CN117978217A

CN117978217A - Information indication method, device, terminal, network equipment and readable storage medium

Info

Publication number: CN117978217A
Application number: CN202211287942.3A
Authority: CN
Inventors: 塔玛拉卡·拉盖施; 孙荣荣
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2024-05-03
Also published as: WO2024083101A1

Abstract

The application discloses an information indication method, an information indication device, a terminal, network side equipment and a readable storage medium, which belong to the technical field of communication, and the information indication method in the embodiment of the application comprises the following steps: the method comprises the steps that network side equipment sends downlink control information DCI to a terminal, wherein the DCI comprises n Transmission Precoding Matrix Indication (TPMI) domains, each precoding matrix indicated by each TPMI domain corresponds to a codebook subset, the codebook subset comprises precoding matrixes corresponding to partial transmission ranks, and n is greater than or equal to 2.

Description

Information indication method, device, terminal, network equipment and readable storage medium

Technical Field

The application belongs to the technical field of communication, and particularly relates to an information indication method, an information indication device, a terminal, network side equipment and a readable storage medium.

Background

Under the transmission of the uplink 8 antennas, the terminal has partial coherence capability, that is, phase continuity can be maintained between one group of transmitting antennas in the uplink transmission of the terminal, and phase continuity can also be maintained between the other group of transmitting antennas, but phase continuity cannot be maintained between the transmitting antenna groups. In the partially coherent antenna, at least two transmission precoding matrix indication (Transmit precoding matrix indicator, TPMI) fields are required to be used in downlink control information (Downlink Control Information, DCI), and the size of each TPMI field is related to the number of precoding matrices corresponding to all transmission ranks, which will cause a large DCI overhead.

Disclosure of Invention

The embodiment of the application provides an information indication method, an information indication device, a terminal, network side equipment and a readable storage medium, which can solve the problem of high DCI (downlink control information) overhead caused by the existing precoding matrix indication mode.

In a first aspect, an information indication method is provided, including:

the network side equipment sends DCI to a terminal, wherein the DCI comprises n TPMI domains, each precoding matrix indicated by each TPMI domain corresponds to a codebook subset, the codebook subset comprises precoding matrixes corresponding to partial transmission ranks, and n is more than or equal to 2.

In a second aspect, there is provided an information indicating method, including:

The terminal receives DCI from network side equipment, wherein the DCI comprises n TPMI domains, each precoding matrix indicated by each TPMI domain corresponds to a codebook subset, the codebook subset comprises precoding matrices corresponding to partial transmission ranks, and n is more than or equal to 2.

In a third aspect, an information indicating apparatus is provided, which is applied to a network side device, and includes:

A sending module, configured to send DCI to a terminal, where the DCI includes n TPMI domains, each of precoding matrices indicated by the TPMI domains corresponds to a codebook subset, where the codebook subset includes precoding matrices corresponding to a part of transmission ranks, and n is greater than or equal to 2.

In a fourth aspect, an information indicating apparatus is provided, which is applied to a terminal, and includes:

A receiving module, configured to receive DCI from a network side device, where the DCI includes n TPMI domains, each of precoding matrices indicated by the TPMI domains corresponds to a codebook subset, and the codebook subset includes precoding matrices corresponding to a part of transmission ranks, and n is greater than or equal to 2.

In a fifth aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which program or instructions when executed by the processor implement the steps of the method as described in the first aspect.

In a sixth aspect, a network side device is provided, including a processor and a communication interface, where the communication interface is configured to send DCI to a terminal, where the DCI includes n TPMI domains, each of precoding matrices indicated by the TPMI domains corresponds to a subset of codebooks, where the subset of codebooks includes precoding matrices corresponding to a part of transmission ranks, and n is greater than or equal to 2.

In a seventh aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the second aspect.

In an eighth aspect, a terminal is provided, including a processor and a communication interface, where the communication interface is configured to receive DCI from a network side device, where the DCI includes n TPMI domains, each of precoding matrices indicated by the TPMI domains corresponds to a subset of codebooks, where the subset of codebooks includes precoding matrices corresponding to a partial transmission rank, and n is greater than or equal to 2.

In a ninth aspect, there is provided a communication system comprising: a terminal and a network side device, where the network side device is configured to perform the steps of the information indication method according to the first aspect, and the terminal is configured to perform the steps of the information indication method according to the second aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect or performs the steps of the method according to the second aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions, implementing the steps of the method according to the first aspect, or implementing the steps of the method according to the second aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being 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.

