Information transmission method, device, and system

Abstract

Embodiments of the present application provide an information transmission method. When a network side uses a plurality of TRPs for joint transmission, a terminal device can respectively acquire a first CSI report and a second CSI report on the basis of two different types of reference signal resources transmitted by the TRPs. In the first CSI report, the accuracy of a delay offset determined on the basis of first reference signal resources is higher than the accuracy of a delay offset determined on the basis of second reference signal resources, and therefore, precoding information in the second CSI report is determined on the basis of the delay offsets in the first CSI report, thereby improving the accuracy of a channel state determined by the terminal device, and facilitating subsequent information reception and processing.

Description

Information transmission method, device and system

[0001] The present application claims priority to the Chinese patent application No. 202411368576.3, filed on September 27, 2024, and entitled "Information transmission method, device and system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular to an information transmission method, device and system. BACKGROUND

[0003] Channel state information (CSI) is used to describe the channel properties of a wireless communication link, which can include a channel matrix, a channel quality indicator, and a precoding matrix. Generally, the receiving end (e.g., a terminal device) evaluates the CSI and quantizes it to feed back to the transmitting end (e.g., a base station) through a CSI report, so that the transmitting end adjusts the transmission strategy of the downlink signal according to the CSI report.

[0004] Currently, to improve transmission efficiency, the network side can use multiple transmitting ends for joint transmission. In this scenario, the receiving end needs to feed back the channel information of multiple transmitting ends at the same time. If there is a delay offset between the channels of multiple transmitting ends, the receiving end will not be able to perform coherent reception on the signals from multiple transmitting ends, resulting in performance loss. SUMMARY

[0005] The present application provides an information transmission method, device and system, aiming to improve the accuracy of information transmission.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] In a first aspect, the present application provides an information transmission method, which can be applied to a terminal device. Specifically, the terminal device can obtain a first CSI report based on a first reference signal resource set, wherein the first CSI report includes a delay offset value determined based on a first reference signal resource in the first reference signal resource set. If the relevant information corresponding to the first CSI report and the relevant information corresponding to a second CSI report satisfy a preset condition, the terminal device obtains a second CSI report based on a second reference signal resource set and the first CSI report. The precoding information in the second CSI report is determined based on the delay offset value in the first CSI report. Then, the terminal device sends the first CSI report and the second CSI report to a network device. The accuracy of the delay offset value determined based on the first reference signal resource is higher than that of the delay offset value determined based on the second reference signal resource.

[0008] That is, when the network side performs joint transmission by using multiple transmission reception points (TRPs), the terminal device can obtain the first CSI report and the second CSI report based on two different reference signal resources transmitted by the TRPs. Since the time delay offset value determined based on the first reference signal resource in the first CSI report is more accurate than the time delay offset value determined based on the second reference signal resource, the precoding information of the second CSI report is determined according to the time delay offset value in the first CSI report, thereby improving the accuracy of the channel state determined by the terminal device and facilitating the reception and processing of subsequent information.

[0009] The first reference signal resource and the second reference signal resource are two different types of reference signal resources. The time delay offset value determined based on the first reference signal resource is more accurate than the time delay offset value determined based on the second reference signal resource, the time domain density of the first reference signal resource is higher than the time domain density of the second reference signal resource, and / or the frequency domain density of the first reference signal resource is higher than the frequency domain density of the second reference signal resource. For example, the first reference signal resource is a reference signal for channel state tracking, and the second reference signal resource is a reference signal for channel state acquisition.

[0010] The different first reference signal resources in the first reference signal resource set correspond to different second reference signal resources. That is, one first reference signal resource corresponds to one second reference signal resource. Specifically, the position of a first reference signal resource in the first reference signal resource set is the same as the position of the second reference signal resource corresponding to the first reference signal resource in the second reference signal resource set. For example, the first first reference signal resource in the first reference signal resource set corresponds to the first second reference signal resource in the second reference signal resource set, the second first reference signal resource in the first reference signal resource set corresponds to the second second reference signal resource in the second reference signal resource set, and so on.

[0011] In one possible implementation, a first target reference signal resource is determined from the first reference signal resource set, and a second target reference signal resource is determined from the second reference signal resource set. The time delay offset value in the first CSI report is determined by one first reference signal resource in the first reference signal resource set and the first target reference signal resource.

[0012] Specifically, if one first reference signal resource in the first reference signal resource set and the first target reference signal resource are the same first reference signal resource, the time delay offset value corresponding to the first reference signal resource is 0.

[0013] In a possible implementation, the preset condition comprises one or more of the following: the first CSI report and the second CSI report are triggered by the same signaling; the first CSI report and the second CSI report are transmitted through the same physical channel; a transmission time of the first CSI report is not later than a transmission time of the second CSI report, and a time interval does not exceed a preset time threshold; a transmission time of the first CSI report is not later than a triggering time of the second CSI report, and a time interval does not exceed a preset time threshold.

[0014] In a possible implementation, if all the second reference signal resources in the second set of reference signal resources are used when the second CSI report is acquired, the preset condition comprises: all the time delay offset values corresponding to the first reference signal resources in the first CSI report do not exceed the first threshold.

[0015] In a possible implementation, the method further comprises: the terminal device receives configuration information for the second CSI report sent by the network device, the configuration information comprising first signaling, the first signaling being used to indicate that all the second reference signal resources in the second set of reference signal resources are used to determine the second CSI report.

[0016] In a possible implementation, if part of the second reference signal resources in the second set of reference signal resources are used when the second CSI report is acquired, the preset condition comprises: the part of the second reference signal resources comprises the second reference signal resources corresponding to the first reference signal resources in the first CSI report, time delay offset values of which do not exceed the second threshold.

[0017] In a possible implementation, the terminal device receives configuration information for the second CSI report sent by the network device, the configuration information not comprising the first signaling, the first signaling being used to indicate that all the second reference signal resources in the second set of reference signal resources are used to determine the second CSI report.

[0018] In a possible implementation, if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy a preset condition, the second CSI report does not carry the time delay offset values determined by the second reference signal resources.

[0019] If the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report do not satisfy the preset condition, the second CSI report carries the time delay offset values determined by the second reference signal resources.

[0020] In a possible implementation, the terminal device receives configuration information for the second CSI report sent by the network device, second signaling in the configuration information indicating a first mode, the first mode indicating that the time delay offset values determined by the second reference signal resources need to be carried in the second CSI report.

[0021] In a possible implementation, the terminal device receives configuration information of the second CSI report sent by the network device, and the second signaling indication in the configuration information is the second mode, which indicates that the time delay offset value determined by the second reference signal resource does not need to be carried in the second CSI report.

[0022] In a second aspect, a method for information transmission is provided, which is applied to a network device, such as a base station, and includes: sending a first reference signal resource set and a second reference signal resource set, the first reference signal resource set including at least two first reference signal resources, and the second reference signal resource set including at least two second reference signal resources; and receiving a first CSI report and a second CSI report. The first CSI report is determined based on the first reference signal resource set, and includes a time delay offset value determined based on the first reference signal resource. If the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy a preset condition, the second CSI report is determined based on the second reference signal resource set and the first CSI report, and the precoding information in the second CSI report is determined based on the time delay offset value in the first CSI report.

[0023] In a possible implementation, the network device sends configuration information for the second CSI report to the terminal device, and the configuration information includes first signaling and / or second signaling. The first signaling is used to indicate that the second CSI report is determined by using all the second reference signal resources in the second reference signal resource set, and the second signaling is used to indicate whether to carry the time delay offset value determined based on the second reference signal resource in the second CSI report.

[0024] In a possible implementation, if the second signaling is the first mode, the first mode indicates that the time delay offset value determined by the second reference signal resource needs to be carried in the second CSI report.

