Method and apparatus for calculating channel state information, and communication system

Abstract

Provided in the embodiments of the present application are a method and apparatus for calculating channel state information, and a communication system. The method comprises: at least receiving channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information comprises M pieces of configuration sub-information, M being an integer greater than or equal to 1; and performing CSI calculation and reporting at least on the basis of related symbols on a first antenna port related to at least one of the M pieces of configuration sub-information.

Description

Method, device and communication system for calculating channel state information Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] As fifth-generation (5G) communication networks become more widespread across industries and are deployed in more geographic areas, they require very high data rates and denser networks to handle more advanced services. These networks utilize more antennas, greater bandwidth, and more frequency bands, resulting in increasing energy consumption for 5G devices. According to operator statistics, the average energy consumption of a 5G base station exceeds three times that of an LTE (Long Term Evolution) base station. Nearly 50% of the cost of deploying a 5G network for operators comes from electricity costs. Furthermore, 5G base stations consume significant energy even during periods of inactivity. Therefore, network energy conservation is crucial for improving environmental sustainability, reducing environmental impact (e.g., greenhouse gas emissions), and saving operating costs. Energy conservation in 5G networks is a pressing issue that needs to be addressed.

[0003] To achieve network energy conservation, Release 18 (Rel-18) launched a project to research various energy-saving technologies related to network energy conservation. During the discussion, network energy conservation technologies can be categorized into time, frequency, spatial, and energy domains. Examples of spatial energy conservation include dynamically adjusting the number of antennas, dynamically adjusting data transmission power, and introducing discontinuous transmission (DTX) / discontinuous reception (DRX) in cells.

[0004] Using various energy-saving technologies can save a lot of energy for network devices, but at the same time, it can also have a negative impact on other processes or technologies in the communication system and cause certain compatibility issues with the configuration methods in existing standards. For example, in NR (new radio) energy-saving scenarios, the terminal side needs to measure and report CSI information of one or more energy-saving sub-configurations based on existing or enhanced CSI resource configurations to provide sufficient CSI reporting for data transmission for energy-saving purposes by the base station.

[0005] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art.

[0006] Summary of the Invention

[0007] The inventors discovered that the current CSI reporting mechanism cannot support reporting of multiple CSI information for one or more sub-configurations. Therefore, how a terminal device performs joint channel measurement and reporting for one or more sub-configurations has become an urgent problem to be solved in network energy-saving technology.

[0008] In response to at least one of the above problems or other similar problems, embodiments of the present application provide a method, apparatus, and communication system for calculating channel state information.

[0009] According to one aspect of an embodiment of the present application, a method for calculating channel state information is provided, which is applied to a terminal device. The method includes:

[0010] receiving at least channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1; and

[0011] The CSI is calculated and reported based on relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information.

[0012] According to another aspect of an embodiment of the present application, there is provided an apparatus for calculating channel state information, configured in a terminal device, the apparatus comprising:

[0013] a receiving unit configured to receive at least channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1; and

[0014] A processing unit is configured to calculate and report CSI based on at least relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information.

[0015] According to another aspect of an embodiment of the present application, a communication system is provided, which includes a network device and a terminal device, wherein the terminal device has the aforementioned device for calculating channel state information.

[0016] One of the beneficial effects of the embodiments of the present application is that CSI is calculated and reported based on relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information of the CSI reporting configuration information, thereby accurately obtaining CSI, thereby improving data transmission performance and improving single-user and overall network throughput.

[0017] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0018] 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, combined with features in other embodiments, or substituted for features in other embodiments.

[0019] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0021] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0022] FIG2 is a schematic diagram of an energy-saving scenario according to an embodiment of the present application;

[0023] FIG3 is a schematic diagram of a method for calculating channel state information according to an embodiment of the present application;

[0024] FIG4 is a schematic diagram of a first antenna port according to an embodiment of the present application;

[0025] FIG5 is a schematic diagram of an implementation of 302 according to an embodiment of the present application;

[0026] FIG6 is a schematic diagram of a device for calculating channel state information according to an embodiment of the present application;

[0027] FIG7 is a schematic diagram of a network device according to an embodiment of the present application;

[0028] FIG8 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0030] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0031] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0032] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0033] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and / or other communication protocols currently known or to be developed in the future.

[0034] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0035] Among them, base stations may include but are not limited to: NodeB (NodeB or NB), evolved NodeB (eNodeB or eNB) and 5G base station (gNB), IAB host, etc., and may also include remote radio head (RRH, Remote Radio Head), remote radio unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femeto, pico, etc.). The term "base station" can include some or all of their functions. Each base station can provide communication coverage for a specific geographical area. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0036] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can 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, and so on.

[0037] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0038] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0039] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0040] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0041] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application, schematically illustrating a situation using a terminal device and a network device as an example. As shown in FIG1 , a communication system 100 may include a network device 101 and terminal devices 102 and 103. For simplicity, FIG1 illustrates only two terminal devices and one network device as an example, but the embodiments of the present application are not limited thereto.

[0042] In the embodiment of the present application, existing services or future services can be transmitted between the network device 101 and the terminal devices 102 and 103. For example, these services may include but are not limited to: enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC), etc.

[0043] It is worth noting that FIG1 shows that both terminal devices 102 and 103 are within the coverage range of network device 101, but the present application is not limited thereto. Both terminal devices 102 and 103 may not be within the coverage range of network device 101, or one terminal device 102 may be within the coverage range of network device 101 while the other terminal device 103 is outside the coverage range of network device 101.

[0044] In the embodiments of the present application, the high-layer signaling may be, for example, radio resource control (RRC) signaling; for example, an RRC message, including, for example, a master information block (MIB), system information, or a dedicated RRC message; or an RRC information element (RRC IE). The high-layer signaling may also be, for example, MAC (Medium Access Control) signaling; or a MAC control element (MAC CE). However, the present application is not limited thereto.

[0045] In an embodiment of the present application, in a mobile communication system, a terminal device typically measures channel state information (CSI) based on instructions and configurations from a network device, and reports the measured CSI to the network device. When scheduling the terminal device, the network device may refer to the CSI to schedule the terminal device for transmission using an appropriate transmission method on appropriate physical resources. Different terminal devices may experience different physical channel conditions, and the use of a CSI feedback mechanism can rationally and effectively utilize physical resources, thereby improving the efficiency of overall network transmission.

[0046] In the NR CSI feedback mechanism, the terminal device primarily measures and reports reference signals based on the CSI configuration. Reference signals include CSI-RS (Channel State Information-Reference Signal) and SSB (Synchronization Signal Block). NR CSI configuration consists of two main parts: the first part is the network equipment configuring the reference resources for CSI measurement for the terminal device (CSI-RS resource configuration); the second part is the network equipment configuring the terminal device how to report CSI (CSI reporting configuration).

