Communication method, device, and storage medium

Abstract

Embodiments of the present application provide a communication method, device and storage medium. The method comprises: determining, by a network device, a plurality of indication information, each indication information being used for indicating an identity of information, the information being any information in a plurality of information, the information indicating whether a DMRS port corresponding to any one of a plurality of antenna groups or a CDM group corresponding to the antenna group is occupied, the DMRS port corresponding to the antenna group being located in a same CDM group, and the DMRS ports corresponding to different antenna groups being located in different CDM groups; and sending the plurality of indication information, when the information indicates the DMRS port corresponding to the antenna group, the information further indicating a number of CDM groups without data, or sending first indication information, the first indication information being used for indicating the number of CDM groups without data. In the above scheme, the DMRS port corresponding to each antenna group is located in a same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups, so that interference between the antenna groups can be effectively suppressed in MIMO equalization processing.

Description

Communication method, device and storage medium

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 29, 2024, with application number 202410389159.0 and application name “Communication Method, Device and Storage Medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method, device, and storage medium. Background Art

[0003] Existing communication systems can support up to 8-layer downlink (DL) single-user (SU)-multiple input multiple output (MIMO) transmission. However, the complexity and cost of conventional 8-layer receivers are high, and research on low-complexity 8-layer receivers is needed.

[0004] To reduce the complexity of an 8-layer receiver, the technology can be used to split the 8-layer receiver into two 4-layer sub-receivers, with independent MIMO equalization performed on the antenna groups corresponding to each sub-receiver. However, since this independent MIMO equalization only uses the channel information of the corresponding antenna group and not the channel information of all antennas, it cannot suppress interference from other antenna groups. Summary of the Invention

[0005] The embodiments of the present application provide a communication method, device, and storage medium, in which the DMRS ports corresponding to each antenna group are located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups, which can effectively suppress interference between antenna groups in MIMO equalization processing.

[0006] In a first aspect, an embodiment of the present application provides a communication method, including: receiving multiple indication information, each indication information is used to indicate the identification of information, the information is any information among the multiple information, the information indicates whether the DMRS port corresponding to any antenna group among multiple antenna groups or the CDM group corresponding to the antenna group is occupied, the DMRS port corresponding to the antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups; when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups with no data, or receives first indication information, the first indication information is used to indicate the number of CDM groups with no data.

[0007] In a possible implementation, the information further indicates the number of transmission layers corresponding to the antenna group.

[0008] In a possible implementation, the number of transmission layers corresponding to an antenna group is the same as the number of DMRS ports corresponding to the antenna group.

[0009] In a possible implementation, the information further indicates the number of symbols occupied by the preamble DMRS.

[0010] In a possible implementation, different antenna groups have different baseband processing function modules.

[0011] In one possible implementation, the multiple indication information includes second indication information and third indication information, the second indication information is used to indicate the identifier of the first information, and the third indication information is used to indicate the identifier of the second information, wherein the first information is any information among the multiple first information, the first information indicates the DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group; the second information is any information among the multiple second information, the second information indicates the DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

[0012] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 1; the second CDM group is a CDM group in DMRS configuration type 1 except the first CDM group.

[0013] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 2; the second CDM group is any CDM group in DMRS configuration type 2 except the first CDM group.

[0014] In a possible implementation, multiple indication information is carried in a DCI, a MAC CE or an RRC message.

[0015] In a possible implementation manner, the first indication information is carried in a DCI, a MAC CE or an RRC message.

[0016] In a possible implementation, the multiple antenna groups are receiving antenna groups of the terminal device.

[0017] In a second aspect, an embodiment of the present application provides a communication method, including: determining multiple indication information, each indication information is used to indicate the identification of information, the information is any information among the multiple information, the information indicates whether the DMRS port corresponding to any antenna group in the multiple antenna groups or the CDM group corresponding to the antenna group is occupied, the DMRS port corresponding to the antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups; sending multiple indication information, when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups with no data, or sending first indication information, the first indication information is used to indicate the number of CDM groups with no data.

[0018] In a possible implementation, the information further indicates the number of transmission layers corresponding to the antenna group.

[0019] In a possible implementation, the number of transmission layers corresponding to an antenna group is the same as the number of DMRS ports corresponding to the antenna group.

[0020] In a possible implementation, the information further indicates the number of symbols occupied by the preamble DMRS.

[0021] In a possible implementation, different antenna groups have different baseband processing function modules.

[0022] In one possible implementation, the multiple indication information includes second indication information and third indication information, the second indication information is used to indicate the identifier of the first information, and the third indication information is used to indicate the identifier of the second information, wherein the first information is any information among the multiple first information, the first information indicates the DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group; the second information is any information among the multiple second information, the second information indicates the DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

[0023] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 1; the second CDM group is a CDM group in DMRS configuration type 1 except the first CDM group.

[0024] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 2; the second CDM group is any CDM group in DMRS configuration type 2 except the first CDM group.

[0025] In a possible implementation manner, the multiple second indication information is carried in a DCI, a MAC CE or an RRC message.

[0026] In a possible implementation manner, the first indication information is carried in a DCI, a MAC CE or an RRC message.

[0027] In a possible implementation, the multiple antenna groups are receiving antenna groups of the terminal device.

[0028] In a third aspect, an embodiment of the present application provides a communication device, comprising: a receiving module for receiving multiple indication information, each indication information being used to indicate an identification of information, the information being any information among the multiple information, the information indicating whether the DMRS port corresponding to any antenna group among the multiple antenna groups or the CDM group corresponding to the antenna group is occupied, the DMRS port corresponding to the antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups; when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups with no data, or receives the first indication information, the first indication information being used to indicate the number of CDM groups with no data.

[0029] In a possible implementation, the information further indicates the number of transmission layers corresponding to the antenna group.

[0030] In a possible implementation, the number of transmission layers corresponding to an antenna group is the same as the number of DMRS ports corresponding to the antenna group.

[0031] In a possible implementation, the information further indicates the number of symbols occupied by the preamble DMRS.

[0032] In a possible implementation, different antenna groups have different baseband processing function modules.

[0033] In one possible implementation, the multiple indication information includes second indication information and third indication information, the second indication information is used to indicate the identifier of the first information, and the third indication information is used to indicate the identifier of the second information, wherein the first information is any information among the multiple first information, the first information indicates the DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group; the second information is any information among the multiple second information, the second information indicates the DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

[0034] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 1; the second CDM group is a CDM group in DMRS configuration type 1 except the first CDM group.

[0035] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 2; the second CDM group is any CDM group in DMRS configuration type 2 except the first CDM group.

[0036] In a possible implementation manner, the multiple second indication information is carried in a DCI, a MAC CE or an RRC message.

[0037] In a possible implementation manner, the first indication information is carried in a DCI, a MAC CE or an RRC message.

[0038] In a possible implementation, the multiple antenna groups are receiving antenna groups of the terminal device.

[0039] In fourth aspect, an embodiment of the present application provides a communication device, including: a determination module, used to determine multiple indication information, each indication information is used to indicate the identification of information, the information is any information among the multiple information, the information indicates whether the DMRS port corresponding to any antenna group in the multiple antenna groups or the CDM group corresponding to the antenna group is occupied, the DMRS port corresponding to the antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups; a sending module, used to send multiple indication information, when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups with no data, or sends a first indication information, the first indication information is used to indicate the number of CDM groups with no data.

[0040] In a possible implementation, the information further indicates the number of transmission layers corresponding to the antenna group.

[0041] In a possible implementation, the number of transmission layers corresponding to an antenna group is the same as the number of DMRS ports corresponding to the antenna group.

[0042] In a possible implementation, the information further indicates the number of symbols occupied by the preamble DMRS.

[0043] In a possible implementation, different antenna groups have different baseband processing function modules.

