Transmission Method, Device, First Communication Node, Second Communication Node and Medium

Abstract

The present application provides a transmission method, apparatus, first communication node, second communication node and medium. The method sends indication information, where the indication information is used to instruct the second communication node to send an uplink signal or to instruct the second communication node to receive a downlink signal; and performs signal transmission with the second communication node according to the indication information.

Description

[0001] This application is a divisional application of a Chinese patent application with the application number "201910980440.0", the application date of "October 15, 2019", and the title of "Transmission Method, Apparatus, First Communication Node, Second Communication Node, and Medium". Technical Field

[0002] This application relates to a wireless communication network, and for example, relates to a transmission method, apparatus, first communication node, second communication node, and medium. Background Art

[0003] With the development of communication technologies, the demand for data services has been increasing continuously. Based on the uplink signals sent by a second communication node, such as sounding reference signals (SRS), signals of a physical uplink shared channel (PUSCH), etc., a first communication node can determine the channel state information of the second communication node, and accordingly perform operations such as frequency-domain selective scheduling and closed-loop power control; in addition, the first communication node can also send downlink signals, such as channel state information-reference signals (CSI-RS), physical downlink shared channels (PDSCH), etc., to the second communication node for reception, processing, or measurement by the second communication node. In the process of the above signal transmission, there are various different situations, such as the second communication node may be configured with multiple antenna groups, and the uplink signal or downlink signal may be transmitted through different uplink or downlink time slots. In the prior art, the flexibility of signal transmission between the first communication node and the second communication node is poor, and it is impossible to ensure effective and accurate signal transmission in all situations, and even lead to inconsistent signal sending and receiving links, affecting communication reliability. Summary of the Invention

[0004] This application provides a transmission method, apparatus, first communication node, second communication node, and medium to improve the flexibility of signal transmission and communication reliability.

[0005] An embodiment of this application provides a transmission method, including:

[0006] Sending indication information, where the indication information is used to instruct the second communication node to send an uplink signal or to instruct the second communication node to receive a downlink signal;

[0007] Performing signal transmission with the second communication node according to the indication information.

[0008] An embodiment of the present application also provides a transmission method, including:

[0009] Receiving indication information, where the indication information is used to instruct a second communication node to send an uplink signal or to instruct the second communication node to receive a downlink signal;

[0010] Performing signal transmission with a first communication node according to the indication information.

[0011] An embodiment of the present application also provides a transmission device, including:

[0012] A sending module configured to send indication information, where the indication information is used to instruct a second communication node to send an uplink signal or to instruct the second communication node to receive a downlink signal;

[0013] A first transmission module configured to perform signal transmission with the second communication node according to the indication information.

[0014] An embodiment of the present application also provides a transmission device, including:

[0015] A receiving module configured to receive indication information, where the indication information is used to instruct a second communication node to send an uplink signal or to instruct the second communication node to receive a downlink signal;

[0016] A second transmission module configured to perform signal transmission with a first communication node according to the indication information.

[0017] An embodiment of the present application also provides a first communication node, including:

[0018] One or more processors;

[0019] A storage device for storing one or more programs;

[0020] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned transmission method.

[0021] An embodiment of the present application also provides a second communication node, including:

[0022] One or more processors;

[0023] A storage device for storing one or more programs;

[0024] When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned transmission method.

[0025] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned transmission method is implemented. Description of the Drawings

[0026] Figure 1 Flow chart of a transmission method provided for an embodiment;

[0027] Figure 2 Schematic diagram showing that the time slot offset parameter of signal transmission is modified in an embodiment;

[0028] Figure 3 Flow chart of another transmission method provided for an embodiment;

[0029] Figure 4 Schematic structural diagram of a transmission device provided for an embodiment;

[0030] Figure 5 Schematic structural diagram of another transmission device provided for an embodiment;

[0031] Figure 6 Schematic structural diagram of a first communication node provided for an embodiment;

[0032] Figure 7 Schematic structural diagram of a second communication node provided for an embodiment. Detailed Description of the Embodiments

[0033] The present application will be described below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other. Additionally, it should be noted that for ease of description, only the parts related to the present application rather than all the structures are shown in the drawings.

[0034] In Long Term Evolution (LTE), the Physical Downlink Control Channel (PDCCH) is used to carry Downlink Control Information (DCI), which may include uplink and downlink scheduling information as well as uplink power control information. DCI formats include DCI format 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, etc. In the evolved LTE-A Release 12, DCI format 2B, 2C, and 2D are added to support various different applications and transmission modes. A first communication node may configure a device of a second communication node through DCI. For example, the first communication node may be an evolved Node B (e-Node-B, abbreviated as eNB), and the second communication node may be a User Equipment (UE). Alternatively, the device of the second communication node may be configured by higher layers, that is, the second communication node is configured through higher layer signaling.

[0035] A Sounding Reference Signal (SRS) is a signal used between a second communication node and a first communication node to measure Channel State Information (CSI). In a Long Term Evolution system, the second communication node may periodically transmit an uplink SRS on the last data symbol of a transmission subframe according to parameters such as the frequency band, frequency domain position, sequence cyclic shift, period, and subframe offset indicated by the first communication node. The first communication node determines the uplink CSI of the second communication node based on the received SRS and performs operations such as frequency domain selective scheduling and closed-loop power control according to the obtained CSI.

[0036] It was proposed in LTE-A Release 10 that non-precoded SRS, that is, antenna-specific SRS, can be used in uplink communication, while precoding is performed on the Demodulation Reference Signal (DMRS) of PUSCH. By receiving non-precoded SRS, the first communication node can estimate the original uplink CSI, while the original uplink CSI cannot be estimated based on precoded DMRS. In this case, when the second communication node uses multiple antennas to send non-precoded SRS, the SRS resources required by each second communication node will increase, resulting in a decrease in the number of second communication nodes that can be multiplexed simultaneously within the wireless communication system. The second communication node can be triggered to send SRS through high-layer signaling (also known as triggering through trigger type 0) or DCI (also known as triggering through trigger type 1). The high-layer signaling triggers periodic SRS, and DCI triggers aperiodic SRS. The method of sending aperiodic SRS was added in LTE-A Release 10, which improved the utilization rate of SRS resources to a certain extent and enhanced the flexibility of resource scheduling.

[0037] With the development of communication technologies, the demand for data services has been increasing continuously, and the available low-frequency carriers have become extremely scarce. Therefore, communication based on high-frequency (30 - 300 GHz) carriers that have not been fully utilized has become one of the important communication means to solve future high-speed data communication. High-frequency carrier communication has a very large available bandwidth and can provide effective high-speed data communication. However, a major technical challenge faced by high-frequency carrier communication is that, compared with low-frequency signals, high-frequency signals experience very large fading in space. Although this leads to spatial fading loss problems in outdoor communication of high-frequency signals, due to the reduction of their wavelength, more antennas can usually be used, and thus communication based on beams can be carried out to compensate for the spatial fading loss. However, when the number of antennas increases, each antenna requires a set of radio frequency links, and digital beamforming also brings problems of increased cost and power loss. Therefore, current research tends to use hybrid beamforming, that is, radio frequency beams and digital beams jointly form the final beam.

[0038] To sum up, there are various different situations during signal transmission. For example, the second communication node may be configured with multiple antenna groups, and the uplink or downlink signal may be transmitted through different uplink or downlink time slots, etc. In the prior art, the flexibility of signal transmission between the first communication node and the second communication node is poor, and it cannot ensure effective and accurate signal transmission in all situations, and even leads to inconsistent signal sending and receiving links, affecting communication reliability.

[0039] In an embodiment of the present application, a transmission method is provided. By sending indication information to instruct a second communication node to send an uplink signal or receive a downlink signal, it is applicable to various signal transmission scenarios, improving the flexibility of signal transmission between a first communication node and a second communication node and ensuring the reliability of transmission.

[0040] In the following embodiments, the first communication node may be a base station of a macro cell, a base station or a transmission node of a small cell, a sending node in a high-frequency communication system, a sending node in an Internet of Things system, a satellite node, etc., and the second communication node may be a node in a communication system such as a UE, a mobile phone, a portable device, a vehicle, a satellite node, etc.

[0041] In the following embodiments, the uplink signal may be an SRS, an uplink DMRS, an uplink signal for random access, a PUSCH signal, or a phase tracking reference signal.

[0042] In the following embodiments, the information of the antenna or antenna group may be the identification information of the antenna or antenna group, the port information of the antenna or antenna group, or the beam identification information corresponding to the antenna or antenna group.

[0043] In the following embodiments, the information indicating the SRS resource may be an SRS sequence, an SRS time-frequency position parameter, etc.

[0044] In the following embodiments, through the antenna switching of the SRS, the channel reciprocity problem when the number of transmission links and the number of reception links of the second communication node are inconsistent can be solved. For example, the case where the second communication node is configured as 1T2R, 2T4R, 4T8R, where T represents the number of transmission links and R represents the number of reception links. For example, 1T2R means the number of transmission links is 1 and the number of reception links is 2.

[0045] In the following embodiments, a time slot is used as the time unit, and the time unit may also be a symbol, a subframe, or a frame.

[0046] Figure 1 It is a flowchart of a transmission method provided for an embodiment. The transmission method provided in this embodiment can be applied to a first communication node, such as Figure 1 shown, and this method includes step 110 and step 120.

[0047] In step 110, send indication information, where the indication information is used to instruct the second communication node to send an uplink signal or to instruct the second communication node to receive a downlink signal.

[0048] In step 120, perform signal transmission with the second communication node according to the indication information.

[0049] The transmission method in this embodiment, by sending indication information to instruct the second communication node to send an uplink signal or receive a downlink signal, is applicable to various signal transmission scenarios, improving the flexibility of signal transmission between the first communication node and the second communication node and ensuring the reliability of transmission.

[0050] In one embodiment, the indication information includes antenna group association parameters, and the antenna group association parameters correspond to the antenna group for sending the uplink signal.

[0051] In one embodiment, it further includes at least one of the following:

[0052] Configure the antenna group association parameters in the measurement reference signal SRS resources or SRS resource sets configured by high-layer signaling;

[0053] Scramble the cyclic redundancy check code corresponding to the downlink control information DCI according to the mask of antenna group selection, where the indication information is sent through the DCI.

[0054] For example, the first communication node can be a base station, and the second communication node can be a UE. For a UE supporting 2T4R, the UE antennas can be divided into two groups, with each group of antennas supporting 1T2R. The base station can determine which group of antenna configurations is better by measuring the uplink signal and instruct the UE to send the uplink signal on that group of antennas through signaling. The methods for instructing the UE to send the uplink signal on a certain group of antennas through signaling include at least one of the following:

[0055] 1) In the SRS resource set or SRS resource configured by high-layer signaling, configure the antenna group association parameters, and the antenna group association parameters are used to indicate antenna group 0 or antenna group 1. For example, configure the antenna group association parameters for antenna group 0 and antenna group 1 respectively, which are used to indicate the antenna group for sending the aperiodic SRS, and configure the corresponding aperiodic SRS resource trigger for the antenna group association parameters;

[0056] 2) Dynamically indicate the antenna group for the UE to send the uplink signal through the DCI;

[0057] 3) Use the mask of antenna group selection to scramble the cyclic redundancy check (CRC) added after the DCI, so as to implement the function of dynamically indicating the antenna group.

[0058] In addition, the capabilities of the UE in terms of transmit / receive antenna ports include the following:

[0059] t1r1 - t1r2;

[0060] t1r1 - t1r2 - t1r4;

[0061] t1r1 - t1r2 - t2r4;

[0062] t1r1 - t2r2;

[0063] t1r1 - t2r2 - t4r4;

[0064] For example, for t1r1 - t1r2 - t1r4, three parameters t1r1, t1r2, and t1r4 can be configured in the SRS resource set or SRS resource configured by high - layer signaling. At the same time, an aperiodic SRS resource trigger 1, an aperiodic SRS resource trigger 2, and an aperiodic SRS resource trigger 3 are associated with each parameter. Then, when the DCI dynamically triggers the aperiodic SRS, one configuration can be dynamically selected from t1r1, t1r2, and t1r4 for signal transmission.

[0065] In one embodiment, the indication information includes a first time - slot offset parameter, and the first time - slot offset parameter corresponds to the time - slot for transmitting the uplink signal;

[0066] The uplink signal includes an aperiodic SRS.

[0067] In one embodiment, it further includes:

[0068] Configure the first time - slot offset parameter in the SRS resource or SRS resource set configured by high - layer signaling.

[0069] In one embodiment, it further includes:

[0070] In the case of configuring multiple first time - slot offset parameters in the SRS resource or SRS resource set, determine the first time - slot offset parameter according to the SRS request field of the DCI. The multiple first time - slot offset parameters are associated with multiple aperiodic SRS resource trigger parameters or code points.

[0071] In this embodiment, multiple slot offset parameters (SlotOffset) are configured in the SRS resource set, and a corresponding Aperiodic SRS-Resource Trigger is configured for each SlotOffset to enhance the flexibility of aperiodic SRS transmission. For example, the base station configures two SlotOffset parameters, SlotOffset0 and SlotOffset1, for the UE's SRS resource set, and configures the values of the Aperiodic SRS-Resource Trigger corresponding to SlotOffset0 and SlotOffset1 to be 1 and 3 respectively. In this case, the base station can dynamically select a SlotOffset through the SRS request field in the DCI and indicate it to the UE to send an aperiodic SRS. For example, if the value of the SRS request field in the DCI is 01, SlotOffset0 corresponding to the Aperiodic SRS-Resource Trigger with a value of 1 is indicated to the UE; if the value of the SRS request field in the DCI is 11, SlotOffset1 corresponding to the Aperiodic SRS-Resource Trigger with a value of 3 is indicated to the UE, thereby enhancing the flexibility of aperiodic SRS transmission.

[0072] It should be noted that the first, second, etc. in the embodiments of this application are only used to distinguish different situations, but can represent the same parameter or different parameters. For example, in one embodiment, the first slot offset parameter is represented as SlotOffset, and in another embodiment, the second slot offset parameter can also be represented as SlotOffset, and their functions are both used to represent the offset between the slot for transmitting a signal and the slot for triggering the transmission of the signal. Another example is that in one embodiment, the first target slot is represented as n + SlotOffset, and in another embodiment, the second target slot can also be represented as n + SlotOffset, and their functions are both used to represent the slot for transmitting a signal.

[0073] In one embodiment, the indication information includes sub-band parameters, and the sub-band parameters correspond to the sub-bands for transmitting uplink signals;

[0074] The uplink signal includes SRS;

[0075] The indication information is used to instruct the second communication node to repeatedly transmit or frequency-hop transmit SRS on the sub-band.