[0025] If the second signaling is the second mode, the second mode indicates that the time delay offset value determined by the second reference signal resource does not need to be carried in the second CSI report.

[0026] In a possible implementation, the time domain density of the first reference signal resource is higher than the time domain density of the second reference signal resource, and / or the frequency domain density of the first reference signal resource is higher than the frequency domain density of the second reference signal resource.

[0027] In a possible implementation, the first reference signal resource is a reference signal for channel state tracking, and the second reference signal resource is a reference signal for channel state acquisition.

[0028] In one possible implementation, different first reference signal resources in the first reference signal resource set correspond to different second reference signal resources.

[0029] In one possible implementation, the position of a first reference signal resource in the first set of reference signal resources is the same as the position of its corresponding second reference signal resource in the second set of reference signal resources.

[0030] In one possible implementation, a first target reference signal resource in a first set of reference signal resources corresponds to a second target reference signal resource in a second set of reference signal resources, and the delay offset value in the first CSI report is jointly determined by a first reference signal resource in the first set of reference signal resources and a first target reference signal resource.

[0031] In one possible implementation, if a first reference signal resource in the first reference signal resource set and a first target reference signal resource are the same first reference signal resource, the time delay offset value corresponding to a first reference signal resource in the first reference signal resource set is 0.

[0032] In one possible implementation, the preset conditions include one or more of the following: the first CSI report and the second CSI report are triggered by the same signaling; the first CSI report and the second CSI report are transmitted through the same physical channel; the transmission time of the first CSI report is no later than the transmission time of the second CSI report and the time interval does not exceed a preset duration threshold; the transmission time of the first CSI report is no later than the trigger time of the second CSI report and the time interval does not exceed a preset duration threshold.

[0033] In one possible implementation, when obtaining the second CSI report, all second reference signal resources in the second reference signal resource set are used, and the preset condition includes: the time delay offset value corresponding to each first reference signal resource in the first CSI report does not exceed the first threshold.

[0034] In one possible implementation, when obtaining a second CSI report, a portion of the second reference signal resources in the second reference signal resource set is used, and the preset conditions include: the portion of the second reference signal resources includes the second reference signal resources corresponding to the first reference signal resources in the first CSI report whose delay offset value does not exceed the second threshold.

[0035] In one possible implementation, if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report meet a preset condition, the second CSI report does not carry the delay offset value determined by the second reference signal resource.

[0036] If the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report do not satisfy the preset condition, the second CSI report carries a time delay offset value determined by the second reference signal resource.

[0037] In a third aspect, the present application provides a terminal device, comprising a transceiver and a processor; wherein the transceiver is configured to perform the receiving operation and the sending operation in the method of the first aspect or any of the implementation manners of the first aspect; and the processor is configured to perform the other operations in the method of the first aspect or any of the implementation manners of the first aspect except the receiving operation and the sending operation.

[0038] In a fourth aspect, the present application provides a network element, comprising a transceiver and a processor; wherein the transceiver is configured to perform the receiving operation and the sending operation in the method of the second aspect or any of the implementation manners of the second aspect; and the processor is configured to perform the other operations in the method of the second aspect or any of the implementation manners of the second aspect except the receiving operation and the sending operation.

[0039] In a fifth aspect, the present application provides a communication system, comprising a terminal device and a network element. The terminal device is configured to perform the method of the first aspect or any of the implementation manners of the first aspect, and the network element is configured to perform the method of the second aspect or any of the implementation manners of the second aspect.

[0040] In a sixth aspect, the present application provides a computer storage medium, configured to store a computer program. When the computer program is executed, it is used to implement the method provided by any of the implementation manners of the first aspect to the second aspect.

[0041] In a seventh aspect, the present application provides a computer program product comprising instructions which, when executed on at least one computing device, cause the at least one computing device to carry out the method provided by any of the implementation manners of the first aspect to the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0042] Fig. 1 is a structure diagram of an exemplary communication system provided by the present application;

[0043] Fig. 2 is a flow chart of an information transmission method provided by the present application;

[0044] Fig. 3 is a flow chart of another information transmission method provided by the embodiment of the present application;

[0045] Fig. 4 is a structure diagram of a network element provided by the present application;

[0046] Fig. 5 is a structure diagram of a terminal device provided by the present application. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The terms used in the following embodiments are only for the purpose of describing the specific embodiments and are not intended to be limiting on the present application. As used in the specification and the appended claims of the present application, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “one or more,” in the embodiments of the present application, refer to one, two, or more than two; “and / or” describes the associated objects in the conjunctive relationship, which means that there can be three kinds of relationships; for example, A and / or B, which means that A exists alone, A and B exist together, B exists alone, and A, B can be singular or plural. The character “ / ” generally represents an “or” relationship between the associated objects.

[0048] In the present specification, the reference to “one embodiment” or “some embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Therefore, the statements “in one embodiment,” “in some embodiments,” “in other embodiments,” “in additional embodiments,” and the like appearing in various places throughout the specification are not necessarily all referring to the same embodiment, but are meant to signify “one or more but not all embodiments” unless otherwise specifically indicated. The terms “comprising,” “including,” “having” and their conjugates mean “including but not limited to,” unless otherwise specifically indicated.

[0049] The plurality referred to in the embodiments of the present application means greater than or equal to two. It should be noted that in the description of the embodiments of the present application, the terms “first,” “second,” and the like are used only for the purpose of distinguishing the described purposes, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0050] In actual application scenarios, the terminal device feeds back channel state information, which is beneficial to downlink scheduling by the base station. In particular, when the network side utilizes multiple TRPs for joint transmission, the terminal needs to feed back channel information of multiple transmission points at the same time. If there is a delay offset, a frequency domain offset, and / or a phase offset between the channels of multiple transmission and reception points, the terminal device will not be able to perform coherent reception on the signals from multiple transmission and reception nodes, thereby causing performance loss.

[0051] The TRP can be regarded as a physical component of the base station or a logical functional unit of the base station. In the multiple-input multiple-output technology, the TRP refers to a physical point or a logical point capable of data transmission and reception, which supports data transmission and reception, thereby improving the reliability and efficiency of communication. The number and configuration of TRPs can be adjusted according to specific communication requirements and network design to optimize coverage and capacity. A base station can contain one or more TRPs, which work together to ensure extensive coverage and efficient data transmission. When the TRP only serves as a node for transmitting signals, it can also be referred to as a transmission node; when the TRP only serves as a node for receiving signals, it can also be referred to as a receiving node.

[0052] When multiple TRPs jointly transmit, in order to avoid the terminal device being unable to perform coherent reception due to the offset of the channels corresponding to different TRPs, the present application provides a solution. The terminal device feeds back two CSI reports. The first CSI report contains multiple TRP transmitted time offset values corresponding to the first reference signal resource (each TRP is associated with a time offset value), and the second CSI report is used to feed back the precoding information corresponding to the multiple TRP transmitted second reference signal resource. Among them, the time offset value in the first CSI report is determined based on the first reference signal resource, and its accuracy is higher than that of the time offset value determined based on the second reference signal resource. Based on this, the precoding information in the second CSI report is determined based on the time offset value in the first CSI report, which improves the accuracy of the precoding information in the second CSI report, and further improves the accuracy of the subsequent terminal device receiving signals.

[0053] The communication system to which the present application is applicable can be a fifth generation (5G) communication system, and can also be a LTE and 5G hybrid architecture, or a 5G new radio (5G NR) system, and a new communication system to be developed in future communication development. Among them, the communication system includes at least two devices, and different devices can exchange signals to realize data interaction. For example, the devices included in the communication system can be software defined radio (SDR) terminals and network elements, which can be base stations and the like. The following will be exemplarily described taking the communication system including software radio terminals and network elements as an example.