[0044] In one possible implementation, the multiple indication information includes second indication information and third indication information, the second indication information is used to indicate the identifier of the first information, and the third indication information is used to indicate the identifier of the second information, wherein the first information is any information among the multiple first information, the first information indicates the DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group; the second information is any information among the multiple second information, the second information indicates the DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

[0045] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 1; the second CDM group is a CDM group in DMRS configuration type 1 except the first CDM group.

[0046] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 2; the second CDM group is any CDM group in DMRS configuration type 2 except the first CDM group.

[0047] In a possible implementation manner, the multiple second indication information is carried in a DCI, a MAC CE or an RRC message.

[0048] In a possible implementation manner, the first indication information is carried in a DCI, a MAC CE or an RRC message.

[0049] In a possible implementation, the multiple antenna groups are receiving antenna groups of the terminal device.

[0050] In the fifth aspect, an embodiment of the present application provides a terminal device, comprising: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the terminal device executes the method described in the first aspect or any possible implementation of the first aspect.

[0051] In the sixth aspect, an embodiment of the present application provides a network device, comprising: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the network device performs the method described in the second aspect or any possible implementation of the second aspect.

[0052] In the seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program or instructions. When the computer program or instructions are executed by a processor, the method described in the first aspect or any possible implementation of the first aspect is implemented, or the method described in the second aspect or any possible implementation of the second aspect is implemented.

[0053] In an eighth aspect, an embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is run, it enables the computer to execute the method described in the first aspect or any possible implementation of the first aspect, or enables the computer to execute the method described in the second aspect or any possible implementation of the second aspect.

[0054] In a ninth aspect, an embodiment of the present application provides a chip or chip system, which includes at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected by a line, and the at least one processor is used to run a computer program or instruction to execute the method described in the first aspect or any possible implementation of the first aspect, or to execute the method described in the second aspect or any possible implementation of the second aspect. The communication interface in the chip can be an input / output interface, a pin, or a circuit, etc.

[0055] The embodiment of the present application provides a communication method, device and storage medium. The method includes: a network device determines multiple indication information, each indication information is used to indicate the identification of information, the information is any information among the multiple information, the information indicates whether the DMRS port corresponding to any antenna group in the multiple antenna groups or the CDM group corresponding to the antenna group is occupied, the DMRS port corresponding to the antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups; sending multiple indication information, when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups without data, or sending first indication information, the first indication information is used to indicate the number of CDM groups without data. In the above scheme, the DMRS port corresponding to each antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups, which can effectively suppress interference between antenna groups in MIMO equalization processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] FIG1 is a diagram of a communication system architecture provided by an embodiment of the present application;

[0057] FIG2 is a schematic diagram of the structure of two sub-receivers provided in an embodiment of the present application;

[0058] FIG3A is a schematic structural diagram of type 1 of two sub-receivers provided in an embodiment of the present application;

[0059] FIG3B is a schematic diagram of the structure of type 2 of two sub-receivers provided in an embodiment of the present application;

[0060] FIG3C is a schematic diagram of the structure of type 3 of two sub-receivers provided in an embodiment of the present application;

[0061] FIG4A is a schematic diagram of DMRS resources of DMRS configuration type 1 in an embodiment of the present application;

[0062] FIG4B is a schematic diagram of DMRS resources of DMRS configuration type 2 in an embodiment of the present application;

[0063] FIG5 is a flow chart of a communication method provided in an embodiment of the present application;

[0064] FIG6 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0065] FIG7 is a schematic structural diagram of another communication device provided in an embodiment of the present application;

[0066] FIG8 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application;

[0067] FIG9 is a schematic diagram of the structure of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0068] In the embodiments of this application, terms such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. For example, the first indication information and the second indication information are merely used to distinguish between different indication information and do not limit their order. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and that terms such as "first" and "second" do not necessarily define differences.

[0069] To facilitate a clear description of the technical solutions of the embodiments of this application, the words "exemplary" or "for example" are used in the embodiments of this application to indicate examples, illustrations, or explanations. Any embodiment or design described in this application as "exemplary" or "for example" should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0070] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0071] It should be noted that the “when (at)…” or “when (at)…” in the embodiments of the present application can be the moment a certain situation occurs, or it can be a period of time after a certain situation occurs, and the embodiments of the present application do not make specific limitations on this.

[0072] In order to better understand the communication method provided in the embodiment of the present application, the communication system architecture of the embodiment of the present application is first described below.

[0073] Figure 1 is a diagram of the communication system architecture provided by an embodiment of the present application. As shown in Figure 1, the communication system 100 includes a terminal device 101 and a network device 102. The terminal device 101 includes multiple antenna groups, and the terminal device 101 wirelessly communicates with the network device 102 via the multiple antenna groups.

[0074] The terminal device involved in the embodiments of the present application can also be called a terminal, which can be a device with wireless transceiver function, which can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.). The terminal device can be user equipment (UE), where UE includes a handheld device, vehicle-mounted device, wearable device or computing device with wireless communication function. Exemplarily, UE can be a mobile phone, a tablet computer or a computer with wireless transceiver function. The terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in unmanned driving, a wireless terminal device in telemedicine, a wireless terminal device in smart grid, a wireless terminal device in smart city, a wireless terminal device in smart home, etc. In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device; it can also be a device that can support the terminal device to realize the function, such as a chip system, which can be installed in the terminal device.

[0075] The network device involved in the embodiments of the present application may be an access network (RAN) device in a mobile communication system. The RAN device is mainly responsible for radio resource management, quality of service (QoS) management, data compression and encryption, etc. on the air interface side. For example: a base station NodeB, an evolved base station eNodeB, a base station in a 5G mobile communication system or a new generation wireless (NR) communication system, a base station in a future mobile communication system, etc. In the embodiments of the present application, the device for implementing the function of the network device may be a network device, or a device that can support the network device to implement the function, such as a chip system, which may be installed in the network device.

[0076] The technical solutions provided in the embodiments of the present application can be applied to the long term evolution (LTE) architecture, and can also be applied to the universal mobile telecommunications system (UMTS) terrestrial radio access network (UTRAN) architecture, or the global system for mobile communication (GSM) / enhanced data rate for GSM evolution (EDGE) system radio access network (GSM EDGE radio access network, GERAN) architecture. In addition, the technical solutions provided in the embodiments of the present application can also be applied to any other wireless communication system with similar structure and function, such as a public land mobile network (PLMN) system, a 5G communication system or a communication system after 5G, etc., and the embodiments of the present application do not impose any restrictions on this.

[0077] To facilitate a clear description of the technical solutions of the embodiments of the present application, some of the terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0078] 1. Receiver Type

[0079] Splitting a multi-layer receiver into two sub-receivers for independent MIMO detection can significantly reduce the complexity of MIMO reception. For example, a 6-layer receiver can be split into two 3-layer sub-receivers, and an 8-layer receiver can be split into two 4-layer sub-receivers. Each sub-receiver corresponds to an antenna group. As shown in Figure 2, the base station can generate two beams using multiple antennas. Antenna group 0 on the terminal device side can receive the data and reference signals transmitted on beam 0, while antenna group 1 can receive the data and reference signals transmitted on beam 1.

[0080] For the above receiver structure, in specific implementation, various receiver types can be derived according to different functional division methods:

[0081] Type 1: The antenna, radio frequency front-end (RFE), and baseband processing functions of the two sub-receivers are completely independent, as shown in Figure 3A.

[0082] The advantage of this type is that an 8-layer receiver can be easily constructed using two existing 4-layer receivers.

[0083] Type 2: Two sub-receivers share the channel decoding function, while the antenna, RFE, and other baseband processing functions are completely independent, as shown in Figure 3B.

