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

Abstract

Embodiments of the present invention provide a method and apparatus for calculating channel quality information and a communication system. The apparatus is applied to terminal equipment, and the apparatus is a first receiver that receives a first channel state information reference signal resource setting from network equipment, wherein the first CSIRS resource setting includes at least a first resource set, the first resource set having K CSIRS resources, where K is a natural number of 2 or more; and a first processor that determines a channel quality indication based on at least M CSIRS resources, wherein the M CSIRS resources are related to the K CSIRS resources, where M is a natural number of K or less, and the calculation of the CQI is based on at least a assumed first physical downlink shared channel (PDSCH) signal, wherein the first PDSCH is transmitted at antenna ports [1000, ..., 1000+ν-1], and the first PDSCH is related to corresponding symbols transmitted at antenna ports [3000, ..., 3000+P-1].

Description

[Technical Field]

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

[0002] In the new radio (NR) system, the user can measure the current channel based on the channel state information (CSI) resource settings and CSI reporting settings configured on the network equipment side, and provide feedback by carrying the channel state information using uplink control information (UCI) on the uplink channels (e.g., physical uplink control channel PUCCH, physical uplink sharing channel PUSCH).

[0003] Multiple-transmission reception point (M-TRP) cooperative transmission schemes are a crucial technology for improving throughput for cell edge users and providing a more balanced quality of service to serving cells in NR systems. M-TRP transmission schemes can be broadly classified into two types: coherent joint transmission (C-JT) schemes and non-coherent joint transmission (NC-JT) schemes. The specific difference in their implementation lies in the mapping relationship from the layer to multiple TRPs. In the C-JT scheme, all physical downlink shared channel / demodulated reference signal (PDSCH / DMRS) ports that are jointly transmitted from multiple transmission points (TRPs) perform coherent transmission with signals from multiple TRPs, while in the NC-JT scheme, each PDSCH / DMRS port transmits from its respective TRP.

[0004] Figure 1 shows single-point transmission, coherent joint transmission, and non-coherent joint transmission. Figure 1A corresponds to single-point transmission, Figure 1B to C-JT transmission, and Figure 1C to NC-JT.

[0005] In Rel-15 / 16, all users report CSI based on a single-transmission reception point (S-TRP) scheme, which includes precoding matrix indicators (PMI), rank indicators (RI), layer indicators (LI), channel quality indicators (CQI), etc. Rel-17 supports enhanced CSI resource configuration and reporting for the NC-JT scheme, allowing terminal equipment to perform joint channel measurements based on reference signals transmitted by M transmission points based on NC-JT transmission, and report M PMIs, M RIs, M LIs, N CQIs (N=1 for single codewords, N=2 for dual codewords), etc. Currently, only CSI reporting under the 'type I single-panel' codebook configuration is supported.

[0006] In coherent joint transmission, each data layer is mapped to multiple TRPs / panels participating in coordination by a weighted vector, and this scheme is equivalent to concatenating multiple submatrices to form a higher-dimensional virtual matrix. Therefore, the C-JT transmission scheme can achieve higher forming / precoding / multiplexing gains and significantly improve the throughput of cell edge users and the average throughput of the cell.

[0007] The above-mentioned introduction of background art is intended to clearly and completely explain the proposed technical aspects of the present invention and to make them easily understandable to those skilled in the art. These technical aspects, as described in the background art of the present invention, should not be construed as being well-known to those skilled in the art. [Overview of the project] [Problems that the invention aims to solve]

[0008] According to the data / reference signal transmission and mapping characteristics in the CJT transmission scheme, terminal equipment must perform joint channel measurements based on reference signals transmitted by K multi-transmission points based on C-JT transmission, and also need to provide joint feedback of single CSI information such as PMI, RI, LI, and CQI.

[0009] However, currently, the CSI feedback mechanism in the Rel-15 to Rel-17 standards cannot be applied to CSI feedback in the C-JT transmission scheme. In other words, the CSI feedback from terminal equipment cannot accurately and completely reflect the real channel quality traversed by the C-JT resource port, which reduces the accuracy and reliability of data scheduling. This can lead to decreased data transmission performance and reduced throughput for both single users and the entire network.

[0010] In view of at least one of the above-mentioned problems or other similar problems, embodiments of the present invention provide a method and apparatus and a communication system for calculating channel quality information, which can accurately obtain channel quality information by establishing a mapping relationship between physical downlink shared channels (PDSCHs) and corresponding symbols to determine channel quality indications (CQIs), thereby improving data transmission performance and single-user and overall network throughput. [Means for solving the problem]

[0011] According to one aspect of the embodiments of the present invention, an apparatus for calculating channel quality information is provided, which is applied to terminal equipment, and the apparatus is A first receiver that receives a first channel status information reference signal (CSIRS) resource setting from a network device, wherein the first CSIRS resource setting includes at least a first resource set, and the first resource set includes K CSIRS resources, where K is a natural number greater than or equal to 2; and A first processor that determines a channel quality instruction (CQI) based on at least M CSIRS resources, wherein the M CSIRS resources include, with respect to the K CSIRS resources, M is a natural number less than or equal to K, Of these, the calculation of CQI is based at least on a assumed first physical downlink shared channel (PDSCH) signal, the first PDSCH being transmitted at antenna port [1000, ..., 1000+ν-1] and the corresponding symbols being transmitted at antenna port [3000, ..., 3000+P-1].

