Wireless communication method and apparatus, and device

Abstract

The present application relates to the field of communications, and discloses a wireless communication method and apparatus, and a device. The wireless communication method comprises: a terminal sending an uplink demodulation reference signal (DMRS) to a network-side device by means of a target DMRS port, the target DMRS port satisfying at least one of the following: one-to-one mapping between the target DMRS port and an antenna port, the target DMRS port not being associated with physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port utilizing a precoding means different from that of PUSCH transmission, and the target DMRS port not being precoded.

Description

Wireless communication method, apparatus and device

[0001] Cross Reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202411344651.2, filed on September 25, 2024, and entitled "Wireless communication method, apparatus and device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the field of communication technology, and particularly relates to a wireless communication method, apparatus and device. BACKGROUND

[0004] In a New Radio (NR) system, uplink channel (such as Channel State Information (CSI)) measurement is mainly implemented through a Sounding Reference Signal (SRS). However, using the SRS will occupy a large resource overhead, especially for periodic SRS resources, which occupies a large overall resource overhead. How to reduce the resource overhead of uplink channel measurement is a problem to be solved. SUMMARY

[0005] Embodiments of the present application provide a wireless communication method, apparatus and device, which can solve the problem of large resource overhead of uplink channel measurement.

[0006] In a first aspect, a wireless communication method is provided, comprising:

[0007] The terminal sends an uplink Demodulation Reference Signal (DMRS) to a network side device through a target DMRS port.

[0008] The target DMRS port satisfies at least one of the following:

[0009] The target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with Physical Uplink Shared Channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from PUSCH transmission, and the target DMRS port is not precoded.

[0010] In a second aspect, a wireless communication method is provided, comprising:

[0011] The network side device receives an uplink DMRS sent by a terminal through a target DMRS port, and determines channel information according to the uplink DMRS.

[0012] The target DMRS port satisfies at least one of the following:

[0013] The target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from the PUSCH transmission, and the target DMRS port is not precoded.

[0014] In a third aspect, a wireless communication apparatus is provided, comprising:

[0015] The sending module is configured to send, to a network side device, an uplink DMRS through a target demodulation reference signal (DMRS) port.

[0016] The target DMRS port satisfies at least one of the following:

[0017] The target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from the PUSCH transmission, and the target DMRS port is not precoded.

[0018] In a fourth aspect, a wireless communication apparatus is provided, comprising:

[0019] The receiving module is configured to receive an uplink DMRS sent by a terminal through a target demodulation reference signal (DMRS) port.

[0020] The processing module is configured to determine channel information according to the uplink DMRS.

[0021] The target DMRS port satisfies at least one of the following:

[0022] The target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from the PUSCH transmission, and the target DMRS port is not precoded.

[0023] In a fifth aspect, a wireless communication apparatus is provided, which is configured to perform the steps of the method according to the first aspect, or implement the steps of the method according to the second aspect.

[0024] In a sixth aspect, a terminal is provided, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method according to the first aspect.

[0025] In a seventh aspect, a terminal is provided, comprising a processor and a communication interface; wherein the communication interface is configured to send, to a network-side device, an uplink demodulation reference signal (DMRS) via a target DMRS port;

[0026] wherein the target DMRS port satisfies at least one of the following:

[0027] the target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port adopts a precoding manner different from that of the PUSCH transmission, and the target DMRS port is not precoded.

[0028] In an eighth aspect, a network-side device is provided, comprising a processor and a memory, wherein the memory stores programs or instructions executable on the processor, and the programs or instructions, when executed by the processor, implement the steps of the method according to the second aspect.

[0029] In a ninth aspect, a network-side device is provided, comprising a processor and a communication interface;

[0030] wherein the communication interface is configured to receive an uplink DMRS sent by a terminal via a target DMRS port, and the processor is configured to determine channel information according to the uplink DMRS.

[0031] wherein the target DMRS port satisfies at least one of the following:

[0032] the target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a PUSCH transmission, the mapping between the target DMRS port and the antenna port adopts a precoding manner different from that of the PUSCH transmission, and the target DMRS port is not precoded.

[0033] In a tenth aspect, a readable storage medium is provided, wherein the readable storage medium stores programs or instructions, and the programs or instructions, when executed by a processor, implement the steps of the method according to the first aspect or the steps of the method according to the second aspect.

[0034] In an eleventh aspect, a wireless communication system is provided, comprising a terminal and a network-side device, wherein the terminal is configured to implement the steps of the method according to the first aspect, and the network-side device is configured to implement the steps of the method according to the second aspect.

[0035] In a twelfth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface and the processor are coupled, the processor is configured to run programs or instructions to implement the method in the first aspect or implement the method in the second aspect.

[0036] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium, and is executed by at least one processor to implement the steps of the wireless communication method in the first aspect or implement the steps of the wireless communication method in the second aspect.

[0037] In the embodiments of the present application, the terminal sends the uplink DMRS to the network side device through the target DMRS port; wherein the target DMRS port satisfies at least one of the following conditions: one-to-one mapping between the target DMRS port and the antenna port, the target DMRS port is not associated with PUSCH transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from the PUSCH transmission, and the target DMRS port is not precoded. Specifically, the network side device can determine the channel information (such as CSI) based on the uplink DMRS. Compared with the measurement result of the SRS (such as the periodic SRS), the uplink channel measurement function can be provided by using the DMRS in the case of a larger SRS period, the SRS resource overhead is reduced, and the resource overhead of the uplink channel measurement is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0038] FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.

[0039] FIG. 2 is an example of a DMRS configuration type 1 provided by an embodiment of the present application.

[0040] FIG. 3 is an example of a DMRS configuration type 2 provided by an embodiment of the present application.

[0041] FIG. 4 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.

[0042] FIG. 5 is a schematic block diagram of a wireless communication device provided by an embodiment of the present application.

[0043] FIG. 6 is a schematic block diagram of another wireless communication device provided by an embodiment of the present application.

[0044] FIG. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application.

[0045] FIG. 8 is a schematic diagram of the hardware structure of a terminal provided by an embodiment of the present application.

[0046] FIG. 9 is a schematic block diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0048] The terms "first", "second", and the like in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second" are generally a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, the protection scope of "A or B" at least covers three schemes, namely, scheme one: including A and not including B; scheme two: including B and not including A; scheme three: including A and including B. In addition, the terms "A and / or B", "at least one of A and B", "at least one of A or B" also at least cover the above three schemes, respectively. The character " / " generally represents that the objects before and after are in an "or" relationship.

[0049] The term "indication" in the present application can be a direct indication (or explicit indication) or an indirect indication (or implicit indication). The direct indication can be understood as the sender explicitly informing the receiver of the specific information, the operation to be performed or the requested result, etc. in the indication sent by the sender. The indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or judging and determining the operation to be performed or the requested result, etc. according to the judgment result.

[0050] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems. th

[0051] Figure 1 shows a block diagram of a wireless communication system to which the embodiments of the present application can be applied. Specifically, the wireless communication system includes a terminal 11 and a network side device 12.

[0052] ​Terminal 11 can be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipborne equipment, pedestrian user equipment (PUE), smart home device (home device with wireless communication function, such as refrigerator, television, washing machine or furniture), game console, personal computer (PC), ATM or self-service machine, etc. Wearable devices include: smartwatches, smart bracelets, smart earphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among these, in-vehicle devices can also be referred to as in-vehicle terminals, in-vehicle controllers, in-vehicle modules, in-vehicle components, in-vehicle chips, or in-vehicle units, etc. It should be noted that the specific type of terminal 11 is not limited in the embodiments of this application.

[0053] Among them, network-side equipment 12 may include access network equipment or core network equipment.

[0054] Optionally, the access network device can also be referred to as a radio access network (RAN) device, a radio access network function or a radio access network unit. The access network device can include a base station, a wireless local area network (WLAN) access point (AP) or a wireless fidelity (WiFi) node, etc. Among them, the base station can be referred to as a node B (NB), an evolved node B (eNB), a next generation node B (gNB), a new radio node B (NR node B), an access point, a relay base station (RBS), a serving base station (SBS), a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home node B (HNB), a home evolved node B, a transmit / receive point (TRP), or some other suitable term in the art, as long as the same technical effect is achieved. The base station is not limited to a specific technical term, and it should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0055] Optionally, the core network device can also be referred to as a core network node, a core network function, or a core network network element, etc., which includes but is not limited to at least one of the following: a mobility management entity (MME), an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a policy control function (PCF), a policy and charging rules function (PCRF), an edge application server discovery function (EASDF), a unified data management (UDM), a unified data repository (UDR), a home subscriber server (HSS), a centralized network configuration (CNC), a network repository function (NRF), a network exposure function (NEF), a local NEF (L-NEF), a binding support function (BSF), an application function (AF), a location management function (LMF), a gateway mobile location center (GMLC), a network data analytics function (NWDAF), etc. It should be noted that only the core network device in the NR system is taken as an example for introduction in the embodiments of the present application, and the specific type of the core network device is not limited. If the name of the core network device mentioned in the embodiments of the present application changes in the subsequent protocol version (for example, 6G), it is also within the protection scope of the present application.

[0056] Optionally, the core network device can be implemented by one or more function modules in one device, or can be implemented by multiple devices together, and the embodiments of the present application do not make a specific limitation here. It can be understood that the above function modules can be network elements in a hardware device, can be software function modules running on a special hardware, or can be virtualized function modules instantiated on a platform (for example, a cloud platform).

[0057] In order to better understand the technical solutions of the present application, the DMRS configuration related to the present application is described below.

[0058] In Release-15 (Rel-15) of NR, a demodulation reference signal (DMRS) is used for channel estimation, and the related DMRS configuration information is determined by downlink control information (DCI). In the NR system, the number of DMRS ports is equal to the number of streams of a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH).

[0059] For the DMRS of the data channel, according to the type of the DMRS, it can be divided into: DMRS configuration type 1 and DMRS configuration type 2, and both of the two DMRS configuration types support single-symbol and double-symbol structures. Among them, the single-symbol structure of the DMRS configuration type 1 supports a maximum of 4 ports, and the double-symbol structure supports a maximum of 8 ports; the single-symbol structure of the DMRS configuration type 2 supports a maximum of 6 ports, and the double-symbol structure supports a maximum of 12 ports. In addition, the DMRS configuration type 1 supports 2 code division multiplexing (CDM) groups, and the DMRS configuration type 2 supports 3 CDM groups.

[0060] Specifically, the DMRS configuration type 1 can be as shown in FIG. 2, and the DMRS configuration type 2 can be as shown in FIG. 3.

[0061] In Release-18 (Rel-18) of NR, the length-4 Frequency Division Orthogonal Cover Code (FD-OCC) sequence is adopted to double the number of ports in each CDM group. For DMRS configuration type 1, the single-symbol structure will support a maximum of 8 ports, and the double-symbol structure will support a maximum of 16 ports; for DMRS configuration type 2, the single-symbol structure will support a maximum of 12 ports, and the double-symbol structure will support a maximum of 24 ports. In addition, in Rel-18, the number of PUSCH data streams per terminal will also be expanded from a maximum of 4 streams to a maximum of 8 streams. That is, the corresponding DMRS of the PUSCH transmitted by each terminal will also need a maximum of 8 ports for multiplexing. However, whether to use the Rel-15 DMRS port for multiplexing or the Rel-18 enhanced DMRS port depends on the capability of the terminal.

[0062] For example, as shown in Table 1, the network side device indicates the index of the DMRS port, the number of front loaded symbols, and the number of DMRS CDM groups without data in the 'Antenna port' field in the DCI.

[0063] Among them, 'number of DMRS CDM group(s) without data' is used to indicate the DMRS CDM group(s) that will be used by other terminals at the same time in this scheduling transmission. For example, for DMRS configuration type 2, the CDM group of DMRS is up to 3, and is distinguished by frequency-division multiplexing (FDM). If the network side device indicates that the current terminal uses all 3 CDM group DMRS ports, 'number of DMRS CDM group(s) without data' is 3 by default, so for a certain layer, data is not sent on the resource elements (REs) of the other 2 CDM groups, and the power of the DMRS is increased (boosted) by 4.77dB compared with the power of the PUSCH RE. If the network side device indicates that the current terminal uses only 2 CDM group DMRS ports in the CDM group, if 'number of DMRS CDM group(s) without data' is indicated as 3, then another CDM group is used for other terminals to send DMRS, so for a certain layer, data is not sent on the REs of the other 2 CDM groups, and the DMRS power is boosted by 4.77dB compared with the PUSCH RE power; if 'number of DMRS CDM group(s) without data' is indicated as 2, then there is no other CDM group for other terminals to send DMRS, so for a certain layer, there is 1 sending data and 1 not sending data on the REs of the other 2 CDM groups, and the DMRS power is boosted by 3dB compared with the PUSCH RE power. If the network side device indicates that the current terminal uses only 1 CDM group DMRS port in the CDM group, if 'number of DMRS CDM group(s) without data' is indicated as 3, then in addition to the 1 CDM group occupied by the current terminal itself, there are another 2 CDM groups for other terminals to send DMRS; then for a certain layer of the current terminal, data is not sent on the REs of the other 2 CDM groups, and the DMRS power is boosted by 4.77dB compared with the PUSCH RE power.If 'number of DMRS CDM group(s) without data' is indicated as 2, then there is another 1 CDM group for other UE to transmit DMRS besides the 1 CDM group occupied by the current UE itself; then for a certain layer of the current UE, on the RE of the other 2 CDM groups, 1 can be used to transmit data, and 1 cannot be used to transmit data, and the DMRS power is boosted by 3dB compared with the PUSCH RE power. If 'number of DMRS CDM group(s) without data' is indicated as 1, then there is no other 1 CDM group for other UE to transmit DMRS besides the 1 CDM group occupied by the current UE itself; then for a certain layer of the current UE, on the RE of the other 2 CDM groups, both can be used to transmit data, and the DMRS power is the same as the PUSCH RE power.

[0064] Table 1 Antenna port(s), transform precoder is disabled, dmrs-Type = 2, maxLength = 2, rank = 2

[0065] It should be noted that the total number of CDM groups-Number of DMRS CDM group(s) without data is the resource of the DMRS CDM group that can transmit data. Then, the CDM group resource that cannot transmit data, i.e. the resource actually transmitting DMRS, is agreed in Table 1. Number of DMRS CDM group(s) without data- the CDM group configured for the current UE, which can be implicitly understood as the CDM group resource for other UEs to transmit DMRS.

[0066] In order to better understand the technical solutions of the present application, the following describes the numbering of the uplink antenna ports related to the present application.