[0054] An example of a communication system is shown in FIG. 1, which includes a network element 1 and an SDR terminal 2.

[0055] In embodiments provided in the present application, the network element 1 can be any device located at the network side and having wireless transceiving functions, including but not limited to: a base station (gNodeB or gNB) or a transceiving point TRP in new radio (NR), etc. The network element 1 can be: a macro base station, a micro base station, a pico base station, a small station, a relay station, or a balloon station, etc. The network element 1 can include one or more co-sited or non-co-sited TRPs. The network element 1 can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The network element 1 can communicate with the SDR terminal 2, or communicate with the SDR terminal 2 through a relay station.

[0056] The SDR terminal 2 can communicate with multiple network elements of different technologies, for example, the SDR terminal 2 can communicate with a network element supporting an LTE network, and can also communicate with a network element supporting a 5G network, and can also communicate with a network element supporting an LTE network and a network element supporting a 5G network in dual connectivity.

[0057] Among them, the SDR terminal 2 refers to a terminal supporting a software-defined wireless communication protocol. In general, the frequency band, air interface protocol and function of the SDR terminal 2 can be upgraded through software download and update without completely replacing the hardware, which makes the SDR terminal 2 have higher flexibility and upgradability, so as to adapt to various communication environments and needs.

[0058] In embodiments provided in the present application, the SDR terminal 2 can be various forms, for example, a mobile phone, a tablet computer (Pad), a computer with wireless transceiving functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The SDR terminal 2 can be a fixed terminal or a mobile terminal.

[0059] To facilitate understanding of the technical solutions provided in the present application, the following will describe specific embodiments. To facilitate description, the following will take the case of multiple TRPs as an example, each TRP sends two types of reference signal resources to the terminal device, which are first reference signal resources and second reference signal resources.

[0060] Referring to FIG. 2, which is a flow chart of a channel state information reporting transmission method provided in an embodiment of the present application, as shown in FIG. 2, the method comprises:

[0061] S201: obtaining a first CSI report based on a first reference signal resource set.

[0062] S202: if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy a preset condition, obtaining a second CSI report based on a second reference signal resource set and the first CSI report.

[0063] Among them, the precoding information in the second CSI report is determined based on the time delay offset value in the first CSI report.

[0064] Among them, the first reference signal resource set includes at least two first reference signal resources, and the second reference signal resource set includes at least two second reference signal resources. The first reference signal resource and the second reference signal resource are two different types of reference signal resources. In this embodiment, the time domain density of the first reference signal resource is higher than the time domain density of the second reference signal resource, and / or the frequency domain density of the first reference signal resource is higher than the frequency domain density of the second reference signal resource, in which case the accuracy of the time delay offset value determined based on the first reference signal resource is higher than the time delay offset value determined based on the second reference signal resource.

[0065] Among them, the time domain density of the first reference signal resource is higher than the time domain density of the second reference signal resource means that in the same time unit, the first reference signal resource occupies more time domain positions or time domain symbols than the second reference signal resource; the frequency domain density of the first reference signal resource is higher than the frequency domain density of the second reference signal resource means that in the same frequency domain unit, the first reference signal resource occupies more frequency domain positions or frequency domain resources than the second reference signal resource. For example, the first reference signal resource is a reference signal for channel state tracking (CSI-RS for TRS), and the second reference signal resource is a reference signal for channel state acquisition (CSI-RS for CSI).

[0066] Generally, when measuring the channel state, the network side sends a reference signal resource for CSI-RS for CSI to the terminal device. Due to the low time domain and / or frequency domain density of the CSI-RS for CSI signal, the determined time delay offset has an error. Based on this, the network side compensates for the error of the original reference signal resource by sending another reference signal resource CSI-RS for TRS, thereby improving the accuracy of the precoding information determined based on the original reference signal resource.

[0067] It should be noted that, on the one hand, since the CSI-RS for CSI signal can be applied to multi-port transmission, it is suitable for obtaining the precoding matrix required for multi-antenna transmission, thereby facilitating the network to perform multi-antenna transmission, while the CSI-RS for TRS signal is applied to single-port transmission and is not suitable for obtaining the precoding matrix. The CSI-RS for TRS is generally used for tracking channel large-scale information, such as obtaining Doppler spread, Doppler frequency shift, time delay spread, and average time delay information; on the other hand, when determining the precoding information using the CSI-RS for TRS, the overhead of the pilot resource is relatively large. Therefore, the time delay offset value obtained based on the CSI-RS for TRS signal is used to determine the time delay offset information in the precoding information corresponding to the CSI-RS for CSI signal, thereby improving the accuracy of the precoding information, rather than directly determining the precoding information based on the CSI-RS for TRS signal.

[0068] In this embodiment, in order to measure the channel state between the terminal device and different TRPs, the terminal device generates a second CSI report based on different second reference signal resources, which is used to feed back the channel state information corresponding to each TRP. The second CSI report includes the precoding information of the plurality of TRPs. Different TRPs can be distinguished by different second reference signal resource indexes (or second reference resource set indexes), or the TRPs can be indicated by the second reference signal resource indexes (or second reference resource set indexes).

[0069] In this embodiment, when determining the second CSI report, the terminal device receives the second reference signal resource set configured by the network side. Generally, each second reference signal resource corresponds to one TRP.

[0070] In an implementation manner, the terminal device can select a TRP (i.e., select a second reference signal resource from the second reference signal resource set) and feed back a second CSI report in one of the following two ways:

[0071] Option 1: The network configures N second reference signal resources (or reference resource sets) corresponding to N TRPs, and the terminal device feeds back a second CSI report based on N second reference signal resources sent by N TRPs.

[0072] Option 2: The network configures N second reference signal resources (or reference resource sets) corresponding to N TRPs, and the terminal device can select N0 TRPs from N TRPs, and feeds back a second CSI report based on N0 second reference signal resources sent by N0 TRPs. In addition, the terminal device feeds back indication information of the selected N0 TRPs to the network.

[0073] In an embodiment, the terminal receives first signaling sent by the network side, which is used to instruct the terminal device to feed back a second CSI report using option 1. If the terminal does not receive the first signaling, the terminal device feeds back a second CSI report using option 2.

[0074] In an embodiment, the terminal device receives second signaling sent by the network side, which is used to instruct the terminal device whether to feed back delay offset values of multiple TRPs in the second CSI report. For example, the second signaling can indicate one of the following modes:

[0075] Mode 1: The terminal needs to feed back delay offset values determined based on second reference signal resources in the second CSI report;

[0076] Mode 2: The terminal does not need to feed back delay offset values determined based on second reference signal resources in the second CSI report.

[0077] In the second CSI report, the delay offset value of the reference TRP is 0, and the delay offset values of the remaining TRPs are relative to the delay offset of the reference TRP.

[0078] In an embodiment, the reference TRP can be determined by the terminal and indicated in the second CSI report (for example, selecting a TRP corresponding to a second reference signal resource from N second reference signal resources (or reference resource sets) configured by the network, and indicating in the second CSI report), or the reference TRP is the TRP associated with the second reference signal resource (or reference resource set) with the smallest index in the multiple second reference signal resources (or second reference resource sets) configured by the network, or the TRP associated with the first second reference signal resource in the multiple second reference signal resources (or second reference resource sets) configured by the network.

[0079] In an embodiment, the second CSI report can indicate the precoding information of the multiple TRPs, where the precoding information of the reference TRP has a higher priority in the ordering / mapping in the second CSI report than the precoding information of the other TRPs.