[0012] According to another aspect of the embodiment of the present invention, a method for calculating channel quality information is provided, which is applied to terminal equipment, and the method is The terminal device receives a first channel status information reference signal (CSIRS) resource setting from a network device, the first CSIRS resource setting includes at least a first resource set, the first resource set includes K CSIRS resources, where K is a natural number greater than or equal to 2; and The terminal device determines a Channel Quality Indicator (CQI) based on at least M CSIRS resources, and the M CSIRS resources are related to the K CSIRS resources, where M is a natural number less than or equal to K. Of these, the calculation of CQI is based at least on a assumed first physical downlink shared channel (PDSCH) signal, the first PDSCH being transmitted at antenna port [1000, ..., 1000+ν-1] and the corresponding symbols being transmitted at antenna port [3000, ..., 3000+P-1]. [Effects of the Invention]

[0013] The advantageous effects in the embodiments of the present invention are at least as follows. That is, by setting the mapping relationship between the physical downlink shared channel (PDSCH) and the corresponding symbol to determine the channel quality indicator (CQI), accurate acquisition of channel quality information can be achieved, so that the data transmission performance and the throughput of both a single user and the entire network can be improved.

[0014] Specific embodiments of the present invention will be disclosed in detail by referring to the following description and drawings, showing aspects in which the principles of the present invention can be adopted. It should be noted that the embodiments of the present invention are not limited in scope by these. Within the scope of the appended claims, the embodiments of the present invention may include various changes, modifications, and substitutions.

[0015] In addition, the features described and / or shown in one embodiment can be used in one or more other embodiments in the same or similar manner, combined with the features in other embodiments, or replace the features in other embodiments.

[0016] It should be noted that terms such as "comprising / having", when used in this specification, refer to the presence of features, elements, steps, or assemblies, but also refer to not excluding the presence or addition of one or more other features, elements, steps, or assemblies.

Brief Description of Drawings

[0017] The elements and features described in one drawing or one embodiment of the present invention can be combined with the elements and features shown in one or more other drawings or embodiments. Also, in the drawings, the same reference numerals indicate corresponding parts in several drawings and are also used to indicate corresponding parts used in multiple embodiments. [Figure 1] It is a diagram showing single-point transmission, coherent joint transmission, and non-coherent joint transmission. [Figure 2] It is a diagram showing a communication system according to the present invention. [Figure 3]This figure shows the first aspect of the present invention: a method for calculating channel quality information. [Figure 4] This figure shows the channel quality information calculation device, which is the second aspect of the present invention. [Figure 5] This diagram shows the terminal equipment in the third side embodiment. [Figure 6] This diagram shows the network equipment in the third-side embodiment. [Modes for carrying out the invention]

[0018] The aforementioned and other features of the present invention will become clear by referring to the attached drawings and the following description. While the specification and drawings disclose specific embodiments of the present invention, these represent only a limited number of embodiments in which the principles of the present invention can be employed. It should be understood that the present invention is not limited to the described embodiments, but rather includes all modifications, variations, and substitutions within the scope of the attached claims.

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

[0020] Furthermore, communication between devices in a communication system may be carried out according to any stage of communication protocol, and may include, but is not limited to, the following communication protocols: namely, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), and / or other current or future communication protocols.

[0021] In embodiments of the present invention, the term "network device" refers, for example, to a device in a communication system that connects terminal devices to a communication network and provides services to said terminal devices. Network devices may include, but are not limited to, the following: nodes and / or donors in an IAB architecture, base stations (BS), access points (AP), transmission and reception points (TRP), broadcast transmitters, mobile management entities (MME), network gateways, servers, radio network controllers (RNC), base station controllers (BSC), etc.

[0022] Base stations may include, but are not limited to, Node B (NodeB or NB), Evolutionary Node B (eNodeB or eNB), 5G base stations (gNB), and may also include RRH (Remote Radio Head), RRU (Remote Radio Unit), relay, or low-power nodes (e.g., femto, pico). The term “base station” may also include some or all of these functions, and each base station can provide communication coverage to a specific geographic area. The term “cell” may refer to a base station and / or the area it covers, which depends on the context in which the term is used.

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

[0024] User devices may include, but are not limited to, the following: cellular phones, PDAs (Personal Digital Assistants), wireless modems, wireless communication devices, mobile devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smartwatches, digital cameras, etc.

[0025] Furthermore, in scenarios such as IoT (Internet of Things), user devices may also be monitoring or measuring equipment or devices, and may include, but are not limited to, the following: machine-type communication (MTC) terminals, in-vehicle communication terminals, D2D (device-to-device) terminals, M2M (machine-to-machine) terminals, etc.

[0026] Furthermore, the terms “network side” or “network device side” refer to the network side, which may be a base station and may include one or more network devices as described above. The terms “user side” or “terminal side” or “terminal device side” refer to the user or terminal side, which may be a UE and may include one or more terminal devices as described above.

