion capability information includes the insertion capability level 5, the insertion loss value which is no more than (e.g., less than or equal to) the insertion loss threshold value 1.5 dB corresponding to the insertion capability level 4 (i.e., the upper level corresponding to the insertion capability level 5), and the antenna port index #4.

[0088] When the insertion capability level of the antenna port #5 is 4, the SRS insertion capability information includes the insertion capability level 4, an insertion loss value not exceeding (e.g., less than or equal to) the insertion loss threshold 1.0 dB corresponding to the insertion capability level 3 (i.e., the upper level corresponding to the insertion capability level 4), and the antenna port index #5.

[0089] When the insertion capability level of the antenna port #6 is 6, the SRS insertion capability information includes the insertion capability level 6, an insertion loss value not exceeding (e.g., less than or equal to) the insertion loss threshold 2.0 dB corresponding to the insertion capability level 5 (i.e., the upper level corresponding to the insertion capability level 6), and the antenna port index #6.

[0090] When the insertion capability level of the antenna port #7 is 7, the SRS insertion capability information includes the insertion capability level 7, an insertion loss value not exceeding (e.g., less than or equal to) the insertion loss threshold 2.5 dB corresponding to the insertion capability level 6 (i.e., the upper level corresponding to the insertion capability level 7), and the antenna port index #7.

[0091] When the insertion capability level of the antenna port #8 is 8, the SRS insertion capability information includes the insertion capability level 8, an insertion loss value not exceeding (e.g., less than or equal to) the insertion loss threshold 3 dB corresponding to the insertion capability level 7 (i.e., the upper level corresponding to the insertion capability level 8), and the antenna port index #8.

[0092] It should be understood that, although the insertion loss values reported by the antenna ports #1 and #3 are the same, the reported insertion capability levels are different.

[0093] (6) SRS maximum transmission power of M antenna ports

[0094] In some embodiments, the first node can only report the SRS insertion capability information, so that the second node determines the SRS maximum transmission power based on the SRS insertion capability information, and the first node can also determine the SRS maximum transmission power based on the SRS insertion capability information and report the power through the first information, which is not limited in the embodiments of the present disclosure. In the following, the process of determining the SRS maximum transmission power will be described:

[0095] For the operating frequency f of the operating frequency band, the SRS maximum transmission power configurable by the UE when sending the SRS resource on each slot of the serving cell c (serving cell c) is P CMAX,f,c , and satisfies P CMAX_L,f,c ≤ P CMAX,f,c ≤ P CMAX_H,f,c . The formula satisfies the following formula 1 and formula 2: P CMAX_L,f,c = MIN{P EMAX,c – ΔT C,c , (P PowerClass – ΔP PowerClass + ΔPPowerBoost ) - MAX(MAX(MPR c + ΔMPR c , A-MPR c ) + ΔT IB,c + ΔT C,c + ΔT RxSRS , P-MPR c )} (1) P CMAX_H,f,c = MIN{P EMAX,c , P PowerClass - ΔP PowerClass + ΔP PowerBoost} (2);

[0096] Here, P CMAX,f,c is the maximum transmit power of SRS, P CMAX_L,f,c is the lower limit value of the value range of the maximum transmit power of SRS, P CMAX_H,f,c is the upper limit value of the value range of the maximum transmit power of SRS, ΔT RxSRS is a preset insertion loss difference value, P PowerClass is the maximum transmit power level of the terminal, such as P PowerClass = 23 dBm for a UE of maximum transmit power level 3, P PowerClass = 26 dBm for a UE of maximum transmit power level 2, P PowerClass = 29 dBm for a UE of maximum transmit power level 1.5, and other parameters in formula 1 and formula 2 can be referred to the definition in related technologies, which are not limited by the embodiments of the present disclosure.

[0097] It should be noted that for the ΔT RxSRS parameter, its value is related to the SRS antenna switching capability indication, P PowerClass , and the working frequency band. For example, when the SRS antenna switching capability indication is configured as t2r4 or t1r4-t2r4, in each configured SRS resource set composed of two antenna ports, the first node transmits SRS from the SRS port pair on the second SRS resource, and for the highest uplink frequency point of the working frequency band greater than 4400 MHz, ΔT RxSRS = 4.5 dB.

[0098] The first node (or the second node) can replace the ΔT RxSRS parameter in formula 1 with the first insertion loss difference (ΔIL), and ΔT RxSRSThe parameter is based on a preset IL difference value, which is often large, and the first IL difference value is determined based on the actual IL value of the first node. The first IL difference value (ΔIL) = max{X1, X2,... X i ,...X M}-min{X1, X2,... X i ,...X M}(dB), where Xi (i≤M) is the actual IL value of the i-th antenna port index reported by the first node. Therefore, when P CMAX_L,f,c is determined based on the first IL difference value obtained based on the smaller actual IL value, the determined P CMAX_L,f,c is smaller. In this way, the lower limit value of the range of the determined SRS maximum transmission power is smaller. In this way, the second node can configure a larger SRS transmission power when configuring the SRS transmission power for the first node, so as to improve the quality of the transmitted SRS and further improve the accuracy of channel estimation.