[0080] In an embodiment, the precoding information of the different TRPs is ordered / mapped in the second CSI report in a sequence, where the sequence can be determined according to the index size or the configuration order of the second reference signal resources (or the reference resource sets) corresponding to the different TRPs.

[0081] The terminal device generates a first CSI report based on the first reference signal resources corresponding to the multiple TRPs, for feeding back the delay offset values of the multiple TRPs. In the first CSI report, the delay offset value of the reference TRP is 0, and the delay offset values of the other TRPs are relative to the delay offset of the reference TRP. Specifically, the terminal device receives a first reference signal resource set configured by the network when determining the first CSI report, where each first reference signal resource corresponds to a TRP. Alternatively, the terminal device receives multiple first reference signal resource sets configured by the network when determining the first CSI report, where each first reference signal resource set corresponds to a TRP.

[0082] In an embodiment, the reference TRP can be determined by the terminal device and indicated in the first CSI report (e.g., selecting the TRP corresponding to one of the N first reference signal resources (or reference resource sets) configured by the network, and indicating in the first CSI report). Alternatively, the reference TRP is the TRP associated with the first reference signal resource (or reference resource set) with the smallest index among the multiple first reference signal resources (or reference resource sets) configured by the network, or the TRP corresponding to the first first reference signal resource (or reference resource set) among the multiple first reference signal resources (or reference resource sets) configured by the network.

[0083] In an embodiment, the delay offset values of the different TRPs are ordered / mapped in the first CSI report in a sequence, where the sequence can be determined according to the index size or the configuration order of the first reference signal resources (or the first reference resource sets) corresponding to the different TRPs.

[0084] In an embodiment, the maximum time delay offset value that the terminal device can report in the first CSI report does not exceed a threshold value. The threshold value can be configured by the network side. For example, the threshold value is the length of a cyclic prefix (CP) in one orthogonal frequency division multiplexing (OFDM) symbol. For another example, the threshold value can also be less than the length of the CP.

[0085] In an embodiment, the first CSI report can also include an out-of-range indication. For example, the out-of-range indication is used to indicate that the time delay offset of a TRP relative to a reference TRP exceeds the threshold value. For example, if the indication is 1, it means that the time delay offset of the corresponding TRP relative to the reference TRP exceeds the threshold value; if the indication is 0, it means that the time delay offset of the corresponding TRP relative to the reference TRP does not exceed the threshold value. Generally speaking, when the time delay offset of a TRP relative to a reference TRP exceeds the threshold value, the two TRPs are not easy to jointly transmit to the same terminal device at the same time, which increases the difficulty of the terminal device to simultaneously receive signals from the two TRPs.

[0086] It should be noted that different first reference signal resources in the first reference signal resource set correspond to different second reference signal resources, and in general, one first reference signal resource corresponds to one second reference signal resource. The first reference signal resource and the second reference signal resource that have a corresponding relationship correspond to the same TRP. Specifically, the position of a first reference signal resource in the first reference signal resource set is the same as the position of the second reference signal resource having a corresponding relationship with the first reference signal resource in the second reference signal resource set.

[0087] For example, the first reference signal resource with the first ranking or distribution position in the plurality of first reference signal resources configured by the network corresponds to the second reference signal resource with the first ranking or distribution position in the plurality of second reference signal resources, the first reference signal resource with the second ranking or distribution position in the plurality of first reference signal resources configured by the network corresponds to the second reference signal resource with the second ranking or distribution position in the plurality of second reference signal resources, and so on. For another example, the first reference signal resource with the smallest index value in the plurality of first reference signal resources configured by the network corresponds to the second reference signal resource with the smallest index value in the plurality of second reference signal resources, the first reference signal resource with the second smallest index value in the plurality of first reference signal resources configured by the network corresponds to the second reference signal resource with the second smallest index value in the plurality of second reference signal resources, and so on.

[0088] It can be known from the foregoing that the time delay offset value in the first CSI report or the second CSI report is determined based on a reference transmission point, i.e., a first target reference signal resource needs to be selected from a plurality of first reference signal resources, and a second target reference signal resource needs to be selected from a plurality of second reference signal resources, the time delay offset values corresponding to the first target reference signal resource and the second target reference signal resource are both 0 and correspond to the same reference transmission point.

[0089] For example, the first target reference signal resource is a first reference signal resource arranged in the first order among the plurality of first reference signal resources configured by the network, and the second target reference signal resource is a second reference signal resource arranged in the first order among the plurality of second reference signal resources configured by the network. Alternatively, the first target reference signal resource is a first reference signal resource with the smallest index value among the plurality of first reference signal resources configured by the network, and the second target reference signal resource is a second reference signal resource with the smallest index value among the plurality of second reference signal resources configured by the network.

[0090] Specifically, the terminal device indicates the first target reference signal resource selected by it in the first CSI report, and the second target reference signal resource of the second CSI report is determined according to the first target reference signal resource in the first CSI report. That is, the second reference signal resource corresponding to the first target reference signal resource is the second target reference signal resource. For example, the first CSI report indicates that the second first reference signal resource in the plurality of first reference signal resources is selected as the first target reference signal resource, and the second target reference signal resource of the second CSI report is the second second reference signal resource in the plurality of second reference signal resources. In this embodiment, the pre-coding information corresponding to the second target reference signal resource has the highest priority in the ordering / mapping of the second CSI report. Further, the pre-coding information corresponding to the remaining second reference signal resources has an ordering / mapping priority in the second CSI report, which is determined according to the ordering sequence of the second reference signal resources in the second reference signal resource set or according to the index value of the second reference signal resource.

[0091] Alternatively, the terminal device indicates its selected second target reference signal resource in the second CSI report, and the first target reference signal resource selected by the first CSI report is determined according to the second target reference signal resource in the second CSI report. That is, the first reference signal resource corresponding to the second target reference signal resource is the first target reference signal resource. For example, the second target reference signal resource is the second reference signal resource with the smallest index value among the N or N0second reference signal resources, and the first target reference signal resource is the first reference signal resource with the smallest index value among the N or N0first reference signal resources. Alternatively, the second target reference signal resource is the second reference signal resource with the first ranking order among the N or N0second reference signal resources, and the first target reference signal resource is the first reference signal resource with the first ranking order among the N or N0first reference signal resources. In this embodiment, the ranking / mapping priority of the precoding information corresponding to the second target reference signal resource in the second CSI report is the highest. Further, the ranking / mapping priority of the precoding information corresponding to the remaining second reference signal resources in the second CSI report is determined according to the ranking order of the second reference signal resources in the second reference signal resource set or according to the index value of the second reference signal resources.

[0092] In the first CSI report, the time delay offset value corresponding to each first reference signal resource is included, and the time delay offset value is determined by the first reference signal resource and the first target reference signal resource. When the first reference signal resource is the first target reference signal resource, the corresponding time delay offset value is 0.

[0093] It should be noted that, in order to ensure the accuracy of the precoding information in the second CSI report, the time delay offset value in the first CSI report will be considered to determine the precoding information in the second CSI report. Specifically, if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy a preset condition, the first CSI report will be obtained by using the second reference signal resource set and the time delay offset value in the first CSI report when the second CSI report is obtained. In this case, the precoding information in the second CSI report is determined based on the time delay offset value in the first CSI report. The time delay offset value in the first CSI report is determined based on the first reference signal resource.

[0094] If the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report do not satisfy the preset condition, the second CSI report will be obtained directly by using the second reference signal resource set. In this case, the precoding information in the second CSI report is determined based on the time delay offset value in the second CSI report, which is determined based on the second reference signal resource.

[0095] Specifically, before obtaining the second CSI report, the terminal device determines whether the related information corresponding to the two reports respectively satisfies a preset condition. If yes, the terminal device determines the precoding information in the second CSI report by using the time delay offset value in the first CSI report and the second reference signal resource, thereby obtaining the second CSI report. The related information can include triggering signaling of the CSI report, a transmission channel of the CSI report, a transmission time of the CSI report, and the like.