[0067] The following antenna ports are defined for uplink:

[0068] The antenna ports starting with 0 are used for the DMRS of PUSCH;

[0069] The antenna ports of SRS and PUSCH start with 1000;

[0070] The antenna port of a physical uplink control channel (PUCCH) starts from 2000;

[0071] The antenna port of a physical random access channel (PRACH) is 4000.

[0072] The wireless communication method provided by the embodiments of the present application is described in detail below in combination with the accompanying drawings, some embodiments and application scenarios.

[0073] FIG. 4 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG. 4, the wireless communication method 200 can include at least part of the following contents:

[0074] In S210, a terminal sends an uplink DMRS to a network side device through a target DMRS port. The target DMRS port satisfies at least one of the following conditions: one-to-one mapping between the target DMRS port and an antenna port, no association of the target DMRS port with PUSCH transmission, different precoding manner between the target DMRS port and the antenna port from that of the PUSCH transmission, and no precoding of the target DMRS port.

[0075] In S220, the network side device receives the uplink DMRS sent by the terminal through the target DMRS port.

[0076] In S230, the network side device determines channel information according to the uplink DMRS.

[0077] It should be understood that FIG. 4 shows steps or operations of the wireless communication method 200, but these steps or operations are only examples, and the present application can also perform other operations or variations of each operation in FIG. 4.

[0078] In the embodiments of the present application, a terminal sends an uplink DMRS to a network side device through a target DMRS port. The target DMRS port satisfies at least one of the following conditions: one-to-one mapping between the target DMRS port and an antenna port, no association of the target DMRS port with PUSCH transmission, different precoding manner between the target DMRS port and the antenna port from that of the PUSCH transmission, and no precoding of the target DMRS port. Specifically, the network side device can determine channel information (such as CSI) based on the uplink DMRS. Compared with determining channel information (such as CSI) based on the measurement result of the SRS (such as periodic SRS), the uplink channel measurement function can be provided by using the DMRS in the case of a large SRS period, the SRS resource overhead is reduced, and the resource overhead of the uplink channel measurement is reduced.

[0079] The target DMRS port described in the embodiments of the present application can be equivalent to or replaced by additional DMRS port(s) or DMRS for CSI, and the embodiments of the present application do not limit this.

[0080] The target DMRS port described in the embodiments of the present application can include at least one DMRS port, that is, the target DMRS port described in the embodiments of the present application can also be referred to as a DMRS port group or a DMRS port set, and the embodiments of the present application do not limit this.

[0081] The antenna port described in the embodiments of the present application can be equivalent to or replaced by a PUSCH port or an SRS port, and the embodiments of the present application do not limit this. The one-to-one mapping between the target DMRS port and the antenna port described in the embodiments of the present application can also be understood as: the target DMRS port is not precoded.

[0082] The target DMRS port described in the embodiments of the present application is not associated with PUSCH transmission, and can also be understood as: the DMRS transmission of the target DMRS port is decoupled from the PUSCH transmission; or, the target DMRS port only transmits DMRS and does not transmit PUSCH; or, the transmission on the target DMRS port can be a bare channel transmission.

[0083] The mapping between the target DMRS port and the antenna port described in the embodiments of the present application adopts a precoding manner different from PUSCH transmission, for example, the mapping between the target DMRS port and the antenna port adopts wideband precoding, while the PUSCH transmission adopts conventional narrowband precoding; or, the mapping between the target DMRS port and the antenna port adopts precoding shared by multiple UEs, while the PUSCH transmission adopts UE-specific precoding; or, the mapping between the target DMRS port and the antenna port adopts one-to-one mapping precoding, while the PUSCH transmission adopts conventional precoding (such as indicated by transmission precoding matrix indicator, TPMI).

[0084] It should be noted that in order to reduce the SRS overhead, in some scenarios, it is considered to increase the period of SRS. However, for uplink transmission or downlink transmission, increasing the period of SRS will cause the network side device (such as a base station) to be unable to timely measure and adjust the precoding of uplink transmission or the precoding of downlink transmission according to the SRS. Therefore, in the case of insufficient SRS resources, the embodiments of the present application consider that the channel information (such as CSI) can be determined and the precoder can be updated based on the measurement result of the uplink DMRS (such as PUSCH DMRS). Specifically, the transmission on the target DMRS port can be a bare channel transmission (the target DMRS port is not associated with PUSCH transmission); the network side device (such as a base station) can determine the channel information (such as CSI) or reduce the SRS transmission on the SRS resource according to the measurement result of the uplink DMRS on the bare channel.

[0085] In some embodiments, the target DMRS port is a DMRS port other than the DMRS port associated with the PUSCH layer among all DMRS ports. Optionally, all DMRS ports are all the DMRS ports transmitted by the terminal.

[0086] Optionally, in addition to the DMRS port associated with the PUSCH layer and the target DMRS port, there can be other DMRS ports, which are not limited in the embodiments of the present application.

[0087] For example, the target DMRS port is at least part of the DMRS ports of all DMRS ports. Wherein, the at least part of the DMRS ports are DMRS ports on at least part of the DMRS symbols or on at least part of the DMRS bandwidth. For example, if the target DMRS port is a DMRS port on at least part of the DMRS symbols or on at least part of the DMRS bandwidth, wherein the at least part of the DMRS symbols are indicated by the network side, or the at least part of the DMRS bandwidth is indicated by the network side.

[0088] Optionally, the DMRS port associated with the PUSCH layer satisfies at least one of the following characteristics: the number of DMRS ports = the number of ranks; precoding after sending; one-to-one correspondence with the PUSCH layer.

[0089] It should be noted that the DMRS port associated with the PUSCH layer can also be referred to as or replaced by: the DMRS port related to the PUSCH transmission, or the DMRS port bound to the PUSCH transmission, or the DMRS port corresponding one-to-one to the PUSCH layer.

[0090] In the embodiments of the present application, the total number of DMRS ports is greater than the rank number, and / or the total number of DMRS ports is greater than the number of DMRS ports associated with the PUSCH layer. In some embodiments, the number of target DMRS ports is the difference between the total number of DMRS ports and the rank number. For example, the number of target DMRS ports = the total number of DMRS ports - the rank number; or the total number of DMRS ports = the rank number + the number of target DMRS ports.

[0091] In some embodiments, the target DMRS port is the DMRS port corresponding to the column in which there is only one non-zero value in the precoding matrix. Thus, the target DMRS port can be determined based on the precoding matrix.

[0092] It should be noted that the rows of the precoding matrix correspond to the antenna ports, the columns of the precoding matrix correspond to the DMRS ports, and the number of columns of the precoding matrix = the total number of DMRS ports.

[0093] For example, one example of the precoding matrix can be as follows:

[0094] In this example, the 2nd column and the 3rd column of the precoding matrix are columns in which there is only one non-zero value, and the target DMRS ports are the DMRS ports corresponding to the 2nd column and the 3rd column of the precoding matrix, in other words, the DMRS ports of the 2nd column and the 3rd column of the precoding matrix can be considered as bare channel transmission.

[0095] For example, another example of the precoding matrix can be as follows:

[0096] In this example, each column of the precoding matrix is a column in which there is only one non-zero value, and the target DMRS ports are the DMRS ports corresponding to all columns of the precoding matrix, in other words, the DMRS ports of all columns of the precoding matrix can be considered as bare channel transmission.

[0097] In some embodiments, the wireless communication method 200 further comprises:

[0098] The terminal receives first information from the network side device; wherein the first information is used to indicate at least one of the following:

[0099] The number of target DMRS ports; the index of the target DMRS port; the total number of DMRS ports; the index of all DMRS ports; the index of the DMRS port associated with the PUSCH layer.

[0100] In the embodiment, the terminal can learn at least one of the following based on the first information received from the network side device: the number of target DMRS ports, the index of target DMRS ports, the total number of DMRS ports, the index of all DMRS ports, and the index of DMRS ports associated with the PUSCH layer; then, the terminal can send uplink DMRS to the network side device through the target DMRS port, and the network side device can determine the channel information (such as CSI) based on the uplink DMRS. Compared with the measurement result of SRS (such as periodic SRS), the DMRS can provide uplink channel measurement function in the case of large SRS period, reduce SRS resource overhead, and reduce resource overhead of uplink channel measurement.

[0101] For example, the first information indicates the index of the target DMRS port, which is different from the index of the DMRS port associated with the PUSCH layer.

[0102] For example, the terminal can determine the index of all DMRS ports according to the total number of DMRS ports, wherein the index of the target DMRS port is the index of the DMRS port in the index of all DMRS ports except the index of the DMRS port associated with the PUSCH layer.

[0103] For example, the index of the DMRS port associated with the PUSCH layer and the index of the target DMRS are indicated by different information fields in the DCI.

[0104] Optionally, the number of DMRS CDM groups associated with all DMRS ports does not exceed the number of DMRS CDM groups without data indicated by the network side.

[0105] In some embodiments, the first information can be carried by first control signaling.

[0106] Optionally, the first control signaling can include but is not limited to at least one of the following: radio resource control (RRC) signaling, downlink control information (DCI), and media access control control element (MAC CE).

[0107] For example, the first control signaling is DCI for scheduling PUSCH, such as but not limited to DCI 0-1 or DCI 0-2.

[0108] In some embodiments, the wireless communication method 200 further comprises:

[0109] The terminal receives second information from the network side device; wherein the second information is used to indicate a target row index of a first table; wherein the first table is a table associated with the target DMRS port, and the target row index is used to indicate indexes of all DMRS ports, and the indexes of all DMRS ports include indexes of the target DMRS port and DMRS ports associated with the PUSCH layer.

[0110] Optionally, the first table can also be understood as a table associated with indexes of all DMRS ports.

[0111] In this embodiment, the terminal can determine indexes of all DMRS ports based on the target row index of the first table indicated by the second information, and further, the terminal can determine indexes of the target DMRS port and DMRS ports associated with the PUSCH layer from the indexes of all DMRS ports.

[0112] In this embodiment, the table for determining the index of the target DMRS port is related to the total number of DMRS ports, rather than directly related to the rank number. In this embodiment, the indexes of the DMRS ports associated with the PUSCH layer and the indexes of the target DMRS port are in the same row of the first table.

[0113] Optionally, the target row index can be an 'antenna port' field in DCI.

[0114] In some embodiments, the first X DMRS port indexes in the indexes of all DMRS ports indicated by the target row index are indexes of the DMRS ports associated with the PUSCH layer, and the last Y DMRS port indexes in the indexes of all DMRS ports indicated by the target row index are indexes of the target DMRS port, wherein X is the rank number, Y is the number of the target DMRS ports, the sum of X and Y is equal to the total number of DMRS ports, and X and Y are positive integers.

[0115] In some embodiments, the odd-numbered DMRS port indexes in the indexes of all DMRS ports indicated by the target row index are indexes of the DMRS ports associated with the PUSCH layer, and the even-numbered DMRS port indexes in the indexes of all DMRS ports indicated by the target row index are indexes of the target DMRS port.

[0116] In some embodiments, the even bit of the index of the total DMRS ports indicated by the target row index is the index of the DMRS port associated with the PUSCH layer, and the odd bit of the index of the total DMRS ports indicated by the target row index is the index of the target DMRS port.

[0117] In some embodiments, the terminal determines the index of the DMRS port associated with the PUSCH layer and / or the index of the target DMRS port from the index of the total DMRS ports indicated by the target row index according to a specific rule or a network side indication.

[0118] Optionally, the specific rule can be indicated by the network side, or the specific rule can be agreed by the protocol.

[0119] Optionally, the first table is determined based on the total number of DMRS ports from M tables, where M is a positive integer. Optionally, the M tables can be agreed by the protocol, or the M tables can be pre-configured by the network side.

[0120] Optionally, the terminal determines a table (i.e., the first table) associated with the target DMRS port from the M tables agreed by the protocol; wherein the M tables agreed by the protocol include at least one table associated with the total number of DMRS ports; and the terminal determines the table associated with the target DMRS port according to the total number of DMRS ports, the DMRS type (dmrs-Type, such as DMRS type 1 or DMRS type 2), the DMRS symbol type (also referred to as the maximum length (maxLength), such as maxLength = 1 or maxLength = 2), whether to enable the transform precoder, etc. Optionally, the total number of DMRS ports can be determined according to the total number of DMRS ports indicated in the first information, or the total number of DMRS ports can be determined according to the number of target DMRS ports indicated in the first information in combination with the rank indication.

[0121] For example, one implementation of the first table can be shown in Table 2, transform precoder is disabled, dmrs-Type = 1, maxLength = 2, Number of DMRS port = 4. In one row of the first table, at least one of the following is included: DMRS port(s), Number of DMRS CDM group(s) without data, Number of front-load symbols.

[0122] Table 2 Antenna port(s), transform precoder is disabled, dmrs-Type = 1, maxLength = 2, Number of DMRS port = 4

[0123] For example, another implementation of the first table can be shown in Table 3, transform precoder is disabled, dmrs-Type = 2, maxLength = 2, Number of DMRS port = 2.

[0124] Table 3 Antenna port(s), transform precoder is disabled, dmrs-Type = 2, maxLength = 2, Number of DMRS port = 2

[0125] In some embodiments, the second information can be carried by a second control signaling. Optionally, the second control signaling can include, but is not limited to, at least one of the following: RRC signaling, DCI, MAC CE.

[0126] For example, the second control signaling is DCI scheduling PUSCH, such as, but not limited to, DCI 0-1 or DCI 0-2.

[0127] In some embodiments, the wireless communication method 200 further includes:

[0128] The terminal receives third information from the network side device;

[0129] The third information is used for indicating at least one row index of the second table.

[0130] The second table is a table associated with the target DMRS port, and the at least one row index is used for indicating at least one of the following: an index of the target DMRS port, and an index of a DMRS port associated with a PUSCH layer.

[0131] In this embodiment, the terminal can determine at least one of the following based on the at least one row index of the second table indicated by the third information: the index of the target DMRS port, and the index of the DMRS port associated with the PUSCH layer.

[0132] In this embodiment, the terminal can determine, according to the rank number, a table (i.e., the second table) associated with the target DMRS port; and determine, according to the at least one row index indicated in the control command, the index of the DMRS port associated with the PUSCH layer and the index of the target DMRS port. The index of the DMRS port associated with the PUSCH layer and the index of the target DMRS port correspond to different rows of the same table respectively.

[0133] Optionally, the second table is a table associated with the target DMRS port, which can also be understood as a table associated with the rank number. Optionally, the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows of the second table respectively.