[0099] In some embodiments, if the first node does not have the ability to report SRS insertion information, the value of ΔT RxSRS is the preset IL difference value, then P CMAX_L,f,c = 23dBm-4.5dB = 18.5dBm, P CMAX_H,f,c = 23dBm, and P CMAX,f,c satisfies: 18.5dBm≤P CMAX,f,c ≤23dBm.

[0100] In some embodiments, Table 2 shows another exemplary table of SRS insertion capability levels. The first node has an antenna configuration of 2T8R, a maximum transmission power level of 3 (i.e., corresponding to P PowerClass = 23dBm), and a working frequency band of band n79. The first node supports selecting two antennas at a time to send SRS pilot signals alternately on 8 antennas. The indexes of the eight antenna ports include #1, #2,..., #8. As shown in Table 2, nine SRS insertion capability levels are defined.

[0101] Table 2

[0102] For the SRS antenna switching capability indication of t2r8, the P PowerClass of the UE is 23dBm, and the corresponding ΔT RxSRS = 5.5dB. The maximum transmission power of the first node for sending SRS is P CMAX,f,c , and satisfies P CMAX_L,f,c ≤P CMAX,f,c ≤P CMAX_H,f,c . In addition, the formula satisfies the above formula 1 and formula 2. If P EMAX,c- AT C,c > (P PowerClass - AP PowerClass + AP PowerBoost ) - MAX(MAX(MPR c + AMPR c , A-MPR c ) + AT IB,c + AT C,c + AT RxSRS , P-MPR c ), and the parameters AP PowerClass , AP PowerBoost , MPR c , AMPR c , AT IB,c , AT C,c , P-MPR c in Equation 1 are all 0 dBm, then P CMAX_L,f,c = P PowerClass - AT RxSRS ; P CMAX_H,f,c = P PowerClass .

[0103] If the first node has the capability information of reporting SRS insertion, the value of AT RxSRS is replaced by the above-mentioned ΔIL. As shown in FIG. 5, ΔIL = 3 dB, P CMAX_L,f,c = 23 dBm - 3 dB = 20 dBm, P CMAX_H,f,c = 23 dBm, 20 dBm ≤ P CMAX,f,c ≤ 23 dBm. Thus, since the lower limit of the range of the maximum SRS transmission power is increased, the first node can transmit SRS according to higher power.

[0104] In other embodiments, FIG. 6 shows another diagram of SRS insertion capability information. As shown in FIG. 6, the transceiver unit of the first node has eight antenna ports #1, #2, …, #8. The SRS insertion capability information can include one insertion capability level 2 and at least one antenna port index, and the corresponding insertion loss threshold is 0.5 dB, and the insertion loss value is 0.5 dB. Moreover, the insertion loss values of the at least one antenna port are the same, all being 0.5 dB, and the insertion loss values of the other unreported antenna ports are the same as the insertion loss values of the at least one antenna port index corresponding antenna port, at this time, ΔIL is 0, P CMAX_L,f,c = 23 dBm - 0 dB = 23 dBm, P CMAX_H,f,c = 23 dBm, 23 dBm ≤ P CMAX,f,c ≤ 23 dBm.

[0105] (7) SRS transmission power related to M antenna ports

[0106] In some embodiments, the first node can only report the SRS insertion capability information, so that the second node determines the SRS transmission power based on the SRS insertion capability information, and the first node can also determine the SRS transmission power based on the SRS insertion capability information and report the power through the first information, which is not limited in the embodiments of the present disclosure. In the following, the process of determining the SRS transmission power will be described.

[0107] In each activated uplink BWP of the serving cell (serving cell c) within the operating frequency f of the operating frequency band and in the SRS resource set, the UE determines the transmission power P of the SRS by using the following formula 3 SRS,b,f,c (i,q s ,l):

[0108] Wherein, each parameter can refer to the definition of each parameter in the related art, and the embodiments of the present disclosure will not be repeated here.

[0109] According to the above formula 3, it can be known that the SRS transmission power P SRS,b,f,c (i,q s ,l) depends on the minimum value of {P CMAX,f,c ,X}, where, in order to facilitate understanding, X is 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,c (i,l). In this way, when the SRS maximum transmission power (i.e. P CMAX,f,c ) increases, the determined SRS transmission power can also increase, so that the transmission quality of the SRS can be improved, and the channel estimation accuracy is further improved.

[0110] For example, before the UE reports the SRS insertion capability information, 18.5dBm≤P CMAX,f,c ≤23dBm, then according to the above formula 3, it can be obtained that: After the UE reports the SRS insertion capability information, 23dBm≤P CMAX,f,c ≤23dBm (i.e. P CMAX,f,c =23dBm). As can be known from the above, since the lower limit value of the value range of the determined SRS maximum transmission power after reporting the SRS insertion capability information is improved, the determined SRS maximum transmission power is improved, and when determining the SRS transmission power, the SRS can be transmitted according to the higher power, so that the transmission quality of the SRS is improved, and the channel estimation accuracy is further improved.