In the embodiment of the application, by introducing the codebook subset, wherein the codebook subset comprises the precoding matrix corresponding to part of transmission ranks, and the precoding matrix indicated by each TPMI domain in the DCI sent to the terminal corresponds to one codebook subset, the size of the TPMI domain in the DCI can be made to depend on the size of the corresponding codebook subset, and the size of the TPMI domain does not need to be related to the number of the precoding matrices corresponding to all transmission ranks, so that the cost of control signaling DCI is saved.

Drawings

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

FIG. 2 is a flowchart of an information indication method according to an embodiment of the present application;

FIG. 3 is a flowchart of an information indication method according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an information indicating device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another information indicating device according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 7is a schematic structural diagram of a terminal according to an embodiment of the present application;

Fig. 8 is a schematic structural diagram of a network side device according to an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier Frequency Division Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New Radio (NR) system for exemplary purposes and NR terminology is used in much of the following description, but these techniques may also be applied to applications other than NR system applications, such as 6 th Generation (6G) communication systems.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a Mobile phone, a tablet Computer (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side device called a notebook, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a palm Computer, a netbook, an ultra-Mobile Personal Computer (ultra-Mobile Personal Computer, UMPC), a Mobile internet appliance (Mobile INTERNET DEVICE, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) device, a robot, a wearable device (Wearable Device), a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (home device with a wireless communication function, such as a refrigerator, a television, a washing machine, a furniture, etc.), a game machine, a Personal Computer (Personal Computer, a PC), a teller machine, or a self-service machine, etc., and the wearable device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may include an access network device or a core network device, where the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function, or a radio access network element. Access network device 12 may include a base station, a WLAN access Point, a WiFi node, or the like, which may be referred to as a node B, an evolved node B (eNB), an access Point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a Basic service set (Basic SERVICE SET, BSS), an Extended service set (Extended SERVICE SET, ESS), a home node B, a home evolved node B, a transmission and reception Point (TRANSMITTING RECEIVING Point, TRP), or some other suitable terminology in the art, and the base station is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited.

In order to facilitate understanding of the embodiments of the present application, the following problems are first described.

For uplink 8-antenna transmission, a maximum of 8-layer data simultaneous transmission can be supported. In case that the number of transmission layers is greater than 4, single codeword (one Transport Block (TB)), and/or double codeword (two TBs) transmission may be supported. If only single codeword transmission is supported, the precoding indication may be one transmission precoding matrix indication (Transmit precoding matrix indicator, TPMI) field or two TPMI field indications.

The 4-antenna codebooks corresponding to different transmission ranks (Rank) may be as shown in tables 1 to 4 below. Table 1 shows a precoding matrix W of a single layer transmission (i.e., rank=1) using four antenna ports in the case where transform precoding is disabled.

TABLE 1

Table 2 shows a precoding matrix W of a dual layer transmission (i.e., rank=2) using four antenna ports in the case where transform precoding is disabled.

TABLE 2

Table 3 shows a precoding matrix W for a three-layer transmission (i.e., rank=3) using four antenna ports with transform precoding disabled.

TABLE 3 Table 3

Table 4 shows a precoding matrix W for a four layer transmission (i.e., rank=4) using four antenna ports with transform precoding disabled.

TABLE 4 Table 4

In the embodiment of the present application, the transmission rank (rank) may be understood as any transmission layer (layer) indicated by the TPMI domain. The transmission rank may also be referred to as rank, and may be equal to 1,2,3,4, etc.

The information indicating method, the device, the terminal, the network side equipment and the readable storage medium provided by the embodiment of the application are described in detail below through some embodiments and application scenes thereof with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart of an information indication method provided in an embodiment of the present application, where the method is performed by a network side device, and as shown in fig. 2, the method includes the following steps:

Step 21: the network side equipment sends DCI to a terminal, wherein the DCI comprises n TPMI domains, a precoding matrix indicated by each TPMI domain corresponds to a codebook subset, and the codebook subset comprises precoding matrices corresponding to partial transmission ranks.

Here, n is greater than or equal to 2, i.e., the DCI includes at least two TPMI fields.

Optionally, the size of each TPMI field in the DCI depends on the size of the codebook subset corresponding to the indicated precoding matrix, so as to reduce the number of bits occupied by the TPMI field as much as possible.

In this embodiment, the codebook subset is configured by the network side device for the terminal. The network side device may configure the terminal with a plurality of codebook subsets. For example, codebook subset 1, codebook subset 2 and codebook subset 3 may be configured, where codebook subset 1 contains precoding matrices corresponding to rank=1, 2,3, codebook subset 2 contains precoding matrices corresponding to rank=1, 2,4, and codebook subset 3 contains precoding matrices corresponding to rank=2, 3, 4.