[0027] In the following explanation, unless to avoid confusion, the term “uplink control signal” is interchangeable with “uplink control information (UCI)” or “physical uplink control channel (PUCCH)”; the term “uplink data signal” is interchangeable with “uplink data information” or “physical uplink shared channel (PUSCH)”; the term “downlink control signal” is interchangeable with “downlink control information (DCI)” or “physical downlink control channel (PDCCH)”; and the term “downlink data signal” is interchangeable with “downlink data information” or “physical downlink shared channel (PDSCH)”.

[0028] Furthermore, the transmission or reception of PUSCH may be understood as the transmission or reception of uplink data carried by PUSCH, the transmission or reception of PUCCH may be understood as the transmission or reception of uplink information carried by PUCCH, the transmission or reception of PRACH may be understood as the transmission or reception of a preamble carried by PRACH, and uplink signals may include uplink data signals and / or uplink control signals, and may be referred to as uplink transmission (UL transmission), uplink information, or uplink channel. Transmitting an uplink transmission with an uplink resource may be understood as transmitting the uplink transmission using that uplink resource. Similarly, downlink data / signals / channels / information can be understood in the same way.

[0029] In embodiments of the present invention, the upper-layer signaling may be, for example, radio resource control (RRC) signaling, referred to as an RRC message, and may include, for example, a MIB, system information, a dedicated RRC message, or referred to as an RRC IE (RRC information element). The upper-layer signaling may further be, for example, MAC (Medium Access Control) signaling, or referred to as a MAC CE (MAC control element). However, the present invention is not limited thereto.

[0030] The following describes a scenario of an embodiment of the present invention through examples, but the present invention is not limited thereto.

[0031] Figure 2 shows a communication system in an embodiment of the present invention, illustrating an example with terminal equipment and network equipment. As shown in Figure 2, the communication system 100 may include network equipment 201 and terminal equipment 202. For convenience, Figure 1 uses only one terminal device as an example, but embodiments of the present invention are not limited to this.

[0032] In embodiments of the present invention, existing business (traffic / services) or future business that can be implemented may be transmitted and received between the network device 201 and the terminal device 202. For example, these business operations may include, but are not limited to, eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communication), URLLC (Ultra-Reliable and Low-Latency Communication), etc.

[0033] Among these, terminal device 202 may transmit data to network device 201, and may employ, for example, an authorized (licensed) or unauthorized (unlicensed) transmission method. Network device 201 may receive data transmitted by one or more terminal devices 202 and provide feedback to terminal device 202, such as acknowledgment (ACK) / non-acknowledgment (NACK) information, and terminal device 202 may, based on the feedback information, confirm the completion of the transmission process, or perform a new data transmission again, or retransmit the data.

[0034] In each embodiment of the present invention, "reporting" may refer to the act (operation) of a terminal device transmitting information to a network device. For example, "a terminal device reporting a CSI" may refer to the terminal device transmitting a CSI to a network device.

[0035] Current standardization explicitly supports the C-JT transmission scheme and enhanced CSI reporting based on C-JT. Specifically, terminal equipment can perform joint channel measurements based on a reference signal transmitted by K transmission points using C-JT transmission, and can jointly report single PMI, RI, LI, and N CQI (N=1 for single codewords, N=2 for dual codewords).

[0036] In the C-JT transmission scheme, terminal equipment can receive a single Channel State Information Reference Signal Resource (CSIRS) setting configured by network equipment, which contains K CSIRS resources. Each resource can be associated with a transmission point in a joint transmission, or terminal equipment can assume that K resources are transmitted by K transmission points. Therefore, terminal equipment can determine the channel state information for each transmission point in a C-JT joint transmission by measuring each CSIRS resource, and can also determine the channel state information in a C-JT joint transmission by performing joint calculations on the K resources. Furthermore, terminal equipment can select and report M optimal CSIRS resources based on the K CSIRS measurement results, for example, by reporting the selected resources using a log(K) bitmap.

[0037] The C-JT transmission scheme supports the calculation and joint feedback of precoding information based on K CSIRS resources, namely,

[0038]

number

[0039] In an NR system, terminal equipment can measure channel status based on the reception of non-zero power (NZP) CSIRS resources and provide feedback based on the reporting quantity setting in the reporting configuration. When the reporting quantity setting includes a Channel Quality Indication (CQI) setting, terminal equipment can jointly calculate and report CQI information based on the current channel estimation result and the CQI calculation assumptions in the standard. For example, the method by which terminal equipment calculates CQI is as follows: (1) The terminal device estimates the current channel H using CSIRS; (2) The terminal device calculates the optimal precoding information W based on the estimated channel H; (3) The terminal equipment calculates the current signal-to-interference noise ratio (SINR) based on the results of the pre-coded weighted channel; and (4) The terminal device performs the modulation order and SINR curve fitting based on the SINR calculation result, and calculates and reports the optimal CQI according to the CQI quantization definition in the standard.

