Reference signal resource configuration method and device

Abstract

In an embodiment of the present invention, a method and apparatus for configuring reference signal resources are provided, the method including: a terminal device receiving a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure first reference signal resources for M ports; and the terminal device receiving a second resource configuration and / or a channel state information reporting configuration, the first resource configuration, the second resource configuration, or the channel state information reporting configuration being at least further used by the terminal device to determine second reference signal resources for N ports, where N is less than M.

Description

[Technical Field]

[0001] The present invention relates to the field of communications. [Background technology]

[0002] As 5G becomes more widespread in various industries and applied to wider areas, it requires much higher data rates, denser networks, more antennas, wider bandwidths and more frequency bands to handle more advanced services, which leads to higher energy consumption of 5G equipment.

[0003] According to data statistics from telecommunications carriers, the average energy consumption of a single 5G base station is more than three times that of an LTE base station, and electricity costs account for approximately 50% of the cost of deploying 5G networks for telecommunications carriers. More importantly, 5G base stations still have a significant energy consumption overhead even during periods when there is no traffic (business / service). Therefore, network energy conservation (energy savings) is crucial for improving environmental sustainability, reducing environmental impact (e.g., reducing greenhouse gas emissions), and saving operational costs. Therefore, energy conservation in 5G networks is an issue that must be addressed urgently.

[0004] To achieve network energy conservation, Rel-18 has set up a network energy conservation agenda to research various energy conservation technologies. In the discussion, network energy conservation technologies can be categorized into types such as time domain, frequency domain, space domain, and energy domain energy conservation. Space domain energy conservation, for example, is dynamic adjustment of the number of antennas. Energy domain energy conservation, for example, is dynamic adjustment of data transmission power. Time domain energy conservation, for example, is the introduction of cell DTX / DRX technology. By utilizing various energy conservation technologies, significant energy savings can be achieved in network equipment and / or terminal devices.

[0005] It should be noted that the introduction of the above background art is intended to clearly and completely explain the technical solutions of the present invention and to facilitate understanding by those skilled in the art, and these technical solutions described in the background art of the present invention should not be construed as being well known to those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0006] However, the inventors have discovered that in some scenarios of wireless communication applications (e.g., energy-saving mode), adverse effects may occur. For example, when a network device dynamically adjusts the number of antennas or transmission power, this may cause corresponding channel changes, which may result in inaccurate or delayed Channel State Information (CSI) measurement results or CSI reporting results from a terminal device, ultimately affecting transmission performance. Currently, how a terminal device can accurately and timely configure reference signal resources and accurately measure and report CSI is an important problem that needs to be solved.

[0007] In view of at least one of the above problems, embodiments of the present invention provide a method and apparatus for configuring reference signal resources. [Means for solving the problem]

[0008] According to one aspect of an embodiment of the present invention, there is provided a reference signal resource configuration method, which includes: A terminal device receives a first resource configuration, the first resource configuration including at least a first parameter, and the first parameter is used to configure a first reference signal resource of an M port; and The terminal device receives a second resource configuration and / or a channel state information (CSI) reporting configuration; Wherein, the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is at least further used by the terminal device to determine second reference signal resources of N ports, where N is less than M.

[0009] According to another aspect of the embodiment of the present invention, there is provided a reference signal resource configuration device, comprising: a receiving unit for receiving a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port; The receiving unit further receives a second resource configuration and / or a channel state information (CSI) reporting configuration; Wherein, the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is at least further used by the terminal device to determine second reference signal resources of N ports, where N is less than M.

[0010] According to another aspect of the embodiment of the present invention, there is provided a reference signal resource configuration method, comprising: The network device sends a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port; and the network device transmitting a second resource configuration and / or a channel state information (CSI) reporting configuration; Wherein, the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is at least further used by the terminal device to determine second reference signal resources of N ports, where N is less than M.

[0011] According to another aspect of the embodiment of the present invention, there is provided a reference signal resource configuration device, comprising: a transmitting unit for transmitting a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port; The transmitting unit further transmits a second resource configuration and / or a channel state information (CSI) reporting configuration; Wherein, the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is at least further used by the terminal device to determine second reference signal resources of N ports, where N is less than M.

[0012] According to another aspect of an embodiment of the present invention, there is provided a communication system, comprising: Including network equipment and terminal equipment, The network device transmits a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port; and transmits a second resource configuration and / or a channel state information (CSI) reporting configuration. The terminal device receives the first resource configuration, the second resource configuration, and / or the channel state information (CSI) reporting configuration, wherein at least the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is further used by the terminal device to determine second reference signal resources of N ports, where N is less than M. [Effects of the Invention]

[0013] The advantageous effects of the embodiments of the present invention are at least as follows: a terminal device can obtain first reference signal resources of M ports and determine second reference signal resources of N ports, so that the terminal device can efficiently and accurately perform CSI measurements even when adjusting resources (e.g., for the purpose of energy saving), and can provide accurate channel information for scheduling of network devices.

[0014] The following description and reference to the drawings disclose in detail particular embodiments of the present invention, illustrating ways in which the principles of the present invention may be employed. However, the scope of the present invention is not limited thereto. Embodiments of the present invention may include various changes, modifications, and alternatives within the scope of the appended claims.

[0015] Additionally, features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, may be combined with features in the other embodiments, or may be substituted for features in the other embodiments.

[0016] It should be noted that when used in this specification, terms such as "comprise / have" refer to the presence of a feature, element, step, or assembly, but do not exclude the presence or addition of one or more other features, elements, steps, or assemblies. [Brief explanation of the drawings]

[0017] Elements and features described in one drawing or one embodiment of the invention may be combined with elements and features shown in one or more other drawings or embodiments, and in the drawings, like reference numerals are used to indicate corresponding parts in several drawings and also to indicate corresponding parts used in multiple embodiments. [Figure 1] 1 is a diagram illustrating a communication system according to an embodiment of the present invention. [Figure 2] FIG. 1 is a diagram showing a CDM pattern in an embodiment of the present invention. [Figure 3] FIG. 1 illustrates port multiplexing in an embodiment of the present invention. [Figure 4] FIG. 10 is another diagram illustrating port multiplexing in an embodiment of the present invention. [Figure 5] FIG. 10 is a diagram illustrating an example of resource adjustment in an embodiment of the present invention. [Figure 6] FIG. 10 is a diagram illustrating a reference signal resource configuration method according to an embodiment of the present invention. [Figure 7]FIG. 2 is a diagram illustrating an example of a first reference signal resource and a second reference signal resource in an embodiment of the present invention. [Figure 8] FIG. 10 is a diagram illustrating an example of a first resource configuration in the embodiment of the present invention. [Figure 9] FIG. 10 is a diagram illustrating an example of a CSI reporting configuration according to an embodiment of the present invention. [Figure 10] FIG. 10 is a diagram illustrating an example of a second resource configuration in the embodiment of the present invention. [Figure 11] FIG. 10 is another diagram illustrating a reference signal resource configuration method in an embodiment of the present invention. [Figure 12] 1 is a diagram illustrating a reference signal resource configuration device according to an embodiment of the present invention. [Figure 13] FIG. 10 is another diagram illustrating a reference signal resource configuration device according to an embodiment of the present invention. [Figure 14] FIG. 1 illustrates a network device according to an embodiment of the present invention. [Figure 15] FIG. 2 is a diagram illustrating a terminal device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] The foregoing and other features of the present invention will become more apparent from a consideration of the accompanying drawings and the following description. While the specification and drawings disclose particular embodiments of the present invention, they illustrate only some of the embodiments which may employ the principles of the present invention, and it is to be understood that the present invention is not limited to the described embodiments, but rather includes all modifications, variations, and alternatives which fall within the scope of the appended claims.

[0019] In embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network conforming to any communication standard, such as New Radio (NR), Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0020] Additionally, communications between devices in a communications system may be performed according to any level of communications protocol, including, but not limited to, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), and / or other conventional or future-developed communications protocols.

[0021] In the embodiments of the present invention, the term "network equipment" refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services to the terminal device. The network equipment may include, but is not limited to, a node and / or a donor in an IAB architecture, a base station (BS), an access point (AP), a transmission reception point (TRP), a broadcast transmitter, a mobile management entity (MME), a network gateway, a server, a radio network controller (RNC), a base station controller (BSC), etc.

[0022] A base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), a 5G base station (gNB), etc., and may further include a Remote Radio Head (RRH), a Remote Radio Unit (RRU), a relay, or a low-power node (e.g., femto, pico, etc.). The term "base station" may also include some or all of the functionality thereof, and each base station can provide communication coverage for a particular geographic area. The term "cell" may refer to a base station and / or the area it covers, depending on the context in which the term is used.

[0023] In embodiments of the present invention, the term "User Equipment" (UE) or "Terminal Equipment" (TE) refers to a device that accesses a communication network and receives services from the network, for example, via network equipment. User equipment may be fixed or mobile, and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, etc.

[0024] User equipment may include, but is not limited to, cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, mobile devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smart watches, digital cameras, and the like.