According to the information indication method provided by the embodiment of the application, the codebook subset is introduced, the codebook subset comprises the precoding matrixes corresponding to part of transmission ranks, and the precoding matrix indicated by each TPMI domain in the DCI sent to the terminal corresponds to one codebook subset, so that the size of the TPMI domain in the DCI depends on the size of the corresponding codebook subset and is not related to the number of the precoding matrixes corresponding to all transmission ranks, and the cost of control signaling DCI is saved.

In the embodiment of the present application, for DCI sent to a terminal, where a corresponding relationship between a precoding matrix indicated by each TPMI domain and a codebook subset may satisfy at least one of the following:

A network indication; for example, the network side device may send indication information to the terminal, where the indication information indicates a correspondence between a precoding matrix indicated by each TPMI domain in the DCI and a codebook subset, where the indication information is sent, for example, through the DCI;

protocol conventions;

Predefined.

In the embodiment of the present application, TPMI fields in DCI may take different forms according to different transmission ranks of terminals, which is described below.

(1) When the transmission rank of the terminal is smaller than or equal to a first value, that is, the number of transmission data streams is smaller than or equal to a first value, the first value is smaller than or equal to the maximum transmission rank configured by the network, and precoding matrixes indicated by different TPMI domains in the DCI correspond to different codebook subsets.

Here, the first value described above may be a higher-level configuration or a protocol convention. For example, if the DCI includes two TPMI fields and codebook subset 1 (e.g. including precoding matrices corresponding to rank=1, 2, 3) and codebook subset 2 (e.g. including precoding matrices corresponding to rank=1, 2, 4) are configured, it is possible to: the precoding matrix indicated by the first TPMI domain corresponds to codebook subset 1, and the precoding matrix indicated by the second TPMI domain corresponds to codebook subset 2; or the precoding matrix indicated by the first TPMI domain corresponds to codebook subset 2, and the precoding matrix indicated by the second TPMI domain corresponds to codebook subset 1.

In some embodiments, the network side device may configure the maximum transmission rank through higher layer signaling, such as radio resource control (Radio Resource Control, RRC) signaling.

In some embodiments, when the DCI includes n TPMI fields, the DCI may further include a precoding matrix indicating field selection field indicating that the mth TPMI field is selected, the m is less than or equal to n, or the precoding matrix indicating field selection field indicates that at least two of the n TPMI fields are selected. Wherein, in consideration of full power transmission, when the precoding matrix indicator field indicates that at least two of the n TPMI fields are selected, a total transmission rank of the terminal is equal to a sum of transmission ranks corresponding to the precoding matrices indicated by the at least two TPMI fields.

For example, assuming that two TPMI fields and one precoding matrix indication field selection field are included in the control signaling DCI, the precoding matrix indication field selection field may indicate that any one of the following is selected: a first TPMI domain, a second TPMI domain, a first TPMI domain, and a second TPMI domain. When both TPMI fields are selected, the total transmission rank of the terminal is equal to the sum of transmission ranks corresponding to precoding matrices indicated by the two TPMI fields. For example, the precoding matrix indicates that the domain selection domain is selectable as 2 bits, and four states are total, wherein 00 indicates that the first TPMI domain is selected, 01 indicates that the second TPMI domain is selected, 11 indicates that the first PMI domain and the second TPMI domain are selected, and 10 indicates a reserved state.

In some embodiments, when the DCI includes n TPMI fields, the DCI may further include a precoding matrix indication field selection field, and when the precoding matrix indication field selection field indicates that at least two of the n TPMI fields are selected, the precoding matrix indicated by each of the at least two TPMI fields is a precoding matrix of a specific state (or referred to as a reserved state) in a corresponding codebook subset, and the transmission ranks corresponding to the precoding matrices indicated by each of the TPMI fields are the same, the total transmission rank of the terminal is equal to the transmission rank corresponding to the precoding matrix indicated by one TPMI field. Here, the precoding matrix of the specific state is, for example, the last few precoding matrices in the corresponding codebook subset. For example, if the codebook subset 1 includes precoding matrices corresponding to rank=1, 2, and 3, 28 precoding matrices corresponding to rank=1, 22 precoding matrices corresponding to rank=2, and 7 precoding matrices corresponding to rank=3, the codebook subset 1 includes 57 precoding matrices corresponding to rank=1, 2, and 3, and in addition, the codebook subset 1 may further have 7 precoding matrices in a specific state (or called a reserved state) set based on actual requirements; in this case, if precoding matrices in codebook subset 1 are indicated, 6 bits are required for the corresponding TPMI field, which may indicate 7 precoding matrices of a specific state in addition to 57 precoding matrices corresponding to rank=1, 2, and 3.