[0096] The preset condition can include one or more of the following:

[0097] The first CSI report and the second CSI report are triggered by the same signaling. For example, the first CSI report and the second CSI report are triggered by the same DCI.

[0098] The first CSI report and the second CSI report are carried in the same physical channel. For example, the first CSI report and the second CSI report are carried in the same PUSCH.

[0099] The time at which the terminal device transmits the first CSI report is not later than the time at which the terminal transmits the second CSI report.

[0100] In an embodiment, the interval between the time at which the terminal device feeds back the first CSI report and the time at which the terminal feeds back the second CSI report does not exceed T, and the value of T can be configured by the network or reported by the terminal device in the capability information.

[0101] In another embodiment, the interval between the time at which the terminal device feeds back the first CSI report and the time at which the second CSI report is triggered (such as the reception time of the DCI triggering the second CSI report) does not exceed T, and the value of T can be configured by the network or reported by the terminal device in the capability information. The triggering refers to the operation of instructing the terminal device to generate the second CSI report by the network side.

[0102] It should be noted that the reason for determining the above preset condition is that the movement of the terminal device can cause the change of the channel environment, and therefore the time delay offset value in the first CSI report can no longer be accurate. If the time delay offset value in the first CSI report is not accurate, it is no longer used to determine the precoding information of the second CSI report.

[0103] In some embodiments, if the first signaling is included in the configuration information sent by the network side to the terminal device, all the second reference signal resources in the second reference signal resource set are used to obtain the second CSI report. In this case, the preset condition includes that the time delay offset values corresponding to each first reference signal resource in the first CSI report do not exceed the first threshold value, or the time delay offset values corresponding to each first reference signal resource are not indicated as exceeding the range. Wherein, the first signaling is used to indicate that all the second reference signal resources in the second reference signal resource set are used to determine the second CSI report, and the first threshold value can be the length L of one OFDM symbol cyclic prefix.

[0104] In some embodiments, if the first signaling is not included in the configuration information sent by the network side to the terminal device, part of the second reference signal resources in the second reference signal resource set are used to obtain the second CSI report. In this case, the preset condition includes that the part of the second reference signal resources includes the second reference signal resources corresponding to the first reference signal resources whose time delay offset values do not exceed the second threshold value in the first CSI report. That is, the second reference signal resources corresponding to the first reference signal resources whose time delay offset values do not exceed the second threshold value in the first CSI report are included in the part of the second reference signal resources, and are all used to determine the second CSI report. At the same time, the part of the second reference signal resources includes the second target reference signal resource corresponding to the first target reference signal resource.

[0105] For example, the first reference signal resource set includes 5 first reference signal resources, which are RS11, RS12, RS13, RS14 and RS15 respectively; the second reference signal resource set includes 5 second reference signal resources, which are RS21, RS22, RS23, RS24 and RS25 respectively. Among them, RS11 corresponds to RS21, RS12 corresponds to RS22, RS13 corresponds to RS23, RS14 corresponds to RS24, and RS15 corresponds to RS25; if the time delay offset values corresponding to RS12, RS13 and RS15 do not exceed the second threshold value, the part of the second reference signal resources used to obtain the second CSI report includes RS22, RS23 and RS25.

[0106] In some embodiments, if the first signaling is not included in the configuration information sent by the network to the terminal device, the second CSI report is obtained by using part of the second reference signal resource set. In this case, the preset condition includes that the part of the second reference signal resource is the second reference signal resource corresponding to the first reference signal resource whose time delay offset value does not exceed the second threshold in the first CSI report. That is, the second reference signal resource corresponding to the first reference signal resource whose time delay offset value does not exceed the second threshold in the first CSI report is part of the second reference signal resource, and is used to determine the second CSI report. At the same time, the part of the second reference signal resource includes the second target reference signal resource corresponding to the first target reference signal resource.

[0107] In some embodiments, if the first signaling is not included in the configuration information sent by the network to the terminal device, the second CSI report is obtained by using part of the second reference signal resource set. In this case, the preset condition includes that the part of the second reference signal resource is the second reference signal resource corresponding to the first reference signal resource whose time delay offset value does not exceed the second threshold in the first CSI report. That is, the second reference signal resource corresponding to the first reference signal resource whose time delay offset value does not exceed the second threshold in the first CSI report is part of the second reference signal resource, and is used to determine the second CSI report. At the same time, the part of the second reference signal resource includes the second target reference signal resource corresponding to the first target reference signal resource.

[0108] In some embodiments, if the first signaling is not included in the configuration information sent by the network to the terminal device, the second CSI report is obtained by using part of the second reference signal resource set. In this case, the preset condition includes that the part of the second reference signal resource is the second reference signal resource corresponding to the first reference signal resource whose time delay offset value does not exceed the second threshold in the first CSI report. That is, the second reference signal resource corresponding to the first reference signal resource whose time delay offset value does not exceed the second threshold in the first CSI report is part of the second reference signal resource, and is used to determine the second CSI report. At the same time, the part of the second reference signal resource includes the second target reference signal resource corresponding to the first target reference signal resource.

[0109] In some embodiments, the terminal device receives the configuration information of the second CSI report sent by the network side, and if the second signaling in the configuration information indicates the first mode, the terminal device judges whether the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy the preset condition after receiving the above configuration information. If yes, the time delay offset value in the first CSI report is used to determine the precoding information in the second CSI report, and the time delay offset value determined by the second reference signal resource is not carried in the second CSI report; if not, the time delay offset value determined by the second reference signal resource is not carried in the second CSI report, and the time delay offset value obtained by the second reference signal resource is used to determine the precoding information in the second CSI report. Wherein, the first mode indicates that the time delay offset value determined by the second reference signal resource needs to be carried in the second CSI report.

[0110] In some embodiments, if the terminal device determines the precoding information in the second CSI report based on the time offset value in the first CSI report, the terminal device receives configuration information of the second CSI report sent by the network, and the second signaling in the configuration information can only indicate the second mode. In this embodiment, the second CSI report does not carry the time offset value determined by the second reference signal resource. Further, the terminal device determines whether the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy a preset condition, and if so, determines the precoding information in the second CSI report based on the time offset value in the first CSI report. The second mode indicates that the second CSI report does not need to carry the time offset value determined by the second reference signal resource.

[0111] In addition, the network side can indicate the terminal device to determine the precoding information in the second CSI report based on the time offset value in the first CSI report by sending configuration information to the terminal device. Specifically, the configuration information can include third signaling indicating that the terminal device can determine the precoding information in the second CSI report based on the time offset value in the first CSI report. After receiving the above configuration information, the terminal device determines whether the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy a preset condition, and if so, determines the precoding information in the second CSI report based on the time offset value in the first CSI report. In this embodiment, the terminal device receives the configuration information of the second CSI report sent by the network side, and the configuration information does not contain the second signaling. Further, in this embodiment, whether the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy a preset condition, the second CSI report does not carry the time offset value determined by the second reference signal resource.

[0112] S203: Send the first CSI report and the second CSI report.

[0113] After obtaining the first CSI report and the second CSI report, the terminal device sends the two CSI reports to the network side, so that the network side determines the state of the downlink transmission channel according to the two CSI reports.

