Demodulation reference signal port indication method and device, and storage medium

Abstract

The invention relates to a demodulation reference signal port indication method and device and a storage medium, relates to the technical field of communication, and is used for improving the accuracy of channel estimation. The method comprises the following steps: receiving indication information, wherein the indication information is used for indicating a demodulation reference signal (DMRS) port allocated by network equipment for a terminal; the DMRS port corresponds to a first type of DMRS or a second type of DMRS; the lengths of orthogonal cover codes (OCC) adopted by the first type of DMRS and the second type of DMRS on a frequency domain are different.

Description

A demodulation reference signal port indication method, device and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a demodulation reference signal (DMRS) port indication method, device, and storage medium. Background Art

[0002] New Radio (NR) introduces coherent joint transmission (CJT) based on multiple transmission reception points (M-TRPs). Network devices can receive or transmit beams through multiple transmission reception points (TRPs) to provide services to terminals.

[0003] When a network device provides services to a terminal through a TRP, it allocates a DMRS port for the terminal to use for transmission. However, for CJT with multiple TRPs, how the network device allocates DMRS ports for transmission to the terminal is a problem that needs to be solved.

[0004] Summary of the Invention

[0005] To overcome the problems existing in the related art, the present disclosure provides a demodulation reference signal (DMRS) port indication method, device and storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a DMRS port indication method is provided, which is executed by a terminal, and the method includes: receiving indication information, where the indication information is used to indicate a demodulation reference signal DMRS port allocated by a network device to the terminal; the DMRS port corresponds to a first type of DMRS or a second type of DMRS; and the orthogonal cover code OCC lengths used by the first type of DMRS and the second type of DMRS in the frequency domain are different.

[0007] In one implementation, the method further includes: receiving first information, where the first information is used to indicate the second type DMRS, and the DMRS port corresponds to the second type DMRS.

[0008] In one implementation, the first type of DMRS uses a second-order orthogonal cover code OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

[0009] In one implementation, the indication information is further used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

[0010] In one implementation, the indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0011] In one embodiment, the transmission scheme includes a first transmission scheme, a second transmission scheme or a third transmission scheme; wherein the first transmission scheme is a transmission scheme based on a single transmitting and receiving point TRP; the second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers under the non-coherent joint transmission scheme of multiple TRPs are mapped to different TRPs; the third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

[0012] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table; or

[0013] The first transmission scheme and the third transmission scheme correspond to the first DMRS port table, and the second transmission scheme corresponds to the second DMRS port table; or

[0014] The first transmission scheme corresponds to the first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to the second DMRS port table.

[0015] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme and the third transmission scheme correspond to a second DMRS port table, and the indication information also includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0016] In one embodiment, the third information includes a DMRS port indication field, and the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information; or the number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by the network device configuration.

[0017] In one embodiment, the number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by the network device configuration, and the method further includes: receiving fifth information, the fifth information being used to indicate the number of available rows of the DMRS port table from the DMRS port table, and the code point indicated by the DMRS port indication field being used to indicate the DMRS port of the DMRS port table from the number of available rows of the DMRS port table.

[0018] According to a second aspect of an embodiment of the present disclosure, a DMRS port indication method is provided, which is executed by a network device, and the method includes: sending indication information, where the indication information is used to indicate a demodulation reference signal DMRS port allocated to a terminal; the DMRS port corresponds to a first type of DMRS or a second type of DMRS; the first type of DMRS and the second type of DMRS use different orthogonal cover code OCC lengths in the frequency domain.

[0019] In one implementation, the method further includes: sending first information, where the first information is used to indicate the second type DMRS, and the DMRS port corresponds to the second type DMRS.

[0020] In one implementation, the first type of DMRS uses a second-order orthogonal cover code OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

[0021] In one implementation, the indication information is used to indicate a DMRS port from different DMRS port tables, and the different DMRS port tables are determined based on a transmission scheme of the terminal.

[0022] In one implementation, the indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0023] In one embodiment, the transmission scheme includes a first transmission scheme, a second transmission scheme or a third transmission scheme; wherein the first transmission scheme is a transmission scheme based on a single transmitting and receiving point TRP; the second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of multiple TRPs; the third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

[0024] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table; or

[0025] The first transmission scheme and the third transmission scheme correspond to the first DMRS port table, and the second transmission scheme corresponds to the second DMRS port table; or

[0026] The first transmission scheme corresponds to the first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to the second DMRS port table.

[0027] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme and the third transmission scheme correspond to a second DMRS port table, and the indication information also includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0028] In one embodiment, the third information includes a DMRS port indication field, and the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information; or

[0029] The number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by network device configuration.

[0030] In one embodiment, the number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by the network device configuration, and the method further includes: sending fifth information, the fifth information being used to indicate the number of available rows of the DMRS port table from the DMRS port table, and the code point indicated by the DMRS port indication field being used to indicate the DMRS port from the number of available rows of the DMRS port table.

[0031] According to a third aspect of an embodiment of the present disclosure, a DMRS port indication device is provided, which includes: a receiving module for receiving indication information, wherein the indication information is used to indicate a demodulation reference signal DMRS port allocated by a network device to a terminal; the DMRS port corresponds to a first type of DMRS or a second type of DMRS; the orthogonal cover code OCC lengths used by the first type of DMRS and the second type of DMRS in the frequency domain are different.

[0032] In one implementation, the receiving module is further configured to receive first information, where the first information is used to indicate the second type DMRS, and the DMRS port corresponds to the second type DMRS.

[0033] In one implementation, the first type of DMRS uses a second-order orthogonal cover code OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

[0034] In one implementation, the indication information is further used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

[0035] In one implementation, the indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0036] In one embodiment, the transmission scheme includes a first transmission scheme, a second transmission scheme or a third transmission scheme; wherein the first transmission scheme is a transmission scheme based on a single transmitting and receiving point TRP; the second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of multiple TRPs; the third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

[0037] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table; or

[0038] The first transmission scheme and the third transmission scheme correspond to the first DMRS port table, and the second transmission scheme corresponds to the second DMRS port table; or

[0039] The first transmission scheme corresponds to the first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to the second DMRS port table.

[0040] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme and the third transmission scheme correspond to a second DMRS port table, and the indication information also includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0041] In one embodiment, the third information includes a DMRS port indication field, and the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information; or the number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by the network device configuration.

[0042] In one embodiment, the receiving module is further used to receive fifth information, wherein the fifth information is used to indicate the number of available rows in the DMRS port table from the DMRS port table indicated by the second information, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port from the number of available rows in the DMRS port table.

[0043] According to a fourth aspect of an embodiment of the present disclosure, a DMRS port indication device is provided, which includes: a sending module for sending indication information, wherein the indication information is used to indicate a demodulation reference signal DMRS port allocated to a terminal; the DMRS port corresponds to a first type of DMRS or a second type of DMRS; the orthogonal cover code OCC lengths used by the first type of DMRS and the second type of DMRS in the frequency domain are different.