[0076] In one embodiment, it further includes:

[0077] Receiving the broadband SRS sent by the second communication node;

[0078] The sub - band is determined by measuring the SRS of the wide - band.

[0079] In one embodiment, the SRS of the wide - band is sent by a second communication node on partial physical resource blocks in an activated bandwidth part (BWP).

[0080] In this embodiment, the first communication node instructs the second communication node to send the SRS in two steps to enhance the coverage ability of the SRS and improve the measurement accuracy of the SRS.

[0081] Step1: The second communication node sends the SRS of the wide - band on the activated bandwidth part (Bandwidth Part, BWP), and to enhance the coverage of the SRS, the SRS is only sent on partial physical resource blocks (physical resource block, PRB).

[0082] Step2: The first communication node determines the partial sub - bands that need to be accurately measured by measuring the SRS of the wide - band, and indicates them to the second communication node through signaling. After receiving the signaling indication, the second communication node repeats the transmission or frequency - hops the SRS on the partial sub - bands.

[0083] In one embodiment, the indication information is sent through DCI for uplink scheduling or downlink scheduling;

[0084] The uplink signal includes SRS.

[0085] In one embodiment, the indication information includes configuration parameters of the SRS, and the configuration parameters include at least one of the following: antenna group association parameters corresponding to sending the SRS, time - slot offset association parameters, spatial relationship of beams, frequency - domain position, and cyclic shift of the SRS sequence.

[0086] In this embodiment, the first communication node triggers the sending of the SRS through DCI without PUSCH / PDSCH for uplink or downlink scheduling, and dynamically indicates the configuration parameters of the SRS in the DCI. The configuration parameters of the SRS include at least one of the following: antenna group association parameters corresponding to sending the SRS, time - slot offset association parameters, spatial relationship of beams (the spatial relationship of the beam for sending the SRS can be determined according to the spatial relationship of the beam corresponding to the received SRS, CSI - RS, or Synchronization Signal / Physical Broadcast Channel Block (SSB)), frequency - domain position, and cyclic shift of the SRS sequence.

[0087] For example, the value of the UL-SCH indicator field in DCI format 0_1 can be set to 0, and / or the value or status in the CSI request field can be set to all 0s to trigger an aperiodic SRS using DCI format 0_1. Or from the perspective of the UE, the UE does not expect to receive DCI format 0_1 with the value of the UL-SCH indicator being 0, the CSI request field being all 0s, and the SRS request field being all 0s.

[0088] In one embodiment, in the case of triggering an aperiodic SRS using DCI, the indication information is used to instruct a second communication node to transmit the aperiodic SRS resource set in a first target time slot;

[0089] wherein, the first target time slot is the (k + 1)-th available or valid time slot after the time slot corresponding to the first time slot offset parameter, and k is 0 or a positive integer.

[0090] In one embodiment, in the case of triggering an aperiodic SRS using DCI, the indication information is used to instruct a second communication node to transmit the aperiodic SRS resource set in a first target time slot;

[0091] wherein, the first target time slot is the (k + 1)-th available or valid time slot counted from a reference time slot, or the (k + 1)-th available or valid time slot within N time slots counted from a reference time slot, k is 0 or a positive integer, N is a positive integer within a first preset range or equal to the product of E and (k + 1), E is a positive integer within a second preset range, the reference time slot is the value obtained by rounding down the product of n and a first parameter, n corresponds to the time slot triggering the aperiodic SRS, and the first parameter is the ratio of 2 to the power of μ SRS and 2 to the power of μ PDCCH the ratio, μ SRS is the subcarrier spacing configuration of the triggered SRS; μ PDCCH is the subcarrier spacing configuration of the PDCCH carrying the trigger command;

[0092] The interval between the first symbol of the SRS resource in the first target time slot and the last symbol of the PDCCH triggering the aperiodic SRS is greater than or equal to a preset value.

[0093] In one embodiment, the k is determined by at least one of the following methods:

[0094] Configured by radio resource control (RRC) signaling;

[0095] Equal to the first time slot offset parameter;

[0096] Configured by RRC signaling and the k corresponds to an SRS trigger state or an antenna group association parameter;

[0097] The k corresponds to a control resource set;

[0098] The k corresponds to the time slot where the PDCCH triggering the SRS is located;

[0099] The k is a predetermined value.

[0100] In one embodiment, when using DCI to trigger an aperiodic SRS, the indication information is used to instruct the second communication node to send an aperiodic SRS in a second target time slot;

[0101] Wherein, the second target time slot is the first valid time slot in the SRS resource or the time slots configured in the SRS resource set of the second communication node, or is the time slot with the smallest time slot offset from the time slot where the PDCCH triggering the aperiodic SRS is located among the corresponding valid time slots in the SRS resource or the SRS resource set of the second communication node.

[0102] In one embodiment, when using DCI to trigger an aperiodic SRS, or when at least one SRS resource in the SRS resource or SRS resource set configured in the time slot corresponding to the first time slot offset parameter or the time slot where the PDCCH triggering the aperiodic SRS is located is on at least one downlink symbol, the indication information is used to instruct the second communication node to send an aperiodic SRS in a third target time slot;

[0103] Wherein, the third target time slot is the first valid time slot among the N time slots after the time slot where the PDCCH triggering the aperiodic SRS is located, or is the first valid time slot among the N time slots after the time slot corresponding to the first time slot offset parameter, and N is a positive integer within a first preset range.

[0104] In one embodiment, when the indication information is used to instruct the second communication node to send an uplink signal and the indication information does not include a first time slot offset parameter, the indication information is used to instruct the second communication node to send an aperiodic SRS in a third target time slot;

[0105] Wherein, the third target time slot is the first valid time slot among the N time slots after the time slot where the PDCCH triggering the aperiodic SRS is located, or is the first valid time slot among the N time slots after the time slot corresponding to the first time slot offset parameter, and N is a positive integer within a first preset range.

[0106] In one embodiment, when there is no valid time slot among the N time slots, the indication information is used to instruct the second communication node to send an aperiodic SRS on a part of the symbols in the time slot corresponding to the first time slot offset parameter or in the last time slot among the N time slots.

[0107] In one embodiment, the valid time slot includes at least one of the following:

[0108] An available or valid uplink time slot, special time slot, or flexible time slot;

[0109] An uplink time slot, special time slot, or flexible time slot for transmitting at least one SRS resource in an SRS resource set;

[0110] An uplink time slot, special time slot, or flexible time slot for transmitting all SRS resources in an SRS resource set;

[0111] An uplink time slot, special time slot, or flexible time slot for transmitting at least one SRS resource in an SRS resource set without conflicting with the transmission of other uplink signals;

[0112] A time slot in which there are available uplink symbols for transmitting all SRS resources in an SRS resource set and that meets the minimum time requirement between the PDCCH triggering the aperiodic SRS and all SRS transmissions in the resource set.

[0113] In this embodiment, the first communication node may be a base station, and the second communication node may be a UE. The base station may configure an SRS resource set for the UE through Radio Resource Control (RRC) signaling, and the SRS resource set contains the SlotOffset of the time slot for transmitting the aperiodic SRS. However, DCI format 2-0 can dynamically modify the time slot format, dynamically modifying the time slot for transmitting the aperiodic SRS determined by the SlotOffset to a downlink time slot. In this case, the SlotOffset parameter will no longer be applicable, resulting in the inability to determine the time slot for transmitting the aperiodic SRS. Figure 2 For a schematic diagram of the modification of the time slot offset parameter for signal transmission in one embodiment, as Figure 2 shown, time slot n is the time slot where the PDCCH triggering the SRS is located, and the time slot for transmitting the aperiodic SRS determined by the SlotOffset is time slot n + SlotOffset ( Figure 2 taking n = 2 as an example in ). If time slot n + SlotOffset is a valid time slot, the aperiodic SRS resource set is transmitted in time slot n + SlotOffset; but in the case where DCI format 2-0 modifies time slot n + SlotOffset to a downlink time slot, the time slot for transmitting the aperiodic SRS cannot be determined. To solve the above problems, the solutions include at least one of the following:

[0114] Solution 1: If the time slot n + SlotOffset is not a valid time slot, the predefined UE sends an aperiodic SRS resource set in the (k + 1)-th valid time slot after time slot n or time slot n + SlotOffset, where k can take a value of 0 or a positive integer, and the determination method of k includes at least one of the following:

[0115] 1) Configured by the base station for the UE through RRC signaling;

[0116] 2) Equal to SlotOffset;

[0117] 3) The base station configures multiple k values for the UE through RRC signaling, and these multiple k values respectively correspond to multiple SRS trigger states or Aperiodic SRS-Resource Trigger;

[0118] 4) Associated with a Control Resource Set (CORESET);

[0119] 5) Associated with the time slot where the PDCCH triggering the SRS is located;

[0120] 6) A predefined value, such as 0, or other predefined values.

[0121] Solution 2: The predefined UE sends an aperiodic SRS resource set in the (k + 1)-th valid time slot after time slot n. The interval between the first symbol of the SRS resource in the (k + 1)-th time slot and the last symbol of the PDCCH triggering the aperiodic SRS is greater than or equal to N2, or greater than or equal to N2 + 14, where N2 is obtained according to the existing Rel-15 NR protocol and is a value determined based on the processing capability of the UE and the subcarrier spacing. Or the predefined UE sends an aperiodic SRS resource set in the (k + 1)-th valid time slot after time slot n. The interval between the first symbol of the SRS resource in the (k + 1)-th valid time slot and the last symbol of the PDCCH triggering the aperiodic SRS is greater than or equal to a predefined value A, where at least one of the following is included in the acquisition parameters of the predefined value A: the minimum value of the PDCCH scheduling the uplink channel and / or signal and the uplink channel and / or signal, the subcarrier spacing relationship between the PDCCH and the SRS. For example, when the subcarrier spacing of the PDCCH and the SRS is the same, the predefined value A is a first value, and when the subcarrier spacing of the PDCCH and the SRS is different, the predefined value A is a second value, where the first value is less than or equal to the second value. For example, the predefined value A is N2, or greater than or equal to N2 + 14, or the predefined value A is T proc,2 = max((N2 + d 2,1 )(2048 + 144)·κ2 -μ ·TC , d 2,2 ), where N2 is obtained according to the subcarrier spacing of the SRS, and different subcarrier spacings correspond to different N2 values. The correspondence between the subcarrier spacing and the N2 value is agreed upon by the base station and the terminal, and d 2,1 is 0 or 1. When the PDCCH triggers BWP switching, d2,2 is the BWP switching time, otherwise it is 0, κ is 64, and T C is the time unit. For example, T C = 1 / (480 * 10 3 * 4096) seconds. Among them, k can take a value of 0 or a positive integer. The determination method of k includes at least one of the following:

[0122] 1) Configured by the base station for the UE through RRC signaling;

[0123] 2) Equal to SlotOffset;

[0124] 3) The base station configures multiple k values for the UE through RRC signaling, and these multiple k values respectively correspond to multiple SRS trigger states or Aperiodic SRS-Resource Trigger;

[0125] 4) Associated with the CORESET;

[0126] 5) Associated with the time slot where the PDCCH triggering the SRS is located;

[0127] 6) A preset value, such as 0, or other preset values.

[0128] Solution 3: The SRS resource set configured by the base station for the UE contains multiple SlotOffsets, such as SlotOffset1, SlotOffset 2, SlotOffset 3, SlotOffset 4. Then the UE sequentially searches for valid time slots in time slots n+SlotOffset1, n+SlotOffset 2, n+SlotOffset 3, n+SlotOffset 4, and sends the SRS resource set in the first valid time slot. For example, first determine whether time slot n+SlotOffset1 is a valid time slot. If n+SlotOffset 1 is an invalid time slot, then determine whether n+SlotOffset 2 is a valid time slot. If n+SlotOffset2 is a valid time slot, the UE sends the SRS resource set in time slot n+SlotOffset 2. Alternatively, the UE first determines the valid time slots among time slots n+SlotOffset 1, n+SlotOffset 2, n+SlotOffset 3, n+SlotOffset 4. For example, if time slots n+SlotOffset 2 and n+SlotOffset 3 are determined to be valid time slots, the UE sends the SRS resource set in the time slot of min(n+SlotOffset2,n+SlotOffset 3).

[0129] Solution 4: If at least one SRS resource in the triggered aperiodic SRS resource set is set on at least one downlink symbol for the configured SlotOffset or the triggered offset, the SRS resource set is sent in the first valid time slot within N time slots after time slot (n+SlotOffset) or after time slot n, where N is a predefined integer between 1 and 50.

[0130] Solution 5: If no valid time slot is found within N time slots after time slot n or time slot (n+SlotOffset), the UE sends some SRS resources in the SRS resource set on some symbols in time slot (n+SlotOffset) or time slot (n+SlotOffset+N), where N is a predefined integer between 1 and 50.

[0131] It should be noted that, in addition to the above solutions, in the case where the first communication node instructs the second communication node to send SRS but the SlotOffset parameter is not configured in the SRS resource set, the methods of Solution 4 and Solution 5 can also be adopted, that is, the SRS resource set is sent in the first valid time slot after time slot (n + SlotOffset) or in the N time slots after time slot n. And if no valid time slot is found in the N time slots after time slot (n + SlotOffset), the UE sends some SRS resources in the SRS resource set on some symbols in time slot (n + SlotOffset) or time slot (n + SlotOffset + N), where N is a predefined integer between 1 and 50.

[0132] In the above solutions, the valid time slot includes at least one of the following:

[0133] 1) An available or valid uplink time slot / special time slot / flexible time slot. The special time slot refers to a hybrid time slot that can be used for both sending uplink signals and sending downlink signals. For example, the transmission directions of the time domain symbols where the at least one SRS resource is located are not all downlink. In the valid time slot, the transmission direction of the time domain symbol where the SRS is located can be uplink, or a flexible symbol, such as a flexible time domain symbol. The transmission direction is obtained through the time slot structure information;

[0134] 2) An uplink time slot / special time slot available for at least one SRS resource in the SRS resource set;

[0135] 3) An uplink time slot / special time slot available for all SRS resources in the SRS resource set;

[0136] 4) An uplink time slot / special time slot where the transmission of at least one SRS resource in the SRS resource set does not conflict with other uplink signals. Other signals can refer to uplink signals, such as periodic SRS, other aperiodic SRS, PUSCH, PUCCH, etc.;

[0137] 5) A time slot available for all SRS resources in the SRS resource set and meeting the minimum time requirement between PDCCH and SRS transmission;

[0138] 6) The time interval between the PDCCH and the starting time domain symbol of the SRS resource in the valid time slot is greater than or equal to the predetermined value A;

[0139] 7) The time interval between the PDCCH and the starting time domain symbol of the SRS resource set in the valid time slot is greater than or equal to the predetermined value A;

[0140] 8) The valid time unit is within the predetermined time window after the PDCCH;

[0141] 9) Between the PDCCH and the valid time slot, the time structure information does not change;

[0142] 10) The time interval between the PDCCH closest to the valid time unit before and the starting symbol of the measurement reference signal resource in the valid time slot is greater than or equal to the first predetermined time interval;

[0143] 11) Within the predetermined time window after the PDCCH, the time structure information does not change;

[0144] 12) Between the PDCCH and the valid time slot, it is based on the same time slot structure information;

[0145] 13) Within the predetermined time window after the PDCCH, it is based on the same time slot structure information;

[0146] 14) In the time slot, the transmission directions of the time domain symbols occupied by all SRS resources in the SRS resource set are not downlink, for example, they can be uplink or flexible time domain symbols or special time domain symbols, where the transmission direction is obtained through the time slot structure information. That is, find the valid time slot at the SRS resource set level;

[0147] 15) In the time slot, the transmission direction of the time domain symbol occupied by the SRS resource is not downlink, for example, it can be uplink or flexible time domain symbols or special time domain symbols, where the transmission direction is obtained through the time slot structure information. That is, find the valid time slot at the SRS resource level.