[0047] For example, the CSI-RS resource configuration can be used for interference measurement and CSI channel measurement. Each CSI-RS resource configuration contains S resource sets. Each resource set contains Ks CSI-RS resources (i.e., N CSI-RS resources described below). Aperiodic resource configurations can contain one or more resource sets. For periodic and semi-persistent resource configurations, only one resource set can be included when used for CSI acquisition.

[0048] Among them, the value of Ks is:

[0049] When used for CSI channel measurement, if the codebook type in the reporting setting is 'Type I' (specifically, it may include CodebookType='TypeISinglePanle' or 'TypeIMultiPanle'), Ks<=32.

[0050] When used for CSI channel measurement, if the codebook type in the reporting setting is 'Type II' (specifically, it may include CodebookType = 'typeII', 'typeII-PortSelection', 'typeII-r16', 'typeII-PortSelection-r16', 'typeII-PortSelection-r17'), Ks = 1. This is mainly because the computational complexity of Type II is relatively large and poses a greater computational challenge to the terminal device. Therefore, the NR system reduces the computational complexity of the terminal device by limiting the value of Ks.

[0051] A CSI report consists of two parts: Part 1 and Part 2. Part 1 (also referred to as Part 1) has a fixed payload size and indicates the number of information bits in Part 2 (also referred to as Part 2). In CSI reporting, if the current CSI measurement is used for CSI channel measurement, the following reporting content is specified based on the codebook type:

[0052] Type I CSI: Part 1 includes RI (Rank Indicator) / CSI-RS Resource Index (CSI-RS Resource Index) and the CQI (Channel Quality Indicator) of the first CW (Code Word); Part 2 includes LI (Layer Indicator) and PMI (Precoding Matrix Indicator), and also includes the CQI of the second CW when the rank is greater than 4;

[0053] Type II CSI: Part 1 includes RI, CQI, and the number of non-zero wideband amplitude coefficients per layer; Part 2 includes LI and PMI.

[0054] In the NR system, the UE can perform channel state measurement based on the received non-zero power (NZP) CSI-RS resources, and report feedback based on the reporting amount configuration in the reporting setting. When the reporting amount includes the CQI (Channel Quality Indication) configuration, the UE can jointly calculate and report the CQI information by the current channel estimation result and the CQI calculation assumption in the standard. The specific calculation process on the UE side is as follows (it should be noted that the following content is only a specific example of the calculation process, and the calculation process on the UE side can also be other content):

[0055] 1) The UE estimates the current channel estimate H through the CSI-RS;

[0056] 2) The UE calculates the optimal precoding information W through the channel estimation H;

[0057] 3) The UE calculates the current SINR (Signal to Interference and Noise Ratio) by weighting the channel estimation result H using the precoding information W;

[0058] 4) The UE fits the modulation order and SINR curve based on the current SINR calculation result, and calculates and reports the optimal CQI based on the CQI quantization definition in the standard.

[0059] According to the above UE calculation process, CQI calculation is to reflect the channel quality information of the actual channel transmission of the physical downlink shared channel (PDSCH). Therefore, when calculating the CQI, the UE needs to map the PDSCH signal received and transmitted on antenna ports [1000,…,1000+ν-1] with the related signals (related symbols) transmitted on antenna ports [3000,…,3000+P-1] (since the CSI-RS signal starts transmission at port 3000, the related signals here specifically refer to the CSI-RS signal), where P is the number of antenna ports. For example, when calculating the CQI, the mapping relationship based on single-point transmission in the NR system is shown in Table 1.

[0060] Table 1: Mapping relationship based on single-point transmission in NR system

[0061] Where x(i)=[x (0) (i)...x (ν-1) (i)] T = ... (3000) (i)...y(3000+P-1)(i)]T Indicates the signal information of the ports corresponding to P CSI-RSs.

[0062] As can be seen from the above formula, there is a precoding mapping relationship between the channel state information calculated by CSI-RS and the actual PDSCH transmission port. Therefore, when the UE calculates the CQI, it is necessary to calculate the precoding information in advance and calculate and feedback the channel quality information (CQI) of the assumed PDSCH transmission channel based on the weighted precoding calculation according to the current mapping relationship.

[0063] The current standard defines port index values ​​for CSI-RS with different numbers of ports. For example, the port index values ​​for 2-antenna ports are [3000, 3001], the port index values ​​for 4-antenna ports are [3000, 3001, 3002, 3003], the port index values ​​for 8-antenna ports are [3000, 3001, …, 3007], the port index values ​​for 12-antenna ports are [3000, 3001, …, 3011], the port index values ​​for 16-antenna ports are [3000, 3001, …, 3015], and the port index values ​​for 22-antenna ports are [3000, 3001, …, 3031].

[0064] In NR energy-saving scenarios, the enhanced CSI resource configuration is associated with one or more sub-configurations in the CSI reporting configuration. That is, the terminal side can measure and report CSI information of one or more energy-saving sub-configurations based on the enhanced CSI resource configuration. This provides sufficient channel state information reporting for data transmission for energy-saving purposes by the base station.

[0065] For a CSI resource enhancement method 1 for the purpose of energy saving, one or more CSI-RS resources in a CSI-RS resource set for channel measurement can be associated with the same sub-configuration provided in the CSI reporting configuration. That is, a sub-configuration in the CSI reporting configuration can be associated with one or more CSI-RS resources for channel measurement in a CSI-RS resource set; wherein the resources in the resource set for channel measurement have the same number of antenna ports.

[0066] For a CSI resource enhancement method 2 for the purpose of energy saving, one or more CSI-RS resources in a CSI-RS resource set for channel measurement can be associated with multiple sub-configurations provided in the CSI report configuration, each CSI-RS resource is associated with all sub-configurations, and the resources in the resource set for channel measurement have the same number of antenna ports.

[0067] In the prior art, CSI-RS resource configuration is a semi-static configuration by RRC, and the number of CSI-RS ports and time-frequency positions do not change over a long period of time.

[0068] In order to achieve the goal of network energy saving, a feasible solution is that network equipment can adjust the antenna configuration used to serve terminal devices according to the real-time needs of the network, such as the number of antenna elements, antenna ports, etc.

[0069] Figure 2 is a schematic diagram of an energy-saving scenario in an embodiment of the present application. As shown in Figure 2, network energy-saving related spatial / energy domain element adjustment technologies can be divided into two types:

[0070] The left side of Figure 2 is called Type 1 adjustment. For example, corresponding to energy-saving scenario 1, all antennas (factors) associated with a logical antenna port (also known as a digital antenna port, antenna port, or port) are enabled or disabled. In this method, the network device can disable all antennas (factors) corresponding to one or more antenna ports. After disabling, the transmission power of each port remains unchanged, but the total number of antenna ports is reduced. Therefore, this adjustment directly affects the number of antenna ports, and thus the transmission power of the reference signal.

