Method and apparatus for reporting information and method and apparatus for transmitting information - Patents.com

Abstract

A method and apparatus for reporting information and a method and apparatus for transmitting information are provided that solve the problems of low flexibility and insufficient adaptability of beam-related information reporting. A method for beam-related information reporting includes receiving, by a second communication node, a reference signal from a first communication node to determine a reference signal-related index and / or channel state information, and reporting, by the second communication node, a set to the first communication node. The set includes at least one of the reference signal-related index and the channel state information. The second communication node reports its own capabilities, so that the first communication node can indicate a beam report that matches user capabilities, thereby improving the stability of the beam-related information reporting.

Description

[Technical field]

[0001] <CROSS REFERENCE TO RELATED APPLICATIONS> This patent application claims the benefit of Chinese Patent Application No. 201710687945.9, filed on August 11, 2017, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of communications, and more particularly, to a method and apparatus for information reporting and a method and apparatus for information transmission. [Background technology]

[0003] In the prior art, ultra-wideband radio frequency (UWHF) (i.e. mmWave communication) has become the key to the future development of mobile communication and has attracted attention from academic and industrial circles around the world. In particular, the advantages of mmWave communication are becoming more and more attractive due to the increasingly congested spectrum resources and the physical network with increased access. Many standardization organizations such as IEEE and 3GPP have started standardization work. For example, in the 3GPP standard, high frequency communication will be a key innovation point of 5G New Radio Access Technology (New RAT) because its high bandwidth has significant advantages.

[0004] However, high frequency communication also faces the challenge of link attenuation, more specifically, high propagation path loss, greater atmospheric absorption (especially oxygen), and heavy rain attenuation. In the face of these challenges, high frequency communication systems are able to take advantage of shorter wavelengths and easier antenna integration, and can achieve high antenna gain and counter signal transmission loss through multi-antenna arrays and beamforming methods to ensure link margins and improve communication robustness.

[0005] The training of antenna weights (i.e., precoding or beam) involves a high-frequency transmitting end transmitting a training pilot and a receiving end receiving the signal and performing channel estimation. The high-frequency receiving end informs the side transmitting the training pilot of channel state information (CSI), so that the transmitting end and the receiving end can determine multiple antenna weight pairs from the candidate antenna weight pairs required for multipath data transmission, thereby improving the spectral efficiency.

[0006] In a conventional millimeter wave communication system, the beam-related information feedback includes multiple beam numbers and corresponding channel qualities (e.g., SINR, or RSRP) under the maximum channel quality to generate corresponding beam pairs for data transmission. However, the beam receiving capability and the beam transmitting capability vary among different users or base station characteristics, and the beam receiving characteristics and the beam transmitting characteristics vary among different physical panels. In addition, the movement of equipment and the selection of users may require only a part of the beams to be updated. The method of the related art can only report the maximum value of a limited number of beams, and cannot flexibly support beam measurement and grouping, and beam tracking and status reporting among different types of UEs, and different transmission requirements.

[0007] Prior art technical approaches do not provide a method for beam-related information reporting that supports multiple types of base stations and user capabilities and scenarios.

[0008] Currently, there is no effective solution that can solve the problem of low flexibility and low adaptability of beam-related information reporting in the prior art. Summary of the Invention [Means for solving the problem]

[0009] According to an embodiment of the present disclosure, a method and apparatus for information reporting, and a method and apparatus for information transmission are provided, which at least solve the problems of low flexibility and insufficient adaptability of beam-related information reporting in the prior art.

[0010] According to an embodiment of the present disclosure, there is provided a method for information reporting, the method comprising: receiving, by a second communication node, a reference signal from a first communication node to determine a reference signal related index and / or channel state information; reporting, by the second communication node, a set to the first communication node, the set including at least one of the reference signal related index or the channel state information.

[0011] According to an embodiment of the present disclosure, there is provided a method for information transmission, the method comprising: determining, by a second communication node, reference signal resource related information to be transmitted to a first communication node; and transmitting the related information to the first communication node.

[0012] According to another embodiment of the present disclosure, an apparatus for information reporting, applicable in a second communication node, is provided, comprising: a first receiving module configured to receive a reference signal from a first communication node and determine a reference signal related index and / or channel state information; a reporting module configured to report a set to the first communication node, the set including at least one of a reference signal related index or channel state information;

[0013] According to another embodiment of the present disclosure, an apparatus for information transmission, applicable in a second communication node, is provided, comprising: a determining module configured to determine reference signal resource related information to be transmitted to a first communication node; a first transmitting module configured to transmit the related information to the first communication node;

[0014] According to another embodiment of the present disclosure, an apparatus for information reporting, applicable in a first communication node, is provided, comprising: a second transmitting module configured to transmit reference information to a second communication node, the second transmitting module configured to determine a reference signal related index and / or channel state information according to the reference signal; a second receiving module configured to receive a set reported by the second communication node, the set including at least one of a reference signal related index or channel state information;

[0015] According to another embodiment of the present disclosure, there is provided a storage medium having stored thereon a program which, when executed, performs any one of the methods according to the alternative embodiments described above.

[0016] According to another embodiment of the present disclosure, there is provided a processor for executing a program which, when executed, performs any one of the methods according to the alternative embodiments described above.

[0017] According to the present disclosure, a second communication node receives a reference signal from a first communication node to determine a reference signal-related index and / or channel state information, and the second communication node reports a set to the first communication node, the set including at least one of the reference signal-related index or the channel state information. This technical solution solves the problem of low flexibility and low adaptability of beam-related information reporting in the related art, and the second communication node reports its own capability, so that the first communication node can indicate a beam report that matches user capability, thereby improving the stability of beam-related information reporting. [Brief description of the drawings]

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure. The exemplary embodiments and their description are set forth by way of example and should not be construed as limiting the scope of the present disclosure.

[0019] [Figure 1] 2 is a flow chart illustrating a method for reporting information according to an embodiment of the present invention.

[0020] [Diagram 2] 1 is a schematic structural diagram of a hybrid precoding (hybrid analog-digital beamforming) transceiver according to an embodiment of the present disclosure;

[0021] [Diagram 3] FIG. 2 is a schematic diagram illustrating reference signal transmission and channel-related information feedback according to a preferred embodiment of the present disclosure.

[0022] [Figure 4] FIG. 2 is a schematic diagram illustrating a base station for indicating a group index to a user according to a preferred embodiment of the present invention;

[0023] [Diagram 5] FIG. 13 is a schematic diagram illustrating a beam report with a reporting configuration according to a preferred embodiment of the present disclosure.