For example, assuming that the control signaling DCI includes two TPMI domains and one precoding matrix indication domain selection domain, one or more precoding matrices are reserved in the precoding matrices that can be indicated by each TPMI domain for specific indication, when the precoding matrix indication domain selection domain indicates that the transmission ranks that are selected by both TPMI domains and respectively correspond to the same transmission ranks, the total transmission rank of the terminal is equal to the transmission rank that is corresponding to the precoding matrix indicated by one TPMI domain, that is, the transmission ranks that are corresponding to the precoding matrices indicated by both TPMI domains are not overlapped.

For example, referring to table 5 below, table 5 shows precoding matrices and layers for 4 antenna ports when the maximum transmission rank is 2 or 3 or 4 and the uplink full power transmission is not configured or configured to full power mode 2 or configured to full power in the case where transform precoding is disabled.

TABLE 5

With respect to table 5, the right-most column of index12-15 is reserved, and the precoding matrix of the specific state is, for example, the right-most column of index 12-15.

(2) When the transmission rank of the terminal is greater than a second value, namely the transmission data stream number is greater than the second value, the second value is smaller than the maximum transmission rank configured by the network, and under the condition that double codeword transmission is enabled, the precoding matrix indicated by each TPMI domain in DCI corresponds to the same codebook subset; or in case of enabling single codeword transmission, precoding matrices indicated by different TPMI fields in the DCI correspond to different codebook subsets.

Here, the second value may be a higher-level configuration or a protocol convention. For example, if the DCI includes two TPMI fields and codebook subset 1 (e.g., including precoding matrices corresponding to rank=1, 2, 3), codebook subset 2 (e.g., including precoding matrices corresponding to rank=1, 2, 4), and codebook subset 3 (e.g., including precoding matrices corresponding to rank=2, 3, 4) are configured, then: under the condition of enabling (enabling) double-codeword transmission, the precoding matrix indicated by the first TPMI domain and the precoding matrix indicated by the second TPMI domain both correspond to codebook subset 3; or under the condition that single codeword transmission is enabled, the precoding matrix indicated by the first TPMI domain corresponds to codebook subset 1, the precoding matrix indicated by the second TPMI domain corresponds to codebook subset 2, i.e. the precoding matrices indicated by the first TPMI domain and the second TPMI domain respectively correspond to different codebook subsets.

It should be noted that the second value may be the same as or different from the first value described above.

In some embodiments, the network side device may configure the maximum transmission rank through higher layer signaling, such as RRC signaling.

In some embodiments, at this point (2), when the precoding matrix indicated by each TPMI field in the DCI corresponds to the same codebook subset, each TPMI field may include at least one specific bit for indicating other information, and other bits in each TPMI field except for the at least one specific bit indicate the precoding matrix. Here, the specific bit may be understood as a reserved bit, i.e., 1 or more bits are reserved in each TPMI domain, and the remaining bits indicate a specific precoding matrix. For example, if the size of each TPMI field is X bits, a specific precoding matrix may be indicated by the (X-1) bit of each TPMI field, and 1 bit may be reserved for indicating other information.

Optionally, the at least one specific bit may satisfy at least one of:

Indicating an offset of a modulation coding scheme (Modulation and coding scheme, MCS) at the time of dual codeword transmission relative to the modulation coding scheme MCS at the time of single codeword transmission; thus, the MCS in the double code word transmission can be determined by the offset without additional MCS indication;

Indicating redundancy versions (Redundancy Version, RV) at the time of dual codeword transmission; thus, bits in the DCI, which individually indicate RV, can be omitted, and DCI overhead is reduced.

Alternatively, for two specific bits in one or two TPMI domains of the DCI, that is, the two specific bits may be two specific bits in one TPMI domain or two specific bits in two TPMI domains, at least one of the following may be satisfied:

One specific bit indicates a new data indication (New Data indicator, NDI) at the time of transmission of the first codeword and the other specific bit indicates NDI at the time of transmission of the second codeword;

One specific bit indicates NDI at the time of double codeword transmission, and the other specific bit indicates an uplink shared channel UL-SCH at the time of double codeword transmission; this allows Channel State Information (CSI) reports to be transmitted on only one codeword;

Indicating the association of the Phase tracking reference signal (Phase-TRACKING REFERENCE SIGNAL, PTRS) and the Demodulation reference signal (Demodulation REFERENCE SIGNAL, DMRS) during the double codeword transmission; in this way, the bit which is used for independently indicating the association relation between the PTRS and the DMRS in the DCI can be omitted, and DCI overhead is reduced.