[0071] The right side of Figure 2 is called Type 2 adjustment. For example, corresponding to energy-saving scenario 2, some antenna factors associated with a logical antenna port are enabled or disabled. In this method, the network device can disable some antennas (factors) corresponding to all antenna ports. After disabling, the number of antenna ports remains unchanged, but the transmission power of each port is reduced. Therefore, this adjustment affects the beamforming gain of the network device and, in turn, the transmission power of the reference signal.

[0072] As shown in Figure 2, energy-saving scenario 1 achieves network energy saving by shutting down some digital antenna ports. On the terminal device side, after shutting down different numbers of antenna ports, the terminal device needs to perform measurements based on the different numbers of ports to generate CSI information under different digital ports. Therefore, the 'nrofports' in the CSI resource configuration and / or N1N2 in the reporting settings may have different values ​​under different energy-saving configurations. Therefore, the number of antenna port dimensions in the PMI matrix in the CSI reported under different energy-saving sub-configurations is different. The most common method for energy-saving scenario 1 is to distinguish different antenna port sub-configurations through the antenna port indication within a CSI-RS resource. For example, different antenna port subsets in the CSI-RS resource may correspond to different antenna port shutdown configurations.

[0073] As shown in Figure 2, in energy-saving scenario 2, the number of TXRU (transceiver unit) / RF antennas is dynamically adjusted without adjusting the number of digital antenna ports to achieve network energy saving. Therefore, in this case, the 'nrofports' in the CSI resource configuration and / or the N1N2 in the reporting settings under different energy-saving sub-configurations may remain unchanged, and the number of antenna port dimensions in the PMI matrix in the reported CSI remains unchanged, so it may be protocol transparent on the terminal device side. In the most common energy-saving scenario 2, different energy-saving sub-configurations can be distinguished by different CSI-RSs, such as different resources can correspond to the closure of different energy-saving sub-configurations.

[0074] In particular, in energy-saving scenario 2, it can be seen from the CSI-RS resource configuration enhancement method 2 of the prior art that each sub-configuration must include at least one or more CSI-RS resource information, such as a CSI-RS resource ID (identifier) ​​list. The list can include one CSI-RS resource ID, or multiple CSI-RS resource IDs. Therefore, one sub-configuration can be associated with at least one CSI-RS resource ID.

[0075] Then, based on the CQI calculation assumptions in the current standard, when transmitting based on non-energy-saving scenarios, only the mapping relationship between all ports of a CSI-RS resource and the PDSCH port is specified, and the precoding information W is a single information. However, in energy-saving scenario one, different sub-configurations correspond to different port subsets of all ports, and each sub-configuration corresponds to all PDSCH ports. Therefore, the current mapping relationship is not sufficient to reflect the port correspondence relationship in the actual energy-saving scenario. Under the current PMI and CQI calculation assumptions, the PMI and CQI information calculated by the UE based on the existing technology cannot accurately and completely reflect the quality of the actual channel experienced by the resource port in the energy-saving scenario, thereby reducing the accuracy and reliability of data scheduling, resulting in a decrease in data transmission performance, and a decrease in single-user and overall network throughput.

[0076] In response to at least one of the above problems, embodiments of the present application provide a method, apparatus, and communication system for calculating channel state information.

[0077] Embodiments of the first aspect

[0078] The present invention provides a method for calculating channel state information, which is described from the perspective of a terminal device. FIG3 is a schematic diagram of the method for calculating channel state information according to an embodiment of the present invention. As shown in FIG3 , the method includes:

[0079] 301, receiving at least channel state information (CSI) reporting configuration information, where the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1;

[0080] 302 : Calculate and report CSI based on relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information.

[0081] According to the above embodiment, CSI is calculated and reported based on relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information of the CSI reporting configuration information. As a result, CSI can be accurately obtained, thereby improving data transmission performance and improving single-user and overall network throughput.

[0082] It is worth noting that FIG3 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG3 above.

[0083] In some embodiments, the CSI information includes at least: CQI (channel quality information) information and / or PMI (Precoder matric index) information.

[0084] In some embodiments, as shown in FIG3 , the method further includes:

[0085] 303. Receive CSI-RS resource configuration information, where the CSI-RS resource configuration information at least includes port number indication information (nrofports).

[0086] In some embodiments, the CSI-RS resource configuration information is used to configure at least one CSI-RS resource set, wherein one CSI-RS resource set in the at least one CSI-RS resource set configured by the CSI-RS resource configuration information includes N CSI-RS resources, where N is an integer greater than or equal to 1. The CSI-RS resources may be time-frequency resources, etc.

[0087] In some embodiments, the port number indication information (nrofports) is used to indicate the port number Q configured for each CSI-RS resource in the CSI-RS resource set. The port number Q may be an integer less than or equal to 32. The present application is not limited thereto, and the port number may also be an integer greater than 32.

[0088] In some embodiments, the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1. The M sub-configuration information is used to configure M energy-saving sub-configurations (or sub-configurations). Thus, the terminal device can determine the CSI-RS resources for performing CSI channel measurement for each energy-saving sub-configuration based on the CSI-RS resource configuration information and the CSI reporting configuration information. In addition, the M sub-configuration information can indicate the reporting method (for example, bit width, etc.) of the CRI in the CSI report corresponding to the M energy-saving sub-configurations. Thus, the terminal device can determine the specific form of the CRI in the CSI report reported to the network device based on the CSI-RS resource configuration information and / or the CSI reporting configuration information.

[0089] In some embodiments, in some energy-saving scenarios, for example, energy-saving scenario 1, each CSI-RS resource in a CSI-RS resource set may correspond to M antenna port configurations, where one antenna port configuration corresponds to one sub-configuration.

[0090] For example, for a CSI-RS resource set, the CSI-RS resource set is configured with 4 CSI-RS resources, and each CSI-RS resource can be configured with a maximum of 32 antenna ports. Taking the number of antenna ports (nrofports) as 8, M=3 as an example, three types of antenna ports can be configured for each CSI-RS resource, for example, 8 ports, 4 ports, and 2 ports. Among them, the first sub-configuration can be: 4 CSI-RS resources in the CSI-RS resource set, and each CSI-RS resource has 8 antenna ports; the second sub-configuration can be: 4 CSI-RS resources in the CSI-RS resource set, and each CSI-RS resource has 4 antenna ports; the third sub-configuration can be: 4 CSI-RS resources in the CSI-RS resource set, and each CSI-RS resource has 2 antenna ports. That is, the ports corresponding to the CSI-RS resources in a sub-configuration are the full set or a non-empty subset of the ports that can be configured for the CSI-RS resource.