[0111] In some embodiments, FIG. 7 shows another schematic diagram of SRS insertion capability information. As shown in FIG. 7, the transceiver of the first node has eight antenna ports #1, #2, …, #8. The SRS insertion capability information can include an insertion capability level corresponding to each antenna port. The insertion loss values of the antenna port #1 and the antenna port #5 are the same, and the insertion loss values of the remaining six antenna ports are not the same.

[0112] For the reporting of the insertion loss values of the remaining six antenna ports, the insertion loss value corresponding to each antenna port index can be reported, and for the antenna port #1 and the antenna port #5, only one SRS insertion capability level (or insertion loss value) needs to be reported, without the need to report the antenna port index.

[0113] When the first node determines the SRS transmission power according to the SRS insertion capability information, ΔIL=3dB, P CMAX_L,f,c =23dBm-3dB=20dBm, P CMAX_H,f,c =23dBm, 20dBm≤P CMAX,f,c ≤23dBm.

[0114] In some embodiments, the SRS transmission power includes an SRS transmission power of a target antenna port, the SRS transmission power of the target antenna port being determined by a path loss information of the target antenna port, an SRS maximum transmission power, and a second insertion loss difference value, the second insertion loss difference value being a difference between an insertion loss value of the target antenna port and a minimum insertion loss value among insertion loss values of the M antenna ports.

[0115] The first information can include at least one of an SRS transmission power of each antenna port or an SRS maximum transmission power of each antenna port. The SRS transmission power of each antenna port P SRS,b,f,c,p (i,q s ,l) can be obtained by the following formula 4:

[0116] wherein P CMAX,f,c,p (i) is a maximum output power configured by the terminal for each antenna port p of the serving cell c of the frequency band f at each SRS transmission occasion i; PL b,f,c,p (q d ) is path loss information (i.e., downlink path loss estimation value) (in decibels dB) calculated by the terminal for the active downlink BWP of the cell c of the frequency band f and the SRS resource set (q d ).

[0117] If P o_SRS,b,f,c +10log 10 (2 u ×M SRS,b,f,c(i) ) + a SRS,b,f,c (q s ) x PL b,f,c,p (q d ) + h b,f,c (i, l) > P CMAX,f,c,p , the first node transmits SRS with power P CMAX,f,c,p (i). P CMAX,f,c,p (i) satisfies P CMAX_L,f,c,p ≤ P CMAX,f,c,p (i) ≤ P CMAX_H,f,c,p .

[0118] where 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 )}; P CMAX_H,f,c,p = MIN{P EMAX,c , P PowerClass - ΔP PowerClass + ΔP PowerBoost};

[0119] One value of P CMAX,f,c,p (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-MPRc ), 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 ).

[0120] In some embodiments, the SRS transmission power of each antenna port can 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 ).

[0121] In some embodiments, the insertion loss value corresponding to each antenna port index in the SRS insertion capability information of the eight antenna ports is IL _ant_idx , and then ΔIL' = IL _ant_idx - min_IL (i.e., the second insertion loss difference value described above), where the subscript ant_idx represents the port index of each antenna, and min_IL is the minimum value of all IL _ant_idx . The SRS transmission power of the eight 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.

[0122] In yet some embodiments, the first node can report the insertion capability information of one or more antenna ports in all antenna ports, for indicating that the insertion loss value (or the insertion capability information) in the reported insertion capability information needs to be considered when determining the power.

[0123] For example, the first node has 8 antennas to send SRS. The first node reports the insertion loss corresponding to 2 SRS antenna port indexes (antenna port index #1 and index #2), and does not report the insertion loss of other 6 SRS antenna port indexes (antenna port index #3, index #4, index #5, index #6, index #7 and index #8). The first node informs the second node that the transmission power of antenna port indexes #1 and #2 needs to consider the insertion loss. For other antenna port indexes, the first node prepares the SRS power of antenna port indexes #1 and #2 according to the aforementioned formula 1.

[0124] (8) M antenna port related loss information

[0125] In some embodiments, the loss information can include the loss of each antenna port, or the loss difference value of the M antenna ports.

[0126] The above is the description of the plurality of parameters in the first information. In the following, the other interaction processes of the first node and the second node will be introduced taking the second node as the main body.

[0127] The information transmission method provided by the embodiments of the present disclosure can be applied to the second node 202 in the communication system shown in FIG. 2. FIG. 8 shows a flowchart of another information transmission method. As shown in FIG. 8, the information transmission method includes S801.

[0128] In S801, the first information is received.

[0129] Here, the first information is used to represent the SRS sending capability of the first node.

[0130] In some embodiments, the SRS sending capability of the plurality of antenna ports of the first node can be different. Therefore, in order to report the SRS sending capability of the antenna port of the first node, the first node can send the first information to the second node. It should be understood that the first information includes the SRS sending capability of at least one antenna port of all antenna ports of the first node.