[0148] Whether to find the valid time slot based on the CSI-RS resource set level or the CSI-RS resource level, optionally, it can be determined according to the configuration information in the CSI-RS resource set. For example, when the configuration in the SRS set is beam management, find the valid time slot according to the CSI-RS resource set level, otherwise find the valid time slot independently based on each CSI-RS resource.

[0149] The above PDCCH is the PDCCH for scheduling the SRS.

[0150] 16) All SRS resources in the SRS resource set send uplink time slots / special time slots that do not conflict with other signals.

[0151] For example, if the UE receives DCI triggering an aperiodic SRS in time slot n, then from The aperiodic SRS resource set is transmitted in the (k + 1)-th valid time slot within the first 10(k + 1) time slots starting from counting, where k is the value configured by the higher layer parameter SlotOffset, and μ SRS is the subcarrier spacing configuration of the triggered SRS, and μ PDCCH is the subcarrier spacing configuration of the PDCCH carrying the trigger command. A time slot that contains available uplink symbols for transmitting all SRS resources in the SRS resource set and meets the minimum time requirement between the PDCCH triggering the aperiodic SRS and the transmission of all SRS resources in the resource set is a valid time slot. In the case of conflicts among multiple triggered SRS resources, only the aperiodic SRS resources triggered by the latest DCI are transmitted.

[0152] In one embodiment, the indication information includes a second time slot offset parameter corresponding to the time slot for receiving the downlink signal;

[0153] The downlink signal includes a channel state information reference signal CSI-RS;

[0154] The indication information is used to indicate that the second communication node receives the aperiodic CSI-RS.

[0155] In one embodiment, it further includes:

[0156] The second time slot offset parameter is configured in the CSI-RS resources or CSI-RS resource set configured by the higher layer signaling.

[0157] In one embodiment, for the aperiodic CSI-RS resource set triggered by DCI, the indication information is used to indicate that the first communication node transmits the aperiodic CSI-RS resource set in the fourth target time slot, where the fourth target time slot is the (h + 1)-th available or valid time slot starting from the time slot where the aperiodic CSI-RS resource set is triggered, or is the (h + 1)-th available or valid time slot within M time slots starting from the time slot where the aperiodic CSI-RS resource set is triggered. h is 0 or a positive integer, N is a positive integer within the first preset range or equal to the product of F and (k + 1), and F is a positive integer within the second preset range.

[0158] In one embodiment, the h is determined by at least one of the following methods:

[0159] Configured by RRC signaling;

[0160] Equal to the second time slot offset parameter;

[0161] Configured by RRC signaling and the h corresponds to a CSI-RS trigger state;

[0162] The h corresponds to a control resource set;

[0163] The h corresponds to the time slot in which the PDCCH triggering the CSI-RS is located;

[0164] The h is a predetermined value.

[0165] In one embodiment, for a DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that the first communication node sends an aperiodic CSI-RS in a fifth target time slot, where the fifth target time slot is the first valid time slot among the time slots configured in the CSI-RS resource set of the second communication node; or is the time slot with the smallest time slot offset among the valid time slots configured in the CSI-RS resource set of the second communication node.

[0166] In one embodiment, for a DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that the first communication node sends an aperiodic CSI-RS in a fifth target time slot, where the fifth target time slot is the first valid time slot among the M time slots after the time slot in which the PDCCH triggering the aperiodic CSI-RS is located, or is the first valid time slot among the M time slots after the time slot corresponding to the second time slot offset parameter, and M is a positive integer within a second preset range.

[0167] In one embodiment, when the indication information is used to indicate that the second communication node receives a downlink signal and the indication information does not include a second time slot offset parameter, the indication information indicates that the first communication node sends an aperiodic CSI-RS resource set in a fifth target time slot;

[0168] where the fifth target time slot is the first valid time slot among the M time slots after the time slot in which the PDCCH triggering the aperiodic CSI-RS is located, or is the first valid time slot among the M time slots after the time slot corresponding to the first time slot offset parameter, and M is a positive integer within a second preset range.

[0169] In one embodiment, when there is no valid time slot among the M time slots, the indication information is used to indicate that the first communication node sends an aperiodic CSI-RS on a part of the symbols in the time slot corresponding to the second time slot offset parameter or in the last time slot among the M time slots.

[0170] In one embodiment, the valid time slot includes at least one of the following:

[0171] An available or valid downlink time slot or special time slot or flexible time slot;

[0172] An uplink time slot or special time slot or flexible time slot used to send a CSI-RS resource or at least one CSI-RS resource in a CSI-RS resource set;

[0173] An uplink time slot, special time slot, or flexible time slot for transmitting all CSI-RS resources in a CSI-RS resource or a CSI-RS resource set;

[0174] An uplink time slot, special time slot, or flexible time slot for transmitting at least one CSI-RS resource in a CSI-RS resource or a CSI-RS resource set and not conflicting with the transmission of other uplink signals;

[0175] A time slot that contains available downlink symbols for transmitting all CSI-RS resources in a CSI-RS resource or a CSI-RS resource set and meets the minimum time requirement between the PDCCH triggering the aperiodic CSI-RS and the transmission of all CSI-RS resources in the resource set.

[0176] In this embodiment, the first communication node may be a base station, and the second communication node may be a UE. The base station may configure an SRS resource set for the UE through Radio Resource Control (RRC) signaling, and the SRS resource set contains a time slot offset parameter aperiodicTriggeringOffset for transmitting aperiodic CSI-RS. Assume that the time slot where the PDCCH triggering the aperiodic CSI-RS is located is n. However, DCI format 2-0 can dynamically modify the time slot format, and the time slot for transmitting the aperiodic CSI-RS determined by aperiodicTriggeringOffset (i.e., time slot n + aperiodicTriggeringOffset) is dynamically modified to an uplink time slot. In this case, the aperiodicTriggeringOffset parameter will no longer be applicable, resulting in the inability to determine the time slot for transmitting the aperiodic CSI-RS. To solve the above problems, the solutions include at least one of the following:

[0177] Solution 1: If time slot n + aperiodicTriggeringOffset is not a valid time slot, predefine that the UE transmits the aperiodic CSI-RS resource set in the h + 1-th valid time slot after time slot n or time slot n + aperiodicTriggeringOffset, where the value of h can be 0 or a positive integer, and the determination method of h includes at least one of the following:

[0178] 1) Configured by the base station for the UE through RRC signaling;

[0179] 2) Equal to aperiodicTriggeringOffset;

[0180] 3) The base station configures multiple h values for the UE through RRC signaling, and these multiple h values respectively correspond to multiple CSI-RS trigger states;

[0181] 4) Associated with the CORESET;

[0182] 5) Associated with the time slot where the physical downlink control channel (PDCCH) that triggers the CSI-RS is located;

[0183] 6) Is a predefined value, such as 0, or other predefined values.

[0184] Solution 2: Predefine that the base station sends the aperiodic CSI-RS resource set in the (h + 1)-th valid time slot after time slot n. Among them, the value of h can be 0 or a positive integer, and the determination method of h includes at least one of the following:

[0185] 1) Configured by the base station for the UE through RRC signaling;

[0186] 2) Equal to aperiodicTriggeringOffset;

[0187] 3) The base station configures multiple h values for the UE through RRC signaling, and these multiple h values respectively correspond to multiple CSI-RS trigger states;

[0188] 4) Associated with the CORESET;

[0189] 5) Associated with the time slot where the physical downlink control channel (PDCCH) that triggers the CSI-RS is located;

[0190] 6) Is a predefined value, such as 0, or other predefined values.

[0191] Solution 3: The CSI-RS resource set configured by the base station for the UE contains multiple aperiodicTriggeringOffsets, such as aperiodicTriggeringOffset 1, aperiodicTriggeringOffset 2, aperiodicTriggeringOffset 3, aperiodicTriggeringOffset 4. Then the base station sequentially searches for valid time slots in time slots n + aperiodicTriggeringOffset 1, time slot n + aperiodicTriggeringOffset 2, time slot n + aperiodicTriggeringOffset 3, and time slot n + aperiodicTriggeringOffset 4, and sends the CSI-RS resource set in the first valid time slot. For example, first determine whether time slot n + aperiodicTriggeringOffset 1 is a valid time slot. If n + aperiodicTriggeringOffset 1 is an invalid time slot, then determine whether n + aperiodicTriggeringOffset 2 is a valid time slot. If n + aperiodicTriggeringOffset 2 is a valid time slot, the UE sends the SRS resource set in time slot n + aperiodicTriggeringOffset 2, and so on. Alternatively, the base station first determines the valid time slots in time slots n + aperiodicTriggeringOffset 1, time slot n + aperiodicTriggeringOffset 2, time slot n + aperiodicTriggeringOffset 3, and time slot n + aperiodicTriggeringOffset 4. For example, if it is determined that time slots n + aperiodicTriggeringOffset 2 and n + aperiodicTriggeringOffset 3 are valid time slots, the UE sends the CSI-RS resource set in the time slot of min(n + aperiodicTriggeringOffset 2, n + aperiodicTriggeringOffset 3).

[0192] Solution 4: If the configured aperiodicTriggeringOffset or the triggered offset sets at least one CSI-RS resource in the triggered aperiodic CSI-RS resource set on at least one uplink symbol, the CSI-RS resource set is transmitted in the first valid time slot within M time slots after time slot (n + aperiodicTriggeringOffset) or after time slot n. Here, M is a certain integer predefined between 1 and 50.

[0193] Solution 5: If no valid time slot is found within M time slots after time slot (n + aperiodicTriggeringOffset), the base station transmits some CSI-RS resources in the CSI-RS resource set on some symbols in time slot (n + aperiodicTriggeringOffset) or time slot (n + aperiodicTriggeringOffset + N). Here, M is a certain integer predefined between 1 and 50.

[0194] It should be noted that in addition to the above solutions, in the case where the first communication node instructs the second communication node to transmit CSI-RS but the aperiodicTriggeringOffset parameter is not configured in the CSI-RS resource set, the methods of Solutions 4 and 5 can also be adopted, that is, the CSI-RS resource set is transmitted in the first valid time slot within M time slots after time slot (n + aperiodicTriggeringOffset) or after time slot n, and if no valid time slot is found within M time slots after time slot (n + aperiodicTriggeringOffset), the UE transmits some SRS resources in the SRS resource set on some symbols in time slot (n + aperiodicTriggeringOffset) or time slot (n + aperiodicTriggeringOffset + N), where M is a certain integer predefined between 1 and 50.

[0195] In the above solutions, the valid time slot includes at least one of the following:

[0196] 1) An available or valid downlink time slot / special time slot;

[0197] 2) A downlink time slot / special time slot available for transmission of at least one CSI-RS resource in the CSI-RS resource set;

[0198] 3) A downlink time slot / special time slot available for transmission of at least one CSI-RS resource in the CSI-RS resource set;

[0199] 4) Transmit at least one CSI-RS resource in the CSI-RS resource set in a downlink time slot / special time slot that does not conflict with other downlink signals;

[0200] 5) A time slot available for transmitting all CSI-RS resources in the CSI-RS resource set and meeting the minimum time requirement between PDCCH and CSI-RS transmission;

[0201] 6) In the time slot, the transmission direction of the time domain symbols occupied by all CSI-RS resources in the CSI-RS resource set is not uplink. For example, it can be downlink or flexible time domain symbols or special time domain symbols, where the transmission direction is obtained through the time slot structure information. That is, find an effective time slot at the CSI-RS resource set level.

[0202] 7) In the time slot, the transmission direction of the time domain symbols occupied by the CSI-RS resources is not uplink. For example, it can be downlink or flexible time domain symbols or special time domain symbols, where the transmission direction is obtained through the time slot structure information. That is, find an effective time slot at the CSI-RS resource level.

[0203] Whether to find an effective time slot at the CSI-RS resource set level or the CSI-RS resource level. Optionally, it can be determined according to the configuration information in the CSI-RS resource set. For example, when on / off is configured, find an effective time slot at the CSI-RS resource set level; otherwise, find an effective time slot independently based on each CSI-RS resource.

[0204] The interval between the PDCCH and the starting time domain symbol of the CSI-RS resource set in the time slot is greater than a second predetermined value, where the second predetermined value is beamSwitchTiming, and beamSwitchTiming represents the minimum time interval for applying the transmission configuration indication (TCI) indicated by the PDCCH to CSI-RS reception, or the minimum time interval between the PDCCH and the CSI-RS.

[0205] 8) The effective time slot is within the predetermined time window after the PDCCH;

[0206] 9) Between the PDCCH and the effective time slot, the time structure information does not change;

[0207] 10) The time interval between the PDCCH closest to the effective time slot that includes the time slot structure information and the starting symbol of the measurement reference signal resource in the effective time slot is greater than or equal to the first predetermined time interval;

[0208] 11) Within the predetermined time window after the PDCCH, the time structure information does not change;

[0209] 12) Between the PDCCH and the valid time slot, the same time slot structure information is followed;

[0210] 13) Within the predetermined time window after the PDCCH, the same time slot structure information is followed.

[0211] The above PDCCH is the PDCCH that schedules the CSI-RS.

[0212] For example, for an aperiodic CSI-RS resource set triggered by DCI in time slot n, the first communication node transmits the aperiodic CSI-RS resource set in the (k + 1)-th valid time slot within 10(k + 1) time slots starting from time slot n, where k is the value configured by the higher layer parameter aperiodicTriggeringOffset. A time slot that contains available downlink symbols for transmitting all CSI-RS resources in the CSI-RS resource set and meets the minimum time requirement between the PDCCH that triggers the aperiodic CSI-RS and the transmission of all CSI-RS resources in the resource set is a valid time slot. In the case where multiple triggered CSI-RS resources conflict, only the most recently (latest) DCI-triggered aperiodic CSI-RS resource is transmitted.