[0040] CQI calculation is used to reflect channel quality information in the actual channel transmission of a physical downlink shared channel (PDSCH). Therefore, when calculating CQI, terminal equipment needs to map the PDSCH signal transmitted at the antenna ports [1000, ..., 1000+ν-1] that it receives to the related signal transmitted at the antenna ports [3000, ..., 3000+P-1] (the CSIRS signal is started to be transmitted at port 3000, and the related signal here refers to the CSIRS signal). For example, in NR systems, the mapping relationships shown in Table 1 are defined based on single-point transmission.

[0041] [Table 1] Eventually,

[0042]

number

[0043] According to Table 1, the channel state information calculated by CSIRS has a precoding mapping relationship with the actual PDSCH transmission port. Therefore, when terminal equipment calculates CQI, it is necessary to calculate the precoding information in advance, weight the precoding based on the current mapping relationship, and then calculate and feed back channel quality information, such as CQI, assuming a PDSCH transmission channel.

[0044] <Example of the first side view> According to the current CQI calculation assumptions, in the case of single-point-based transmission, only the mapping relationship between all ports of a single CSIRS resource and the PDSCH ports is defined, and the precoding information W is a single piece of information. However, in the C-JT transmission scheme, K transmission points each correspond to K CSIRS resources, and all ports of the PDSCH should correspond to all transmission points. Therefore, the current mapping relationship (for example, as shown in Table 1 above) does not adequately reflect the port correspondence relationship of the C-JT transmission scheme. Furthermore, when terminal equipment feeds back joint precoding information from multiple transmission points, following the current mapping relationship makes the correspondence of W unclear, which can lead to errors in the CQI calculation assumptions.

[0045] Based on the above, under the current CQI calculation assumptions, the CQI information calculated by terminal equipment based on conventional technology cannot accurately and completely reflect the actual channel quality traversed by the C-JT resource port. This may lead to a decrease in the accuracy and reliability of data scheduling, and potentially reduce data transmission performance and throughput for single users and the entire network.

[0046] To solve the above-mentioned problems or at least similar problems, a method for calculating channel quality information is provided in an embodiment of the first aspect of the present invention, which is applied to terminal equipment. In the following description, the terminal equipment may be, for example, terminal equipment 202 in Figure 2, and the network equipment communicating with the terminal equipment may be, for example, network equipment 201 in Figure 2.

[0047] Figure 3 shows a method for calculating channel quality information in an embodiment of the first aspect of the present invention. As shown in Figure 3, the method includes the following: Operation 301: A terminal device receives a first channel status information reference signal (CSIRS) resource setting from a network device, the first CSIRS resource setting includes at least a first resource set, the first resource set has K CSIRS resources, where K is a natural number greater than or equal to 2; and Operation 302: A terminal device determines a Channel Quality Indicator (CQI) based on at least M CSIRS resources, where M CSIRS resources are relative to K CSIRS resources, and M is a natural number less than or equal to K.

[0048] In operation 302, the CQI calculation is performed based on at least a assumed first physical downlink shared channel (PDSCH) signal, the first PDSCH transmitted at antenna port [1000, ..., 1000+ν-1], and the first PDSCH relating to the corresponding symbols transmitted at antenna port [3000, ..., 3000+P-1].

[0049] In some embodiments, the relationship between the first PDSCH and the corresponding symbol can be expressed, for example, as shown in equation (1) below.

[0050]

number

[0051]

number

[0052]

number

[0053]

number

[0054] In some other embodiments, the relationship between the first PDSCH and the corresponding symbol can be expressed, for example, as shown in equation (2) below.

[0055]

number

[0056]

number

[0057]

number

[0058]

number

[0059] In equation (2), [r0...r k-1 ] TThis is used to determine the correlation between M CSIRS resources and the aforementioned K CSIRS resources, for example, [r0...r k-1 ] T This corresponds to a bitmap having K bits. The terminal device determines and reports the selection result of the M CSIRS resources based on the information in the bitmap.

[0060] In some embodiments, the M CSIRS resources related to operation 302 relating to K CSIRS resources includes the following: namely, the M CSIRS resources are M of the K CSIRS resources. For example, the M CSIRS resources are the optimal M CSIRS resources from the K CSIRS resources.

[0061] Of these K CSIRS resources, the optimal M CSIRS resources may include the following, namely, The first number of resources prior to the maximum reference signal receiving power (RSRP), where the first number is M or less; and / or RSRP is a second number of resources that are greater than or equal to a predetermined threshold, and the second number is less than or equal to M; and / or The third number of resources prior to the minimum block error rate (BLER), where the third number is M or less; and / or BLER is a fourth number of resources that are below a predetermined threshold, and this fourth number is less than or equal to M.

[0062] In some embodiments, of the M CSIRS resources and / or K CSIRS resources, each CSIRS resource is transmitted via antenna ports [3000, ..., 3000 + P - 1], where P is the number of antenna ports for each CSIRS resource.

[0063] In some embodiments, the terminal equipment transmits data in the time domain and frequency domain in complete superposition at antenna ports [3000, ..., 3000 + P - 1] based on the M CSIRS resources and / or the K CSIRS resources, where P is the number of antenna ports for each CSIRS resource.

[0064] The method for calculating channel quality information according to the present invention will be explained below, along with specific examples.