[0024] [Figure 6] FIG. 2 is a schematic diagram illustrating a code division multiplexing (CDM) antenna port according to a preferred embodiment of the present disclosure.

[0025] [Figure 7] A schematic diagram showing uplink and downlink reference signal grouping in the beam-enabled case according to a preferred embodiment of the present disclosure.

[0026] [Figure 8] A schematic diagram showing uplink reference signal grouping in the non-beam-enabled case according to a preferred embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] An embodiment of the present disclosure provides a mobile communication network (including but not limited to a 5G network), and the network structure of the network can include a network side device (e.g., a base station) and a terminal. According to an embodiment, a method for information transmission operable on the network structure is provided. It should be noted that the method according to the present embodiment can also operate in other operating environments.

[0028] In the present disclosure, the first communication node is, for example, a base station side device (in other words, a reference signal transmitting end or transmitting end), and the second communication node is, for example, a terminal side device (in other words, a reference signal receiving end or receiving end). Of course, the first communication node may be a terminal device, in which case the solution according to the embodiment of the present disclosure is applied to Device to Device (D2D) communication.

[0029] <Embodiment 1>

[0030] According to this embodiment, an information reporting method operable at a base station side in the above network configuration is provided. Figure 1 is a flowchart illustrating an information reporting method according to an embodiment of the present invention. As shown in Figure 1, the method includes:

[0031] In S102, receiving, by the second communication node, a reference signal from the first communication node, to determine a reference signal related index and / or channel state information;

[0032] At S104, a set including at least one of a reference signal related index or channel state information is reported by the second communication node to the first communication node.

[0033] Through the above steps, the second communication node receives a reference signal from the first communication node to determine a reference signal-related index and / or channel state information, and the second communication node reports a set to the first communication node, the set including at least one of a reference signal-related index or channel state information. This technical solution solves the problem of low flexibility and low adaptability of beam-related information reporting in the related art, and the second communication node reports its own capability, so that the first communication node can indicate a beam reporting that matches the user capability, thereby improving the stability of the beam-related information reporting.

[0034] In an embodiment, the set includes Q groups, and each group can include at least one of the following: a group index, a reference signal related index, and channel state information. The reference signal related index can include at least one of the following: a reference signal configuration index, a reference signal resource set index, a reference signal resource index, a reference signal port index, a measurement restriction window index, a time-frequency window index, and a reporting configuration index. The channel state information can include at least one of the following: a Channel Quality Indicator (CQI), a Rank Indication (RI), a Reference Signal Receiving Power (RSRP), a Precoding Matrix Indicator (PMI), and phase information (co-phasing). Q is an integer equal to or greater than 1.

[0035] In an embodiment, the second communication node receives configuration information for reporting the set. The configuration information may include at least one of the following: a group index corresponding to a group, or a subset of group indexes corresponding to a group, where the group index corresponding to a group or the subset of group indexes corresponding to a group is a subset of a set of group indexes; grouping constraint information; grouping conditions; and reference signal configuration.

[0036] In an embodiment, the grouping constraint information includes at least one of the following: number of groups; a relative or absolute threshold for determining whether the second communication node reports a set in the measurement metric; the Xth strongest beam grouping in the measurement metric; the first Y beam groupings in order of strongest in the measurement metric. X is an integer equal to or greater than 1, or X is a set of positive integers equal to or greater than 1, where X is configured or pre-configured by the first communication node. Y is an integer equal to or greater than 1. It should be noted that the metrics can include at least one of BLER, CQI, received signal power, RSRP, RSRQ, channel capacity, signal-to-noise ratio at the receiving end, and signal-to-noise ratio at the receiving end.

[0037] In an embodiment, the set of group indices is configured by the first communication node.

[0038] In an embodiment, if the configuration information includes a subset of group indexes corresponding to the groups, the second communication node reports the set by using one of the grouping information, which includes: an index in the subset of group indexes corresponding to the groups; an index obtained by renumbering an index in the subset of group indexes corresponding to the groups. Alternatively, if the configuration information includes a subset of group indexes corresponding to the groups, the second communication node does not report information of the group indexes when reporting the set.

[0039] In an embodiment, the grouping conditions include at least one of the following: reference signals in the same group cannot be received at the second communication node simultaneously, or reference signals in the same group can be received at the second communication node simultaneously; reference signals in different groups can be received at the second communication node simultaneously, or reference signals in different groups cannot be received at the second communication node simultaneously; reference signals in each group cannot be multiplexed, or reference signals in each same group can be multiplexed; reference signals in different groups cannot be multiplexed, or reference signals in different groups can be multiplexed; reference signals in each group cannot be transmitted by the first communication node simultaneously, or reference signals in each group can be transmitted by the first communication node simultaneously. The grouping conditions include a first level grouping condition, or a first and second level grouping condition for a two-level grouping, or a kth level grouping condition for a K-level grouping, where K and k are integers equal to or greater than 1, and K is equal to or greater than k.

[0040] In an embodiment, before the second communication node receives a reference signal from the first communication node, the method includes the following steps: transmitting at least one of the following from the second communication node to the first communication node: grouping conditions supported by the second communication node; number of transceiver units (TXRUs) in the group; number of TXRUs of reference signal related indexes in the group; maximum number of layers in the group; maximum number of layers of reference signal related indexes in the group; number of groups reported or set of groups reported; maximum number of groups supported; maximum number of layers of the second communication node; number or maximum number of simultaneously measured reference signal resources or antenna ports; time domain repetition number of reference signal resources under measurement constraint or in a time-frequency measurement window; number of time domain units occupied by reference signal resources under measurement constraint or in a time-frequency measurement window. The maximum number of layers of the communication node may be the number of radio frequency links of the device; the number or maximum number of simultaneously measured reference signal resources or antenna ports represents the ability to simultaneously receive different transmission beams (number of panels), and the time domain repetition number of reference signal resources corresponds to the number of measured receiving beams.

[0041] In an embodiment, the time domain unit includes one of the following: (M / N) of Orthogonal Frequency Division Multiplexing (OFDM) symbols, an OFDM symbol, a slot, or a subframe, where M and N are integers equal to or greater than one.

[0042] In an embodiment, the second communication node supports at least one of the following modes: Transmitting RSRP and RI in the same report format, slot, subframe, or slot / subframe bundling element; Transmitting RSRP and PMI in the same report format, slot, subframe, or slot / subframe bundling element; Transmitting RSRP and Co-phasing in the same report format, subframe or slot / subframe bundling element; Transmit RSRP and CQI in different report formats.