[0114] It should be noted that the precoding information in the second CSI report is used to determine the precoding matrix of the plurality of TRPs, and if the precoding information is obtained based on the time offset value of the first reference signal resource, the precoding matrix corresponding to the ith precoding sub

[0115] The precoding matrix corresponding to the ith precoding sub to compensate for the time offset of the TRP and the reference TRP. is determined by the following formula:

[0116] wherein, A D is the aforementioned threshold, i.e., the maximum time delay offset value that the terminal can feedback; M D = 2 ( , B is the number of bits required for quantizing the time delay offset value; D i is the time delay offset value of the i-th TRP in the second CSI report i ∈{0, 1, 2, …, M D - 1}; D offset,i is the actual time delay offset value of the i-th TRP relative to the reference TRP; S s / 00123Si4e is the size of the precoding subband, which is usually one or more resource blocks (RBs); Δf is the subcarrier spacing; K is the number of resource elements (REs) contained in one RB. Further, for the reference TRP, D offset,i = 0.

[0117] Referring to FIG. 3, which is a flowchart of an information transmission method provided by an embodiment of the present application, as shown in FIG. 3, the method is applied to a network device and includes the following steps:

[0118] S301: Transmit a first reference signal resource set and a second reference signal resource set.

[0119] In this embodiment, the network device configures a first reference signal resource set and a second reference signal resource set, and transmits the two reference signal resource sets to a terminal device, so that the terminal device generates a first CSI report according to the first reference signal resource set and generates a second CSI report according to the second reference signal resource set.

[0120] The first reference signal resource set includes at least two first reference signal resources, and the second reference signal resource set includes at least two second reference signal resources. The first reference signal resource and the second reference signal resource are two different reference signal resources. Specifically, the time domain density of the first reference signal resource is higher than the time domain density of the second reference signal resource, and / or the frequency domain density of the first reference signal resource is higher than the frequency domain density of the second reference signal resource. For example, the first reference signal resource is a reference signal for channel state tracking, and the second reference signal resource is a reference signal for channel state acquisition.

[0121] In this embodiment, different first reference signal resources in the first reference signal resource set correspond to different second reference signal resources, i.e., one first reference signal resource corresponds to one second reference signal resource. Specifically, the position of one first reference signal resource in the first reference signal resource set is the same as the position of the second reference signal resource corresponding to the first reference signal resource in the second reference signal resource set. For the correspondence between the first reference signal resource and the second reference signal resource, please refer to the related description in the above embodiments.

[0122] The first target reference signal resource in the first reference signal resource set corresponds to the second target reference signal resource in the second reference signal resource set, and the time delay offset value in the first CSI report is determined by one first reference signal resource in the first reference signal resource set and the first target reference signal resource. Each first reference signal resource corresponds to a time delay offset value. If one first reference signal resource in the first reference signal resource set and the first target reference signal resource are the same first reference signal resource, the time delay offset value corresponding to the first reference signal resource is 0.

[0123] S302: receiving the first CSI report and the second CSI report.

[0124] The first CSI report is determined based on the first reference signal resource set, and the first CSI report includes a time delay offset value determined based on the first reference signal resource.

[0125] If the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy a preset condition, the second CSI report is determined based on the second reference signal resource set and the first CSI report, and the precoding information in the second CSI report is determined based on the time delay offset value in the first CSI report.

[0126] If the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report do not satisfy the preset condition, the second CSI report is determined based on the second reference signal resource set, and the precoding information in the second CSI report is determined based on the time delay offset value obtained based on the second reference signal resource. The second CSI report can include a time delay offset value determined based on the second reference signal resource.

[0127] The preset condition includes one or more of the following: the first CSI report and the second CSI report are triggered by the same signaling; the first CSI report and the second CSI report are transmitted through the same physical channel; the transmission time of the first CSI report is not later than the transmission time of the second CSI report, and the time interval does not exceed a preset time threshold; the transmission time of the first CSI report is not later than the triggering time of the second CSI report, and the time interval does not exceed a preset time threshold.

[0128] In some implementations, if all the second reference signal resources in the second set of reference signal resources are used to obtain the second CSI report, the preset condition comprises that all the time delay offset values corresponding to the first reference signal resources in the first CSI report do not exceed the first threshold.

[0129] In some implementations, if only part of the second reference signal resources in the second set of reference signal resources are used to obtain the second CSI report, the preset condition comprises that the part of the second reference signal resources includes the second reference signal resources corresponding to the first reference signal resources in the first CSI report whose time delay offset values do not exceed the second threshold.

[0130] It should be noted that the specific forms of the preset condition can be referred to the related description in the above embodiments.

[0131] In this embodiment, the network device can further send configuration information of the second CSI report, and the configuration information comprises the first signaling and / or the second signaling. The first signaling is used to indicate that all the second reference signal resources in the second set of reference signal resources are used to determine the second CSI report, and the second signaling is used to indicate whether to carry the time delay offset values determined based on the second reference signal resources in the second CSI report.

[0132] If the second signaling is the first mode, the first mode indicates that the time delay offset values determined based on the second reference signal resources need to be carried in the second CSI report.

[0133] If the second signaling is the second mode, the second mode indicates that the time delay offset values determined based on the second reference signal resources do not need to be carried in the second CSI report. It should be noted that the information carried in the configuration information can be referred to the related description in the above embodiments.

[0134] Specifically, if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy the preset condition, the time delay offset values determined based on the second reference signal resources are not carried in the second CSI report; if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report do not satisfy the preset condition, the time delay offset values determined based on the second reference signal resources are carried in the second CSI report.

[0135] In some implementations, the configuration information can comprise third signaling, and the third signaling indicates that the terminal device can determine the precoding information in the second CSI report based on the time delay offset values in the first CSI report. In this implementation, the second signaling is not included in the configuration information.

[0136] It should be noted that some related descriptions in this embodiment can be referred to the method embodiments described in FIG. 2, which will not be repeated here.

[0137] Next, the hardware implementation of the network element 1 and the SDR terminal 2 in FIG. 1 will be further introduced in combination with FIG. 4 and FIG. 5.

[0138] Referring to FIG. 4, a schematic diagram of a hardware structure of a network element is shown, which can be used to execute the method executed by the network element 1 in the embodiments shown in FIG. 2 and FIG. 3. The network element shown in FIG. 4 includes at least one processor 111, at least one memory 112, at least one transceiver 113, at least one network interface 114, and one or more antennas 115. The processor 111, the memory 112, the transceiver 113, and the network interface 114 are connected, for example, through a bus, and in the embodiments of the present application, the connection can include various interfaces, transmission lines, or buses, etc., which are not limited in the embodiments. The antenna 115 is connected with the transceiver 113. The network interface 114 is used to enable the network element to be connected with other communication devices through a communication link, for example, the network interface 114 can include the network interface between the network element and the network element in the core network, for example, the S1 interface, and the network interface can include the network interface between the network element and other network elements, for example, the X2 or Xn interface.

[0139] Among them, the processor 111 shown in FIG. 4 can specifically complete the actions of the network element processing in the above method, the memory 112 can complete the actions of storing in the above method, the transceiver 113 and the antenna 115 can execute the transceiving actions on the air interface in the above method, and the network interface 114 can complete the actions of interacting with the network element or other network elements in the above method.

[0140] The processor in the embodiments of the present application, for example, the processor 111, can include but is not limited to at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, and various computing devices running software, each of which can include one or more cores for executing software instructions to perform operations or processing. The processor can be a separate semiconductor chip, or can be integrated with other circuits as a semiconductor chip, for example, it can be integrated with other circuits (such as coding and decoding circuits, hardware acceleration circuits, or various bus and interface circuits) to form a SoC (system on chip), or it can be integrated as a built-in processor in an ASIC. In addition to including cores for executing software instructions to perform operations or processing, the processor can further include necessary hardware accelerators, such as FPGA (field programmable gate array), PLD (programmable logic device), or logic circuits implementing special logic operations.