[0134] In some embodiments, the at least one row index comprises a first row index and at least one second row index; wherein the first row index is used to indicate the index of the DMRS port associated with the PUSCH layer, and the at least one second row index is used to indicate the index of the target DMRS port. Optionally, the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table. Optionally, the row corresponding to the row index indicates at least one of the number of DMRS CDM groups without data, the number of front-load symbols, in addition to the DMRS port index; optionally, the target DMRS port has the same at least one of the number of DMRS CDM groups without data, the number of front-load symbols as the DMRS port associated with the PUSCH layer; and optionally, in the other rows with the same at least one of the number of DMRS CDM groups without data, the number of front-load symbols as the row corresponding to the first row index, the terminal determines or is indicated the at least one second row index (the index of the target DMRS port).

[0135] For example, the row with a smaller or larger row index corresponds to the index of the DMRS port associated with the PUSCH layer, and the remaining row indexes correspond to the index of the target DMRS port.

[0136] In some embodiments, the at least one row index comprises a first row index, the first row index is used to indicate an index of the DMRS port associated with the PUSCH layer; optionally, there is a first association relationship between the first row index and an index of a row in which the index of the target DMRS port is located; or, the index of the row in which the index of the target DMRS port is located is an index of a row W rows after the first row index, or the index of the row in which the index of the target DMRS port is located is an index of a row W rows before the first row index, W being a positive integer. Optionally, the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table. Optionally, the row corresponding to the row index indicates at least one of a number of DMRS CDM groups without data and a number of front-load symbols corresponding to the DMRS in addition to indicating the DMRS port index. Optionally, the first association relationship can include at least one of the following: the target DMRS port and the DMRS port associated with the PUSCH layer correspond to at least one of a number of DMRS CDM groups without data and a number of front-load symbols; the row corresponding to the target DMRS port is adjacent to the row corresponding to the PUSCH layer DMRS port. Optionally, in other rows in which at least one of a number of DMRS CDM groups without data and a number of front-load symbols is the same as in the row of the first row index, the terminal determines or is instructed to determine the index of the target DMRS port (or at least one second row index).

[0137] Optionally, the first association relationship is indicated by the network side, or the first association relationship is agreed by the protocol.

[0138] Optionally, the value of W is indicated by the network side, or the value of W is agreed by the protocol. For example, W = 1.

[0139] In some embodiments, the at least one row index comprises at least one second row index, the at least one second row index being used to indicate the index of the target DMRS port; optionally, there is a second association relationship between the at least one second row index and the index of the row in which the index of the DMRS port associated with the PUSCH layer is located; or the index of the row in which the index of the DMRS port associated with the PUSCH layer is located is the index of the K rows before the at least one second row index, or the index of the row in which the index of the DMRS port associated with the PUSCH layer is located is the index of the K rows after the at least one second row index.

[0140] Optionally, the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table. K is a positive integer, and the value of K is indicated by the network side or is agreed by the protocol. For example, K = 1. Optionally, the row corresponding to the row index indicates at least one of the number of DMRS CDM groups without data and the number of front-load symbols corresponding to the DMRS. Optionally, the second association relationship can include at least one of the following: the target DMRS port and the DMRS port associated with the PUSCH layer correspond to at least one of the number of DMRS CDM groups without data and the number of front-load symbols, and the row corresponding to the target DMRS port is adjacent to the row corresponding to the PUSCH layer DMRS port. Optionally, in other rows in which at least one of the number of DMRS CDM groups without data and the number of front-load symbols is the same as the row corresponding to the second row index, the terminal determines or is indicated the index of the DMRS port associated with the PUSCH layer (or the first row index).

[0141] In some embodiments, the at least one row index comprises at least one second row index, the at least one second row index being used to indicate the index of the target DMRS port;

[0142] In some embodiments, the at least one row index comprises at least one second row index, the at least one second row index being used to indicate the index of the target DMRS port;

[0143] Optionally, the second association relationship is indicated by the network side or is agreed by the protocol.

[0144] Optionally, the second table is determined based on the total number of DMRS ports from M tables, where M is a positive integer. Optionally, the M tables can be agreed by protocol, or the M tables can be pre-configured by the network side.

[0145] Optionally, the terminal determines the table (i.e., the second table) associated with the target DMRS ports from the M tables agreed by protocol, wherein the M tables agreed by protocol include at least one table associated with the total number of DMRS ports; and the terminal determines the table associated with the target DMRS ports according to the total number of DMRS ports, DMRS type, DMRS symbol type, and whether to enable transform precoding. Optionally, different rows in the second table can be associated with the target DMRS ports and the DMRS ports associated with the PUSCH layer, so the second table can also be understood as a table associated with all DMRS ports (or the target DMRS ports and the DMRS ports associated with the PUSCH layer); or different rows in the second table are only associated with the target DMRS ports.

[0146] Optionally, the second table is determined based on the number of ranks or the number of target DMRS ports from N tables, where N is a positive integer.

[0147] Optionally, the N tables can be agreed by protocol, or the N tables can be pre-configured by the network side.

[0148] In this embodiment, the terminal can determine the table (i.e., the second table) associated with the target DMRS ports based on the number of ranks from the N tables agreed by protocol, wherein the N tables agreed by protocol include at least one table associated with the number of ranks; and the terminal determines the table associated with the target DMRS ports according to the number of ranks, the number of target DMRS ports, DMRS type, DMRS symbol type, and whether to enable transform precoding, or the terminal determines the table associated with the target DMRS ports according to the number of ranks, DMRS type, DMRS symbol type, and whether to enable transform precoding.

[0149] Alternatively, in this embodiment, the terminal can determine the table (i.e., the second table) associated with the target DMRS ports based on the number of target DMRS ports from the N tables agreed by protocol, wherein the N tables agreed by protocol include at least one table associated with the number of ranks; and the terminal determines the table associated with the target DMRS ports according to the number of target DMRS ports, DMRS type, DMRS symbol type, and whether to enable transform precoding.

[0150] For example, one implementation of the second table can be shown in Table 4, transform precoder is disabled, dmrs-Type = 1, maxLength = 2, rank = 2. In each row of the second table, an indication of the index of the DMRS port is included.

[0151] Table 4 Antenna port(s), transform precoder is disabled, dmrs-Type = 1, maxLength = 2, rank = 2

[0152] It should be noted that in the above Tables 2-4, the Number of DMRS CDM group(s) without data limits the number of maximum available CDM groups.

[0153] In some embodiments, the third information can be carried by third control signaling.

[0154] Optionally, the third control signaling can include, but is not limited to, at least one of the following:

[0155] RRC signaling, DCI, MAC CE.

[0156] For example, the third control signaling is DCI scheduling PUSCH, such as DCI 0-1 or DCI 0-2.

[0157] In some embodiments, the wireless communication method 200 further includes:

[0158] The terminal receives fourth information from the network side device;

[0159] The fourth information includes a target information field; wherein the target information field is used to enable the first table, or the target information field is used to enable the second table.

[0160] In this embodiment, the terminal can determine the enabled table based on the target information field, so as to determine the index of the target DMRS port based on the enabled table.

[0161] For example, the corresponding information field (i.e. the fourth information) is included in the control command, which is used to enable the terminal to select the table (such as the first table or the second table) associated with the target DMRS port; otherwise, if not enabled, the terminal selects the table related to the 'rank number'.

[0162] In some embodiments, the fourth information can be carried by fourth control signaling.

[0163] Optionally, the fourth control signaling can include, but is not limited to, at least one of the following:

[0164] RRC signaling, DCI, MAC CE.

[0165] For example, the fourth control signaling is DCI scheduling PUSCH, such as DCI 0-1 or DCI 0-2.

[0166] In some embodiments, the index of the DMRS port associated with the PUSCH layer shares the number of DMRS CDM group(s) without data with the index of the target DMRS port, or the number of DMRS CDM group(s) without data associated with the index of the DMRS port associated with the PUSCH layer is the same as the number of DMRS CDM group(s) without data associated with the index of the target DMRS port.

[0167] In the present embodiment, the index of the DMRS port associated with the PUSCH layer shares the number of DMRS CDM group(s) without data with the index of the target DMRS port, or the number of DMRS CDM group(s) without data associated with the index of the DMRS port associated with the PUSCH layer is the same as the number of DMRS CDM group(s) without data associated with the index of the target DMRS port, so that the transmission of PUSCH on the DMRS port associated with the PUSCH layer and the transmission of uplink DMRS on the target DMRS port can be realized.

[0168] In some embodiments, the index of the DMRS port associated with the PUSCH layer shares the number of front loaded symbol(s) with the index of the target DMRS port, or the number of front loaded symbol(s) associated with the index of the DMRS port associated with the PUSCH layer is the same as the number of front loaded symbol(s) associated with the index of the target DMRS port.

[0169] In the embodiment, the index of the DMRS port associated with the PUSCH layer shares the number of pre-loaded symbols with the index of the target DMRS port, or the number of pre-loaded symbols associated with the index of the DMRS port associated with the PUSCH layer is the same as the number of pre-loaded symbols associated with the index of the target DMRS port, so that the PUSCH can be transmitted on the DMRS port associated with the PUSCH layer, and the uplink DMRS can be transmitted on the target DMRS port.

[0170] In some embodiments, the wireless communication method 200 further includes:

[0171] The terminal receives fifth information from the network side device;

[0172] The fifth information is used to indicate at least one of the following:

[0173] The target DMRS port occupies an Orthogonal Frequency-Division Multiplexing (OFDM) symbol;

[0174] The target DMRS port occupies a bandwidth;

[0175] The target DMRS port occupies a CDM group;

[0176] The target DMRS port occupies a sub-band;

[0177] The target DMRS port occupies a transmission occasion;

[0178] The target DMRS port occupies a transmission power.

[0179] In the embodiment, the terminal can know at least one of the following based on the fifth information received from the network side device: the OFDM symbol occupied by the target DMRS port, the bandwidth occupied by the target DMRS port, the CDM group occupied by the target DMRS port, the sub-band occupied by the target DMRS port, the transmission occasion of the target DMRS port, and the transmission power of the target DMRS port. Therefore, the terminal can send the uplink DMRS to the network side device through the target DMRS port, and the network side device can determine the channel information (such as CSI) based on the uplink DMRS. Compared with determining the channel information (such as CSI) based on the SRS (such as periodic SRS), the resource overhead of uplink channel measurement can be reduced.

[0180] For example, the OFDM symbol occupied by the target DMRS port can be the pre-loaded symbol of the DMRS port or the additional symbol of the DMRS port.

[0181] Optionally, the target DMRS ports occupied OFDM symbols can be indicated in the form of bitmap.

[0182] For example, the transmission occasion of the target DMRS ports can be periodic transmission occasion, or the transmission occasion of the target DMRS ports can be determined based on a counter or a timer.

[0183] For example, in the case that the target DMRS ports occupied OFDM symbols are front-loaded symbols of the DMRS ports or additional symbols of the DMRS ports, the bandwidth of the target DMRS ports on the front-loaded symbols or the additional symbols can be configured separately (but can be configured in the same signaling, such as the same RRC parameter; or configured by respective signaling, such as different RRC parameters).

[0184] For example, the size of the bandwidth occupied by the target DMRS ports can be associated with the granularity of the subband, such as an integer multiple of the number of subbands.

[0185] For example, the target DMRS ports occupy a specific CDM group. Optionally, the specific CDM group is agreed by the protocol, or the specific CDM group is configured by the network side.

[0186] For example, the subband occupied by the target DMRS ports can be indicated in the form of bitmap.

[0187] Optionally, the power of each DMRS port in the target DMRS ports is equal, and the power of each DMRS port associated with the PUSCH layer is equal.

[0188] In some embodiments, there is a specific power ratio between the power of each resource element (RE) of each DMRS port of the target DMRS ports and the power of the PUSCH RE of each DMRS port associated with the PUSCH layer.

[0189] Optionally, the specific power ratio can be determined based on the following formula 1.

[0190] Further, if the unit in formula 1 is converted to decibel (dB), formula 1 can be transformed into the following formula 2.

[0191] Wherein, β DMRSThe ratio of PDSCH EPRE to DMRS EPRE is determined according to the Number of DMRS CDM groups without data, rank is the number of PUSCH rank / layer, N DMRS The total number of DMRS ports.

[0192] Optionally, the specific power ratio can be determined according to network indication, such as indicated in the control command of DMRS.

[0193] Optionally, if the target DMRS port is only transmitted on part of the DMRS symbol, i.e. only the DMRS port associated with the PUSCH layer is transmitted on symbol A (symbol A contains at least one symbol, such as frontloaded DMRS symbol(s)), and the DMRS port associated with the PUSCH layer and the target DMRS port are transmitted on symbol B (symbol B contains at least one symbol, such as additional DMRS symbol(s)).

[0194] Optionally, the power of each DMRS port associated with symbol A is equal, the power of each DMRS port associated with symbol B is equal, and the power of each port between symbol A and symbol B can be different.

[0195] Optionally, the DMRS port associated with symbol A corresponds to 'number of CDM group without data', and the DMRS port associated with symbol B corresponds to 'number of CDM group without data' can be different.

[0196] Optionally, the specific power ratio corresponding to each port of the DMRS port associated with symbol A and the PUSCH RE, and the specific power ratio corresponding to each port of the DMRS port associated with symbol B and the PUSCH RE can be different.

[0197] Optionally, considering that symbol A only transmits the DMRS associated with the PUSCH layer, in this case, the specific power ratio corresponding to symbol A is determined according to the following formula 3:

[0198] Wherein, β DMRS_A The ratio of PDSCH EPRE to DMRS EPRE is determined according to the Number of DMRS CDM groups without data.

[0199] Optionally, the specific power ratio corresponding to symbol B is determined according to the following formula 4:

[0200] wherein, β DMRS_B is 'the ratio of PDSCH EPRE to DMRS EPRE' determined by Number of DMRS CDM groups without data for the symbol B, rank is the number of PUSCH rank / layer, N DMRS is the total number of DMRS ports.

[0201] In some embodiments, the fifth information can be carried by a fifth control signaling.

[0202] Optionally, the fifth control signaling can include, but is not limited to, at least one of the following:

[0203] RRC signaling, DCI, MAC CE.

[0204] For example, the fifth control signaling is DCI, such as DCI 0-1 or DCI 0-2.