[0091] In some embodiments, the CSI reporting configuration information includes M sub-configuration information. In some energy-saving scenarios, such as energy-saving scenario 1, the CSI reporting configuration information is associated with one CSI-RS resource set in at least one CSI-RS resource set configured by the CSI-RS resource configuration information. Each of the M sub-configuration information in the CSI reporting configuration information is associated with N CSI-RS resources in one CSI-RS resource set in the at least one CSI-RS resource set. In other words, each of the M sub-configuration information corresponds to all CSI-RS resources in one CSI-RS resource set.

[0092] The mth sub-configuration information among the M sub-configuration information may include one port indication information (port-subsetIndicator), where 1≤m≤M. The port indication information indicates on which ports the terminal device performs channel measurement. The port indication information of each sub-configuration in the M sub-configurations may be the same or different. For example, the ports or number of ports of each sub-configuration may be the same or different.

[0093] The port indication information can be represented by a Q-bit bitmap. In the bitmap, "1" indicates that the port is enabled, and "0" indicates that the port is not enabled.

[0094] For example, for a CSI-RS resource set, the CSI-RS resource set is configured with 4 CSI-RS resources, and each CSI-RS resource can be configured with a maximum of 32 antenna ports. Taking the number of antenna ports (nrofports) as 8 and M = 3 as an example, three types of antenna ports can be configured for each CSI-RS resource, for example, 8 ports, 4 ports, and 2 ports. The port indication information can be represented by an 8-bit bitmap. For example, the first sub-configuration information can be an 8-bit bitmap with all 1s, for example, '11111111', which means that 8 ports are configured and enabled; the second sub-configuration information can be an 8-bit bitmap with 4 bits as 1 and the other bits as 0, for example, '10101010', which means that 8 ports are configured and 4 of them are enabled; the third sub-configuration information can be an 8-bit bitmap with 2 bits as 1 and the other bits as 0, for example, '10100000', which means that 8 ports are configured and 2 of them are enabled.

[0095] In some embodiments, the first antenna port includes [3000+p (0) ,…,3000+p (P-1) ], where P is the number of enabled ports indicated by the port-subsetIndicator in the sub-configuration information, 0≤p (j) ≤Q, 0≤j≤P-1, where Q is equal to the port number indication information (nrofports) in the CSI-RS resource configuration information.

[0096] For example, when the number of ports nrofports=8 and the port indication information port-subsetIndicator='10101010', P=4 and Q=8.

[0097] Figure 4 is a schematic diagram of the first antenna port according to an embodiment of the present application. As shown in Figure 4, when the number of ports nrofports = 8 and the port indication information port-subsetIndicator = '10101010', 8 antenna ports are configured on one CSI-RS resource. According to the above sub-configuration information, antenna ports indexed 0, 2, 4, and 6 among the 8 antenna ports are selected (enabled).

[0098] In some embodiments, in the first antenna port, p (j) The value of may be the index of the jth enabled port indicated by the port indication information (port-subsetIndicator). Thus, the first antenna port can be represented intuitively, which is convenient for terminal implementation.

[0099] For example, when the port indication information port-subsetIndicator = '10101010', P = 4, p (0) =0, p (1) =2, p (2) =4, p (3) = 6. The first antenna port includes [3000, 3002, 3004, 3006].

[0100] In some embodiments, in the first antenna port, p (j) The value of can be j. Thus, the first antenna port can be represented in a simple manner.

[0101] For example, when the port indication information port-subsetIndicator = '10101010', P = 4, p (0) =0, p (1) =1, p (2) =2, p (3) = 3. The first antenna port includes [3000, 3001, 3002, 3003].

[0102] In some embodiments, the first antenna port includes [3000+0, ..., 3000+P-1], where P is the number of enabled ports indicated by the port-subsetIndicator information of the sub-configuration information. Thus, existing parameters can be used to represent the first antenna port, which is easy to implement and has good compatibility.

[0103] In some embodiments, the CQI information is calculated based on at least a hypothetical physical downlink shared channel (PDSCH) signal, which is transmitted on the second antenna port [1000,…,1000+ν-1], and the PDSCH signal is associated with the relevant symbol on the first antenna port, where v is the number of PDSCH transmission layers.

[0104] In some embodiments, the correlation relationship between the PDSCH signal and the relevant symbols on the first antenna port of the m-th sub-configuration is as follows:

[0105] in, represents the signal vector of v layers of PDSCH signal,

[0106] Indicates antenna port [3000+p (0) ,…,3000+p (P-1) ] on the relevant symbols,

[0107] W m (i) represents the PMI information calculated based on the m-th sub-configuration information, 1≤m≤M.

[0108] In some embodiments, the correlation relationship between the PDSCH signal and the relevant symbols on the first antenna port of the m-th sub-configuration is as follows:

[0109] in, represents the signal vector of v layers of PDSCH signal,

[0110] represents the relevant symbols on the antenna port [3000+0,…,3000+P-1],

[0111] W m (i) represents the PMI information calculated based on the m-th sub-configuration information, 1≤m≤M.

[0112] In some embodiments, for the M sub-configuration information in the CSI reporting configuration information, CSI calculation and reporting can be performed for each sub-configuration information in the M sub-configuration information; alternatively, CSI calculation and reporting can be performed for part of the sub-configuration information in the M sub-configuration information. This application does not impose any specific restrictions on this.

[0113] FIG5 is a schematic diagram of an implementation of 302 of an embodiment of the present application. In some embodiments, as shown in FIG5 , in 302 , the calculation of CQI may include:

[0114] 501, determining a correlation between a PDSCH signal and a related symbol on a first antenna port of an m-th sub-configuration; and

[0115] 502. Calculate CQI according to the correlation relationship.

[0116] The following describes the CQI calculation method of the present application with reference to specific examples.

[0117] Example 1:

[0118] 1) Step 1: The terminal device receives CSI-RS resource configuration information for channel measurement, where the CSI-RS resource configuration information includes at least port number indication information 'nrofports' and one CSI-RS resource set, where the CSI-RS resource set includes N=4 CSI-RS resources;

[0119] 2) Step 2: The CSI reporting configuration information includes at least M=3 sub-configuration information, which can be used to configure M=3 sub-configuration CSI reporting information, where M=3 represents 8-port, 4-port, and 2-port sub-configuration information.

[0120] a) Step 2-1: The port-subsetIndicator configuration of the three sub-configuration information can be performed in the following manner:

[0121] i. Port indication of sub-configuration through the bitmap of Q bits,

[0122] 1. Q is equal to the port number indication information 'nrofports' in the CSI-RS resource configuration information.