[0065] Example 1: In Example 1, the method for calculating channel quality information includes the following operations:

[0066] Operation 1: The network device configures the Multipoint Joint Coherent Transmission (C-JT) scheme and CSI reporting settings for the terminal device via upper-layer signaling. The network device may also add new upper-layer signaling to configure CSI resource settings. This allows the terminal device to receive and measure CSI-RS resources based on CJT transmission.

[0067] Among these, the CSI resource configuration includes a Non-Zero Power Channel State Information Reference Signal (NZP-CSI-RS) resource set for channel measurement, and this NZP-CSI-RS resource set (i.e., the first resource set) has K CSI-RS resources, each resource containing P ports. For example, K=4 and P=16.

[0068] Operation 2: The terminal device measures channel information such as large-scale RSRP and selects the 1st, 2nd, and 4th resources out of the K CSIRS resources, determining them as the optimal M (M=3) CSIRS resources, thereby confirming the selection result of the M CSIRS resources. In the C-JT transmission scheme, the CSI-RS resource selection report result is 1101, meaning that the number of bits in the report result 1101 is K (K=4), and the 1st, 2nd, and 4th bits of the report result are set to 1, which indicates that the 1st, 2nd, and 4th resources out of the K (K=4) CSIRS resources are selected (i.e., M=3). The terminal obtains the optimal joint transmission RI=2 by calculating with the selected 1st, 2nd, and 4th CSIRS resources.

[0069] Operation 3: Calculate the optimal precoding W for joint transmission using the selected 1st, 2nd, and 4th CSI-RS resources, and report in PMI that the dimension of the precoding matrix calculated by resource selection is M (M=3), so W can be expressed as follows:

[0070]

number

[0071] In operation 3, each terminal device weights the precoding information for the PDSCH port according to the following mapping relationship (i.e., performs a weighting operation on the precoding information):

[0072]

number

[0073]

number

[0074]

number

[0075]

number

[0076] Example 2: In Example 2, the method for calculating channel quality information includes the following operations:

[0077] Operation 1: The network device configures the Multipoint Joint Coherent Transmission (C-JT) scheme and CSI reporting settings for the terminal device via upper-layer signaling. The network device may also add new upper-layer signaling to configure CSI resource settings. This allows the terminal device to receive and measure CSI-RS resources based on CJT transmission.

[0078] Among these, the CSI resource configuration includes a Non-Zero Power Channel State Information Reference Signal (NZP-CSI-RS) resource set for channel measurement, and this NZP-CSI-RS resource set (i.e., the first resource set) contains K CSI-RS resources, each resource containing P ports. For example, K=4 and P=16.

[0079] Operation 2: The terminal device measures channel information such as large-scale RSRP and selects the 1st, 2nd, and 4th resources out of the K CSI-RS resources, determining them as the optimal M (M=3) CSI-RS resources, thereby confirming the selection result of the M CSI-RS resources. In the C-JT transmission scheme, the CSIRS resource selection report result is 1101, meaning that the number of bits in the report result 1101 is K (K=4), and the 1st, 2nd, and 4th bits of the report result are set to 1, which indicates that the 1st, 2nd, and 4th resources out of the K (K=4) CSI-RS resources have been selected (i.e., M=3). The optimal joint transmission RI=2 is obtained by calculating based on the selected 1st, 2nd, and 4th CSI-RS resources.

[0080] Operation 3: Calculate the optimal precoding W for joint transmission using the selected 1st, 2nd, and 4th CSI-RS resources, and report in PMI that the dimension of the precoding matrix calculated by resource selection is M, so W can be expressed as follows:

[0081]

number

[0082] In operation 3, the terminal device weights the precoding information for each PDSCH port according to the following mapping relationship.

[0083] [Number] Among them,

[0084] [Number] represents the signal vectors of two layers of PDSCH and corresponds to the reported RI = 2; [r0…r k-1 T is used to determine the correlation between the M CSI-RS resources and the K CSI-RS resources. In some embodiments, [r0…r k-1 T is a bitmap having K bits. For example, [r0…r k-1 T is the CSI-RS resource selection report result 1101 in operation 2, that is, [r0…r k-1 T is

[1101] T and so on.

[0085] [Number] ​​​is the signal transmitted at the antenna port [3000, ..., 3000+16-1], and for the (j+1)th CSIRS signal in the CSIRS resource set (i.e., the first resource set) in operation 2, j+1 is a non-negative integer that is greater than or equal to 0 and less than or equal to K-1. Thus, the above equation can take the following form:

[0086]

number

[0087] An embodiment of the first aspect of the present invention provides a method for calculating channel quality information, which can be accurately obtained by establishing a mapping relationship between physical downlink shared channels (PDSCHs) and corresponding symbols to determine channel quality indicators (CQIs), thereby improving data transmission performance and single-user and overall network throughput.

[0088] <Example of the second aspect> In addition to addressing at least the same problems as in the first embodiment, a second embodiment of the present invention provides an apparatus for calculating channel quality information, which is applied to terminal equipment and corresponds to the first embodiment.

[0089] Figure 4 shows an apparatus for calculating channel quality information in the second embodiment. As shown in Figure 4, the apparatus 400 for calculating channel quality information includes a first receiver 401, a first processor 402, and a first transmitter 403.