The application will now be described with reference to specific examples.

Example 1

According to the existing uplink 4Tx codebook, i.e., the codebooks shown in the above tables 1 to 4, there are 28 precoding matrices corresponding to rank=1, 22 precoding matrices corresponding to rank=2, 7 precoding matrices corresponding to rank=3, and 5 precoding matrices corresponding to rank=4. When the supported total rank=1, 2,3,4, the rank combinations respectively indicated by the two TPMI domains are {1,0}, {1,1}, {1,2}, {3,0}, {2,2}, and {0,4}. Assuming that the DCI includes two TPMI fields, corresponding to a first codebook subset and a second codebook subset, respectively, where,

The first codebook subset includes all precoding matrices of rank=1, 2,3, and there are 57 total precoding matrices, and the first TPMI field indicates one precoding matrix in the first codebook subset, and the size of the first TPMI field is 6 bits;

the second codebook subset includes all precoding matrices of rank=1, 2,4, and there are 55 total precoding matrices, and the second TPMI field indicates one precoding matrix in the second codebook subset, and the size of the second TPMI field is 6 bits;

Since there are 64 states in total of 6 bits, a first TPMI field may indicate 7 (i.e., 64-57) state-specific precoding matrices in a first codebook subset (e.g., arranged at the end of the first codebook subset) and a second TPMI field may indicate 9 (i.e., 64-55) state-specific precoding matrices in a second codebook subset (e.g., arranged at the end of the second codebook subset). For example, if the first TPMI field and the second TPMI field respectively indicate precoding matrices corresponding to the last specific states in the codebook subset, the transmission rank that can be indicated respectively is 1, and the total transmission rank is 1.

Example 2

According to the existing uplink 4Tx codebook, i.e., the codebooks shown in the above tables 1 to 4, there are 28 precoding matrices corresponding to rank=1, 22 precoding matrices corresponding to rank=2, 7 precoding matrices corresponding to rank=3, and 5 precoding matrices corresponding to rank=4. When the supported total rank=5, 6,7,8, the rank combinations respectively indicated by the two TPMI fields are {2,3}, {3,4}, and {4,4}. Assuming that two TPMI fields are included in the DCI, each TPMI field being 6 bits in size, corresponding to the same third codebook subset, where,

The third codebook subset includes all precoding matrices of rank=2, 3,4, and total 34 precoding matrices, and at least 2 precoding matrices (corresponding rank=2 or 3 or 4) can be further removed, so as to ensure that the total number of precoding matrices is less than or equal to 32, and can be indicated based on 5 bits; at this time, the first 5 bits or the last 5 bits of each of the two TPMI fields may be used to indicate a precoding matrix, and the remaining 1 bits indicate other information such as NDI, PTRS-DMRS relation, MCS offset, or the like.

Referring to fig. 3, fig. 3 is a flowchart of an information indication method provided in an embodiment of the present application, where the method is performed by a terminal, and as shown in fig. 3, the method includes the following steps:

Step 31: the terminal receives DCI from network side equipment, wherein the DCI comprises n TPMI domains, a precoding matrix indicated by each TPMI domain corresponds to a codebook subset, and the codebook subset comprises precoding matrices corresponding to partial transmission ranks.

According to the information indication method of the embodiment of the application, the codebook subset is introduced, the codebook subset comprises the precoding matrixes corresponding to part of transmission ranks, and the precoding matrix indicated by each TPMI domain in the DCI received from the network side equipment corresponds to one codebook subset, so that the size of the TPMI domain in the DCI depends on the size of the corresponding codebook subset and is not related to the number of the precoding matrixes corresponding to all the transmission ranks, thereby saving the DCI overhead of control signaling.

In the embodiment of the present application, for DCI received from a network side device, a corresponding relationship between a precoding matrix and a codebook subset indicated by each TPMI domain may satisfy at least one of the following:

protocol conventions;

Predefined.

Optionally, when the transmission rank of the terminal is smaller than or equal to a first value, the first value is smaller than or equal to a maximum transmission rank configured by the network, and precoding matrices indicated by different TPMI domains in the DCI correspond to different codebook subsets.

Further, the DCI further includes a precoding matrix indication field selection field, where when the precoding matrix indication field selection field indicates that at least two of the n TPMI fields are selected, the precoding matrix indicated by each of the at least two TPMI fields is a precoding matrix of a specific state in a corresponding codebook subset, and transmission ranks corresponding to the precoding matrices indicated by each of the TPMI fields are the same, a total transmission rank of the terminal is equal to a transmission rank corresponding to the precoding matrix indicated by one of the TPMI fields.