[0123] 2. 8 ports can be indicated by an 8-bit bitmap, such as '11111111', that is, 8 ports are configured and enabled, where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, that is, the number of ports with a value of 1 in the bitmap, that is, P = 8

[0124] 3. 4 ports can be indicated by an 8-bit bitmap, such as '10101010', that is, 8 ports are configured and the ports indexed 0, 2, 4, and 6 of the 8 ports are enabled, where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, that is, the number of ports with a value of 1 in the bitmap, that is, P = 4

[0125] 4. 2 ports can be indicated by an 8-bit bitmap, such as '10100000', that is, 8 ports are configured and the ports indexed 0 and 2 among the 8 ports are enabled, where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, that is, the number of ports with a value of 1 in the bitmap, that is, P = 2

[0126] b) The parameter configuration under the codebook of each sub-configuration information can be performed in the following manner:

[0127] i. (N1m, N2m) represents the codebook parameters of the mth sub-configuration information, where N1m is the number of antenna ports in the first dimension (horizontal dimension) in one polarization direction, and N2m is the number of antenna ports in the second dimension (vertical dimension) in one polarization direction. For the mth sub-configuration, 2*N1m*N2m=Pm=P CSI-RS , that is, the number of CSI-RS ports of the mth sub-configuration is Pm(P CSI-RS )

[0128] 1. For sub-configuration 1: 2*N11*N21=8.

[0129] 2. For sub-configuration 2: 2*N11*N21=4.

[0130] 3. For sub-configuration 3: 2*N11*N21=2.

[0131] 3) Step 3: The four resources in the CSI-RS resource configuration information are all related to the M=3 sub-configuration information in the CSI reporting configuration information. The terminal device calculates the optimal CSI-RS resource for the CSI reporting selection of each sub-configuration.

[0132] 4) Step 4: The terminal device measures the channel state information under the three sub-configurations based on the four resources and the sub-configuration information of M=3, and reports all CSI information of the three sub-configurations.

[0133] For example, the user equipment reorders the enabled ports according to the port indication information (ie, bitmap), and uses the reordered ports as the first antenna ports (which may also be expressed as assumed antenna ports or assumed ports).

[0134] For example, when the bitmap is '10101010', the enabled ports are sorted to obtain the hypothetical antenna ports [3000, 3000+1, 3000+2, 3000+3]. The hypothetical ports [3000, 3000+1, 3000+2, 3000+3] correspond to the actual ports [3000, 3000+2, 3000+4, 3000+6] indicated in the bitmap.

[0135] a) Step 4-1 Method 1: The user calculates the PMI under each sub-configuration information based on the above port indication information:

[0136] i. The first antenna port includes [3000+0,…,3000+P-1]

[0137] For sub-configuration 1: An 8-port hypothetical CSI-RS transmission and codebook definition are performed using [3000, 3000+1, …3000+7]. This means that the terminal device can calculate the PMI based on the channel information of these 8 ports.

[0138] 2. For sub-configuration 2: A hypothetical CSI-RS transmission and codebook definition for four ports is performed using [3000, 3000+1, …3000+3]. This means that the terminal device can calculate the PMI based on the channel information for these four ports.

[0139] 3. For sub-configuration 3: A two-port hypothetical CSI-RS transmission and codebook definition are performed using [3000, 3000+1]. This means that the terminal device can calculate the PMI based on the channel information of these two ports.

[0140] b) Step 4-1 Method 2: The user calculates the PMI under each sub-configuration information based on the above port indication information:

[0141] i. The first antenna port includes [3000+p (0) ,…,3000+p (P-1) ],0≤p (j) ≤Q, 0≤j≤P-1.

[0142] ii.p (j) The value of is j.

[0143] 1. For sub-configuration 1: p (0) =0, p (1) =1….p (7)=7, i.e., [3000, 3000+1, ... 3000+7] is used to perform hypothetical CSIRS transmission on 8 ports and define the codebook. This means that the terminal device can calculate the PMI based on the channel information of these 8 ports.

[0144] 2. For sub-configuration 2: p (0) =0, p (1) =1….p (3) =3, i.e., [3000, 3000+1, ... 3000+3] is used to perform hypothetical CSI-RS transmission and codebook definition for four ports. This means that the terminal device can calculate the PMI based on the channel information of these four ports.

[0145] 3. For sub-configuration 3: p (0) =0, p (1) =1, indicating that a two-port hypothetical CSI-RS transmission and codebook definition are performed using [3000, 3000 + 1]. This means that the terminal device can calculate the PMI based on the channel information of these two ports. The specific method for calculating the PMI based on channel information can be found in related technologies and will not be further explained here.

[0146] c) Step 4-2: The PMI mentioned in Step 4-1 is the precoding vector index value in the codebook. For the m-th sub-configuration, the PMI is calculated based on the codebook of the corresponding Pm ports.

[0147] d) Step 4-3: Based on the following mapping relationship, the terminal device calculates the channel result obtained by channel estimation based on the CSI-RS weighted by the precoding (PMI information), calculates the first SINR (signal to interference and noise ratio) under the current CSI-RS related port (hypothetical port), and calculates the hypothetical SINR of the PDSCH through the resource offset difference (EPRE, energy per resource element) between the PDSCH and CSI-RS configured by the network device. The terminal device fits the modulation order and SINR curve based on the calculation result of the current hypothetical SINR, and calculates and reports the optimal CQI according to the CQI quantization definition in the standard.

[0148] i. For sub-configuration 1:

[0149] in, represents the signal vector of v layers of PDSCH, is the CSI-RS resource symbol transmitted at antenna port [3000,…,3000+8-1]. 1(i) is the PMI information calculated in Step 4-1 based on sub-configuration 1.

[0150] ii. For sub-configuration 2:

[0151] in, represents the signal vector of v layers of PDSCH, For transmitting CSI-RS resource symbols at antenna ports [3000, 3000+2-1, 3000+3-1, 3000+4-1] (i.e., assuming CSI-RS resource symbols at antenna ports [3000, 3000+2-1, 3000+3-1, 3000+4-1], the actual CSI-RS resource symbols are at antenna ports [3000, 3000+3-1, 3000+5-1, 3000+7-1]). 2 (i) is the PMI information calculated in Step 4-1 based on sub-configuration 2.

[0152] iii. For sub-configuration 3:

[0153] in, represents the signal vector of v layers of PDSCH, The CSI-RS resource symbols transmitted at antenna ports [3000, 3000+2-1] are assumed to be CSI-RS resource symbols at antenna ports [3000, 3000+2-1], but the CSI-RS resource symbols actually transmitted are at antenna ports [3000, 3000+3-1]. 3 (i) is the PMI information calculated in Step 4-1 based on sub-configuration 3.