[0084] When the base station schedules a physical downlink shared channel (PDSCH) using two-layer transmission and indicates the reception strategy as follows: antenna group 1 receives one layer and antenna group 2 receives the other layer, according to current protocol regulations, since the number of transmission layers does not exceed four, only one codeword (CW) is carried on the PDSCH.

[0085] For Type 1, since its functions are completely independent, both channel decoding modules can only obtain partial bits of the CW, making it impossible to fully decode the CW. To address this issue, the protocol needs to be enhanced. However, for Type 2, since both channels share the channel decoding module, all bits of the CW can be obtained, thus completing the decoding without requiring additional protocol enhancements.

[0086] Therefore, the advantage of Type 2 is that it can reuse existing protocols to a large extent, or make minor changes to the protocols.

[0087] Type 3: This type has basically the same functional structure as a conventional 8-layer receiver, as shown in Figure 3C. The difference is that this type introduces restrictions in the MIMO equalization module. For PDSCHs with more than 4 transmission layers, MIMO equalization is performed independently on two antenna groups (the same as Type 1 and Type 2). For PDSCHs with ≤4 transmission layers, MIMO equalization is performed jointly on two antenna groups (the same as a conventional 8Rx receiver).

[0088] The advantage of this type is that it reduces the complexity of MIMO equalization for transmission layers greater than 4, while maintaining the performance of MIMO equalization for transmission layers ≤ 4.

[0089] The number of transmission layers can also be called rank.

[0090] For different receiver structures, the scheduling instructions of the base station are different, for example:

[0091] For type 1: When rank > 1, PDSCH always carries 2CW;

[0092] For type 2 / 3: when rank ≤ 4, PDSCH carries 1 CW; when rank > 4, PDSCH carries 2 CWs.

[0093] 2. Demodulation reference signal (DMRS) configuration type

[0094] NR supports two DMRS configuration types: DMRS configuration type 1 and DMRS configuration type 2.

[0095] DMRS configuration type 1 includes two code division multiplexing (CDM) groups and supports up to eight DMRS ports. The specific resource element (RE) structure can be shown in Figure 4A, with symbols on the horizontal axis and subcarriers on the vertical axis. CDM group 0 carries DMRS ports 0, 1, 4, and 5; CDM group 1 carries DMRS ports 2, 3, 6, and 7.

[0096] DMRS configuration type 2 includes three CDM groups and supports up to 12 DMRS ports. The specific RE structure can be shown in Figure 4B, with the horizontal axis representing symbols and the vertical axis representing subcarriers. CDM group 0 carries DMRS ports 0, 1, 6, and 7; CDM group 1 carries DMRS ports 2, 3, 8, and 9; and CDM group 2 carries DMRS ports 4, 5, 10, and 11.

[0097] 3. Currently, when scheduling a terminal device, the base station can use the antenna port field in the downlink control information (DCI) to indicate the DMRS port, as shown in Table 1 and Table 2:

[0098] Table 1 DMRS port allocation method when a maximum of 2 symbols are configured under DMRS configuration type 1 (Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=2)

[0099] Table 2 DMRS port allocation method when a maximum of 2 symbols are configured under DMRS configuration type 2 (Antenna port(s) (1000+DMRS port), dmrs-Type=2, maxLength=2)

[0100] To achieve spatial multiplexing gain, two antenna groups are typically placed far apart, such as at the top and bottom of the terminal. This means that the channel characteristics (such as fading and Doppler) corresponding to these two antenna groups may differ significantly. For receiver type 1, independent MIMO equalization is used for the two antenna groups to reduce complexity. Compared to conventional joint MIMO equalization, this independent MIMO equalization is more sensitive to interference between antenna groups.

[0101] Based on the above technical problems, an embodiment of the present application provides a communication method, the main inventive idea of ​​which is as follows: a network device determines multiple indication information, each indication information is used to indicate the identification of information, the information is any information among the multiple information, the information indicates whether the DMRS port corresponding to any antenna group in the multiple antenna groups or the CDM group corresponding to the antenna group is occupied, the DMRS port corresponding to the antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups; sends multiple indication information, when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups that do not carry data, or sends first indication information, the first indication information is used to indicate the number of CDM groups that do not carry data. Since the DMRS port corresponding to each antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups, the impact of interference between antenna groups on channel estimation can be reduced; in addition, the interference strength caused by other antenna groups can be accurately estimated on each antenna group, so that the interference between antenna groups can be more effectively suppressed in MIMO equalization processing, thereby improving performance.

[0102] The technical solutions shown in this application are described in detail below through specific embodiments. It should be noted that the following embodiments can exist independently or in combination with each other. For the same or similar content, such as the explanation of terms or nouns, and the explanation of steps, etc., different embodiments can refer to each other and will not be repeated.

[0103] FIG5 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG5 , the communication method includes:

[0104] S501: A network device determines a plurality of indication information.

[0105] Each indication information is used to indicate the identification of information, and the information is any information among multiple information. The information indicates whether the DMRS port corresponding to any antenna group among multiple antenna groups or the CDM group corresponding to the antenna group is occupied. The DMRS port corresponding to the antenna group is located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups.

[0106] The terminal device includes multiple antenna groups, and the multiple antenna groups can be receiving antenna groups of the terminal device, that is, antenna groups used by the terminal device to receive downlink data.

[0107] For any antenna group, the DMRS port corresponding to the antenna group may be the DMRS port corresponding to the transmission layer corresponding to the antenna group.

[0108] The identification of the information can be indicated by a bit field value (value) indicating the information.

[0109] The number of indication information is the same as the number of receiving antenna groups of the terminal device, and each indication information indicates whether the DMRS port corresponding to any antenna group among the multiple antenna groups or the CDM group corresponding to the antenna group is occupied.

[0110] For example, if the number of indication information is N, where N is a positive integer greater than 1, the first indication information indicates whether the DMRS port corresponding to the first antenna group or the CDM group corresponding to the first antenna group is occupied, and the DMRS port corresponding to the first antenna group is located in the first CDM group; the second indication information indicates whether the DMRS port corresponding to the second antenna group or the CDM group corresponding to the second antenna group is occupied, and the DMRS port corresponding to the second antenna group is located in the second CDM group, and so on. The Nth indication information indicates whether the DMRS port corresponding to the Nth antenna group or the CDM group corresponding to the Nth antenna group is occupied, and the DMRS port corresponding to the Nth antenna group is located in the Nth CDM group.

[0111] It should be noted that the N indication information corresponds one-to-one to the N antenna groups, and the N antenna groups correspond one-to-one to the N CDM groups. The above example only illustrates one correspondence relationship. This application does not limit the specific correspondence relationship, as long as the one-to-one correspondence is guaranteed. For example, the first indication information can also indicate whether the DMRS port corresponding to the N-th antenna group or the CDM group corresponding to the N-th antenna group is occupied, and the DMRS port corresponding to the N-th antenna group is located in the first CDM group; the second indication information indicates whether the DMRS port corresponding to the N-1-th antenna group or the CDM group corresponding to the N-1-th antenna group is occupied, and the DMRS port corresponding to the N-1-th antenna group is located in the second CDM group, and so on. The N-th indication information indicates whether the DMRS port corresponding to the 1st antenna group or the CDM group corresponding to the 1st antenna group is occupied, and the DMRS port corresponding to the 1st antenna group is located in the N-th CDM group.

[0112] The CDM group corresponding to the antenna group may refer to the CDM group where the DMRS port corresponding to the antenna group is located.

[0113] In a possible implementation, each information further indicates the number of transmission layers corresponding to the corresponding antenna group, that is, each information may further indicate the DMRS port corresponding to any antenna group among the multiple antenna groups and the number of transmission layers corresponding to the antenna group.

[0114] Each piece of information may implicitly indicate the number of transmission layers corresponding to the corresponding antenna group, or may explicitly indicate the number of transmission layers corresponding to the corresponding antenna group.

[0115] The number of DMRS ports corresponding to an antenna group is the same as the number of transmission layers corresponding to the antenna group.