[0044] In one implementation, the sending module is further configured to send first information, where the first information is used to indicate the second type DMRS, and the DMRS port corresponds to the second type DMRS.

[0045] In one implementation, the first type of DMRS uses a second-order orthogonal cover code OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

[0046] In one implementation, the indication information is further used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

[0047] In one implementation, the indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0048] In one embodiment, the first transmission scheme is a transmission scheme based on a single transmitting and receiving point TRP; the second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of multiple TRPs; the third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

[0049] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table; or

[0050] The first transmission scheme and the third transmission scheme correspond to the first DMRS port table, and the second transmission scheme corresponds to the second DMRS port table; or

[0051] The first transmission scheme corresponds to the first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to the second DMRS port table.

[0052] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme and the third transmission scheme correspond to a second DMRS port table, and the indication information also includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0053] In one embodiment, the third information includes a DMRS port indication field, and the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information; or

[0054] The number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by network device configuration.

[0055] In one embodiment, the sending module is used to send fifth information, wherein the fifth information is used to indicate the number of available rows in the DMRS port table from the DMRS port table indicated by the second information, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port from the number of available rows in the DMRS port table.

[0056] According to a fifth aspect of an embodiment of the present disclosure, there is provided a DMRS port indication device, including: a processor;

[0057] a memory for storing processor-executable instructions;

[0058] The processor is configured to execute the method described in the first aspect or the second aspect and any one of its embodiments.

[0059] According to a sixth aspect of an embodiment of the present disclosure, a storage medium is provided, in which instructions are stored. When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method described in the first aspect and any one of its embodiments; or when the instructions in the storage medium are executed by a processor of a network device, the network device is enabled to execute the method described in the second aspect and any one of its embodiments.

[0060] According to the seventh aspect of an embodiment of the present disclosure, a communication system is provided, comprising a terminal and a network device, wherein the terminal is used to execute the method described in the above-mentioned first aspect and any one of its embodiments; and the network device is used to execute the method described in the above-mentioned second aspect and any one of its embodiments.

[0061] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the terminal determines the DMRS port of the first type DMRS or the second type DMRS allocated to the terminal by the network device by receiving indication information, so that the terminal can determine the DMRS port used to transmit data, thereby correctly performing channel estimation and data demodulation, thereby improving the accuracy of channel estimation.

[0062] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0064] Fig. 1 is a schematic diagram of a wireless communication system according to an exemplary embodiment.

[0065] Fig. 2 is a flowchart showing a DMRS port indication method according to an exemplary embodiment.

[0066] Fig. 3 is a flowchart showing a DMRS port indication method according to an exemplary embodiment.

[0067] Fig. 4 is a flowchart showing a DMRS port indication method according to an exemplary embodiment.

[0068] Fig. 5 is a block diagram showing a DMRS port indication device according to an exemplary embodiment.

[0069] Fig. 6 is a block diagram showing a DMRS port indication device according to an exemplary embodiment.

[0070] Fig. 7 is a block diagram showing a device for DMRS port indication according to an exemplary embodiment.

[0071] Fig. 8 is a block diagram showing a device for DMRS port indication according to an exemplary embodiment. DETAILED DESCRIPTION

[0072] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure.

[0073] The DMRS port indication method provided by the embodiment of the present disclosure can be applied to the wireless communication system shown in Figure 1. Referring to Figure 1, the wireless communication system includes a network device and a terminal. The terminal is connected to the network device via wireless resources and performs data transmission.

[0074] It should be understood that the wireless communication system shown in Figure 1 is for illustrative purposes only, and the wireless communication system may also include other network devices, such as core network devices, wireless relay devices, and wireless backhaul devices, which are not shown in Figure 1. The embodiments of the present disclosure do not limit the number of network devices and terminals included in the wireless communication system.

[0075] It can be further understood that the wireless communication system of the embodiment of the present disclosure is a network that provides wireless communication functions. The wireless communication system can adopt different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), carrier sense multiple access / collision avoidance (Carrier Sense Multiple Access with Collision Avoidance). According to the capacity, rate, delay and other factors of different networks, the network can be divided into 2G (English: generation) network, 3G network, 4G network or future evolution network, such as 5G network, 5G network can also be called new radio network (New Radio, NR). For the convenience of description, the present disclosure sometimes refers to the wireless communication network as simply a network.

[0076] Furthermore, the network devices involved in the present disclosure may also be referred to as wireless access network devices. The wireless access network device may be: a base station, an evolved node B (base station), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc. It may also be a gNB in ​​an NR system, or it may also be a component or part of a base station. It should be understood that in the embodiments of the present disclosure, the specific technology and specific device form adopted by the network device are not limited. In the present disclosure, the network device can provide communication coverage for a specific geographical area and can communicate with terminals located in the coverage area (cell). In addition, when it is a vehicle-to-everything (V2X) communication system, the network device may also be a vehicle-mounted device.

[0077] Furthermore, the terminal involved in the present disclosure may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users. For example, the terminal can be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: smart phones (Mobile Phones), customer premises equipment, pocket personal computers (PPCs), handheld computers, personal digital assistants (PDAs), laptops, tablet computers, wearable devices, or vehicle-mounted devices, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device can also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0078] When a network device schedules data, such as physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) data, it needs to indicate the corresponding DMRS port to perform channel estimation and data demodulation.

[0079] Currently, network equipment supports indicating DMRS ports for terminals under non-coherent joint transmission (NC-JT) of single transmission-reception point (STRP) and multiple transmission-reception point (MTRP).

[0080] In one implementation, the network device indicates the allocated DMRS port to the terminal via an antenna port field in downlink control information (DCI).

[0081] In one implementation, a correspondence between the values ​​of the antenna port indication field and the DMRS ports is pre-designed. Hereinafter, the correspondence between the values ​​of the antenna port indication field and the DMRS ports is referred to as a DMRS port table.

[0082] For example, as shown in Table 1, Table 1 shows the correspondence between the value of the antenna port indication field and the DMRS port when the DMRS type is 1 and the symbol is single. For example, when the value of the antenna port indication field is 7, the DMRS port allocated by the network device to the terminal is {port 0, port 1}.

[0083] Table 1

[0084] In the NC-JT scenarios of STRP and MTRP, the network device indicates the assigned DMRS port to the terminal through the antenna port indication field. In existing protocols, the DMRS port table includes the STRP DMRS port table and the MTRP DMRS port table. The specific use of the STRP DMRS port table or the MTRP DMRS port table is determined by the presence of a certain code point in the activated TCI state to distinguish between the two TCI states.

[0085] In one embodiment, in the NCJT scenario of MTRP, if one TCI state is activated for all code points in the TCI domain of DCI, the DMRS port table of STRP is used; if two TCI states are activated for a code point in the TCI domain of DCI, the DMRS port table of MTRP is used.