[0213] In one embodiment, it further includes:

[0214] In the case where at least one resource in the triggered aperiodic SRS or aperiodic CSI-RS resource set conflicts with other signals to be transmitted, the symbols in the resource set that conflict are removed, or the transmission of the aperiodic SRS or aperiodic CSI-RS is postponed, or the other signals to be transmitted that conflict are removed, and the aperiodic SRS or aperiodic CSI-RS is preferentially transmitted.

[0215] In one embodiment, the indication information is further used to indicate:

[0216] In the case where the transmission of at least two aperiodic SRSs or aperiodic CSI-RSs is triggered by the same DCI or different DCIs, or in the case where multiple SRS resources or SRS resource sets or multiple CSI-RS resources or CSI-RS resource sets conflict with each other, only the most recently DCI-triggered aperiodic SRS resource or SRS resource set or aperiodic CSI-RS resource or resource set is transmitted, or only the aperiodic SRS resource or SRS resource set or aperiodic CSI-RS resource or resource set with the smallest or largest resource set identifier is transmitted.

[0217] In this embodiment, if one or more resources in the triggered SRS resource set (CSI-RS resource set) conflict with other uplink signals (downlink signals), the conflicting resources or symbols are discarded, or the transmission of the entire SRS resource set (CSI-RS resource set) is postponed; alternatively, the conflicting other uplink signals (downlink signals) are discarded and the SRS resource set (CSI-RS resource set) is preferentially transmitted.

[0218] If the base station triggers the simultaneous transmission of multiple SRS resource sets (CSI-RS resource sets) through the same DCI or different DCIs, only the SRS resource set (CSI-RS resource set) triggered by the most recent DCI is transmitted, or only the SRS resource set (CSI-RS resource set) with a smaller or larger resource set identifier (ID) is transmitted.

[0219] In one embodiment, the indication information includes a third time slot offset parameter, and the third time slot offset parameter corresponds to the time slot for transmitting the downlink signal;

[0220] The downlink signal includes PDSCH;

[0221] The indication information is used to instruct the second communication node to receive the PDSCH.

[0222] In one embodiment, it further includes:

[0223] At least one information element is configured through RRC signaling, and the at least one information element is used to configure the time domain relationship between the PDCCH and the PDSCH, and the at least one information element respectively corresponds to at least one time slot offset parameter;

[0224] In the case where there are at least two information elements, the time slot offset parameter corresponding to one information element is determined as the third time slot offset parameter through DCI signaling.

[0225] In one embodiment, in the case where DCI triggers the transmission of PDSCH, the indication information is used to instruct the second communication node to receive the PDSCH in the sixth target time slot, where the sixth target time slot is the time slot where the PDCCH is located or the r+1th available or valid downlink time slot or special time slot after the time slot corresponding to the sixth time slot offset parameter, and r is 0 or a positive integer.

[0226] In one embodiment, the r is determined by at least one of the following methods:

[0227] Configured through RRC signaling;

[0228] Equal to the third time slot offset parameter;

[0229] Configured through RRC signaling and the r corresponds to a CSI-RS trigger state;

[0230] The r corresponds to a control resource set;

[0231] The r corresponds to the time slot where the PDCCH scheduling the PDSCH is located;

[0232] The r is a predetermined value.

[0233] In this embodiment, the first communication node may be a base station, and the second communication node may be a UE. For the transmission of PDSCH, according to the current transmission mechanism of Rel-15 NR, the base station configures one or more information elements (IEs) PDSCH-TimeDomainResourceAllocation for the UE through RRC signaling, which is used to configure the time-domain relationship between the PDCCH and the PDSCH. The information element PDSCH-TimeDomainResourceAllocation includes the parameter k0, and k0 represents the offset between the time slot where the PDSCH is located and the time slot where the PDCCH scheduling this PDSCH is located. In the case where the RRC signaling configures multiple information elements PDSCH-TimeDomainResourceAllocation, one can be dynamically selected from the multiple information elements through DCI signaling, so as to determine k0, and further determine the time slot for transmitting the PDSCH. However, DCI format 2-0 can dynamically modify the time slot format. When the time slot for transmitting the PDSCH determined by the parameter k0 is dynamically modified to an uplink time slot, the base station will not be able to transmit the PDSCH scheduled by the PDCCH at this time. Moreover, due to the limited number of bits indicating k0 in the DCI, the RRC signaling can only configure a limited number of k0 values for the base station to dynamically select, which brings limitations to the base station resource scheduling. To solve the above problems, when encountering the above situation, it can be predefined that the base station transmits the PDSCH in the k0th available or valid downlink time slot / special time slot after the time slot where the PDCCH is located, or it can be predefined that the base station transmits the PDSCH in the (r + 1)th available or valid downlink time slot / special time slot after the time slot determined by the parameter k0, where the value of r can be 0 or a positive integer, and the determination method of r includes at least one of the following:

[0234] 1) Configured by the base station for the UE through RRC signaling;

[0235] 2) The base station configures multiple r values for the UE through RRC signaling, and these multiple r values respectively correspond to multiple trigger states of CSI-RS;

[0236] 3) Associated with the CORESET;

[0237] 4) Associated with the time slot in which the PDCCH scheduling the PDSCH is located.

[0238] In the effective time slot, the transmission direction of the time domain symbol occupied by the PDSCH is not the uplink. The transmission direction is determined by the time slot structure information.

[0239] In one embodiment, the indication information includes a fourth time slot offset parameter corresponding to the time slot for transmitting the uplink signal;

[0240] The uplink signal includes PUSCH;

[0241] The indication information is used to instruct the second communication node to transmit the PUSCH.

[0242] In one embodiment, it further includes:

[0243] Configuring at least one information element through RRC signaling, where the at least one information element is used to configure the time domain relationship between the PDCCH and the PUSCH, and the at least one information element corresponds to at least one time slot offset parameter respectively;

[0244] When there are at least two information elements, determining, through DCI signaling, the time slot offset parameter corresponding to one information element as the fourth time slot offset parameter.

[0245] In one embodiment, when the PUSCH transmission is triggered by DCI, the indication information is used to instruct the second communication node to transmit the PUSCH in the seventh target time slot, where the seventh target time slot is the time slot in which the PDCCH is located or the (y + 1)-th available or effective downlink time slot or special time slot after the time slot corresponding to the fourth time slot offset association parameter, and y is 0 or a positive integer.

[0246] In one embodiment, the y is determined by at least one of the following methods:

[0247] Configured through RRC signaling;

[0248] Equal to the fourth time slot offset parameter;

[0249] Configured through RRC signaling and the y corresponds to a CSI-RS trigger state;

[0250] The y corresponds to a control resource set;

[0251] The y corresponds to the time slot in which the PDCCH scheduling the PDSCH is located.

[0252] In this embodiment, for the transmission of PUSCH, according to the current transmission mechanism of Rel-15 NR, the base station configures one or more information elements (IEs) PUSCH-TimeDomainResourceAllocation for the UE through RRC signaling, which is used to configure the time-domain relationship between the PDCCH and the PUSCH. The information element PUSCH-TimeDomainResourceAllocation includes the parameter k2, and k2 represents the offset between the time slot where the PUSCH is located and the time slot where the PDCCH scheduling this PUSCH is located. When the RRC signaling configures multiple information elements PUSCH-TimeDomainResourceAllocation, one can be dynamically selected from the multiple information elements through DCI signaling, so as to determine k2, and then determine the time slot for transmitting the PUSCH. However, DCI format 2-0 can dynamically modify the time slot format. When the time slot for transmitting the PUSCH determined by the parameter k2 is dynamically modified to a downlink time slot, the UE will not be able to transmit the PUSCH scheduled by the PDCCH at this time. Moreover, due to the limited number of bits indicating k2 in the DCI, the RRC signaling can only configure a limited number of k2 values for the base station to dynamically select, which brings restrictions to the base station resource scheduling. To solve the above problems, when encountering the above situation, it can be predefined that the UE transmits the PUSCH in the k2th available or valid uplink time slot / special time slot after the predetermined time A of the PDCCH time slot, or it can be predefined that the UE transmits the PUSCH in the (y + 1)th available or valid uplink time slot / special time slot after the time slot determined by the parameter k2, where the value of y can be 0 or a positive integer, and the determination method of y includes at least one of the following:

[0253] 1) Configured by the base station for the UE through RRC signaling;

[0254] 2) The base station configures multiple y values for the UE through RRC signaling, and these multiple y values respectively correspond to multiple trigger states of CSI-RS;

[0255] 3) Associated with the CORESET;

[0256] 4) Associated with the time slot where the PDCCH scheduling the PUSCH is located.

[0257] Among them, the transmission direction of the time-domain symbol occupied by the PUSCH in the valid time slot is not downlink. The transmission direction is determined by the time slot structure information.

[0258] In one embodiment, the indication information includes a fifth time slot offset parameter, and the fifth time slot offset parameter corresponds to the time slot for transmitting the uplink signal;

[0259] The uplink signal includes a PUCCH associated with acknowledgment and non-acknowledgment information;

[0260] The indication information is used to instruct the second communication node to transmit the PUCCH associated with the acknowledgment and non-acknowledgment information.

[0261] In one embodiment, it further includes:

[0262] Configuring at least one preset parameter through RRC signaling, where the preset parameter is used to configure the time domain relationship between the PDSCH and the PUCCH.

[0263] In one embodiment, the indication information is used to instruct the second communication node to transmit the PUCCH in the eighth target time slot, where the eighth target time slot is the time slot where the PDSCH is located or the (x + 1)-th available or valid downlink time slot or special time slot after the time slot corresponding to the fifth time slot offset association parameter, and x is 0 or a positive integer.

[0264] In one embodiment, the x is determined by at least one of the following methods:

[0265] Configured through RRC signaling;

[0266] Equal to the fifth time slot offset parameter;

[0267] Configured through RRC signaling and the x corresponds to a CSI-RS triggering state;

[0268] The x corresponds to a control resource set;

[0269] The x corresponds to the time slot where the PDCCH scheduling the PDSCH is located.

[0270] In this embodiment, for the transmission of the Physical Uplink Control Channel (PUCCH) with ACK / NACK, according to the current transmission mechanism of Rel-15 NR, the base station configures the parameter k1 for the UE through signaling, which is used to represent the slot offset relationship between the PDSCH and the PUCCH with ACK / NACK. However, the DCI format 2-0 can dynamically modify the slot format. When the slot for transmitting the PUCCH determined by the parameter k1 is dynamically modified to a downlink slot, the UE will not be able to transmit the PUCCH at this time. Moreover, due to the limited number of bits indicating k1 in the DCI, the RRC signaling can only configure a limited number of k1 values for the base station to dynamically select, which brings limitations to the base station resource scheduling. To solve the above problems, when encountering the above situation, it can be predefined that the UE transmits the PUCCH in the k1-th available or valid uplink slot / special slot after the PDSCH slot, or it can be predefined that the UE transmits the PUCCH in the (x + 1)-th available or valid uplink slot / special slot after the slot determined by the parameter k1, where the value of x can be 0 or a positive integer, and the determination method of x includes at least one of the following:

[0271] 1) Configured by the base station for the UE through RRC signaling;

[0272] 2) The base station configures multiple x values for the UE through RRC signaling, and these multiple x values respectively correspond to multiple trigger states of CSI-RS;

[0273] 3) Associated with the control resource set CORESET;

[0274] 4) Associated with the slot where the PDSCH is located, where the transmission direction of the time-domain symbol occupied by the PUCCH in the valid slot is not downlink. The transmission direction is determined by the slot structure information.

[0275] In the above embodiments, the slot structure information includes at least one of the following: according to the time domain symbol position where the synchronization signal is located; according to the semi-static frame structure; according to DCI format 2_0; according to the time domain symbol where the PRACH is located; the slot structure information before the PDCCH; the slot structure information in each time unit after the PDCCH includes the valid slot structure information in each time unit; when determining the transmission direction of a time domain symbol, the slot structure information has a higher priority than the slot structure information of the target signal. For example, if the transmission direction of a time domain symbol is determined to be uplink through the slot structure information, but the target signal is the above-mentioned aperiodic CSI-RS / PDSCH, the priority of the slot structure information is higher, that is, the transmission direction of this time domain symbol is uplink. Generally, when determining the transmission direction of a time domain symbol, the PDSCH / PUSCH / AP-SRS / AP-CSI-RS scheduled by DCI has a higher priority than the periodic signal. The transmission direction of a time domain symbol includes: uplink, downlink, flexible. The transmission direction of flexible can be changed to uplink or downlink by the target signal.

[0276] In the above embodiments, the slot structure information satisfies at least one of the following characteristics:

[0277] 1) When determining the transmission direction of a time domain symbol, the priority of the slot structure information is higher than that of the slot structure information of the target signal;

[0278] 2) Between the PDCCH and the valid slot, the time structure information does not change;

[0279] 3) The time interval between the PDCCH including the slot structure information closest to the valid time unit before the valid time unit and the start symbol of the measurement reference signal resource in the valid slot is greater than or equal to the first predetermined time interval;

[0280] 4) Within the predetermined time window after the PDCCH, the time structure information does not change;

[0281] 5) Between the PDCCH and the valid slot, it is based on the same slot structure information;

[0282] 6) Within the predetermined time window after the PDCCH, it is based on the same slot structure information.

[0283] The above time unit is a slot. Of course, this embodiment does not exclude other time units where the SRS is determined according to the above rules, such as subframes, frames, etc.

[0284] The embodiments of the present application also provide a transmission method. Figure 3Flowchart of a transmission method provided for an embodiment. The transmission method provided in this embodiment can be applied to a second communication node, such as Figure 3 as shown, this method includes step 210 and step 220.

[0285] In step 210, receive indication information, where the indication information is used to indicate that the second communication node sends an uplink signal or indicates that the second communication node receives a downlink signal.

[0286] In step 220, perform signal transmission with the first communication node according to the indication information.

[0287] In the transmission method of this embodiment, the second communication node is instructed to send an uplink signal or receive a downlink signal through the indication information, which is applicable to various signal transmission situations, improves the flexibility of signal transmission between the first communication node and the second communication node, and ensures the reliability of transmission.

[0288] In one embodiment, the indication information includes antenna group association parameters, and the antenna group association parameters correspond to the antenna group for sending the uplink signal.

[0289] In one embodiment, the antenna group association parameters are configured by the first communication node in the measurement reference signal SRS resource or SRS resource set configured in the high-layer signaling.