[0205] Optionally, the signaling (such as the fifth control signaling) indicated by the network can be RRC signaling, or MAC CE signaling, or DCI signaling. For example, the fifth control signaling is RRC signaling, and the network side can pre-configure the time-frequency resources occupied by the target DMRS port. For example, when the RRC parameter configures the transmission occasion of the target DMRS port, and the target DMRS port occupies the additional symbols of DMRS, then in the transmission occasion requiring uplink CSI measurement, the target DMRS port occupies the prepended symbol and at least one additional symbol, and in the transmission occasion without CSI measurement, the target DMRS port only occupies the prepended symbol, or the prepended symbol and part of the additional symbol, which can reduce the occupation overhead of DMRS.

[0206] In some embodiments, the target DMRS port is one-to-one mapped with the antenna port, such as the number of target DMRS ports is Z, the target DMRS port is one-to-one mapped to Z antenna ports, and Z is a positive integer. Optionally, the Z antenna ports are at least part of the antenna ports of the terminal.

[0207] In some embodiments, the target DMRS port corresponds to Z antenna ports, and Z is a positive integer; wherein the Z antenna ports are determined from P antenna port combinations based on the value of Z, wherein different antenna port combinations in the P antenna port combinations contain different numbers of antenna ports, and P is a positive integer.

[0208] Optionally, the P antenna port combinations can be agreed by the protocol, or the P antenna port combinations can be configured by the network side (such as pre-configured by the network side).

[0209] For example, the antenna port combination determined based on the value of Z from the P antenna port combinations can be {0,..,Z-1}, or the antenna port combination determined based on the value of Z from the P antenna port combinations can be {1000,..,Z-1000}.

[0210] In some embodiments, the target DMRS port corresponds to Z antenna ports, where Z is a positive integer; and the Z antenna ports are determined from Q antenna port combinations, where each of the Q antenna port combinations contains Z antenna ports, and the index of the antenna ports in each of the Q antenna port combinations is at least partially different.

[0211] Optionally, the Q antenna port combinations can be agreed by a protocol, or the Q antenna port combinations can be configured by a network side (e.g., pre-configured by the network side), or the Q antenna port combinations can be determined from all combinations of the protocol agreement or network configuration (or pre-configuration) according to the target DMRS port corresponding to Z antenna ports, where the number of the target DMRS ports is Z.

[0212] For example, one of the Q antenna port combinations can be randomly selected, and the Z antenna ports in the selected antenna port combination can be used as the antenna ports corresponding to the target DMRS port.

[0213] For example, one of the Q antenna port combinations can be selected according to a specific rule, and the Z antenna ports in the selected antenna port combination can be used as the antenna ports corresponding to the target DMRS port. Optionally, the specific rule is agreed by a protocol, or the specific rule is indicated by a network side.

[0214] For example, one of the Q antenna port combinations can be selected based on an indication from a network side, and the Z antenna ports in the selected antenna port combination can be used as the antenna ports corresponding to the target DMRS port.

[0215] In some embodiments, the Z antenna ports are determined from R antenna port combinations, where each of the R antenna port combinations contains different number of antenna ports or different index of antenna ports.

[0216] In some embodiments, the index of the Z antenna ports is determined based on an indication from a network side. For example, the network side directly indicates the index of the Z antenna ports.

[0217] In some embodiments, the target DMRS port corresponds to Z antenna ports, where Z is a positive integer; and the Z antenna ports are the antenna ports corresponding to a specific row in a precoding matrix.

[0218] Optionally, the specific behavior is one of the following:

[0219] a row with all values being 0;

[0220] a row not one-to-one mapped to a layer;

[0221] a row not one-to-one mapped to a layer and a row of a precoding matrix composed of layers not having full rank.

[0222] Optionally, the specific behavior is based on a row corresponding to an antenna port channel recoverable by a channel corresponding to a layer, or the specific behavior is based on a row other than a row corresponding to an antenna port channel unrecoverable by a channel corresponding to a layer.

[0223] In some embodiments, the target DMRS port and the antenna port are one-to-one mapped in an order of indexes from small to large; or the target DMRS port and the antenna port are one-to-one mapped in an order of indexes from large to small.

[0224] In some embodiments, the target DMRS port and the antenna port are one-to-one mapped based on a mapping manner indicated by a network side.

[0225] In some embodiments, the target DMRS port and the antenna port are one-to-one mapped based on a first precoding matrix, wherein a row of the first precoding matrix corresponds to an antenna port, and a column of the first precoding matrix corresponds to the target DMRS port.

[0226] Specifically, the first precoding matrix is different from a precoding matrix associated with a PUSCH layer. The antenna ports corresponding to the rows of the first precoding matrix are respectively the antenna ports with indexes 0 to the number of rows-1.

[0227] In some embodiments, the wireless communication method 200 further includes:

[0228] canceling, by the terminal, SRS transmission on the target antenna port;

[0229] wherein the target DMRS port and the SRS on the target antenna port are located in different OFDM symbols, and the target DMRS port and the SRS on the target antenna port satisfy a first time interval.

[0230] In this embodiment, the uplink DMRS can be used to replace the function of a part of the SRS (such as determining channel information (such as CSI)), and when the uplink DMRS is transmitted, the corresponding SRS transmission can be canceled, thereby reducing the SRS resource overhead.

[0231] Optionally, the target DMRS port is located before the SRS on the target antenna port, or the target DMRS port is located after the SRS on the target antenna port.

[0232] In the embodiment, the target DMRS port and the SRS on the target antenna port are located in different OFDM symbols, which can avoid collision between DMRS transmission or data transmission and SRS transmission. The target DMRS port and the SRS on the target antenna port satisfy a first time interval, so that the timeliness of the SRS cancelled by the terminal can be guaranteed. Specifically, in the case that the target DMRS port and the SRS on the target antenna port satisfy the first time interval, the uplink DMRS sent by the terminal through the target DMRS port can replace the function of part of the SRS, and after exceeding the first time interval, the uplink DMRS sent on the target DMRS port cannot replace the function of the SRS on the target antenna port.

[0233] Optionally, the first time interval can be indicated by the network side, or the first time interval can be agreed by the protocol, or the first time interval can be determined based on the capability of the terminal.

[0234] Optionally, the first time interval is not less than a first threshold, and / or the first time interval is not greater than a second threshold. Optionally, the first threshold is associated with at least one of DCI processing and PUSCH preparation time; and / or the second threshold is associated with at least one of DCI processing and PUSCH preparation time.

[0235] In some embodiments, the target antenna port is part or all of the antenna ports corresponding to the column of the precoding matrix in which only one non-zero value exists, or the target antenna port is part or all of the antenna ports corresponding to the target DMRS port.

[0236] For example, one example of the precoding matrix can be as follows:

[0237] Wherein, the 2nd column and the 3rd column of the precoding matrix are columns in which only one non-zero value exists, the target DMRS port is the DMRS port corresponding to the 2nd column and the 3rd column of the precoding matrix, and corresponds to SRS port 1 and SRS port 3 respectively, and the target antenna port is part or all of the antenna ports corresponding to the column in which only one non-zero value exists, such as the target antenna port is SRS port 1 and SRS port 3. In other words, the DMRS port of the 2nd column and the 3rd column of the precoding matrix can be considered as a bare channel transmission. It should be understood that the SRS port index starts from 0.

[0238] For example, another example of the precoding matrix can be as follows:

[0239] wherein each column of the precoding matrix is a column with only one non-zero value, the target DMRS port is a DMRS port corresponding to each column of the precoding matrix, and corresponds to SRS port 0 to SRS port 3 respectively, and the target antenna port is part or all of the antenna ports corresponding to the column with only one non-zero value, such as the target antenna port being SRS port 0 to SRS port 3, in other words, the DMRS port of each column of the precoding matrix can be considered as a bare channel transmission. It should be understood that the SRS port index starts from 0.

[0240] In some embodiments, the terminal cancels the SRS transmission on the target antenna port, comprising:

[0241] In the case that a third association relationship is satisfied between the target DMRS port and the target antenna port, the terminal cancels the SRS transmission on the target antenna port;

[0242] wherein the third association relationship comprises at least one of the following:

[0243] The target DMRS port and at least part of the target antenna ports are the same ports;

[0244] The target DMRS port is associated with a second precoding matrix, wherein the channel of at least part of the target antenna ports is determined based on the second precoding matrix and the channel of the target DMRS port.

[0245] In this embodiment, in the case that a third association relationship is satisfied between the target DMRS port and the target antenna port, the terminal cancels the SRS transmission on the target antenna port, so that the channel of at least part of the target antenna ports can be obtained by measuring the target DMRS port.

[0246] Specifically, the network side device can obtain the channel of at least part of the target antenna ports based on the second precoding matrix and the channel of the target DMRS port.

[0247] Optionally, the second precoding matrix is full rank. For example, based on the channel (such as CSI) of the target DMRS port combined with the second precoding matrix, the channel (such as CSI) of the target antenna port can be recovered.

[0248] For example, an example of the second precoding matrix V can be a 4*4 precoding matrix, and specifically, the channel H_srs of the target antenna port can be recovered by combining the channel H_dmrs measured on the target DMRS port with the second precoding matrix V. H_dmrs = H_srs * V

[0249] Optionally, the third association relationship is indicated by a network side, or the third association relationship is agreed by a protocol.

[0250] In some embodiments, the wireless communication method 200 further includes:

[0251] The terminal receives sixth information from the network side device;

[0252] The sixth information includes at least one of the following:

[0253] The first indication information is used to indicate to activate the terminal to cancel SRS transmission on the target antenna port;

[0254] The second indication information is used to indicate the granularity of canceling SRS transmission;

[0255] The third indication information is used to indicate the antenna port of canceling SRS transmission;

[0256] The fourth indication information is used to indicate the bandwidth of canceling SRS transmission.

[0257] In this embodiment, the terminal can know at least one of the following based on the sixth information received from the network side device: activating the terminal to cancel SRS transmission on the target antenna port, the granularity of canceling SRS transmission, the antenna port of canceling SRS transmission, and the bandwidth of canceling SRS transmission. Therefore, the terminal can cancel SRS transmission on the target antenna port.

[0258] Specifically, after the terminal receives the sixth information, the terminal can cancel SRS transmission on the target antenna port based on the sixth information.

[0259] Optionally, the first indication information can indicate to enable identification, i.e., to indicate to enable identification, the terminal cancels SRS transmission on the target antenna port; if there is no indication to enable identification, even if the third association relationship is met between the target DMRS port and the target antenna port, SRS transmission on the target antenna port is not canceled.

[0260] Optionally, the granularity of canceling SRS transmission indicated by the second indication information includes one of the following: partial antenna port, all antenna ports, partial SRS bandwidth, and all SRS bandwidth.

[0261] Optionally, the partial SRS bandwidth is the SRS bandwidth consistent with the DMRS frequency domain range.

[0262] Optionally, the partial SRS bandwidth is indicated by a network side.

[0263] Exemplarily, the SRS transmission cancellation in granularity of antenna port comprises at least one of the following:

[0264] canceling the SRS transmission on part of the antenna ports, wherein the part of the antenna ports are antenna ports having a third association relationship with the target DMRS port, or the part of the antenna ports are antenna ports indicated by the network side; optionally, the SRS transmission of only the antenna ports satisfying the third association relationship is canceled;

[0265] canceling the SRS transmission on all the antenna ports; optionally, the SRS transmission on all the antenna ports is canceled even if part of the antenna ports are antenna ports having a third association relationship with the target DMRS port.

[0266] Exemplarily, the SRS transmission cancellation in granularity of SRS bandwidth comprises at least one of the following:

[0267] canceling part of the SRS bandwidth transmission, wherein the part of the SRS bandwidth is SRS bandwidth consistent with the DMRS frequency domain range, or the part of the SRS bandwidth is SRS bandwidth indicated by the network side;

[0268] canceling all the SRS bandwidth transmission.

[0269] In some embodiments, the sixth information can be carried by sixth control signaling.

[0270] Optionally, the sixth control signaling can comprise but is not limited to at least one of the following:

[0271] RRC signaling, DCI, MAC CE.

[0272] Exemplarily, the sixth control signaling is a control command corresponding to the DMRS or the SRS, for example, DCI scheduling PUSCH, such as DCI 0-1 or DCI 0-2.

[0273] In some embodiments, the first information, the second information, the third information, the fourth information, the fifth information, and the sixth information described in the embodiments of the present application can be located in the same signaling or different signaling; or at least part of the first information, the second information, the third information, the fourth information, the fifth information, and the sixth information described in the embodiments of the present application are located in the same signaling; or at least part of the first information, the second information, the third information, the fourth information, the fifth information, and the sixth information described in the embodiments of the present application are located in different signaling.

[0274] Therefore, in the embodiment of the present application, the terminal sends the uplink DMRS to the network side device through the target DMRS port; wherein the target DMRS port satisfies at least one of the following: one-to-one mapping between the target DMRS port and the antenna port, the target DMRS port is not associated with PUSCH transmission, the mapping between the target DMRS port and the antenna port uses a precoding method different from the PUSCH transmission, and the target DMRS port is not precoded. Specifically, the network side device can determine the channel information (such as CSI) based on the uplink DMRS. Compared with the measurement result of the SRS (such as the periodic SRS) for determining the channel information (such as CSI), the DMRS can be used to provide the uplink channel measurement function in the case of a large SRS period, reduce the SRS resource overhead, and reduce the resource overhead of the uplink channel measurement.

[0275] The technical solutions of the present application are described in detail below through specific embodiments.

[0276] Embodiment 1 takes the following scheme as an example: the terminal determines the first table associated with the target DMRS port according to the total number of DMRS ports; and the terminal determines the index of all DMRS ports according to the target row index of the first table indicated by the second information; further, the terminal determines the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer from the index of all DMRS ports. Optionally, the second information can be carried by the second control signaling. Optionally, the second control signaling can include but is not limited to at least one of the following: RRC signaling, DCI, and MAC CE.

[0277] For example, the second control signaling is the DCI for scheduling the PUSCH, such as DCI 0-1 or DCI 0-2.

[0278] Specifically, embodiment 1 can include part or all of the steps in S1-1 to S1-3.

[0279] S1-1. The terminal determines the first table associated with the target DMRS port from the multiple tables agreed by the protocol. Among the multiple tables agreed by the protocol, at least one table is associated with the total number of DMRS ports; the terminal determines the first table associated with the target DMRS port according to at least one of the total number of DMRS ports, the DMRS type, the DMRS symbol type, and whether to enable transform precoding.

[0280] For example, the first table can be shown in Table 2 as above, which is related to 'transform precoder is disabled', 'dmrs-Type = 1','maxLength = 2', 'Number of DMRS port = 4'. Specifically, the Table 2 can be determined based on at least one of 'transform precoder is disabled', 'dmrs-Type = 1','maxLength = 2', 'Number of DMRS port = 4'.