[0090] In some embodiments, the first receiver 401 receives a first channel status information reference signal (CSIRS) resource setting from a network device, the first CSIRS resource setting includes at least a first resource set, the first resource set has K CSIRS resources, where K is a natural number greater than or equal to 2.

[0091] The first processor 402 determines the channel quality instruction (CQI) based on at least M CSIRS resources, where M is a natural number less than or equal to K, and the M CSIRS resources are related to the K CSIRS resources.

[0092] Of these, the calculation of CQI is based at least on a assumed first physical downlink shared channel (PDSCH) signal, the first PDSCH being transmitted at antenna port [1000, ..., 1000+ν-1] and the corresponding symbols being transmitted at antenna port [3000, ..., 3000+P-1].

[0093] In some embodiments, the relationship between the first PDSCH and the corresponding symbol is as follows:

[0094]

number

[0095] Eventually,

[0096]

number

[0097]

number

[0098]

number

[0099] In some other embodiments, the relationship between the first PDSCH and the corresponding symbol is as follows:

[0100]

number

[0101] Eventually,

[0102]

number

[0103]

number

[0104]

number

[0105] In some embodiments, the [r0...r k-1 ] T This is used to determine the correlation between the M CSIRS resources and the K CSIRS resources.

[0106] In some embodiments, the first processor 402 determines the selection result of the M CSIRS resources based on a bitmap having K bits, and the first transmitter reports the selection result.

[0107] In some embodiments, the M CSIRS resources relating to the K CSIRS resources includes the following: The aforementioned M CSIRS resources are M of the K CSIRS resources.

[0108] In some embodiments, the M CSIRS resources are the following of the K CSIRS resources, namely, The first number of resources prior to the maximum reference signal receiving power (RSRP), where the first number is less than or equal to M; and / or RSRP is a second number of resources greater than or equal to a predetermined threshold, and the second number is less than or equal to M; and / or The third number of resources prior to the minimum block error rate (BLER), where the third number is M or less; and / or BLER is a fourth number of resources that are less than or equal to a predetermined threshold, and the fourth number is less than or equal to M.

[0109] In some embodiments, of the M CSIRS resources and / or K CSIRS resources, each CSIRS resource is transmitted via antenna ports [3000, ..., 3000 + P - 1], where P is the number of antenna ports for each CSIRS resource.

[0110] In some embodiments, the terminal device transmits data in complete superposition in the time domain and frequency domain via antenna ports [3000, ..., 3000 + P - 1] based on the M CSIRS resources and / or K CSIRS resources, where P is the number of antenna ports for each CSIRS resource.

[0111] <Example of the third side> A third embodiment of the present invention provides a communication system, which may include network equipment and terminal equipment.

[0112] Figure 5 shows a terminal device in an embodiment of the third side. As shown in Figure 5, the terminal device 500 (for example, corresponding to terminal device 202 in Figure 2) may include a processor 510 and a memory 520, the memory 520 storing data and programs and connected to the processor 510. Note that this figure is merely illustrative, and telecommunications functions or other functions may be realized by supplementing or substituting this structure with other types of structures.

[0113] For example, the processor 510 may be configured to execute a program to implement the method in the first embodiment.

[0114] As shown in Figure 5, the terminal device 500 may further include a communication module 530, an input unit 540, a display 550, a power supply 560, and the like. Of these, the functions of the above-mentioned components are the same as in the prior art, and a detailed explanation is omitted here. Note that the terminal device 500 does not need to include all the components shown in Figure 5. Furthermore, the terminal device 500 may also include components not shown in Figure 5, for which prior art can be referenced.

[0115] Figure 6 shows the network equipment in the third-sided embodiment. As shown in Figure 6, the network equipment 600 (for example, corresponding to the network equipment 201 in Figure 2) may include a processor 610 (for example, a central processor CPU) and a memory 620, the memory 620 being connected to the processor 66. The memory 620 can store various types of data, as well as a program 630 for information processing, and can execute the program 630 under the control of the processor 66.

[0116] For example, the processor 610 may be configured to execute a program to perform operations on network devices as described in the embodiment of the first aspect.

[0117] Furthermore, as shown in Figure 6, the network device 600 may also include a transceiver 640, an antenna 650, etc., and the functions of the above-mentioned components are the same as in the prior art, so a detailed explanation is omitted here. Note that the network device 600 does not need to include all the components shown in Figure 6. Also, the network device 600 may include components not shown in Figure 6, for which prior art can be referred.

[0118] In this embodiment of the present invention, a computer program is further provided, in which, when the program is executed on a terminal device, the program causes the terminal device to perform the method described in the first embodiment.

[0119] In the embodiments of the present invention, a storage medium storing a computer program is further provided, wherein the computer program causes a terminal device to execute the method described in the embodiment of the first aspect.

[0120] Furthermore, the above-described apparatus and method may be implemented by software or hardware, or by a combination of hardware and software. The present invention also relates to a computer-readable program, such as the following, which, when executed by a logic component, causes the logic component to implement the above-described apparatus or component, or to the logic component to implement each of the above-described methods or steps. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, or a processor used in a computer. The present invention also relates to a storage medium storing the above-described program, such as a hard disk, magnetic disk, optical hard disk, DVD, or flash memory.