[0086] Based on the above, network equipment only supports DMRS port indication for terminals in NC-JT scenarios with STRP and MTRP. However, in New Radio (NR), M-TRP-based Coherent Joint Transmission (CJT) has been introduced. CJT supports joint scheduling of more terminals and multi-user multiple-input multiple-output (MU-MIMO) with more terminals. Compared with NC-JT, CJT has greater system gain.

[0087] Currently, MU-MIMO supports a maximum of 12 DMRS ports, that is, the maximum number of supported DMRS ports is 12. Hereinafter, for convenience of description, the DMRS supporting a maximum of 12 DMRS ports is referred to as a first-type DMRS.

[0088] Therefore, for terminals supporting MTRP in CJT scenarios, in order to support MU-MIMO for more terminals, it is necessary to support more DMRS ports, that is, to enhance the first type of DMRS.

[0089] In one embodiment, the enhanced DMRS and the first type DMRS use different orthogonal cover code (OCC) lengths in the frequency domain. The OCC length used by the second type DMRS in the frequency domain is greater than the OCC length used by the first type DMRS in the frequency domain.

[0090] Among them, in the embodiment of the present disclosure, after the first type of DMRS is enhanced, the DMRS whose OCC length used in the frequency domain is greater than the OCC length used in the frequency domain of the first type of DMRS is called the second type of DMRS.

[0091] In one embodiment, the OCC order used by the second type DMRS in the frequency domain is higher than the OCC order used by the first type DMRS in the frequency domain. For example, the first type DMRS uses a second-order OCC in the frequency domain, and the second type DMRS uses a fourth-order OCC in the frequency domain.

[0092] In one embodiment, the maximum number of DMRS ports supported by the second type DMRS is greater than the maximum number of DMRS ports supported by the first type DMRS. For example, in the embodiment of the present disclosure, the maximum number of DMRS ports supported by the second type DMRS is 24, and the maximum number of DMRS ports supported by the first type DMRS is 12.

[0093] In the embodiment of the present disclosure, when the terminal supports the second type of DMRS, the terminal supports different transmission schemes. For example, it supports the transmission scheme of a single TRP, the transmission scheme of MTRP's CJT, and the transmission scheme of MTRP's NCJT. For the MTRP's CJT scenario, up to 4 TRPs can be supported, and up to 2 TCI states can be indicated. Therefore, for MTRP's CJT, the network device may indicate one TCI state or two TCI states. At this time, there will be a situation where the MTRP's CJT and STRP or the MTRP's CJT and the MTRP's NCJT cannot be distinguished. That is, in the MTRP's CJT scenario, for the enhanced DMRS, the terminal and the network device cannot determine which DMRS port table to use to determine the DMRS port.

[0094] Based on this, an embodiment of the present disclosure provides a DMRS port indication method, which indicates the DMRS port of the first type DMRS or the second type DMRS allocated to the terminal by the network device through indication information, so that the terminal can determine the DMRS port used to transmit data, thereby correctly performing channel estimation and data demodulation.

[0095] FIG2 is a flow chart showing a DMRS port indication method according to an exemplary embodiment. As shown in FIG2 , the DMRS port indication method is used in a communication system and includes the following steps.

[0096] Step S11: The network device sends instruction information to the terminal.

[0097] In some embodiments, the indication information is used to indicate a DMRS port allocated by the network device to the terminal.

[0098] In some embodiments, the DMRS port corresponds to a first type DMRS or a second type DMRS.

[0099] Step S12: The terminal determines a DMRS port based on the indication information.

[0100] In the embodiment of the present disclosure, the terminal determines the DMRS port of the first type DMRS or the second type DMRS allocated to the terminal by the network device by receiving indication information, so that the terminal can determine the DMRS port used to transmit data, thereby correctly performing channel estimation and data demodulation, thereby improving the accuracy of channel estimation.

[0101] In a DMRS port indication method provided in an embodiment of the present disclosure, a network device sends first information to a terminal to indicate whether the DMRS is a first-type DMRS or a second-type DMRS, so that the terminal can determine whether the current DMRS is a first-type DMRS or a second-type DMRS based on the first information.

[0102] Optionally, the first information is carried in a Medium Access Control control element (MAC-CE) or a Radio Resource Control signaling (RRC).

[0103] In one embodiment, the first information is provided with one bit, and different values ​​are used to indicate whether the DMRS is a first-type DMRS or a second-type DMRS. For example, when the value of the first information is 0, the first information indicates that the DMRS is a first-type DMRS; when the value of the first information is 1, the first information indicates that the DMRS is a second-type DMRS.

[0104] The following embodiments of the present disclosure describe how a terminal determines a DMRS port of the second type of DMRS allocated by a network device when the first information indicates that the DMRS is the second type of DMRS.

[0105] In a DMRS port indication method provided by an embodiment of the present disclosure, indication information is used to indicate a DMRS port allocated by a network device to a terminal from different DMRS port tables.

[0106] In some embodiments, the indication information includes second information and third information. Optionally, the second information is carried in RRC signaling, MAC CE, or DCI information. Optionally, the third information is carried in DCI information. Optionally, the third information is carried in the antenna port indication field of the DCI, such as the DMRS port indication field.

[0107] In some embodiments, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0108] In one embodiment, the DMRS port table includes one or more of multiple code points (Value), the number of code division multiplexing (CDM) groups corresponding to DMRS when there is no data transmission, the DMRS ports corresponding to different code points, the number of preamble symbols, and the number of code words.

[0109] In a DMRS port indication method provided by an embodiment of the present disclosure, different DMRS port tables are determined based on a transmission scheme of a terminal.

[0110] In the embodiment of the present disclosure, the DMRS indicated by the first information is the second type DMRS. Since the terminal supports more DMRS ports under the second type DMRS, the DMRS port table corresponding to the first type DMRS is no longer applicable to the second type DMRS. Therefore, the DMRS port table needs to be redesigned for different transmission schemes of the terminal.

[0111] In some embodiments, the transmission scheme of the terminal includes a STRP-based transmission scheme and an MTRP-based transmission scheme.

[0112] In some embodiments, for the second type of DMRS, under each transmission scheme, there are 4 corresponding DMRS port tables, including a DMRS port table when the DMRS type is DMRS type 1 and the maximum length is 1; a DMRS port table when the DMRS type is DMRS type 1 and the maximum length is 2; a DMRS port table when the DMRS type is DMRS type 2 and the maximum length is 1; and a DMRS port table when the DMRS type is DMRS type 2 and the maximum length is 2.

[0113] In some embodiments, different DMRS port tables include different numbers of code points, and the same code point in different DMRS port tables corresponds to different combinations of DMRS port(s).

[0114] As an example, for the second type of DMRS, in the case of the STRP transmission scheme, the DMRS type is DMRS type 1, and the DMRS port table when occupying a single symbol can be shown in Table 2 below.