[0116] In a possible implementation, each piece of information may further indicate the number of symbols occupied by the pre-DMRS (number of front-load symbols).

[0117] The following describes how to indicate the number of CDM groups without data in three cases.

[0118] Case 1: A field value is introduced into the bit field of each indication information to indicate whether the CDM group corresponding to the corresponding antenna group is occupied.

[0119] In this case, some of the multiple information indicates the DMRS port corresponding to the antenna group, and some of the information indicates whether the CDM group corresponding to the antenna group is occupied. For any one of the multiple information, any of the following items can be indicated:

[0120] (1) DMRS ports corresponding to any antenna group among multiple antenna groups;

[0121] (2) The DMRS port corresponding to any antenna group among the multiple antenna groups and the number of symbols occupied by the pre-DMRS;

[0122] (3) The DMRS port corresponding to any antenna group of multiple antenna groups and the number of transmission layers corresponding to the antenna group;

[0123] (4) The DMRS port corresponding to any antenna group of multiple antenna groups, the number of transmission layers corresponding to the antenna group, and the number of symbols occupied by the pre-DMRS;

[0124] (5) Whether the CDM corresponding to any antenna group among multiple antenna groups is occupied;

[0125] (6) Whether the CDM corresponding to any antenna group among the multiple antenna groups is occupied and the number of symbols occupied by the pre-DMRS.

[0126] Case 2: A set of field values ​​is introduced into the bit field of a certain indication information to indicate the number of CDM groups without data.

[0127] In this case, the indication information may indicate any of the following:

[0128] (1) The number of DMRS ports corresponding to any antenna group and the number of CDM groups without data among multiple antenna groups;

[0129] (2) the DMRS port corresponding to any antenna group among the multiple antenna groups, the number of transmission layers corresponding to the antenna group, and the number of CDM groups without data;

[0130] (3) The DMRS port corresponding to any antenna group among the multiple antenna groups, the number of symbols occupied by the pre-DMRS, and the number of CDM groups without data;

[0131] (4) The DMRS port corresponding to any antenna group among the multiple antenna groups, the number of transmission layers corresponding to the antenna group, the number of symbols occupied by the pre-DMRS, and the number of CDM groups without data.

[0132] Other indication information, i.e., indication information other than the specified indication information among the multiple indication information, may indicate any of the following:

[0133] (1) DMRS ports corresponding to any antenna group among multiple antenna groups;

[0134] (2) The number of DMRS ports corresponding to any antenna group among the multiple antenna groups is 0;

[0135] (3) the DMRS port corresponding to any antenna group among the multiple antenna groups and the number of transmission layers corresponding to the antenna group;

[0136] (4) The number of DMRS ports corresponding to any antenna group among the multiple antenna groups and the number of transmission layers corresponding to the antenna group are 0;

[0137] (5) The DMRS port corresponding to any antenna group among the multiple antenna groups and the number of symbols occupied by the pre-DMRS;

[0138] (6) The number of DMRS ports corresponding to any antenna group in the multiple antenna groups is 0 and the number of symbols occupied by the pre-DMRS;

[0139] (7) The DMRS port corresponding to any antenna group among the multiple antenna groups, the number of transmission layers corresponding to the antenna group, and the number of symbols occupied by the pre-DMRS;

[0140] (8) The number of DMRS ports corresponding to any antenna group among the multiple antenna groups and the number of transmission layers corresponding to the antenna group is 0 and the number of symbols occupied by the pre-DMRS.

[0141] Case 3: A separate indication information is introduced to indicate the number of CDM groups without data. This indication information can be called first indication information.

[0142] In this case, the content indicated by any one of the multiple information can refer to the content indicated by other indication information in the above situation 2, and will not be repeated here.

[0143] For ease of understanding, the following specific explanation is given by taking the example where the number of indication information is 2 (correspondingly, the number of receiving antenna groups of the terminal device is 2), that is, multiple indication information includes second indication information and third indication information.

[0144] The second indication information can be used to indicate the identifier of the first information, where the first information is any information among multiple first information, and the first information indicates the DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group.

[0145] The third indication information can be used to indicate the identifier of the second information, where the second information is any information among multiple second information, and the second information indicates the DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

[0146] The first antenna group may be any one of the two receiving antenna groups of the terminal device, and the second antenna group may be an antenna group other than the first antenna group of the two receiving antenna groups of the terminal device.

[0147] In a possible implementation, the first CDM group may be any CDM group in DMRS configuration type 1, and the second CDM group may be a CDM group in DMRS configuration type 1 except the first CDM group.

[0148] For example, the first CDM group may be CDM group 0 in DMRS configuration type 1, and the second CDM group may be CDM group 1 in DMRS configuration type 1.

[0149] In this example, the DMRS port corresponding to the first antenna group can be at least one of the DMRS ports corresponding to CDM group 0 in DMRS configuration type 1, and the DMRS port corresponding to the second antenna group can be at least one of the DMRS ports corresponding to CDM group 1 in DMRS configuration type 1.

[0150] In another example, the first CDM group may be CDM group 1 in DMRS configuration type 1, and the second CDM group may be CDM group 0 in DMRS configuration type 1.

[0151] In this example, the DMRS port corresponding to the first antenna group can be at least one of the DMRS ports corresponding to CDM group 1 in DMRS configuration type 1, and the DMRS port corresponding to the second antenna group can be at least one of the DMRS ports corresponding to CDM group 0 in DMRS configuration type 1.

[0152] In this implementation, the multiple first information and the multiple second information can be described through the following three situations.

[0153] Case 1: Part of the information in the multiple first information indicates the DMRS port corresponding to the first antenna group, and part of the information indicates whether the CDM group corresponding to the first antenna group is occupied, that is, any one of the multiple first information indicates whether the DMRS port corresponding to the first antenna group or the CDM group corresponding to the first antenna group is occupied; part of the information in the multiple second information indicates the DMRS port corresponding to the second antenna group, and part of the information indicates whether the CDM group corresponding to the second antenna group is occupied, that is, any one of the multiple second information indicates whether the DMRS port corresponding to the second antenna group or the CDM group corresponding to the second antenna group is occupied.

[0154] The multiple first information may be as shown in Table 3, and the multiple second information may be as shown in Table 4.

[0155] Table 3 DMRS port index indication of the first antenna group when DMRS configuration type 1 is adopted (1 st Antenna port(s)(1000+DMRS port),dmrs-Type=1,maxLength=2)

[0156] Each second indication information may indicate a bit field value in Table 3. "Reserved but None" indicates that the CDM group corresponding to the first antenna group is occupied, that is, the corresponding time-frequency resources are not used for data transmission, and no DMRS port in the CDM group is used. "Not Reserved" indicates that the CDM group corresponding to the first antenna group is not occupied, that is, the corresponding time-frequency resources can be used for data transmission.

[0157] Table 4 DMRS port index indication of the second antenna group when DMRS configuration type 1 is adopted (2 nd Antenna port(s)(1000+DMRS port),dmrs-Type=1,maxLength=2)

[0158] Each third indication information may indicate a bit field value in Table 4. "Reserved but None" indicates that the CDM group corresponding to the second antenna group is occupied, that is, the corresponding time-frequency resources are not used for data transmission, and no DMRS port in the CDM group is used. "Not Reserved" indicates that the CDM group corresponding to the second antenna group is not occupied, that is, the corresponding time-frequency resources can be used for data transmission.