[0121] Furthermore, one or more combinations of the functional blocks shown in the drawings and / or one or more combinations of functional blocks may be implemented as a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic component, discrete gate or transistor logic component, discrete hardware assembly or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks shown in the drawings and / or one or more combinations of functional blocks may further be configured as a combination of computing devices, for example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors connected to a DSP by communication or any other combination of any other configuration.

[0122] Although preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and any modifications to the present invention that do not deviate from the spirit of the invention fall within the technical scope of the present invention.

[0123] Furthermore, the following additional information is disclosed regarding the above-mentioned embodiments.

[0124] <Method on the terminal device side> (Note 1) A method for calculating channel quality information, which is applied to terminal equipment, and the method is The terminal device receives a first channel status information reference signal (CSIRS) resource setting from a network device, the first CSIRS resource setting includes at least a first resource set, the first resource set has K CSIRS resources, where K is a natural number greater than or equal to 2; and The terminal device determines a Channel Quality Indicator (CQI) based on at least M CSIRS resources, and the M CSIRS resources are related to the K CSIRS resources, where M is a natural number less than or equal to K. Of these, the calculation of CQI is based at least on a assumed first physical downlink shared channel (PDSCH) signal, the first PDSCH being transmitted at antenna port [1000, ..., 1000+ν-1] and the corresponding symbols being transmitted at antenna port [3000, ..., 3000+P-1].

[0125] (Note 2) The method described in Appendix 1, The relationship between the first PDSCH and the corresponding symbol is as follows:

[0126]

number

[0127]

number

[0128]

number

[0129]

number

[0130] (Note 3) The method described in Appendix 1, The relationship between the first PDSCH and the corresponding symbol is as follows:

[0131]

number

[0132]

number

[0133]

number

[0134]

number

[0135] (Note 4) The method described in Appendix 3, The aforementioned [r0...r k-1 ] T This is used to determine the correlation between the M CSIRS resources and the K CSIRS resources.

[0136] (Note 5) The method described in Appendix 4, The terminal device determines and reports the selection result of the M CSIRS resources based on a bitmap having K bits.

[0137] (Note 6) A method described in any one of the appendices 1 to 5, The fact that the M CSIRS resources relate to the K CSIRS resources is, The M CSIRS resources are M of the K CSIRS resources.

[0138] (Note 7) The method described in Appendix 6, The aforementioned M CSIRS resources are among the aforementioned K CSIRS resources, The first number of resources prior to the maximum reference signal receiving power (RSRP), where the first number is less than or equal to M; and / or RSRP is a second number of resources greater than or equal to a predetermined threshold, and the second number is less than or equal to M; and / or The third number of resources prior to the minimum block error rate (BLER), where the third number is M or less; and / or A system in which BLER is a fourth number of resources that are less than or equal to a predetermined threshold, and the fourth number is less than or equal to M.

[0139] (Note 8) A method described in any one of the appendices 1 to 7, Of the M CSIRS resources and / or K CSIRS resources, each CSIRS resource is transmitted via antenna ports [3000, ..., 3000 + P - 1], where P is the number of antenna ports for each CSIRS resource.

[0140] (Note 9) A method described in any one of the appendices 1 to 7, The terminal device transmits data in complete superposition in the time domain and frequency domain via antenna ports [3000, ..., 3000 + P - 1] based on the M CSIRS resources and / or K CSIRS resources, where P is the number of antenna ports for each CSIRS resource.

Claims

1. A device for calculating channel quality information, which is applied to terminal equipment, and the device is A first receiver that receives a first channel status information reference signal (CSIRS) resource setting from a network device, wherein the first CSIRS resource setting includes at least a first resource set, and the first resource set has K CSIRS resources, where K is a natural number greater than or equal to 2; and A first processor that determines a channel quality instruction (CQI) based on at least M CSIRS resources, wherein the M CSIRS resources include, with respect to the K CSIRS resources, M is a natural number less than or equal to K. The device for calculating the CQI is based at least on a assumed first physical downlink shared channel (PDSCH) signal, wherein the first PDSCH is transmitted at antenna ports [1000, ..., 1000+ν-1] and the first PDSCH is transmitted at antenna ports [3000, ..., 3000+P-1] and the corresponding symbols are.

2. The apparatus according to claim 1, The relationship between the first PDSCH and the corresponding symbol is as follows: [Math 1] And, [Math 2] This represents the signal vectors of the v layers of the first PDSCH, [Math 3] This is a signal transmitted at the antenna ports [3000, ..., 3000+P-1], and relates to the k_j+1th CSIRS signal in the first resource set, [Math 4] The device is a precoding matrix to which the PMI is applied, reported based on the M CSIRS resources.

3. The apparatus according to claim 1, The relationship between the first PDSCH and the corresponding symbol is as follows: [Math 5] And, [Math 6] This represents the signal vectors of the v layers of the first PDSCH, [Number 7] This is a signal transmitted at the antenna ports [3000, ..., 3000+P-1], and relates to the (j+1)th CSIRS signal in the first resource set, [Number 8] The device is a precoding matrix to which the PMI is applied, reported based on the M CSIRS resources.