[0025] Furthermore, for example, in the case of a scenario such as the Internet of Things (IoT), the user equipment may also be a monitoring or measuring device or apparatus, including, but not limited to, a Machine Type Communication (MTC) terminal, an in-vehicle communication terminal, a Device to Device (D2D) terminal, a Machine to Machine (M2M) terminal, etc.

[0026] Furthermore, the term "network side" or "network equipment side" refers to the network side, which may be a base station or may include one or more network equipment as described above. The term "user side" or "terminal side" or "terminal equipment side" refers to the user or terminal side, which may be a UE or may include one or more terminal equipment as described above. Unless otherwise specified, "equipment" may refer to either network equipment or terminal equipment.

[0027] Hereinafter, the scenario of the embodiment of the present invention will be described through an example, but the present invention is not limited thereto.

[0028] 1 is a diagram showing a communication system in an embodiment of the present invention, taking terminal devices and network devices as an example. As shown in FIG. 1, communication system 100 may include network device 101 and terminal devices 102 and 103. For convenience, FIG. 1 illustrates an example in which only two terminal devices and one network device are used, but the embodiment of the present invention is not limited to this.

[0029] In an embodiment of the present invention, legacy or future traffic may be carried between the network device 101 and the terminal devices 102 and 103. For example, this traffic may include, but is not limited to, enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mMTC), Ultra-Reliable and Low-Latency Communication (URLLC), etc.

[0030] 1 shows that both of the two terminal devices 102 and 103 are within the coverage of the network device 101, but the present invention is not limited to this. Neither of the two terminal devices 102 and 103 may be located within the coverage of the network device 101, or one terminal device 102 may be located within the coverage of the network device 101 and the other terminal device 103 may be located outside the coverage of the network device 101.

[0031] In an embodiment of the present invention, the higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, for example, referred to as an RRC message, including, for example, MIB, system information, and dedicated RRC messages, or referred to as an RRC information element (RRC IE). The higher layer signaling may also be, for example, Medium Access Control (MAC) signaling, or referred to as a MAC control element (MAC CE). However, the present invention is not limited thereto.

[0032] In a mobile communication system, a terminal device typically performs CSI (Channel State Information) measurement based on instructions and settings from a network device, and then reports the measured CSI to the network device. When scheduling the terminal device, the network device can refer to the CSI to adopt an appropriate transmission method with appropriate physical resources to schedule transmission for the terminal device. Different terminal devices may experience different physical channel conditions, and the CSI feedback mechanism can be used to rationally and effectively utilize physical resources, thereby improving the transmission efficiency of the entire network.

[0033] In the NR CSI feedback mechanism, the terminal device mainly measures and reports reference signals from the network device based on the CSI configuration, where the reference signals include a channel state information reference signal (CSI-RS), a synchronization signal block (SSB), etc. The NR CSI configuration mainly includes the following: a resource configuration for CSI measurement configured by the network device for the terminal device (which may also be referred to as a CSI-RS resource configuration), and a reporting configuration configured by the network device regarding how the terminal device reports (which may also be referred to as a CSI reporting configuration).

[0034] For example, the CSI-RS resource configuration mainly configures the following: the time-frequency-spatial domain resources of the CSI-RS resource, and the parameters required for generating the RS sequence. In short, based on the CSI-RS resource configuration, the terminal device can accurately determine the RS sequence transmitted by the network device and the specific time-frequency-spatial domain resource location of the sequence. Therefore, the terminal device can receive the sequence at the corresponding location and perform signal processing on the received sequence using the locally generated sequence as a reference, thereby accurately estimating the channel. For details on how to generate the RS sequence, please refer to the related art, and a detailed description thereof will be omitted here. In the embodiments of the present invention, the CSI-RS resource configuration is described.

[0035] For the time-frequency location of each CSI-RS resource, the network device determines it according to the following parameters in CSI-RS-ResourceMapping, as shown in Table 1 below:

[0036] [Table 1] As shown in Table 1, the firstOFDMSymbolInTimeDomain and firstOFDMSymbolInTimeDomain2 are used to determine the location of the CSI-RS resource in the time domain, and currently NR supports occupying one, two, or four orthogonal frequency division multiplexing (OFDM) symbols. The frequencyDomainAllocation parameter is used to determine the location of the CSI-RS resource in the frequency domain, and the nrofPorts parameter is used to determine the number of CSI-RS ports, and currently NR supports settings of 1, 2, 4, 8, 12, 16, 24, and 32 ports. The cdm-Type parameter is used to determine the code division multiplexing (CDM) type of the CSI-RS resource, and currently NR supports three patterns: CDM-2, CDM-4, ​​and CDM-8.

[0037] 2 shows a CDM pattern in an embodiment of the present invention. Taking CDM-4 as an example, the pattern includes four ports, each of which occupies all of the resource elements (REs) in the pattern, and the ports are differentiated by using different orthogonal cover codes.

[0038] The REs occupied by one CDM pattern constitute one CDM group, and each CDM group includes 2, 4, or 8 ports. Thus, multiple ports of the CSI-RS can be distributed among multiple CDM groups of the same pattern, i.e., the port distribution of the CSI-RS can be determined by the aggregation of the CDM groups.

[0039] NR supports multiple flexible aggregation schemes, and multiple CDM aggregation schemes are supported for the same type of port count configuration. NR flexibly supports CSI-RS for 2 to 32 ports by using aggregation of CDM groups of three CDM patterns: CDM-2, CDM-4, ​​and CDM-8. For one multi-port CSI-RS resource, multiple multiplexing methods may be adopted between different ports.

[0040] 3 is a diagram illustrating port multiplexing in an embodiment of the present invention. As shown in FIG. 3, a CDM+TDM scheme is used, in which four CSI-RS resources are aggregated using a CDM-2 pattern and divided into two CDM groups. Each CSI-RS port in the CDM group is mapped to two REs in the pattern. Orthogonal multiplexing between ports is achieved by an orthogonal cover code (OCC) of length 2. Ports between the CDM groups (e.g., ports 0 and 1 and ports 2 and 3) are orthogonalized by TDM.

[0041] Figure 4 is another diagram illustrating port multiplexing in an embodiment of the present invention. As shown in Figure 4, a CDM+FDM+TDM scheme is used, in which 24 CSI-RS resources are aggregated using a CDM-4 pattern and divided into six CDM groups. Orthogonal multiplexing between CSI-RS ports within each CDM group is achieved by an OCC of length 4. Orthogonal multiplexing between different CDM groups is achieved by TDM or FDM.

[0042] Currently, CSI-RS resource configurations are semi-statically configured by Radio Resource Control (RRC) signaling and generally do not change over a relatively long period of time. When these resources need to be changed, they can be adjusted by RRC reconfiguration. However, in some wireless communication application scenarios (e.g., energy saving mode), these resources may be changed due to the possibility of adjusting the transmission power, the number of antennas, etc.

[0043] 5 is a diagram illustrating an example of resource adjustment in an embodiment of the present invention. For example, a network device first configures eight CSI-RSs for one terminal device for channel measurement, etc. After that, the network device readjusts the antenna configuration, for example, turning off some antenna panels or some antenna elements. After the adjustment, the network device provides service to the terminal device using four CSI-RSs. Due to the change in antenna configuration, the channels traversed by the eight CSI-RSs before the change and the four CSI-RSs after the change are different.

[0044] Such adjustments may be relatively static or relatively dynamic. In comparison, relatively dynamic adjustments can achieve better power saving effects. Such relatively dynamic adjustments may be performed at the slot level (for example, with a subcarrier spacing of 15 kHz, one slot is 1 ms) or at the symbol level (for example, with a subcarrier spacing of 15 kHz, one symbol is approximately 71.4 μs).

[0045] When network equipment dynamically adjusts settings (e.g., CSI-RS port), sudden changes in the channel may occur (the equivalent channel response on the receiver side before and after adjustment becomes discontinuous). In such cases, if the existing CSI measurement and reporting mechanism is used, the terminal equipment will not be able to detect the sudden changes and therefore will not be able to perform accurate measurements and reports. In other words, the terminal equipment will not be able to accurately measure and report CSI, and accordingly, the network equipment will not have accurate channel state information for scheduling decisions.

[0046] On the other hand, even if the network device performs relatively static configuration, the existing CSI-RS resource configuration is dedicated to the terminal device. Therefore, if the existing configuration mechanism is adopted, the network device may need to perform configuration for each terminal device it serves one by one after each adjustment. In this way, considering the overhead of RRC configuration, the signaling overhead may be too large, which may affect network transmission efficiency and reduce the data transmission rate.

[0047] Therefore, one problem that needs to be solved is how to enable network equipment to configure reference signal resources accurately and in a timely manner, so that terminal equipment can perform CSI measurements efficiently and accurately even when resource adjustment (e.g., for the purpose of energy saving) is required.