[0159] It should be noted that Table 3 and Table 4 are only examples. Table 3 may also be the DMRS port index indication of the second antenna group when DMRS configuration type 1 is adopted, and Table 4 may also be the DMRS port index indication of the first antenna group when DMRS configuration type 1 is adopted; the DMRS port index indication when DMRS configuration type 1 is adopted may also be a part of Table 3 or Table 4; Table 3 or a part of Table 3 may be combined with Table 4, and Table 3 or a part of Table 3 may also be combined with a part of Table 4. The combined table may also be combined with other tables (such as an existing DMRS port index indication table) or content, Table 3 or a part of Table 3 may also be combined with other tables or content, and Table 4 or a part of Table 4 may also be combined with other tables or content. The present application does not limit the specific form of Table 3 and Table 4. As long as at least one of Table 3, a part of Table 3, Table 4 or a part of Table 4 is included, it is the protection object of the present application.

[0160] Case 2: Any one of the multiple first information indicates the DMRS port corresponding to the first antenna group and the number of CDM groups with no data, and any one of the multiple second information indicates the DMRS port corresponding to the second antenna group; or, any one of the multiple first information indicates the DMRS port corresponding to the first antenna group, and any one of the multiple second information indicates the DMRS port corresponding to the second antenna group and the number of CDM groups with no data.

[0161] The multiple first information may be as shown in Table 5, and the multiple second information may be as shown in Table 6.

[0162] Table 5 DMRS port index indication of the first antenna group when DMRS configuration type 1 is adopted (1 st Antenna port(s)(1000+DMRS port),dmrs-Type=1,maxLength=2)

[0163] Each second indication information may indicate a bit field value in Table 5. "None" indicates that no DMRS port is indicated, that is, the number of DMRS ports corresponding to the first antenna group is 0.

[0164] Table 6 DMRS port index indication of the second antenna group when DMRS configuration type 1 is adopted (2 ndAntenna port(s)(1000+DMRS port),dmrs-Type=1,maxLength=2)

[0165] Each third indication information may indicate a bit field value in Table 6. "None" indicates that no DMRS port is indicated, that is, the number of DMRS ports corresponding to the second antenna group is 0.

[0166] The second indication information and the third indication information cannot indicate "none" at the same time. When the number of CDM groups with no data in Table 5 is 1, one of the second indication information and the third indication information must indicate "none".

[0167] It should be noted that Table 5 and Table 6 are only examples. Table 5 may also be the DMRS port index indication of the second antenna group when DMRS configuration type 1 is adopted, and Table 6 may also be the DMRS port index indication of the first antenna group when DMRS configuration type 1 is adopted; the DMRS port index indication when DMRS configuration type 1 is adopted may also be a part of Table 5 or Table 6; Table 5 or a part of Table 5 may be combined with Table 6, and Table 5 or a part of Table 5 may also be combined with a part of Table 6. The combined table may also be combined with other tables (such as an existing DMRS port index indication table) or content, Table 5 or a part of Table 5 may also be combined with other tables or content, and Table 6 or a part of Table 6 may also be combined with other tables or content. The present application does not limit the specific form of Table 5 and Table 6. As long as at least one item of Table 5, a part of Table 5, Table 6 or a part of Table 6 is included, it is the protection object of the present application.

[0168] Case 3: The first indication information is introduced to indicate the number of CDM groups with no data, the second indication information indicates the DMRS port corresponding to the first antenna group, or the number of DMRS ports corresponding to the first antenna group is 0; the third indication information indicates the DMRS port corresponding to the second antenna group, or the number of DMRS ports corresponding to the first antenna group is 0.

[0169] The number of DMRS ports corresponding to the first antenna group and the number of DMRS ports corresponding to the second antenna group are both different and 0.

[0170] The number of CDM groups without data may be as shown in Table 7, the plurality of first information may be as shown in Table 8, and the plurality of second information may be as shown in Table 6.

[0171] Table 7 Number of CDM groups with no data

[0172] Among them, the first indication information can indicate the bit field value in Table 7.

[0173] Table 8 DMRS port index indication of the first antenna group when DMRS configuration type 1 is adopted (1 st Antenna port(s)(1000+DMRS port),dmrs-Type=1,maxLength=2)

[0174] Each second indication information may indicate a bit field value in Table 8. "None" indicates that no DMRS port is indicated, that is, the number of DMRS ports corresponding to the first antenna group is 0.

[0175] When the number of CDM groups with no data in Table 7 is 1, the second indication information and the third indication information cannot indicate "none" at the same time; when the number of CDM groups with no data in Table 7 is 2, neither the second indication information nor the third indication information can indicate "none".

[0176] It should be noted that Table 7, Table 8 and Table 6 are only examples. Table 8 can also be the DMRS port index indication of the second antenna group when DMRS configuration type 1 is adopted, and Table 6 can also be the DMRS port index indication of the first antenna group when DMRS configuration type 1 is adopted; the DMRS port index indication when DMRS configuration type 1 is adopted can also be a part of Table 8 or Table 6; Table 8 or a part of Table 8 can be combined with Table 6, and Table 8 or a part of Table 8 can also be combined with a part of Table 6. The combined table can also be combined with other tables (such as the existing DMRS port index indication table) or content, Table 8 or a part of Table 8 can also be combined with other tables or content, and Table 6 or a part of Table 6 can also be combined with other tables or content. The present application is not limited to the specific form of Table 8 and Table 6. As long as at least one item of Table 8, a part of Table 8, Table 6 or a part of Table 6 is included, it is the protection object of the present application.

[0177] In a possible implementation, the first CDM group may be any CDM group in DMRS configuration type 2, and the second CDM group may be any CDM group in DMRS configuration type 2 except the first CDM group.

[0178] For example, the first CDM group may be CDM group 0 in DMRS configuration type 2, and the second CDM group may be CDM group 1 or 2 in DMRS configuration type 2.

[0179] In this example, the DMRS port corresponding to the first antenna group can be at least one of the DMRS ports corresponding to CDM group 0 in DMRS configuration type 2; the DMRS port corresponding to the second antenna group can be at least one of the DMRS ports corresponding to CDM group 1 in DMRS configuration type 2, or the DMRS port corresponding to the second antenna group can be at least one of the DMRS ports corresponding to CDM group 2 in DMRS configuration type 2.

[0180] In another example, the first CDM group may be CDM group 1 in DMRS configuration type 2, and the second CDM group may be CDM group 0 or 2 in DMRS configuration type 2.

[0181] In this example, the DMRS port corresponding to the first antenna group can be at least one of the DMRS ports corresponding to CDM group 1 in DMRS configuration type 2; the DMRS port corresponding to the second antenna group can be at least one of the DMRS ports corresponding to CDM group 0 in DMRS configuration type 2, or the DMRS port corresponding to the second antenna group can be at least one of the DMRS ports corresponding to CDM group 2 in DMRS configuration type 2.

[0182] In another example, the first CDM group may be CDM group 2 in DMRS configuration type 2, and the second CDM group may be CDM group 0 or 1 in DMRS configuration type 2.

[0183] In this example, the DMRS port corresponding to the first antenna group can be at least one of the DMRS ports corresponding to CDM group 2 in DMRS configuration type 2; the DMRS port corresponding to the second antenna group can be at least one of the DMRS ports corresponding to CDM group 0 in DMRS configuration type 2, or the DMRS port corresponding to the second antenna group can be at least one of the DMRS ports corresponding to CDM group 1 in DMRS configuration type 2.

[0184] In this implementation, the multiple first information and the multiple second information can be described through the following three situations.

[0185] Case 1: Part of the information in the multiple first information indicates the DMRS port corresponding to the first antenna group, and part of the information indicates whether the CDM group corresponding to the first antenna group is occupied, that is, any one of the multiple first information indicates whether the DMRS port corresponding to the first antenna group or the CDM group corresponding to the first antenna group is occupied; part of the information in the multiple second information indicates the DMRS port corresponding to the second antenna group, and part of the information indicates whether the CDM group corresponding to the second antenna group is occupied, that is, any one of the multiple second information indicates whether the DMRS port corresponding to the second antenna group or the CDM group corresponding to the second antenna group is occupied.

