CSI (Channel State Information) measurement method, terminal and network side equipment

Abstract

The invention discloses a CSI (Channel State Information) measurement method, a terminal and network side equipment, and belongs to the technical field of communication, and the CSI measurement method in the embodiment of the invention comprises the following steps: the terminal receives a first port set; and the terminal performs channel state information (CSI) measurement according to a first resource, wherein the first resource comprises at least part of resources corresponding to at least one first port in the first port set.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a CSI measurement method, a terminal, and network-side equipment. Background Technology

[0002] In communication systems, when a terminal communicates with network-side equipment, it typically performs Channel State Information (CSI) measurements and reports the CSI measurement results to the network-side equipment so that the network-side equipment can perform resource scheduling and other functions based on the CSI measurement results. In related technologies, terminals can perform CSI measurements by measuring the Channel State Information-Reference Symbol (CSI-RS). However, in practical applications, using CSI-RS for CSI measurements consumes significant resources, especially for periodic CSI-RS resources, resulting in a substantial overall resource overhead. Summary of the Invention

[0003] This application provides a CSI measurement method, terminal, and network-side device, which can solve the problem of high resource consumption when using CSI-RS for CSI measurement in related technologies.

[0004] Firstly, a CSI measurement method is provided, executed by a terminal, the method comprising:

[0005] The terminal receives the first set of ports;

[0006] The terminal performs Channel State Information (CSI) measurement based on a first resource, wherein the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0007] Secondly, a CSI measurement method is provided, performed by a network-side device, the method comprising:

[0008] The network-side device sends the first port set;

[0009] The first resource is used by the terminal to perform CSI measurements, and the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0010] Thirdly, a CSI measurement device is provided, comprising:

[0011] The receiving module is used to receive the first set of ports;

[0012] The processing module is configured to perform channel state information (CSI) measurement based on a first resource, wherein the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0013] Fourthly, a CSI measurement device is provided, comprising:

[0014] The sending module is used to send the first set of ports;

[0015] The first resource is used by the terminal to perform CSI measurements, and the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0016] Fifthly, a CSI measurement apparatus is provided, the apparatus being configured to perform the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0017] In a sixth aspect, a terminal is provided, the terminal including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0018] In a seventh aspect, a terminal is provided, including a processor and a communication interface, wherein the communication interface is used to receive a first port set, and the processor is used to perform channel state information (CSI) measurement based on a first resource, wherein the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0019] Eighthly, a network-side device is provided, the network-side device including a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method as described in the first aspect.

[0020] In a ninth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is used to transmit a first port set; wherein a first resource is used by a terminal to perform CSI measurements, and the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0021] In a tenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect.

[0022] Eleventhly, a wireless communication system is provided, comprising: a terminal and a network-side device, wherein the terminal can be used to perform the steps of the method as described in the first aspect, and the network-side device can be used to perform the steps of the method as described in the second aspect.

[0023] In a twelfth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being configured to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0024] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method as described in the first aspect, or to implement the steps of the method as described in the second aspect.

[0025] In this embodiment, the terminal can receive a first port set. When measuring CSI, it can perform CSI measurement based on a first resource, whereby the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set. Thus, since the terminal can utilize at least a portion of the resources of at least one first port for CSI measurement, the resource overhead of measuring CSI information can be reduced, thereby improving the overall transmission capacity of the system. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a wireless communication system according to an embodiment of this application;

[0027] Figure 2 This is a schematic flowchart of a CSI measurement method according to an embodiment of this application;

[0028] Figure 3 This is a schematic flowchart of a CSI measurement method according to an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of a first resource for CSI measurement according to an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of a first resource for CSI measurement according to an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of a first resource for CSI measurement according to an embodiment of this application;

[0032] Figure 7 This is a schematic diagram of a first resource for CSI measurement according to an embodiment of this application;

[0033] Figure 8This is a schematic diagram of a first resource for CSI measurement according to an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of a first resource for CSI measurement according to an embodiment of this application;

[0035] Figure 10 This is a bandwidth diagram of a first resource for CSI measurement according to an embodiment of this application;

[0036] Figure 11 This is a bandwidth diagram of a first resource for CSI measurement according to an embodiment of this application;

[0037] Figure 12 This is a schematic diagram of the structure of a CSI measuring device according to an embodiment of this application;

[0038] Figure 13 This is a schematic diagram of the structure of a CSI measuring device according to an embodiment of this application;

[0039] Figure 14 This is a schematic diagram of the structure of a communication device according to an embodiment of this application;

[0040] Figure 15 This is a schematic diagram of the terminal structure according to an embodiment of this application;

[0041] Figure 16 This is a schematic diagram of the structure of a network-side device according to an embodiment of this application. Detailed Implementation

[0042] In related technologies, terminals primarily measure CSI using CSI-RS. However, using CSI-RS to measure CSI consumes significant resources, especially for periodic CSI-RS, resulting in a substantial overall resource consumption.

[0043] To optimize the resource overhead of CSI-RS, CSI measurement can be implemented using other resources, such as a Demodulation Reference Signal (DMRS). This allows the DMRS to perform both physical channel demodulation and CSI measurement functions. However, current protocols do not support CSI measurement and reporting based on DMRS, and the design of the DMRS has different requirements for demodulation and CSI measurement. Alternatively, a CSI-RS pattern compatible with DMRS can be used for CSI-RS measurement. For example, a specially designed aperiodic CSI-RS can be frequency-division multiplexed with DMRS to achieve a similar effect to DMRS-based CSI measurement while reducing the reference signal overhead. Therefore, this application proposes a CSI measurement method that allows the terminal to utilize at least a portion of the resources of a specific port (such as a DMRS port) for CSI measurement when measuring CSI, thereby reducing the resource overhead of CSI information measurement and improving the overall transmission capacity of the system.

[0044] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0045] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0046] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0047] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) radio systems. th Generation 6G communication system.

[0048] Figure 1This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipboard equipment, pedestrian user equipment (PUE), smart home devices (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), game consoles, personal computers (PCs), ATMs, or self-service machines, etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in this application embodiment. Network-side equipment 12 may include access network equipment or core network equipment, wherein access network equipment may also be referred to as Radio Access Network (RAN) equipment, radio access network function, or radio access network unit. Access network equipment may include base stations, Wireless Local Area Network (WLAN) access points (AS), or Wireless Fidelity (WiFi) nodes, etc.The term "base station" can be referred to as Node B (NB), Evolved Node B (eNB), Next Generation Node B (gNB), New Radio Node B (NR Node B), Access Point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B, Transmit / Receive Point (TRP), or any other suitable term in the relevant field, as long as the same technical effect is achieved. The term "base station" is not limited to any specific technical terminology. It should be noted that this application embodiment only uses a base station in an NR system as an example for description and does not limit the specific type of base station.

[0049] Core network equipment, also known as core network nodes, core network functions, or core network elements, includes, but is not limited to, at least one of the following: Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (or L-NEF), and Binding Support Function. Support Functions (BSF), Application Functions (AF), Location Management Functions (LMF), Gateway Mobile Location Centres (GMLC), and Network Data Analytics Functions (NWDAF), etc. It should be noted that this application embodiment only uses core network equipment in the NR system as an example and does not limit the specific type of core network equipment. If the name of the core network equipment mentioned in this application embodiment changes in subsequent protocol versions (e.g., 6G), it will still be within the scope of protection of this application.

[0050] Optionally, the core network equipment can be implemented by one or more functional modules in a single device, or by multiple devices working together; this application does not specifically limit this. It is understood that the aforementioned functional modules can be network elements in hardware devices, software functional modules running on dedicated hardware, or virtualized functional modules instantiated on a platform (e.g., a cloud platform).

[0051] The CSI measurement method, terminal, and network-side equipment provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0052] like Figure 2 As shown, this application embodiment provides a CSI measurement method 200, which can be executed by a terminal. In other words, the CSI measurement method can be executed by software or hardware installed on the terminal. The CSI measurement method includes the following steps.

[0053] S202: The terminal receives the first set of ports.

[0054] S204: The terminal performs Channel State Information (CSI) measurement based on the first resource, wherein the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0055] The first port set can be sent to the terminal by the network-side device. The first port set includes at least one first port, which can be at least one DMRS port or a port of other reference signals. After receiving the first port set, the terminal can use the first port set to perform CSI measurements, that is, perform CSI measurements based on at least a portion of the resources corresponding to at least one first port in the first port set.

[0056] In this way, since the terminal can use at least a portion of the resources of at least one first port to measure CSI, the resource overhead of measuring CSI information can be reduced, and the overall transmission capacity of the system can be improved.

[0057] In some implementations, the first port in the first port set may include at least one of the following four cases:

[0058] Case 1: All first ports in the first port set are used for demodulation and CSI measurements.

[0059] For example, all N first ports in the first port set (N being an integer greater than 1) are used for both demodulation and CSI measurement (it should be noted that "all N first ports are used for CSI measurement" means that these N first ports can be used for CSI measurement, but in actual applications, the terminal may not use all of these N first ports for CSI measurement). When performing CSI measurement, the terminal can perform CSI measurement based on at least a portion of the resources corresponding to these N first ports; that is, the terminal can perform CSI measurement based on the total resources corresponding to these N first ports, or based on a portion of the total resources corresponding to these N first ports.

[0060] The second scenario: All first ports in the first port set are used for demodulation, and some first ports are used for CSI measurements.

[0061] For example, all N first ports in the first port set are used for demodulation, and X first ports (X is an integer greater than 0 and less than N) can also be used for CSI measurement in addition to demodulation. (It should be noted that although all X first ports can be used for CSI measurement, in actual applications, the terminal may not use all of these X first ports for CSI measurement.) When performing CSI measurement, the terminal can perform CSI measurement based on at least a portion of the resources corresponding to these X first ports; that is, the terminal can perform CSI measurement based on the overall resources corresponding to these X first ports, or based on a portion of the overall resources corresponding to these X first ports.

[0062] The third scenario: Some of the first ports in the first port set are used for demodulation, while all first ports are used for CSI measurements.

[0063] For example, Y out of all N first ports in the first port set (where Y is an integer greater than 0 and less than N) are used for demodulation, and all N first ports are used for CSI measurement (it should be noted that although all N first ports can be used for CSI measurement, in practical applications, the terminal may not use all of these N first ports for CSI measurement). When performing CSI measurement, the terminal can perform CSI measurement based on at least a portion of the resources corresponding to these N first ports; that is, the terminal can perform CSI measurement based on the overall resources corresponding to these N first ports, or based on a portion of the overall resources corresponding to these N first ports. Among the N first ports, X first ports (X = NY) are used only for CSI measurement. These X first ports used only for CSI measurement can be understood as X first ports that are not used for demodulation, for example, X DMRS ports that are not used for demodulation.