[0048] In the embodiments of the present invention, the reference signal is taken as an example of CSI-RS, and the reference signal resource may be referred to as a CSI-RS resource and the resource configuration may be referred to as a CSI-RS resource configuration, but the present invention is not limited thereto. Also, the embodiments of the present invention are described using energy saving as an example, but are not limited thereto and may be applied to any scenario involving CQI calculation or CSI measurement.

[0049] <Example of the first aspect> In an embodiment of the present invention, a reference signal resource configuration method is provided, which is described from the terminal device side. Figure 6 is a diagram showing a reference signal resource configuration method in an embodiment of the present invention. As shown in Figure 6, the method includes: 601: A terminal device receives a first resource configuration, the first resource configuration including at least a first parameter, and the first parameter is used to configure first reference signal resources of M ports (M ports); and 602; The terminal device receives a second resource configuration and / or a channel state information (CSI) reporting configuration, in which at least the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is further used by the terminal device to determine second reference signal resources of N ports (N ports), in which N is less than M.

[0050] Note that the above-mentioned FIG. 6 is merely an illustrative example of an embodiment of the present invention, and the present invention is not limited thereto. For example, the execution order of each operation may be appropriately adjusted, or some operations may be appropriately added or removed. Those skilled in the art may make appropriate modifications based on the above content, without being limited to the description of the above-mentioned FIG. 6.

[0051] For example, at least two of the first resource configuration, the second resource configuration, and the CSI reporting configuration may be carried by the same RRC signaling or may be carried by different RRC signaling. Also, for example, the first resource configuration, the second resource configuration, and the CSI reporting configuration may be different configurations or may be included in the same configuration. This is not a limitation in the embodiments of the present invention.

[0052] In an embodiment of the present invention, a terminal device can obtain first reference signal resources for M ports and determine second reference signal resources for N ports, so that the terminal device can efficiently and accurately perform CSI measurements even when adjusting resources (e.g., for the purpose of energy saving), thereby providing accurate channel information for scheduling by network devices.

[0053] In some embodiments, the first reference signal resource for the M ports and the second reference signal resource for the N ports are NZP CSI-RS resources for channel measurement. The first reference signal resource for the M ports and the second reference signal resource for the N ports may be periodic or semi-persistent.

[0054] For example, one feasible scheme for network energy conservation is dynamic port adjustment. Reference signal resources for which port adjustment is required are non-zero-power CSI-RS resources based on channel measurement. Furthermore, CSI-RS resources based on TRS measurement (corresponding to the upper layer parameter trs_info) and beam management (corresponding to the upper layer parameter repetition setting on or off) do not require port adjustment operations because the number of ports is relatively small.

[0055] In some embodiments, the first reference signal resource and / or the second reference signal resource is at least a time domain resource and / or a frequency domain resource and / or a spatial domain resource for transmitting or receiving a reference signal.

[0056] In some embodiments, the second reference signal resource of the N ports is a portion of the first reference signal resource of the M ports.

[0057] For example, the second reference signal resources of the N ports are time domain resources and / or frequency domain resources and / or spatial domain resources corresponding to some of the first reference signal resources of the M ports. In a network energy saving scenario, a terminal device may be configured with multiple CSI-RS resources within a channel measurement resource set in a CSI reporting configuration (CSI-ReportConfig). One type of second reference signal resource of the N ports corresponds to one type of spatial domain element / port muting mode or one type of spatial domain element / port configuration.

[0058] In some embodiments, the first parameter for configuring the first reference signal resource of the M ports includes at least one of the following parameters: a number of ports (nrofPort) M, a parameter for determining the location of time domain resources, and a parameter for determining the location of frequency domain resources.

[0059] For example, the parameter for determining the time domain resource location is the time domain location information (firstOFDMSymbolInTimeDomain) of the first OFDM symbol included in the first reference signal resource, and the parameter for determining the frequency domain resource location is the frequency domain allocation information (frequencyDomainAllocation) of the first reference signal resource.

[0060] In some embodiments, the terminal device determines first reference signal resources for M ports based on the first resource configuration, where the value of M is determined by a parameter nrofPort, and the first reference signal resources for M ports represent time-frequency-spatial domain resources corresponding to all ports in the first resource configuration. The second reference signal resources for N ports can be determined by the first reference signal resources for M ports.

[0061] 7 is a diagram illustrating an example of first reference signal resources and second reference signal resources in an embodiment of the present invention. For example, ports 0 to 3 and ports 4 to 7 of the first reference signal resources of eight ports correspond to different antenna panels and are powered independently. When the base station turns off the power switches corresponding to ports 0 to 3, the circuits corresponding to ports 4 to 7 still work normally, and the second resources of the four ports after the antennas are turned off are the time-frequency-spatial domain resources corresponding to ports 4 to 7 of the first reference signal resources of the eight ports before the antennas are turned off. Therefore, the terminal device can determine the second reference signal resources of N ports based on the time-frequency-spatial domain resources corresponding to some ports of the first reference signal resources of M ports.

[0062] The following describes how to determine the second reference signal resource of an N port.

[0063] In some embodiments, the terminal device determines first reference signal resources for the M ports based on the first parameter, and determines second reference signal resources for the N ports based on the first parameter and a second parameter, wherein the second parameter is included in the first resource configuration and / or the CSI reporting configuration.

[0064] In some embodiments, the second parameter is included in the first resource configuration, and may be included in, for example, a Resource Setting (e.g., CSI-ResourceMapping), or a ResourceSet (e.g., nzp-CSI-ResourceSet), or a Resource (e.g., nzp-CSI-Resource), or a CSI-RS-ResourceMapping.

[0065] In some embodiments, at least one second reference signal resource can be determined based on the first resource configuration, and the second parameter is used to indicate that N ports among the M ports of the first reference signal resource are the second reference signal resources, or the second parameter indicates or enables resources corresponding to some ports among the first reference signal resources of the M ports as second reference signal resources of the N ports.

[0066] Table 2 is an example of a first resource configuration.

[0067] [Table 2] As shown in Table 2, the second parameter may be named PortConfig and may be included in CSI-RS-ResourceMapping, where the current nrofPorts is set to p8, representing M=8, and PortConfig is set to Port4 11110000, representing the previous four ports of the 8 ports, i.e., the second resource of port N is the time-frequency resource corresponding to the previous four ports.

[0068] 8 is a diagram illustrating an example of first resource configuration in an embodiment of the present invention. As shown on the left side of FIG. 8, the terminal device determines one second reference signal resource, for example, the second resource of port N, based on PortConfig1. As shown on the right side of FIG. 8, the terminal device can determine two second reference signal resources, for example, the second resource of port L and the second resource of port S, based on PortConfig1 and PortConfig2, where L and S are both smaller than M.

[0069] For example, on the left side of Figure 8, PortConfig1 corresponds to one second resource, and PortConfig is set to Port4 11110000, representing the first four ports of the eight ports, that is, the second resources of the N ports are time-frequency resources corresponding to the first four ports.

[0070] 8, PortConfig1 and PortConfig2 correspond to two second resources, PortConfig1 is set to Port4 11110000, representing the first four ports of the eight ports, i.e., the second resource of L port is the time-frequency resource corresponding to the first four ports. PortConfig2 is set to Port2 11000000, representing the first two ports of the eight ports, i.e., the second resource of S port is the time-frequency resource corresponding to the first two ports.

[0071] In some embodiments, the second parameter is included in a CSI reporting configuration, CSI-ReportConfig.

[0072] Table 3 is an example of a CSI reporting configuration.

[0073] [Table 3] As shown in Table 3, the second parameter may be named PortConfig and may be included in the CSI-Report Config, where the current nrofPorts is set to p8, representing M=8, and PortConfig is set to Port4 11110000, representing the previous four ports of the eighth port, i.e., the second resource of port N is the time-frequency resource corresponding to the previous four ports.

[0074] 9 is a diagram illustrating an example of a CSI reporting configuration according to an embodiment of the present invention. As shown on the left side of FIG. 9, a terminal device determines one second reference signal resource, for example, the second resource of port N, based on PortConfig1 in CSI-ReportConfig0. As shown on the right side of FIG. 8, a terminal device can determine two second reference signal resources, for example, the second resource of port L and the second resource of port S, based on PortConfig1 and PortConfig2 in CSI-ReportConfig0, where L and S are both smaller than M.

[0075] The method for specifying the second parameter will be described below as an example.

[0076] In some embodiments, the second parameter is X bits, and the X bits are used to indicate N consecutive or non-consecutive ports among the M ports, for example, in the form of a bitmap.

[0077] In some embodiments, X is equal to M, and the second parameter is M bits, one bit of which corresponds to one of the M ports, and the bit indicates whether the time-frequency resource of the corresponding port belongs to the second reference signal resource of the N ports.

[0078] For example, each bit in the bitmap is used to indicate one port. The terminal device receives M bits of information, where the m-th bit being 1 indicates that it is one of the N ports, and the m-th bit being 0 indicates that it is not one of the N ports, where m is less than or equal to M and greater than or equal to 1. Alternatively, the m-th bit being 0 may indicate that it is one of the N ports, and the m-th bit being 1 may indicate that it is not one of the N ports, where m is less than or equal to M and greater than or equal to 1. However, the present invention is not limited to this.