Optionally, when the transmission rank of the terminal is greater than a second value, the second value is smaller than a maximum transmission rank configured by the network, and in the case of enabling dual codeword transmission, the precoding matrix indicated by each TPMI domain corresponds to the same codebook subset; or in the case of enabling single codeword transmission, precoding matrices indicated by different TPMI fields in the DCI correspond to different codebook subsets.

Further, when the precoding matrix indicated by each TPMI field corresponds to the same subset of codebooks, each TPMI field includes at least one specific bit, and the other bits except for the at least one specific bit in each TPMI field indicate the precoding matrix.

Optionally, the at least one specific bit may satisfy at least one of:

Indicating an offset of the MCS at the time of the double codeword transmission relative to the modulation coding scheme MCS at the time of the single codeword transmission; thus, the MCS in the double code word transmission can be determined by the offset without additional MCS indication;

indicating RV at the time of double codeword transmission; thus, bits in the DCI, which individually indicate RV, can be omitted, and DCI overhead is reduced.

One specific bit indicates NDI at the time of transmission of the first codeword, and the other specific bit indicates NDI at the time of transmission of the second codeword;

One specific bit indicates NDI at the time of double codeword transmission, and the other specific bit indicates an uplink shared channel UL-SCH at the time of double codeword transmission; thus, the CSI report can be transmitted on only one code word;

Indicating the association relation between PTRS and DMRS in double code word transmission; in this way, the bit which is used for independently indicating the association relation between the PTRS and the DMRS in the DCI can be omitted, and DCI overhead is reduced.

According to the information indication method provided by the embodiment of the application, the execution subject can be an information indication device. In the embodiment of the present application, an information indicating device is described by taking an information indicating method performed by the information indicating device as an example.

Referring to fig. 4, fig. 4 is a schematic structural diagram of an information indicating apparatus according to an embodiment of the present application, where the apparatus is applied to a network side device, and as shown in fig. 4, the information indicating apparatus 40 includes:

A sending module 41, configured to send downlink control information DCI to a terminal, where the DCI includes n TPMI domains, each of precoding matrices indicated by the TPMI domains corresponds to a codebook subset, and the codebook subset includes precoding matrices corresponding to a part of transmission ranks, and n is greater than or equal to 2.

Optionally, the corresponding relation between the precoding matrix indicated by each TPMI domain and the codebook subset satisfies at least one of the following:

A network indication;

protocol conventions;

Predefined.

Optionally, the size of each TPMI domain depends on the size of the codebook subset corresponding to the precoding matrix indicated by the TPMI domain.

Optionally, the at least one specific bit satisfies at least one of:

indicating an offset of a modulation coding scheme at the time of dual codeword transmission relative to a modulation coding scheme at the time of single codeword transmission;

indicating a redundancy version RV in the double codeword transmission;

And/or, for two specific bits in one or two TPMI domains of the DCI, at least one of:

One specific bit indicates that new data at the time of transmission of a first codeword indicates NDI, and the other specific bit indicates NDI at the time of transmission of a second codeword;

One specific bit indicates NDI at the time of double codeword transmission, and the other specific bit indicates an uplink shared channel UL-SCH at the time of double codeword transmission;

and indicating the association relation between the phase tracking reference signal PTRS and the demodulation reference signal DMRS during double codeword transmission.

Optionally, the DCI further includes a precoding matrix indicating field selection field, where the precoding matrix indicating field selection field indicates selecting an mth TPMI field, where m is less than or equal to n, or where the precoding matrix indicating field selection field indicates selecting at least two TPMI fields of the n TPMI fields; and when the precoding matrix indication domain selection domain indicates that at least two of the n TPMI domains are selected, the total transmission rank of the terminal is equal to the sum of transmission ranks corresponding to the precoding matrices indicated by the at least two TPMI domains.

The information indicating device 40 provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in fig. 2, and achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

Referring to fig. 5, fig. 5 is a schematic structural diagram of an information indicating apparatus according to an embodiment of the present application, where the apparatus is applied to a terminal, and as shown in fig. 5, the information indicating apparatus 50 includes:

A receiving module 51, configured to receive DCI from a network side device, where the DCI includes n TPMI domains, each of precoding matrices indicated by the TPMI domains corresponds to a codebook subset, and the codebook subset includes precoding matrices corresponding to a part of transmission ranks, and n is greater than or equal to 2.

protocol conventions;

Predefined.