[0131] 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 value, and therefore the SRS power information configured for the first node by the SRS sending capability is more accurate, thereby improving the accuracy of SRS power control and improving the accuracy of channel estimation, and further improving the overall system performance.

[0132] In some embodiments, after the second node receives the first information, S802 is further included.

[0133] In S802, the second information is sent.

[0134] Here, the second information is used to indicate the SRS power configuration information of the first node.

[0135] 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 actual capability of the first node, the SRS power configuration information determined by the second node based on the SRS transmission capability is more accurate. Then, 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 transmission power more accurately, and further, the second node can estimate the channel information based on the SRS more accurately, so as to improve the transmission performance of the communication system.

[0136] In some embodiments, the power configuration information can include at least one of the following: SRS transmission power, transmission power spectral density, effective isotropic radiated power (EIRP), or energy per resource element (EPRE). In addition, the power configuration information can be associated with a time unit, a modulation waveform, a modulation scheme, a transmission mode, a beam, etc.

[0137] It should be noted that the description of the first information can refer to the description of the first node side described above, and the embodiments of the present disclosure will not be repeated here.

[0138] In some embodiments, as shown in FIG. 9, the second node sends a query request information to the first node, and the query request information is used to query whether the first node has the capability to report the SRS insertion capability information. Alternatively, the query request information is used to query whether the capability to report the SRS insertion capability information of a certain antenna port (or certain antenna ports) is possessed. In the case of determining that the first node does not have the capability to report the SRS insertion capability information, the second node can directly determine the SRS transmission power through the preset insertion loss difference value. In the case of determining that the first node has the capability to report the SRS insertion capability information, the second node can determine based on the reported SRS insertion capability information when determining the SRS transmission power.

[0139] In some embodiments, the second node sends the second information in the case that the SRS transmission power of the M antenna ports is greater than the first SRS transmission power. Here, the first SRS transmission power is determined based on the preset insertion loss difference value.

[0140] The second node determines the SRS insertion capability information of the one or more antenna ports reported by the first node, and calculates the SRS transmission power of the one or more antenna ports. Then, the second node can compare the SRS transmission power of the one or more antenna ports with the SRS transmission power determined before the first node reports the SRS insertion capability information (i.e., the first SRS transmission power described above). The second node can send second information (which can also be referred to as power indication information) to the first node, thereby indicating the larger power of the above two powers as the SRS transmission power. In some embodiments, the second node can inform the first node of a capability, which indicates that the second node can configure the SRS transmission power for the SRS insertion capability information corresponding to the one or more antenna ports under different SRS antenna switching capability indications of the first node.

[0141] In some embodiments, the second node can report the above capability through at least one of the following signaling: radio resource control (RRC) signaling, media access control-control element (MAC CE), downlink control information (DCI), or non-access stratum (NAS) signaling.

[0142] In some embodiments, after the first node reports the SRS antenna switching capability indication of different txry, there are y antenna port indexes, ΔT RxSRS = X dB. The first node calculates the maximum configurable transmission power of the SRS antenna corresponding to the y antenna port indexes according to the above formula 1 and formula 2 respectively as Y dBm in the case of ΔT RxSRS = X dB. The first node calculates the maximum configurable transmission power of the SRS antenna corresponding to the y antenna port indexes according to the above formula 1 and formula 2 respectively as Y dBm in the case of ΔT

[0143] In the case that the first node has the capability to report the SRS insertion capability information, the first node reports the SRS insertion capability information of one or more antenna port indexes to the second node, and the second node obtains the SRS IL values {X1, X2,...X i ,...X M} dBm of the one or more antenna port indexes of the first node after receiving the reported M antenna port SRS insertion capability information of the first node. Here, X iThe values of the SRS ILs of the one or more antenna port indexes reported by the first node can be all different, some of them can be the same, or all of them can be the same. After the second node obtains the SRS ILs of the one or more antenna port indexes reported by the first node, the second node calculates a value of ΔIL = max{X1, X2,...X i ,...X M} - min{X1, X2,...X i ,...X M} (dB). The second node recalculates the SRS transmission power N dBm of the first node according to the value of ΔIL, and compares N dBm with the maximum configurable SRS transmission power Y dBm of the first node, and the difference ΔP = N - Y (dB). If ΔP > 0, the second node sends SRS transmission power indication signaling to the first node, allowing the first node to transmit SRS at a greater power; or instructing the first node to adjust the maximum transmission power by ΔP', where 0 < ΔP' ≤ ΔP; if ΔP ≤ 0, the second node can not send SRS transmission power indication signaling to the first node, and if the first node does not receive the SRS transmission power indication signaling sent by the second node, the first node can still configure the maximum configurable SRS transmission power of the first node as Y dBm. It should be understood that when the first node only reports one SRS capability level, the first node only reports one SRS IL value X dBm, and if the second node only receives one SRS IL value X dBm reported by the first node, the second node considers that the SRS IL values of all antenna port indexes of the first node are the same, i.e., ΔIL = 0 dB.

[0144] In some embodiments, the first node can further determine the SRS transmission power difference values of the M antenna ports based on the first information.