[0141] The memory in the embodiments of the present application can include at least one of the following types: read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, and can also be electrically erasable programmable read-only memory (EEPROM). In some scenarios, the memory can also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but not limited to this.

[0142] The memory 112 can exist independently and be connected to the processor 111. Alternatively, the memory 112 can be integrated with the processor 111, for example, integrated in a chip. The memory 112 can store program codes for executing the technical solutions of the embodiments of the present application and be controlled to execute by the processor 111. Various computer program codes executed can also be regarded as a driver of the processor 111. For example, the processor 111 is configured to execute the computer program codes stored in the memory 112, so as to implement the technical solutions in the embodiments of the present application.

[0143] The transceiver 113 can be configured to support the receiving or transmitting of radio frequency signals between the network element and other devices. The transceiver 113 can be connected with the antenna 115. The transceiver 113 includes a transmitter Tx and a receiver Rx. Specifically, the one or more antennas 115 can receive radio frequency signals, the receiver Rx of the transceiver 113 is configured to receive the radio frequency signals from the antenna and convert the radio frequency signals into digital baseband signals or digital intermediate frequency signals, and provide the digital baseband signals or digital intermediate frequency signals to the processor 111 for further processing, such as demodulation processing and decoding processing, by the processor 111. In addition, the transmitter Tx in the transceiver 113 is also configured to receive modulated digital baseband signals or digital intermediate frequency signals from the processor 111, and convert the modulated digital baseband signals or digital intermediate frequency signals into radio frequency signals, and transmit the radio frequency signals through the one or more antennas 115. Specifically, the receiver Rx can selectively perform one or more levels of down-mixing processing and analog-digital conversion processing to obtain the digital baseband signals or digital intermediate frequency signals, and the order of the down-mixing processing and analog-digital conversion processing can be adjustable. The transmitter Tx can selectively perform one or more levels of up-mixing processing and digital-analog conversion processing to obtain the radio frequency signals, and the order of the up-mixing processing and digital-analog conversion processing can be adjustable. The digital baseband signals and the digital intermediate frequency signals can be collectively referred to as digital signals.

[0144] FIG. 5 is an example of a terminal device, such as a mobile phone, a smart wearable device (e.g., a smart watch), etc., according to an embodiment of the present application. The terminal device can include a processor 310, an external memory interface 320, an internal memory 321, a display screen 330, a camera 340, an antenna 1, an antenna 2, a mobile communication module 350, a wireless communication module 360, etc.

[0145] It can be understood that the structure illustrated in the embodiment is not a specific limitation on the terminal device. In other embodiments, the terminal device can include more or fewer components than those illustrated, or combine certain components, or split certain components, or different arrangement of components. The illustrated components can be implemented in hardware, software, or a combination of software and hardware.

[0146] The processor 310 can include one or more processing units, for example: the processor 310 can include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a time-frequency codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units can be independent devices, or can be integrated in one or more processors.

[0147] It can be understood that the interface connection relationship between the modules shown in the embodiment is only illustrative and does not constitute a structural limitation of the terminal device. In other embodiments of the present application, the terminal device can also use different interface connection modes or combinations of multiple interface connection modes in the above embodiments.

[0148] The external memory interface 320 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the SDR terminal. The external memory card communicates with the processor 310 through the external memory interface 320 to realize data storage functions. For example, music, time-frequency, and other files are saved in the external memory card.

[0149] The internal memory 321 can be used to store computer executable program codes, and the executable program codes include instructions. The processor 310 executes various functions of the terminal device and data processing by running the instructions stored in the internal memory 321. The internal memory 321 can include a program storage area and a data storage area. The program storage area can store an operating system, at least one application program required by a function (such as a sound playing function, an image playing function, etc.), etc. The data storage area can store data created during the use of the SDR terminal (such as time-frequency stream data), etc. In addition, the internal memory 321 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), etc. The processor 310 executes various functions of the terminal device and data processing by running the instructions stored in the internal memory 321 and / or the instructions stored in the memory arranged in the processor.

[0150] The wireless communication function of the terminal device can be implemented by the antenna 1, the antenna 2, the mobile communication module 350, the wireless communication module 360, the modem processor, the baseband processor, and the like.

[0151] The antenna 1 and the antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the terminal device can be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example, the antenna 1 can be multiplexed as a diversity antenna of a wireless local area network. In some other embodiments, the antennas can be used in combination with a tuning switch.

[0152] The mobile communication module 350 can provide a solution including 2G / 3G / 4G / 5G wireless communication applied to the terminal device. The mobile communication module 350 can include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), and the like. The mobile communication module 350 can receive electromagnetic waves by the antenna 1, and perform filtering, amplification, and the like on the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processor for demodulation. The mobile communication module 350 can also amplify the signals modulated by the modem processor, and convert the signals into electromagnetic waves to be radiated by the antenna 1. In some embodiments, at least part of the functional modules of the mobile communication module 350 can be arranged in the processor 310. In some embodiments, at least part of the functional modules of the mobile communication module 350 and at least part of the modules of the processor 310 can be arranged in the same device.

[0153] In some embodiments, the terminal device initiates or receives a call request by the mobile communication module 350 and the antenna 1.

[0154] In addition, an operating system such as an iOS operating system, an Android operating system, a Windows operating system, and the like is run on the above components. An application program can be installed and run on the operating system. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the explanation and beneficial effects of the above-mentioned related content in any of the terminal devices can refer to the corresponding method embodiments provided above, and will not be described here.

[0155] In addition, the embodiments of the present application also provide a computer readable storage medium, which stores instructions, and when the instructions are run on one or more computing devices, the one or more computing devices perform the communication method described in the above embodiments.

[0156] Further, the embodiments of the present application also provide a computer program product, which is executed by one or more computing devices, and the one or more computing devices execute any one of the aforementioned communication methods. The computer program product can be a software installation package, and when any one of the aforementioned communication methods needs to be used, the computer program product can be downloaded and executed on a computer.

[0157] Those skilled in the art can clearly understand the present application by the description of the foregoing embodiments, and the present application can be realized by means of software and necessary general hardware, and of course, can also be realized by special hardware including special integrated circuits, special CPUs, special memories, special components and devices, etc. Generally, functions completed by computer programs can be easily realized by corresponding hardware, and specific hardware structures for realizing the same functions can also be various, such as analog circuits, digital circuits or special circuits, etc. However, for the present application, software program implementation is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk, a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk of a computer, etc., and includes a plurality of instructions for causing a computer device (which can be a personal computer, a training device or a network device, etc.) to execute the methods described in the embodiments of the present application.

[0158] In the above embodiments, all or part can be realized by software, hardware, firmware or any combination thereof. When realized by software, all or part can be realized in the form of a computer program product.

[0159] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the flow or function described in the embodiments of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, training device or data center to another website, computer, training device or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

[0160] The system architecture and business scenarios described in the embodiments of the present application are used to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, as the network architecture evolves and new business scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

Claims

1. An information transfer method, characterized by, The method comprises: obtaining a first channel state information (CSI) report based on a first reference signal resource set, the first reference signal resource set comprising at least two first reference signal resources, and the first CSI report comprising a time delay offset value determined based on the first reference signal resources; if relevant information corresponding to the first CSI report and relevant information corresponding to a second CSI report satisfy a preset condition, obtaining the second CSI report based on a second reference signal resource set and the first CSI report, the second reference signal resource set comprising at least two second reference signal resources, and precoding information in the second CSI report being determined based on the time delay offset value in the first CSI report; transmitting the first CSI report and the second CSI report.

2. The method of claim 1, wherein, The time domain density of the first reference signal resources is higher than the time domain density of the second reference signal resources, and / or the frequency domain density of the first reference signal resources is higher than the frequency domain density of the second reference signal resources.