[0079] For example, a terminal device receives a first resource configuration for 8 ports, and then receives 8 bits of information to determine a second resource for 4 ports, where each bit represents a port, and the m-th bit being 1 represents one of the 4 ports. Figures 8 and 9 provide an exemplary explanation of this method.

[0080] In some embodiments, X is smaller than M, the first reference signal resources of the M ports include X port sets, the second parameter is X bits, one bit of which corresponds to one port set among the X port sets, and the bit indicates whether the time-frequency resources of the corresponding port set belong to the second reference signal resources of the N ports, for example, the port set is a CDM group or a predefined or pre-configured port set.

[0081] For example, each bit in the bitmap is used to represent one port pair. M ports are divided into X pairs, and each pair contains M / X ports. The terminal device receives X bits of information, and each bit represents one port pair.

[0082] In one example, one port pair can correspond to one CDM group, X is the number of CDM groups, and M / X is the size of the CDM group (1, 2, 4, 8). For example, a terminal device receives a first resource configuration for 8 ports, of which the CDM type is CDM-4, ​​that is, each CDM group includes 4 ports, and the terminal device further receives 2-bit information to determine second resources for 4 ports, with each bit representing one CDM group.

[0083] In another example, the port set division may be obtained by RRC signaling, for example, when the terminal device receives the first resource configuration of 32 ports, it simultaneously receives RRC signaling to determine the port set division information, where ports 0 to 15 are port set 1 and ports 16 to 32 are port set 2, and the terminal device receives 2 bits of information to determine the second resources of 16 ports, with each bit representing one port set.

[0084] In this way, the method of specifying using X bits is relatively flexible and allows for setting consecutive or non-consecutive ports, thereby improving the flexibility with which network devices can set ports.

[0085] In some embodiments, a list of length L is predefined or preset, where each row in the list represents one value for N ports among the M ports, and the X bits are used to indicate an index into the list, where X=log2(L).

[0086] For example, one list may be predefined and the index of that list may be indicated by an X bit.

[0087] In some embodiments, the second parameter is a Start and Length Indicator (SLIV) parameter, and the SLIV parameter is used to indicate consecutive N ports among the M ports.

[0088] For example, the second parameter is used to indicate the index of the starting port of the consecutive N ports and the length (number) of the ports, e.g., {starting port index, number of ports / length}.

[0089] Furthermore, for example, the second parameter is used to indicate the index of the starting port set of the N consecutive ports and the length (number) of the port set. The port set is a CDM group or a predefined or preconfigured port set. For example, it indicates {starting CDM group index, number / length of CDM sets}. Such a configuration method requires relatively small signaling overhead, thereby saving signaling overhead.

[0090] In some embodiments, the second parameter is a single value, and the value indicates that some of the first reference signal resources of the M ports are second reference signal resources of the N ports.

[0091] For example, the enumeration method may be adopted, and when M=8 and N=4, the value of the second parameter may have two cases, namely, {11110000,00001111}, which respectively represent ports 0 to 3 and ports 4 to 7 of the eight ports. Such a setting method requires relatively small signaling overhead, thereby saving signaling overhead.

[0092] In some embodiments, the second parameter is a numerical value or a proportional value, and the numerical value or proportional value indicates that some of the first reference signal resources of the M ports are second reference signal resources of the N ports.

[0093] For example, the second parameter is equal to 2 or 1 / 2, meaning N=M / 2, or for example, the second parameter is equal to 4 or 1 / 4, meaning N=M / 4, or for example, the second parameter is equal to 8, meaning N=M / 8. Specifically, which port N is among M ports may be determined by a pre-defined rule method.

[0094] Furthermore, for example, the second parameter may be used for enabling, for example, EsEnable, and indicates that the second resource of the N port corresponds to a part of the first resource of the current M port when the network device sets the parameter. Specifically, which port of the M port the N port corresponds to may be determined by a pre-defined rule method or a pre-configuration (RRC configuration) method.

[0095] In some embodiments, the terminal equipment determines a first reference signal resource for the M port based on the first parameter, and the terminal equipment determines a second reference signal resource for the N port based on the first parameter and a third parameter, wherein the third parameter is included in the second resource configuration.

[0096] For example, the third parameter includes CSI-RS resource configuration index information including the second parameter and / or the reference resource.

[0097] In some embodiments, the terminal equipment determines a first reference signal resource for the M port based on the first parameter, and the terminal equipment determines a second reference signal resource for the N port based on the first parameter and a fourth parameter, the fourth parameter being included in the second resource configuration.

[0098] For example, the fourth parameter is used to indicate the time-frequency location of the second reference signal resource of the N port, and specifically includes at least a parameter (firstOFDMSymbolInTimeDomain) for determining the time-domain location of the first OFDM symbol, a parameter (secondOFDMSymbolInTimeDomain) for determining the time-domain location of the second OFDM symbol, and a parameter (frequencyDomainAllocation) for determining the frequency-domain resource location.

[0099] The following is an exemplary description of determining the second reference signal resources of N ports based on the second resource configuration.

[0100] For example, the second resource configuration may refer to the first resource configuration, and the second resource configuration may include only information for determining the second reference signal resource of the N port, and other information that is the same as the first resource configuration (e.g., time domain characteristics, QCL characteristics, etc.) is not duplicated and listed in the second resource configuration.

[0101] For example, the second resource configuration only includes index information and / or time-frequency location configuration information (CSI-Resource Mapping) of the reference resource configuration, and does not include other time-domain characteristics, QCL characteristics, etc. Therefore, the terminal device receives the first resource configuration and the second resource configuration, and determines information such as the time-frequency locations and the number of ports of the second reference signal resources of the N ports based on the second resource configuration, and can determine other information such as the time-domain characteristics and QCL characteristics of the second reference signal resources of the N ports based on the first resource configuration. The terminal device may receive one or more second resource configurations and determine one or more second reference signal resources. For example, the terminal device receives one second reference signal resource configuration and determines the second resources of the N ports, or, for example, the terminal device receives two second reference signal resource configurations and determines the second resources of the L port and the second resources of the S port, respectively, where both second resource configurations refer to the first resource configuration.

[0102] Table 4 is an example of a second resource configuration.

[0103] [Table 4] As shown in Table 4, the second resource configuration is named NZP-CSI-RS-Resource_ES and may refer to NZP-CSI-RS-Resource. NZP-CSI-RS-Resource_ES may only include Ref-ResourceId and resourceMapping, where resourceMapping is used to indicate the time-frequency characteristics of the second resource of N ports.

[0104] Figure 10 is a diagram illustrating an example of second resource configuration in an embodiment of the present invention. As shown on the left side of Figure 10, a terminal device determines one second reference signal resource, for example, a second resource for port N, based on nzp-CSI-RS-Resource_ES 1. As shown on the right side of Figure 10, a terminal device can determine two second reference signal resources, for example, a second resource for port L and a second resource for port S, based on nzp-CSI-RS-Resource_ES 1 and nzp-CSI-RS-Resource_ES 2, where L and S are both smaller than M.

[0105] In some embodiments, the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is carried by radio resource control (RRC) signaling and / or a medium access control (MAC) control element (CE).

[0106] In some embodiments, the second reference signal resource of the N port may be configured by UE-specific signaling, or may be configured by cell-specific or group-specific signaling, such as RRC, MAC CE, or DCI.

[0107] Taking the above-mentioned second parameter as an example, for example, the second parameter can indicate the second reference signal resources of N ports in the form of a numerical value, a proportional value, or an enable. The second parameter can be simultaneously transmitted to multiple terminal devices through one set-based RRC signaling, that is, the signaling is based on Cell-specific or Group UEs-specific. For example, the second parameter is used to indicate a numerical value, a proportional value, or an enable, and does not need to specifically indicate the number of ports. The second parameter values ​​of multiple terminal devices are exactly the same, and can be transmitted to multiple terminal devices through one set of signaling.

[0108] Although the above description has been given taking the second parameter as an example, the present invention is not limited thereto, and for example, a set of signaling may include one or any combination of the above-mentioned first to fourth parameters and the first to fourth information, or may further include a parameter for selecting a predefined scheme, etc. Cell-specific signaling or group-specific signaling allows a network device to configure multiple terminal devices at once, thereby saving signaling overhead.

[0109] The above explains how to set resources, and the following explains how to check or trigger them.

[0110] In some embodiments, the terminal device determines the first reference signal resource and the second reference signal resource of M ports based on the RRC configuration, and determines that the CSI measurement resource is the first resource of M ports and the second resource of N ports. The terminal device can measure two resources simultaneously, which means that the terminal device measures resources corresponding to different port configurations of the same resource. The different port configurations correspond to different spatial domain element muting modes or spatial domain element configurations.

[0111] In some embodiments, the terminal device receives first information and / or second information, and determines, based on the first information and / or second information, to perform channel state information (CSI) measurement using a first reference signal resource of the M port and / or a second reference signal resource of the N port.