[0186] Multiple first information and multiple second information can be shown in any two of Table 9, Table 10 or Table 11 respectively. For example, multiple first information can be shown in Table 9, and multiple second information can be shown in Table 10; or multiple first information can be shown in Table 9, and multiple second information can be shown in Table 11; or multiple first information can be shown in Table 10, and multiple second information can be shown in Table 9; or multiple first information can be shown in Table 10, and multiple second information can be shown in Table 11; or multiple first information can be shown in Table 11, and multiple second information can be shown in Table 9; or multiple first information can be shown in Table 11, and multiple second information can be shown in Table 10.

[0187] Table 9 DMRS port index indication of the antenna group when DMRS configuration type 2 is used (Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=2)

[0188] Each second indication information or each third indication information may indicate a bit field value in Table 9. "Reserved but None" indicates that the CDM group corresponding to the antenna group is occupied, that is, the corresponding time-frequency resources are not used for data transmission, and no DMRS port in the CDM group is used. "Not Reserved" indicates that the CDM group corresponding to the antenna group is not occupied, that is, the corresponding time-frequency resources can be used for data transmission.

[0189] Table 10 DMRS port index indication of the antenna group when DMRS configuration type 2 is used (Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=2)

[0190] Each second indication information or each third indication information may indicate a bit field value in Table 10. "Reserved but None" indicates that the CDM group corresponding to the antenna group is occupied, that is, the corresponding time-frequency resources are not used for data transmission, and no DMRS port in the CDM group is used. "Not Reserved" indicates that the CDM group corresponding to the antenna group is not occupied, that is, the corresponding time-frequency resources can be used for data transmission.

[0191] Table 11 DMRS port index indication of the antenna group when DMRS configuration type 2 is used (Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=2)

[0192] Each second indication information or each third indication information may indicate a bit field value in Table 10. "Reserved but None" indicates that the CDM group corresponding to the antenna group is occupied, that is, the corresponding time-frequency resources are not used for data transmission, and no DMRS port in the CDM group is used. "Not Reserved" indicates that the CDM group corresponding to the antenna group is not occupied, that is, the corresponding time-frequency resources can be used for data transmission.

[0193] It should be noted that Table 9, Table 10 and Table 11 are only examples. The DMRS port index indication when DMRS configuration type 2 is used may also be part of Table 9, Table 10 or Table 11; Table 9, Table 10 and Table 11 can be combined, part of Table 9, Table 10 and Table 11 can be combined, part of Table 9, part of Table 10 and Table 11 can be combined, part of Table 9, part of Table 10 and Table 11 can be combined, part of Table 9, Table 10 and Table 11 can be combined, part of Table 9, Table 10 and Table 11 can be combined, part of Table 9, Table 10 and Table 11 can be combined, part of Table 9, Table 10 and Table 11 can be combined, The part in Table 10 and the part in Table 11 can be combined; the combined table can also be combined with other tables (such as the existing DMRS port index indication table) or content, Table 9 or the part in Table 9 can also be combined with other tables or content, Table 10 or the part in Table 10 can also be combined with other tables or content, Table 11 or the part in Table 11 can also be combined with other tables or content. The present application does not limit the specific form of Table 9, Table 10 and Table 11. As long as it includes at least one item of Table 9, the part in Table 9, Table 10, the part in Table 10, Table 11 or the part in Table 11, it is the protection object of this application.

[0194] In this case, whether the third CDM group is occupied can be configured by radio resource control (RRC) or predefined by the protocol. The third CDM group refers to the antenna group other than the CDM group corresponding to the first antenna group and the CDM group corresponding to the second antenna group.

[0195] Case 2: Any one of the multiple first information indicates the DMRS port corresponding to the first antenna group and the number of CDM groups with no data, and any one of the multiple second information indicates the DMRS port corresponding to the second antenna group; or, any one of the multiple first information indicates the DMRS port corresponding to the first antenna group, and any one of the multiple second information indicates the DMRS port corresponding to the second antenna group and the number of CDM groups with no data.

[0196] The multiple first information may be as shown in Table 12, and the multiple second information may be as shown in Table 13 or Table 14; or the multiple second information may be as shown in Table 12, and the multiple first information may be as shown in Table 13 or Table 14.

[0197] Table 12 DMRS port index indication of antenna group when DMRS configuration type 2 (Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=2)

[0198] Each second indication information or each third indication information may indicate a bit field value in Table 12. "None" indicates that no DMRS port is indicated, that is, the number of DMRS ports corresponding to the antenna group is 0.

[0199] Table 13 DMRS port index indication of the antenna group when DMRS configuration type 2 is used (Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=2)

[0200] Each second indication information or each third indication information may indicate a bit field value in Table 13. "None" indicates that no DMRS port is indicated, that is, the number of DMRS ports corresponding to the antenna group is 0.

[0201] Table 14 DMRS port index indication for the antenna group when DMRS configuration type 2 is used (Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=2)

[0202] Each second indication information or each third indication information may indicate a bit field value in Table 14. "None" indicates that no DMRS port is indicated, that is, the number of DMRS ports corresponding to the antenna group is 0.

[0203] The second indication information and the third indication information cannot indicate "none" at the same time. When the number of CDM groups with no data in Table 12 is 1, one of the second indication information and the third indication information must indicate "none".

[0204] It should be noted that Table 12, Table 13 and Table 14 are only examples. The DMRS port index indication when DMRS configuration type 2 is adopted may also be part of Table 12, Table 13 and Table 14; Table 12, Table 13 and Table 14 can be combined, the part in Table 12, Table 13 and Table 14 can be combined, the part in Table 12, Table 13 and Table 14 can be combined, the part in Table 12, Table 13 and Table 14 can be combined, the part in Table 12, Table 13 and Table 14 can be combined, the part in Table 12, Table 13 and Table 14 can be combined, the part in Table 12, Table 13 and Table 14 can be combined, the part in Table 12, Table 13 and Table 14 can be combined, the part in Table 14, Table 12 and Table 13 can be combined, The parts in Table 2, the parts in Table 13 and the parts in Table 14 can be combined; the combined tables can also be combined with other tables (such as the existing DMRS port index indication table) or content, Table 12 or the parts in Table 12 can also be combined with other tables or content, Table 13 or the parts in Table 13 can also be combined with other tables or content, Table 14 or the parts in Table 14 can also be combined with other tables or content. This application does not limit the specific forms of Tables 12, 13 and 14. As long as it includes at least one item of Table 12, the parts in Table 12, Table 13, the parts in Table 13, Table 14 or the parts in Table 14, it is the protection object of this application.

[0205] Case 3: The first indication information is introduced to indicate the number of CDM groups with no data, the second indication information indicates the DMRS port corresponding to the first antenna group, or the number of DMRS ports corresponding to the first antenna group is 0; the third indication information indicates the DMRS port corresponding to the second antenna group, or the number of DMRS ports corresponding to the first antenna group is 0.

[0206] The number of DMRS ports corresponding to the first antenna group and the number of DMRS ports corresponding to the second antenna group are both different and 0.

[0207] The number of CDM groups without data may be as shown in Table 7, and the plurality of first information and the plurality of second information may be as shown in any two of Table 15, Table 13, or Table 14. For example, the plurality of first information may be as shown in Table 15, and the plurality of second information may be as shown in Table 13; or the plurality of first information may be as shown in Table 15, and the plurality of second information may be as shown in Table 14; or the plurality of first information may be as shown in Table 13, and the plurality of second information may be as shown in Table 15; or the plurality of first information may be as shown in Table 13, and the plurality of second information may be as shown in Table 14; or the plurality of first information may be as shown in Table 14, and the plurality of second information may be as shown in Table 15; or the plurality of first information may be as shown in Table 14, and the plurality of second information may be as shown in Table 13.