[0290] In one embodiment, the first communication node scrambles the cyclic redundancy check code corresponding to the downlink control information DCI according to the mask selected by the antenna group, where the indication information is sent through the DCI.

[0291] In one embodiment, the indication information includes a first time slot offset parameter, and the first time slot offset parameter corresponds to the time slot for sending the uplink signal;

[0292] The uplink signal includes an aperiodic SRS.

[0293] In one embodiment, the first time slot offset parameter is configured by the first communication node in the SRS resource or SRS resource set configured in the high-layer signaling.

[0294] In one embodiment, when multiple first time slot offset parameters are configured in the SRS resource or SRS resource set, the first time slot offset parameter is determined by the first communication node according to the SRS request field of the DCI, and the multiple first time slot offset parameters are associated with multiple aperiodic SRS resource trigger parameters or code points.

[0295] In one embodiment, the indication information includes sub-band parameters, and the sub-band parameters correspond to the sub-band for sending the uplink signal;

[0296] The uplink signal includes an SRS;

[0297] The indication information is used to indicate that the second communication node repeats transmission or frequency-hopping transmission of SRS on the sub-band.

[0298] In one embodiment, it further includes:

[0299] Sending broadband SRS to the first communication node. The first communication node determines the sub-band by measuring the broadband SRS.

[0300] In one embodiment, the broadband SRS is sent by the second communication node on part of the physical resource blocks in the activated bandwidth part BWP.

[0301] In one embodiment, the indication information is sent through DCI for uplink scheduling or downlink scheduling;

[0302] The uplink signal includes SRS.

[0303] In one embodiment, the indication information includes configuration parameters of SRS, and the configuration parameters include at least one of the following: antenna group association parameters corresponding to sending SRS, time slot offset association parameters, spatial relationship of beams, frequency domain position, and cyclic shift of SRS sequence.

[0304] In one embodiment, in the case of triggering aperiodic SRS using DCI, the indication information is used to indicate that the second communication node sends the aperiodic SRS resource set in the first target time slot;

[0305] Wherein, the first target time slot is the (k + 1)-th available or valid time slot after the time slot corresponding to the first time slot offset parameter, and k is 0 or a positive integer.

[0306] In one embodiment, in the case of triggering aperiodic SRS using DCI, the indication information is used to indicate that the second communication node sends the aperiodic SRS resource set in the first target time slot;

[0307] Wherein, the first target time slot is the (k + 1)-th available or valid time slot counted from the reference time slot, or the (k + 1)-th available or valid time slot within N time slots counted from the reference time slot, k is 0 or a positive integer, N is a positive integer within a first preset range or equal to the product of E and (k + 1), E is a positive integer within a second preset range, the reference time slot is the value obtained by rounding down the product of n and the first parameter, n corresponds to the time slot triggering the aperiodic SRS, and the first parameter is the ratio of 2 to the power of μ SRS to the power of 2 to the power of μ PDCCH The ratio of powers, μ SRS is the subcarrier spacing configuration of the triggered SRS; μ PDCCHSubcarrier spacing configuration for PDCCH carrying a triggering command;

[0308] The interval between the first symbol of the SRS resource in the first target time slot and the last symbol of the PDCCH triggering the aperiodic SRS is greater than or equal to a preset value.

[0309] In one embodiment, the k is determined by at least one of the following methods:

[0310] Configured by radio resource control (RRC) signaling;

[0311] Equal to the first time slot offset parameter;

[0312] Configured by RRC signaling and the k corresponds to an SRS trigger state or an antenna group association parameter;

[0313] The k corresponds to a control resource set;

[0314] The k corresponds to the time slot where the PDCCH triggering the SRS is located;

[0315] The k is a predetermined value.

[0316] In one embodiment, in the case of using DCI to trigger an aperiodic SRS, the indication information is used to instruct the second communication node to send an aperiodic SRS in the second target time slot;

[0317] Wherein, the second target time slot is the first valid time slot in the time slot configured in the SRS resource or SRS resource set of the second communication node, or is the time slot with the smallest time slot offset from the time slot where the PDCCH triggering the aperiodic SRS is located among the corresponding valid time slots in the SRS resource or SRS resource set of the second communication node.

[0318] In one embodiment, in the case of using DCI to trigger an aperiodic SRS, or when at least one SRS resource in the SRS resource or SRS resource set configured in the time slot corresponding to the first time slot offset parameter or the time slot where the PDCCH triggering the aperiodic SRS is located is on at least one downlink symbol, the indication information is used to instruct the second communication node to send an aperiodic SRS in the third target time slot;

[0319] Wherein, the third target time slot is the first valid time slot among the N time slots after the time slot where the PDCCH triggering the aperiodic SRS is located, or is the first valid time slot among the N time slots after the time slot corresponding to the first time slot offset parameter, and N is a positive integer within a first preset range.

[0320] In one embodiment, when the indication information is used to indicate that the second communication node sends an uplink signal and the indication information does not include a first time slot offset parameter, the indication information is used to indicate that the second communication node sends an aperiodic SRS in a third target time slot;

[0321] Wherein, the third target time slot is the first valid time slot among N time slots after the time slot where the PDCCH triggering the aperiodic SRS is located, or is the first valid time slot among N time slots after the time slot corresponding to the first time slot offset parameter, and N is a positive integer within a first preset range.

[0322] In one embodiment, when there is no valid time slot among the N time slots, the indication information is used to indicate that the second communication node sends an aperiodic SRS on a part of symbols in the time slot corresponding to the first time slot offset parameter or in the last time slot among the N time slots.

[0323] In one embodiment, the valid time slot includes at least one of the following:

[0324] An available or valid uplink time slot or special time slot or flexible time slot;

[0325] An uplink time slot or special time slot or flexible time slot for sending at least one SRS resource in an SRS resource or SRS resource set;

[0326] An uplink time slot or special time slot or flexible time slot for sending all SRS resources in an SRS resource or SRS resource set;

[0327] An uplink time slot or special time slot or flexible time slot for sending at least one SRS resource in an SRS resource or SRS resource set and not conflicting with the sending of other uplink signals;

[0328] A time slot in which there are available uplink symbols for sending all SRS resources in an SRS resource or SRS resource set and satisfying the minimum time requirement between the PDCCH triggering the aperiodic SRS and all SRS transmissions in the resource set.

[0329] In one embodiment, the indication information includes a second time slot offset parameter, and the second time slot offset parameter corresponds to the time slot for receiving a downlink signal;

[0330] The downlink signal includes a channel state information reference signal CSI-RS;

[0331] The indication information is used to indicate that the second communication node receives an aperiodic CSI-RS.

[0332] In one embodiment, the second time slot offset parameter is configured by a first communication node in a CSI-RS resource or a CSI-RS resource set configured by higher layer signaling.

[0333] 22. In one embodiment, for a DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that the first communication node transmits the aperiodic CSI-RS resource set in a fourth target time slot, where the fourth target time slot is the (h + 1)-th available or valid time slot counted from the time slot where the aperiodic CSI-RS resource set is triggered, or is the (h + 1)-th available or valid time slot within M time slots counted from the time slot where the aperiodic CSI-RS resource set is triggered, h is 0 or a positive integer, N is a positive integer within a first preset range or equal to the product of F and (k + 1), and F is a positive integer within a second preset range.

[0334] In one embodiment, h is determined by at least one of the following methods:

[0335] Configured by RRC signaling;

[0336] Equal to the second time slot offset parameter;

[0337] Configured by RRC signaling and the h corresponds to a CSI-RS trigger state;

[0338] The h corresponds to a control resource set;

[0339] The h corresponds to the time slot where the PDCCH triggering the CSI-RS is located.

[0340] In one embodiment, for a DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that the first communication node transmits the aperiodic CSI-RS in a fifth target time slot, where the fifth target time slot is the first valid time slot among the time slots configured in the CSI-RS resource set of the second communication node; or is the time slot with the smallest time slot offset among the valid time slots configured in the CSI-RS resource set of the second communication node.

[0341] In one embodiment, for a DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that the first communication node transmits the aperiodic CSI-RS in a fifth target time slot, where the fifth target time slot is the first valid time slot among the M time slots after the time slot where the PDCCH triggering the aperiodic CSI-RS is located, or is the first valid time slot among the M time slots after the time slot corresponding to the second time slot offset parameter, and M is a positive integer within a second preset range.

[0342] In one embodiment, when the indication information is used to indicate that a second communication node receives a downlink signal and the indication information does not include a second time slot offset parameter, the indication information indicates that a first communication node transmits an aperiodic CSI-RS resource set in a fifth target time slot;

[0343] Wherein, the fifth target time slot is the first valid time slot among M time slots after the time slot where the PDCCH triggering the aperiodic CSI-RS is located, or the first valid time slot among M time slots after the time slot corresponding to the first time slot offset parameter, and M is a positive integer within a second preset range.

[0344] In one embodiment, when there is no valid time slot among the M time slots, the indication information is used to indicate that the first communication node transmits an aperiodic CSI-RS on a partial symbol in the time slot corresponding to the second time slot offset parameter or in the last time slot among the M time slots.

[0345] In one embodiment, the valid time slot includes at least one of the following:

[0346] An available or valid downlink time slot or special time slot or flexible time slot;

[0347] An uplink time slot or special time slot or flexible time slot for transmitting at least one CSI-RS resource in a CSI-RS resource or a CSI-RS resource set;

[0348] An uplink time slot or special time slot or flexible time slot for transmitting all CSI-RS resources in a CSI-RS resource or a CSI-RS resource set;

[0349] An uplink time slot or special time slot or flexible time slot for transmitting at least one CSI-RS resource in a CSI-RS resource or a CSI-RS resource set and not conflicting with the transmission of other uplink signals;

[0350] A time slot in which there are available downlink symbols for transmitting all CSI-RS resources in a CSI-RS resource or a CSI-RS resource set and satisfying the minimum time requirement between the PDCCH triggering the aperiodic CSI-RS and the transmission of all CSI-RS resources in the resource set.

[0351] In one embodiment, it further includes:

[0352] When there is a conflict between at least one resource in the triggered aperiodic SRS or aperiodic CSI-RS resource set and other signals to be transmitted, remove the conflicting symbols in the resource set, or postpone the transmission of the aperiodic SRS or aperiodic CSI-RS, or remove the conflicting other signals to be transmitted, and preferentially transmit the aperiodic SRS or aperiodic CSI-RS.

[0353] In one embodiment, the indication information is further used to indicate:

[0354] In the case where the transmission of at least two aperiodic SRSs or aperiodic CSI-RSs is triggered by the same DCI or different DCIs, or in the case where multiple SRS resources or SRS resource sets or multiple CSI-RS resources or CSI-RS resource sets triggered conflict with each other, only the aperiodic SRS resource or SRS resource set or aperiodic CSI-RS resource or resource set triggered by the most recent DCI is transmitted, or only the aperiodic SRS resource or SRS resource set or aperiodic CSI-RS resource or resource set with the smallest or largest resource set identifier is transmitted.

[0355] In one embodiment, the indication information includes a third time slot offset parameter, and the third time slot offset parameter corresponds to the time slot for transmitting the downlink signal;

[0356] The downlink signal includes PDSCH;

[0357] The indication information is used to indicate that the second communication node receives the PDSCH.

[0358] In one embodiment, the first communication node is further used for:

[0359] Configuring at least one information element through RRC signaling, where the at least one information element is used to configure the time domain relationship between the PDCCH and the PDSCH, and the at least one information element respectively corresponds to at least one time slot offset parameter;

[0360] In the case where there are at least two information elements, determining, through DCI signaling, the time slot offset parameter corresponding to one information element as the third time slot offset parameter.

[0361] In one embodiment, in the case where DCI triggers the transmission of PDSCH, the indication information is used to indicate that the second communication node receives the PDSCH in the sixth target time slot, where the sixth target time slot is the time slot where the PDCCH is located or the r+1th available or valid downlink time slot or special time slot after the time slot corresponding to the sixth time slot offset parameter, and r is 0 or a positive integer.

[0362] In one embodiment, the r is determined by at least one of the following methods:

[0363] Configured through RRC signaling;

[0364] Equal to the third time slot offset parameter;

[0365] Configured through RRC signaling and the r corresponds to a CSI-RS trigger state;

[0366] The r corresponds to a control resource set;

[0367] The r corresponds to the time slot where the PDCCH scheduling the PDSCH is located;

[0368] The r is a predetermined value.

[0369] In one embodiment, the indication information includes a fourth time slot offset parameter, and the fourth time slot offset parameter corresponds to the time slot for transmitting an uplink signal;

[0370] The uplink signal includes a PUSCH;

[0371] The indication information is used to instruct the second communication node to transmit the PUSCH.

[0372] In one embodiment, the first communication node is further configured to:

[0373] Configure at least one information element through RRC signaling, where the at least one information element is used to configure the time domain relationship between the PDCCH and the PUSCH, and the at least one information element corresponds to at least one time slot offset parameter respectively;

[0374] When there are at least two information elements, determine, through DCI signaling, the time slot offset parameter corresponding to one information element as the fourth time slot offset parameter.

[0375] In one embodiment, when DCI triggers the transmission of the PUSCH, the indication information is used to instruct the second communication node to transmit the PUSCH in a seventh target time slot, where the seventh target time slot is the time slot where the PDCCH is located or the (y + 1)-th available or valid downlink time slot or special time slot after the time slot corresponding to the fourth time slot offset association parameter, and y is 0 or a positive integer.

[0376] In one embodiment, y is determined by at least one of the following methods:

[0377] Configured through RRC signaling;

[0378] Equal to the fourth time slot offset parameter;

[0379] Configured through RRC signaling and y corresponds to a CSI-RS trigger state;

[0380] The y corresponds to a control resource set;

[0381] The y corresponds to the time slot where the PDCCH scheduling the PDSCH is located.

[0382] In one embodiment, the indication information includes a fifth time slot offset parameter, and the fifth time slot offset parameter corresponds to the time slot for transmitting an uplink signal;

[0383] The uplink signal includes a PUCCH associated with acknowledgment and non-acknowledgment information;

[0384] The indication information is used to instruct the second communication node to send the PUCCH associated with the acknowledgment and non-acknowledgment information.

[0385] In one embodiment, the first communication node is further configured to:

[0386] Configure at least one preset parameter through RRC signaling, where the preset parameter is used to configure the time domain relationship between the PDSCH and the PUCCH.

[0387] In one embodiment, the indication information is used to instruct the second communication node to send a PUCCH in an eighth target time slot, where the eighth target time slot is the time slot in which the PDSCH is located or the (x + 1)-th available or valid downlink time slot or special time slot after the time slot corresponding to the fifth time slot offset association parameter, and x is 0 or a positive integer.