[0115] Table 2

[0116] It should be noted that Table 2 is an exemplary description and does not show the specific correspondence between each code point and the DMRS port, which is not limited in the embodiments of the present disclosure.

[0117] As another example, for the second type of DMRS, under the MTRP transmission scheme, the DMRS type is DMRS type 2, and the DMRS port table when occupying a single symbol can be shown in Table 3 below.

[0118] Table 3

[0119] It should be noted that Table 3 is an exemplary description, and the specific correspondence between each code point and the DMRS port is not shown in Table 3, and the embodiments of the present disclosure do not limit this.

[0120] In some embodiments, the MTRP-based transmission scheme includes two transmission schemes: MTRP NCJT and MTRP CJT.

[0121] Among them, under the MTRP NCJT transmission scheme, different data layers of the network device are mapped to different TRPs. For example, the network device has two data layers for data transmission, and sends them under two TRPs. Then the data transmitted by the first data layer is sent by the first TRP, and the data transmitted by the second data layer is sent by the second TRP. Under the MTRP CJT transmission scheme, the same data layer of the network device will be mapped to different TRPs. For example, the network device has two data layers for data transmission, and sends them under two TRPs. Then the data transmitted by the first data layer will be mapped to two TRPs and sent by two TRPs, and the data transmitted by the second data layer will be mapped to two TRPs and sent by two TRPs.

[0122] For ease of description in the following embodiments of the present disclosure, the transmission scheme based on STRP is referred to as the first transmission scheme, the transmission scheme based on MTRP NCJT is referred to as the second transmission scheme, and the transmission scheme based on MTRP CJT is referred to as the third transmission scheme.

[0123] In some embodiments, the DMRS port table corresponding to the first transmission scheme can be referred to as the DMRS port table shown in Table 2, and the DMRS port table corresponding to the second transmission scheme can be referred to as the DMRS port table shown in Table 3. The embodiment of the present disclosure will discuss the DMRS port table corresponding to the third transmission scheme in the following manner.

[0124] Method 1: Different transmission schemes correspond to different DMRS port tables.

[0125] In some embodiments, DMRS port tables are designed for the first transmission scheme, the second transmission scheme, and the third transmission scheme, respectively.

[0126] For example, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table. The first DMRS port table may refer to the DMRS port table shown in Table 2, the second DMRS port table may refer to the DMRS port table shown in Table 3, and the third DMRS port table may also refer to the DMRS port table shown in Table 2. However, the first DMRS port table, the second DMRS port table, and the third DMRS port table each correspond to a different number of code points.

[0127] In one implementation, the first DMRS port table, the second DMRS port table, and the third DMRS port table have different numbers of code points, and the numbers of CDM groups and DMRS ports corresponding to different code points are the same or different.

[0128] For example, the number of code points in the first DMRS port table is 48, the number of code points in the second DMRS port table is 49, and the number of code points in the third DMRS port table is 64.

[0129] In some embodiments, the terminal determines a currently used DMRS port table based on the indication information, and determines the currently used DMRS port from the currently used DMRS table through the indication information.

[0130] For example, the first transmission scheme corresponds to the first DMRS port table, the second transmission scheme corresponds to the second DMRS port table, and the third transmission scheme corresponds to the third DMRS port table. The DMRS port table indicated by the indication information is the second DMRS port table, and the indication information indicates the DMRS port corresponding to code point 7 in the second DMRS port table as the DMRS port currently used by the terminal.

[0131] In one implementation, the terminal can implicitly determine the transmission scheme of the terminal based on the indication information.

[0132] For example, the first transmission scheme corresponds to the first DMRS port table, the second transmission scheme corresponds to the second DMRS port table, and the third transmission scheme corresponds to the third DMRS port table. In one example, if the DMRS port table indicated by the indication information is the first DMRS port table, the terminal can implicitly determine, based on the indication information, that the terminal's transmission scheme is the first transmission scheme. If the DMRS port table indicated by the indication information is the second DMRS port table, the terminal can implicitly determine, based on the indication information, that the terminal's transmission scheme is the second transmission scheme. If the DMRS port table indicated by the indication information is the third DMRS port table, the terminal can implicitly determine, based on the indication information, that the terminal's transmission scheme is the third transmission scheme.

[0133] In the embodiment of the present disclosure, the terminal does not need to consider the number of TCI states indicated by the network device. Regardless of whether the number of TCI states indicated by the network device is 1 or 2, the terminal can determine the currently used DMRS port table and DMRS port based on the indication information, and can also implicitly determine the current transmission scheme of the terminal.

[0134] Mode 2: The first transmission scheme and the third transmission scheme correspond to the first DMRS port table, and the second transmission scheme corresponds to the second DMRS port table.

[0135] The first DMRS port table and the second DMRS port table correspond to different numbers of code points, and the numbers of CDM groups and DMRS ports corresponding to different code points are the same or different.

[0136] For example, the first DMRS port table may refer to the DMRS port table shown in Table 2, and the second DMRS port table may refer to the DMRS port table shown in Table 3. However, the first DMRS port table and the second DMRS port table each correspond to a different number of code points.

[0137] In one implementation, the first DMRS port table and the second DMRS port table have different numbers of code points, and the numbers of CDM groups and DMRS ports corresponding to different code points are the same or different.

[0138] In one embodiment, the number of code points in the second DMRS port table is greater than the number of code points in the first DMRS port table. For example, the number of code points in the first DMRS port table is 48, and the number of code points in the second DMRS port table is 49.

[0139] In some embodiments, the first and third transmission schemes share a DMRS port table. In this case, the third transmission scheme can be equivalent to the first transmission scheme, and the terminal does not need to determine whether the current transmission scheme is the first transmission scheme or the third transmission scheme. However, for the third transmission scheme, the network device may indicate one or two TCI states. If the network device indicates two TCI states, it is necessary to introduce new signaling (such as the indication information in the embodiments of the present disclosure) to indicate to the terminal which transmission scheme corresponds to the DMRS port table.

[0140] Exemplarily, the network device indicates a TCI state, and the terminal adopts the first DMRS port table by default, and the terminal determines the DMRS port from the first DMRS port table.

[0141] In another example, the network device indicates two TCI states. In this case, the terminal's transmission scheme may be the second transmission scheme or the third transmission scheme. The terminal cannot determine whether to use the second DMRS port table corresponding to the second transmission scheme or the first DMRS port table corresponding to the third transmission scheme. Therefore, it is necessary to introduce new signaling to instruct the terminal to use the first DMRS port table or the second DMRS port table, that is, the indication information in the embodiment of the present disclosure. The DMRS port is determined by the DMRS port table indicated by the indication information, and the terminal's transmission scheme is implicitly determined by the DMRS port table indicated by the indication information. For example, if the indication information instructs the terminal to determine the DMRS port from the first DMRS port table, it implicitly indicates that the terminal's transmission scheme is the third transmission scheme.