[0208] Table 15 DMRS port index indication of antenna group when DMRS configuration type 2 (Antenna port(s) (1000+DMRS port), dmrs-Type=1, maxLength=2)

[0209] Each second indication information or each third indication information may indicate a bit field value in Table 15. "None" indicates that no DMRS port is indicated, that is, the number of DMRS ports corresponding to the antenna group is 0.

[0210] It should be noted that Table 15, Table 13 and Table 14 are only examples. The DMRS port index indication when DMRS configuration type 2 is used may also be part of Table 15, Table 13 and Table 14; Table 15, Table 13 and Table 14 can be combined, the part in Table 15, Table 13 and Table 14 can be combined, Table 15, the part in Table 13 and Table 14 can be combined, the part in Table 15, the part in Table 13 and Table 14 can be combined, the part in Table 15, Table 13 and Table 14 can be combined, the part in Table 15, Table 13 and Table 14 can be combined, the part in Table 15, Table 13 and Table 14 can be combined, the part in Table 15, Table 13 and Table 14 can be combined, the part in Table 15, Table 13 and Table 14 can be combined, and the part in Table 14 can be combined. The parts in Table 5, the parts in Table 13 and the parts in Table 14 can be combined; the combined table can also be combined with other tables (such as the existing DMRS port index indication table) or content, Table 15 or the parts in Table 15 can also be combined with other tables or content, Table 13 or the parts in Table 13 can also be combined with other tables or content, Table 14 or the parts in Table 14 can also be combined with other tables or content. This application does not limit the specific form of Table 15, Table 13 and Table 14. As long as it includes at least one item of Table 15, the part in Table 15, Table 13, the part in Table 13, Table 14 or the part in Table 14, it is the protection object of this application.

[0211] S502: The network device sends multiple indication information to the terminal device.

[0212] In other words, the terminal device receives multiple indication information sent by the network device.

[0213] It should be noted that, in the embodiment of the present application, the baseband processing function modules of different antenna groups of the terminal device are different. That is, the receiver type of the terminal device in the embodiment of the present application is type 1.

[0214] The multiple indication information may be carried in downlink control information (DCI), a media access control (MAC) control element (CE) or an RRC message, which is not limited in this application.

[0215] Exemplarily, if the multiple indication information includes second indication information and third indication information, the second indication information can be carried in the first antenna port field of the DCI, and the third indication information can be carried in the second antenna port field of the DCI.

[0216] When the indication method of case 3 in S501 is used to indicate the number of CDM groups without data, S503 may also be executed.

[0217] S503: The network device sends first indication information to the terminal device.

[0218] In other words, the terminal device receives the first indication information sent by the network device.

[0219] The first indication information can be carried in DCI, MAC CE or RRC message, which is not limited in this application.

[0220] After receiving multiple indication information, the terminal device can determine the corresponding DMRS port on each antenna group based on the multiple indication information, and then receive the DMRS transmitted on the corresponding DMRS port through the antenna group.

[0221] In the embodiment shown in FIG5 , since the DMRS ports corresponding to each antenna group are located in the same CDM group, and the DMRS ports corresponding to different antenna groups are located in different CDM groups, the impact of interference between antenna groups on channel estimation can be reduced; in addition, the interference intensity caused by other antenna groups can be accurately estimated on each antenna group, so that the interference between antenna groups can be more effectively suppressed in MIMO equalization processing, thereby improving performance.

[0222] FIG6 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in FIG6, the communication device 600 includes: a receiving module 601, configured to receive multiple indication information, each indication information being used to identify an indication information, the information being any information among the multiple information, the information indicating whether a DMRS port corresponding to any antenna group among multiple antenna groups or a CDM group corresponding to the antenna group is occupied, the DMRS ports corresponding to the antenna group being located in the same CDM group, and the DMRS ports corresponding to different antenna groups being located in different CDM groups; when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups without data, or receives first indication information, the first indication information being used to indicate the number of CDM groups without data.

[0223] In a possible implementation, the information further indicates the number of transmission layers corresponding to the antenna group.

[0224] In a possible implementation, the number of transmission layers corresponding to an antenna group is the same as the number of DMRS ports corresponding to the antenna group.

[0225] In a possible implementation, the information further indicates the number of symbols occupied by the preamble DMRS.

[0226] In a possible implementation, different antenna groups have different baseband processing function modules.

[0227] In one possible implementation, the multiple indication information includes second indication information and third indication information, the second indication information is used to indicate the identifier of the first information, and the third indication information is used to indicate the identifier of the second information, wherein the first information is any information among the multiple first information, the first information indicates the DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group; the second information is any information among the multiple second information, the second information indicates the DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

[0228] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 1; the second CDM group is a CDM group in DMRS configuration type 1 except the first CDM group.

[0229] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 2; the second CDM group is any CDM group in DMRS configuration type 2 except the first CDM group.

[0230] In a possible implementation, multiple indication information is carried in a DCI, a MAC CE or an RRC message.

[0231] In a possible implementation manner, the first indication information is carried in a DCI, a MAC CE or an RRC message.

[0232] In a possible implementation, the multiple antenna groups are receiving antenna groups of the terminal device.

[0233] The communication device 600 provided in this embodiment is used to implement the technical solution of the terminal device in the aforementioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0234] FIG7 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. As shown in FIG7 , the communication device 700 includes: a determination module 701, configured to determine a plurality of indication information, each indication information being used to identify an indication information, the information being any information among the plurality of information, the information indicating whether a DMRS port corresponding to any antenna group among the plurality of antenna groups or a CDM group corresponding to the antenna group is occupied, the DMRS ports corresponding to the antenna group being located in the same CDM group, and the DMRS ports corresponding to different antenna groups being located in different CDM groups; a sending module 702, configured to send a plurality of indication information, when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups without data, or to send a first indication information, the first indication information being used to indicate the number of CDM groups without data.

[0235] In a possible implementation, the information further indicates the number of transmission layers corresponding to the antenna group.

[0236] In a possible implementation, the number of transmission layers corresponding to an antenna group is the same as the number of DMRS ports corresponding to the antenna group.

[0237] In a possible implementation, the information further indicates the number of symbols occupied by the preamble DMRS.

[0238] In a possible implementation, different antenna groups have different baseband processing function modules.

[0239] In one possible implementation, the multiple indication information includes second indication information and third indication information, the second indication information is used to indicate the identifier of the first information, and the third indication information is used to indicate the identifier of the second information, wherein the first information is any information among the multiple first information, the first information indicates the DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group; the second information is any information among the multiple second information, the second information indicates the DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

[0240] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 1; the second CDM group is a CDM group in DMRS configuration type 1 except the first CDM group.

[0241] In a possible implementation, the first CDM group is any CDM group in DMRS configuration type 2; the second CDM group is any CDM group in DMRS configuration type 2 except the first CDM group.

[0242] In a possible implementation, multiple indication information is carried in a DCI, a MAC CE or an RRC message.

[0243] In a possible implementation manner, the first indication information is carried in a DCI, a MAC CE or an RRC message.

[0244] In a possible implementation, the multiple antenna groups are receiving antenna groups of the terminal device.

[0245] The communication device 700 provided in this embodiment is used to implement the technical solution of the network device in the aforementioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0246] Figure 8 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. As shown in Figure 8, terminal device 800 includes: a processor 801 and a memory 802; the memory 802 stores computer-executable instructions; the processor 801 executes the computer-executable instructions stored in the memory 802, causing the terminal device to implement the corresponding technical solutions in the aforementioned method embodiments. The implementation principles and technical effects are similar and will not be repeated here.

[0247] Figure 9 is a schematic diagram of the structure of a network device provided in an embodiment of the present application. As shown in Figure 9, network device 900 includes: a processor 901 and a memory 902; the memory 902 stores computer-executable instructions; the processor 901 executes the computer-executable instructions stored in the memory 902, causing the network device to implement the corresponding technical solutions in the aforementioned method embodiments. The implementation principles and technical effects are similar and will not be further described here.