[0145] In some embodiments, the first node (or the second node) can determine the SRS transmission power of each antenna port according to the following formula.

[0146] The SRS transmission power of the antenna port with the index N_p0 in the M antenna ports is calculated according to the following formula: P OSRS,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 )+h b,f,c (i,l); and the SRS transmission power of the remaining antenna ports is calculated according to P CMAX,f,c,p(i) calculating 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 puncturing capability of N_ant-N_p0 antenna port indexes reported by the first node, the second node knows that the N_ant-N_p0 antenna port indexes of the first node are according to P CMAX_L,f,c,p transmitting 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).

[0147] Here, ΔIL = IL _ant_idx - min_IL, 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 of the first node, and min_IL is the minimum value of all IL _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 deduced.

[0148] In some other embodiments, a first SRS transmitted by M antenna ports is received, and a first SRS transmit power is determined; the first SRS transmit power is adjusted based on path loss information of the M antenna ports.

[0149] In some embodiments, the second node can determine the path loss difference of the M antenna ports of the first node, and further, the second node can determine the SRS transmit power or power difference of the M antenna ports based on the path loss difference. In this way, the second node can compensate the channel estimation based on the power difference, thereby improving the accuracy of the channel estimation. For example, the first node transmits SRS to the second node with two antennas (#1 and #2), the second node determines that the antenna port index #1 of the first node transmits SRS with P_SRS, and the antenna port #2 transmits SRS with ΔP+P_SRS.

[0150] In some embodiments, FIG. 10 shows a schematic diagram of transmitting SRS with different SRS transmit power. Assume that the SRS transmitted by the first node at two antenna port indexes Tx#1 and Tx#2 are both X1, and the two antenna port indexes are transmitted in a frequency-division or time-division manner. The channel matrix between the second node and the first node is Here, Hij represents the channel between the receiving antenna i (Rx#i) and the transmitting antenna j (Tx#j). If the channel matrix estimated by the second node based on the received signal is Here, 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: H11’=Y11 / X1; H12’=Y12 / X1; H21’=Y21 / X1; H22’=Y22 / X1;

[0151] Or, H11’=Y11 / (X1×P_SRS); H12’=Y12 / (X1×P_SRS); H21’=Y21 / (X1×P_SRS); H22’=Y22 / (X1×P_SRS);

[0152] And the actual channel estimation value should be: H11’=Y11 / (X1×P_SRS); H12’=Y12 / (X1×(P_SRS×ΔP)); H21’=Y21 / (X1×P_SRS); H22’=Y22 / (X1×(P_SRS×ΔP));

[0153] Or, H11’=Y11 / (X1); H12’=Y12 / (X1×ΔP); H21’=Y21 / (X1); H22’=Y22 / (X1×ΔP).

[0154] In this way, the second node can determine the power difference of the antenna ports 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 the channel estimation.

[0155] It should be noted that, for example, the above X1*P_SRS indicates that the first node transmits the SRS signal X1 at a power P_SRS on Tx#1, and X1*(P_SRS*AP) indicates that the first node transmits the SRS signal X1 at a power (P_SRS*AP) on Tx#2. Here, P_SRS*AP is a linear value representing the power considering the inter-antenna power difference. If the inter-antenna power difference is represented by a decibel value, the multiplication symbol * in the above formula should be modified to the addition symbol +, which will not be described here. Considering the power difference, the above two channel estimation values can be compensated by the channel estimation value to obtain an estimation value closer to the actual channel.

[0156] In some other embodiments, FIG. 11 shows an interaction flowchart of a second node. As shown in FIG. 11, the first node, the second node and the third node are included. Here, 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 capability information to the second node. The second node can send the power indication information (i.e., the above second information) to the first node (or the third node).

[0157] It can be understood that, to implement the above functions, the information transmission device includes at least one of the hardware structure or the software module corresponding to 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 realized in the form of hardware or the combination of hardware and computer software. Whether a certain function is realized in the form of hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present disclosure.

[0158] The embodiments of the present disclosure can divide the function modules of the information transmission device according to the above method embodiments, for example, each function module can be divided according to each function, or two or more functions can be integrated in one function module. The above integrated module can be realized in the form of hardware or software. It should be noted that the division of the modules in the embodiments of the present disclosure is illustrative, and is only a logical function division. When actually implemented, another division method can be used. The following will be described taking the example of dividing each function module according to each function.

[0159] FIG. 12 is a block diagram of a communication device according to some embodiments of the present disclosure. The communication device can perform the information transmission method provided by the above method embodiments. As shown in FIG. 12, the communication device includes a sending unit 1201.

[0160] The sending unit 1201 is configured to send first information, wherein the first information is used to represent a sounding reference signal (SRS) transmission capability of the first node.

[0161] In some embodiments, the first information comprises at least one of the following: frequency domain resource information, antenna configuration information, SRS transmission power related to M antenna ports, SRS insertion capability information related to M antenna ports, path loss information related to M antenna ports, an SRS resource set, configuration information of the SRS resource set, or SRS maximum transmission power of M antenna ports, where M is a positive integer.