[0043] In an embodiment, the step of reporting the set by the second communication node to the first communication node includes: a step of reporting the first type of report information and the second type of report information to the first communication node by the second communication node; and a step of preferentially transmitting the first type of report information based on a preset rule or preferentially transmitting the second type of report information based on a preset rule when the first type of report information and the second type of report information conflict with each other. The first type of report information includes at least an RSRP report, and the second type of report information includes at least one of the following reports: RI, PMI, co-phasing, and CQI.

[0044] In an embodiment, the step of reporting the set by the second communication node to the first communication node includes: reporting a reference signal related index by the second communication node to the first communication node, where the reference signal related index reported by the second communication node is associated with a channel quality (or a channel quality deterioration rate) that satisfies a first specified condition, or the reference signal related index is configured to request the first communication node to transmit a reference signal having channel characteristics, and the channel characteristics satisfy a reference signal channel characteristic requirement indicated by the reference signal related index. The channel characteristic requirement may include one of the following: QCL, spatial reception parameter requirement.

[0045] In an embodiment, the step of reporting the reference signal related index by the second communication node is triggered by the first communication node or by the second communication node satisfying a second prescribed condition.

[0046] In an embodiment, the first specified condition includes at least one of the following: the channel quality associated with the reference signal related index is lower than a predefined or configured threshold; the difference between the channel quality associated with the reference signal related index and the best reference signal quality measured at the second communication node is lower than a predefined or configured threshold; the difference between the channel quality associated with the reference signal related index and the average of the N best reference signal qualities is lower than a predefined or configured threshold; the difference between the channel quality associated with the reference signal related index and the cell signal quality is lower than a predefined or configured threshold.

[0047] In an embodiment, the channel quality is an average, maximum, minimum, or weighted average of the channel quality over one or more time windows.

[0048] In an embodiment, the reference signal includes one or more reference signal resources, and antenna ports of the same reference signal resource meet a predetermined channel characteristic requirement or antenna ports of the same reference signal resource do not meet a predetermined channel characteristic requirement.

[0049] In an embodiment, whether antenna ports of the same reference signal resource satisfy a channel characteristic requirement is configured by the first communication node for the second communication node; or is determined by the second communication node according to a graph of the reference signal, a code division scheme of the reference signal, or the number of antenna ports of the reference signal.

[0050] In an embodiment, when the antenna ports of the same reference signal resource meet the channel characteristic requirement, the set of reference signal related indexes and channel state information at least includes a reference signal resource index. When the antenna ports of the same reference signal resource do not meet the channel characteristic requirement, the set of reference signal related indexes and channel state information at least includes a reference signal port index, a reference signal port index, and a reference signal resource index.

[0051] In an embodiment, when antenna ports of the same reference signal resource are code division multiplexed, the spatial reception parameters of the antenna ports satisfy the quasi-co-located (QCL) assumption.

[0052] In an embodiment, the reference signal is used to suggest to the second communication node to report a set of reference signal related indexes and channel state information after X time elements following the reference signal are configured by the first communication node or after X time elements following the second communication node's acknowledgment, the time elements being, for example, at least one of an OFDM symbol, a slot, and a subframe.

[0053] According to another embodiment of the present disclosure, a method for transmitting information is provided, the method including: Step 1: determining reference signal resource related information to be transmitted by a second communication node to a first communication node; Step 2: Send the relevant information to the first communication node.

[0054] In an embodiment, the reference signal resource related information includes at least one of the following: grouping related information; a maximum number of layers in a group; a maximum number of layers in an uplink reference signal; a maximum number of layers in a downlink reference signal; uplink reference signal capability information; uplink or downlink reference signal capability information of a first group, where the first group is configured by a first communication node or reported by a second communication node; uplink or downlink reference signal configuration request information of a second group, where the second group is configured by the first communication node or reported by a second communication node; uplink reference signal configuration request information corresponding to an uplink reference signal related index or downlink reference signal configuration request information corresponding to a downlink reference signal related index, where the uplink reference signal resource related information is a group of uplink reference signal configuration request information. uplink or downlink reference signal configuration request information, where an uplink or downlink reference signal related index is configured by the first communications node or reported by the second communications node; uplink reference signal configuration request information in the case where a spatial filter the same or similar to that used for the uplink reference signal is used, or downlink reference signal configuration request information in the case where a spatial filter the same or similar to that used for the downlink reference signal is used, where the uplink or downlink reference signal is configured by the first communications node or reported by the second communications node, and the reference signal related index includes at least one of the following: a reference signal configuration index, a reference signal resource set index, a reference signal resource index, a reference signal port index, a measurement restriction window index, a time-frequency window index, a reporting configuration index.

[0055] In an embodiment, the uplink reference signal includes at least one of the following: an uplink demodulation reference signal (UL DMRS), a sounding reference signal (SRS), a phase tracking reference signal (PTRS).

[0056] In an embodiment, the second communication node groups the uplink reference signals according to at least one of the following grouping conditions: Different reference signals within the same group may not be transmitted simultaneously or the second communication node does not prefer or support different reference signals within the same group being presented for the same transmission; More than P different reference signals in the same group cannot be transmitted simultaneously, or the second communication node does not prefer or support presenting more than P different reference signals in the same group for the same transmission; Different reference signals in the same group may be transmitted simultaneously or the second communication node supports presenting different reference signals in the same group in the same transmission; The different reference signals in the different groups may not be transmitted simultaneously or the second communication node does not prefer or support presenting different reference signals in different groups for the same transmission; More than Q reference signals in different groups cannot be transmitted simultaneously or the second communication node does not prefer or support presenting more than Q different reference signals in different groups for the same transmission; Reference signals in different groups may be transmitted simultaneously, or the second communication node supports presenting different reference signals in different groups for the same transmission; P and Q are integers greater than or equal to 1.

[0057] In an embodiment, the second communication node notifies P or Q to the first communication node.

[0058] In an embodiment, the same transmission refers to transmissions of different reference signals that occur simultaneously at least at one given time.

[0059] In an embodiment, the uplink reference signal configuration related signaling received by the second communication node includes group index indication information.

[0060] In an embodiment, the second communication node transmits an uplink reference signal according to the group index indication information.

[0061] In an embodiment, the grouping related information includes at least one of the following: a group index, an uplink reference signal resource index, an uplink reference signal resource set index, an uplink reference signal resource antenna port index, and a window index. The group index includes at least one of the following: an uplink group index, and a downlink group index. It should be noted that in the case of beam support, the uplink grouping can inherit the downlink grouping characteristics.

[0062] In an embodiment, the uplink reference signal configuration request information includes at least one of the following: a type of uplink reference signal, a number of antenna ports of the uplink reference signal resource, a number of uplink reference signal resources, and a number of uplink reference signal resource sets.