[0388] In one embodiment, x is determined by at least one of the following methods:

[0389] Configured through RRC signaling;

[0390] Equal to the fifth time slot offset parameter;

[0391] Configured through RRC signaling and x corresponds to a CSI-RS trigger state;

[0392] x corresponds to a control resource set;

[0393] x corresponds to the time slot in which the PDCCH scheduling the PDSCH is located.

[0394] An embodiment of the present application further provides a transmission device. Figure 4 It is a schematic structural diagram of the transmission device provided for an embodiment. As Figure 4 shown, the transmission device includes: a sending module 310 and a first transmission module 320.

[0395] The sending module 310 is configured to send indication information, where the indication information is used to instruct the second communication node to send an uplink signal or to instruct the second communication node to receive a downlink signal;

[0396] The first transmission module 320 is configured to perform signal transmission with the second communication node according to the indication information.

[0397] The transmission device of this embodiment indicates to the second communication node to send an uplink signal or receive a downlink signal by sending indication information, which is applicable to various signal transmission scenarios, improving the flexibility of signal transmission between the first communication node and the second communication node and ensuring the reliability of transmission.

[0398] In one embodiment, the indication information includes antenna group association parameters, and the antenna group association parameters correspond to the antenna group for sending the uplink signal.

[0399] In one embodiment, it further includes at least one of the following:

[0400] Configure the antenna group association parameters in the measurement reference signal SRS resource or SRS resource set configured by the high-layer signaling;

[0401] Scramble the cyclic redundancy check code corresponding to the downlink control information DCI according to the mask selected by the antenna group, wherein the indication information is sent through the DCI.

[0402] In one embodiment, the indication information includes a first time slot offset parameter, and the first time slot offset parameter corresponds to the time slot for sending the uplink signal;

[0403] The uplink signal includes an aperiodic SRS.

[0404] In one embodiment, it further includes:

[0405] Configure the first time slot offset parameter in the SRS resource or SRS resource set configured by the high-layer signaling.

[0406] In one embodiment, it further includes:

[0407] When multiple first time slot offset parameters are configured in the SRS resource or SRS resource set, determine the first time slot offset parameter according to the SRS request field of the DCI, and the multiple first time slot offset parameters are associated with multiple aperiodic SRS resource trigger parameters or code points.

[0408] In one embodiment, the indication information includes subband parameters, and the subband parameters correspond to the subband for sending the uplink signal;

[0409] The uplink signal includes an SRS;

[0410] The indication information is used to instruct the second communication node to repeatedly send or frequency-hop send the SRS on the subband.

[0411] In one embodiment, it further includes:

[0412] Receive the broadband SRS sent by the second communication node;

[0413] The sub - band is determined by measuring the SRS of the wide - band.

[0414] In one embodiment, the SRS of the wide - band is sent by a second communication node in partial physical resource blocks in an activated bandwidth part (BWP).

[0415] In one embodiment, the indication information is sent by DCI for uplink scheduling or downlink scheduling;

[0416] The uplink signal includes SRS.

[0417] In one embodiment, the indication information includes configuration parameters of SRS, and the configuration parameters include at least one of the following: antenna group association parameters corresponding to sending SRS, time - slot offset association parameters, spatial relationship of beams, frequency - domain position, and cyclic shift of the SRS sequence.

[0418] In one embodiment, in the case of using DCI to trigger an aperiodic SRS, the indication information is used to indicate that the second communication node sends the aperiodic SRS resource set in a first target time - slot;

[0419] wherein, the first target time - slot is the (k + 1)-th available or valid time - slot after the time - slot corresponding to the first time - slot offset parameter, and k is 0 or a positive integer.

[0420] In one embodiment, in the case of using DCI to trigger an aperiodic SRS, the indication information is used to indicate that the second communication node sends the aperiodic SRS resource set in a first target time - slot;

[0421] wherein, the first target time - slot is the (k + 1)-th available or valid time - slot counted from a reference time - slot, or the (k + 1)-th available or valid time - slot within N time - slots counted from a reference time - slot, k is 0 or a positive integer, N is a positive integer within a first preset range or equal to the product of E and (k + 1), E is a positive integer within a second preset range, the reference time - slot is the value obtained by rounding down the product of n and a first parameter, n corresponds to the time - slot triggering the aperiodic SRS, the first parameter is the ratio of 2 to the power of μ SRS to the power of 2 to the power of μ PDCCH and μ SRS is the sub - carrier spacing configuration of the triggered SRS; μ PDCCH is the sub - carrier spacing configuration of the PDCCH carrying the trigger command;

[0422] The interval between the first symbol of the SRS resource in the first target time - slot and the last symbol of the PDCCH triggering the aperiodic SRS is greater than or equal to a preset value.

[0423] In one embodiment, k is determined by at least one of the following methods:

[0424] Configured by Radio Resource Control (RRC) signaling;

[0425] Equal to the first time slot offset parameter;

[0426] Configured by RRC signaling and k corresponds to a sounding reference signal (SRS) triggering state or antenna group association parameter;

[0427] k corresponds to a control resource set;

[0428] k corresponds to the time slot in which the physical downlink control channel (PDCCH) triggering the SRS is located;

[0429] k is a predetermined value.

[0430] In one embodiment, in the case of using a downlink control information (DCI) to trigger an aperiodic SRS, the indication information is used to instruct a second communication node to transmit an aperiodic SRS in a second target time slot;

[0431] Wherein, the second target time slot is the first valid time slot in the SRS resource or the time slots configured in the SRS resource set of the second communication node, or is the time slot with the smallest time slot offset from the time slot in which the PDCCH triggering the aperiodic SRS is located among the corresponding valid time slots in the SRS resource or the SRS resource set of the second communication node.

[0432] In one embodiment, in the case of using a DCI to trigger an aperiodic SRS, or in the case where at least one SRS resource in the SRS resource or the SRS resource set configured in the time slot corresponding to the first time slot offset parameter or the time slot in which the PDCCH triggering the aperiodic SRS is located has at least one downlink symbol, the indication information is used to instruct a second communication node to transmit an aperiodic SRS in a third target time slot;

[0433] Wherein, the third target time slot is the first valid time slot among N time slots after the time slot in which the PDCCH triggering the aperiodic SRS is located, or is the first valid time slot among N time slots after the time slot corresponding to the first time slot offset parameter, and N is a positive integer within a first preset range.

[0434] In one embodiment, in the case where the indication information is used to instruct a second communication node to transmit an uplink signal and the indication information does not include the first time slot offset parameter, the indication information is used to instruct a second communication node to transmit an aperiodic SRS in a third target time slot;

[0435] Wherein, the third target time slot is the first valid time slot among N time slots after the time slot where the PDCCH triggering the aperiodic SRS is located, or is the first valid time slot among N time slots after the time slot corresponding to the first time slot offset parameter, and N is a positive integer within a first preset range.

[0436] In one embodiment, in the case where there is no valid time slot among the N time slots, the indication information is used to instruct the second communication node to send an aperiodic SRS on a part of symbols in the time slot corresponding to the first time slot offset parameter or in the last time slot among the N time slots.

[0437] In one embodiment, the valid time slot includes at least one of the following:

[0438] An available or valid uplink time slot or special time slot or flexible time slot;

[0439] An uplink time slot or special time slot or flexible time slot for sending at least one SRS resource in an SRS resource or SRS resource set;

[0440] An uplink time slot or special time slot or flexible time slot for sending all SRS resources in an SRS resource or SRS resource set;

[0441] An uplink time slot or special time slot or flexible time slot for sending at least one SRS resource in an SRS resource or SRS resource set and not conflicting with the transmission of other uplink signals;

[0442] A time slot in which there are available uplink symbols for sending all SRS resources in an SRS resource or SRS resource set and satisfying the minimum time requirement between the PDCCH triggering the aperiodic SRS and all SRS transmissions in the resource set.

[0443] In one embodiment, the indication information includes a second time slot offset parameter corresponding to the time slot for receiving a downlink signal;

[0444] The downlink signal includes a channel state information reference signal CSI-RS;

[0445] The indication information is used to instruct the second communication node to receive an aperiodic CSI-RS.

[0446] In one embodiment, it further includes:

[0447] Configuring the second time slot offset parameter in a CSI-RS resource or CSI-RS resource set configured by high-layer signaling.

[0448] In one embodiment, for a DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that a first communication node transmits the aperiodic CSI-RS resource set in a fourth target time slot, where the fourth target time slot is the (h + 1)-th available or valid time slot counted from the time slot where the aperiodic CSI-RS resource set is triggered, or is the (h + 1)-th available or valid time slot within M time slots counted from the time slot where the aperiodic CSI-RS resource set is triggered, h is 0 or a positive integer, N is a positive integer within a first preset range or is equal to the product of F and (k + 1), and F is a positive integer within a second preset range.

[0449] In one embodiment, the h is determined by at least one of the following methods:

[0450] Configured by RRC signaling;

[0451] Equal to a second time slot offset parameter;

[0452] Configured by RRC signaling and the h corresponds to a CSI-RS trigger state;

[0453] The h corresponds to a control resource set;

[0454] The h corresponds to the time slot where the PDCCH triggering the CSI-RS is located;

[0455] The h is a predetermined value.

[0456] In one embodiment, for a DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that a first communication node transmits the aperiodic CSI-RS in a fifth target time slot, where the fifth target time slot is the first valid time slot among the time slots configured in the CSI-RS resource set of a second communication node; or is the time slot with the smallest time slot offset among the valid time slots configured in the CSI-RS resource set of the second communication node.

[0457] In one embodiment, for a DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that a first communication node transmits the aperiodic CSI-RS in a fifth target time slot, where the fifth target time slot is the first valid time slot among M time slots after the time slot where the PDCCH triggering the aperiodic CSI-RS is located, or is the first valid time slot among M time slots after the time slot corresponding to the second time slot offset parameter, and M is a positive integer within a second preset range.

[0458] In one embodiment, when the indication information is used to indicate that a second communication node receives a downlink signal and the indication information does not include a second time slot offset parameter, the indication information indicates that the first communication node transmits the aperiodic CSI-RS resource set;

[0459] Wherein, the fifth target time slot is the first valid time slot among M time slots after the time slot where the PDCCH triggering the aperiodic CSI-RS is located, or is the first valid time slot among M time slots after the time slot corresponding to the first time slot offset parameter, and M is a positive integer within a second preset range.

[0460] In one embodiment, when there is no valid time slot among the M time slots, the indication information is used to indicate that the first communication node sends an aperiodic CSI-RS on a partial symbol in the time slot corresponding to the second time slot offset parameter or in the last time slot among the M time slots.

[0461] In one embodiment, the valid time slot includes at least one of the following:

[0462] An available or valid downlink time slot or special time slot or flexible time slot;

[0463] An uplink time slot or special time slot or flexible time slot for sending at least one CSI-RS resource in a CSI-RS resource or a CSI-RS resource set;

[0464] An uplink time slot or special time slot or flexible time slot for sending all CSI-RS resources in a CSI-RS resource or a CSI-RS resource set;

[0465] An uplink time slot or special time slot or flexible time slot for sending at least one CSI-RS resource in a CSI-RS resource or a CSI-RS resource set and not conflicting with the transmission of other uplink signals;

[0466] A time slot in which there are available downlink symbols for sending all CSI-RS resources in a CSI-RS resource or a CSI-RS resource set and satisfying the minimum time requirement between the PDCCH triggering the aperiodic CSI-RS and the transmission of all CSI-RS resources in the resource set.

[0467] In one embodiment, it further includes:

[0468] When there is a conflict between at least one resource in the triggered aperiodic SRS or aperiodic CSI-RS resource set and other signals to be transmitted, remove the conflicting symbols in the resource set, or postpone the transmission of the aperiodic SRS or aperiodic CSI-RS, or remove the conflicting other signals to be transmitted, and preferentially transmit the aperiodic SRS or aperiodic CSI-RS.

[0469] In one embodiment, the indication information is further used to indicate:

[0470] In the case where at least two aperiodic SRSs or aperiodic CSI-RSs are triggered by the same DCI or different DCIs, or in the case where multiple triggered SRS resources or SRS resource sets or multiple CSI-RS resources or CSI-RS resource sets conflict with each other, only the aperiodic SRS resource or SRS resource set or aperiodic CSI-RS resource or resource set triggered by the most recent DCI is transmitted, or only the aperiodic SRS resource or SRS resource set or aperiodic CSI-RS resource or resource set with the smallest or largest resource set identifier is transmitted.

[0471] In one embodiment, the indication information includes a third time slot offset parameter corresponding to the time slot for transmitting the downlink signal.

[0472] The downlink signal includes PDSCH.

[0473] The indication information is used to instruct the second communication node to receive the PDSCH.

[0474] In one embodiment, it further includes:

[0475] Configuring at least one information element through RRC signaling, where the at least one information element is used to configure the time domain relationship between the PDCCH and the PDSCH, and the at least one information element respectively corresponds to at least one time slot offset parameter.

[0476] In the case where the information element is at least two, determining, through DCI signaling, the time slot offset parameter corresponding to one information element as the third time slot offset parameter.

[0477] In one embodiment, in the case where DCI triggers the transmission of PDSCH, the indication information is used to instruct the second communication node to receive the PDSCH in the sixth target time slot, where the sixth target time slot is the time slot where the PDCCH is located or the (r + 1)-th available or valid downlink time slot or special time slot after the time slot corresponding to the sixth time slot offset parameter, and r is 0 or a positive integer.

[0478] In one embodiment, the r is determined by at least one of the following methods:

[0479] Configured through RRC signaling;

[0480] Equal to the third time slot offset parameter;

[0481] Configured through RRC signaling and the r corresponds to a CSI-RS trigger state;

[0482] The r corresponds to a control resource set;

[0483] The r corresponds to the time slot where the PDCCH scheduling the PDSCH is located.

[0484] The r is a predetermined value.

[0485] In one embodiment, the indication information includes a fourth time slot offset parameter corresponding to the time slot for transmitting the uplink signal;

[0486] The uplink signal includes a PUSCH;

[0487] The indication information is used to instruct the second communication node to transmit the PUSCH.

[0488] In one embodiment, it further includes:

[0489] Configuring at least one information element through RRC signaling, where the at least one information element is used to configure the time domain relationship between the PDCCH and the PUSCH, and the at least one information element respectively corresponds to at least one time slot offset parameter;

[0490] When there are at least two information elements, determining, through DCI signaling, the time slot offset parameter corresponding to one information element as the fourth time slot offset parameter.

[0491] In one embodiment, when the PUSCH transmission is triggered by DCI, the indication information is used to instruct the second communication node to transmit the PUSCH in the seventh target time slot, where the seventh target time slot is the time slot where the PDCCH is located or the (y + 1)-th available or valid downlink time slot or special time slot after the time slot corresponding to the fourth time slot offset association parameter, and y is 0 or a positive integer.