[0064] The fourth scenario: All first ports in the first port set are used solely for CSI measurements.

[0065] For example, all N first ports in the first port set are used solely for CSI measurements (it should be noted that although all N first ports can be used for CSI measurements, in practice, the terminal may not use all of these N first ports for CSI measurements). When performing CSI measurements, the terminal can perform CSI measurements based on at least a portion of the resources corresponding to these N first ports; that is, the terminal can perform CSI measurements based on the overall resources corresponding to these N first ports, or based on a portion of the overall resources corresponding to these N first ports. The N first ports used solely for CSI measurements can be understood as the N first ports that do not require demodulation, for example, the N DMRS ports that are not used for demodulation.

[0066] It should be noted that in the first, second, and third scenarios mentioned above, demodulation can be performed on the downlink data channel or the downlink physical shared channel, such as demodulating the Physical Downlink Shared Channel (PDSCH). When the first port is used for PDSCH demodulation, this demodulation can be implicitly understood as a correlation or mapping relationship between the data stream of the first port and the PDSCH, such as a one-to-one correlation or mapping.

[0067] In some implementations, for at least one of the first, second, and third scenarios described above, the first resource may satisfy at least one of the following (a1) to (a4):

[0068] (a1) The first resource includes at least a portion of the symbols occupied by at least one first port.

[0069] The symbols occupied by at least one first port may include a prefix symbol and additional symbols. For example, a first resource may include only the prefix symbol occupied by at least one first port, or only at least some of the additional symbols occupied by at least one first port, or include at least the prefix symbol occupied by at least one first port and at least some of the additional symbols. Optionally, in some embodiments, the first resource includes at least some of the symbols occupied by at least one first port, which may include at least one of the following:

[0070] On a first port, the symbol used for CSI measurement is at least one additional symbol for that first port;

[0071] On a first port, the symbol used for CSI measurements is the prefix symbol of that first port.

[0072] A first port here can be each of at least one first port, or it can be each of a subset of at least one first port; no specific limitation is made here. For a first port, the symbol used to measure CSI on that first port can be at least one additional symbol of that first port, or a prefix symbol of that first port, or a prefix symbol of that first port and at least one additional symbol.

[0073] For example, taking the first port as the DMRS port, on a DMRS port, the symbol used to measure CSI can be the DMRS prefix symbol, or the DMRS additional symbol, or the DMRS prefix symbol and some additional symbols. When measuring CSI, the terminal can perform CSI measurement based on the DMRS additional symbol, or based on the DMRS prefix symbol, or based on the DMRS prefix symbol and some additional symbols.

[0074] (a2) The first resource includes at least a portion of the frequency domain resources occupied by at least one first port.

[0075] Optionally, in some embodiments, the first resource includes at least a portion of the frequency domain resources occupied by at least one first port, and may include at least one of the following (a21) to (a23):

[0076] (a21) On a first port, the frequency domain resources used for CSI measurements are a subset of the frequency domain resources used for demodulation.

[0077] For example, within a resource block (RB), the resource element (RE) used for CSI measurements is a subset of all REs occupied by that first port.

[0078] For example, within a Code Division Multiplexing (CDM) group, the RE used for CSI measurements is a subset of the REs occupied by the first port within that CDM group.

[0079] For example, CSI measurements are performed on certain subbands of the first port, but not on other subbands.

[0080] (a22) On a first port, the frequency domain density used for CSI measurement is 1 / M of the frequency domain density used for demodulation, where M is a positive integer.

[0081] For example, at the RB granularity, the frequency domain density used for CSI measurement is half that used for demodulation, meaning that the frequency domain resources used for CSI measurement occupy half of the RB resources with an interval of one RB.

[0082] For example, within a single RB, at the RE granularity, the frequency domain density used for CSI measurements is 1 / 6 of the frequency domain density used for demodulation. Taking a pattern similar to Type 1 DMRS as an example, a certain port occupies 6 REs, and the RE used for CSI measurements is one of those 6 REs. The specific RE can be determined by the RE offset; of course, this RE offset can also be used to determine multiple REs, but this will not be elaborated upon here.

[0083] (a23) On a first port, the frequency domain resources used for demodulation are a subset of the frequency domain resources used for CSI measurements.

[0084] For example, the bandwidth used for CSI measurement is greater than or equal to the bandwidth used for demodulation. Specifically, if an extra symbol in DMRS is used for CSI measurement and a preceding symbol is used for demodulation, the bandwidth on the extra symbol can be greater than the bandwidth on the preceding symbol. If the preceding symbol is used for CSI measurement and the extra symbol is used for demodulation, the bandwidth on the preceding symbol can be greater than the bandwidth on the extra symbol.

[0085] It should be noted that one of the first ports in (a21) to (a23) above can be each of the at least one first port, or it can be each of the ports in a subset of the at least one first port, without any specific limitation here.

[0086] (a3) The first resource includes at least a portion of the transmission opportunities occupied by at least one first port.

[0087] For example, taking the first port as a DMRS port, the first resource may include at least a portion of the transmission slots of at least one DMRS port. When measuring CSI, the terminal can perform CSI measurement on a portion of the transmission slots of at least one DMRS port. For example, the DMRS port transmits on N slots, but the slots used for CSI measurement are only some specific slots, such as some specific slots agreed upon by the protocol by default.

[0088] (a4) In the first resource, at least a portion of the first ports in at least one of the first ports correspond to different second resources, and the second resource is a resource used for CSI measurement.

[0089] The first resource describes the overall time-frequency resources for CSI measurements corresponding to at least one first port, and the second resource describes the time-frequency resources for CSI measurements corresponding to a specific first port. In at least one first port, the second resources are different for different first ports, or, in some ports of at least one first port, the second resources are different for different first ports. For example, at least one first port includes first port #1 and second port #2, and the frequency domain resources for CSI measurements performed on first port #1 are different from those for CSI measurements performed on first port #2. Another example is that the symbol for CSI measurements performed on first port #1 is different from the symbol for CSI measurements performed on first port #2.

[0090] For the third scenario described above (where some first ports in the first port set are used for demodulation, and all first ports are used for CSI measurements), the first port set includes X first ports used only for CSI measurements and Y first ports used for demodulation (where X and Y are both positive integers, and X = NY, and N is the number of ports in the first port set). In this case, in some implementations, the first resource can satisfy at least one of the following (b1) to (b5):

[0091] (b1) In the first resource, the symbols occupied by X first ports are a subset of the symbols occupied by Y first ports.

[0092] For example, the first port used for demodulation occupies 2 symbols (such as one preamplifier symbol and one extra symbol), while the first port used for CSI measurement occupies 1 symbol (such as the extra symbol).

[0093] (b2) In the first resource, the frequency domain resources occupied by X first ports are a subset of the frequency domain resources occupied by Y first ports. In this case, the two can be multiplexed using CDM.

[0094] For example, taking a pattern similar to Type 2 DMRS as an example, in a CDM group, the first port used for demodulation occupies 4 REs, while the first port used for CSI measurement occupies 2 of them.

[0095] For example, the first port used for demodulation occupies 20 RBs, while the first port used for CSI measurement occupies 10 of those RBs, meaning the frequency domain density is 1 / 2.

[0096] (b3) In the first resource, X first ports and Y first ports occupy different frequency domain resources. In this case, they can be multiplexed based on Frequency Division Multiplexing (FDM).

[0097] For example, the first port used for demodulation and the first port used for CSI measurement belong to different CDM groups.

[0098] (b4) In the first resource, X first ports and Y first ports occupy different symbols.

[0099] For example, the first port used for demodulation occupies a prefix symbol, the first port used for CSI measurement occupies an additional symbol, or the first port used for demodulation occupies an additional symbol, and the first port used for CSI measurement occupies a prefix symbol.

[0100] (b5) In the first resource, the bandwidth of X first ports is greater than or equal to the bandwidth of Y first ports.

[0101] For the fourth scenario described above (where all first ports in the first port set are used solely for CSI measurements), some implementations may include the following steps:

[0102] The terminal receives a second set of ports, which includes a second port for demodulation. The first port in the first set of ports is multiplexed with the second port in the second set of ports.

[0103] The second port set can be sent to the terminal by the network-side device. The second port set may include at least one second port, which may be used only for demodulation (e.g., demodulation of PDSCH). If all first ports in the first port set are used for CSI measurements, the first ports in the first port set may be multiplexed with the second ports in the second port set.

[0104] In some implementations, the first port in the first port set and the second port in the second port set are multiplexed to satisfy at least one of the following (c1) to (c7):

[0105] (c1) The symbols occupied by the first port are a subset of the symbols occupied by the second port.

[0106] For example, the first port is only multiplexed with the second port on the extra symbol of the second port.

[0107] (c2) The transmission time occupied by the first port is a subset of the transmission time occupied by the second port.

[0108] For example, the first port is only multiplexed with the second port during some transmission times.

[0109] (c3) The frequency domain resources occupied by the first port are a subset of the frequency domain resources occupied by the second port;

[0110] For example, the first port can be multiplexed with the second port within the same CDM group.

[0111] For example, CSI measurements are performed on certain subbands of the first port, but not on other subbands. Meanwhile, all subbands or the entire bandwidth occupied by the second port are used for demodulation.

[0112] (c4) Frequency division multiplexing is performed between the first port and the second port.

[0113] For example, the first port can be multiplexed with the second port in a CDM group that is not occupied by the second port (for example, if the second port occupies CDM group 1, then the first port occupies CDM group 2).

[0114] (c5) In different transmission times, different first ports and second ports in the first port set are multiplexed.

[0115] For example, at different transmission times, different first ports and second ports are multiplexed, and finally, the CSI measurements performed by the first ports at multiple transmission times form a complete CSI information.

[0116] (c6) Within the same RB, the frequency domain resources occupied by the first port are less than or equal to the frequency domain resources occupied by the second port.

[0117] (c7) The bandwidth of the first port is greater than or equal to the bandwidth of the second port.

[0118] In some implementations, the first port set may include first ports used only for CSI measurements, such as the X first ports used only for CSI measurements in the third case described above, or all first ports used only for CSI measurements in the fourth case described above. For a first port in the first port set used only for CSI measurements, the first port may satisfy any of the following:

[0119] No data stream transmission is associated on the first port used only for CSI measurements; that is, no data stream transmission is performed on the first port used only for CSI measurements.

[0120] Data stream transmission is only used on the first port of CSI measurement, meaning that data stream transmission is only performed on the first port of CSI measurement.