[0112] For example, the first information is carried by downlink control information (DCI) and / or a medium access control (MAC) control element (CE), the first information may be a group common signal, used to simultaneously transmit information to multiple terminal devices, and the second information is carried by radio resource control (RRC) signaling and / or a medium access control (MAC) control element (CE).

[0113] In this way, the terminal device can determine, for example, based on the DCI, whether the CSI measurement resource is the first resource of port M, the second resource of port N, or the first resource of port M and the second resource of port N. For example, after configuring the first reference signal resource and the second reference signal resource by RRC, the network device can further dynamically instruct the terminal device to perform CSI measurement by, for example, confirming, instructing, or triggering by DCI, thereby making the CSI measurement more efficient and accurate.

[0114] In some embodiments, the first information is used to indicate at least one of the following: a network state; a terminal device performing channel state information (CSI) measurements; a terminal device performing channel state information (CSI) measurements using a first reference signal resource of the M port; and a terminal device performing the following: a terminal device performing channel state information (CSI) measurements using a second reference signal resource of the N port; a CSI-RS resource configuration update / adjustment / switching; a CSI reporting configuration update / adjustment / switching; a CSI-RS port adjustment; a CSI-RS port activation / deactivation indication; a CSI-RS port enable indication; a CSI measurement adjustment; an indication regarding discontinuous reception; and an indication regarding discontinuous transmission.

[0115] In some embodiments, the second information is used to indicate at least one of the following: a timer / counter related to the network condition, a discontinuous receive period setting related to the network condition, and a discontinuous transmit period setting related to the network condition.

[0116] In some embodiments, the network state is used to indicate at least one of the following: a first mode, a second mode, a switch of the first mode to the second mode, a switch of the second mode to the first mode, a time domain element adjustment, a spatial domain element adjustment, or an energy domain element adjustment.

[0117] For example, the first mode is at least one of the following: energy saving mode, power saving mode, sleep mode, abnormal mode, inactive mode, the mode after the network device adjusts the CSI-RS port, and a first configuration method for the CSI-RS port; and the second mode is at least one of the following: non-energy saving mode, non-power saving mode, non-sleep mode, normal mode, active mode, the mode before the network device adjusts the CSI-RS port, and a second configuration method for the CSI-RS port.

[0118] Also, for example, the spatial domain element is used to indicate at least one of the following: an antenna port, a logical port, a reference signal port, an antenna factor, an antenna element, and an antenna unit. The energy domain element is used to indicate at least one of the following: an energy per resource element of a Physical Downlink Shared Channel (PDSCH) and an energy per resource element of a Channel State Information Reference Signal.

[0119] The above-described embodiments are merely illustrative of the present invention, and the present invention is not limited thereto. Furthermore, appropriate modifications can be made based on the above-described embodiments. For example, the above-described embodiments may be used individually, or a plurality of the above-described embodiments may be used in combination.

[0120] As can be seen from the above embodiment, a terminal device can obtain first reference signal resources for M ports and determine second reference signal resources for N ports, so that the terminal device can efficiently and accurately perform CSI measurements even when adjusting resources (e.g., for energy saving purposes), thereby providing accurate channel information for scheduling by network devices.

[0121] <Example of the second aspect> In the embodiment of the present invention, a reference signal resource configuration method is provided, and will be described from the perspective of a network device. Note that the description of the same content as in the embodiment of the first aspect will be omitted here.

[0122] 11 is a diagram illustrating a reference signal resource configuration method according to an embodiment of the present invention. As shown in FIG. 11, the method includes: 1101: A network device sends a first resource configuration, the first resource configuration including at least a first parameter, and the first parameter is used to configure a first reference signal resource of an M port; and 1102: The network device sends a second resource configuration and / or a channel state information (CSI) reporting configuration, in which at least the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is further used by the terminal device to determine second reference signal resources of N ports, in which N is less than M.

[0123] Note that the above-described FIG. 11 is merely an illustrative example of an embodiment of the present invention, and the present invention is not limited thereto. For example, the execution order of each operation may be appropriately adjusted, or some operations may be appropriately increased or decreased. Those skilled in the art may make appropriate modifications based on the above content, without being limited to the description of the above-described FIG. 11.

[0124] In some embodiments, the first reference signal resource and / or the second reference signal resource are at least time domain resources and / or frequency domain resources and / or spatial domain resources for transmitting or receiving reference signals, and the second reference signal resource of the N port is a part of the first reference signal resource of the M port.

[0125] In some embodiments, as shown in FIG. 11, the method further includes: 1103: The network device sends first information and / or second information, in which the first information and / or second information is also used by the terminal device to determine the first reference signal resource of the M port and / or the second reference signal resource of the N port.

[0126] In some embodiments, the first information is carried by downlink control information (DCI) and / or a medium access control (MAC) control element (CE), and the second information is carried by radio resource control (RRC) signaling and / or a medium access control (MAC) control element (CE).

[0127] In some embodiments, the first information is used to indicate at least one of the following: a network state; a terminal device performing channel state information (CSI) measurements; a terminal device performing channel state information (CSI) measurements using a first reference signal resource of the M port; and a terminal device performing the following: a terminal device performing channel state information (CSI) measurements using a second reference signal resource of the N port; a CSI-RS resource configuration update / adjustment / switching; a CSI reporting configuration update / adjustment / switching; a CSI-RS port adjustment; a CSI-RS port activation / deactivation indication; a CSI-RS port enable indication; a CSI measurement adjustment; an indication regarding discontinuous reception; and an indication regarding discontinuous transmission.

[0128] In some embodiments, the second information is used to indicate at least one of the following: a timer / counter related to the network condition, a discontinuous receive period setting related to the network condition, or a discontinuous transmit period setting related to the network condition.

[0129] The above-described embodiments are merely illustrative of the present invention, and the present invention is not limited thereto. Furthermore, appropriate modifications can be made based on the above-described embodiments. For example, the above-described embodiments may be used individually, or a plurality of the above-described embodiments may be used in combination.

[0130] As can be seen from the above embodiment, a terminal device can obtain first reference signal resources for M ports and determine second reference signal resources for N ports, so that the terminal device can efficiently and accurately perform CSI measurements even when adjusting resources (e.g., for energy saving purposes), thereby providing accurate channel information for scheduling by network devices.

[0131] <Example of the third aspect> In an embodiment of the present invention, a reference signal resource configuration device is provided. The device may be, for example, a terminal device, or may be one or more components or assemblies arranged in the terminal device. Note that, here, a description of the same content as in the embodiment of the first aspect will be omitted.

[0132] 12 is a block diagram of a reference signal resource configuration device according to an embodiment of the present invention. As shown in FIG. 12, the reference signal resource configuration device 1200 includes: A receiving unit 1201: receives a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port.

[0133] The receiving unit 1201 further receives a second resource configuration and / or a channel state information (CSI) reporting configuration, in which at least the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is further used by the terminal device to determine second reference signal resources of N ports, in which N is less than M.

[0134] In some embodiments, the first reference signal resource and / or the second reference signal resource are at least time domain resources and / or frequency domain resources and / or spatial domain resources for transmitting or receiving reference signals, and the second reference signal resource of the N port is a part of the first reference signal resource of the M port.

[0135] In some embodiments, the first parameter includes at least one of the following parameters: a port number, a parameter for determining a time-domain resource location, and a parameter for determining a frequency-domain resource location, where the parameter for determining a time-domain resource location is time-domain location information of a first OFDM symbol included in the first reference signal resource, and the parameter for determining a frequency-domain resource location is frequency-domain allocation information of the first reference signal resource.

[0136] In some embodiments, as shown in FIG. 12, the device further comprises: Processing unit 1202: Determine first reference signal resources of the M ports based on the first parameter, and determine second reference signal resources of the N ports based on the first parameter and a second parameter, where the second parameter is included in the first resource configuration and / or the CSI reporting configuration.

[0137] In some embodiments, the second parameter is used to indicate that N ports among the M ports of the first reference signal resource are the second reference signal resource, or the second parameter is used to indicate or enable resources corresponding to some ports among the first reference signal resources of the M ports as second reference signal resources of the N ports.

[0138] In some embodiments, the second parameter is X bits, and the X bits are used to indicate consecutive or non-consecutive N ports among the M ports.

[0139] In some embodiments, X is equal to M, and the second parameter is M bits, one bit of which corresponds to one of the M ports, and the bit indicates whether the time-frequency resource of the corresponding port belongs to the second reference signal resource of the N ports.

[0140] In some embodiments, X is smaller than M, and the first reference signal resources of the M ports include X port sets, the second parameter is X bits, one bit of which corresponds to one port set among the X port sets, and the bit indicates whether the time-frequency resources of the corresponding port set belong to the second reference signal resources of the N ports, and the port set is a CDM group or a predefined or pre-configured port set.

[0141] In some embodiments, a list of length L is predefined or preset, where each row in the list indicates a value for one of N ports among the M ports, and the X bits are used to indicate an index into the list, where X=log2(L).