[0281] For example, the first table can be shown in Table 3 as above, which is related to 'transform precoder is disabled', 'dmrs-Type = 2','maxLength = 2', 'Number of DMRS port = 2'. Specifically, the Table 3 can be determined based on at least one of 'transform precoder is disabled', 'dmrs-Type = 2','maxLength = 2', 'Number of DMRS port = 2'.

[0282] Further, the above-mentioned Table 2 and Table 3 are composed of multiple rows, each of which contains at least one of DMRS port(s), Number of DMRS CDM group(s) without data, Number of front-load symbols. Optionally, the DMRS port(s) of each row can be (pre-)configured by the network (e.g. RRC) or agreed by the protocol.

[0283] Optionally, the transform precoder is disabled, the DMRS type, the DMRS symbol type, etc. can be indicated by a high layer parameter (e.g. RRC), and the total number of DMRS ports can be indicated by a physical layer parameter (DCI). According to these parameters, the UE determines the first table associated with the target DMRS port.

[0284] In another embodiment, the table is composed of multiple rows, each of which contains at least one of the following: DMRS port index, number of front-load symbols.

[0285] Optionally, the total number of DMRS ports can be directly indicated by the network side, such as in the DCI scheduling PUSCH; or the total number of DMRS ports can be determined according to the rank number indicated by the network side, combined with the target DMRS port number indicated by the network side, i.e. total number of DMRS ports = rank number + target DMRS port number. Wherein, the rank number corresponds to the number of PUSCH layers.

[0286] Optionally, a corresponding field is included in the second control signaling for enabling the terminal to select the table related to the total number of DMRS ports (i.e. select the table related to the total number of DMRS ports); otherwise, if not enabled, the terminal selects the table related to the rank number (select the table related to the rank, such as the table title: Antenna port(s), transform precoder is xx, dmrs-Type = xx, maxLength = y, rank = y).

[0287] S1-2. The terminal determines the index of all DMRS ports according to the target row index of the first table indicated by the second information. The second information can be carried by the second control signaling. Optionally, the second control signaling can be DCI, such as DCI scheduling PUSCH. The target row index of the first table is indicated according to the 'antenna port(s)' field or other specific fields in the second control signaling. The index of all DMRS ports includes the index of DMRS ports associated with the PUSCH layer and the index of the target DMRS port (also known as additional DMRS port index, or DMRS port index independent of the PUSCH layer). Taking the row with index = 1 in Table 2 as an example, the terminal determines the index of all DMRS ports as {0, 1, 4, 5} according to the indication of the network side.

[0288] S1-3. From the index of all DMRS ports, determine the index of DMRS ports associated with the PUSCH layer and the index of the target DMRS port. That is, from the index of all DMRS ports in a row of Table 2 or Table 3, determine the index of DMRS ports associated with the PUSCH layer and the index of the target DMRS port.

[0289] One way is that in the Index of all DMRS ports corresponding to a row of the first table, the first X values are the DMRS port Indexes associated with the PUSCH layer, and the last Y values are the DMRS port Indexes corresponding to the target DMRS port; wherein X+Y=the number of all DMRS port indexes, X=the rank number, and Y=the number of target DMRS ports. For example, in the above table 2, assuming that the target index is 1, among the all DMRS port indexes {0, 1, 4, 5} determined based on the target index, assuming that the rank number is 2, then the DMRS port indexes {0, 1} correspond to the DMRS port indexes associated with the PUSCH layer, and the DMRS port indexes {4, 5} correspond to the target DMRS port indexes.

[0290] Another way is that in the Index of all DMRS ports corresponding to a row of the first table, the odd positions are the DMRS port Indexes associated with the PUSCH layer, and the even positions are the DMRS port Indexes corresponding to the target DMRS port. For example, in the above table 2, assuming that the target index is 1, among the all DMRS port indexes {0, 1, 4, 5} determined based on the target index, assuming that the rank number is 2, then the DMRS port indexes {0, 4} correspond to the DMRS port indexes associated with the PUSCH layer, and the DMRS port indexes {1, 5} correspond to the target DMRS port indexes.

[0291] Another way is that the terminal determines the DMRS port index range (i.e., the DMRS ports associated with the PUSCH layer and the target DMRS port are located in different DMRS port index ranges) according to the network (pre-) configuration (such as RRC) or protocol agreement, such as the ports satisfying the DMRS port range 1 (such as 0~X-1) are the DMRS indexes associated with the PUSCH layer, and the ports satisfying the DMRS port range 2 (such as X~Y) are the target DMRS ports.

[0292] Another way is that the terminal determines the CDM group range (i.e., the DMRS ports associated with the PUSCH layer and the target DMRS port are located in different CDM groups) according to the network (pre-) configuration (such as RRC) or protocol agreement, such as the port indexes located in the CDM group n correspond to the DMRS indexes associated with the PUSCH layer, and the port indexes located in the CDM group m correspond to the target DMRS ports.

[0293] Embodiment 2, for example, the terminal determines the second table associated with the target DMRS port according to the rank number; and the terminal determines the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer according to at least one row index of the second table indicated by the third information. Wherein the index of the DMRS port associated with the PUSCH layer and the index of the target DMRS port correspond to different rows of the second table respectively. Optionally, the third information can be carried by the third control signaling. Optionally, the third control signaling can include but is not limited to at least one of the following: RRC signaling, DCI, MAC CE. Exemplarily, the third control signaling is the DCI scheduling the PUSCH, such as DCI 0-1 or DCI 0-2.

[0294] Specifically, embodiment 2 can include part or all of the steps in S2-1 to S2-2.

[0295] S2-1. The terminal is configured to determine the second table associated with the target DMRS port from a plurality of tables agreed by the protocol. Wherein the plurality of tables agreed by the protocol include at least one table associated with the rank number; the terminal determines the second table associated with the target DMRS port according to the rank number, the DMRS type, the DMRS symbol type, whether to enable the transform precoding, etc. According to at least 2 rows in the second table, the index of the DMRS port associated with the PUSCH layer and the index of the target DMRS port are determined.

[0296] Exemplarily, the second table can be shown in Table 4 as described above, Table 4 is related to 'whether to enable transform precoder', 'DMRS type (dmrs-Type=1)', 'DMRS symbol type (maxLength=2)', 'rank number (rank=2)'. Further, the second table is composed of multiple rows, and each row contains at least one of the following: DMRS port index (DMRS port(s)), number of DMRS CDM groups without data (Number of DMRS CDM group(s) without data), number of front-load symbols (Number of front-load symbols).

[0297] Optionally, the DMRS port(s) of each row is agreed by protocol or configured by network. Optionally, whether to enable transform precoding, DMRS type, DMRS symbol type can be indicated by higher layer parameter (e.g. RRC), and the rank number can be indicated by lower layer parameter (DCI). According to these parameters, the terminal determines the second table associated with the target DMRS port. Optionally, the second table is composed of multiple rows, and each row contains at least one of the DMRS port index (DMRS port(s)), the number of front-load symbols (Number of front-load symbols).

[0298] S2-2. The terminal determines the index of the DMRS port associated with the PUSCH layer and the index of the target DMRS port according to at least one row index of the indicated second table.

[0299] One way: explicitly indicate at least 2 row indexes of the second table in the third control signaling, respectively corresponding to the index of the DMRS port associated with the PUSCH layer and the index of the target DMRS port, wherein one row index corresponds to the index of the DMRS port associated with the PUSCH layer, and the remaining row indexes correspond to the index of the target DMRS port. Optionally, in the indicated at least 2 row indexes of the second table, the row index corresponding to the port index with the minimum or maximum value is the index of the DMRS port associated with the PUSCH layer, or the bit indicating the row index at the front or back of the indicated field indicates the DMRS port index corresponding to the row index as the index of the DMRS port associated with the PUSCH layer; the remaining row indexes correspond to the index of the target DMRS port. For example: for the second table, the network side indicates 2 row indexes, such as the row with index = 3 and the row with index = 4 in Table 4. Among them, the DMRS port index corresponding to the row with index = 3 is taken as the index of the DMRS port associated with the PUSCH layer (such as {0, 1}), and the DMRS port index corresponding to the row with index = 4 is taken as the index of the target DMRS port (such as {2, 3}). Or, the network side indicates 3 row indexes, such as the row with index = 3 and the rows with indexes = 4, 5 in Table 4. Among them, the DMRS port index corresponding to the row with index = 3 is taken as the index of the DMRS port associated with the PUSCH layer (such as {0, 1}), and the DMRS port index corresponding to the rows with indexes = 4, 5 is taken as the index of the DMRS port associated with the target DMRS port (such as {2, 3}, {4, 5}).

[0300] Optionally, the number of rows of the second table can be indicated by the network side or agreed by the protocol. For example, according to the indication of the network side, the UE determines the total number of DMRS ports, and then the number of rows of the indicated second table = ceil(DMRS port total number / rank), or the number of rows of the indicated second table = DMRS port total number / rank; or according to the indication of the network side, the UE determines the number of target DMRS ports, and then the number of rows of the indicated second table = ceil((rank + target DMRS port number) / rank), or the number of rows of the indicated second table = (rank + target DMRS port number) / rank; wherein ceil is the ceiling.

[0301] Optionally, the indicated different number of table rows correspond to different bit widths, i.e., the bit width is related to the number of rows of the second table, or the bit width is related to the total number of DMRS ports, the target number of DMRS ports, or the rank number. Optionally, the indication of the multiple table row indexes can be indicated in a joint coding manner, or can be indicated separately.

[0302] Another way: in the third control signaling, explicitly indicate a row index of the second table, which corresponds to the index of the DMRS port associated with the PUSCH layer; the at least one row in which the index of the target DMRS port is located has a certain association relationship with the row in which the index of the DMRS port associated with the PUSCH layer is located. Optionally, the association relationship is adjacent, or after the row related to the PUSCH layer and adjacent. The indexes of the DMRS ports corresponding to the next n rows or the previous n rows of the row indicated in the third control signaling are determined as the indexes of the target DMRS ports. Optionally, n is greater than or equal to 1; it can be agreed by the protocol or indicated by the network. For example, for the above table 4, the network side indicates that the row index = 3, the DMRS port index corresponding to the row index = 3 is the index of the DMRS port associated with the PUSCH layer; the UE determines the DMRS port index of the next row index = 4 as the index of the target DMRS port. For example, for the above table 4, the network side indicates the row index = 7, then the DMRS port index corresponding to the row index = 7 is the index of the DMRS port associated with the PUSCH layer, such as {0, 1}; the network side indicates that the DMRS indexes corresponding to the next n = 4 rows (i.e., indexes = 8, 9, 10, 11) after the row index = 7 are the indexes of the target DMRS ports, then the indexes of the target DMRS ports can be taken as {2, 3, 4, 5, 6, 7, 8, 9}.

[0303] Optionally, the 'Number of DMRS CDM group(s) without data' associated with the index of the DMRS port associated with the PUSCH layer and the index of the target DMRS port are shared; or the 'Number of DMRS CDM group(s) without data' value associated with the index of the DMRS port associated with the PUSCH layer is the same as the 'Number of DMRS CDM group(s) without data' value associated with the index of the target DMRS port. Optionally, the 'Number of DMRS CDM group(s) without data' is not less than the number of CDM groups occupied by all DMRS ports.

[0304] Optionally, the 'Number of front-load symbols' associated with the index of the DMRS port associated with the PUSCH layer and the index of the target DMRS port are shared; or the 'Number of front-load symbols' value associated with the index of the DMRS port associated with the PUSCH layer is the same as the 'Number of front-load symbols' value associated with the index of the target DMRS port.

[0305] Optionally, after determining the row index associated with the DMRS port associated with the PUSCH layer, the 'Number of DMRS CDM group(s) without data' and the 'Number of front-load symbols' in the row are further determined, and the target DMRS port is considered to have the same 'Number of DMRS CDM group(s) without data' and 'Number of front-load symbols', then the terminal can determine or be instructed the row index corresponding to the target DMRS port in the row that meets the 'Number of DMRS CDM group(s) without data' and the 'Number of front-load symbols'.

[0306] Optionally, the total number of DMRS ports or the number of target DMRS ports is an integer multiple of the rank number.

[0307] Optionally, the total number of DMRS ports or the target number of DMRS ports is an integer multiple of the rank number. Then, in the multiple rows corresponding to all DMRS ports, only part of the DMRS indexes in one row belong to the indicated DMRS ports. For example, the DMRS ports correspond to K rows, the number of DMRS port indexes corresponding to each row is the rank number, the total number of DMRS ports is P, and then the DMRS port indexes in one row are only the first mod(P, rank) + 1 indexes belong to the indicated DMRS ports. Further, the row can be indicated by the network or agreed by the protocol, such as the last row, the first row, the indicated row, or a specific row in the multiple rows corresponding to all DMRS ports.

[0308] Optionally, the third control signaling includes a corresponding field for enabling the terminal to select at least one row in the second table to determine the index of the target DMRS port; otherwise, if not enabled, the terminal only determines the index of the DMRS port associated with the PUSCH layer.

[0309] Optionally, the terminal can determine the second table associated with the target DMRS port from multiple tables agreed by the protocol. Among the multiple tables agreed by the protocol, at least one table is associated with the target number of DMRS ports; the terminal determines the second table associated with the target DMRS port according to the target number of DMRS ports, the DMRS type, the DMRS symbol type, and whether to enable the transform precoding, etc. According to a row in the second table, the index of the target DMRS port is determined.

[0310] The wireless communication method provided in the embodiments of the present application can be executed by a wireless communication device. In the embodiments of the present application, the wireless communication device is taken as an example to illustrate the wireless communication device provided in the embodiments of the present application.

[0311] The wireless communication device provided in the embodiments of the present application can be a communication device or a component in the communication device, such as a chip. The communication device can be a terminal, a network side device, a server, or the like. For example, the terminal can include but is not limited to the types of the terminal 11 listed above, the network side device can include but is not limited to the types of the network side device 12 listed above, and the embodiments of the present application are not limited in this regard.

[0312] The wireless communication device includes a receiving module, a sending module and a processing module. The receiving module, the sending module and the processing module can be implemented by software or by hardware. When implemented by hardware, the processing module can be implemented by a processor, which can include a general-purpose processor, a special-purpose processor, etc., such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA) or other programmable logic device, a gate circuit, a transistor, a discrete hardware component, etc. The receiving module and the sending module can be implemented by a communication interface, which can include one or more of a transceiver, a pin, a circuit, a bus, a radio frequency unit, etc.

[0313] Specifically, referring to FIG. 5, when the wireless communication device is a terminal or a component in the terminal, the wireless communication device 300 includes:

[0314] The sending module 301 is configured to send, to a network side device, an uplink demodulation reference signal (DMRS) through a target DMRS port.