[0121] In some implementations, where no data stream transmission is associated on the first port used solely for CSI measurements, at least one of the following (d1) to (d3) can be satisfied:

[0122] (d1) The transmission power of the first or second port used for demodulation is less than or equal to the transmission power of the data stream associated on the first or second port used for demodulation.

[0123] Here, the first port can be any one of the first ports in the set of first ports used for demodulation, and the second port can be any one of the second ports in the set of second ports mentioned above. When no data stream transmission is associated on the first port used solely for CSI measurements, the transmission power of a first port used for demodulation is less than or equal to the transmission power of the associated data stream on that first port, or the transmission power of a second port used for demodulation is less than or equal to the transmission power of the associated data stream on that second port.

[0124] (d2) The power factor or normalization factor of the precoded data stream is related to the data stream associated on the first or second port used for demodulation.

[0125] For example, the formula for calculating the power factor or normalization factor of the pre-coded data stream is related to the flow rate of the data stream associated on the first or second port used for demodulation.

[0126] (d3) The precoded power factor or normalization factor corresponding to the first port used only for CSI measurements is related to the number of the first ports used only for CSI measurements.

[0127] For example, the formula for calculating the precoded power factor or normalization factor corresponding to the first port used only for CSI measurements is related to the specific number of the first ports used only for CSI measurements.

[0128] In cases where data stream transmission is associated on a first port used solely for CSI measurements, in some implementations, the data stream can correspond to predefined transmission parameters to ensure correct demodulation of the data stream. These predefined transmission parameters may include at least one of the following:

[0129] Modulation and Coding Scheme (MCS);

[0130] Data stream count;

[0131] Episode format;

[0132] Precoding matrix;

[0133] Transmission power.

[0134] In some implementations, the first port in the first port set used for CSI measurement can be frequency-hopped across different transmission symbols or transmission times. The first port in the first port set used for CSI measurement can be a first port in the first port set used solely for CSI measurement, or a first port in the first port set used for both CSI measurement and demodulation; no specific limitation is made here. Optionally, frequency hopping of the first port used for CSI measurement across different transmission symbols or transmission times can include at least one of the following:

[0135] The first port used for CSI measurements performs frequency hopping within the first bandwidth (pre-configured bandwidth) according to predefined rules;

[0136] The terminal performs joint CSI measurements on multiple transmission symbols or transmission times (to achieve a similar effect to a large bandwidth);

[0137] Frequency hopping on different transmission symbols and frequency hopping on different transmission times can be enabled individually or simultaneously. Optionally, the transmission parameters of the first port on different transmission times, such as the quasi-colocation (QCL) assumption, the Transmission Configuration Indication (TCI) status, or the spatial relationship information, can remain consistent.

[0138] In some implementations, after performing CSI measurement based on the first resource, the terminal can report the CSI measurement results to the network-side device so that the network-side device can perform resource scheduling, etc., based on the CSI measurement results.

[0139] In this embodiment, the terminal can receive a first port set. When measuring CSI, it can perform CSI measurement based on a first resource, whereby the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set. Thus, since the terminal can utilize at least a portion of the resources of at least one first port for CSI measurement, the resource overhead of measuring CSI information can be reduced, thereby improving the overall transmission capacity of the system.

[0140] like Figure 3 As shown, this application embodiment provides a CSI measurement method 300, which can be executed by a network-side device. In other words, the CSI measurement method can be executed by software or hardware installed on the network-side device. The CSI measurement method includes the following steps.

[0141] S302: The network-side device sends a first port set; wherein, the first resource is used by the terminal to perform CSI measurements, and the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0142] The network-side device can send a first port set to the terminal. The first port set includes at least one first port, which may be at least one DMRS port or a port of other reference signals. After the network-side device sends the first port set to the terminal, the terminal can use the first port set to perform CSI measurements, that is, perform CSI measurements based on at least a portion of the resources corresponding to at least one first port in the first port set.

[0143] In this way, since the terminal can use at least a portion of the resources of at least one first port to measure CSI, the resource overhead of measuring CSI information can be reduced, and the overall transmission capacity of the system can be improved.

[0144] In some implementations, the first port in the first port set may include at least one of the following four cases:

[0145] Case 1: All first ports in the first port set are used for demodulation and CSI measurements.

[0146] For example, all N first ports in the first port set (N is an integer greater than 1) are used for both demodulation and CSI measurement. (It should be noted that although all N first ports can be used for CSI measurement, in practice, the terminal may not use all of these N first ports for CSI measurement.) When performing CSI measurement, the terminal can perform CSI measurement based on at least a portion of the resources corresponding to these N first ports; that is, the terminal can perform CSI measurement based on the total resources corresponding to these N first ports, or based on a portion of the total resources corresponding to these N first ports.

[0147] The second scenario: All first ports in the first port set are used for demodulation, and some first ports are used for CSI measurements.

[0148] For example, all N first ports in the first port set are used for demodulation, and X first ports (X is an integer greater than 0 and less than N) are used for both demodulation and CSI measurement. (It should be noted that although all X first ports can be used for CSI measurement, in practical applications, the terminal may not use all of these X first ports for CSI measurement.) When performing CSI measurement, the terminal can perform CSI measurement based on at least a portion of the resources corresponding to these X first ports; that is, the terminal can perform CSI measurement based on the overall resources corresponding to these X first ports, or based on a portion of the overall resources corresponding to these X first ports.

[0149] The third scenario: Some of the first ports in the first port set are used for demodulation, while all first ports are used for CSI measurements.

[0150] For example, Y out of all N first ports in the first port set (where Y is an integer greater than 0 and less than N) are used for demodulation, and all N first ports are used for CSI measurement (it should be noted that although all N first ports can be used for CSI measurement, in practical applications, the terminal may not use all of these N first ports for CSI measurement). When performing CSI measurement, the terminal can perform CSI measurement based on at least a portion of the resources corresponding to these N first ports; that is, the terminal can perform CSI measurement based on the overall resources corresponding to these N first ports, or based on a portion of the overall resources corresponding to these N first ports. Among the N first ports, X first ports (X = NY) are used only for CSI measurement. These X first ports used only for CSI measurement can be understood as X first ports that are not used for demodulation, for example, X DMRS ports that are not used for demodulation.

[0151] The fourth scenario: All first ports in the first port set are used solely for CSI measurements.

[0152] For example, all N first ports in the first port set are used solely for CSI measurements (it should be noted that although all N first ports can be used for CSI measurements, in practice, the terminal may not use all of these N first ports for CSI measurements). When performing CSI measurements, the terminal can perform CSI measurements based on at least a portion of the resources corresponding to these N first ports; that is, the terminal can perform CSI measurements based on the overall resources corresponding to these N first ports, or based on a portion of the overall resources corresponding to these N first ports. The N first ports used solely for CSI measurements can be understood as the N first ports that do not require demodulation, for example, the N DMRS ports that are not used for demodulation.

[0153] It should be noted that in the first, second, and third scenarios mentioned above, demodulation can be performed on the downlink data channel or the downlink physical shared channel, such as demodulating the PDSCH. When the first port is used to demodulate the PDSCH, this demodulation can be implicitly understood as having an association or mapping relationship between the data stream of the first port and the PDSCH, such as a one-to-one association or mapping.

[0154] In some implementations, for at least one of the first, second, and third scenarios described above, the first resource may satisfy at least one of the following (a1) to (a4):

[0155] (a1) The first resource includes at least a portion of the symbols occupied by at least one first port.

[0156] The symbols occupied by at least one first port may include a prefix symbol and additional symbols. For example, a first resource may include only the prefix symbol occupied by at least one first port, or only at least some of the additional symbols occupied by at least one first port, or include at least the prefix symbol occupied by at least one first port and at least some of the additional symbols. Optionally, in some embodiments, the first resource includes at least some of the symbols occupied by at least one first port, which may include at least one of the following:

[0157] On a first port, the symbol used for CSI measurement is at least one additional symbol for that first port;

[0158] On a first port, the symbol used for CSI measurements is the prefix symbol of that first port.

[0159] A first port here can be each of at least one first port, or it can be each of a subset of at least one first port; no specific limitation is made here. For a first port, the symbol used to measure CSI on that first port can be at least one additional symbol of that first port, or a prefix symbol of that first port, or a prefix symbol of that first port and at least one additional symbol.

[0160] For example, taking the first port as the DMRS port, on a DMRS port, the symbol used to measure CSI can be the DMRS prefix symbol, or the DMRS additional symbol, or the DMRS prefix symbol and some additional symbols. When measuring CSI, the terminal can perform CSI measurement based on the DMRS additional symbol, or based on the DMRS prefix symbol, or based on the DMRS prefix symbol and some additional symbols.

[0161] (a2) The first resource includes at least a portion of the frequency domain resources occupied by at least one first port.

[0162] Optionally, in some embodiments, the first resource includes at least a portion of the frequency domain resources occupied by at least one first port, and may include at least one of the following (a21) to (a23):

[0163] (a21) On a first port, the frequency domain resources used for CSI measurements are a subset of the frequency domain resources used for demodulation.

[0164] For example, within an RB, the RE used for CSI measurements is a subset of all REs occupied by that first port.

[0165] For example, within a CDM group, the RE used for CSI measurements is a subset of the REs occupied by the first port within that CDM group.

[0166] For example, CSI measurements are performed on certain subbands of the first port, but not on other subbands.

[0167] (a22) On a first port, the frequency domain density used for CSI measurement is 1 / M of the frequency domain density used for demodulation, where M is a positive integer.

[0168] For example, at the RB granularity, the frequency domain density used for CSI measurement is 1 / 2 times that used for demodulation, meaning that the frequency domain resources used for CSI measurement occupy half of the RB resources with one RB as the interval.

[0169] For example, within a single RB, at the RE granularity, the frequency domain density used for CSI measurements is 1 / 6 of the frequency domain density used for demodulation. Taking a pattern similar to Type 1 DMRS as an example, a certain port occupies 6 REs, and the RE used for CSI measurements is one of those 6 REs. The specific RE can be determined by the RE offset; of course, this RE offset can also be used to determine multiple REs, but this will not be elaborated upon here.

[0170] (a23) On a first port, the frequency domain resources used for demodulation are a subset of the frequency domain resources used for CSI measurements.

[0171] For example, the bandwidth used for CSI measurement is greater than or equal to the bandwidth used for demodulation. Specifically, if an extra symbol in DMRS is used for CSI measurement and a preceding symbol is used for demodulation, the bandwidth on the extra symbol can be greater than the bandwidth on the preceding symbol. If the preceding symbol is used for CSI measurement and the extra symbol is used for demodulation, the bandwidth on the preceding symbol can be greater than the bandwidth on the extra symbol.