[0142] In some embodiments, the second parameter is a SLIV parameter, the SLIV parameter is used to represent N consecutive ports among the M ports, and the second parameter is used to represent a starting port index and a port length of the consecutive N ports, or the second parameter is used to represent a starting port set index and a port set length of the consecutive N ports, and the port set is a CDM group or a predefined or preconfigured port set.

[0143] In some embodiments, the second parameter is a single value, and the value is used to indicate that some of the first reference signal resources of the M ports are second reference signal resources of the N ports.

[0144] In some embodiments, the second parameter is a numerical value or a proportional value, and the numerical value or proportional value is used to indicate that some of the first reference signal resources of the M ports are second reference signal resources of the N ports.

[0145] In some embodiments, the processing unit 1202 determines a first reference signal resource for the M ports based on the first parameter, and determines a second reference signal resource for the N ports based on the first parameter, a third parameter, and / or a fourth parameter, wherein the third parameter and / or the fourth parameter are included in the second resource configuration.

[0146] In some embodiments, the third parameter includes CSI-RS resource configuration index information including the second parameter and / or a reference resource, and the fourth parameter includes at least a parameter for determining a time domain location of a first OFDM symbol, a parameter for determining a time domain location of a second OFDM symbol, and a parameter for determining a frequency domain resource location.

[0147] In some embodiments, the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is carried by radio resource control (RRC) signaling and / or a medium access control (MAC) control element (CE).

[0148] In some embodiments, the receiving unit 1201 further receives first information and / or second information, and determines, based on the first information and / or second information, to perform channel state information (CSI) measurement using a first reference signal resource of the M port and / or a second reference signal resource of the N port.

[0149] In some embodiments, the first information is carried by downlink control information (DCI) and / or a medium access control (MAC) control element (CE), and the second information is carried by radio resource control (RRC) signaling and / or a medium access control (MAC) control element (CE).

[0150] In some embodiments, the first information is used to indicate at least one of the following: a network state; a terminal device performing channel state information (CSI) measurements; a terminal device performing channel state information (CSI) measurements using a first reference signal resource of the M port; and a terminal device performing the following: a terminal device performing channel state information (CSI) measurements using a second reference signal resource of the N port; a CSI-RS resource configuration update / adjustment / switching; a CSI reporting configuration update / adjustment / switching; a CSI-RS port adjustment; a CSI-RS port activation / deactivation indication; a CSI-RS port enable indication; a CSI measurement adjustment; an indication regarding discontinuous reception; and an indication regarding discontinuous transmission.

[0151] In some embodiments, the second information is used to indicate at least one of the following: a timer / counter related to the network condition, a discontinuous receive period setting related to the network condition, or a discontinuous transmit period setting related to the network condition.

[0152] The above-described embodiments are merely illustrative of the present invention, and the present invention is not limited thereto. Furthermore, appropriate modifications can be made based on the above-described embodiments. For example, the above-described embodiments may be used individually, or a plurality of the above-described embodiments may be used in combination.

[0153] Although only the components or modules related to the present invention have been described above, the present invention is not limited thereto. The reference signal resource configuration device 1200 may further include other components or modules, and the specific contents of these components or modules can be found in the related art.

[0154] 12 shows only the connection relationships or signal directions between each component or module for convenience, but as will be understood by those skilled in the art, various related technologies such as bus connection may be adopted. Each of the above-described components or modules may be realized by hardware such as a processor, a memory, a transmitter (device), a receiver (device), etc., and the present invention is not limited to these.

[0155] According to an embodiment of the present invention, a terminal device can acquire first reference signal resources for M ports and determine second reference signal resources for N ports, thereby enabling the terminal device to efficiently and accurately perform CSI measurements even when adjusting resources (e.g., for energy saving purposes), thereby providing accurate channel information for scheduling by network devices.

[0156] <Example of the fourth aspect> In an embodiment of the present invention, a reference signal resource configuration device is provided. The device may be, for example, a network device, or may be one or more components or assemblies disposed in the network device. Note that the description of the same content as in the embodiments of the first to third aspects will be omitted here.

[0157] 13 is a block diagram of a reference signal resource configuration device according to an embodiment of the present invention. As shown in FIG. 13, the reference signal resource configuration device 1300 includes: A sending unit 1301: sends a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port.

[0158] The transmitting unit 1301 further transmits a second resource configuration and / or a channel state information (CSI) reporting configuration, in which at least the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is further used by a terminal device to determine second reference signal resources of N ports, where N is less than M.

[0159] The above-described embodiments are merely illustrative of the present invention, and the present invention is not limited thereto. Furthermore, appropriate modifications can be made based on the above-described embodiments. For example, the above-described embodiments may be used individually, or a plurality of the above-described embodiments may be used in combination.

[0160] Although only the components or modules related to the present invention have been described above, the present invention is not limited thereto. The reference signal resource configuration device 1300 may further include other components or modules, and the specific contents of these components or modules can be found in the related art.

[0161] 13 shows only the connection relationships or signal directions between each component or module, but as will be understood by those skilled in the art, various related technologies such as bus connections may be employed. Each of the components or modules described above may be realized by hardware such as a processor, a memory, a transmitter (device), a receiver (device), etc., and the present invention is not limited to these.

[0162] According to an embodiment of the present invention, a terminal device can acquire first reference signal resources for M ports and determine second reference signal resources for N ports, thereby enabling the terminal device to efficiently and accurately perform CSI measurements even when adjusting resources (e.g., for energy saving purposes), thereby providing accurate channel information for scheduling by network devices.

[0163] <Example of the fifth aspect> An embodiment of the present invention further provides a communication system, which can be seen in Figure 1. Note that the description of the same contents as the embodiments of the first to fourth aspects will be omitted here.

[0164] In some embodiments, the communication system 100 may include at least the following: Network device 101: transmits a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port, and transmits a second resource configuration and / or a channel state information (CSI) reporting configuration; and Terminal device 102: Receive the first resource configuration, the second resource configuration, and / or the channel state information (CSI) reporting configuration, wherein at least the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is further used by the terminal device to determine second reference signal resources of N ports, where N is less than M.

[0165] In the embodiment of the present invention, a network device is further provided, which may be, for example, a base station, but the present invention is not limited thereto and may also be other network devices.

[0166] 14 is a block diagram of a network device according to an embodiment of the present invention. As shown in FIG. 14, the network device 1400 may include a processor 1410 (e.g., a central processing unit (CPU)) and a memory 1420, which is connected to the processor 1410. The memory 1420 can store various data and can also store a program 1430 for information processing, and can execute the program 1430 under the control of the processor 1410.

[0167] For example, the processor 1410 may be configured to execute a program to implement the reference signal resource configuration method described in the embodiments of the second aspect. For example, the processor 1410 may be configured to perform the following controls: send a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure first reference signal resources for M ports; and send a second resource configuration and / or a channel state information (CSI) reporting configuration, in which at least the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is further used by a terminal device to determine second reference signal resources for N ports, in which N is less than M.

[0168] 14, the network device 1400 may further include a transceiver 1440, an antenna 1450, etc., among which the functions of the above-mentioned components are the same as those of the prior art, and detailed description thereof will be omitted here. Note that the network device 1400 does not need to include all of the components shown in Fig. 14. The network device 1400 may further include components not shown in Fig. 14, but reference can be made to the prior art for this.

[0169] Although the embodiment of the present invention further provides a terminal device, the present invention is not limited to this and may further include other devices.

[0170] 15 is a diagram illustrating a terminal device according to an embodiment of the present invention. As shown in FIG. 15, the terminal device 1500 may include a processor 1510 and a memory 1520, where the memory 1520 stores data and programs and is connected to the processor 1510. Note that this diagram is merely an example, and other types of structures may be used to supplement or replace the structures to achieve telecommunications or other functions.

[0171] For example, the processor 1510 may be configured to execute a program to implement the reference signal resource configuration method described in the embodiments of the first aspect. For example, the processor 1510 may be configured to perform the following control: receive a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure first reference signal resources for M ports; and receive a second resource configuration and / or a channel state information (CSI) reporting configuration, in which at least the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is further used by the terminal device to determine second reference signal resources for N ports, in which N is less than M.

[0172] As shown in Fig. 15, the terminal device 1500 may further include a communication module 1530, an input unit 1540, a display 1550, a power supply 1560, etc. The functions of the above-mentioned components are the same as those of the prior art, and therefore detailed descriptions thereof will be omitted here. Note that the terminal device 1500 does not need to include all of the components shown in Fig. 15, and the above-mentioned components are not necessarily required. Furthermore, the terminal device 1500 may further include components not shown in Fig. 15, and reference can be made to the prior art for such components.

[0173] An embodiment of the present invention further provides a computer program, in which, when the program is executed in a terminal device, the program causes the terminal device to perform the reference signal resource configuration method described in the embodiment of the first aspect.

[0174] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program causes a terminal device to perform the reference signal resource configuration method described in the embodiment of the first aspect.