[0063] In an embodiment, the uplink reference signal capability information includes at least one of the following: the number of TXRUs; the maximum number of antenna ports for uplink reference signal resources; the maximum number of layers; the number of groups to be signaled or a set of numbers of groups to be signaled; the maximum number of groups to be supported; the number or maximum number of reference signal resources or antenna ports that may be transmitted simultaneously; the number or maximum number of uplink reference signal resources; and the time domain repetition number of uplink reference signal resources.

[0064] According to another embodiment of the present disclosure, a method for information reporting is provided, the method including: Step 1: sending reference information by a first communication node to a second communication node, and the second communication module determines a reference signal related index and / or channel state information according to the reference signal; Step 2: Receive a set reported by a second communication node, the set including at least one of a reference signal related index and channel state information.

[0065] Preferred embodiments of the present disclosure will now be described in detail.

[0066] Before describing the preferred embodiments, the technical terms used in this disclosure will be explained as follows:

[0067] The reference signal includes at least one of the following: a cell reference signal (CRS), a channel state information reference signal (CSI-RS), a channel state information reference signal for beam management, a channel state information interference measurement signal (CSI-IM), a demodulation reference signal (DMRS), a downlink demodulation reference signal, an uplink demodulation reference signal, a channel sounding reference signal (SRS), a phase tracking reference signal (PT-RS), a motion related reference signal (MRS), a beam reference signal (BRS), a beam refinement reference signal (BRRS), a random access channel signal (RACH), a synchronization signal (SS), a synchronization signal block (SS block), a primary synchronization signal (PSS), and a secondary synchronization signal (SSS).

[0068] The identity indication includes, but is not limited to, the following: Media Access Control (MAC) address, Cell Radio Network Temporary Indication (C-RNTI), temporary C-RNTI (TC-RNTI), a dedicated identity assigned by the base station to the UE.

[0069] Grouping beam-related information refers to dividing beams and associated channel state information into sets that have the same channel characteristics and / or transmission schemes. The channel characteristics include physical propagation channel characteristics such as quasi-collocation (QCL), horizontal transmit tilt angle, vertical transmit tilt angle, horizontal receive tilt angle, vertical receive tilt angle, etc., as well as element patterns, antenna arrangements, and radio frequency and baseband circuit characteristics such as baseband time offset, frequency offset, and phase noise.

[0070] A group is sometimes called a set.

[0071] A beam may be a resource (e.g., outgoing precoding, incoming precoding, antenna port, antenna weight vector, antenna weight matrix). The beam sequence number and resource index are interchangeable because a beam can be bound to several time-frequency code resources for transmission. A beam may be a transmission (transmit / receive) scheme, which may include spatial division multiplexing, frequency / time domain diversity, etc.

[0072] Receive beam notification means that the transmitting end can notify by using the current reference signal and antenna port, the reference signal reported by the UE (i.e., the standard reference signal), and the quasi-collocation (QCL) assumption of the antenna port.

[0073] A receive beam refers to a beam at the receive end that does not require notification, or a beam resource at the receive end, that the transmit end can notify by using the current reference signal and antenna port, as well as the quasi-collocation (QCL) assumption of the reference signal (i.e., the standard reference signal) and antenna port reported by the UE.

[0074] The channel state information includes at least a precoding matrix indicator (PMI), a channel quality indicator (CQI), a reference signal received power (RSRP), a reference signal received quality (RSRQ), a rank indicator (RI), and so on.

[0075] The quasi-collocation (QCL) parameters include at least Doppler spread, Doppler shift, delay spread, average delay, and average gain, and may also include spatial parameters or spatial reception parameters such as angle of arrival, spatial correlation of receive beams, average delay, correlation of time-frequency channel responses (including phase information).

[0076] FIG. 2 is a schematic structural diagram of a hybrid precoding (analog-digital hybrid beamforming) transceiver according to one embodiment of the present disclosure. A multi-antenna unit and multiple radio frequency links are configured at the transmitting end and receiving end of the system. Each RF link is connected (including partially connected) to an antenna array unit, and each antenna unit includes a digital keying phase shifter. The high-frequency system realizes analog beamforming by applying different phase shifts to the signals of different antenna units. In particular, there are multiple RF signal streams in the hybrid beamforming transceiver. Each signal stream is applied with an antenna weight vector (AWV) by the digital keying phase shifter, and is transmitted from the multi-antenna unit to a high-frequency physical propagation channel. At the receiving end, the RF signal streams received by the multi-antenna unit are weighted and combined into a single signal stream. The receiving end performs radio frequency demodulation, and the receiver finally obtains multiple receive streams, which are digitally baseband sampled and received. Thus, a hybrid precoding (analog-digital hybrid beamforming) transceiver can simultaneously generate multiple directional radio frequency beams.

[0077] At the same time, the transmitting end and receiving end of the system can support better spatial division multiplexing and reduce the complexity of hardware implementation by having multiple panels. Therefore, on each panel, the number of effective beams is asymmetric with the maximum number of beams actually supported, i.e., at any time, the number of transmittable beams (the number of TXRUs) is significantly less than the number of candidate beams. In this case, the user must inform the base station of its downlink and uplink capabilities.

[0078] From a downlink perspective, the base station first transmits reference signals to the user terminals, which then group reference signal-related index information (e.g., CSI-RS resource indicators, CRIs) according to their capabilities, e.g., in the form of {group index, {CRI1, channel state information}, ..., {CRIx, channel state information}}, ...

[0079] Specifically, the reference signal related index includes at least one or a combination of the following: reference signal configuration index, reference signal resource set index, reference signal resource index, reference signal port index, measurement restriction window index, time-frequency window index, and reporting configuration index. For example, when using CSI, it can be CSI resource configuration ID+CSI resource set ID+CRI+MR window ID. Table 1 below is a schematic table showing beam grouping according to a preferred embodiment. [Table 1]

[0080] The group index may be included in the grouped report, i.e., may be implicit according to a predefined rule, which may include, for example, reporting in an order and group format explicitly configured by the base station. In this way, the group index in the report may be implicitly obtained.

[0081] 3 is a schematic diagram showing reference signal transmission and channel related information feedback according to a preferred embodiment of the present disclosure. Specifically, a reference signal transmitting end (for example, a base station end, a first communication node in the above embodiment) transmits downlink reference signal allocation information to a reference signal receiving end (for example, a user terminal, a second communication node in the above embodiment), and then transmits a downlink reference signal. The user terminal performs signal processing, and when triggered by receiving a report format configuration, the user terminal reports back a set of reference signal related indexes and channel state information to the transmitting side.