4. The apparatus according to claim 3, The aforementioned [r ０ ...r ｋ－１ ] Ｔ This is a device used to determine the correlation between the M CSIRS resources and the K CSIRS resources.

5. The apparatus according to claim 4, The apparatus wherein the first process determines the selection result of the M CSIRS resources based on a bitmap having K bits, and reports the selection result by a first transmitter.

6. The apparatus according to claim 1, The fact that the M CSIRS resources relate to the K CSIRS resources is, An apparatus comprising the condition that the M CSIRS resources are M of the K CSIRS resources.

7. The apparatus according to claim 6, The M CSIRS resources are among the K CSIRS resources, The first number of resources prior to the maximum reference signal receiving power (RSRP), wherein the first number is less than or equal to M; and / or RSRP is a second number of resources that are equal to or greater than a predetermined threshold, and the second number is less than or equal to M; and / or The third number of resources prior to the minimum block error rate (BLER), where the third number is M or less; and / or A device in which BLER is a fourth number of resources less than or equal to a predetermined threshold, and the fourth number is less than or equal to M.

8. The apparatus according to claim 1, A device in which, of the M CSIRS resources and / or K CSIRS resources, each CSIRS resource is transmitted via antenna ports [3000, ..., 3000 + P - 1], where P is the number of antenna ports for each CSIRS resource.

9. The apparatus according to claim 1, The terminal device transmits signals in complete superposition in the time domain and frequency domain via antenna ports [3000, ..., 3000 + P - 1] based on the M CSIRS resources and / or K CSIRS resources, where P is the number of antenna ports for each CSIRS resource.

10. It is a communication system, Including network equipment and terminal equipment, A communication system comprising the terminal equipment described in claim 1.

11. A method for calculating channel quality information, which is applied to terminal equipment, and the method is The terminal device receives a first channel status information reference signal (CSIRS) resource setting from a network device, wherein the first CSIRS resource setting includes at least a first resource set, the first resource set has K CSIRS resources, and K is a natural number greater than or equal to 2; and The terminal device determines a channel quality instruction (CQI) based on at least M CSIRS resources, wherein the M CSIRS resources are relative to the K CSIRS resources, and M is a natural number less than or equal to K. A method for calculating the CQI, relating at least to a corresponding symbol transmitted at antenna ports [1000, ..., 1000+ν-1], based on a assumed first physical downlink shared channel (PDSCH) signal, wherein the first PDSCH is transmitted at antenna ports [3000, ..., 3000+P-1].

12. The method according to claim 11, The relationship between the first PDSCH and the corresponding symbol is as follows: [Number 9] And, [Number 10] This represents the signal vectors of the v layers of the first PDSCH, [Math 11] This is a signal transmitted at the antenna ports [3000, ..., 3000+P-1], and relates to the k_j+1th CSIRS signal in the first resource set, [Math 12] A method in which PMI is applied to x(i) based on the aforementioned M CSIRS resources, which is a precoding matrix.

13. The method according to claim 11, The relationship between the first PDSCH and the corresponding symbol is as follows: [Number 13] And, [Number 14] This represents the signal vector of the v layers of the first PDSCH, [Number 15] This is a signal transmitted at the antenna ports [3000, ..., 3000+P-1], and relates to the (j+1)th CSIRS signal in the first resource set, [Number 16] A method in which PMI is applied to x(i) based on the aforementioned M CSIRS resources, which is a precoding matrix.

14. The method according to claim 13, The aforementioned [r ０ ...r ｋ－１ ] Ｔ A method used to determine the correlation between the M CSIRS resources and the K CSIRS resources.

15. The method according to claim 14, A method for determining and reporting the selection result of the M CSIRS resources based on a bitmap having K bits, wherein the terminal device determines the selection result.

16. The method according to claim 11, The fact that the M CSIRS resources relate to the K CSIRS resources is, A method comprising the condition that the M CSIRS resources are M of the K CSIRS resources.

17. The method according to claim 16, The M CSIRS resources are among the K CSIRS resources, The first number of resources prior to the maximum reference signal receiving power (RSRP), wherein the first number is less than or equal to M; and / or RSRP is a second number of resources that are equal to or greater than a predetermined threshold, and the second number is less than or equal to M; and / or The third number of resources prior to the minimum block error rate (BLER), where the third number is M or less; and / or A method wherein BLER is a fourth number of resources less than or equal to a predetermined threshold, and the fourth number is less than or equal to M.

18. The method according to claim 11, A method in which, of the M CSIRS resources and / or K CSIRS resources, each CSIRS resource is transmitted via antenna ports [3000, ..., 3000 + P - 1], where P is the number of antenna ports for each CSIRS resource.

19. The method according to claim 11, The terminal device transmits the M CSIRS resources and / or K CSIRS resources in complete superposition in the time domain and frequency domain via antenna ports [3000, ..., 3000 + P - 1], where P is the number of antenna ports for each CSIRS resource, in this method.

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