[0154] Example 2:

[0155] 1) Step 1: The terminal device receives CSI-RS resource configuration information for channel measurement, where the CSI-RS resource configuration information includes at least port number indication information 'nrofports' and one CSI-RS resource set, where the CSI-RS resource set includes N=4 CSI-RS resources;

[0156] 2) Step 2: The CSI reporting configuration information includes at least M=3 sub-configuration information, which can be used to configure M=3 sub-configuration CSI reporting information, where M=3 represents 8-port, 4-port, and 2-port sub-configuration information.

[0157] a) Step 2-1: The port-subsetIndicator configuration of the three sub-configuration information can be performed in the following manner:

[0158] i. Port indication of sub-configuration through the bitmap of Q bits,

[0159] 1. Q is equal to the port number indication information 'nrofports' in the CSI-RS resource configuration information.

[0160] 2. 8 ports can be indicated by an 8-bit bitmap, such as '11111111', that is, 8 ports are configured and enabled, where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, that is, the number of ports with a value of 1 in the bitmap, that is, P = 8

[0161] 3. 4 ports can be indicated by an 8-bit bitmap, such as '10101010', that is, 8 ports are configured and the ports indexed 0, 2, 4, and 6 of the 8 ports are enabled, where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, that is, the number of ports with a value of 1 in the bitmap, that is, P = 4

[0162] 4. 2 ports can be indicated by an 8-bit bitmap, such as '10100000', that is, 8 ports are configured and the ports indexed 0 and 2 among the 8 ports are enabled, where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, that is, the number of ports with a value of 1 in the bitmap, that is, P = 2

[0163] b) The parameter configuration under the codebook of each sub-configuration information can be performed in the following manner:

[0164] i. (N1m, N2m) represents the codebook parameters of the mth sub-configuration information, where N1m is the number of antenna ports in the first dimension (horizontal dimension) in one polarization direction, and N2m is the number of antenna ports in the second dimension (vertical dimension) in one polarization direction. For the mth sub-configuration, 2*N1m*N2m=Pm=P CSI-RS , that is, the number of CSI-RS ports of the mth sub-configuration is Pm(PCSI-RS )

[0165] 1. For sub-configuration 1: 2*N11*N21=8.

[0166] 2. For sub-configuration 2: 2*N11*N21=4.

[0167] 3. For sub-configuration 3: 2*N11*N21=2.

[0168] 3) Step 3: The four resources in the CSI-RS resource configuration information are all related to the M=3 sub-configuration information in the CSI reporting configuration information. The terminal device calculates the optimal CSI-RS resource for the CSI reporting selection of each sub-configuration.

[0169] 4) Step 4: The terminal device measures the channel state information under the three sub-configurations based on the four resources and the sub-configuration information of M=3, and reports all CSI information of the three sub-configurations.

[0170] a) Step 4-1 Method 1: The user calculates the PMI under each sub-configuration information based on the above port indication information:

[0171] i. For sub-configuration 1: 8-port hypothetical CSIRS transmission and codebook definition are performed using [3000, 3000+1, ... 3000+7]. This means that the terminal device can calculate the PMI based on the channel information of these 8 ports.

[0172] ii. For subconfiguration 2: Port mapping is performed based on the indices of the CSI-RS ports with a value of '1' in the bitmap (i.e., enabled ports). For example, [3000, 3000+2, 3000+4, 3000+6] is used to define a hypothetical CSI-RS transmission for four ports and the codebook. This means that the terminal device can calculate the PMI based on the channel information for these four ports.

[0173] iii. For sub-configuration 3: Port mapping is performed based on the CSI-RS port index with a value of '1' in the bitmap (i.e., enabled ports). For example, [3000, 3000 + 2] is used to define a hypothetical CSI-RS transmission for two ports and the codebook. This means that the terminal device can calculate the PMI based on the channel information for these two ports.

[0174] b) Step 4-1 Method 2: The user calculates the PMI under each sub-configuration information based on the above port indication information:

[0175] i. The first antenna port includes [3000+p (0) ,…,3000+p (P-1)],0≤p (j) ≤Q, 0≤j≤P-1.

[0176] ii.p (j) The value of is the index of the jth enabled port indicated by the port indication information (port-subsetIndicator), specifically, the index of the port with a value of 1 in the bitmap

[0177] 1. For sub-configuration 1: p (0) =0, p (1) =1….p (7) =7, i.e., [3000, 3000+1, ... 3000+7] is used to perform hypothetical CSI-RS transmission and codebook definition for 8 ports. This means that the terminal device can calculate the PMI based on the channel information of these 8 ports.

[0178] 2. For sub-configuration 2: p (0) =0, p (1) =2p (2) =4p (3) =6, that is, [3000, 3000+2, 3000+4, 3000+6] is used to perform a hypothetical CSIRS transmission of 4 ports and define the codebook. That is, the terminal device side can calculate the PMI based on the channel information of these 4 ports.

[0179] 3. For sub-configuration 3: p (0) =0, p (1) =2, that is, [3000, 3000 + 2] is used to perform a two-port hypothetical CSIRS transmission and define the codebook. That is, the terminal device can calculate the PMI based on the channel information of the two ports.

[0180] c) Step 4-2: The PMI mentioned in Step 4-1 is the precoding vector index value in the codebook. For the m-th sub-configuration, the PMI is calculated based on the codebook of the corresponding Pm ports.

[0181] d) Step 4-3: Based on the following mapping relationship, the terminal device calculates the channel result obtained by channel estimation based on the CSI-RS weighted by the precoding (PMI information), calculates the first SINR (signal to interference and noise ratio) under the current CSI-RS related port (hypothetical port), and calculates the hypothetical SINR of the PDSCH through the resource offset difference (EPRE, energy per resource element) between the PDSCH and CSI-RS configured by the network device. The terminal device fits the modulation order and SINR curve based on the calculation result of the current hypothetical SINR, and calculates and reports the optimal CQI according to the CQI quantization definition in the standard.

[0182] i. For sub-configuration 1:

[0183] in, represents the signal vector of v layers of PDSCH, is the CSI-RS resource symbol transmitted at antenna port [3000,…,3000+8-1]. 1 (i) is the PMI information calculated in Step 4-1 based on sub-configuration 1.

[0184] ii. For sub-configuration 2:

[0185] in, represents the signal vector of v layers of PDSCH, The CSI-RS resource symbols transmitted at antenna ports [3000, 3000+2, 3000+4, 3000+6] (ie, the CSI-RS resource symbols actually at antenna ports [3000, 3000+2, 3000+4, 3000+6]). 2 (i) is the PMI information calculated in Step 4-1 based on sub-configuration 2.