[0492] In one embodiment, the y is determined by at least one of the following methods:

[0493] Configured through RRC signaling;

[0494] Equal to the fourth time slot offset parameter;

[0495] Configured through RRC signaling and the y corresponds to a CSI-RS trigger state;

[0496] The y corresponds to a control resource set;

[0497] The y corresponds to the time slot where the PDCCH scheduling the PDSCH is located;

[0498] The y is a predetermined value.

[0499] In one embodiment, the indication information includes a fifth time slot offset parameter corresponding to the time slot for transmitting the uplink signal;

[0500] The uplink signal includes a PUCCH associated with acknowledgment and non-acknowledgment information;

[0501] The indication information is used to indicate the PUCCH for the second communication node to send the associated acknowledgment and non-acknowledgment information.

[0502] In one embodiment, it further includes:

[0503] At least one preset parameter is configured through RRC signaling, and the preset parameter is used to configure the time-domain relationship between the PDSCH and the PUCCH.

[0504] In one embodiment, the indication information is used to indicate that the second communication node sends the PUCCH in the eighth target time slot, where the eighth target time slot is the time slot where the PDSCH is located or the (x + 1)-th available or valid downlink time slot or special time slot after the time slot corresponding to the fifth time slot offset association parameter, and x is 0 or a positive integer.

[0505] In one embodiment, the x is determined by at least one of the following methods:

[0506] Configured through RRC signaling;

[0507] Equal to the fifth time slot offset parameter;

[0508] Configured through RRC signaling and the x corresponds to a CSI-RS triggering state;

[0509] The x corresponds to a control resource set;

[0510] The x corresponds to the time slot where the PDCCH scheduling the PDSCH is located;

[0511] The x is a predetermined value.

[0512] The transmission device proposed in this embodiment and the transmission method proposed in the above embodiment belong to the same inventive concept. For technical details not described in detail in this embodiment, reference can be made to any of the above embodiments, and this embodiment has the same beneficial effects as the execution of the transmission method.

[0513] An embodiment of the present application further provides a transmission device. Figure 5 It is a schematic structural diagram of another transmission device provided for an embodiment. As Figure 5 shown, the transmission device includes: a receiving module 410 and a second transmission module 420.

[0514] The receiving module 410 is configured to receive indication information, where the indication information is used to indicate that the second communication node sends an uplink signal or indicates that the second communication node receives a downlink signal;

[0515] The second transmission module 420 is configured to perform signal transmission with the first communication node according to the indication information.

[0516] The transmission device of this embodiment is applicable to various signal transmission scenarios by receiving indication information and sending an uplink signal to a first communication node or receiving a downlink signal sent by the first communication node according to the second indication information, improving the flexibility of signal transmission between the first communication node and the second communication node and ensuring the reliability of transmission.

[0517] In one embodiment, the indication information includes antenna group association parameters, and the antenna group association parameters correspond to the antenna group for sending the uplink signal.

[0518] In one embodiment, the antenna group association parameters are configured in a measurement reference signal SRS resource or an SRS resource set configured by the first communication node in high-layer signaling.

[0519] In one embodiment, the first communication node scrambles the cyclic redundancy check code corresponding to the downlink control information DCI according to a mask selected by the antenna group, and the indication information is sent through the DCI.

[0520] In one embodiment, the indication information includes a first time slot offset parameter, and the first time slot offset parameter corresponds to the time slot for sending the uplink signal;

[0521] The uplink signal includes an aperiodic SRS.

[0522] In one embodiment, the first time slot offset parameter is configured in an SRS resource or an SRS resource set configured by the first communication node in high-layer signaling.

[0523] In one embodiment, when multiple first time slot offset parameters are configured in an SRS resource or an SRS resource set, the first time slot offset parameter is determined by the first communication node according to the SRS request field of the DCI, and the multiple first time slot offset parameters are associated with multiple aperiodic SRS resource trigger parameters or code points.

[0524] In one embodiment, the indication information includes subband parameters, and the subband parameters correspond to the subband for sending the uplink signal;

[0525] The uplink signal includes an SRS;

[0526] The indication information is used to instruct the second communication node to repeatedly send or frequency-hop send the SRS on the subband.

[0527] In one embodiment, it further includes:

[0528] Sending a broadband SRS to the first communication node. The first communication node determines the subband by measuring the broadband SRS.

[0529] In one embodiment, the broadband SRS is transmitted by a second communication node on partial physical resource blocks in an activated bandwidth part (BWP).

[0530] In one embodiment, the indication information is transmitted by DCI for uplink scheduling or downlink scheduling;

[0531] The uplink signal includes SRS.

[0532] In one embodiment, the indication information includes configuration parameters of SRS, and the configuration parameters include at least one of the following: antenna group association parameters corresponding to the transmission of SRS, time slot offset association parameters, spatial relationship of beams, frequency domain position, and cyclic shift of the SRS sequence.

[0533] In one embodiment, in the case of triggering an aperiodic SRS using DCI, the indication information is used to instruct the second communication node to transmit the aperiodic SRS resource set in a first target time slot;

[0534] Wherein, the first target time slot is the (k + 1)-th available or valid time slot after the time slot corresponding to the first time slot offset parameter, and k is 0 or a positive integer.

[0535] In one embodiment, in the case of triggering an aperiodic SRS using DCI, the indication information is used to instruct the second communication node to transmit the aperiodic SRS resource set in a first target time slot;

[0536] Wherein, the first target time slot is the (k + 1)-th available or valid time slot counted from a reference time slot, or the (k + 1)-th available or valid time slot within N time slots counted from a reference time slot, k is 0 or a positive integer, N is a positive integer within a first preset range or equal to the product of E and (k + 1), E is a positive integer within a second preset range, the reference time slot is the value obtained by rounding down the product of n and a first parameter, n corresponds to the time slot triggering the aperiodic SRS, the first parameter is the ratio of 2 to the power of μ SRS to the power of μ PDCCH and 2 to the power of μ SRS is the subcarrier spacing configuration of the triggered SRS; μ PDCCH is the subcarrier spacing configuration of the PDCCH carrying the trigger command;

[0537] The interval between the first symbol of the SRS resource in the first target time slot and the last symbol of the PDCCH triggering the aperiodic SRS is greater than or equal to a preset value.

[0538] In one embodiment, the k is determined by at least one of the following methods:

[0539] Configured by radio resource control (RRC) signaling;

[0540] is equal to the first time slot offset parameter;

[0541] configured by RRC signaling and k corresponds to an SRS trigger state or an antenna group association parameter;

[0542] k corresponds to a control resource set;

[0543] k corresponds to the time slot in which the PDCCH triggering the SRS is located;

[0544] k is a predetermined value.

[0545] In one embodiment, when triggering an aperiodic SRS using DCI, the indication information is used to instruct a second communication node to send an aperiodic SRS in a second target time slot;

[0546] wherein the second target time slot is the first valid time slot in the SRS resource or the time slots configured in the SRS resource set of the second communication node, or is the time slot with the smallest time slot offset from the time slot in which the PDCCH triggering the aperiodic SRS is located among the corresponding valid time slots in the SRS resource or the SRS resource set of the second communication node.

[0547] In one embodiment, when triggering an aperiodic SRS using DCI, or when at least one SRS resource in the SRS resource or the SRS resource set configured in the time slot corresponding to the first time slot offset parameter or the time slot in which the PDCCH triggering the aperiodic SRS is located is on at least one downlink symbol, the indication information is used to instruct a second communication node to send an aperiodic SRS in a third target time slot;

[0548] wherein the third target time slot is the first valid time slot among the N time slots after the time slot in which the PDCCH triggering the aperiodic SRS is located, or is the first valid time slot among the N time slots after the time slot corresponding to the first time slot offset parameter, and N is a positive integer within a first preset range.

[0549] In one embodiment, when the indication information is used to instruct a second communication node to send an uplink signal and the indication information does not include the first time slot offset parameter, the indication information is used to instruct a second communication node to send an aperiodic SRS in a third target time slot;

[0550] wherein the third target time slot is the first valid time slot among the N time slots after the time slot in which the PDCCH triggering the aperiodic SRS is located, or is the first valid time slot among the N time slots after the time slot corresponding to the first time slot offset parameter, and N is a positive integer within a first preset range.

[0551] In one embodiment, in the case that there is no valid time slot among the N time slots, the indication information is used to instruct the second communication node to send an aperiodic SRS on the time slot corresponding to the first time slot offset parameter or on partial symbols of the last time slot among the N time slots.

[0552] In one embodiment, the valid time slot includes at least one of the following:

[0553] An available or valid uplink time slot, special time slot, or flexible time slot;

[0554] An uplink time slot, special time slot, or flexible time slot for sending at least one SRS resource in an SRS resource or SRS resource set;

[0555] An uplink time slot, special time slot, or flexible time slot for sending all SRS resources in an SRS resource or SRS resource set;

[0556] An uplink time slot, special time slot, or flexible time slot for sending at least one SRS resource in an SRS resource or SRS resource set and not conflicting with the transmission of other uplink signals;

[0557] A time slot in which there are available uplink symbols for sending all SRS resources in an SRS resource or SRS resource set and that meets the minimum time requirement between the PDCCH triggering the aperiodic SRS and all SRS transmissions in the resource set.

[0558] In one embodiment, the indication information includes a second time slot offset parameter, and the second time slot offset parameter corresponds to the time slot for receiving a downlink signal;

[0559] The downlink signal includes a channel state information reference signal CSI-RS;

[0560] The indication information is used to instruct the second communication node to receive an aperiodic CSI-RS.

[0561] In one embodiment, the second time slot offset parameter is configured by the first communication node in a CSI-RS resource or CSI-RS resource set configured by high-layer signaling.

[0562] In one embodiment, for the DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that the first communication node transmits the aperiodic CSI-RS resource set in the fourth target time slot, where the fourth target time slot is the (h + 1)-th available or valid time slot counted from the time slot where the aperiodic CSI-RS resource set is triggered, or is the (h + 1)-th available or valid time slot within M time slots counted from the time slot where the aperiodic CSI-RS resource set is triggered, h is 0 or a positive integer, N is a positive integer within a first preset range or equal to the product of F and (k + 1), and F is a positive integer within a second preset range.

[0563] In one embodiment, h is determined by at least one of the following methods:

[0564] Configured by RRC signaling;

[0565] Equal to the second time slot offset parameter;

[0566] Configured by RRC signaling and the h corresponds to a CSI-RS trigger state;

[0567] The h corresponds to a control resource set;

[0568] The h corresponds to the time slot where the PDCCH triggering the CSI-RS is located;

[0569] The h is a predetermined value.

[0570] In one embodiment, for the DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that the first communication node transmits the aperiodic CSI-RS in the fifth target time slot, where the fifth target time slot is the first valid time slot among the time slots configured in the CSI-RS resource set of the second communication node; or is the time slot with the smallest time slot offset among the valid time slots configured in the CSI-RS resource set of the second communication node.

[0571] In one embodiment, for the DCI-triggered aperiodic CSI-RS resource set, the indication information is used to indicate that the first communication node transmits the aperiodic CSI-RS in the fifth target time slot, where the fifth target time slot is the first valid time slot among the M time slots after the time slot where the PDCCH triggering the aperiodic CSI-RS is located, or is the first valid time slot among the M time slots after the time slot corresponding to the second time slot offset parameter, and M is a positive integer within a second preset range.

[0572] In one embodiment, when the indication information is used to indicate that the second communication node receives a downlink signal and the indication information does not include the second time slot offset parameter, the indication information indicates that the first communication node transmits the aperiodic CSI-RS resource set;

[0573] Wherein, the fifth target time slot is the first valid time slot among M time slots after the time slot where the PDCCH triggering the aperiodic CSI-RS is located, or is the first valid time slot among M time slots after the time slot corresponding to the first time slot offset parameter, and M is a positive integer within a second preset range.

[0574] In one embodiment, when there is no valid time slot among the M time slots, the indication information is used to indicate that the first communication node sends an aperiodic CSI-RS on partial symbols in the time slot corresponding to the second time slot offset parameter or in the last time slot among the M time slots.

[0575] In one embodiment, the valid time slot includes at least one of the following:

[0576] An available or valid downlink time slot or special time slot or flexible time slot;

[0577] An uplink time slot or special time slot or flexible time slot for sending at least one CSI-RS resource in a CSI-RS resource or a CSI-RS resource set;

[0578] An uplink time slot or special time slot or flexible time slot for sending all CSI-RS resources in a CSI-RS resource or a CSI-RS resource set;

[0579] An uplink time slot or special time slot or flexible time slot for sending at least one CSI-RS resource in a CSI-RS resource or a CSI-RS resource set and not conflicting with the transmission of other uplink signals;

[0580] A time slot in which there are available downlink symbols for sending all CSI-RS resources in a CSI-RS resource or a CSI-RS resource set and satisfying the minimum time requirement between the PDCCH triggering the aperiodic CSI-RS and the transmission of all CSI-RS resources in the resource set.

[0581] In one embodiment, it further includes:

[0582] When there is a conflict between at least one resource in the triggered aperiodic SRS or aperiodic CSI-RS resource set and other signals to be transmitted, remove the conflicting symbols in the resource set, or postpone the transmission of the aperiodic SRS or aperiodic CSI-RS, or remove the conflicting other signals to be transmitted, and preferentially transmit the aperiodic SRS or aperiodic CSI-RS.

[0583] In one embodiment, the indication information is further used to indicate:

[0584] In the case where the transmission of at least two aperiodic SRSs or aperiodic CSI-RSs is triggered by the same DCI or different DCIs, or in the case where multiple triggered SRS resources or SRS resource sets or multiple CSI-RS resources or CSI-RS resource sets conflict with each other, only the aperiodic SRS resource or SRS resource set or aperiodic CSI-RS resource or resource set triggered by the most recent DCI is transmitted, or only the aperiodic SRS resource or SRS resource set or aperiodic CSI-RS resource or resource set with the smallest or largest resource set identifier is transmitted.

[0585] In one embodiment, the indication information includes a third time slot offset parameter, and the third time slot offset parameter corresponds to the time slot for transmitting the downlink signal;

[0586] The downlink signal includes PDSCH;

[0587] The indication information is used to instruct the second communication node to receive the PDSCH.

[0588] In one embodiment, the first communication node is further configured to:

[0589] Configure at least one information element through RRC signaling, where the at least one information element is used to configure the time domain relationship between the PDCCH and the PDSCH, and the at least one information element respectively corresponds to at least one time slot offset parameter;

[0590] In the case where there are at least two information elements, determine, through DCI signaling, the time slot offset parameter corresponding to one information element as the third time slot offset parameter.