[0162] In some embodiments, the SRS insertion capability information comprises at least one of the following: an insertion loss value, an insertion capability level, or an antenna port index.

[0163] In some embodiments, one insertion capability level corresponds to one insertion loss threshold value and one insertion loss value in the SRS insertion capability information.

[0164] In some embodiments, the SRS insertion capability information comprises one insertion capability level, and the insertion capability level is an insertion capability level of the M antenna ports.

[0165] In some embodiments, when the number of insertion capability levels and the number of antenna port indexes in the SRS insertion capability information are the same, the SRS insertion capability information comprises M insertion capability levels and M antenna port indexes, one antenna port index corresponding to one insertion capability level.

[0166] In some embodiments, when the number of insertion capability levels and the number of antenna port indexes in the SRS insertion capability information are different, the SRS insertion capability information comprises a first insertion capability level, N insertion capability levels, and N antenna port indexes; the N antenna ports indicated by the N antenna port indexes correspond to the N insertion capability levels respectively; the first insertion capability level corresponds to other antenna ports in the M antenna ports except the N antenna ports, and N is a positive integer.

[0167] In some embodiments, the SRS insertion capability information comprises an insertion capability level n; n is a positive integer;

[0168] When n is greater than 1, the insertion loss value corresponding to the insertion capability level n in the SRS insertion capability information is less than or equal to (for example, less than or equal to) the insertion loss threshold value corresponding to the insertion capability level n-1;

[0169] When n is equal to 1, the insertion loss value corresponding to the insertion capability level n in the SRS insertion capability information is the insertion loss threshold value corresponding to the insertion capability level n.

[0170] In some embodiments, the SRS maximum transmission power related to the M antenna ports is determined by a first insertion loss difference value.

[0171] Here, the first insertion loss difference value is a difference value between a maximum insertion loss value and a minimum insertion loss value among the insertion loss values of the M antenna ports.

[0172] In some embodiments, the SRS transmission power includes an SRS transmission power of a target antenna port, and the SRS transmission power of the target antenna port is determined by path loss information of the target antenna port, the SRS maximum transmission power, and a second insertion loss difference value, the second insertion loss difference value being a difference value between an insertion loss value of the target antenna port and a minimum insertion loss value among the insertion loss values of the M antenna ports.

[0173] In some embodiments, the communication apparatus further includes a receiving unit 1202 configured to receive second information, the second information being used to indicate SRS power configuration information of the first node.

[0174] FIG. 13 is a block diagram of another communication apparatus according to some embodiments of the present disclosure, which can perform the information transmission method provided by the above-mentioned method embodiments. As shown in FIG. 13, the communication apparatus includes a receiving unit 1301.

[0175] The receiving unit 1301 is configured to receive first information, the first information being used to represent SRS sending capability of a first node.

[0176] In some embodiments, 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 capability information related to M antenna ports, path loss information related to M antenna ports, an SRS resource set, configuration information of the SRS resource set, or SRS maximum transmission power of M antenna ports, where M is a positive integer.

[0177] In some embodiments, the SRS insertion capability information includes at least one of the following: an insertion loss value, an insertion capability level, or an antenna port index.

[0178] In some embodiments, one insertion capability level corresponds to one insertion loss threshold value and one insertion loss value in the SRS insertion capability information.

[0179] In some embodiments, the SRS insertion capability information includes one insertion capability level, and the insertion capability level is an insertion capability level of the M antenna ports.

[0180] In some embodiments, in the case that the number of the capability levels and the number of the antenna port indexes are the same in the SRS insertion capability information, the SRS insertion capability information comprises M capability levels, one antenna port index corresponding to one capability level.

[0181] In some embodiments, in the case that the number of the capability levels and the number of the antenna port indexes are not the same in the SRS insertion capability information, the SRS insertion capability information comprises a first capability level, N capability levels and N antenna port indexes; the N antenna port indexes indicate N antenna ports corresponding to the N capability levels respectively; the first capability level corresponds to the antenna ports other than the N antenna ports in the M antenna ports, N being a positive integer.

[0182] In some embodiments, the SRS insertion capability information comprises a capability level n; n being a positive integer; in the case that n is greater than 1, the insertion loss value corresponding to the capability level n in the SRS insertion capability information is no more than (e.g. less than or equal to) the insertion loss threshold value corresponding to the capability level n-1; in the case that n is equal to 1, the insertion loss value corresponding to the capability level n in the SRS insertion capability information is the insertion loss threshold value corresponding to the capability level n.

[0183] In some embodiments, the maximum SRS transmission power related to the M antenna ports is determined by a first insertion loss difference value; here, the first insertion loss difference value is the difference between the maximum insertion loss value and the minimum insertion loss value in the insertion loss values of the M antenna ports.

[0184] In some embodiments, the SRS transmission power comprises the SRS transmission power of a target antenna port, the SRS transmission power of the target antenna port being determined by the path loss information of the target antenna port, the maximum SRS transmission power and a second insertion loss difference value, the second insertion loss difference value being the difference between the insertion loss value of the target antenna port and the minimum insertion loss value in the insertion loss values of the M antenna ports.