[0082] For reference signal grouping or beam grouping, the grouping conditions include one or a combination of the following: reference signals in the same group cannot be received simultaneously, reference signals in different groups can be received simultaneously, reference signals in different groups can be received simultaneously, reference signals in different groups cannot be received simultaneously, reference signals in the same group cannot be multiplexed, reference signals in the same group can be multiplexed, reference signals in different groups cannot be multiplexed, reference signals in different groups cannot be transmitted simultaneously, reference signals in the same group can be transmitted.

[0083] For example, the reference signal transmitting end can notify reference signal grouping according to the following rules {3, 4, 6}: {reference signals in the same group can be received simultaneously, reference signals in the same group cannot be multiplexed, and reference signals in different groups cannot be received simultaneously}.

[0084] This means that reference signals in the same group can be used simultaneously by the base station and can be spatial division multiplexed. From the implementation point of view, each group corresponds to a combination of reference signals that can be seen by each panel-TXRU in the user terminal panel-TXRU group. Depending on the receiving mode, the user can effectively arrange the reference signals with relatively small crosstalk, and it is easy to transmit the whole simultaneously. Based on this grouping information, the base station can clearly guide the resource scheduling. It should be noted that due to the restrictions on the UE's capabilities, the UE can inform the base station end of the grouping conditions or combinations of grouping conditions that the UE supports, and the base station end can determine the appropriate grouping criteria according to the capabilities informed by the UE.

[0085] Grouping criteria may be applied to multiple levels, including, for example, first level grouping criteria, or first and second level grouping criteria for a two-level grouping, or kth level grouping criteria for a K-level grouping, where K and k are integers greater than or equal to 1 and K is greater than or equal to k.

[0086] FIG. 4 is a schematic diagram showing a base station notifying a group index to a user according to a preferred embodiment of the present disclosure. The base station may also notify a group index corresponding to a group or a subset of group indexes corresponding to a group in a reporting configuration to specify a specific group for feedback. The group index corresponding to a group or the subset of group indexes corresponding to a group is a subset of the set of group indexes. Furthermore, the set of group indexes may be configured by the base station to represent specific characteristics of each group for clear grouping notification. For example, the system may support user grouping feedback based on an index configured by the base station, and may support user group feedback without an index configured by the base station. In the absence of an index configured by the base station, the user may perform grouping feedback, and the base station may remap the reported group index and notify the user terminal.

[0087] FIG. 5 is a schematic diagram illustrating beam reporting with a reporting configuration according to a preferred embodiment of the present disclosure.

[0088] In the reporting configuration, if the base station indicates a subset of group indexes corresponding to a group, the grouping information used for reporting includes an index in the subset or an index obtained by renumbering the index in the subset. For example, if the original index is {1, 4, 7, 9} and the renumbered index is {0, 1, 2, 3}, the user reports the renumbered index. If the base station indicates a group index corresponding to a group, the user does not report the group index.

[0089] According to the predetermined or user end reported grouping conditions and the number of groups that can be supported, the base station end can negotiate with the user the grouping global index information. Based on the grouping global index information, the base station can notify only a part of the grouping information it indicates in each report. In this way, unnecessary beam reporting overhead can be effectively avoided, and from the standardization point of view, the number of groups supported by each report can be less than the number of groups supported by the standard. The base station can specify a part of the groups for feedback according to the channel quality, the BLER condition, the user feedback, and self-scheduling.

[0090] Furthermore, the base station end can define constraint information in the beam report that the grouping must satisfy, including at least one of the following: the number of groups to be reported or the maximum number of groups that can be reported; A relative or absolute threshold for determining whether to report on a measurement metric, i.e., if the measurement metric is lower than the threshold, the UE does not need to report the grouping; or The Xth strongest beam grouping in the measurement metric; or Grouping of Y beams in order of their strength in the measurement metric, X is an integer equal to or greater than 1, or a set of positive integers equal to or greater than 1, and X is configured by the reference signal transmitting terminal or based on a predetermined rule; Y is an integer greater than or equal to 1; The measurement metrics may include at least one of: BLER, CQI, received signal power, RSRP, RSRQ, channel capacity, signal to noise ratio at the receiving end, signal to noise ratio at the receiving end.

[0091] Considering that the beam information reflects the reference signal correlation index, the reporting configuration of the beam report needs to be associated with a reference signal set, called a reference signal configuration. It should be noted that the reference signal set may correspond to information such as reference signal resource, reference signal resource set, and reference signal antenna port configuration. Thus, the beam report can include reports of the same set of reference signals under various reporting configurations (e.g., grouping conditions, notification of group index of grouping), so that the reference signal configuration is actually in the reference signal configuration set, and the user can select one or more reference signals from the reference signal set for feedback.

[0092] To support group reporting, the reference signal receiver informs the reference signal transmitter of its capabilities, including:

[0093] 1) Supported grouping conditions;

[0094] 2) the number of TXRUs in the group;

[0095] 3) the number of TXRUs of reference signal related indexes in the group;

[0096] 4) Maximum number of layers in a group;

[0097] 5) the maximum number of layers of reference signal-related indexes in a group;

[0098] 6) the number of groups reported, or a set of numbers of groups reported;

[0099] 7) Maximum number of groups supported;

[0100] 8) Maximum number of layers;

[0101] 9) The number or maximum number of reference signal resources or antenna ports that are measured simultaneously;

[0102] 10) the time-domain repetition number of the reference signal resource under the measurement constraint or within the time-frequency measurement window;

[0103] 11) The number of time domain units used by the reference signal resource under the measurement constraint or within the time-frequency measurement window.

[0104] Time domain units include: (M / N) of Orthogonal Frequency Division Multiplexing (OFDM) symbols, OFDM symbols, slots, and subframes, where M and N are integers greater than or equal to 1.

[0105] The simultaneously measured reference signal resources or antenna ports have different QCL assumptions for different transmit beams. Therefore, the number or maximum number of simultaneously measured reference signal resources or antenna ports represents the UE's ability to simultaneously receive different transmit beams, i.e., the number of panels. However, under the measurement constraint or in the time-frequency measurement window, the time-domain repetition number of the reference signal resource or the number of time-domain units used by the reference signal resource corresponds to the number of receiving end beams measured by the UE. Since all beam-related measurements are performed while transmitting and receiving beams, the user needs to inform the transmitting end of its ability to simultaneously transmit beams and the requirements of the receiving beams to be measured.

[0106] The user capabilities or capability sets are either signaled by the reference signal sending end or pre-configured.