[0172] It should be noted that one of the first ports in (a21) to (a23) above can be each of the at least one first port, or it can be each of the ports in a subset of the at least one first port, without any specific limitation here.

[0173] (a3) The first resource includes at least a portion of the transmission opportunities occupied by at least one first port.

[0174] For example, taking the first port as a DMRS port, the first resource may include at least a portion of the transmission slots of at least one DMRS port. When measuring CSI, the terminal can perform CSI measurement on a portion of the transmission slots of at least one DMRS port. For example, the DMRS port transmits on N slots, but the slots used for CSI measurement are only some specific slots, such as some specific slots agreed upon by the protocol by default.

[0175] (a4) In the first resource, at least a portion of the first ports in at least one of the first ports correspond to different second resources, and the second resource is a resource used for CSI measurement.

[0176] The first resource describes the overall time-frequency resources for CSI measurements corresponding to at least one first port, and the second resource describes the time-frequency resources for CSI measurements corresponding to a specific first port. In at least one first port, the second resources are different for different first ports, or, in some ports of at least one first port, the second resources are different for different first ports. For example, at least one first port includes first port #1 and second port #2, and the frequency domain resources for CSI measurements performed on first port #1 are different from those for CSI measurements performed on first port #2. Another example is that the symbol for CSI measurements performed on first port #1 is different from the symbol for CSI measurements performed on first port #2.

[0177] For the third scenario described above (where some first ports in the first port set are used for demodulation, and all first ports are used for CSI measurements), the first port set includes X first ports used only for CSI measurements and Y first ports used for demodulation (where X and Y are both positive integers, and X = NY, and N is the number of ports in the first port set). In this case, in some implementations, the first resource can satisfy at least one of the following (b1) to (b5):

[0178] (b1) In the first resource, the symbols occupied by X first ports are a subset of the symbols occupied by Y first ports.

[0179] For example, the first port used for demodulation occupies 2 symbols (such as one preamplifier symbol and one extra symbol), while the first port used for CSI measurement occupies 1 symbol (such as the extra symbol).

[0180] (b2) In the first resource, the frequency domain resources occupied by X first ports are a subset of the frequency domain resources occupied by Y first ports. In this case, the two can be multiplexed using CDM.

[0181] For example, taking a pattern similar to Type 2 DMRS as an example, in a CDM group, the first port used for demodulation occupies 4 REs, while the first port used for CSI measurement occupies 2 of them.

[0182] For example, the first port used for demodulation occupies 20 RBs, while the first port used for CSI measurement occupies 10 of those RBs, meaning the frequency domain density is 1 / 2.

[0183] (b3) In the first resource, X first ports and Y first ports occupy different frequency domain resources. In this case, they can be multiplexed based on FDM.

[0184] For example, the first port used for demodulation and the first port used for CSI measurement belong to different CDM groups.

[0185] (b4) In the first resource, X first ports and Y first ports occupy different symbols.

[0186] For example, the first port used for demodulation occupies a prefix symbol, the first port used for CSI measurement occupies an additional symbol, or the first port used for demodulation occupies an additional symbol, and the first port used for CSI measurement occupies a prefix symbol.

[0187] (b5) In the first resource, the bandwidth of X first ports is greater than or equal to the bandwidth of Y first ports.

[0188] For the fourth scenario described above (where all first ports in the first port set are used solely for CSI measurements), some implementations may include the following steps:

[0189] The network-side device sends a second port set, which includes a second port for demodulation. The first port in the first port set and the second port in the second port set are multiplexed.

[0190] Network-side devices can send a second port set to the terminal. The second port set may include at least one second port, which may be used solely for demodulation (e.g., demodulating PDSCH). If all first ports in the first port set are used for CSI measurements, the first ports in the first port set may be multiplexed with the second ports in the second port set.

[0191] In some implementations, the first port in the first port set and the second port in the second port set are multiplexed to satisfy at least one of the following (c1) to (c7):

[0192] (c1) The symbols occupied by the first port are a subset of the symbols occupied by the second port.

[0193] For example, the first port is only multiplexed with the second port on the extra symbol of the second port.

[0194] (c2) The transmission time occupied by the first port is a subset of the transmission time occupied by the second port.

[0195] For example, the first port is only multiplexed with the second port during some transmission times.

[0196] (c3) The frequency domain resources occupied by the first port are a subset of the frequency domain resources occupied by the second port;

[0197] For example, the first port can be multiplexed with the second port within the same CDM group.

[0198] For example, CSI measurements might be performed on certain subbands of the first port, but not on other subbands. Meanwhile, the second port might use all its subbands or the entire bandwidth for demodulation.

[0199] (c4) Frequency division multiplexing is performed between the first port and the second port.

[0200] For example, the first port can be multiplexed with the second port in a CDM group that is not occupied by the second port (for example, if the second port occupies CDM group 1, then the first port occupies CDM group 2).

[0201] (c5) In different transmission times, different first ports and second ports in the first port set are multiplexed.

[0202] For example, at different transmission times, different first ports and second ports are multiplexed, and finally, the CSI measurements performed by the first ports at multiple transmission times form a complete CSI information.

[0203] (c6) Within the same RB, the frequency domain resources occupied by the first port are less than or equal to the frequency domain resources occupied by the second port.

[0204] (c7) The bandwidth of the first port is greater than or equal to the bandwidth of the second port.

[0205] In some implementations, the first port set may include first ports used only for CSI measurements, such as the X first ports used only for CSI measurements in the third case described above, or all first ports used only for CSI measurements in the fourth case described above. For a first port in the first port set used only for CSI measurements, the first port may satisfy any of the following:

[0206] No data stream transmission is associated on the first port used solely for CSI measurements; that is, the network-side device does not transmit data streams on the first port used solely for CSI measurements.

[0207] Associated data stream transmission is performed on the first port used only for CSI measurements, meaning that the network-side device transmits data streams on the first port used only for CSI measurements.

[0208] In some implementations, where no data stream transmission is associated on the first port used solely for CSI measurements, at least one of the following (d1) to (d3) can be satisfied:

[0209] (d1) The transmission power of the first or second port used for demodulation is less than or equal to the transmission power of the data stream associated on the first or second port used for demodulation.

[0210] Here, the first port can be any one of the first ports in the set of first ports used for demodulation, and the second port can be any one of the second ports in the set of second ports mentioned above. When no data stream transmission is associated on the first port used solely for CSI measurements, the transmission power of a first port used for demodulation is less than or equal to the transmission power of the associated data stream on that first port, or the transmission power of a second port used for demodulation is less than or equal to the transmission power of the associated data stream on that second port.

[0211] (d2) The power factor or normalization factor of the pre-coded data stream is related to the data stream associated on the first or second port used for demodulation.

[0212] For example, the formula for calculating the power factor or normalization factor of the pre-coded data stream is related to the flow rate of the data stream associated on the first or second port used for demodulation.

[0213] (d3) The precoded power factor or normalization factor corresponding to the first port used only for CSI measurements is related to the number of the first ports used only for CSI measurements.

[0214] For example, the formula for calculating the precoded power factor or normalization factor corresponding to the first port used only for CSI measurements is related to the specific number of the first ports used only for CSI measurements.

[0215] In cases where data stream transmission is associated on a first port used solely for CSI measurements, in some implementations, the data stream can correspond to predefined transmission parameters to ensure correct demodulation of the data stream. These predefined transmission parameters may include at least one of the following:

[0216] MCS;

[0217] Data stream count;

[0218] Episode format;

[0219] Precoding matrix;

[0220] Transmission power.

[0221] In some implementations, the first port in the first port set used for CSI measurement can be frequency-hopped across different transmission symbols or transmission times. The first port in the first port set used for CSI measurement can be a first port in the first port set used solely for CSI measurement, or a first port in the first port set used for both CSI measurement and demodulation; no specific limitation is made here. Optionally, frequency hopping of the first port used for CSI measurement across different transmission symbols or transmission times can include at least one of the following:

[0222] The first port used for CSI measurements performs frequency hopping within the first bandwidth (pre-configured bandwidth) according to predefined rules;

[0223] Multiple transmission symbols or transmission timings are used by the terminal to perform joint CSI measurements (achieving a similar effect to high bandwidth);

[0224] Frequency hopping on different transmission symbols and frequency hopping on different transmission times can be enabled individually or simultaneously. Optionally, the transmission parameters of the first port on different transmission times, such as QCL assumption, TCI state, or spatial relationship information, can remain consistent.

[0225] In some implementations, after performing CSI measurements based on the first resource, the terminal can report the CSI measurement results to the network-side device. The network-side device can receive the CSI measurement results reported by the terminal and then perform resource scheduling, etc., based on the CSI measurement results.

[0226] In this embodiment, the network-side device can send a first port set. When the terminal measures CSI, it can perform CSI measurement based on a first resource. The first resource includes at least a portion of the resources corresponding to at least one first port in the first port set. Thus, since the terminal can utilize at least a portion of the resources of at least one first port for CSI measurement, the resource overhead of measuring CSI information can be reduced, and the overall transmission capacity of the system can be improved.

[0227] To facilitate understanding of the CSI measurement method provided in the embodiments of this application, several more specific implementation methods will be used as examples below.

[0228] Example 1: Description of CSI measurement resources, mainly divided into the following four cases.

[0229] Case 1: All N first ports in the first port set are used for demodulation and CSI measurement.

[0230] Assume the first set of ports received by the UE is N = 4 DMRS ports. These 4 DMRS ports are associated with 4 PDSCH data streams, meaning they are used for demodulation of 4 data streams. At this point, the UE can perform CSI measurements based on these 4 DMRS ports for subsequent PDSCH transmission-related CSI updates, such as Precoding Matrix Indicator (PMI), Channel Quality Indicator (CQI), Rank Indication (RI), and Layer Indicator (LI).

[0231] For data stream demodulation, the UE can perform DMRS reception and channel estimation based on all time-frequency resources occupied by the four DMRS ports. However, for CSI measurement, to reduce the complexity of CSI measurement for the UE (related to the CPU usage of CSI measurement), the UE can perform CSI measurement based only on a portion of the time-frequency resources (i.e., the first resource) of the four DMRS ports. For example, assuming the four DMRS ports occupy two symbols, the UE can perform CSI measurement on only one symbol, and does not need to measure all frequency domain resources on that symbol, but only a portion of the frequency domain resources, such as... Figure 4 As shown. In Figure 4 In this scenario, assume that the four DMRS ports (gray) occupy symbols #3 and #11. In this case, the first resource for the UE to measure CSI can be a portion of the frequency domain resources (black) on symbol #11, obtaining the CSI information corresponding to the four DMRS ports.