[0142] Mode 3: The first transmission scheme corresponds to the first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to the second DMRS port table.

[0143] The first DMRS port table and the second DMRS port table correspond to different numbers of code points, and the numbers of CDM groups and DMRS ports corresponding to different code points are the same or different.

[0144] For example, the first DMRS port table may refer to the DMRS port table shown in Table 2, and the second DMRS port table may refer to the DMRS port table shown in Table 3. However, the first DMRS port table and the second DMRS port table each correspond to a different number of code points.

[0145] In one implementation, the first DMRS port table and the second DMRS port table have different numbers of code points, and the numbers of CDM groups and DMRS ports corresponding to different code points are the same or different.

[0146] In one embodiment, the number of code points in the second DMRS port table is greater than the number of code points in the first DMRS port table. For example, the number of code points in the first DMRS port table is 48, and the number of code points in the second DMRS port table is 49.

[0147] In some embodiments, the second transmission scheme and the third transmission scheme share a DMRS port table. For the third transmission scheme, the network device may indicate one TCI state or two TCI states. If the network device indicates one TCI state, in order to distinguish the first transmission scheme from the third transmission scheme, it is necessary to introduce new signaling (such as the indication information in the embodiment of the present disclosure) to indicate to the terminal which transmission scheme corresponds to the DMRS port table. If the network device indicates two TCI states, although the second transmission scheme and the third transmission scheme correspond to the same table, the mapping relationship between the TCI state and the DMRS port is different under different transmission schemes. Therefore, in order to distinguish the second transmission scheme from the third transmission scheme, it is necessary to introduce new signaling to indicate the transmission scheme of the terminal.

[0148] For example, a network device indicates a TCI state. At this time, the terminal's transmission scheme may be the first transmission scheme or the third transmission scheme. The terminal cannot determine whether to use the first DMRS port table corresponding to the first transmission scheme or the second DMRS port table corresponding to the third transmission scheme. Therefore, it is necessary to introduce new signaling to instruct the terminal to use the first DMRS port table or the second DMRS port table, that is, the indication information in the embodiment of the present disclosure. The indication information instructs the terminal to determine the DMRS port from a certain DMRS port table. For example, if the indication information instructs the terminal to determine the DMRS port from the first DMRS port table, it implicitly indicates that the terminal's transmission scheme is the first transmission scheme.

[0149] In another example, the network device indicates two TCI states. In this case, the transmission scheme of the terminal may be the second transmission scheme or the third transmission scheme. Although the second transmission scheme and the third transmission scheme correspond to the same DMRS port table, the mapping relationship between the TCI state and the DMRS port is different under different transmission schemes. For example, the DMRS port indicated by the indication information is (0, 1, 2). For NCJT, the first TCI state corresponds to (0, 1) and the second TCI state corresponds to (2). However, for CJT, each DMRS port will be mapped to each TCI state. Therefore, it is still necessary to introduce new signaling to indicate the transmission scheme of the terminal, for example, to determine whether the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme based on the fourth information sent by the network device. Furthermore, the terminal determines the DMRS port table and the specific transmission scheme based on the indication information, and determines the DMRS port according to the DMRS port table and the specific transmission scheme.

[0150] Another example is to determine the DMRS port table based on the fourth information sent by the network device. Regardless of whether the number of TCI states indicated by the network device is 1 or 2, when the fourth information indicates that the transmission scheme of the terminal is the second transmission scheme, the DMRS table is the second DMRS port table.

[0151] The fourth information may be carried in RRC signaling or DCI information, which is not limited in the embodiment of the present disclosure. The fourth information is used to indicate whether the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0152] In some embodiments, the fourth information indicates the transmission scheme of the terminal through different bit values.

[0153] For example, when the bit value of the fourth information is 1, it indicates that the transmission scheme of the terminal is the second transmission scheme; when the bit value of the fourth information is 0, it indicates that the transmission scheme of the terminal is the third transmission scheme.

[0154] In a DMRS port indication method provided by an embodiment of the present disclosure, indication information is used to indicate a DMRS port allocated by a network device to a terminal from a DMRS port table.

[0155] In some embodiments, the indication information includes second information and third information. Optionally, the second information is carried in RRC signaling, MAC CE, or DCI information. Optionally, the third information is carried in DCI information. Optionally, the third information is carried in the antenna port indication field of the DCI, such as the DMRS port indication field.

[0156] In one implementation, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0157] In some embodiments, when the network device indicates the DMRS port through the third information, the third information includes a DMRS port indication field, and the code point indicated by the DMRS port indication field indicates the DMRS port in the DMRS port table indicated by the second information.

[0158] In some embodiments, the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information.

[0159] In one implementation, M bits are added to the DMRS port indication field indicating the first type of DMRS, so that the DMRS port indication field after the M bits are added can indicate all DMRS ports in the DMRS port table.

[0160] The DMRS port indication field of the first type of DMRS is a DMRS port indication field that has been adopted in related technologies, and is not limited in the embodiments of the present disclosure.

[0161] In some embodiments, the number of bits in the DMRS port indication field is determined based on a preset number of bits.

[0162] In one implementation, based on the DMRS port indicator field of the first type DMRS, a preset number of bits is added. Exemplarily, the preset number of bits is 1 bit.

[0163] In one implementation, it is determined whether the DMRS port indication field after adding a preset number of bits can indicate all DMRS ports in the DMRS port table.

[0164] Optionally, if the DMRS port indication field after adding a preset number of bits can indicate all DMRS ports in the DMRS port table, the DMRS port indication field is used to indicate a DMRS port from the DMRS port table.

[0165] Optionally, if the DMRS port indication field after adding the preset number of bits cannot indicate all DMRS ports in the DMRS port table, consider introducing new signaling to indicate the number of available rows in the DMRS port table from the DMRS port table, and the network device indicates the DMRS port in the number of available rows in the DMRS port table through the DMRS port indication field.

[0166] In some embodiments, the number of bits in the DMRS port indication field is determined by the network device configuration.

[0167] In one embodiment, the network device configures the number of bits of the DMRS port indication field for the terminal, for example, by adding X bits. When the DMRS port indication field after adding X bits can indicate all DMRS ports in the DMRS port table, the DMRS port is indicated from the DMRS port table by adding the DMRS port indication field after adding X bits. If the DMRS port indication field after adding X bits cannot indicate all DMRS ports in the DMRS port table, the network device indicates the number of available rows in the DMRS port table from the DMRS port table by introducing new signaling, and the network device indicates the DMRS port in the number of available rows in the DMRS port table through the DMRS port indication field. In some embodiments, the new signaling is the fifth information, and the network device indicates the number of available rows in the DMRS port table from the DMRS port table by sending the fifth information, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port from the number of available rows in the DMRS port table.

[0168] Optionally, the fifth information is carried in downlink control information (DCI) signaling, RRC signaling or MAC-CE signaling, which is not limited in the embodiment of the present disclosure.