[0175] An embodiment of the present invention further provides a computer program, in which, when the program is executed in a network device, the program causes the network device to perform the reference signal resource configuration method described in the embodiment of the second aspect.

[0176] An embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program causes a network device to perform the reference signal resource configuration method described in the embodiment of the second aspect.

[0177] The above-described apparatus and methods may be realized by software or hardware, or by a combination of hardware and software. The present invention also relates to a computer-readable program as described below, which, when executed by a logic component, causes the logic component to realize the above-described apparatus or component, or to perform each of the above-described methods or steps. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, or a processing unit used in a computer. The present invention also relates to a storage medium, such as a hard disk, magnetic disk, optical hard disk, DVD, or flash memory, that stores the above-described program.

[0178] Furthermore, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be implemented as a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic component, a discrete gate or transistor logic component, a discrete hardware assembly, or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks illustrated in the figures and / or one or more combinations of the functional blocks may be further implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors communicatively coupled with a DSP, or any other configuration.

[0179] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and any modifications to the present invention that do not depart from the spirit of the present invention fall within the technical scope of the present invention.

[0180] Furthermore, with respect to the above-mentioned embodiments, the following supplementary notes are disclosed.

[0181] (Appendix 1) A reference signal resource configuration method, A terminal device receives a first resource configuration, the first resource configuration including at least a first parameter, and the first parameter is used to configure a first reference signal resource of an M port; and The terminal device receives a second resource configuration and / or a channel state information (CSI) reporting configuration; Wherein, the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is at least further used by the terminal device to determine second reference signal resources of N ports, where N is less than M.

[0182] (Appendix 2) 2. The method of claim 1, comprising: The first reference signal resource and / or the second reference signal resource are at least time domain resources and / or frequency domain resources and / or spatial domain resources for transmitting or receiving reference signals, and the second reference signal resource of the N ports is a part of the first reference signal resource of the M ports.

[0183] (Appendix 3) 2. The method of claim 1, comprising: The first parameter for configuring the first reference signal resource of the M port includes at least one of the following parameters: Number of ports (nrofPort) M, Parameters for determining time domain resource location; and A parameter for determining frequency domain resource location.

[0184] (Appendix 4) 4. The method of claim 3, The parameter for determining the time domain resource location is time domain location information (firstOFDMSymbolInTimeDomain) of a first OFDM symbol included in the first reference signal resource; The parameter for determining the frequency domain resource location is frequency domain allocation information (frequencyDomainAllocation) of the first reference signal resource.

[0185] (Appendix 5) 5. The method of any one of claims 1 to 4, further comprising: The terminal device determines a first reference signal resource of the M port based on the first parameter; and The terminal device determines a second reference signal resource of the N ports according to the first parameter and the second parameter; Wherein the second parameter is included in the first resource configuration and / or the CSI reporting configuration.

[0186] (Appendix 6) 6. The method of claim 5, the second parameter is used to indicate that N ports among the M ports of the first reference signal resource are the second reference signal resource; or The second parameter is used to indicate or enable resources corresponding to some ports among the first reference signal resources of the M ports as second reference signal resources of the N ports.

[0187] (Appendix 7) 7. The method of claim 6, The second parameter is X bits, and the X bits are used to indicate consecutive or non-consecutive N ports among the M ports.

[0188] (Appendix 8) 8. The method of claim 7, X is equal to M, and the second parameter is M bits, one bit of which corresponds to one of the M ports, and the bit is used to indicate whether the time-frequency resource of the corresponding port belongs to the second reference signal resource of the N ports.

[0189] (Appendix 9) 8. The method of claim 7, X is smaller than M, and the first reference signal resource of the M ports includes X port sets, and the second parameter is X bits, one bit of which corresponds to one port set among the X port sets, and the bit is used to indicate whether the time-frequency resource of the corresponding port set belongs to the second reference signal resource of the N ports.

[0190] (Appendix 10) 10. The method of claim 9, The set of ports may be a CDM group or a predefined or preconfigured set of ports.

[0191] (Appendix 11) 8. The method of claim 7, predefining or presetting a list of length L, each row in the list representing a value for one of N ports among the M ports; The X bits are used to indicate an index in the list, where X=log2(L).

[0192] (Appendix 12) 7. The method of claim 6, The second parameter is a SLIV parameter, which is used to represent consecutive N ports among the M ports.

[0193] (Appendix 13) 13. The method of claim 12, The second parameter is used to represent the index of the starting port of the consecutive N ports and the length of the ports.

[0194] (Appendix 14) 13. The method of claim 12, The second parameter is used to represent the index of a starting port set of the consecutive N ports and the length of the port set.

[0195] (Appendix 15) 15. The method of claim 14, The set of ports may be a CDM group or a predefined or preconfigured set of ports.

[0196] (Appendix 16) 7. The method of claim 6, The second parameter is a single value, and the value is used to indicate that some of the first reference signal resources of the M ports are second reference signal resources of the N ports.

[0197] (Appendix 17) 7. The method of claim 6, The second parameter is a numerical value or a proportional value, and the numerical value or proportional value is used to indicate that some of the first reference signal resources of the M ports are second reference signal resources of the N ports.

[0198] (Appendix 18) 5. The method of any one of claims 1 to 4, further comprising: The terminal device determines a first reference signal resource of the M port based on the first parameter; and The terminal device determines a second reference signal resource of the N ports according to the first parameter and the third parameter; Wherein the third parameter is included in the second resource configuration.

[0199] (Appendix 19) 19. The method of claim 18, The third parameter includes CSI-RS resource configuration index information including the second parameter and / or a reference resource.

[0200] (Appendix 20) 5. The method of any one of claims 1 to 4, further comprising: The terminal device determines a first reference signal resource of the M port based on the first parameter; and The terminal device determines a second reference signal resource of the N ports according to the first parameter and the fourth parameter; The fourth parameter is included in the second resource configuration.

[0201] (Appendix 21) 21. The method of claim 20, The fourth parameter is used to indicate the time-frequency location of the second reference signal resource of the N ports, and includes at least: a parameter (firstOFDMSymbolInTimeDomain) that determines the time domain position of the first OFDM symbol; a parameter (secondOFDMSymbolInTimeDomain) that determines the time domain location of the second OFDM symbol; and Including a parameter (frequencyDomainAllocation) that determines the frequency domain resource location.

[0202] (Appendix 22) 22. The method of any one of claims 1 to 21, comprising: The first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is carried by radio resource control (RRC) signaling and / or a medium access control (MAC) control element (CE).

[0203] (Appendix 23) 23. The method of any one of claims 1 to 22, comprising: The second reference signal resource of the N port is configured by UE-specific signaling, or by cell-specific signaling, or by group-specific signaling.

[0204] (Appendix 24) 24. The method of any one of claims 1 to 23, further comprising: The terminal device receives the first information and / or the second information; and determining, based on the first information and / or the second information, to perform channel state information (CSI) measurements using a first reference signal resource of the M port and / or a second reference signal resource of the N port.

[0205] (Appendix 25) 25. The method of claim 24, the first information is carried by downlink control information (DCI) and / or a medium access control (MAC) control element (CE); The second information is carried by radio resource control (RRC) signaling and / or a medium access control (MAC) control element (CE).

[0206] (Appendix 26) 25. The method of claim 24, The first information is used to indicate at least one of the following: a network state; a terminal device performing channel state information (CSI) measurements; a terminal device performing channel state information (CSI) measurements using a first reference signal resource of the M port; and a terminal device performing the following: a terminal device performing channel state information (CSI) measurements using a second reference signal resource of the N port; a CSI-RS resource configuration update / adjustment / switching; a CSI reporting configuration update / adjustment / switching; a CSI-RS port adjustment; a CSI-RS port activation / deactivation indication; a CSI-RS port enable indication; a CSI measurement adjustment; an indication regarding discontinuous reception; and an indication regarding discontinuous transmission. The second information is used to indicate at least one of the following: a timer / counter related to a network condition, a discontinuous receive period setting related to a network condition, and a discontinuous transmit period setting related to a network condition.

[0207] (Appendix 27) 27. The method of claim 26, The network state indicates at least one of the following: a first mode, a second mode, a switch of the first mode to the second mode, a switch of the second mode to the first mode, an adjustment of a time domain element, an adjustment of a spatial domain element, and an adjustment of an energy domain element.

[0208] (Appendix 28) 28. The method of claim 27, The first mode is at least one of the following: energy saving mode, power saving mode, sleep mode, abnormal mode, inactive mode, a mode after the network device adjusts the CSI-RS port, and a first configuration method for the CSI-RS port; and the second mode is at least one of the following: non-energy saving mode, non-power saving mode, non-sleep mode, normal (usual) mode, active mode, a mode before the network device adjusts the CSI-RS port, and a second configuration method for the CSI-RS port. The spatial domain element is used to indicate at least one of the following: an antenna port, a logical port, a reference signal port, an antenna factor, an antenna element, and an antenna unit; and the energy domain element is used to indicate at least one of the following: an energy per resource element of a Physical Downlink Shared Channel (PDSCH), and an energy per resource element of a Channel State Information Reference Signal. (Appendix 29) A reference signal resource configuration method, The network device sends a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port; and the network device transmitting a second resource configuration and / or a channel state information (CSI) reporting configuration; Wherein, the first resource configuration, the second resource configuration, or the channel state information (CSI) reporting configuration is at least further used by the terminal device to determine second reference signal resources of N ports, where N is less than M.