Optionally, the at least one specific bit may satisfy at least one of:

The information indicating device 50 provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in fig. 3, and achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

Optionally, as shown in fig. 6, the embodiment of the present application further provides a communication device 60, including a processor 61 and a memory 62, where the memory 62 stores a program or instructions that can be executed on the processor 61, for example, when the communication device 60 is a network-side device, the program or instructions implement the steps of the information indication method embodiment shown in fig. 2 when executed by the processor 61, and achieve the same technical effects. When the communication device 60 is a terminal, the program or the instructions, when executed by the processor 61, implement the steps of the embodiment of the information indication method shown in fig. 3, and achieve the same technical effects, and for avoiding repetition, will not be described herein.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for receiving DCI from network side equipment, the DCI comprises n TPMI domains, the precoding matrix indicated by each TPMI domain corresponds to a codebook subset, the codebook subset comprises precoding matrices corresponding to partial transmission ranks, and n is more than or equal to 2. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved.

Specifically, fig. 7 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 700 includes, but is not limited to: at least some of the components of the radio frequency unit 701, the network module 702, the audio output unit 703, the input unit 704, the sensor 705, the display unit 706, the user input unit 707, the interface unit 708, the memory 709, and the processor 710.

Those skilled in the art will appreciate that the terminal 700 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 710 via a power management system so as to perform functions such as managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 7 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, with the graphics processor 7041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts, a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from a network side device, the radio frequency unit 701 may transmit the downlink data to the processor 710 for processing; in addition, the radio frequency unit 701 may send uplink data to the network side device. Typically, the radio unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 709 may be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 709 may include volatile memory or nonvolatile memory, or the memory 709 may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM), static random access memory (STATIC RAM, SRAM), dynamic random access memory (DYNAMIC RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate Synchronous dynamic random access memory (Double DATA RATE SDRAM, DDRSDRAM), enhanced Synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCH LINK DRAM, SLDRAM), and Direct random access memory (DRRAM). Memory 709 in embodiments of the application includes, but is not limited to, these and any other suitable types of memory.

Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

The radio frequency unit 701 is configured to receive DCI from a network side device, where the DCI includes n TPMI domains, each of precoding matrices indicated by the TPMI domains corresponds to a codebook subset, and the codebook subset includes precoding matrices corresponding to a part of transmission ranks, and n is greater than or equal to 2.

The terminal 700 provided in the embodiment of the present application can implement each process implemented by the method embodiment shown in fig. 3, and achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the communication interface is used for sending DCI to a terminal, the DCI comprises n TPMI domains, the precoding matrix indicated by each TPMI domain corresponds to a codebook subset, the codebook subset comprises precoding matrixes corresponding to partial transmission ranks, and n is more than or equal to 2. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 8, the network side device 80 includes: an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84 and a memory 85. The antenna 81 is connected to a radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information via the antenna 81, and transmits the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes information to be transmitted, and transmits the processed information to the radio frequency device 82, and the radio frequency device 82 processes the received information and transmits the processed information through the antenna 81.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 83, and the baseband apparatus 83 includes a baseband processor.

The baseband device 83 may, for example, include at least one baseband board, where a plurality of chips are disposed, as shown in fig. 8, where one chip, for example, a baseband processor, is connected to the memory 85 through a bus interface, so as to call a program in the memory 85 to perform the network device operation shown in the above method embodiment.

The network-side device may also include a network interface 86, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 80 of the embodiment of the present invention further includes: instructions or programs stored in the memory 85 and executable on the processor 84, the processor 84 invokes the instructions or programs in the memory 85 to perform the method performed by the modules shown in fig. 4 and achieve the same technical result, and are not repeated here.

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above information indication method embodiment, and can achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, which comprises a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is used for running programs or instructions to realize the processes of the information indication method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and the description is omitted here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product stored in a storage medium, where the computer program/program product is executed by at least one processor to implement each process of the above-mentioned information indication method embodiment, and achieve the same technical effects, and are not repeated herein.

The embodiment of the application also provides a communication system, which comprises: the terminal and the network side device, the network side device may be used to execute the steps of the information indication method shown in fig. 2, and the terminal may be used to execute the steps of the information indication method shown in fig. 3.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. An information indicating method, comprising:

the method comprises the steps that network side equipment sends downlink control information DCI to a terminal, wherein the DCI comprises n Transmission Precoding Matrix Indication (TPMI) domains, each precoding matrix indicated by each TPMI domain corresponds to a codebook subset, the codebook subset comprises precoding matrixes corresponding to partial transmission ranks, and n is greater than or equal to 2.

2. The method of claim 1, wherein the precoding matrix indicated by each TPMI domain corresponds to a subset of codebooks satisfying at least one of:

A network indication;

protocol conventions;

Predefined.