[0169] Optionally, the fifth information indicates the starting row number of the available rows. The available rows of the DMRS port table are counted starting from the starting row number indicated by the fifth information, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port in the rows from the starting row number onwards.

[0170] For example, the DMRS port table includes 94 rows, and the network device indicates through the fifth information that the starting row number is 16, then the code point indicated by the DMRS port indication field is used to indicate the DMRS port in the rows from the 16th row onwards in the DMRS port table.

[0171] Optionally, the fifth information indicates the starting row number of the available rows and the ending row number of the available rows, the available rows are the rows between the starting row number and the ending row number indicated by the fifth information, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port between the starting row number and the ending row number in the DMRS port table.

[0172] For example, the DMRS port table includes 94 rows, and the network device indicates through the fifth information that the starting row number is 16 and the ending row number is 64. Then the code point indicated by the DMRS port indication field is used to indicate the DMRS port between the 16th and 64th rows of the DMRS port table.

[0173] Optionally, the fifth information indicates the starting row number of the available rows and the number of rows of the available rows, the available rows are the starting row number indicated by the fifth information plus the number of rows, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port in the rows between the starting row number and the starting row number plus the number of available rows in the DMRS port table.

[0174] For example, the DMRS port table includes 94 rows, and the network device indicates through the fifth information that the starting row number is 16 and the row number is 32. Then the code point indicated by the DMRS port indication field is used to indicate the DMRS port between the 16th and 48th rows of the DMRS port table.

[0175] In the embodiment of the present disclosure, by determining the number of bits of the DMRS port indication field, it is prevented that the number of bits of the DMRS port indication field is too large, which causes excessive signaling consumption.

[0176] FIG3 is a flow chart showing a DMRS port indication method according to an exemplary embodiment. As shown in FIG3 , the DMRS port indication method is used in a terminal and includes the following steps.

[0177] In step S21, instruction information is received.

[0178] The optional implementation of step S21 can refer to the optional implementation of step S11 and step S12 in Figure 2, and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0179] In some embodiments, the indication information is used to indicate a DMRS port allocated by the network device to the terminal.

[0180] In some embodiments, the DMRS port corresponds to a first type DMRS or a second type DMRS;

[0181] In some embodiments, the first type DMRS and the second type DMRS use different OCC lengths in the frequency domain.

[0182] In some embodiments, first information is received, where the first information is used to indicate that the DMRS is a second-type DMRS.

[0183] In some embodiments, the first type of DMRS uses a second-order OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

[0184] In some embodiments, the indication information is used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

[0185] In some embodiments, the indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0186] In some embodiments, the transmission scheme includes a first transmission scheme, a second transmission scheme, or a third transmission scheme.

[0187] Among them, the first transmission scheme is a transmission scheme based on a single TRP; the second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of multiple TRPs; the third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

[0188] In some embodiments, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table.

[0189] In some embodiments, the first transmission scheme and the third transmission scheme correspond to a first DMRS port table, and the second transmission scheme corresponds to a second DMRS port table.

[0190] In some embodiments, the first transmission scheme corresponds to a first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to a second DMRS port table.

[0191] In some embodiments, the indication information includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0192] In some embodiments, the third information includes a DMRS port indication field, and the code point indicated by the DMRS port indication field is used to indicate a DMRS port from the DMRS port table indicated by the second information.

[0193] In some embodiments, the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information.

[0194] In some embodiments, the number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by network device configuration.

[0195] In some embodiments, fifth information is received, the fifth information being used to indicate the number of available rows in the DMRS port table, and the code point indicated by the DMRS port indication field being used to indicate the DMRS port from the number of available rows in the DMRS port table.

[0196] In the embodiment of the present disclosure, the terminal determines the DMRS port of the first type DMRS or the second type DMRS allocated to the terminal by the network device by receiving indication information, so that the terminal can determine the DMRS port used to transmit data, thereby correctly performing channel estimation and data demodulation, thereby improving the accuracy of channel estimation.

[0197] FIG4 is a flow chart showing a DMRS port indication method according to an exemplary embodiment. As shown in FIG4 , the DMRS port indication method is used in a network device and includes the following steps.

[0198] In step S31, instruction information is sent.

[0199] The optional implementation of step S31 can refer to the optional implementation of step S11 and step S12 in FIG2 , and other related parts in the embodiment involved in FIG2 , which will not be described in detail here.

[0200] In some embodiments, the DMRS port corresponds to a first type DMRS or a second type DMRS;

[0201] In some embodiments, the first type DMRS and the second type DMRS use different OCC lengths in the frequency domain.

[0202] In some embodiments, first information is sent, where the first information is used to indicate that the DMRS is a second-type DMRS.

[0203] In some embodiments, the first type of DMRS uses a second-order OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

[0204] In some embodiments, the indication information is used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

[0205] In some embodiments, the indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0206] In some embodiments, the transmission scheme includes a first transmission scheme, a second transmission scheme, or a third transmission scheme.

[0207] Among them, the first transmission scheme is a transmission scheme based on a single TRP; the second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of multiple TRPs; the third transmission scheme is a coherent joint transmission based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

[0208] In some embodiments, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table.

[0209] In some embodiments, the first transmission scheme and the third transmission scheme correspond to a first DMRS port table, and the second transmission scheme corresponds to a second DMRS port table.

[0210] In some embodiments, the first transmission scheme corresponds to a first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to a second DMRS port table.

[0211] In some embodiments, the indication information includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0212] In some embodiments, the third information includes a DMRS port indication field, and the code point indicated by the DMRS port indication field is used to indicate a DMRS port from the DMRS port table indicated by the second information.

[0213] In some embodiments, the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information.

[0214] In some embodiments, the number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by network device configuration.

[0215] In some embodiments, fifth information is sent, the fifth information is used to indicate the number of available rows in the DMRS port table from the DMRS port table, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port from the number of available rows in the DMRS port table.

[0216] In the embodiment of the present disclosure, the network device indicates the DMRS port of the first type DMRS or the second type DMRS allocated to the terminal through indication information, so that the terminal can determine the DMRS port used to transmit data, thereby correctly performing channel estimation and data demodulation, thereby improving the accuracy of channel estimation.

[0217] It should be noted that those skilled in the art will appreciate that the various implementation methods / embodiments involved in the embodiments of the present disclosure can be used in conjunction with the aforementioned embodiments or can be used independently. Whether used alone or in conjunction with the aforementioned embodiments, the implementation principles are similar. In the implementation of the present disclosure, some embodiments are described in terms of implementation methods used together. Of course, those skilled in the art will appreciate that such examples are not limitations on the embodiments of the present disclosure.

[0218] Based on the same concept, an embodiment of the present disclosure also provides a DMRS port indication device.