[0315] The target DMRS port satisfies at least one of the following conditions:

[0316] The target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from that of the PUSCH transmission, and the target DMRS port is not precoded.

[0317] In some embodiments, the target DMRS port is a DMRS port other than a DMRS port associated with a PUSCH layer among all DMRS ports; and / or,

[0318] The number of the target DMRS ports is the difference between the total number of DMRS ports and the number of ranks (Rank).

[0319] The target DMRS port is a DMRS port corresponding to a column with only one non-zero value in a precoding matrix.

[0320] In some embodiments, the wireless communication apparatus 300 further comprises:

[0321] a receiving module 302, configured to receive first information from the network-side device;

[0322] wherein the first information is used to indicate at least one of:

[0323] the number of the target DMRS ports;

[0324] the index of the target DMRS ports;

[0325] the total number of DMRS ports;

[0326] the index of all DMRS ports;

[0327] the index of DMRS ports associated with a PUSCH layer.

[0328] In some embodiments, the wireless communication apparatus 300 further comprises:

[0329] a receiving module 302, configured to receive second information from the network-side device;

[0330] wherein the second information is used to indicate a target row index of a first table;

[0331] wherein the first table is a table associated with the target DMRS ports, and the target row index is used to indicate the index of all DMRS ports, the index of all DMRS ports including the index of the target DMRS ports and the index of DMRS ports associated with a PUSCH layer.

[0332] In some embodiments, the first X DMRS ports in the index of all DMRS ports indicated by the target row index are the index of DMRS ports associated with a PUSCH layer, and the last Y DMRS ports in the index of all DMRS ports indicated by the target row index are the index of the target DMRS ports, wherein X is a rank number, Y is the number of the target DMRS ports, the sum of X and Y is equal to the total number of DMRS ports, and X and Y are positive integers.

[0333] or,

[0334] The index of the odd bit DMRS port in the indexes of the total DMRS ports indicated by the target row index is the index of the DMRS port associated with the PUSCH layer, and the index of the even bit DMRS port in the indexes of the total DMRS ports indicated by the target row index is the index of the target DMRS port; or the index of the even bit DMRS port in the indexes of the total DMRS ports indicated by the target row index is the index of the DMRS port associated with the PUSCH layer, and the index of the odd bit DMRS port in the indexes of the total DMRS ports indicated by the target row index is the index of the target DMRS port.

[0335] In some embodiments, the wireless communication device 300 further includes:

[0336] The receiving module 302 is configured to receive third information from the network side device;

[0337] The third information is used to indicate at least one row index of a second table.

[0338] The second table is a table associated with the target DMRS port, and the at least one row index is used to indicate at least one of the following: the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer.

[0339] In some embodiments, the at least one row index includes a first row index and at least one second row index; the first row index is used to indicate the index of the DMRS port associated with the PUSCH layer, and the at least one second row index is used to indicate the index of the target DMRS port; the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table.

[0340] Alternatively,

[0341] The at least one row index includes a first row index, and the first row index is used to indicate the index of the DMRS port associated with the PUSCH layer; there is a first association relationship between the first row index and the index of the row in which the index of the target DMRS port is located; or the index of the row in which the index of the target DMRS port is located is the index of the W rows after the first row index, or the index of the row in which the index of the target DMRS port is located is the index of the W rows before the first row index, W being a positive integer; the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table.

[0342] Alternatively,

[0343] The at least one row index includes at least one second row index, and the at least one second row index is used to indicate the index of the target DMRS port; wherein a second association relationship exists between the at least one second row index and the index of the row in which the index of the DMRS port associated with the PUSCH layer is located; or the index of the row in which the index of the DMRS port associated with the PUSCH layer is located is the index of the K rows before the at least one second row index, or the index of the row in which the index of the DMRS port associated with the PUSCH layer is located is the index of the K rows after the at least one second row index, K being a positive integer; wherein the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table.

[0344] Or,

[0345] The at least one row index includes at least one second row index, and the at least one second row index is used to indicate the index of the target DMRS port; wherein the second table is only used for the indication of the target DMRS port.

[0346] In some embodiments, the wireless communication device 300 further includes:

[0347] The receiving module 302 is configured to receive fourth information from the network side device.

[0348] The fourth information includes a target information field.

[0349] The target information field is used to enable a first table, or the target information field is used to enable a second table.

[0350] The first table is a table associated with the target DMRS port, and a target row index in the first table is used to indicate the index of all DMRS ports, and the index of all DMRS ports includes the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer.

[0351] The second table is a table associated with the target DMRS port, and at least one row index in the second table is used to indicate at least one of the following: the index of the target DMRS port, and the index of the DMRS port associated with the PUSCH layer.

[0352] In some embodiments, the index of the DMRS port associated with the PUSCH layer shares a number of data-free DMRS code division multiplexing (CDM) groups with the index of the target DMRS port, or the number of data-free DMRS CDM groups associated with the index of the DMRS port associated with the PUSCH layer is the same as the number of data-free DMRS CDM groups associated with the index of the target DMRS port.

[0353] and / or,

[0354] The index of the DMRS port associated with the PUSCH layer shares a number of pre-loaded symbols with the index of the target DMRS port, or the number of pre-loaded symbols associated with the index of the DMRS port associated with the PUSCH layer is the same as the number of pre-loaded symbols associated with the index of the target DMRS port.

[0355] In some embodiments, the first table is determined based on a total number of DMRS ports from M tables, where M is a positive integer.

[0356] In some embodiments, the second table is determined based on a total number of DMRS ports from M tables, where M is a positive integer, or the second table is determined based on a rank number or the number of target DMRS ports from N tables, where N is a positive integer.

[0357] In some embodiments, the wireless communication device 300 further includes:

[0358] The receiving module 302 is configured to receive fifth information from the network side device.

[0359] The fifth information is used to indicate at least one of the following:

[0360] The target DMRS port occupies an orthogonal frequency division multiplexing (OFDM) symbol.

[0361] The target DMRS port occupies a bandwidth.

[0362] The target DMRS port occupies a CDM group.

[0363] The target DMRS port occupies a sub-band.

[0364] The target DMRS port occupies a transmission occasion.

[0365] The target DMRS port occupies a transmission power.

[0366] In some embodiments, the target DMRS port corresponds to Z antenna ports, where Z is a positive integer.

[0367] The Z antenna ports are determined from P antenna port combinations, wherein different antenna port combinations in the P antenna port combinations contain different numbers of antenna ports, and P is a positive integer.

[0368] Alternatively,

[0369] The Z antenna ports are determined from Q antenna port combinations, wherein each antenna port combination in the Q antenna port combinations contains Z antenna ports, and each antenna port combination in the Q antenna port combinations contains at least partially different indexes of the antenna ports.

[0370] Alternatively,

[0371] The Z antenna ports are determined from R antenna port combinations, wherein each antenna port combination in the R antenna port combinations contains different numbers of antenna ports or different indexes of the antenna ports.

[0372] Alternatively,

[0373] The indexes of the Z antenna ports are determined based on network side indication.

[0374] Alternatively,

[0375] The Z antenna ports are antenna ports corresponding to specific rows in a precoding matrix.

[0376] In some embodiments, the specific behavior is one of the following:

[0377] A row with all values being 0;

[0378] A row that is not one-to-one mapped with a layer;

[0379] A row that is not one-to-one mapped with a layer in a precoding matrix that is not row full rank with a layer.

[0380] In some embodiments, the target DMRS ports and the antenna ports are one-to-one mapped in ascending order of indexes; or,

[0381] The target DMRS ports and the antenna ports are one-to-one mapped in descending order of indexes; or,

[0382] The target DMRS ports and the antenna ports are one-to-one mapped based on network side indication; or,

[0383] The target DMRS ports and the antenna ports are one-to-one mapped based on a first precoding matrix, wherein rows of the first precoding matrix correspond to antenna ports, and columns of the first precoding matrix correspond to the target DMRS ports.

[0384] In some embodiments, the wireless communication apparatus 300 further includes:

[0385] a processing module 303 configured to cancel SRS transmission on the target antenna port.

[0386] wherein the target DMRS port and the SRS on the target antenna port are located in different OFDM symbols, and a first time interval is satisfied between the target DMRS port and the SRS on the target antenna port.

[0387] In some embodiments, the target antenna port is part or all of the antenna ports corresponding to the column with only one non-zero value in the precoding matrix, or the target antenna port is part or all of the antenna ports corresponding to the target DMRS port.

[0388] In some embodiments, the processing module 303 is specifically configured to:

[0389] cancel SRS transmission on the target antenna port in the case that a third association relationship is satisfied between the target DMRS port and the target antenna port.

[0390] wherein the third association relationship includes at least one of the following:

[0391] the target DMRS port and at least part of the target antenna ports are the same port;

[0392] the target DMRS port is associated with a second precoding matrix, and the channel of at least part of the target antenna ports is determined based on the second precoding matrix and the channel of the target DMRS port.

[0393] In some embodiments, the wireless communication apparatus 300 further includes:

[0394] a receiving module 302 configured to receive sixth information from the network side device.

[0395] wherein the sixth information includes at least one of the following:

[0396] first indication information for indicating to activate the wireless communication apparatus 300 to cancel SRS transmission on the target antenna port;

[0397] second indication information for indicating the granularity of canceling SRS transmission;

[0398] third indication information for indicating the antenna port of canceling SRS transmission;

[0399] fourth indication information for indicating the bandwidth of canceling SRS transmission.

[0400] In some embodiments, the granularity of the SRS transmission cancellation indicated by the second indication information comprises one of the following: partial antenna ports, all antenna ports, partial SRS bandwidth, and all SRS bandwidth.

[0401] In some embodiments, the partial SRS bandwidth is a SRS bandwidth consistent with a DMRS frequency domain range; or,

[0402] The partial SRS bandwidth is indicated by a network side.

[0403] Specifically, referring to FIG. 6, when the wireless communication device is a network side device or a component in the network side device, the wireless communication device 400 comprises:

[0404] A receiving module 401 configured to receive an uplink DMRS transmitted by a terminal through a target DMRS port.

[0405] A processing module 402 configured to determine channel information according to the uplink DMRS.

[0406] The target DMRS port satisfies at least one of the following:

[0407] The target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a PUSCH transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from the PUSCH transmission, and the target DMRS port is not precoded.

[0408] In some embodiments, the target DMRS port is a DMRS port other than a DMRS port associated with a PUSCH layer among all DMRS ports; and / or,

[0409] The number of target DMRS ports is the difference between the total number of DMRS ports and the Rank number; and / or,

[0410] The target DMRS port is a DMRS port corresponding to a column with only one non-zero value in a precoding matrix.

[0411] In some embodiments, the wireless communication device 400 further comprises:

[0412] A sending module 403 configured to send first information to the terminal.

[0413] The first information is used to indicate at least one of the following:

[0414] The number of target DMRS ports.

[0415] an index of the target DMRS port;

[0416] a total number of DMRS ports;

[0417] an index of all DMRS ports;

[0418] an index of DMRS ports associated with a PUSCH layer.

[0419] In some embodiments, the wireless communication device 400 further includes:

[0420] a sending module 403 configured to send second information to the terminal;

[0421] wherein the second information is used to indicate a target row index of a first table;

[0422] wherein the first table is a table associated with the target DMRS port, and the target row index is used to indicate an index of all DMRS ports, the index of all DMRS ports including an index of the target DMRS port and an index of DMRS ports associated with a PUSCH layer.

[0423] In some embodiments, the first X DMRS ports in the index of all DMRS ports indicated by the target row index are the DMRS ports associated with the PUSCH layer, and the last Y DMRS ports in the index of all DMRS ports indicated by the target row index are the target DMRS ports, where X is a rank number, Y is a number of the target DMRS ports, the sum of X and Y is equal to a total number of DMRS ports, and X and Y are both positive integers.

[0424] Alternatively,

[0425] the odd-numbered DMRS ports in the index of all DMRS ports indicated by the target row index are the DMRS ports associated with the PUSCH layer, and the even-numbered DMRS ports in the index of all DMRS ports indicated by the target row index are the target DMRS ports, or the even-numbered DMRS ports in the index of all DMRS ports indicated by the target row index are the DMRS ports associated with the PUSCH layer, and the odd-numbered DMRS ports in the index of all DMRS ports indicated by the target row index are the target DMRS ports.

[0426] In some embodiments, the wireless communication device 400 further includes:

[0427] a sending module 403 configured to send third information to the terminal;

[0428] The third information is used for indicating at least one row index of a second table.

[0429] The second table is a table associated with the target DMRS port, and the at least one row index is used for indicating at least one of the following: an index of the target DMRS port, and an index of a DMRS port associated with a PUSCH layer.

[0430] In some embodiments, the at least one row index includes a first row index and at least one second row index; the first row index is used for indicating the index of the DMRS port associated with the PUSCH layer, and the at least one second row index is used for indicating the index of the target DMRS port; and the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table.

[0431] Alternatively,

[0432] The at least one row index includes a first row index, and the first row index is used for indicating the index of the DMRS port associated with the PUSCH layer; a first association relationship exists between the first row index and an index of a row in which the index of the target DMRS port is located; or the index of the row in which the index of the target DMRS port is located is an index of a W-th row after the first row index, or the index of the row in which the index of the target DMRS port is located is an index of a W-th row before the first row index, W being a positive integer; and the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table.

[0433] Alternatively,

[0434] The at least one row index includes at least one second row index, and the at least one second row index is used for indicating the index of the target DMRS port; a second association relationship exists between the at least one second row index and an index of a row in which the index of the DMRS port associated with the PUSCH layer is located; or the index of the row in which the index of the DMRS port associated with the PUSCH layer is located is an index of a K-th row before the at least one second row index, or the index of the row in which the index of the DMRS port associated with the PUSCH layer is located is an index of a K-th row after the at least one second row index, K being a positive integer; and the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table.

[0435] Alternatively,

[0436] The at least one row index includes at least one second row index, and the at least one second row index is used to indicate an index of the target DMRS port; and the second table is used only for indication of the target DMRS port.

[0437] In some embodiments, the wireless communication device 400 further includes:

[0438] The sending module 403 is configured to send fourth information to the terminal;

[0439] The fourth information includes a target information field.

[0440] The target information field is used to enable a first table, or the target information field is used to enable a second table.

[0441] The first table is a table associated with the target DMRS port, and a target row index in the first table is used to indicate indexes of all DMRS ports, including an index of the target DMRS port and an index of a DMRS port associated with a PUSCH layer.