[0248] The present embodiment provides a chip. The chip includes a processor configured to invoke a computer program stored in a memory to execute the technical solution of the above embodiment. The implementation principles and technical effects are similar to those of the above-mentioned related embodiments and will not be further described here.

[0249] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method steps performed by the network device in the aforementioned method embodiment are implemented.

[0250] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method steps performed by the terminal device in the aforementioned method embodiment are implemented.

[0251] An embodiment of the present application provides a computer program product, including a computer program. When the computer program is executed, the computer executes the method steps executed by the network device in the aforementioned method embodiment.

[0252] An embodiment of the present application provides a computer program product, including a computer program. When the computer program is executed, the computer executes the method steps executed by the terminal device in the aforementioned method embodiment.

[0253] The present application provides a chip or chip system, which includes at least one processor and a communication interface. The communication interface and the at least one processor are interconnected via a circuit. The at least one processor is configured to execute a computer program or instruction to execute the method steps executed by the terminal device or the method steps executed by the network device in the aforementioned method embodiment. The communication interface in the chip can be an input / output interface, a pin, or a circuit.

[0254] The methods described in the above embodiments can be implemented in whole or in part through software, hardware, firmware, or any combination thereof. If implemented in software, the functions can be stored as one or more instructions or codes on a computer-readable medium or transmitted on a computer-readable medium. Computer-readable media can include computer storage media and communication media, and can also include any medium that can transfer a computer program from one place to another. The storage medium can be any target medium that can be accessed by a computer.

[0255] In one possible implementation, computer-readable media may include RAM, ROM, compact disc read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium designed to carry or store the desired program code in the form of instructions or data structures and accessible by a computer. Furthermore, any connection is appropriately referred to as a computer-readable medium. For example, if software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technologies such as infrared, radio and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwave are included in the definition of medium. Disk and disc as used herein include optical disc, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, where disks typically reproduce data magnetically, while optical discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0256] The present application embodiment is described with reference to the flowchart and / or block diagram of the method, device (system) of the present application embodiment. It should be understood that each process and / or box in the flowchart and / or block diagram, and the combination of the process and / or box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processing unit of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable device to produce a machine, so that the instructions executed by the processing unit of the computer or other programmable data processing device produce a device for implementing the function specified in one process or multiple processes in the flowchart and / or one box or multiple boxes in the block diagram.

[0257] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the present invention should be included in the scope of protection of the present invention.

Claims

1. A communication method, characterized in that: include: receiving a plurality of indication information, the indication information being used to indicate an identifier of information, the information being any information among the plurality of information, the information indicating whether a demodulation reference signal (DMRS) port corresponding to any antenna group among the plurality of antenna groups or a code division multiplexing (CDM) group corresponding to the antenna group is occupied, the DMRS ports corresponding to the antenna groups being in the same CDM group, and the DMRS ports corresponding to different antenna groups being in different CDM groups; When the information indicates the DMRS port corresponding to the antenna group, the information further indicates the number of CDM groups without data, or first indication information is received, where the first indication information is used to indicate the number of CDM groups without data.

2. The method according to claim 1, characterized in that The information also indicates the number of transmission layers corresponding to the antenna group.

3. The method according to claim 2, characterized in that The number of transmission layers corresponding to the antenna group is the same as the number of DMRS ports corresponding to the antenna group.

4. The method according to any one of claims 1 to 3, characterized in that The information also indicates the number of symbols occupied by the preamble DMRS.

5. The method according to claim 1, wherein Different antenna groups have different baseband processing functional modules.

6. The method according to any one of claims 1 to 5, characterized in that The plurality of indication information includes second indication information and third indication information, wherein the second indication information is used to indicate the identifier of the first information, and the third indication information is used to indicate the identifier of the second information, wherein: The first information is any information among a plurality of first information, the first information indicates a DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group; The second information is any information among a plurality of second information, the second information indicates a DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

7. The method according to claim 6, characterized in that The first CDM group is any CDM group in DMRS configuration type 1; The second CDM group is a CDM group in DMRS configuration type 1 except the first CDM group.

8. The method according to claim 6, characterized in that The first CDM group is any CDM group in DMRS configuration type 2; The second CDM group is any CDM group in DMRS configuration type 2 except the first CDM group.

9. The method according to claim 1, characterized in that The multiple indication information is carried in downlink control information DCI, medium access control MAC control element CE or radio resource control RRC message.

10. The method according to claim 1, characterized in that The first indication information is carried in a DCI, a MAC CE or an RRC message.

11. The method according to claim 1, characterized in that The multiple antenna groups are receiving antenna groups of the terminal device.

12. A communication method, characterized in that: include: Determine multiple indication information, where the indication information is used to indicate an identifier of information, where the information is any information from the multiple information, and the information indicates whether a demodulation reference signal (DMRS) port corresponding to any antenna group among multiple antenna groups or a code division multiplexing (CDM) group corresponding to the antenna group is occupied, where the DMRS ports corresponding to the antenna groups are in the same CDM group, and the DMRS ports corresponding to different antenna groups are in different CDM groups; Send the multiple indication information, when the information indicates the DMRS port corresponding to the antenna group, the information also indicates the number of CDM groups without data, or send first indication information, where the first indication information is used to indicate the number of CDM groups without data.

13. The method according to claim 12, characterized in that The information also indicates the number of transmission layers corresponding to the antenna group.

14. The method according to claim 13, wherein: The number of transmission layers corresponding to the antenna group is the same as the number of DMRS ports corresponding to the antenna group.

15. The method according to any one of claims 12 to 14, characterized in that: The information also indicates the number of symbols occupied by the preamble DMRS.

16. The method according to claim 12, characterized in that Different antenna groups have different baseband processing functional modules.

17. The method according to any one of claims 12 to 16, characterized in that: The plurality of indication information includes second indication information and third indication information, wherein the second indication information is used to indicate the identifier of the first information, and the third indication information is used to indicate the identifier of the second information, wherein: The first information is any information among a plurality of first information, the first information indicates a DMRS port corresponding to the first antenna group, and the DMRS port corresponding to the first antenna group is at least one of the DMRS ports corresponding to the first CDM group; The second information is any information among a plurality of second information, the second information indicates a DMRS port corresponding to the second antenna group, and the DMRS port corresponding to the second antenna group is at least one of the DMRS ports corresponding to the second CDM group.

18. The method according to claim 17, characterized in that The first CDM group is any CDM group in DMRS configuration type 1; The second CDM group is a CDM group in DMRS configuration type 1 except the first CDM group.

19. The method according to claim 17, wherein The first CDM group is any CDM group in DMRS configuration type 2; The second CDM group is any CDM group in DMRS configuration type 2 except the first CDM group.

20. The method according to claim 17, wherein The multiple indication information is carried in downlink control information DCI, medium access control MAC control element CE or radio resource control RRC message.

21. The method according to claim 12, wherein The first indication information is carried in a DCI, a MAC CE or an RRC message.

22. The method according to claim 12, wherein: The multiple antenna groups are receiving antenna groups of the terminal device.

23. A terminal device, characterized in that: include: processor and memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the terminal device performs the method according to any one of claims 1 to 11.

24. A network device, characterized in that: include: processor and memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the network device performs the method according to any one of claims 12 to 22.

25. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 11 or the method according to any one of claims 12 to 22 is implemented.

26. A chip system, characterized in that: The method comprises at least one processor and a communication interface, wherein the communication interface and the at least one processor are interconnected via a line, and the at least one processor is used to run a computer program or instruction to execute the method according to any one of claims 1 to 11, or the method according to any one of claims 12 to 22.

27. A computer program product, characterized in that The method comprises a computer program, which, when being executed, causes a computer to execute the method according to any one of claims 1 to 11 or the method according to any one of claims 12 to 22.

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