[0232] It should be noted that the determination of the aforementioned first resource can be a default agreement in the protocol.

[0233] The second scenario: All N first ports in the first port set are used for demodulation, and X first ports are used for CSI measurements, where X is a positive integer less than N.

[0234] Assume the UE receives a first set of N = 4 DMRS ports, each associated with a data stream from a PDSCH; these 4 DMRS ports are used for demodulating the four data streams. In this case, the UE can perform CSI measurements based on X = 2 of these DMRS ports. The advantage of this is that the UE can measure CSI information corresponding to a specific number of ports without needing to measure all N DMRS ports, thus improving the flexibility of CSI measurement and reducing the complexity of the UE. Furthermore, when measuring CSI on two DMRS ports, the UE can perform CSI measurements based only on a portion of the time-frequency resources (i.e., the first resource) of those two DMRS ports. For example, assuming the two DMRS ports occupy two symbols, the UE can perform CSI measurements on only one symbol, and does not need to measure all frequency domain resources on that symbol, only a portion of the frequency domain resources.

[0235] The third case: Y of the N first ports in the first port set are used for demodulation, and N first ports are used for CSI measurement. Among the N first ports, X = NY first ports are used only for CSI measurement, where X and Y are both positive integers less than N.

[0236] Assume the first set of ports received by the UE consists of N = 3 DMRS ports, where Y = 1 DMRS port is associated with 1 PDSCH data stream, meaning 1 DMRS port is used for demodulation of 1 data stream and can also be used for CSI measurement. Additionally, NY = 2 DMRS ports are used solely for CSI measurement. In other words, CSI measurement can be performed based on N = 3 DMRS ports. The resources occupied by the NY = 2 DMRS ports used solely for CSI measurement can differ from those occupied by the Y = 1 DMRS port used for demodulation.

[0237] For example, the number of resources occupied by the two DMRS ports used for CSI measurements is less than the number of resources occupied by the DMRS ports used for demodulation. For example, within the same RB, the number of REs occupied by the DMRS ports used for CSI measurements on the same symbol is less than the number of REs occupied by the DMRS ports used for demodulation. The DMRS ports used for CSI measurements can be multiplexed only on a portion of the symbols of the DMRS ports used for demodulation.

[0238] like Figure 5As shown, taking a pattern similar to DMRS Type 2 as an example, the one DMRS port (gray) used for demodulation occupies two symbols, namely symbols #3 and #11, and uses 4 REs on each symbol. The two ports (black) used for CSI measurements only occupy 2 REs on symbol #3, and are FDM multiplexed with the one DMRS port used for demodulation. The two DMRS ports used for CSI measurements can be CDM multiplexed using OCC, or they can each occupy one RE for FDM multiplexing.

[0239] like Figure 6 As shown, within the same RB, the REs occupied by the DMRS port used for CSI measurements are a subset of the REs occupied by the DMRS port used for demodulation. Figure 6 In the example of a pattern similar to DMRS Type 2, the DMRS port used for demodulation (gray) occupies two symbols, namely symbols #3 and #11, and occupies 4 REs on each symbol; while one of the two DMRS ports used for CSI measurement (black) occupies the last two REs on symbol #3 that overlap with the DMRS port used for demodulation. In this case, the two DMRS ports used for CSI measurement can be CDM multiplexed through OCC.

[0240] like Figure 7 As shown, the number of RBs occupied by the DMRS port used for CSI measurements is half the number of RBs occupied by the DMRS port used for demodulation. Figure 7 In the diagram, the DMRS port (gray) used for demodulation occupies resources on every RB, while the DMRS port (black) used for CSI measurements occupies resources on only half of the RBs.

[0241] The fourth case: All N first ports in the first port set are used for CSI measurements.

[0242] Assume the first port set received by the UE includes 8 DMRS ports for CSI measurements. These 8 DMRS ports are multiplexed with a second port set, which contains 4 DMRS ports for demodulation. To maintain orthogonality between the two, multiplexing can be achieved through time-division / frequency-division / code-division multiplexing. Figure 8 As shown, the four DMRS ports used for demodulation (gray) occupy two symbols and a portion of the frequency domain resources (REs at even-numbered index positions) on those two symbols. In this case, the eight DMRS ports used for CSI measurements can be multiplexed at the REs at odd-numbered index positions on these two symbols, thus achieving port orthogonality. The resource locations occupied by the eight DMRS ports can be configured through signaling or agreed upon by protocol defaults. Figure 8In this example, we assume that each of the DMRS ports 1 to 8 used for CSI measurements occupies one RE. Of course, the pattern for each DMRS port used for CSI measurements can also be other cases, such as a pattern consisting of multiple REs.

[0243] When measuring CSI, the UE can perform CSI measurements based on the eight DMRS ports, such as measuring PMI information, channel matrix, covariance matrix, or channel correlation matrix.

[0244] It should be noted that the above 8 DMRS ports can also be replaced with CSI-RS ports, such as non-periodic CSI-RS ports, which will not be elaborated here.

[0245] Example 2: Explanation of the timing of measurement.

[0246] Regarding the timing of DMRS transmission, if CSI measurements are required at that transmission time, there are two scenarios:

[0247] (1) CSI measurements are completed during a single transmission.

[0248] (2) CSI measurements are performed at multiple transmission times.

[0249] For case (1), it applies when the port used for CSI measurement is fully mapped at a transmission time. In this case, a complete set of CSI information, including the CSI information corresponding to the required port, can be measured based on the transmission time.

[0250] Regarding scenario (2), it applies to situations where the ports used for CSI measurement need to be fully mapped across multiple transmission times. For example, if only a portion of the ports used for CSI measurement can be mapped at one transmission time, then CSI measurement needs to be performed through ports at multiple transmission times. Ultimately, the CSI measurements from the ports at these multiple transmission times can be combined to form a complete set of CSI information, including the CSI information corresponding to the required ports.

[0251] The following is an example for situation (2), such as Figure 9 As shown.

[0252] Assume that two streams of data are transmitted in both transmission timing #1 and transmission timing #2, corresponding to two DMRS ports (grey) used for demodulation. To measure the CSI information corresponding to 24 DMRS ports (this example uses 24 DMRS ports as an example, but other numbers are possible), the ports used for CSI measurement (DMRS ports 1-12) are transmitted in transmission timing #1, and the ports used for CSI measurement (DMRS ports 13-24) are transmitted in transmission timing #2. Therefore, based on these two transmission timings, the UE can measure the complete CSI information corresponding to all 24 DMRS ports, such as the PMI, channel matrix, and channel correlation matrix.

[0253] Furthermore, the timing of CSI measurements during transmission can also be determined. This can be achieved by, for example, by a protocol default setting regarding which transmission times are used for CSI measurements; this default setting can be related to data scheduling, the number of ports, and other factors.

[0254] Example 3: Explanation of bandwidth measurement.

[0255] To improve the performance of CSI measurements, the bandwidth used by the DMRS port for CSI measurements can be greater than the bandwidth used by the DMRS port for demodulation.

[0256] For example, the bandwidth occupied by the same DMRS port can differ across all symbols. For instance, the bandwidth on an additional symbol can be greater than the bandwidth on the preceding symbol. Figure 10 An example is given in the text. In this example, the bandwidth 1 corresponding to the front symbol (black) of the DMRS port is less than the bandwidth 2 corresponding to the extra symbol (gray). Of course, the bandwidth corresponding to the front symbol can also be greater than the bandwidth corresponding to the extra symbol. The UE can perform CSI measurements on the symbol with the larger bandwidth, thereby improving the performance of CSI measurements.

[0257] Furthermore, the bandwidth corresponding to the same symbol on different DMRS ports can also be different. For example, if DMRS port #1 is used for demodulation and DMRS port #2 is used for CSI measurement, then on the same symbol, the bandwidth occupied by DMRS port #2 (gray) can be greater than the bandwidth occupied by DMRS port #1 (black). Figure 11 As shown.

[0258] Example 4: Explanation of data stream mapping.

[0259] Regarding whether data stream transmission occurs on the DMRS port used for CSI measurements, i.e., whether a DMRS port used solely for CSI measurements is associated with a data stream:

[0260] (1) If no data stream is transmitted, the power on the symbols of the DMRS ports used for CSI measurements that are not transmitting data can be used for the transmission of data streams corresponding to other ports. In other words, power boosting can be performed on the data streams corresponding to other ports. For example, there are two DMRS ports used for demodulation and two DMRS ports used for CSI measurements. The two DMRS ports used for demodulation are associated with the transmission of two data streams, while the two DMRS ports used for CSI measurements are not associated with the transmission of data streams. In this case, the power on these two DMRS ports that are not transmitting data streams can be used to boost the power of the two data streams associated with the other two DMRS ports used for demodulation. This will result in the transmission power on the DMRS being different from the transmission power of the data stream for the same DMRS port. Of course, power boosting can also be omitted, which is equivalent to the data stream portion not being fully powered.

[0261] (2) If data stream transmission is performed, the transmission parameters of the data stream corresponding to the DMRS port used for CSI measurement (which may not require precoding) can be specifically designed to ensure the transmission performance of these data streams. For example, the MCS of the data stream can be low, or a specific transmit diversity / precoding method can be applied. Alternatively, the rank of the data stream transmitted on the DMRS port used for CSI measurement can be agreed upon by default, which also helps improve demodulation performance. Furthermore, to further eliminate interference between the data stream associated with the DMRS port used for demodulation and the data stream associated with the DMRS port used for CSI measurement, they can be assigned different spatial relationships, such as transmit beams or receive beams, or different QCL assumptions or TCI states, thereby reducing interference between them.

[0262] The CSI measurement method provided in this application embodiment can utilize the DMRS port to measure CSI, thereby reducing the resource overhead of measuring CSI information and improving the overall transmission capacity of the system.

[0263] The CSI measurement method provided in this application can be executed by a CSI measurement device. This application uses an example of a CSI measurement device executing the CSI measurement method to illustrate the CSI measurement device provided in this application.

[0264] This application provides a CSI measurement device. As an example, the CSI measurement device can be a communication device or a component within a communication device, such as a chip. The communication device can be a terminal, a network-side device, or a server, etc. Exemplarily, the terminal can be, but is not limited to, the type of terminal 11 listed above, and the network-side device can be, but is not limited to, the type of network-side device 12 listed above. This application does not impose specific limitations.