[0186] iii. For sub-configuration 3:

[0187] in, represents the signal vector of v layers of PDSCH, is the CSI-RS resource symbol transmitted at antenna port [3000, 3000+2] (ie, the CSI-RS resource symbol actually at antenna port [3000, 3000+2]). 3 (i) is the PMI information calculated in Step 4-1 based on sub-configuration 3.

[0188] In some embodiments, in 402, CSI can be calculated according to a determined mapping relationship, and the CSI may include PMI, CQI, etc. The specific method of calculating CSI according to the mapping relationship is as described above. For example, the UE calculates the first SINR (signal to interference and noise ratio) under the current CSI-RS related port (hypothetical port) by weighting the channel result H obtained by precoding W (PMI information) and CSI-RS, and calculates the hypothetical SINR of PDSCH by the resource offset difference (EPRE, energy per resource element) between PDSCH and CSI-RS configured by the network device. The terminal device fits the modulation order and SINR curve through the calculation result of the current hypothetical SINR, and calculates and reports the optimal CQI through the CQI quantization definition in the standard. The present application is not limited to this, and the specific method of calculating CSI according to the mapping relationship can also refer to the relevant technology.

[0189] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0190] It can be seen from the above embodiment that CSI is calculated and reported based on the relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information of the CSI reporting configuration information. In this way, CSI can be accurately obtained, thereby improving data transmission performance and improving single-user and network overall throughput.

[0191] Embodiments of the second aspect

[0192] The present embodiment provides a device for calculating channel state information. The device may be, for example, a terminal device, or may be one or more components or assemblies configured in the terminal device. The same contents as those in the embodiment of the first aspect are not repeated here.

[0193] FIG6 is a schematic diagram of an apparatus for calculating channel state information according to an embodiment of the present application. As shown in FIG6 , the apparatus 600 for calculating channel state information includes: a receiving unit 601 and a processing unit 602 .

[0194] The receiving unit 601 receives at least channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1;

[0195] The processing unit 602 calculates and reports CSI based on at least relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information.

[0196] In some embodiments, the receiving unit further receives CSI-RS resource configuration information, wherein the CSI-RS resource configuration information at least includes port number indication information (nrofports).

[0197] In some embodiments, the CSI information includes at least:

[0198] CQI (channel quality information) information, and / or

[0199] PMI (Precoder matric index) information.

[0200] In some embodiments, the first antenna port includes [3000+p (0) ,…,3000+p (P-1) ], where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, 0≤p (j) ≤Q, 0≤j≤P-1, where Q is equal to the port number indication information (nrofports) in the CSI-RS resource configuration information.

[0201] In some embodiments, p (j) The value of is the index of the jth enabled port indicated by the port indication information (port-subsetIndicator).

[0202] In some embodiments, p (j) The value of is j.

[0203] In some embodiments, the first antenna ports include [3000+0, ..., 3000+P-1], where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information.

[0204] In some embodiments, the calculation of the CQI information is based at least on a hypothetical physical downlink shared channel (PDSCH) signal, the PDSCH signal being transmitted on antenna ports [1000,…,1000+ν-1], the PDSCH signal being associated with relevant symbols on the first antenna port, where v is the number of PDSCH transmission layers.

[0205] In some embodiments, the correlation relationship between the PDSCH signal and the relevant symbols on the first antenna port of the m-th sub-configuration is

[0206] in, represents the signal vector of v layers of the PDSCH signal,

[0207] Indicates antenna port [3000+p (0) ,…,3000+p (P-1) ] on the relevant symbols,

[0208] W m (i) represents the PMI information calculated based on the m-th sub-configuration information, 1≤m≤M.

[0209] In some embodiments, the correlation relationship between the PDSCH signal and the relevant symbols on the first antenna port of the m-th sub-configuration is

[0210] in, represents the signal vector of v layers of the PDSCH signal,

[0211] represents the relevant symbols on the antenna port [3000+0,…,3000+P-1],

[0212] W m (i) represents the PMI information calculated based on the m-th sub-configuration information, 1≤m≤M.

[0213] In some embodiments, the mth sub-configuration information among the M sub-configuration information includes one port indication information (port-subsetIndicator), 1≤m≤M.

[0214] In some embodiments, the port indication information is a bitmap having Q bits, where Q is equal to the port number indication information (nrofports) in the CSI-RS resource configuration information.

[0215] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0216] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The apparatus 600 for calculating channel state information may also include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0217] In addition, for the sake of simplicity, FIG6 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0218] It can be seen from the above embodiment that CSI is calculated and reported based on the relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information of the CSI reporting configuration information. In this way, CSI can be accurately obtained, thereby improving data transmission performance and improving single-user and network overall throughput.

[0219] Embodiments of the third aspect

[0220] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents that are the same as those in the embodiments of the first to second aspects will not be repeated.

[0221] In some embodiments, the communication system 100 may include at least: a network device and a terminal device, wherein the terminal device at least receives channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information includes M sub-configuration information, M is an integer greater than or equal to 1; and the CSI is calculated and reported based on the relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information.

[0222] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0223] Figure 7 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 7, network device 700 may include a processor 710 (e.g., a central processing unit (CPU)) and a memory 720; memory 720 is coupled to processor 710. Memory 720 may store various data and may also store an information processing program 730, which is executed under the control of processor 710.

[0224] For example, the processor 710 may be configured to execute a program to implement the operation of the network device in the method according to the embodiment of the first aspect. For example, the processor 710 may be configured to perform the following control: at least sending channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1; and receiving a CSI report, where the CSI is calculated based on at least relevant symbols on the first antenna port related to at least one sub-configuration information in the M sub-configuration information.

[0225] In addition, as shown in FIG7 , network device 700 may further include: a transceiver 740 and an antenna 750, etc.; wherein, the functions of the above components are similar to those in the related art and are not further described here. It is worth noting that network device 700 does not necessarily include all the components shown in FIG7 ; in addition, network device 700 may also include components not shown in FIG7 , and reference may be made to the related art for details.

[0226] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0227] Figure 8 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 8 , terminal device 800 may include a processor 810 and a memory 820. Memory 820 stores data and programs and is coupled to processor 810. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0228] For example, the processor 810 may be configured to execute a program to implement the method according to the embodiment of the first aspect. For example, the processor 810 may be configured to perform the following control: at least sending channel state information (CSI) reporting configuration information, where the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1; and receiving a CSI report, where the CSI is calculated based on at least relevant symbols on the first antenna port related to at least one sub-configuration information in the M sub-configuration information.