3. The method according to claim 1 or 2, characterized in that, The first reference signal resources are reference signals for channel state tracking, and the second reference signal resources are reference signals for channel state acquisition.

4. The method according to any one of claims 1 to 3, characterized in that, One first reference signal resource in the first reference signal resource set corresponds to one second reference signal resource, and the position of one first reference signal resource in the first reference signal resource set is the same as the position of the second reference signal resource corresponding thereto in the second reference signal resource set.

5. The method of claim 4, wherein, The first target reference signal resource in the first reference signal resource set corresponds to the second target reference signal resource in the second reference signal resource set, and the time delay offset value in the first CSI report is determined by one first reference signal resource in the first reference signal resource set and the first target reference signal resource.

6. The method of claim 5, wherein, If one first reference signal resource in the first reference signal resource set and the first target reference signal resource are the same first reference signal resource, the time delay offset value corresponding to one first reference signal resource in the first reference signal resource set is 0.

7. The method according to any one of claims 1 to 6, characterized in that, The preset condition comprises one or more of the following: The first CSI report and the second CSI report are triggered by the same signaling; The first CSI report and the second CSI report are transmitted through the same physical channel; The transmission time of the first CSI report is not later than the transmission time of the second CSI report, and the time interval does not exceed a preset time threshold; The transmission time of the first CSI report is not later than the triggering time of the second CSI report, and the time interval does not exceed a preset time threshold.

8. The method according to any one of claims 1 to 7, characterized in that, If all second reference signal resources in the second reference signal resource set are used when the second CSI report is obtained, the preset condition comprises that the time delay offset value corresponding to each first reference signal resource in the first CSI report does not exceed a first threshold.

9. The method of claim 8, wherein, The method further comprises: receiving configuration information of the second CSI report, the configuration information comprising first signaling indicating that all second reference signal resources in the second reference signal resource set are used to determine the second CSI report.

10. The method according to any one of claims 1 to 7, characterized in that, If the second CSI report is obtained by using part of the second reference signal resources in the second reference signal resource set, the preset condition comprises that the part of the second reference signal resources comprises a second reference signal resource corresponding to a first reference signal resource in the first CSI report, and a time delay offset value of the first reference signal resource does not exceed a second threshold.

11. The method of claim 10, wherein, The method further comprises: receiving configuration information of the second CSI report, the configuration information not comprising first signaling indicating that all second reference signal resources in the second reference signal resource set are used to determine the second CSI report.

12. The method of any one of claims 1-11, wherein, if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy the preset condition, the second CSI report does not carry a time delay offset value determined by the second reference signal resource; if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report do not satisfy the preset condition, the second CSI report carries a time delay offset value determined by the second reference signal resource.

13. The method of claim 12, wherein, The method further comprises: receiving configuration information of the second CSI report, the second signaling in the configuration information being indicated as a first mode, the first mode indicating that a time delay offset value determined by the second reference signal resource needs to be carried in the second CSI report.

14. The method according to any one of claims 1 to 13, characterized in that The method further comprises: receiving configuration information of the second CSI report, the second signaling in the configuration information being indicated as a second mode, the second mode indicating that a time delay offset value determined by the second reference signal resource does not need to be carried in the second CSI report.

15. An information transmission method, characterized by, The method comprises: sending a first reference signal resource set and a second reference signal resource set, the first reference signal resource set comprising at least two first reference signal resources, and the second reference signal resource set comprising at least two second reference signal resources; receiving a first CSI report and a second CSI report, the first CSI report being determined based on the first reference signal resource set, and the first CSI report comprising a time delay offset value determined based on the first reference signal resource; wherein, if relevant information corresponding to the first CSI report and relevant information corresponding to the second CSI report satisfy a preset condition, the second CSI report is determined based on the second reference signal resource set and the first CSI report, and precoding information in the second CSI report is determined based on the time delay offset value in the first CSI report.

16. The method of claim 15, wherein, The method further comprises: The configuration information for sending the second CSI report includes first signaling and / or second signaling, the first signaling is used to indicate that all the second reference signal resources in the second reference signal resource set are used to determine the second CSI report, and the second signaling is used to indicate whether to carry a time delay offset value determined based on the second reference signal resource in the second CSI report.

17. The method of claim 16, wherein, If the second signaling is a first mode, the first mode indicates that the time delay offset value determined by the second reference signal resource needs to be carried in the second CSI report. If the second signaling is a second mode, the second mode indicates that the time delay offset value determined by the second reference signal resource does not need to be carried in the second CSI report.

18. The method according to any one of claims 15-17, characterized by, The time domain density of the first reference signal resource is higher than the time domain density of the second reference signal resource, and / or the frequency domain density of the first reference signal resource is higher than the frequency domain density of the second reference signal resource.

19. The method of claim 18, wherein, The first reference signal resource is a reference signal for channel state tracking, and the second reference signal resource is a reference signal for channel state acquisition.

20. The method according to any one of claims 15-19, characterized by, One first reference signal resource in the first reference signal resource set corresponds to one second reference signal resource, and the position of one first reference signal resource in the first reference signal resource set is the same as the position of the corresponding second reference signal resource in the second reference signal resource set.

21. The method of claim 20, wherein, The first target reference signal resource in the first reference signal resource set corresponds to the second target reference signal resource in the second reference signal resource set, and the time delay offset value in the first CSI report is determined by one first reference signal resource in the first reference signal resource set and the first target reference signal resource.

22. The method of claim 21, wherein, If one first reference signal resource in the first reference signal resource set and the first target reference signal resource are the same first reference signal resource, the time delay offset value corresponding to one first reference signal resource in the first reference signal resource set is 0.

23. The method according to any one of claims 15-22, characterized by, The preset condition includes one or more of the following: The first CSI report and the second CSI report are triggered by the same signaling. The first CSI report and the second CSI report are transmitted through the same physical channel. The transmission time of the first CSI report is not later than the transmission time of the second CSI report, and the time interval does not exceed a preset time threshold. The transmission time of the first CSI report is not later than the triggering time of the second CSI report, and the time interval does not exceed a preset time threshold.

24. The method according to any one of claims 15-23, characterized by, If all the second reference signal resources in the second reference signal resource set are used to obtain the second CSI report, the preset condition includes that the time delay offset value corresponding to each first reference signal resource in the first CSI report does not exceed a first threshold.

25. The method according to any one of claims 15-23, characterized by, The preset condition comprises that, if the second CSI report is acquired by using part of the second reference signal resources in the second reference signal resource set, the part of the second reference signal resources contains the second reference signal resource corresponding to the first reference signal resource whose time delay offset value in the first CSI report does not exceed a second threshold.

26. The method of any of claims 15-25, wherein, if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report satisfy the preset condition, the second CSI report does not carry the time delay offset value determined by the second reference signal resource; if the relevant information corresponding to the first CSI report and the relevant information corresponding to the second CSI report do not satisfy the preset condition, the second CSI report carries the time delay offset value determined by the second reference signal resource.

27. A terminal device, comprising: comprising: a transceiver configured to perform the receiving operation and the sending operation in the method of any of claims 1-14; a processor configured to perform the operations in the method of any of claims 1-14 other than the receiving operation and the sending operation.

28. A network element, characterized by comprising: a transceiver configured to perform the receiving operation and the sending operation in the method of any of claims 15-26; a processor configured to perform the operations in the method of any of claims 15-26 other than the receiving operation and the sending operation.

29. A communication system, characterized by comprising a terminal and a network element; the terminal is configured to perform the method of any of claims 1-14; the network element is configured to perform the method of any of claims 15-26.

30. A computer storage medium, comprising, a computer program product for storing a computer program, when executed, for implementing the information transmission method of any of claims 1-26.

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