[0591] In one embodiment, in the case where DCI triggers the transmission of PDSCH, the indication information is used to instruct the second communication node to receive the PDSCH in the sixth target time slot, where the sixth target time slot is the r+1th available or valid downlink time slot or special time slot after the time slot where the PDCCH is located or the time slot corresponding to the sixth time slot offset parameter, and r is 0 or a positive integer.

[0592] In one embodiment, the r is determined by at least one of the following methods:

[0593] Configured through RRC signaling;

[0594] Equal to the third time slot offset parameter;

[0595] Configured through RRC signaling and the r corresponds to a CSI-RS trigger state;

[0596] The r corresponds to a control resource set;

[0597] The r corresponds to the time slot where the PDCCH scheduling the PDSCH is located;

[0598] The r is a predetermined value.

[0599] In an embodiment, the indication information includes a fourth time slot offset parameter, and the fourth time slot offset parameter corresponds to the time slot for transmitting the uplink signal;

[0600] The uplink signal includes a PUSCH;

[0601] The indication information is used to instruct the second communication node to transmit the PUSCH.

[0602] In an embodiment, the first communication node is further configured to:

[0603] Configure at least one information element through RRC signaling, where the at least one information element is used to configure the time domain relationship between the PDCCH and the PUSCH, and the at least one information element corresponds to at least one time slot offset parameter respectively;

[0604] When there are at least two information elements, determine, through DCI signaling, the time slot offset parameter corresponding to one information element as the fourth time slot offset parameter.

[0605] In an embodiment, when the PUSCH transmission is triggered by DCI, the indication information is used to instruct the second communication node to transmit the PUSCH in a seventh target time slot, where the seventh target time slot is the time slot where the PDCCH is located or the (y + 1)-th available or valid downlink time slot or special time slot after the time slot corresponding to the fourth time slot offset association parameter, and y is 0 or a positive integer.

[0606] In an embodiment, y is determined by at least one of the following methods:

[0607] Configured through RRC signaling;

[0608] Equal to the fourth time slot offset parameter;

[0609] Configured through RRC signaling and the y corresponds to a CSI-RS trigger state;

[0610] The y corresponds to a control resource set;

[0611] The y corresponds to the time slot where the PDCCH scheduling the PDSCH is located;

[0612] The y is a predetermined value.

[0613] In an embodiment, the indication information includes a fifth time slot offset parameter, and the fifth time slot offset parameter corresponds to the time slot for transmitting the uplink signal;

[0614] The uplink signal includes a PUCCH associated with acknowledgment and non-acknowledgment information;

[0615] The indication information is used to instruct a second communication node to send a PUCCH for the associated acknowledgment and non-acknowledgment information.

[0616] In one embodiment, the first communication node is further configured to:

[0617] Configure at least one preset parameter through RRC signaling, where the preset parameter is used to configure the time domain relationship between the PDSCH and the PUCCH.

[0618] In one embodiment, the indication information is used to instruct the second communication node to send a PUCCH in an eighth target time slot, where the eighth target time slot is the time slot in which the PDSCH is located or the (x + 1)-th available or valid downlink time slot or special time slot after the time slot corresponding to the fifth time slot offset parameter, and x is 0 or a positive integer.

[0619] In one embodiment, x is determined by at least one of the following methods:

[0620] Configured through RRC signaling;

[0621] Equal to the fifth time slot offset parameter;

[0622] Configured through RRC signaling and x corresponds to a CSI-RS trigger state;

[0623] x corresponds to a control resource set;

[0624] x corresponds to the time slot in which the PDCCH scheduling the PDSCH is located;

[0625] x is a predetermined value.

[0626] The transmission device proposed in this embodiment and the transmission method proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be referred to any of the above embodiments, and this embodiment has the same beneficial effects as the execution of the transmission method.

[0627] An embodiment of the present application further provides a first communication node. The transmission method can be executed by a transmission device, which can be implemented in a software and / or hardware manner and integrated in the first communication node.

[0628] Figure 6 It is a schematic structural diagram of a first communication node provided in an embodiment. As Figure 6 shown, a first communication node provided in this embodiment includes: a processor 510 and a storage device 520. The processor in this first communication node can be one or more, Figure 6Taking a processor 510 as an example, the processor 510 and the storage device 520 in the device may be connected through a bus or other means. Figure 6 Taking the connection through a bus as an example.

[0629] The one or more programs are executed by the one or more processors 510, so that the one or more processors implement the transmission method described in any of the above embodiments.

[0630] The storage device 520 in the first communication node, as a computer-readable storage medium, can be used to store one or more programs. The programs can be software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the transmission method in the embodiments of the present invention (for example, the modules in the transmission device shown in the appendix Figure 4 shown, including: a sending module 310 and a first transmission module 320). The processor 510 executes various functional applications and data processing of the first communication node by running the software programs, instructions, and modules stored in the storage device 520, that is, implements the transmission method in the above method embodiments.

[0631] The storage device 520 mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the device (such as the indication information, uplink signal, etc. in the above embodiments). In addition, the storage device 520 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state storage devices. In some instances, the storage device 520 may further include a memory remotely provided relative to the processor 510, and these remote memories can be connected to the first communication node through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and combinations thereof.

[0632] Moreover, when one or more programs included in the first communication node are executed by the one or more processors 510, the following operations are implemented: sending indication information for indicating the second communication node to send an uplink signal or indicating the second communication node to receive a downlink signal; performing signal transmission with the second communication node according to the indication information.

[0633] The first communication node proposed in this embodiment and the transmission method proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be referred to in any of the above embodiments, and this embodiment has the same beneficial effects as those of the execution of the transmission method.

[0634] The embodiments of the present application further provide a second communication node. The transmission method can be executed by a transmission device, which can be implemented in a software and / or hardware manner and integrated in the second communication node.

[0635] Figure 7 FIG. 4 is a schematic structural diagram of a second communication node provided in an embodiment. As Figure 7 shown, a second communication node provided in this embodiment includes: a processor 610 and a storage device 620. The processor in the second communication node can be one or more. Figure 7 Taking one processor 610 as an example, the processor 610 and the storage device 620 in the device can be connected through a bus or other means. Figure 7 Taking the connection through the bus as an example.

[0636] The one or more programs are executed by the one or more processors 610, so that the one or more processors implement the transmission method described in any of the above embodiments.

[0637] The storage device 620 in the second communication node, as a computer-readable storage medium, can be used to store one or more programs. The programs can be software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the transmission method in the embodiments of the present invention (for example, the modules in the transmission device shown in Figure 5 FIG. 4, including: a receiving module 410 and a second transmission module 420). The processor 610 executes various functional applications and data processing of the second communication node by running the software programs, instructions, and modules stored in the storage device 620, that is, implements the transmission method in the above method embodiments.

[0638] The storage device 620 mainly includes a storage program area and a storage data area. Among them, the storage program area can store an operating system and application programs required for at least one function; the storage data area can store data created according to the use of the device (such as the indication information, uplink signal, etc. in the above embodiments). In addition, the storage device 620 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, or other non-volatile solid-state storage devices. In some instances, the storage device 620 can further include a memory remotely set relative to the processor 610, and these remote memories can be connected to the second communication node through a network. Examples of the above network include but are not limited to the Internet, enterprise intranets, local area networks, mobile communication networks, and their combinations.

[0639] Moreover, when one or more programs included in the second communication node are executed by the one or more processors 610, the following operations are implemented: sending indication information for indicating the second communication node to send an uplink signal or indicating the second communication node to receive a downlink signal; and performing signal transmission with the second communication node according to the indication information.

[0640] The second communication node proposed in this embodiment and the transmission method proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be referred to in any of the above embodiments, and this embodiment has the same beneficial effects as the execution of the transmission method.

[0641] An embodiment of the present application further provides a storage medium including computer-executable instructions, and the computer-executable instructions are used to execute a transmission method when executed by a computer processor.

[0642] Through the above description of the embodiments, those skilled in the art can understand that the present application can be implemented by means of software and general-purpose hardware, or can also be implemented by hardware. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a floppy disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (FLASH), a hard disk, or an optical disc of a computer, etc., including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in any embodiment of the present application.

[0643] The above is only an exemplary embodiment of the present application and is not intended to limit the protection scope of the present application.

[0644] Any block diagram of a logical process in the drawings of the present application may represent a program step, or may represent interconnected logical circuits, modules, and functions, or may represent a combination of program steps and logical circuits, modules, and functions. The computer program can be stored in a memory. The memory can have any type suitable for the local technical environment and can be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical memory devices and systems (digital versatile disc DVD or CD disc), etc. The computer-readable medium can include a non-transitory storage medium. The data processor can be any type suitable for the local technical environment, such as, but not limited to, a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (FPGA), and a processor based on a multi-core processor architecture.

[0645] By way of illustrative and non-limiting examples, a detailed description of exemplary embodiments of the present application has been provided above. However, various modifications and adaptations of the above embodiments will be apparent to those skilled in the art when considered in conjunction with the accompanying drawings and the claims, without departing from the scope of the present invention. Accordingly, the proper scope of the present invention will be determined in accordance with the claims.

Claims

1. A transmission method, comprising: Sending high-layer signaling, wherein the high-layer signaling configures a time slot offset parameter in an aperiodic sounding reference signal (SRS) resource set, wherein the time slot offset parameter indicates that the first time slot is the time slot (n + the time slot offset parameter), and wherein the downlink control information (DCI) triggering the aperiodic SRS resource set is sent in time slot n; Sending the DCI, wherein the DCI includes indication information of the aperiodic SRS resource set, and wherein the DCI is used to trigger a second communication node to send an uplink signal in the aperiodic SRS resource set in a target time slot, wherein the time slot (n + the time slot offset parameter) is not a valid time slot, the target time slot is the (k + 1)-th valid time slot after the first time slot, k is 0 or a positive integer, the high-layer signaling configures a plurality of candidate values of k in the aperiodic SRS resource set, the plurality of candidate values corresponding to a plurality of triggering states of the aperiodic SRS, wherein all time domain symbols occupied by all SRS resources in the aperiodic SRS resource set in the valid time slot are not downlink symbols, and the time interval between the physical downlink control channel (PDCCH) triggering the aperiodic SRS resource set and all SRS resources in the aperiodic SRS resource set meets a minimum time interval requirement; And Receiving the uplink signal.

2. The method according to claim 1, wherein, The high-layer signaling is radio resource control (RRC) signaling.

3. A transmission method, comprising: Receiving high-layer signaling, wherein the high-layer signaling configures a time slot offset parameter in an aperiodic sounding reference signal (SRS) resource set, wherein the time slot offset parameter indicates that the first time slot is the time slot (n + the time slot offset parameter), and wherein the downlink control information (DCI) triggering the aperiodic SRS resource set is sent in time slot n; Receiving the DCI, wherein the DCI includes indication information of the aperiodic SRS resource set, and wherein the DCI is used to trigger a second communication node to send an uplink signal in the aperiodic SRS resource set in a target time slot, wherein the time slot (n + the time slot offset parameter) is not a valid time slot, the target time slot is the (k + 1)-th valid time slot after the first time slot, k is 0 or a positive integer, the high-layer signaling configures a plurality of candidate values of k in the aperiodic SRS resource set, the plurality of candidate values corresponding to a plurality of triggering states of the aperiodic SRS, wherein all time domain symbols occupied by all SRS resources in the aperiodic SRS resource set in the valid time slot are not downlink symbols, and the time interval between the physical downlink control channel (PDCCH) triggering the aperiodic SRS resource set and all SRS resources in the aperiodic SRS resource set meets a minimum time interval requirement; And Sending the uplink signal according to the indication information.

4. The method according to claim 3, wherein The high-layer signaling is radio resource control (RRC) signaling.

5. A first communication node, comprising: At least one processor; And A storage device for storing at least one program; Wherein, when the at least one program is executed by the at least one processor, the at least one processor implements the following steps: Transmit a high-layer signaling, where the high-layer signaling configures a time slot offset parameter in an aperiodic sounding reference signal (SRS) resource set, where the time slot offset parameter indicates that the first time slot is the time slot (n + the time slot offset parameter), and the downlink control information (DCI) that triggers the aperiodic SRS resource set is transmitted on time slot n; Transmit the DCI, where the DCI includes indication information of the aperiodic SRS resource set, where the DCI is used to trigger a second communication node to transmit an uplink signal in the aperiodic SRS resource set at a target time slot, where the time slot (n + the time slot offset parameter) is not a valid time slot, the target time slot is the (k + 1)-th valid time slot after the first time slot, k is 0 or a positive integer, the high-layer signaling configures multiple candidate values of k in the aperiodic SRS resource set, the multiple candidate values correspond to multiple triggering states of the aperiodic SRS, where all time domain symbols occupied by all SRS resources in the aperiodic SRS resource set in the valid time slot are not downlink symbols, and the time interval between the physical downlink control channel (PDCCH) that triggers the aperiodic SRS resource set and all SRS resources in the aperiodic SRS resource set meets the minimum time interval requirement; And Receive the uplink signal.

6. The first communication node according to claim 5, wherein, The high-layer signaling is radio resource control (RRC) signaling.

7. A second communication node, comprising: At least one processor; And A storage device for storing at least one program; Wherein, when the at least one program is executed by the at least one processor, the at least one processor implements the following steps: Receive a high-layer signaling, where the high-layer signaling configures a time slot offset parameter in an aperiodic sounding reference signal (SRS) resource set, where the time slot offset parameter indicates that the first time slot is the time slot (n + the time slot offset parameter), and the downlink control information (DCI) that triggers the aperiodic SRS resource set is transmitted on time slot n; Receive the DCI, where the DCI includes indication information of the aperiodic SRS resource set, where the DCI is used to trigger a second communication node to transmit an uplink signal in the aperiodic SRS resource set at a target time slot, where the time slot (n + the time slot offset parameter) is not a valid time slot, the target time slot is the (k + 1)-th valid time slot after the first time slot, k is 0 or a positive integer, the high-layer signaling configures multiple candidate values of k in the aperiodic SRS resource set, the multiple candidate values correspond to multiple triggering states of the aperiodic SRS, where all time domain symbols occupied by all SRS resources in the aperiodic SRS resource set in the valid time slot are not downlink symbols, and the time interval between the physical downlink control channel (PDCCH) that triggers the aperiodic SRS resource set and all SRS resources in the aperiodic SRS resource set meets the minimum time interval requirement; And Transmit the uplink signal according to the indication information.

8. The second communication node according to claim 7, wherein, The high-layer signaling is radio resource control (RRC) signaling.

9. A computer-readable storage medium having a computer program stored thereon, and when the program is executed by a processor, the method described in any one of claims 1-4 is implemented.

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