[0442] The second table is a table associated with the target DMRS port, and at least one row index in the second table is used to indicate at least one of the following: an index of the target DMRS port, and an index of a DMRS port associated with a PUSCH layer.

[0443] In some embodiments, the wireless communication device 400 further includes:

[0444] The sending module 403 is configured to send fifth information to the terminal;

[0445] The fifth information is used to indicate at least one of the following:

[0446] An orthogonal frequency division multiplexing (OFDM) symbol occupied by the target DMRS port.

[0447] A bandwidth occupied by the target DMRS port.

[0448] A CDM group occupied by the target DMRS port.

[0449] A sub-band occupied by the target DMRS port.

[0450] A transmission occasion of the target DMRS port.

[0451] A transmission power of the target DMRS port.

[0452] In some embodiments, the wireless communication device 400 further includes:

[0453] The sending module 403 is configured to send sixth information to the terminal.

[0454] The sixth information includes at least one of the following:

[0455] The first indication information is used to indicate that the terminal activates the cancellation of SRS sending on the target antenna port.

[0456] The second indication information is used to indicate the granularity of the cancellation of SRS sending.

[0457] The third indication information is used to indicate the antenna port of the cancellation of SRS sending.

[0458] The fourth indication information is used to indicate the bandwidth of the cancellation of SRS sending.

[0459] Therefore, in the embodiment of the present application, the terminal sends the uplink DMRS to the network side device through the target DMRS port; wherein the target DMRS port satisfies at least one of the following: one-to-one mapping between the target DMRS port and the antenna port, the target DMRS port is not associated with PUSCH transmission, the mapping between the target DMRS port and the antenna port uses a precoding method different from PUSCH transmission, and the target DMRS port is not precoded. Specifically, the network side device can determine the channel information (such as CSI) based on the uplink DMRS. Compared with the measurement result of the SRS (such as the periodic SRS), the uplink channel measurement function can be provided using the DMRS in the case of a larger SRS period, the SRS resource overhead is reduced, and the resource overhead of the uplink channel measurement is reduced.

[0460] The wireless communication device provided in the embodiment of the present application can realize each process realized by the method embodiment of FIG. 4 and achieve the same technical effects. To avoid repetition, details are not repeated here.

[0461] As shown in FIG. 7, the embodiment of the present application further provides a communication device 500, which includes a processor 501 and a memory 502, and the memory 502 stores programs or instructions executable on the processor 501.

[0462] For example, when the communication device 500 is a terminal, the programs or instructions are executed by the processor 501 to realize each step performed by the terminal in the wireless communication method embodiment described above, and the same technical effects can be achieved. To avoid repetition, details are not repeated here.

[0463] For example, when the communication device 500 is a network side device, the programs or instructions are executed by the processor 501 to realize each step performed by the network side device in the wireless communication method embodiment described above, and the same technical effects can be achieved. To avoid repetition, details are not repeated here.

[0464] The embodiment of the present application further provides a terminal comprising a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is configured to run programs or instructions to implement the steps in the method embodiment shown in FIG. 4. The terminal embodiment corresponds to the terminal-side method embodiment described above, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment and achieve the same technical effects. The terminal can be the wireless communication device 300 shown in FIG. 5.

[0465] Specifically, FIG. 8 is a schematic diagram of the hardware structure of a terminal for implementing the embodiment of the present application.

[0466] The terminal 600 comprises, but is not limited to, at least part of components such as a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, and a processor 610.

[0467] Those skilled in the art can understand that the terminal 600 can further comprise a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected with the processor 610 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG. 8 does not constitute a limitation on the terminal, and the terminal can comprise more or fewer components than those shown, or some components can be combined, or different components can be arranged, which will not be described here.

[0468] It should be understood that in the embodiment of the present application, the input unit 604 can comprise a graphic processor 6041 and a microphone 6042, and the graphic processor 6041 processes image data of a static picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 606 can comprise a display panel 6061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 607 comprises at least one of a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 can comprise two parts of a touch detection device and a touch controller. The other input devices 6072 can comprise, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), a trackball, a mouse, a joystick, etc., which will not be described here.

[0469] In the embodiment of the present application, the radio frequency unit 601 can transmit downlink data from a network side device to the processor 610 for processing, and can send uplink data to the network side device. Generally, the radio frequency unit 601 comprises, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0470] The memory 609 can be used to store software programs or instructions and various data. The memory 609 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 609 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 609 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0471] The processor 610 can include one or more processing units; optionally, the processor 610 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 610.

[0472] In some embodiments, the radio frequency unit 601 is configured to send an uplink DMRS to a network side device through a target demodulation reference signal (DMRS) port.

[0473] The target DMRS port satisfies at least one of the following conditions:

[0474] The target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port adopts a precoding manner different from that of the PUSCH transmission, and the target DMRS port is not precoded.

[0475] Therefore, in the embodiment of the present application, the terminal sends the uplink DMRS to the network side device through the target DMRS port; wherein the target DMRS port satisfies at least one of the following conditions: the target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with a PUSCH transmission, the mapping between the target DMRS port and the antenna port adopts a precoding manner different from that of the PUSCH transmission, and the target DMRS port is not precoded. Specifically, the network side device can determine the channel information (such as CSI) based on the uplink DMRS. Compared with the measurement result of the SRS (such as the periodic SRS), the uplink channel measurement function can be provided by using the DMRS in the case of a larger SRS period, the SRS resource overhead is reduced, and the resource overhead of the uplink channel measurement is reduced.

[0476] It can be understood that the implementation processes of each implementation manner mentioned in the embodiment can refer to the related description of the method embodiment and achieve the same or corresponding technical effects. To avoid repetition, they will not be described here again.

[0477] The embodiment of the present application also provides a network side device, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to realize the steps of the method embodiment shown in FIG. 4. The network side device embodiment corresponds to the method embodiment executed by the network side device described above. Each implementation process and implementation manner of the method embodiment described above can be applied to the network side device embodiment and can achieve the same technical effects.

[0478] The embodiment of the present application also provides a network side device, which can be the wireless communication device 400 shown in FIG. 6. Specifically, as shown in FIG. 9, the network side device 700 includes an antenna 71, a radio frequency device 72, a baseband device 73, a processor 74 and a memory 75. The antenna 71 is connected with the radio frequency device 72. In the uplink direction, the radio frequency device 72 receives information through the antenna 71 and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes the information to be sent and sends it to the radio frequency device 72. The radio frequency device 72 processes the received information and sends it out through the antenna 71.

[0479] The method executed by the network side device in the above embodiment can be implemented in the baseband device 73, which includes a baseband processor.

[0480] The baseband device 73 can include at least one baseband board on which a plurality of chips are disposed, as shown in FIG. 9. One of the chips is, for example, a baseband processor, which is connected with the memory 75 through a bus interface to invoke a program in the memory 75 and perform the operations of the network-side device shown in the above method embodiments.

[0481] The network-side device can further include a network interface 76, which is, for example, a Common Public Radio Interface (CPRI).

[0482] Specifically, the network-side device 700 of the embodiments of the present application further includes instructions or programs stored in the memory 75 and executable on the processor 74, which invokes the instructions or programs in the memory 75 to perform the method executed by the modules shown in FIG. 6 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0483] The embodiments of the present application further provide a readable storage medium having programs or instructions stored thereon, which are executed by a processor to implement each process of the above wireless communication method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0484] The processor is the processor in the terminal or the network-side device described in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0485] The embodiments of the present application further provide a chip including a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is configured to execute programs or instructions to implement each process of the above wireless communication method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0486] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system on chip (SoC), a chip system or a system on chip (SoC) chip, etc.

[0487] The embodiments of the present application further provide a computer program / program product stored in a storage medium, which is executed by at least one processor to implement each process of the above wireless communication method embodiments and achieve the same technical effects. To avoid repetition, details are not described herein.

[0488] The embodiments of the present application further provide a wireless communication system, comprising a terminal and a network side device, the terminal can be used to execute the steps executed by the terminal in the wireless communication method, and the network side device can be used to execute the steps executed by the network side device in the wireless communication method.

[0489] It should be noted that, in this document, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements does not only include those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0490] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of computer software product and general hardware platform, of course, it can also be realized by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disc, optical disc, etc.), including a plurality of instructions, used to make the terminal or network side device execute the method described in each embodiment of the present application.

[0491] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms of embodiments under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A method for wireless communication, comprising: transmitting, by a terminal, an uplink demodulation reference signal (DMRS) to a network side device via target DMRS ports; wherein the target DMRS ports satisfy at least one of the following: the target DMRS ports are one-to-one mapped with antenna ports, the target DMRS ports are not associated with physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS ports and the antenna ports uses a precoding manner different from that of the PUSCH transmission, and the target DMRS ports are not precoded. 2.The method of claim 1, wherein: the target DMRS ports are DMRS ports other than DMRS ports associated with PUSCH layers among all DMRS ports; and / or, a number of the target DMRS ports is a difference between a total number of DMRS ports and a rank number; and / or, the target DMRS ports are DMRS ports corresponding to columns with only one non-zero value in a precoding matrix. The method further comprises: receiving, by the terminal, first information from the network side device; wherein the first information is used to indicate at least one of the following: the number of the target DMRS ports; indexes of the target DMRS ports; a total number of DMRS ports; indexes of all DMRS ports; and indexes of DMRS ports associated with PUSCH layers. The method further comprises: receiving, by the terminal, second information from the network side device; wherein the second information is used to indicate a target row index of a first table; wherein the first table is a table associated with the target DMRS ports, and the target row index is used to indicate indexes of all DMRS ports, which include indexes of the target DMRS ports and indexes of DMRS ports associated with PUSCH layers. 5.The method of claim 4, wherein: indexes of first X DMRS ports among the indexes of all DMRS ports indicated by the target row index are indexes of the DMRS ports associated with PUSCH layers, and indexes of last Y DMRS ports among the indexes of all DMRS ports indicated by the target row index are indexes of the target DMRS ports, wherein X is a rank number, Y is the number of the target DMRS ports, a sum of X and Y is equal to a total number of DMRS ports, and X and Y are positive integers; or, indexes of odd-numbered DMRS ports among the indexes of all DMRS ports indicated by the target row index are indexes of the DMRS ports associated with PUSCH layers, and indexes of even-numbered DMRS ports among the indexes of all DMRS ports indicated by the target row index are indexes of the target DMRS ports; or, indexes of even-numbered DMRS ports among the indexes of all DMRS ports indicated by the target row index are indexes of the DMRS ports associated with PUSCH layers, and indexes of odd-numbered DMRS ports among the indexes of all DMRS ports indicated by the target row index are indexes of the target DMRS ports. ​ ​ ​ 3. The method of claim 1 or 2, wherein, ​ ​ ​ ​ ​ ​ ​ ​ 4. The method of any one of claims 1 to 3, wherein, ​ ​ ​ ​ ​ ​ ​ ​ 6. The method of any one of claims 1 to 5, wherein, The method further comprises: The terminal receives third information from the network side device; Wherein, the third information is used to indicate at least one row index of the second table; Wherein, the second table is a table associated with the target DMRS port, and the at least one row index is used to indicate at least one of the following: the index of the target DMRS port, and the index of the DMRS port associated with the PUSCH layer.

7. The method of claim 6, wherein, The at least one row index includes a first row index and at least one second row index; wherein the first row index is used to indicate the index of the DMRS port associated with the PUSCH layer, and the at least one second row index is used to indicate the index of the target DMRS port; wherein the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table; Or, The at least one row index includes a first row index, and the first row index is used to indicate the index of the DMRS port associated with the PUSCH layer; wherein there is a first association relationship between the first row index and the index of the row where the index of the target DMRS port is located; or the index of the row where the index of the target DMRS port is located is the index of the Wth row after the first row index, or the index of the row where the index of the target DMRS port is located is the index of the Wth row before the first row index, W being a positive integer; wherein the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table; Or, The at least one row index includes at least one second row index, and the at least one second row index is used to indicate the index of the target DMRS port; wherein there is a second association relationship between the at least one second row index and the index of the row where the index of the DMRS port associated with the PUSCH layer is located; or the index of the row where the index of the DMRS port associated with the PUSCH layer is located is the index of the Kth row before the at least one second row index, or the index of the row where the index of the DMRS port associated with the PUSCH layer is located is the index of the Kth row after the at least one second row index, K being a positive integer; wherein the index of the target DMRS port and the index of the DMRS port associated with the PUSCH layer are located in different rows in the second table; Or, The at least one row index includes at least one second row index, and the at least one second row index is used to indicate the index of the target DMRS port; wherein the second table is only used for indication of the target DMRS port.

8. The method of any one of claims 1 to 7, wherein, The method further comprises: The terminal receives fourth information from the network side device; Wherein, the fourth information includes a target information field; Wherein, the target information field is used to enable a first table, or the target information field is used to enable a second table; The first table is a table associated with the target DMRS port, and a target row index in the first table is used to indicate indexes of all DMRS ports, the indexes of the all DMRS ports including an index of the target DMRS port and indexes of DMRS ports associated with PUSCH layers. The second table is a table associated with the target DMRS port, and at least one row index in the second table is used to indicate at least one of the following: the index of the target DMRS port, and the indexes of the DMRS ports associated with the PUSCH layers.

9. The method of any one of claims 3-8, wherein the indexes of the DMRS ports associated with the PUSCH layers share a number of non-data DMRS code division multiplexing (CDM) groups with the index of the target DMRS port, or the number of non-data DMRS CDM groups associated with the indexes of the DMRS ports associated with the PUSCH layers is the same as the number of non-data DMRS CDM groups associated with the index of the target DMRS port; and / or the indexes of the DMRS ports associated with the PUSCH layers share a number of prepended payload symbols with the index of the target DMRS port, or the number of prepended payload symbols associated with the indexes of the DMRS ports associated with the PUSCH layers is the same as the number of prepended payload symbols associated with the index of the target DMRS port.

10. The method of claim 4, 5, or 8, wherein the first table is determined from M tables based on a total number of DMRS ports, M being a positive integer.

11. The method of any one of claims 6-8, wherein the second table is determined from M tables based on a total number of DMRS ports, M being a positive integer; or the second table is determined from N tables based on a rank number or a number of the target DMRS ports, N being a positive integer.

12. The method of any one of claims 1 to 11, wherein, The method further includes: receiving, by the terminal, fifth information from the network-side device; wherein the fifth information is used to indicate at least one of the following: an orthogonal frequency division multiplexing (OFDM) symbol occupied by the target DMRS port; a bandwidth occupied by the target DMRS port; a CDM group occupied by the target DMRS port; a sub-band occupied by the target DMRS port; a transmission occasion of the target DMRS port; and a transmission power of the target DMRS port.