[0265] CSI measurement equipment includes a receiving module, a transmitting module, and a processing module. These modules can be implemented in software or hardware. When implemented in hardware, the processing module can be implemented by a processor. For example, the processor can include general-purpose processors, special-purpose processors, such as a Central Processing Unit (CPU), microprocessor, Digital Signal Processor (DSP), Artificial Intelligence (AI) processor, Graphics Processing Unit (GPU), Application Specific Integrated Circuit (ASIC), Network Processor (NP), Field Programmable Gate Array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc. The receiving and transmitting modules can be implemented by a communication interface, which can include one or more of the following: transceiver, pins, circuits, bus, radio frequency unit, etc.

[0266] For details, see Figure 12 When the CSI measurement device is a terminal or a component within a terminal, the CSI measurement device 1200 includes a receiving module 1201 and a processing module 1202, wherein:

[0267] Receiver module 1201 is used to receive the first port set;

[0268] Processing module 1202 is used to perform channel state information (CSI) measurement based on a first resource, wherein the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0269] Optionally, in some implementations, the first port in the first port set includes at least one of the following:

[0270] In the first scenario, all first ports in the first port set are used for demodulation and CSI measurements;

[0271] In the second scenario, all first ports in the first port set are used for demodulation, and some first ports are used for CSI measurement.

[0272] In the third scenario, some of the first ports in the first port set are used for demodulation, while all first ports are used for CSI measurements.

[0273] In the fourth scenario, all first ports in the first port set are used solely for CSI measurements.

[0274] Optionally, in some implementations, for at least one of the first, second, and third scenarios, the first resource satisfies at least one of the following:

[0275] The first resource includes at least a portion of the symbols occupied by the at least one first port;

[0276] The first resource includes at least a portion of the frequency domain resources occupied by the at least one first port;

[0277] The first resource includes at least a portion of the transmission opportunities occupied by the at least one first port;

[0278] In the first resource, at least some of the first ports in the at least one first port correspond to different second resources, and the second resource is a resource used for CSI measurement.

[0279] Optionally, in some implementations, the first resource includes at least a portion of the symbols occupied by the at least one first port, including at least one of the following:

[0280] On one of the first ports, the symbol used for CSI measurement is at least one additional symbol for the first port;

[0281] On one of the first ports, the symbol used for CSI measurement is the prefix symbol of the first port.

[0282] Optionally, in some embodiments, the first resource includes at least a portion of the frequency domain resources occupied by the at least one first port, including at least one of the following:

[0283] On one of the first ports, the frequency domain resources used for CSI measurements are a subset of the frequency domain resources used for demodulation;

[0284] On one of the first ports, the frequency domain density used for CSI measurement is 1 / M of the frequency domain density used for demodulation, where M is a positive integer;

[0285] On one of the first ports, the frequency domain resources used for demodulation are a subset of the frequency domain resources used for CSI measurements.

[0286] Optionally, in some implementations, for the X first ports used only for CSI measurements and the Y first ports used for demodulation in the third case, where X and Y are both positive integers, the first resources satisfy at least one of the following:

[0287] In the first resource, the symbols occupied by the X first ports are a subset of the symbols occupied by the Y first ports;

[0288] In the first resource, the frequency domain resources occupied by the X first ports are a subset of the frequency domain resources occupied by the Y first ports;

[0289] In the first resource, the X first ports and the Y first ports occupy different frequency domain resources;

[0290] In the first resource, the X first ports and the Y first ports occupy different symbols;

[0291] In the first resource, the bandwidth of the X first ports is greater than or equal to the bandwidth of the Y first ports.

[0292] Optionally, in some embodiments, for the fourth case, the receiving module 1201 is further configured to:

[0293] A second port set is received, which includes a second port for demodulation, and the first port in the first port set is multiplexed with the second port in the second port set.

[0294] Optionally, in some implementations, the first port in the first port set and the second port in the second port set are multiplexed, satisfying at least one of the following:

[0295] The symbols occupied by the first port are a subset of the symbols occupied by the second port;

[0296] The transmission opportunities occupied by the first port are a subset of the transmission opportunities occupied by the second port;

[0297] The frequency domain resources occupied by the first port are a subset of the frequency domain resources occupied by the second port;

[0298] Frequency division multiplexing is performed between the first port and the second port;

[0299] In different transmission scenarios, different first ports and second ports in the first port set are multiplexed;

[0300] Within the same resource block RB, the frequency domain resources occupied by the first port are less than or equal to the frequency domain resources occupied by the second port;

[0301] The bandwidth corresponding to the first port is greater than or equal to the bandwidth corresponding to the second port.

[0302] Optionally, in some implementations, only the first port in the first port set used for CSI measurements satisfies any of the following:

[0303] The first port, used solely for CSI measurements, does not have associated data stream transmission.

[0304] The associated data stream transmission is used only on the first port for CSI measurements.

[0305] Optionally, in some implementations, where no data stream transmission is associated on the first port used solely for CSI measurements, at least one of the following conditions must be met:

[0306] The transmission power of the first or second port used for demodulation is less than or equal to the transmission power of the data stream associated on the first or second port used for demodulation.

[0307] The power factor or normalization factor of the pre-coded data stream is related to the data stream associated on the first or second port used for demodulation.

[0308] The precoded power factor or normalization factor corresponding to the first port used only for CSI measurements is related to the number of the first ports used only for CSI measurements.

[0309] Optionally, in some implementations, when data stream transmission is associated on the first port used solely for CSI measurements, the data stream corresponds to predefined transmission parameters, which include at least one of the following:

[0310] Modulation and coding scheme (MCS);

[0311] Data stream count;

[0312] Episode format;

[0313] Precoding matrix;

[0314] Transmission power.

[0315] Optionally, in some implementations, the first port used for CSI measurements performs frequency hopping on different transmission symbols or transmission times, including at least one of the following:

[0316] The first port used for CSI measurement performs frequency hopping within the first bandwidth according to a predefined rule;

[0317] The terminal performs joint CSI measurements on multiple of the transmitted symbols or transmission times;

[0318] The frequency hopping on different transmission symbols and the frequency hopping at different transmission times can be enabled individually or simultaneously.

[0319] SeeFigure 13 When the CSI measurement device is a network-side device or a component in a network-side device, the CSI measurement device 1300 includes a transmission module 1301, which is used to transmit a first port set.

[0320] The first resource is used by the terminal to perform CSI measurements, and the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set.

[0321] Optionally, in some implementations, the first port in the first port set includes at least one of the following:

[0322] In the first scenario, all first ports in the first port set are used for demodulation and CSI measurements;

[0323] In the second scenario, all first ports in the first port set are used for demodulation, and some first ports are used for CSI measurement.

[0324] In the third scenario, some of the first ports in the first port set are used for demodulation, while all first ports are used for CSI measurements.

[0325] In the fourth scenario, all first ports in the first port set are used solely for CSI measurements.

[0326] Optionally, in some implementations, for at least one of the first, second, and third scenarios, the first resource satisfies at least one of the following:

[0327] The first resource includes at least a portion of the symbols occupied by the at least one first port;

[0328] The first resource includes at least a portion of the frequency domain resources occupied by the at least one first port;

[0329] The first resource includes at least a portion of the transmission opportunities occupied by the at least one first port;

[0330] In the first resource, at least some of the first ports in the at least one first port correspond to different second resources, and the second resource is a resource used for CSI measurement.

[0331] Optionally, in some implementations, the first resource includes at least a portion of the symbols occupied by the at least one first port, including at least one of the following:

[0332] On one of the first ports, the symbol used for CSI measurement is at least one additional symbol for the first port;

[0333] On one of the first ports, the symbol used for CSI measurement is the prefix symbol of the first port.

[0334] Optionally, in some embodiments, the first resource includes at least a portion of the frequency domain resources occupied by the at least one first port, including at least one of the following:

[0335] On one of the first ports, the frequency domain resources used for CSI measurements are a subset of the frequency domain resources used for demodulation;

[0336] On one of the first ports, the frequency domain density used for CSI measurement is 1 / M of the frequency domain density used for demodulation, where M is a positive integer;

[0337] On one of the first ports, the frequency domain resources used for demodulation are a subset of the frequency domain resources used for CSI measurements.

[0338] Optionally, in some implementations, for the X first ports used only for CSI measurements and the Y first ports used for demodulation in the third case, where X and Y are both positive integers, the first resources satisfy at least one of the following:

[0339] In the first resource, the symbols occupied by the X first ports are a subset of the symbols occupied by the Y first ports;

[0340] In the first resource, the frequency domain resources occupied by the X first ports are a subset of the frequency domain resources occupied by the Y first ports;

[0341] In the first resource, the X first ports and the Y first ports occupy different frequency domain resources;

[0342] In the first resource, the X first ports and the Y first ports occupy different symbols;

[0343] In the first resource, the bandwidth of the X first ports is greater than or equal to the bandwidth of the Y first ports.

[0344] Optionally, in some embodiments, for the fourth case, the sending module 1301 is further configured to:

[0345] A second port set is sent, which includes a second port for demodulation, and the first port in the first port set is multiplexed with the second port in the second port set.

[0346] Optionally, in some implementations, the first port in the first port set and the second port in the second port set are multiplexed, satisfying at least one of the following:

[0347] The symbols occupied by the first port are a subset of the symbols occupied by the second port;

[0348] The transmission opportunities occupied by the first port are a subset of the transmission opportunities occupied by the second port;

[0349] The frequency domain resources occupied by the first port are a subset of the frequency domain resources occupied by the second port;

[0350] Frequency division multiplexing is performed between the first port and the second port;

[0351] In different transmission scenarios, different first ports and second ports in the first port set are multiplexed;

[0352] Within the same RB, the frequency domain resources occupied by the first port are less than or equal to the frequency domain resources occupied by the second port;

[0353] The bandwidth corresponding to the first port is greater than or equal to the bandwidth corresponding to the second port.

[0354] Optionally, in some implementations, only the first port in the first port set used for CSI measurements satisfies any of the following:

[0355] The first port, used solely for CSI measurements, does not have associated data stream transmission.

[0356] The associated data stream transmission is used only on the first port for CSI measurements.

[0357] Optionally, in some implementations, where no data stream transmission is associated on the first port used solely for CSI measurements, at least one of the following conditions must be met:

[0358] The transmission power of the first or second port used for demodulation is less than or equal to the transmission power of the data stream associated on the first or second port used for demodulation.

[0359] The precoded power factor or normalization factor corresponding to the data stream is related to the data stream associated on the first or second port used for demodulation;

[0360] The precoded power factor or normalization factor corresponding to the first port used only for CSI measurements is related to the number of the first ports used only for CSI measurements.

[0361] Optionally, in some implementations, when data stream transmission is associated on the first port used solely for CSI measurements, the data stream corresponds to predefined transmission parameters, which include at least one of the following:

[0362] MCS;

[0363] Data stream count;

[0364] Episode format;

[0365] Precoding matrix;

[0366] Transmission power.