[0107] The user capability or capability set may be transmitted before the reference signal related index and the set of channel state information; or

[0108] The user capabilities or capability sets may be transmitted in the same format, subframe or subframe group as the reference signal related index and the set of channel state information, or may be transmitted after the reference signal related index and the set of channel state information.

[0109] Channel state information-related information may have a specific report format since it can include various types of state information. As an important indicator of beam characteristics, RSRP represents the channel quality strength (i.e., simple SISO) on the current link, but cannot represent the capability on MIMO transmission. Therefore, the system needs to support at least one of the following modes or their combinations:

[0110] 1) RSRP and RI are transmitted in the same report format, slot, subframe, or slot / subframe bundling element.

[0111] The RSRP and RI are transmitted to provide the received signal strength and the number of RIs supported under the reference signal indicated in the report. The number of RIs represents the restriction on the user end capabilities (e.g., the ability to support RIs) and also represents the support of the channel.

[0112] 2) RSRP and PMI are transmitted in the same report format, slot, subframe, or slot / subframe bundling element.

[0113] The RSRP and PMI are transmitted to provide the received signal strength and the number of recommended precoding matrix indicators (PMIs) under the reference signal indicated in the reporting. One reference signal resource, i.e., CSI-RS resource, can support multiple antenna ports, so that the user can obtain the recommended PMI from the measurement result of the reference signal.

[0114] 3) RSRP and Co-phasing are transmitted in the same report format, subframe, or slot / subframe bundling element.

[0115] Co-phasing can be seen as a simplified version of PMI, i.e., when the CSI-RS resources only support two antenna ports (default I and Q paths), co-phasing can be reported together with the RSRP to directly report the PMI to be used for future data transmissions to the transmitting terminal.

[0116] 4) RSRP and CQI are transmitted in different report formats.

[0117] In practice, beam reports using RSRP may collide with general CSI acquisition transmissions without RSRP, and thus prioritization of reports is required. When a collision occurs between the first type of report information and the second type of report information, the first type of report may be preferentially transmitted based on a preset rule, or the second type of report may be preferentially transmitted based on a preset rule.

[0118] The first type of report includes at least: an RSRP report.

[0119] The second type of report includes at least one of an RI, a PMI, a cophasing, and a CQI report.

[0120] The reference signal transmitting end may be configured in a low priority transmission mode. That is, the reference signal receiving end will only beam report after the measurement condition of the reference signal meets the reference signal quality condition. The reference signal quality condition and the uplink transmission resource may be configured for the reference signal receiving end by the reference signal transmitting end. In addition to when the channel quality corresponding to the reference signal is lower than a threshold, when the channel quality corresponding to the reference signal is greater than a threshold (configurable by the base station) or when the grouping situation changes, the reference signal receiving end can use a designated uplink resource (e.g., a scheduling-free uplink resource) to report, for example, grouping information. Furthermore, in addition to the reference signal quality condition (referred to as the first condition), the reference signal receiving end transmits a reference signal-related index with another condition (referred to as the second condition) related to the resource configuration and the receiver state or mode. For example, the base station side sets the time-frequency resource required for transmitting information, the window in which the time-frequency resource comes, and the synchronization state of the reference signal receiving end.

[0121] The reference signal receiving end may also request the reference signal transmitting end to transmit a reference signal that satisfies a reference signal channel characteristic requirement among the reference signals indicated by the reference signal related index in the report. This action may be performed by the base station notifying the user to report, or may be dynamically initiated by the user when the reference signal quality condition is satisfied. The channel characteristic requirement includes one of the following: QCL, channel characteristic requirement. The request may be triggered by the reference signal transmitting end, or may be sent by the reference signal receiving end according to the condition.

[0122] In summary, the conditions include one or a combination of the following:

[0123] 1) below a predefined or set threshold;

[0124] 2) the difference from the best reference signal quality is less than a predefined or configured threshold;

[0125] 3) the difference from the average of the N best reference signal qualities is less than a predefined or configured threshold;

[0126] 4) The difference with the cell signal quality is less than a predefined or set threshold.

[0127] The channel quality may be an average, a maximum, a minimum, or a weighted average over one or more time windows.

[0128] The reference signal includes one or more reference signal resources, and the antenna ports of the same reference signal resource meet the spatial reception parameter QCL characteristic, or the antenna ports of the same reference signal resource do not meet the spatial reception parameter QCL characteristic. Whether the antenna ports of the same reference signal resource meet the spatial reception parameter QCL characteristic can be configured by the reference signal transmitting end for the reference signal receiving end, or can be assumed according to a prescribed method (e.g., based on a graph, a code division scheme, or the number of antenna ports of the reference signal). For example, if the number of antenna ports is less than two, it can be assumed that the antenna ports of the same reference signal resource meet the spatial reception parameter QCL assumption; otherwise, it can be assumed that this assumption is not necessarily met or is not met for the UE.

[0129] If the assumption of the spatial reception parameter QCL is satisfied, the set of reference signal related indexes and channel state information includes at least a reference signal resource index;

[0130] When the assumption of the spatial receiving parameter QCL is not met, the set of reference signal related indexes and channel state information includes at least the following: reference signal port index, reference signal port index, reference signal resource index.

[0131] FIG. 6 is a schematic diagram illustrating a code division multiplexed (CDM) antenna port according to a preferred embodiment of the present disclosure.

[0132] Because Doppler shifts have different effects on reference signals under code division multiplexing, code orthogonality cannot be guaranteed in CDM (including TD-CDM, FD-CDM, or a combination thereof). In this case, different beams arrive in different directions, resulting in different Doppler shifts. Therefore, to apply CDM to antenna ports in a reference signal resource, a spatial reception characteristic QCL is assumed. That is, the transmission beams are the same or similar. That is, when CDM is used on antenna ports in a reference signal resource, a spatial reception parameter QCL is assumed for the antenna ports.

[0133] Only X time elements after the reference signal is configured or X time elements following the terminal's acknowledgment can the reference signal be used by the receiving terminal to report a set of reference signal-related indices and channel state information. The time elements can be, for example, OFDM symbols, slots, or subframes.

[0134] In uplink beam management, the precoding and beam of the uplink reference signal are instructed by the base station, or the user can select the precoding and beam of the uplink reference signal using a mode transparent to the base station. The base station (i.e., the uplink reference signal receiving end) determines the configuration of the uplink reference signal, but is unaware of the capabilities and requirements of the user end. Therefore, the user needs to notify or request the configuration of a certain uplink reference resource. That is, the terminal transmits uplink reference signal resource related information. Specifically, the signal includes at least one of the following:

[0135] 1) Grouping-related information. The grouping-related information includes one or more of the following: a group index, an uplink reference signal resource index, an uplink reference signal resource set index, an uplink reference signal resource antenna port index, and a window index. The group index may be an uplink group index or a downlink group index.