3. The method of claim 1 wherein the size of each TPMI domain depends on the size of the codebook subset to which it indicates the precoding matrix.

4. The method of claim 1, wherein when a transmission rank of the terminal is less than or equal to a first value, the first value is less than or equal to a maximum transmission rank configured by a network, precoding matrices indicated by different TPMI fields in the DCI correspond to different codebook subsets.

5. The method of claim 4, wherein the DCI further comprises a precoding matrix indication field selection field, and when the precoding matrix indication field selection field indicates that at least two of the n TPMI fields are selected, the precoding matrix indicated by each of the at least two TPMI fields is a precoding matrix of a specific state in a corresponding codebook subset, and the transmission ranks corresponding to the precoding matrices indicated by each of the TPMI fields are the same, the total transmission rank of the terminal is equal to the transmission rank corresponding to the precoding matrix indicated by one of the TPMI fields.

6. The method of claim 1, wherein when the transmission rank of the terminal is greater than a second value, the second value is less than a network configured maximum transmission rank, and wherein the precoding matrix indicated by each TPMI domain corresponds to the same subset of codebooks if dual codeword transmission is enabled; or in the case of enabling single codeword transmission, precoding matrices indicated by different TPMI fields in the DCI correspond to different codebook subsets.

7. The method of claim 6 wherein each of the TPMI fields includes at least one particular bit when the precoding matrix indicated by the TPMI field corresponds to the same subset of codebooks, and wherein bits of each of the TPMI fields other than the at least one particular bit indicate the precoding matrix.

8. The method of claim 7, wherein the at least one particular bit satisfies at least one of:

indicating a redundancy version RV in the double codeword transmission;

And/or the number of the groups of groups,

For two particular bits in one or two TPMI fields of the DCI, at least one of:

9. The method of claim 1, wherein the DCI further comprises a precoding matrix indicating a domain selection field indicating a selection of an mth TPMI domain, the m being less than or equal to the n, or the precoding matrix indicating a domain selection field indicating a selection of at least two of the n TPMI domains;

And when the precoding matrix indication domain selection domain indicates that at least two of the n TPMI domains are selected, the total transmission rank of the terminal is equal to the sum of transmission ranks corresponding to the precoding matrices indicated by the at least two TPMI domains.

10. An information indicating method, comprising:

11. The method of claim 10, wherein the precoding matrix indicated by each TPMI domain corresponds to a subset of codebooks satisfying at least one of:

A network indication;

protocol conventions;

Predefined.

12. The method of claim 10 wherein the size of each TPMI domain depends on the size of the codebook subset to which it indicates the precoding matrix.

13. The method of claim 10, wherein when a transmission rank of the terminal is less than or equal to a first value, the first value is less than or equal to a maximum transmission rank configured by a network, precoding matrices indicated by different TPMI fields in the DCI correspond to different codebook subsets.

14. The method of claim 13, wherein the DCI further comprises a precoding matrix indication field selection field, and wherein when the precoding matrix indication field selection field indicates that at least two of the n TPMI fields are selected, the precoding matrix indicated by each of the at least two TPMI fields is a precoding matrix of a specific state in a corresponding codebook subset, and the transmission ranks corresponding to the precoding matrices indicated by each of the TPMI fields are the same, the total transmission rank of the terminal is equal to the transmission rank corresponding to the precoding matrix indicated by one of the TPMI fields.

15. The method of claim 10, wherein when the transmission rank of the terminal is greater than a second value, the second value is less than a network configured maximum transmission rank, and wherein the precoding matrix indicated by each TPMI domain corresponds to the same subset of codebooks if dual codeword transmission is enabled; or in the case of enabling single codeword transmission, precoding matrices indicated by different TPMI fields in the DCI correspond to different codebook subsets.

16. The method of claim 15 wherein each of the TPMI fields includes at least one particular bit when the precoding matrix indicated by the TPMI field corresponds to the same subset of codebooks, and wherein bits of each of the TPMI fields other than the at least one particular bit indicate the precoding matrix.

17. An information indicating apparatus, comprising:

A sending module, configured to send downlink control information DCI to a terminal, where the DCI includes n TPMI domains, each of precoding matrices indicated by the TPMI domains corresponds to a codebook subset, where the codebook subset includes precoding matrices corresponding to a part of transmission ranks, and n is greater than or equal to 2.

18. An information indicating apparatus, comprising:

19. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the information indication method of any one of claims 1 to 9.

20. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the information indication method of any of claims 10 to 16.

21. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the information indicating method according to any one of claims 1 to 9 or the steps of the information indicating method according to any one of claims 10 to 16.