[0367] Optionally, in some implementations, the first port used for CSI measurements performs frequency hopping on different transmission symbols or transmission times, including at least one of the following:

[0368] The first port used for CSI measurement performs frequency hopping within the first bandwidth according to a predefined rule;

[0369] Multiple transmission symbols or transmission timings are used by the terminal to perform joint CSI measurements;

[0370] The frequency hopping on different transmission symbols and the frequency hopping at different transmission times can be enabled individually or simultaneously.

[0371] In this embodiment, the terminal can receive a first port set sent by the network-side device. When measuring CSI, CSI measurement can be performed based on a first resource, which includes at least a portion of the resources corresponding to at least one first port in the first port set. Thus, since the terminal can utilize at least a portion of the resources of at least one first port for CSI measurement, the resource overhead of measuring CSI information can be reduced, and the overall transmission capacity of the system can be improved.

[0372] The CSI measurement device provided in this application embodiment can achieve... Figures 2-3 The various processes implemented in the method embodiments achieve the same technical effect, and will not be described again here to avoid repetition.

[0373] like Figure 14 As shown, this application embodiment also provides a communication device 1400, including a processor 1401 and a memory 1402. The memory 1402 stores a program or instructions that can run on the processor 1401. For example, when the communication device 1400 is a terminal, the program or instructions executed by the processor 1401 implement the various steps of the above-described CSI measurement method embodiment and achieve the same technical effect. When the communication device 1400 is a network-side device, the program or instructions executed by the processor 1401 implement the various steps of the above-described CSI measurement method embodiment and achieve the same technical effect. To avoid repetition, further details are omitted here.

[0374] This application embodiment also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement, for example...Figure 2 The steps in the method embodiment shown are illustrated. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this terminal embodiment and achieve the same technical effect. The terminal can be... Figure 12 The CSI measurement device shown. Specifically, Figure 15 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0375] The terminal 1500 includes, but is not limited to, at least some of the following components: radio frequency unit 1501, network module 1502, audio output unit 1503, input unit 1504, sensor 1505, display unit 1506, user input unit 1507, interface unit 1508, memory 1509, and processor 1510.

[0376] Those skilled in the art will understand that the terminal 1500 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1510 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 15 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0377] It should be understood that, in this embodiment, the input unit 1504 may include a graphics processor 15041 and a microphone 15042. The graphics processor 15041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1506 may include a display panel 15061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1507 includes a touch panel 15071 and at least one of other input devices 15072. The touch panel 15071 is also called a touch screen. The touch panel 15071 may include a touch detection device and a touch controller. Other input devices 15072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0378] In this embodiment, after receiving downlink data from the network-side device, the radio frequency unit 1501 can transmit it to the processor 1510 for processing; in addition, the radio frequency unit 1501 can send uplink data to the network-side device. Typically, the radio frequency unit 1501 includes, but is not limited to, antennas, amplifiers, transceivers, couplers, low-noise amplifiers, duplexers, etc.

[0379] The memory 1509 can be used to store software programs or instructions, as well as various data. The memory 1509 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1509 may include volatile memory or non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1509 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0380] Processor 1510 may include one or more processing units; optionally, processor 1510 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1510.

[0381] The radio frequency unit 1501 is used to receive the first port set;

[0382] Processor 1510 is configured to perform channel state information (CSI) measurement based on a first resource, the first resource including at least a portion of the resources corresponding to at least one first port in the first port set.

[0383] In this embodiment, the terminal can receive a first port set. When measuring CSI, it can perform CSI measurement based on a first resource, whereby the first resource includes at least a portion of the resources corresponding to at least one first port in the first port set. Thus, since the terminal can utilize at least a portion of the resources of at least one first port for CSI measurement, the resource overhead of measuring CSI information can be reduced, thereby improving the overall transmission capacity of the system.

[0384] It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiment 200 and achieve the same or corresponding technical effects. To avoid repetition, it will not be described again here.

[0385] This application embodiment also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement, for example... Figure 3 The steps of the method embodiment shown are illustrated. This network-side device embodiment corresponds to the above-described network-side device method embodiment. All implementation processes and methods of the above-described method embodiments can be applied to this network-side device embodiment and can achieve the same technical effect.

[0386] Specifically, embodiments of this application also provide a network-side device, which can be... Figure 13 The CSI measuring device shown is as follows. Figure 16 As shown, the network-side device 1600 includes: an antenna 161, a radio frequency (RF) device 162, a baseband device 163, a processor 164, and a memory 165. The antenna 161 is connected to the RF device 162. In the uplink direction, the RF device 162 receives information through the antenna 161 and transmits the received information to the baseband device 163 for processing. In the downlink direction, the baseband device 163 processes the information to be transmitted and sends it to the RF device 162. The RF device 162 processes the received information and transmits it through the antenna 161.

[0387] The method executed by the network-side device in the above embodiments can be implemented in the baseband device 163, which includes a baseband processor.

[0388] Baseband device 163 may include, for example, at least one baseband board on which multiple chips are disposed, such as Figure 16 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 165 via a bus interface to call the program in the memory 165 and execute the network device operation shown in the above method embodiment.

[0389] The network-side device may also include a network interface 166, such as a Common Public Radio Interface (CPRI).

[0390] Specifically, the network-side device 1600 in this application embodiment further includes: instructions or programs stored in memory 165 and executable on processor 164, wherein processor 164 calls the instructions or programs in memory 165 to execute. Figure 13 The methods executed by each module shown achieve the same technical effect, and to avoid repetition, they will not be described in detail here.

[0391] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described CSI measurement method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0392] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk. In some examples, the readable storage medium may be a non-transient readable storage medium.

[0393] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described CSI measurement method embodiments and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0394] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0395] This application also provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-described CSI measurement method embodiments, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0396] This application also provides a CSI measurement system, including: a terminal and a network-side device, wherein the terminal can be used to perform the above-mentioned... Figure 2 The network-side device can be used to perform the steps of the CSI measurement method described above. Figure 3 The steps of the CSI measurement method described above.

[0397] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0398] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of computer software products plus necessary general-purpose hardware platforms, and of course, they can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions to cause the terminal or network-side device to execute the methods described in the various embodiments of this application.

[0399] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other implementations under the guidance of this application without departing from the spirit and scope of the claims. All of these implementations are within the protection scope of this application.

Claims

1. A CSI measurement method, characterized in that, Comprising: a terminal receives a first port set; the terminal performs channel state information (CSI) measurement according to a first resource, the first resource including at least part of resources corresponding to at least one first port pair in the first port set.

2. The method of claim 1, wherein, a first port in the first port set includes at least one of the following cases: a first case, all first ports in the first port set are used for demodulation and CSI measurement; a second case, all first ports in the first port set are used for demodulation, and part of the first ports are used for CSI measurement; a third case, part of the first ports in the first port set are used for demodulation, and all first ports are used for CSI measurement; a fourth case, all first ports in the first port set are only used for CSI measurement.

3. The method of claim 2, wherein, For at least one of the first case, the second case and the third case, the first resource satisfies at least one of the following: the first resource includes at least part of symbols occupied by the at least one first port; the first resource includes at least part of frequency domain resources occupied by the at least one first port; the first resource includes at least part of transmission occasions occupied by the at least one first port; in the first resource, at least part of the at least one first port each corresponds to a second resource for CSI measurement.

4. The method of claim 3, wherein, The first resource includes at least part of symbols occupied by the at least one first port, including at least one of the following: on one of the first ports, the symbols for CSI measurement are at least one additional symbol of the first port; on one of the first ports, the symbols for CSI measurement are the front symbols of the first port.

5. The method of claim 3, wherein, The first resource includes at least part of frequency domain resources occupied by the at least one first port, including at least one of the following: on one of the first ports, the frequency domain resources for CSI measurement are a subset of the frequency domain resources for demodulation; on one of the first ports, the frequency domain density for CSI measurement is 1 / M of the frequency domain density for demodulation, where M is a positive integer; on one of the first ports, the frequency domain resources for demodulation are a subset of the frequency domain resources for CSI measurement.

6. The method of claim 2, wherein, For X first ports only used for CSI measurement and Y first ports used for demodulation in the third case, where X and Y are positive integers, the first resource satisfies at least one of the following: in the first resource, the symbols occupied by the X first ports are a subset of the symbols occupied by the Y first ports; in the first resource, the frequency domain resources occupied by the X first ports are a subset of the frequency domain resources occupied by the Y first ports; in the first resource, the X first ports and the Y first ports occupy different frequency domain resources; in the first resource, the X first ports and the Y first ports occupy different symbols; in the first resource, the bandwidth of the X first ports is greater than or equal to the bandwidth of the Y first ports.

7. The method of claim 2, wherein, For the fourth case, the method further includes: The terminal receives a second port set, the second port set including a second port for demodulation, and the first port in the first port set is multiplexed with the second port in the second port set.

8. The method of claim 7, wherein, The first port in the first port set is multiplexed with the second port in the second port set, at least one of the following is met: The symbol occupied by the first port is a subset of the symbol occupied by the second port; The transmission occasion occupied by the first port is a subset of the transmission occasion occupied by the second port; The frequency domain resource occupied by the first port is a subset of the frequency domain resource occupied by the second port; The first port and the second port are frequency division multiplexed; In different transmission occasions, different first ports in the first port set are multiplexed with the second port; In the same resource block (RB), the frequency domain resource occupied by the first port is less than or equal to the frequency domain resource occupied by the second port; The bandwidth corresponding to the first port is greater than or equal to the bandwidth corresponding to the second port.

9. The method according to any one of claims 1 to 8, characterized in that, The first port in the first port set for CSI measurement only meets any of the following: No data stream transmission is associated on the first port for CSI measurement only; Data stream transmission is associated on the first port for CSI measurement only.

10. The method of claim 9, wherein, In the case that no data stream transmission is associated on the first port for CSI measurement only, at least one of the following is met: The transmission power of the first port or the second port for demodulation is less than or equal to the transmission power of the data stream associated on the first port or the second port for demodulation; The power factor or normalization factor of the corresponding precoding of the data stream is related to the data stream associated on the first port or the second port for demodulation; The power factor or normalization factor of the corresponding precoding of the first port for CSI measurement only is related to the number of the first port for CSI measurement only.

11. The method of claim 9, wherein, In the case that data stream transmission is associated on the first port for CSI measurement only, the data stream corresponds to a predefined transmission parameter, the transmission parameter includes at least one of the following: Modulation and coding scheme (MCS); Number of data streams; Diversity mode; Precoding matrix; Transmission power.