[0209] (Appendix 30) 29. The method of claim 29, The first reference signal resource and / or the second reference signal resource are at least time domain resources and / or frequency domain resources and / or spatial domain resources for transmitting or receiving reference signals, and the second reference signal resource of the N ports is a part of the first reference signal resource of the M ports.

[0210] (Appendix 31) 31. The method according to claim 29 or 30, The second reference signal resource of the N port is configured by UE-specific signaling, or by cell-specific signaling, or by group-specific signaling.

[0211] (Appendix 32) 29. The method of claim 29, further comprising: the network device transmitting the first information and / or the second information; Wherein, the first information and / or the second information is used by the terminal device to determine the first reference signal resource of the M port and / or the second reference signal resource of the N port.

[0212] (Appendix 33) 33. The method of claim 32, the first information is carried by downlink control information (DCI) and / or a medium access control (MAC) control element (CE); The second information is carried by radio resource control (RRC) signaling and / or a medium access control (MAC) control element (CE).

[0213] (Appendix 34) 34. The method of claim 33, The first information is used to indicate at least one of the following: a network state; a terminal device performing channel state information (CSI) measurements; a terminal device performing channel state information (CSI) measurements using a first reference signal resource of the M port; and a terminal device performing the following: a terminal device performing channel state information (CSI) measurements using a second reference signal resource of the N port; a CSI-RS resource configuration update / adjustment / switching; a CSI reporting configuration update / adjustment / switching; a CSI-RS port adjustment; a CSI-RS port activation / deactivation indication; a CSI-RS port enable indication; a CSI measurement adjustment; an indication regarding discontinuous reception; and an indication regarding discontinuous transmission. The second information is used to indicate at least one of the following: a timer / counter related to a network condition, a discontinuous receive period setting related to a network condition, and a discontinuous transmit period setting related to a network condition.

[0214] (Appendix 35) A terminal device, a memory and a processor; The storage device stores a computer program, The processor is configured to execute the computer program to implement the reference signal resource configuration method described in any one of Supplementary Notes 1 to 28.

[0215] (Appendix 36) A network device, a memory and a processor; The storage device stores a computer program, The processor is configured to execute the computer program to perform the reference signal resource configuration method described in any one of Supplementary Notes 29 to 34.

Claims

1. A reference signal resource configuration device, a receiving unit, The receiving unit receives a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port; The receiving unit further receives a second resource configuration and / or a channel state information reporting configuration; The first resource configuration, the second resource configuration, or the channel state information reporting configuration is at least further used by a terminal device to determine second reference signal resources of N ports, where N is less than M.

2. 10. The apparatus of claim 1, The device, wherein the first reference signal resource and / or the second reference signal resource are at least time domain resources and / or frequency domain resources and / or spatial domain resources for transmitting or receiving reference signals, and the second reference signal resource of the N ports is part of the first reference signal resource of the M ports.

3. 10. The apparatus of claim 1, The first parameter includes at least one of the following parameters: a number of ports, a parameter for determining a time domain resource location, and a parameter for determining a frequency domain resource location; The parameter for determining the time domain resource location is time domain location information of a first OFDM symbol included in the first reference signal resource, and the parameter for determining the frequency domain resource location is frequency domain allocation information of the first reference signal resource.

4. 10. The apparatus of claim 1, further comprising a processing unit; The processing unit determining a first reference signal resource of the M port based on the first parameter; and determining a second reference signal resource of the N ports based on the first parameter and the second parameter; The second parameter is included in the first resource configuration and / or the channel state information reporting configuration.

5. 5. The apparatus of claim 4, the second parameter is used to indicate that N ports among the M ports of the first reference signal resource are the second reference signal resource; or The device, wherein the second parameter is used to indicate or enable resources corresponding to some ports among the first reference signal resources of the M ports as second reference signal resources of the N ports.

6. 6. The apparatus of claim 5, The apparatus, wherein the second parameter is X bits, and the X bits are used to represent consecutive or non-consecutive N ports of the M ports.

7. 7. The apparatus of claim 6, The apparatus, wherein X is equal to M, the second parameter is M bits, one bit of which corresponds to one port among the M ports, and the bit is used to indicate whether the time-frequency resource of the corresponding port belongs to the second reference signal resource of the N ports.

8. 7. The apparatus of claim 6, wherein X is smaller than M, the first reference signal resource of the M ports includes X port sets, the second parameter is X bits, one bit of which corresponds to one port set among the X port sets, the bit is used to indicate whether the time-frequency resource of the corresponding port set belongs to the second reference signal resource of the N ports, and the port set is a CDM group or a predefined or pre-configured port set.

9. 7. The apparatus of claim 6, An apparatus that predefines or pre-sets a list of length L, where each row in the list indicates a value for one of N ports among the M ports, and where the X bits are used to indicate an index into the list, where X=log2(L).

10. 6. The apparatus of claim 5, the second parameter is an SLIV parameter, and the SLIV parameter is used to indicate consecutive N ports among the M ports; the second parameter is used to indicate the index of the starting port and the length of the ports of the consecutive N ports; or The apparatus, wherein the second parameter is used to indicate an index of a starting port set of the consecutive N ports and a length of the port set, and the port set is a CDM group or a predefined or preconfigured port set.

11. 6. The apparatus of claim 5, An apparatus, wherein the second parameter is a single value, and the value is used to indicate that some of the first reference signal resources of the M ports are second reference signal resources of the N ports.

12. 6. The apparatus of claim 5, An apparatus, wherein the second parameter is a numerical value or a proportional value, and the numerical value or proportional value is used to indicate that some of the first reference signal resources of the M ports are second reference signal resources of the N ports.

13. 10. The apparatus of claim 1, further comprising a processing unit; The processing unit determining a first reference signal resource of the M port based on the first parameter; and determining a second reference signal resource of the N ports based on the first parameter, the third parameter, and / or the fourth parameter; The third parameter and / or the fourth parameter are included in the second resource configuration.

14. 14. The apparatus of claim 13, The third parameter includes channel state information reference signal resource configuration index information including the second parameter and / or reference resource; The fourth parameters include at least a parameter determining a time domain location of a first OFDM symbol, a parameter determining a time domain location of a second OFDM symbol, and a parameter determining a frequency domain resource location.

15. 10. The apparatus of claim 1, The apparatus, wherein the first resource configuration, the second resource configuration, or the channel state information reporting configuration is carried by radio resource control signaling and / or a medium access control control element.

16. 10. The apparatus of claim 1, The receiving unit further comprises: receiving the first information and / or the second information; and An apparatus used to determine, based on the first information and / or second information, to perform channel state information measurement using the first reference signal resource of the M port and / or the second reference signal resource of the N port.

17. 17. The apparatus of claim 16, The apparatus, wherein the first information is carried by downlink control information and / or a medium access control control element, and the second information is carried by radio resource control signaling and / or a medium access control control element.

18. 17. The apparatus of claim 16, The first information is used to indicate at least one of the following: a network state; a terminal device performing a channel state information (CSI) measurement; a terminal device performing a channel state information (CSI) measurement using a first reference signal resource of the M port; and a terminal device performing the following: performing a channel state information (CSI) measurement using a second reference signal resource of the N port; CSI-RS resource configuration update / adjustment / switching; CSI report configuration update / adjustment / switching; CSI-RS port adjustment; CSI-RS port activation / deactivation indication; CSI-RS port enable indication; CSI measurement adjustment; an indication regarding discontinuous reception; and an indication regarding discontinuous transmission. The device, wherein the second information is used to indicate at least one of the following: a timer / counter related to a network condition; a discontinuous receive period setting related to a network condition; and a discontinuous transmit period setting related to a network condition.

19. A reference signal resource configuration device, a transmitting unit; The transmitting unit transmits a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of an M port; The transmitting unit further transmits a second resource configuration and / or a channel state information report configuration; The first resource configuration, the second resource configuration, or the channel state information reporting configuration is at least further used by a terminal device to determine second reference signal resources of N ports, where N is less than M.

20. A communication system including a network device and a terminal device, The network device includes: Sending a first resource configuration, the first resource configuration including at least a first parameter, the first parameter being used to configure a first reference signal resource of the M port; and Sending a second resource configuration and / or a channel state information reporting configuration; The terminal device is A communication system comprising: a first resource configuration, a second resource configuration, and / or a channel state information reporting configuration; and a terminal device, wherein the first resource configuration, the second resource configuration, or the channel state information reporting configuration is further used by the terminal device to determine second reference signal resources of N ports, where N is less than M.

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