[0136] 2) the maximum number of layers in each group, 3) the maximum number of layers in an uplink reference signal, 4) uplink reference signal configuration request information, 5) uplink reference signal capability information, 6) uplink reference signal configuration request information and / or uplink reference capability information in cases where the grouping is configured by the base station or reported by the user, 7) uplink reference signal configuration request information in cases where the reference signal related index is configured by the base station or reported by the user;

[0137] 8) Uplink reference signal configuration request information, where a spatial filter is used that is the same or similar to that for the base station configured or user signaled reference signal.

[0138] The uplink reference signal configuration request includes at least one of the following: a type of uplink reference signal, a number of antenna ports of the uplink reference signal resource, a number of uplink reference signal resources, a number of uplink reference signal resource sets.

[0139] The uplink reference signal capability information includes at least one of the following: number of TXRUs; maximum number of antenna ports for uplink reference signal resources; maximum number of layers; number of groups announced or number of sets of groups announced; maximum number of groups supported; number of reference signal resources or antenna ports that can be transmitted simultaneously, number of uplink reference signal resources; maximum number of supported uplink reference signal resources; number of time domain repetitions of uplink reference signal resources.

[0140] According to the grouping-related information, the user groups and classifies the uplink reference signals. The grouping conditions corresponding to the grouping-related information include one or a combination of the following: reference signals in the same group cannot be transmitted simultaneously; more than P reference signals in the same group cannot be transmitted simultaneously; reference signals in the same group can be transmitted simultaneously; reference signals in different groups cannot be transmitted simultaneously; more than Q reference signals in different groups cannot be transmitted simultaneously; reference signals in different groups can be transmitted simultaneously. P and Q are integers equal to or greater than 1. In addition, P and Q are notified to the terminal from the base station.

[0141] The grouping-related information here is information about grouping of uplink reference signals, as shown in Table 1. According to this information, for example, the grouping of reference signals is based on the rule that reference signals in the same group cannot be transmitted simultaneously, but reference signals in different groups can be transmitted simultaneously. However, for each group, the maximum number of layers of the group is notified to the base station along with the uplink grouping. Table 2 shows the uplink reference signal grouping according to a preferred embodiment. [Table 2]

[0142] The uplink reference signal may include at least one of UL DMRS, SRS, and PTRS. The uplink reference signal configuration request information includes at least one or a combination of the following: a type of uplink reference signal, a number of antenna ports of the uplink reference signal resource, a number of uplink reference signal resources, and a number of sets of uplink reference signal resources.

[0143] In the case of mutual discrimination or beam support, the downlink grouping information can be applied to the uplink grouping. For example, the base station can announce the transmission of a reference signal related to the downlink grouping index.

[0144] The base station transmits uplink reference signal configuration related signaling including group index indication information to the terminal, and the terminal can transmit a reference signal according to the group index indication.

[0145] First, the base station side adopts full digital beamforming technology and can transmit CRI-0 to CRI-31 simultaneously. The base station side transmits CRI-0 to CRI-31 downlink CSI-RS reference signals, and the UE side only supports two panels, and each panel can only transmit or receive one beam at a time. For uplink reference signals, panel a may transmit SRI-0 to SRI-7, and panel b may transmit SRI-9 to SRI-14.

[0146] Figure 7 is a schematic diagram showing uplink and downlink reference signal grouping in the case of beam support according to a preferred embodiment of the present disclosure. For downlink beam measurement, reference signals in the same group can be received simultaneously, but reference signals in different groups cannot be received simultaneously. The user terminal reports the following grouping information to the base station side:

[0147] Table 3 shows the downlink grouping according to the preferred embodiment. [Table 3]

[0148] Therefore, when transmitting an uplink reference signal, the base station can notify the uplink reference signal by specifying a CRI index. However, if further specifications of the uplink reference signal are required, the base station can configure the SRS reference signal to transmit a user group index 1, and obtain the number of SRS reference signal resources of the UE corresponding to group index 1 (e.g., 8). The base station can configure the allocation of 8 aperiodic SRS resources for uplink reporting to the user. The user can then transmit reference signals corresponding to SRI0-7. It is assumed that the base station cannot transmit the uplink reference signal resources corresponding to SRI0-7 simultaneously. Therefore, during uplink data transmission, the user does not assume that the reference signals corresponding to SRI0-7 are transmitted at the same time, or at the same time as other reference signals that satisfy the QCL, or using the same filter as SRI0-7.

[0149] Figure 8 is a schematic diagram showing uplink reference signal grouping in a non-beam-enabled case according to a preferred embodiment of the present disclosure. In the non-beam-enabled case (where uplink beam training needs to be performed independently), the user reports its uplink beam transmission capability to the base station. Table 4 below is an example showing downlink reference signal grouping capability reporting. [Table 4]

[0150] Therefore, the base station can allocate two SRS reference signal resource sets to the user, where each reference signal resource set includes eight reference signal resources. Furthermore, in each reference signal combination, the reference signal resources are separated on different time domain units, and further, the reference signal resources of different reference signal resource sets can be allocated on the same time domain resource.

[0151] Therefore, the UE transmits two reference signal resource sets separately, one corresponding to SRI0-7 and the other corresponding to SRI8-16. The base station side selects SRI-1, SRI-8, SRI-14 for uplink transmission when measuring the channel. However, SRI-8 and SRI-14 cannot be used simultaneously for the same transmission.

[0152] The reference signal resource configuration information transmitted by the base station while configuring an uplink reference signal to a user includes grouping-related information. Furthermore, the grouping-related information can be configured for a reference signal resource set, or a reference signal resource, or an antenna port of a reference signal resource. The configuration of the grouping-related information indicates an association between the grouping-related information and the configured reference signal resource set, or a reference signal reference, or a signal resource antenna port. The association means that two associated parties meet the channel characteristic characteristic requirement or use the same transmission or reception scheme (e.g., transmit signals on the same user terminal panel).

[0153] In summary, the technical solution provided by the embodiment of the present disclosure supports reporting by the reference signal receiving end with its own capability, so that the reference signal transmitting end can inform the beam reporting according to beam grouping or user capability, and resolves the collision between the beam-related reporting and the traditional channel state information reporting. In particular, in the case of device rotation or link failure, the technical solution supports the reference signal receiving end to request the reference signal transmitting end to perform partial beam training for a part of the beam, so that high beam-related information reporting can be effectively achieved in different base stations, different base stations and user capabilities, as well as different scenarios.