12. The method according to any one of claims 1 to 11, characterized in that, The first port for CSI measurement performs frequency hopping on different transmission symbols or transmission occasions, including at least one of the following: The first port for CSI measurement performs frequency hopping within a first bandwidth according to a predefined rule; The terminal performs joint CSI measurement on multiple transmission symbols or transmission occasions; The frequency hopping on different transmission symbols and the frequency hopping on different transmission occasions are separately enabled or simultaneously enabled.

13. A CSI measurement method, comprising: It includes: The network side device sends a first port set; Wherein, the first resource is used for the terminal to perform CSI measurement, and the first resource includes at least part of the resource corresponding to at least one first port in the first port set.

14. The method of claim 13, wherein, The first port in the first port set includes at least one of the following cases: The first port set is used for demodulation and CSI measurement. In a second case, all first ports in the first port set are used for demodulation, and part of the first ports are used for CSI measurement. In a third case, part of the first ports in the first port set are used for demodulation, and all the first ports are used for CSI measurement. In a fourth case, all the first ports in the first port set are used only for CSI measurement.

15. The method of claim 14, wherein, For at least one of the first case, the second case and the third case, the first resource satisfies at least one of the following conditions: The first resource includes at least part of the symbols occupied by the at least one first port. The first resource includes at least part of the frequency domain resources occupied by the at least one first port. The first resource includes at least part of the transmission occasions occupied by the at least one first port. In the first resource, at least part of the at least one first port each corresponds to a second resource for CSI measurement.

16. The method of claim 15, wherein, The first resource includes at least part of the symbols occupied by the at least one first port, including at least one of the following conditions: On one of the first ports, the symbols for CSI measurement are at least one additional symbol of the first port. On one of the first ports, the symbols for CSI measurement are the prepended symbols of the first port.

17. The method of claim 15, wherein, The first resource includes at least part of the frequency domain resources occupied by the at least one first port, including at least one of the following conditions: On one of the first ports, the frequency domain resources for CSI measurement are a subset of the frequency domain resources for demodulation. On one of the first ports, the frequency domain density for CSI measurement is 1 / M of the frequency domain density for demodulation, where M is a positive integer. On one of the first ports, the frequency domain resources for demodulation are a subset of the frequency domain resources for CSI measurement.

18. The method of claim 14, wherein, For X first ports used only for CSI measurement and Y first ports used for demodulation in the third case, where X and Y are positive integers, the first resource satisfies at least one of the following conditions: In the first resource, the symbols occupied by the X first ports are a subset of the symbols occupied by the Y first ports. In the first resource, the frequency domain resources occupied by the X first ports are a subset of the frequency domain resources occupied by the Y first ports. In the first resource, the X first ports and the Y first ports occupy different frequency domain resources. In the first resource, the X first ports and the Y first ports occupy different symbols. In the first resource, the bandwidth of the X first ports is greater than or equal to the bandwidth of the Y first ports.

19. The method of claim 14, wherein, For the fourth case, the method further includes: The network side device sends a second port set, which includes second ports used for demodulation, and the first ports in the first port set are multiplexed with the second ports in the second port set.

20. The method of claim 19, wherein, The multiplexing of the first ports in the first port set with the second ports in the second port set satisfies at least one of the following conditions: The symbols occupied by the first port are a subset of the symbols occupied by the second port; The transmission occasions occupied by the first port are a subset of the transmission occasions occupied by the second port; The frequency domain resources occupied by the first port are a subset of the frequency domain resources occupied by the second port; Frequency division multiplexing is performed between the first port and the second port; In different transmission occasions, different first ports in the first port set are multiplexed with the second port; Within the same RB, the frequency domain resources occupied by the first port are less than or equal to the frequency domain resources occupied by the second port; The bandwidth corresponding to the first port is greater than or equal to the bandwidth corresponding to the second port.

21. The method according to any one of claims 13 to 20, characterized in that, The first port in the first port set for CSI measurement only satisfies any one of the following conditions: No data stream transmission is associated on the first port for CSI measurement only; Data stream transmission is associated on the first port for CSI measurement only.

22. The method of claim 21, wherein, In the case where no data stream transmission is associated on the first port for CSI measurement only, at least one of the following conditions is satisfied: The transmission power of the first port or the second port for demodulation is less than or equal to the transmission power of the data stream associated on the first port or the second port for demodulation; The power factor or normalization factor of the corresponding precoding of the data stream is related to the data stream associated on the first port or the second port for demodulation; The power factor or normalization factor of the corresponding precoding of the first port for CSI measurement only is related to the number of the first port for CSI measurement only.

23. The method of claim 21, wherein, In the case where data stream transmission is associated on the first port for CSI measurement only, the data stream corresponds to a predefined transmission parameter, which includes at least one of the following: MCS; Number of data streams; Diversity mode; Precoding matrix; Transmission power.

24. The method according to any one of claims 13 to 23, characterized in that, The first port for CSI measurement performs frequency hopping on different transmission symbols or transmission occasions, including at least one of the following: The first port for CSI measurement performs frequency hopping within a first bandwidth according to a predefined rule; Multiple transmission symbols or transmission occasions are used for joint CSI measurement by the terminal; The frequency hopping on different transmission symbols and the frequency hopping on different transmission occasions are separately enabled or simultaneously enabled.

25. A CSI measurement apparatus, comprising: Comprise: A receiving module for receiving a first port set; A processing module for performing channel state information (CSI) measurement according to a first resource, the first resource including at least part of the resource corresponding to at least one first port in the first port set.

26. The apparatus of claim 25, wherein, The first port in the first port set includes at least one of the following conditions: In the first case, all first ports in the first port set are used for demodulation and CSI measurement; In the second case, all first ports in the first port set are used for demodulation, and part of the first ports are used for CSI measurement; In the third case, part of the first ports in the first port set are used for demodulation, and all first ports are used for CSI measurement; In the fourth case, all first ports in the first port set are used for CSI measurement only.

27. The apparatus of claim 26, wherein, For at least one of the first case, the second case and the third case, the first resource satisfies at least one of the following: The first resource comprises at least part of symbols occupied by the at least one first port; The first resource comprises at least part of frequency domain resources occupied by the at least one first port; The first resource comprises at least part of transmission occasions occupied by the at least one first port; In the first resource, at least part of the at least one first port each corresponds to different second resource, and the second resource is resource for CSI measurement.

28. The apparatus of claim 27, wherein, The first resource comprises at least part of symbols occupied by the at least one first port, comprising at least one of the following: On one of the first ports, the symbol for CSI measurement is at least one additional symbol of the first port; On one of the first ports, the symbol for CSI measurement is a prepended symbol of the first port.

29. The apparatus of claim 27, wherein, The first resource comprises at least part of frequency domain resources occupied by the at least one first port, comprising at least one of the following: On one of the first ports, the frequency domain resource for CSI measurement is a subset of frequency domain resource for demodulation; On one of the first ports, the frequency domain density for CSI measurement is 1 / M of the frequency domain density for demodulation, where M is a positive integer; On one of the first ports, the frequency domain resource for demodulation is a subset of the frequency domain resource for CSI measurement.

30. The apparatus of claim 26, wherein, For X first ports for CSI measurement only and Y first ports for demodulation in the third case, where X and Y are both positive integers, the first resource satisfies at least one of the following: In the first resource, the symbol occupied by the X first ports is a subset of the symbol occupied by the Y first ports; In the first resource, the frequency domain resource occupied by the X first ports is a subset of the frequency domain resource occupied by the Y first ports; In the first resource, the X first ports and the Y first ports occupy different frequency domain resources; In the first resource, the X first ports and the Y first ports occupy different symbols; In the first resource, the bandwidth of the X first ports is greater than or equal to the bandwidth of the Y first ports.

31. The apparatus of claim 26, wherein, For the fourth case, the receiving module is further configured to: receive a second port set, the second port set comprising a second port for demodulation, and a first port in the first port set is multiplexed with a second port in the second port set.

32. The apparatus of claim 31, wherein, The multiplexing of the first port in the first port set and the second port in the second port set satisfies at least one of the following: The symbol occupied by the first port is a subset of the symbol occupied by the second port; The transmission occasion occupied by the first port is a subset of the transmission occasion occupied by the second port; The frequency domain resource occupied by the first port is a subset of the frequency domain resource occupied by the second port; The first port and the second port are frequency division multiplexed; Different first ports in the first port set are multiplexed with the second port in different transmission occasions; In the same resource block (RB), the frequency domain resource occupied by the first port is less than or equal to the frequency domain resource occupied by the second port; The bandwidth corresponding to the first port is greater than or equal to the bandwidth corresponding to the second port.

33. The apparatus of any one of claims 25 to 32, wherein, The first port in the first port set for CSI measurement only satisfies any one of the following conditions: No data stream transmission is associated with the first port for CSI measurement only; Data stream transmission is associated with the first port for CSI measurement only.

34. The apparatus of claim 33, wherein, In the case where no data stream transmission is associated with the first port for CSI measurement only, at least one of the following conditions is satisfied: The transmission power of the first port or the second port for demodulation is less than or equal to the transmission power of the data stream associated with the first port or the second port for demodulation; The power factor or normalization factor of the corresponding precoding of the data stream is related to the data stream associated with the first port or the second port for demodulation; The power factor or normalization factor of the corresponding precoding of the first port for CSI measurement only is related to the number of the first port for CSI measurement only.

35. The apparatus of claim 33, wherein, In the case where data stream transmission is associated with the first port for CSI measurement only, the data stream corresponds to a predefined transmission parameter, which includes at least one of the following: Modulation and coding scheme (MCS); Number of data streams; Diversity mode; Precoding matrix; Transmission power.

36. The apparatus of any one of claims 25 to 35, wherein, The first port for CSI measurement performs frequency hopping on different transmission symbols or transmission occasions, including at least one of the following: The first port for CSI measurement performs frequency hopping within a first bandwidth according to a predefined rule; The terminal performs joint CSI measurement on multiple transmission symbols or transmission occasions; The frequency hopping on different transmission symbols and the frequency hopping on different transmission occasions are independently enabled or simultaneously enabled.

37. A CSI measurement apparatus, comprising: The method comprises the following steps: A sending module is configured to send a first port set. The first resource is used for the terminal to perform CSI measurement, and the first resource includes at least part of the resource corresponding to at least one first port in the first port set.

38. A terminal, characterized by The method comprises the following steps:

39. A network-side device, comprising: The method comprises the following steps:

40. A readable storage medium characterized by, The method comprises the following steps: The readable storage medium stores programs or instructions, which are executed by the processor to implement the steps of the method according to any one of claims 1 to 12, or to implement the steps of the method according to any one of claims 13 to 24.

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