[0219] It is understandable that the DMRS port indication device provided by the embodiment of the present disclosure includes hardware structures and / or software modules corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of the various examples disclosed in the embodiment of the present disclosure, the embodiment of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present disclosure.

[0220] FIG5 is a block diagram of a DMRS port indication device according to an exemplary embodiment. Referring to FIG5 , the device includes a receiving module 101 .

[0221] The receiving module 101 is used to receive indication information, where the indication information is used to indicate the demodulation reference signal DMRS port allocated by the network device to the terminal; the DMRS port corresponds to the first type DMRS or the second type DMRS; the first type DMRS and the second type DMRS use different orthogonal cover code OCC lengths in the frequency domain.

[0222] In one implementation, the receiving module 101 is further configured to receive first information, where the first information is used to indicate a second type of DMRS, and the DMRS port corresponds to the second type of DMRS.

[0223] In one implementation, the first type of DMRS uses a second-order orthogonal cover code OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

[0224] In one implementation, the indication information is used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

[0225] In one implementation, the indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0226] In one embodiment, the transmission scheme includes a first transmission scheme, a second transmission scheme or a third transmission scheme; wherein the first transmission scheme is a transmission scheme based on a single transmitting and receiving point TRP; the second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of multiple TRPs; the third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

[0227] In one implementation, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table; or

[0228] The first transmission scheme and the third transmission scheme correspond to the first DMRS port table, and the second transmission scheme corresponds to the second DMRS port table; or

[0229] The first transmission scheme corresponds to the first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to the second DMRS port table.

[0230] In one implementation, the indication information further includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0231] In one implementation, the third information includes a DMRS port indication field, and the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information; or

[0232] The number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by the network device configuration.

[0233] In one embodiment, the receiving module 101 is further used to receive fifth information, where the fifth information is used to indicate the number of available rows in the DMRS port table from the DMRS port table, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port from the number of available rows in the DMRS port table.

[0234] FIG6 is a block diagram of a DMRS port indication device according to an exemplary embodiment. Referring to FIG6 , the device includes a sending module 201 .

[0235] The sending module 201 is used to send indication information, where the indication information is used to indicate the demodulation reference signal DMRS port allocated by the network device to the terminal; the DMRS port corresponds to the first type DMRS or the second type DMRS; the first type DMRS and the second type DMRS use different orthogonal cover code OCC lengths in the frequency domain.

[0236] In one implementation, the sending module 201 is further configured to send first information, where the first information is used to indicate a second type of DMRS, and the DMRS port corresponds to the second type of DMRS.

[0237] In one implementation, the first type of DMRS uses a second-order orthogonal cover code OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

[0238] In one implementation, the indication information is used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

[0239] In one implementation, the indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

[0240] In one embodiment, the transmission scheme includes a first transmission scheme, a second transmission scheme or a third transmission scheme; wherein the first transmission scheme is a transmission scheme based on a single transmitting and receiving point TRP; the second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of multiple TRPs; the third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

[0241] In one embodiment, the first transmission scheme corresponds to a first DMRS port table, the second transmission scheme corresponds to a second DMRS port table, and the third transmission scheme corresponds to a third DMRS port table; or

[0242] The first transmission scheme and the third transmission scheme correspond to the first DMRS port table, and the second transmission scheme corresponds to the second DMRS port table; or

[0243] The first transmission scheme corresponds to the third DMRS port table, and the second transmission scheme and the third transmission scheme correspond to the fourth DMRS port table.

[0244] In one implementation, the indication information further includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

[0245] In one embodiment, the third information includes a DMRS port indication field, and the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information; or the number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by the network device configuration.

[0246] In one embodiment, the sending module 201 is further used to send fifth information, where the fifth information is used to indicate the number of available rows in the DMRS port table from the DMRS port table, and the code point indicated by the DMRS port indication field is used to indicate the DMRS port from the number of available rows in the DMRS port table.

[0247] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0248] Figure 7 is a block diagram of a DMRS port indication device according to an exemplary embodiment. For example, the device 300 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0249] 7 , apparatus 300 may include one or more of the following components: a processing component 302 , a memory 304 , a power component 306 , a multimedia component 308 , an audio component 310 , an input / output (I / O) interface 312 , a sensor component 314 , and a communication component 316 .

[0250] The processing component 302 generally controls the overall operation of the device 300, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. The processing component 302 may include one or more processors 320 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 302 may include one or more modules to facilitate interaction between the processing component 302 and other components. For example, the processing component 302 may include a multimedia module to facilitate interaction between the multimedia component 308 and the processing component 302.

[0251] The memory 304 is configured to store various types of data to support operations on the device 300. Examples of such data include instructions for any application or method operating on the device 300, contact data, phone book data, messages, pictures, videos, etc. The memory 304 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0252] The power component 306 provides power to the various components of the device 300. The power component 306 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 300.

[0253] The multimedia component 308 includes a screen that provides an output interface between the device 300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, slides, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 308 includes a front camera and / or a rear camera. When the device 300 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0254] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) that is configured to receive external audio signals when the device 300 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 further includes a speaker for outputting audio signals.

[0255] I / O interface 312 provides an interface between processing component 302 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: a home button, volume buttons, a start button, and a lock button.

[0256] The sensor assembly 314 includes one or more sensors for providing various aspects of the status assessment of the device 300. For example, the sensor assembly 314 can detect the open / closed state of the device 300, the relative positioning of components, such as the display and keypad of the device 300. The sensor assembly 314 can also detect changes in the position of the device 300 or a component of the device 300, the presence or absence of user contact with the device 300, the orientation or acceleration / deceleration of the device 300, and temperature changes of the device 300. The sensor assembly 314 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 314 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 314 may also include an accelerometer, a gyroscope, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0257] The communication component 316 is configured to facilitate wired or wireless communication between the device 300 and other devices. The device 300 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0258] In an exemplary embodiment, the apparatus 300 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described method.

[0259] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 304 including instructions, which can be executed by the processor 320 of the apparatus 300 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0260] FIG8 is a block diagram illustrating a DMRS port indication device according to an exemplary embodiment. For example, device 400 may be provided as a network device. Referring to FIG8 , device 400 includes a processing component 422, which further includes one or more processors, and memory resources represented by memory 432 for storing instructions executable by processing component 422, such as applications. The applications stored in memory 432 may include one or more modules, each corresponding to a set of instructions. Furthermore, processing component 422 is configured to execute instructions to perform the above-described method.

[0261] The device 400 may also include a power supply component 426 configured to perform power management of the device 400, a wired or wireless network interface 450 configured to connect the device 400 to a network, and an input / output (I / O) interface 458. The device 400 may operate based on an operating system stored in the memory 432, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or the like.

[0262] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 432 including instructions, which can be executed by the processing component 422 of the apparatus 400 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0263] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0264] It is further understood that the meaning of words such as "in response to", "if" or "if" involved in this disclosure depends on the context and the actual usage scenario. For example, the word "in response to" used herein can be interpreted as "at..." or "when..." or "if".