[0229] As shown in Figure 8 , the terminal device 800 may further include: a communication module 830, an input unit 840, a display 850, and a power supply 860. The functions of these components are similar to those in the related art and are not described in detail here. It is worth noting that the terminal device 800 does not necessarily include all of the components shown in Figure 8 , and the above components are not essential. Furthermore, the terminal device 800 may also include components not shown in Figure 8 , for which reference may be made to the related art.

[0230] An embodiment of the present application further provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the method described in the embodiment of the first aspect.

[0231] An embodiment of the present application further provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the method described in the embodiment of the first aspect.

[0232] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0233] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0234] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0235] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings 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 device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0236] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0237] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0238] Note 1. A method for calculating channel state information, applied to a terminal device, comprising:

[0239] receiving at least channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1; and

[0240] The CSI is calculated and reported based on relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information.

[0241] Note 2. The apparatus according to Note 1, wherein the CSI information includes at least:

[0242] CQI (channel quality information) information, and / or

[0243] PMI (Precoder matric index) information.

[0244] Note 3. The method according to Note 2, wherein the calculation of the CQI information is based at least on a hypothetical physical downlink shared channel (PDSCH) signal, the PDSCH signal is transmitted on antenna ports [1000,…,1000+ν-1], and the PDSCH signal is associated with the relevant symbols on the first antenna port, wherein v is the number of PDSCH transmission layers.

[0245] Note 4. The method according to Note 3, wherein the correlation between the PDSCH signal and the relevant symbol on the first antenna port of the m-th sub-configuration is

[0246] in, represents the signal vector of v layers of the PDSCH signal,

[0247] Indicates antenna port [3000+p (0) ,…,3000+p (P-1) ] on the relevant symbols,

[0248] Wm (i) represents the PMI information calculated based on the m-th sub-configuration information, 1≤m≤M.

[0249] Note 5. The method according to Note 3, wherein the correlation between the PDSCH signal and the relevant symbol on the first antenna port of the m-th sub-configuration is

[0250] in, represents the signal vector of v layers of the PDSCH signal,

[0251] represents the relevant symbols on the antenna port [3000+0,…,3000+P-1],

[0252] W m (i) represents the PMI information calculated based on the m-th sub-configuration information, 1≤m≤M.

[0253] Note 6. The method according to Note 1, wherein:

[0254] The mth sub-configuration information among the M sub-configuration information includes one port indication information (port-subsetIndicator), where 1≤m≤M.

[0255] Note 7. The method according to Note 6, wherein:

[0256] The port indication information is a bitmap having Q bits, wherein Q is equal to the port number indication information (nrofports) in the CSI-RS resource configuration information.

Claims

1. A device for calculating channel state information, configured in a terminal device, the device comprising: A receiving unit, which receives at least channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1; and A processing unit calculates and reports CSI based on at least relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information.

2. The device according to claim 1, wherein: The receiving unit further receives CSI-RS resource configuration information, wherein the CSI-RS resource configuration information at least includes port quantity indication information (nrofports).

3. The device according to claim 1, wherein: The CSI information includes at least: CQI (channel quality information) information, and / or PMI (Precoder matric index) information.

4. The device according to claim 2, wherein: The first antenna port includes [3000+p (0) ,…,3000+p (P-1) ], where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, 0≤p (j) ≤Q, 0≤j≤P-1, where Q is equal to the port quantity indication information (nrofports) in the CSI-RS resource configuration information.

5. The device according to claim 4, wherein: p (j) The value of is the index of the jth enabled port indicated by the port indication information (port-subsetIndicator).

6. The device according to claim 4, wherein: p (j) The value of is j.

7. The device according to claim 1, wherein: The first antenna ports include [3000+0, ..., 3000+P-1], where P is the number of enabled ports indicated by the port indication information (port-subsetIndicator) of the sub-configuration information.

8. The device according to claim 3, wherein: The calculation of the CQI information is based at least on an assumed physical downlink shared channel (PDSCH) signal, the PDSCH signal is transmitted on antenna port [1000, ..., 1000 + v-1], and the PDSCH signal is associated with the relevant symbol on the first antenna port, where v is the number of PDSCH transmission layers.

9. The device according to claim 8, wherein: The correlation relationship between the PDSCH signal and the relevant symbol on the first antenna port of the mth sub-configuration is: in, represents the signal vector of v layers of the PDSCH signal, Indicates antenna port [3000+p (0) ,…,3000+p (P-1) ] on the relevant symbols, W m (i) represents the PMI information calculated based on the m-th sub-configuration information, 1≤m≤M.

10. The device according to claim 8, wherein: The correlation relationship between the PDSCH signal and the relevant symbol on the first antenna port of the mth sub-configuration is: in, represents the signal vector of v layers of the PDSCH signal, represents the relevant symbols on the antenna port [3000+0,…,3000+P-1], W m (i) represents the PMI information calculated based on the m-th sub-configuration information, 1≤m≤M.

11. The device according to claim 2, wherein: The m-th sub-configuration information among the M sub-configuration information includes one port indication information (port-subsetIndicator), 1≤m≤M.

12. The device according to claim 11, wherein The port indication information is a bitmap having Q bits, wherein Q is equal to the port quantity indication information (nrofports) in the CSI-RS resource configuration information.

13. A method for calculating channel state information, applied to a terminal device, the method comprising: At least receiving channel state information (CSI) reporting configuration information, wherein the CSI reporting configuration information includes M sub-configuration information, where M is an integer greater than or equal to 1; and The CSI is calculated and reported based on relevant symbols on the first antenna port related to at least one sub-configuration information among the M sub-configuration information.

14. The method according to claim 13, wherein: The method further comprises: CSI-RS resource configuration information is received, wherein the CSI-RS resource configuration information at least includes port quantity indication information (nrofports).

15. The method according to claim 13, wherein: The CSI information includes at least: CQI (channel quality information) information, and / or PMI (Precoder matric index) information.

16. The method according to claim 14, wherein: The first antenna port includes [3000+p (0) ,…,3000+p (P-1) ], where P is the number of enabled ports indicated by the port-subsetIndicator of the sub-configuration information, 0≤p (j) ≤Q, 0≤j≤P-1, where Q is equal to the port quantity indication information (nrofports) in the CSI-RS resource configuration information.

17. The method according to claim 16, wherein: p (j) The value of is the index of the jth enabled port indicated by the port indication information (port-subsetIndicator).

18. The method according to claim 16, wherein: p (j) The value of is j.

19. The method according to claim 13, wherein: The first antenna ports include [3000+0, ..., 3000+P-1], where P is the number of enabled ports indicated by the port indication information (port-subsetIndicator) of the sub-configuration information.

20. A communication system comprising a network device and a terminal device, wherein the terminal device has the apparatus for calculating channel state information according to claim 1.

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