[0154] Those skilled in the art will understand that all or part of the above steps can be implemented by a program instructing relevant hardware, and the program is stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk, or an optical disk. In some embodiments, all or part of the steps of the above embodiments can also be implemented by using one or more integrated circuits. Therefore, each module / unit in the above embodiments may be implemented in the form of hardware or software. The present invention is not limited to any particular form of combination of hardware and software.

[0155] It should be understood that various modifications and improvements can be made to the present invention without departing from the scope of the present invention, and corresponding changes and modifications are intended to be included within the scope of the appended claims.

[0156] The above technical solution supports reporting by the reference signal receiving end with its own capability, so that the reference signal transmitting end can inform the beam report according to beam grouping or user capability, and resolves the collision between the beam-related report and the traditional channel state information report. In particular, in the case of device rotation or link failure, the technical solution supports the reference signal receiving end to request the reference signal transmitting end to perform partial beam training for a part of the beam, thereby effectively achieving high beam-related information reporting in different base stations, different base stations and user capabilities, as well as different scenarios.

[0157] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software and a required general hardware platform, and of course can also be implemented through hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, can be implemented in the form of a software product stored in a storage medium (ROM / RAM, disk, optical disk, etc.), and can include some instructions for making a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) execute the method described in various embodiments of the present invention.

[0158] <Embodiment 2>

[0159] According to an embodiment of the present disclosure, an apparatus for information reporting is provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and will not be described again. As used hereinafter, the term "module" can implement a combination of software and / or hardware of a given function. The device described in the following embodiments is preferably implemented by software, but can also be implemented by hardware or a combination of software and hardware.

[0160] An apparatus for information reporting according to an embodiment of the present disclosure is provided, applicable in a second communication node, the apparatus comprising: a first receiving module configured to receive a reference signal from a first communication node and determine a reference signal related index and / or channel state information; A reporting module configured to report a set to a first communication node, the set including at least one of the reference signal related index and the channel state information.

[0161] According to another embodiment of the present disclosure, there is provided an apparatus for information transmission applicable in a second communication node, the apparatus comprising: a determining module configured to determine reference signal resource related information to be transmitted to the first communication node; A first transmitting module configured to transmit the relevant information to the first communication node.

[0162] According to another embodiment of the present disclosure, an apparatus for information reporting applicable in a first communication node is provided. The apparatus includes: a second communication module configured to transmit reference information to a second communication node, the second communication module determining a reference signal related index and / or channel state information according to the reference signal; A second receiving module configured to receive a set reported by a second communication node, the set including at least one of the reference signal related index and the channel state information.

[0163] Each of the above modules may be implemented in software or in hardware, in which case the latter may be implemented by, but is not limited to, providing the above modules on the same processor or by providing the above modules on different processors in any combination.

[0164] <Embodiment 3>

[0165] According to an embodiment of the present disclosure, a processor is provided for executing a program which, when executed, performs any of the methods of the alternative embodiments described above.

[0166] <Embodiment 4>

[0167] According to an embodiment of the present disclosure, a storage medium is provided having a program stored thereon, the program, when executed, performing any of the methods according to the alternative embodiments described above.

[0168] It will be apparent to those skilled in the art that the various modules or steps of the invention described above may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed across a network of multiple computing devices. In some embodiments, they may be implemented in program code executable by a computing device, such that they may be stored in a storage device for execution by the computing device, or in some cases, may be different. The steps shown or described may be performed sequentially or manufactured separately in individual integrated circuit modules, or multiple modules or steps thereof may be manufactured as a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.

[0169] The above description is merely a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. 1. A method for transmitting information, comprising: transmitting, by the terminal device to the base station, a capability of the terminal device to transmit a sounding reference signal (SRS) in a mode in which the terminal device determines precoding without instruction from a base station; the capability indicating a maximum number of simultaneously transmitted reference signal resources for the SRS transmission and a number of reference signal resources in each of one or more reference signal resource sets; The method further comprises the step of performing, by the terminal device, the SRS transmission without simultaneously using different sets of reference signal resources according to the capabilities and grouping of reference signal resources in a mode in which the terminal device determines precoding without instructions from the base station. A method comprising:

2. up to P distinct reference signal resources in the set of reference signal resources are transmitted simultaneously, where P is an integer greater than 1; The method of claim 1.

3. 1. A method for information reporting, comprising: receiving, by the base station reported from the terminal device, a capability of transmitting a sounding reference signal (SRS) in a mode in which the terminal device determines precoding without instructions from the base station; the capability indicating a maximum number of simultaneously transmitted reference signal resources for the SRS transmission and a number of reference signal resources in each of one or more reference signal resource sets; The method further comprises receiving, by the base station, the SRS transmission from the terminal device without simultaneously using different sets of reference signal resources according to the capabilities and grouping of reference signal resources in a mode in which the terminal device determines precoding without instructions from the base station. A method comprising:

4. The capability further indicates a maximum number of layers that the terminal device supports for transmission.

4. The method of claim 3.

5. up to P distinct reference signal resources in the set of reference signal resources are transmitted simultaneously, where P is an integer greater than 1; 4. The method of claim 3.

6. 1. An apparatus for transmitting information comprising a processor, the processor comprising: The terminal device is configured to perform a step of transmitting to the base station a capability of transmitting a sounding reference signal (SRS) in a mode in which the terminal device determines precoding without instructions from the base station, the capability indicating a maximum number of simultaneously transmitted reference signal resources for the SRS transmission and a number of reference signal resources in each of one or more reference signal resource sets; The processor is further configured to perform the step of performing the SRS transmission without simultaneously using different sets of reference signal resources according to the capability and the grouping of reference signal resources in a mode in which the terminal device determines precoding without instruction from the base station. An apparatus comprising:

7. up to P distinct reference signal resources in the set of reference signal resources are transmitted simultaneously, where P is an integer greater than 1; 7. The apparatus of claim 6.

8. 1. An apparatus for reporting information comprising a processor, the processor comprising: The method is configured to perform a step of receiving from a terminal device a capability of transmitting a sounding reference signal (SRS) in a mode in which the terminal device determines a precoding without instructions from a base station, the capability indicating a maximum number of simultaneously transmitted reference signal resources for the SRS transmission and a number of reference signal resources in each of one or more reference signal resource sets; The processor is further configured to perform a step of receiving the SRS transmission from the terminal device without simultaneously using different sets of reference signal resources according to the capabilities and grouping of reference signal resources in a mode in which the terminal device determines precoding without instruction from the base station. An apparatus comprising:

9. up to P distinct reference signal resources in the set of reference signal resources are transmitted simultaneously, where P is an integer greater than 1; 9. The apparatus of claim 8.

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