[0185] In some embodiments, the communication device further comprises: a sending unit 1302.

[0186] The sending unit 1302 is configured to send second information in the case that the SRS transmission power of the M antenna ports is greater than a first SRS transmission power, the first SRS transmission power being determined based on a preset insertion loss difference value.

[0187] In some embodiments, the sending unit 1302 is configured to send an inquiry request message to the first node, the inquiry request message being used to inquire whether the first node has the capability of reporting SRS insertion capability information.

[0188] In some embodiments, the communication apparatus further comprises an adjusting unit 1303.

[0189] The receiving unit 1301 is further configured to receive a first SRS transmitted by the M antenna ports, and determine a first SRS transmission power.

[0190] The adjusting unit 1303 is configured to adjust the first SRS transmission power based on the path loss information of the M antenna ports.

[0191] In the case of implementing the functions of the above integrated modules in the form of hardware, the embodiments of the present disclosure provide another possible structure of the communication apparatus involved in the above embodiments. As shown in FIG. 14, the communication apparatus 140 includes a processor 1402 and a bus 1404. In some embodiments, the communication apparatus can further include a memory 1401; in some embodiments, the communication apparatus can further include a communication interface 1403.

[0192] The processor 1402 can be various exemplary logical blocks, modules and circuits described in combination with the embodiments of the present disclosure. The processor 1402 can 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 device, transistor logic device, hardware component or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in combination with the embodiments of the present disclosure. The processor 1402 can also be a combination of computing functions, such as one or more microprocessor combinations, combinations of DSP and microprocessor, etc.

[0193] The communication interface 1403 is configured to connect with other devices through a communication network. The communication network can be Ethernet, wireless access network, wireless local area network (WLAN) and the like.

[0194] The memory 1401 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic 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 that can be accessed by a computer, but is not limited to this.

[0195] In some embodiments, the memory 1401 can exist independently of the processor 1402, and the memory 1401 can be connected to the processor 1402 via the bus 1404 for storing instructions or program codes. When the processor 1402 invokes and executes the instructions or program codes stored in the memory 1401, the information transmission method provided by the embodiments of the present disclosure can be implemented.

[0196] In some other embodiments, the memory 1401 can also be integrated with the processor 1402.

[0197] The bus 1404 can be an extended industry standard architecture (EISA) bus or the like. The bus 1404 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 14, but it does not mean that there is only one bus or only one type of bus.

[0198] Some embodiments of the present disclosure provide a computer readable storage medium (for example, a non-transitory computer readable storage medium) having computer program instructions stored therein, and when the computer program instructions are run on a computer, the computer executes the information transmission method described in any of the above embodiments.

[0199] In some embodiments, the above computer readable storage medium can include, but is not limited to, a magnetic storage device (for example, a hard disk, a floppy disk, or a magnetic tape, etc.), an optical disc (for example, a compact disk (CD), a digital versatile disc (DVD), etc.), a smart card, and a flash memory device (for example, an erasable programmable read-only memory (EPROM), a card, a stick, or a key drive, etc.). The various computer readable storage media described in the present disclosure can represent one or more devices and / or other machine readable storage media for storing information. The term "machine readable storage medium" can include, but is not limited to, a wireless channel and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0200] The embodiments of the present disclosure provide a computer program product containing instructions, and when the computer program product is run on a computer, the computer executes the information transmission method described in any of the above embodiments.

[0201] The above merely provides a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any change or replacement within the technical scope disclosed by the present disclosure should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A method for information transmission, applied to a first node, the method comprising: sending first information, the first information being used to represent sounding reference signal (SRS) transmission capability of the first node.

2. The method of claim 1, wherein, The first information comprises at least one of the following: frequency domain resource information, antenna configuration information, SRS transmission power related to M antenna ports, SRS insertion capability information related to M antenna ports, path loss information related to M antenna ports, an SRS resource set, configuration information of the SRS resource set, or SRS maximum transmission power of M antenna ports; wherein M is a positive integer.

3. The method of claim 2, wherein, The SRS insertion capability information comprises at least one of the following: an insertion loss value, an insertion capability level, or an antenna port index.

4. The method of claim 3, wherein, One insertion capability level corresponds to one insertion loss threshold value and one insertion loss value in the SRS insertion capability information.

5. The method of claim 3, wherein, The SRS insertion capability information comprises one insertion capability level, and the insertion capability level is an insertion capability level of the M antenna ports.

6. The method of claim 3, wherein, In a case where the number of the insertion capability levels in the SRS insertion capability information and the number of the antenna port indexes are the same, the SRS insertion capability information comprises M insertion capability levels and M antenna port indexes, and one antenna port index corresponds to one insertion capability level.

7. The method of claim 3, wherein, In a case where the number of the insertion capability levels in the SRS insertion capability information and the number of the antenna port indexes are not the same, the SRS insertion capability information comprises a first insertion capability level, N insertion capability levels, and N antenna port indexes; the N antenna ports indicated by the N antenna port indexes correspond to the N insertion capability levels respectively; The first insertion capability level corresponds to other antenna ports in the M antenna ports except the N antenna ports; wherein N is a positive integer.