13. The method of any one of claims 1-12, wherein the target DMRS port corresponds to Z antenna ports, Z being a positive integer; the Z antenna ports are determined from P antenna port combinations based on values of Z, wherein different antenna port combinations in the P antenna port combinations include different numbers of antenna ports, P being a positive integer; or the Z antenna ports are determined from Q antenna port combinations, wherein each antenna port combination in the Q antenna port combinations includes Z antenna ports, and indexes of the antenna ports included in each antenna port combination in the Q antenna port combinations are at least partially different; or The Z antenna ports are determined from R antenna port combinations, wherein each antenna port combination in the R antenna port combinations contains different numbers or indexes of antenna ports; Or, Indexes of the Z antenna ports are determined based on network side indication; Or, The Z antenna ports are antenna ports corresponding to specific rows in a precoding matrix.

14. The method of claim 13, wherein, The specific behavior is one of the following: a row with all values being 0; a row not in one-to-one mapping with a layer; a row not in one-to-one mapping with a layer, and a row in the row not in full rank with a precoding matrix composed of the layer.

15. The method of any one of claims 1 to 14, wherein, The target DMRS ports and the antenna ports are in one-to-one mapping in ascending order of indexes; or, The target DMRS ports and the antenna ports are in one-to-one mapping in descending order of indexes; or, The target DMRS ports and the antenna ports are in one-to-one mapping based on network side indication; or, The target DMRS ports and the antenna ports are in one-to-one mapping based on a first precoding matrix, wherein rows of the first precoding matrix correspond to antenna ports, and columns of the first precoding matrix correspond to the target DMRS ports.

16. The method of any one of claims 1 to 15, wherein, The method further comprises: The terminal cancels sounding reference signal (SRS) transmission on the target antenna port; Wherein, the target DMRS port and the SRS on the target antenna port are located in different OFDM symbols, and the target DMRS port and the SRS on the target antenna port satisfy a first time interval.

17. The method of claim 16, wherein, The target antenna port is part or all of the antenna ports corresponding to a column in a precoding matrix with only one non-zero value, or the target antenna port is part or all of the antenna ports corresponding to the target DMRS ports.

18. The method of claim 16 or 17, wherein, The terminal cancels SRS transmission on the target antenna port, comprising: In the case that a third association relationship is satisfied between the target DMRS port and the target antenna port, the terminal cancels SRS transmission on the target antenna port; Wherein, the third association relationship includes at least one of the following: At least part of the target antenna ports and the target DMRS port are the same port; The target DMRS port is associated with a second precoding matrix, wherein channels of at least part of the target antenna ports are determined based on the second precoding matrix and channels of the target DMRS port.

19. The method of any one of claims 16-18, wherein, The method further comprises: The terminal receives sixth information from the network side device; Wherein, the sixth information includes at least one of the following: First indication information for indicating to activate the terminal to cancel SRS transmission on the target antenna port; Second indication information for indicating the granularity of canceling SRS transmission; Third indication information for indicating the antenna port of canceling SRS transmission; A fourth indication information, used for indicating a bandwidth of which SRS transmission is cancelled.

20. A method for wireless communication, comprising: receiving, by a network-side device, an uplink demodulation reference signal (DMRS) sent by a terminal through a target DMRS port, and determining, by the network-side device, channel information according to the uplink DMRS; wherein the target DMRS port satisfies at least one of the following conditions: the target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from PUSCH transmission, and the target DMRS port is not precoded.

21. The method of claim 20, wherein: the target DMRS port is a DMRS port other than a DMRS port associated with a PUSCH layer among all DMRS ports; and / or, a number of the target DMRS ports is a difference between a total number of DMRS ports and a rank (Rank) number; and / or, the target DMRS port is a DMRS port corresponding to a column with only one non-zero value in a precoding matrix.

22. The method of claim 20 or 21, wherein, The method further comprises: sending, by the network-side device, first information to the terminal; wherein the first information is used for indicating at least one of the following: a number of the target DMRS ports; an index of the target DMRS port; a total number of DMRS ports; an index of all DMRS ports; an index of a DMRS port associated with a PUSCH layer.

23. The method of any one of claims 20-22, wherein, The method further comprises: sending, by the network-side device, second information to the terminal; wherein the second information is used for indicating a target row index of a first table; wherein the first table is a table associated with the target DMRS port, and the target row index is used for indicating an index of all DMRS ports, the index of all DMRS ports including an index of the target DMRS port and an index of a DMRS port associated with a PUSCH layer.

24. The method of any one of claims 20-23, wherein, The method further comprises: sending, by the network-side device, third information to the terminal; wherein the third information is used for indicating at least one row index of a second table; wherein the second table is a table associated with the target DMRS port, and the at least one row index is used for indicating at least one of the following: an index of the target DMRS port, and an index of a DMRS port associated with a PUSCH layer.

25. The method of any one of claims 20-24, wherein, The method further comprises: sending, by the network-side device, fourth information to the terminal; wherein the fourth information includes a target information field; wherein the target information field is used for enabling the first table, or the target information field is used for enabling the second table; wherein the first table is a table associated with the target DMRS port, and a target row index in the first table is used for indicating an index of all DMRS ports, the index of all DMRS ports including an index of the target DMRS port and an index of a DMRS port associated with a PUSCH layer. The second table is a table associated with the target DMRS port, and at least one row index in the second table is used to indicate at least one of the following: an index of the target DMRS port, an index of a DMRS port associated with a PUSCH layer.

26. The method of any one of claims 20-25, wherein, The method further includes: The network-side device sends fifth information to the terminal; The fifth information is used to indicate at least one of the following: An orthogonal frequency division multiplexing (OFDM) symbol occupied by the target DMRS port; A bandwidth occupied by the target DMRS port; A CDM group occupied by the target DMRS port; A sub-band occupied by the target DMRS port; A transmission occasion of the target DMRS port; A transmission power of the target DMRS port.

27. The method of any one of claims 20 to 26, wherein, The method further includes: The network-side device sends sixth information to the terminal; The sixth information includes at least one of the following: First indication information used to indicate that the terminal cancels SRS transmission on the target antenna port; Second indication information used to indicate a granularity of the SRS transmission cancellation; Third indication information used to indicate an antenna port of the SRS transmission cancellation; Fourth indication information used to indicate a bandwidth of the SRS transmission cancellation.

28. A wireless communication apparatus, comprising: a sending module configured to send, to a network-side device, an uplink demodulation reference signal (DMRS) through a target DMRS port; The target DMRS port satisfies at least one of the following: The target DMRS port is one-to-one mapped with an antenna port, the target DMRS port is not associated with physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from the PUSCH transmission, and the target DMRS port is not precoded.

29. The apparatus of claim 28, wherein: The target DMRS port is a DMRS port other than a DMRS port associated with a PUSCH layer among all DMRS ports; and / or, The number of target DMRS ports is a difference between a total number of DMRS ports and a rank (Rank) number; and / or, The target DMRS port is a DMRS port corresponding to a column with only one non-zero value in a precoding matrix.

30. The apparatus of claim 28 or 29, wherein, The wireless communication apparatus further includes: a receiving module configured to receive, from the network-side device, first information; The first information is used to indicate at least one of the following: The number of target DMRS ports; An index of the target DMRS port; A total number of DMRS ports; An index of all DMRS ports; An index of a DMRS port associated with a PUSCH layer.

31. The apparatus of any one of claims 28-30, wherein, The wireless communication apparatus further includes: a receiving module configured to receive, from the network-side device, second information; The second information is used to indicate a target row index of a first table; The first table is a table associated with the target DMRS port, and the target row index is used to indicate an index of all DMRS ports, and the index of all DMRS ports includes an index of the target DMRS port and an index of a DMRS port associated with a PUSCH layer.

32. The apparatus of any one of claims 28-31, wherein, The wireless communication device further includes: a receiving module, configured to receive third information from the network-side device; wherein the third information is used to indicate at least one row index of a second table; wherein the second table is a table associated with the target DMRS port, and the at least one row index is used to indicate at least one of the following: an index of the target DMRS port, and an index of a DMRS port associated with a PUSCH layer.

33. The apparatus of any one of claims 28-32, wherein, The wireless communication device further includes: a receiving module, configured to receive fourth information from the network-side device; wherein the fourth information includes a target information field; wherein the target information field is used to enable a first table, or the target information field is used to enable a second table; wherein the first table is a table associated with the target DMRS port, and a target row index in the first table is used to indicate indexes of all DMRS ports, including an index of the target DMRS port and an index of a DMRS port associated with a PUSCH layer; wherein the second table is a table associated with the target DMRS port, and at least one row index in the second table is used to indicate at least one of the following: an index of the target DMRS port, and an index of a DMRS port associated with a PUSCH layer.

34. The apparatus of any one of claims 28-33, wherein, The wireless communication device further includes: a receiving module, configured to receive fifth information from the network-side device; wherein the fifth information is used to indicate at least one of the following: an orthogonal frequency division multiplexing, OFDM, symbol occupied by the target DMRS port; a bandwidth occupied by the target DMRS port; a CDM group occupied by the target DMRS port; a sub-band occupied by the target DMRS port; a transmission occasion of the target DMRS port; a transmission power of the target DMRS port.

35. The apparatus of any one of claims 28-34, wherein, The wireless communication device further includes: a processing module, configured to cancel sounding reference signal, SRS, transmission on a target antenna port; wherein the SRS on the target DMRS port and the target antenna port are located in different OFDM symbols, and a first time interval is satisfied between the target DMRS port and the SRS on the target antenna port.

36. The apparatus of claim 35, wherein, The target antenna port is part or all of the antenna ports corresponding to a column with only one non-zero value in a precoding matrix, or the target antenna port is part or all of the antenna ports corresponding to the target DMRS port.

37. The apparatus of claim 35 or 36, wherein, The processing module is specifically configured to: cancel SRS transmission on the target antenna port in a case where a third association relationship is satisfied between the target DMRS port and the target antenna port; wherein the third association relationship includes at least one of the following: the target DMRS port and at least part of the target antenna ports are the same port; the target DMRS port is associated with a second precoding matrix, and a channel of at least part of the target antenna ports is determined based on the second precoding matrix and a channel of the target DMRS port.

38. The apparatus of any one of claims 35-37, wherein, The wireless communication device further includes: receiving a sixth information from the network side device; wherein the sixth information comprises at least one of: first indication information for indicating to activate the wireless communication device to cancel SRS transmission on the target antenna port; second indication information for indicating a granularity of cancelling SRS transmission; third indication information for indicating an antenna port of cancelling SRS transmission; fourth indication information for indicating a bandwidth of cancelling SRS transmission.

39. A wireless communication device comprising: a receiving module configured to receive an uplink demodulation reference signal (DMRS) transmitted by a terminal through a target DMRS port; a processing module configured to determine channel information according to the uplink DMRS; wherein the target DMRS port satisfies at least one of: a one-to-one mapping between the target DMRS port and an antenna port, the target DMRS port is not associated with physical uplink shared channel (PUSCH) transmission, the mapping between the target DMRS port and the antenna port uses a precoding manner different from PUSCH transmission, and the target DMRS port is not precoded.

40. The device of claim 39, wherein: the target DMRS port is a DMRS port other than a DMRS port associated with a PUSCH layer among all DMRS ports; and / or, a number of the target DMRS ports is a difference between a total number of DMRS ports and a rank (Rank) number; and / or, the target DMRS port is a DMRS port corresponding to a column with only one non-zero value in a precoding matrix.

41. The apparatus of claim 39 or 40, wherein, the wireless communication device further comprises: a sending module configured to send first information to the terminal; wherein the first information is used to indicate at least one of: a number of the target DMRS ports; an index of the target DMRS port; a total number of DMRS ports; an index of all DMRS ports; an index of a DMRS port associated with a PUSCH layer.

42. The apparatus of any one of claims 39-41, wherein, the wireless communication device further comprises: a sending module configured to send second information to the terminal; wherein the second information is used to indicate a target row index of a first table; wherein the first table is a table associated with the target DMRS port, and the target row index is used to indicate an index of all DMRS ports, the index of all DMRS ports including an index of the target DMRS port and an index of a DMRS port associated with a PUSCH layer.

43. The apparatus of any one of claims 39-42, wherein, the wireless communication device further comprises: a sending module configured to send third information to the terminal; wherein the third information is used to indicate at least one row index of a second table; wherein the second table is a table associated with the target DMRS port, and the at least one row index is used to indicate at least one of: an index of the target DMRS port, and an index of a DMRS port associated with a PUSCH layer.

44. The apparatus of any one of claims 39-43, wherein, the wireless communication device further comprises: a sending module configured to send fourth information to the terminal; wherein the fourth information comprises a target information field; wherein the target information field is used to enable a first table, or the target information field is used to enable a second table. The first table is a table associated with the target DMRS port, and a target row index in the first table is used to indicate indexes of all DMRS ports, including an index of the target DMRS port and indexes of DMRS ports associated with PUSCH layers. The second table is a table associated with the target DMRS port, and at least one row index in the second table is used to indicate at least one of the following: the index of the target DMRS port, and the indexes of the DMRS ports associated with the PUSCH layers.

45. The apparatus of any one of claims 39-44, wherein, The wireless communication device further includes: a sending module configured to send fifth information to the terminal; The fifth information is used to indicate at least one of the following: an orthogonal frequency division multiplexing (OFDM) symbol occupied by the target DMRS port; a bandwidth occupied by the target DMRS port; a CDM group occupied by the target DMRS port; a sub-band occupied by the target DMRS port; a transmission occasion of the target DMRS port; and a transmission power of the target DMRS port.

46. The apparatus of any one of claims 39-45, wherein, The wireless communication device further includes: a sending module configured to send sixth information to the terminal; The sixth information includes at least one of the following: first indication information used to indicate that the terminal is activated to cancel SRS transmission on the target antenna port; second indication information used to indicate a granularity of the canceled SRS transmission; third indication information used to indicate an antenna port of the canceled SRS transmission; fourth indication information used to indicate a bandwidth of the canceled SRS transmission.

47. A terminal comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implementing steps of the wireless communication method according to any one of claims 1 to 19.

48. A network-side device comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implementing steps of the wireless communication method according to any one of claims 20 to 27.

49. A readable storage medium, the readable storage medium storing programs or instructions, the programs or instructions, when executed by a processor, implementing steps of the wireless communication method according to any one of claims 1 to 19, or implementing steps of the wireless communication method according to any one of claims 20 to 27.

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