[0265] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0266] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0267] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein.

[0268] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A demodulation reference signal port indication method, characterized in that: Executed by a terminal, the method includes: Receiving indication information, where the indication information is used to indicate a demodulation reference signal DMRS port allocated by a network device to a terminal; The DMRS port corresponds to a first type DMRS or a second type DMRS; The orthogonal cover code OCC lengths used by the first type DMRS and the second type DMRS in the frequency domain are different.

2. The method according to claim 1, characterized in that The method further comprises: First information is received, where the first information is used to indicate a second type of DMRS, and the DMRS port corresponds to the second type of DMRS.

3. The method according to claim 2, characterized in that The first type of DMRS uses a second-order orthogonal cover code OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

4. The method according to any one of claims 1 to 3, characterized in that The indication information is further used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

5. The method according to claim 4, characterized in that The indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

6. The method according to claim 4 or 5, characterized in that: The transmission scheme includes a first transmission scheme, a second transmission scheme or a third transmission scheme; The first transmission scheme is a transmission scheme based on a single transmission and reception point TRP; The second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of the multiple TRPs; The third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

7. The method according to any one of claims 4 to 6, characterized in that The first transmission scheme corresponds to the first DMRS port table, the second transmission scheme corresponds to the second DMRS port table, and the third transmission scheme corresponds to the third DMRS port table; or The first transmission scheme and the third transmission scheme correspond to a first DMRS port table, and the second transmission scheme corresponds to a second DMRS port table; or The first transmission scheme corresponds to a first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to a second DMRS port table.

8. The method according to claim 7, characterized in that The second transmission scheme and the third transmission scheme correspond to a second DMRS port table; The indication information further includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

9. The method according to any one of claims 5 to 8, characterized in that The third information includes a DMRS port indication field; The number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information; or The number of bits of the DMRS port indication field is determined based on a preset number of bits; or The number of bits in the DMRS port indication field is determined by the network device configuration.

10. The method according to claim 9, characterized in that The number of bits of the DMRS port indication field is determined based on a preset number of bits; or the number of bits of the DMRS port indication field is determined by a network device configuration; The method further comprises: Fifth information is received, where the fifth information is used to indicate the number of available rows in the DMRS port table from the DMRS port table, and the code point indicated by the DMRS port indication field is used to indicate a DMRS port from the number of available rows in the DMRS port table.

11. A demodulation reference signal port indication method, characterized in that: Executed by a network device, the method includes: Sending indication information, where the indication information is used to indicate a demodulation reference signal DMRS port allocated to the terminal; The DMRS port corresponds to a first type DMRS or a second type DMRS; The orthogonal cover code OCC lengths used by the first type DMRS and the second type DMRS in the frequency domain are different.

12. The method according to claim 11, characterized in that The method further comprises: First information is sent, where the first information is used to indicate a second type of DMRS, and the DMRS port corresponds to the second type of DMRS.

13. The method according to claim 11 or 12, characterized in that: The first type of DMRS uses a second-order orthogonal cover code OCC in the frequency domain, and the second type of DMRS uses a fourth-order OCC in the frequency domain.

14. The method according to any one of claims 11 to 13, characterized in that The indication information is further used to indicate a DMRS port from different DMRS port tables, where the different DMRS port tables are determined based on a transmission scheme of the terminal.

15. The method according to claim 14, characterized in that The indication information includes second information and third information, the second information is used to indicate a DMRS port table, and the third information is used to indicate a DMRS port from the DMRS port table.

16. The method according to claim 14 or 15, characterized in that The transmission scheme includes a first transmission scheme, a second transmission scheme or a third transmission scheme; The first transmission scheme is a transmission scheme based on a single transmission and reception point TRP; The second transmission scheme is a non-coherent joint transmission scheme based on multiple TRPs, and different data layers are mapped to different TRPs under the non-coherent joint transmission scheme of the multiple TRPs; The third transmission scheme is a coherent joint transmission scheme based on multiple TRPs, and the same data layer is mapped to different TRPs under the coherent joint transmission scheme of multiple TRPs.

17. The method according to any one of claims 14 to 16, characterized in that The first transmission scheme corresponds to the first DMRS port table, the second transmission scheme corresponds to the second DMRS port table, and the third transmission scheme corresponds to the third DMRS port table; or The first transmission scheme and the third transmission scheme correspond to a first DMRS port table, and the second transmission scheme corresponds to a second DMRS port table; or The first transmission scheme corresponds to a first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to a second DMRS port table.

18. The method according to claim 17, characterized in that The first transmission scheme corresponds to a first DMRS port table, and the second transmission scheme and the third transmission scheme correspond to a second DMRS port table; The indication information further includes fourth information, and the fourth information is used to indicate that the transmission scheme of the terminal is the second transmission scheme or the third transmission scheme.

19. The method according to any one of claims 15 to 18, characterized in that The third information includes a DMRS port indication field, and the number of bits of the DMRS port indication field is determined based on the DMRS port table indicated by the second information; or The number of bits of the DMRS port indication field is determined based on a preset number of bits; or The number of bits in the DMRS port indication field is determined by the network device configuration.

20. The method according to claim 19, characterized in that The number of bits in the DMRS port indication field is determined based on a preset number of bits; or the number of bits in the DMRS port indication field is determined by the network device configuration. The method further comprises: Fifth information is received, where the fifth information is used to indicate the number of available rows in the DMRS port table from the DMRS port table, and the code point indicated by the DMRS port indication field is used to indicate a DMRS port from the number of available rows in the DMRS port table.

21. A demodulation reference signal port indication device, characterized in that: The device comprises: A receiving module, used to receive indication information, where the indication information is used to indicate a demodulation reference signal DMRS port allocated by the network device to the terminal; The DMRS port corresponds to a first type DMRS or a second type DMRS; The orthogonal cover code OCC lengths used by the first type DMRS and the second type DMRS in the frequency domain are different.

22. A demodulation reference signal port indication device, characterized in that: The device comprises: A sending module, used to send indication information, where the indication information is used to indicate a demodulation reference signal DMRS port allocated to the terminal; The DMRS port corresponds to a first type DMRS or a second type DMRS; The orthogonal cover code OCC lengths used by the first type DMRS and the second type DMRS in the frequency domain are different.

23. A communication device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to: execute the method described in any one of claims 1 to 10 or any one of claims 11 to 20.

24. A storage medium, characterized in that The storage medium stores instructions, and when the instructions in the storage medium are executed by the processor of the terminal, the terminal is enabled to execute the method described in any one of claims 1 to 10; or, when the instructions in the storage medium are executed by the processor of the network device, the network device is enabled to execute the method described in any one of claims 11 to 20.

25. A communication system, comprising a terminal and a network device, wherein: The terminal is used to perform the method according to any one of claims 1 to 10; The network device is used to execute the method according to any one of claims 11-20.

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