8. The method of claim 3, wherein, The SRS insertion capability information comprises an insertion capability level n; wherein n is a positive integer; In a case where n is greater than 1, an insertion loss value corresponding to the insertion capability level n in the SRS insertion capability information is not more than an insertion loss threshold value corresponding to the insertion capability level n-1; In a case where n is equal to 1, an insertion loss value corresponding to the insertion capability level n in the SRS insertion capability information is the insertion loss threshold value corresponding to the insertion capability level n.

9. The method of claim 2, wherein, The SRS maximum transmission power related to the M antenna ports is determined by a first insertion loss difference value; wherein the first insertion loss difference value is a difference between a largest insertion loss value and a smallest insertion loss value in the insertion loss values of the M antenna ports.

10. The method of claim 2, wherein, The SRS transmission power comprises SRS transmission power of a target antenna port, and the SRS transmission power of the target antenna port is determined by path loss information of the target antenna port, the SRS maximum transmission power, and a second insertion loss difference value, and the second insertion loss difference value is a difference between an insertion loss value of the target antenna port and a smallest insertion loss value in the insertion loss values of the M antenna ports.

11. The method of claim 1, further comprising: receiving second information, the second information being used to indicate SRS power configuration information of the first node.

12. A method for information transmission, applied to a second node, the method comprising: receive first information, the first information being used to characterize SRS transmission capability of the first node.

13. The method of claim 12, wherein, The first information comprises at least one of the following: frequency domain resource information, antenna configuration information, SRS transmission power related to M antenna ports, SRS insertion 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, or SRS maximum transmission power of M antenna ports; wherein M is a positive integer.

14. The method of claim 13, wherein, The SRS insertion capability information comprises at least one of the following: insertion loss value, insertion capability level, or antenna port index.

15. The method of claim 14, wherein, One insertion capability level corresponds to one insertion loss threshold and one insertion loss value in the SRS insertion capability information.

16. The method of claim 14, wherein, The SRS insertion capability information comprises one insertion capability level, and the insertion capability level is the insertion capability level of the M antenna ports.

17. The method of claim 14, wherein, In the case that the number of the insertion capability levels in the SRS insertion capability information and the number of the antenna port indexes are the same, the SRS insertion capability information comprises M insertion capability levels, and one antenna port index corresponds to one insertion capability level.

18. The method of claim 14, wherein, In the case that the number of the insertion capability levels in the SRS insertion capability information and the number of the antenna port indexes are not the same, the SRS insertion capability information comprises a first insertion capability level, N insertion capability levels, and N antenna port indexes; the N antenna ports indicated by the N antenna port indexes correspond to the N insertion capability levels respectively; The first insertion capability level corresponds to other antenna ports in the M antenna ports except the N antenna ports; wherein N is a positive integer.

19. The method of claim 14, wherein, The SRS insertion capability information comprises insertion capability level n; wherein n is a positive integer; In the case that n is greater than 1, the insertion loss value corresponding to the insertion capability level n in the SRS insertion capability information does not exceed the insertion loss threshold corresponding to the insertion capability level n-1; In the case that n is equal to 1, the insertion loss value corresponding to the insertion capability level n in the SRS insertion capability information is the insertion loss threshold corresponding to the insertion capability level n.

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

21. The method of claim 13, wherein, The SRS transmission power comprises SRS transmission power of a target antenna port, and the SRS transmission power of the target antenna port is determined by the path loss information of the target antenna port, the SRS maximum transmission power, and a second insertion loss difference value, and the second insertion loss difference value is the difference between the insertion loss value of the target antenna port and the minimum insertion loss value in the insertion loss values of the M antenna ports.

22. The method of claim 12, further comprising: in the case that the SRS transmission power of the M antenna ports is greater than a first SRS transmission power, sending second information, and the first SRS transmission power is determined based on a preset insertion loss difference value.

23. The method of claim 12, further comprising: receive a first SRS sent by the M antenna ports, and determine a transmit power of the first SRS; adjust the transmit power of the first SRS based on path loss information of the M antenna ports.

24. The method of claim 12, further comprising: sending an interrogation request message to the first node, the interrogation request message being used to inquire whether the first node has the capability of reporting SRS insertion capability information.

25. A communications device comprising: a memory and a processor; the memory and the processor are coupled; the memory is configured to store instructions executable by the processor; the processor executes the instructions to perform the method according to any one of claims 1-24.

26. A computer readable storage medium, wherein, The computer readable storage medium has stored thereon computer instructions, which, when executed on a computer, cause the computer to perform the method according to any one of claims 1-24.

27. A computer program product, wherein, The computer program product includes computing technology program instructions, which, when executed by a processor, implement the method according to any one of claims 1-24. The computer program product includes computing technology program instructions, which, when executed by a processor, implement the method according to any one of claims 1-24.

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