Communication method, terminal equipment and network equipment

Abstract

The invention provides a communication method, terminal equipment and network equipment. The method comprises the following steps: the terminal equipment determines PTRS information according to DMRS configuration; the terminal equipment determines transmission parameters of the PTRS according to the PTRS information; wherein the PTRS information comprises one or more of the following information: PTRS power increase value information, an association relationship between a PTRS port and a DMRS port, and an information length indicated by association between the PTRS port and the DMRS port in the DCI; wherein the DMRS configuration comprises the length of the frequency domain OCC. The number of DMRS ports which can be supported by different frequency domain OCC lengths on one OFDM symbol can be different, that is, the number of DMRS ports which can be supported by different DMRS configurations on one OFDM symbol can be different. Based on the method provided by the present application, a communication device can determine reasonable PTRS information according to DMRS configuration, thereby determining PTRS transmission parameters, and further avoiding unnecessary DCI signaling overhead and information redundancy.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and more specifically, to a communication method, a terminal device and a network device. Background Art

[0002] With the development of communication technology, the number of demodulation reference signal (DMRS) ports that can be transmitted on an orthogonal frequency division multiplexing (OFDM) symbol will increase. For example, in Rel-15, the uplink DMRS port can use a frequency domain orthogonal cover code (OCC) with a length of 2 to ensure orthogonality. When the length of the frequency domain OCC is 2, up to 4 or 6 DMRS ports can be transmitted on one OFDM symbol. In Rel-18, the communication system introduced further DMRS enhancement. DMRS enhancement can support frequency domain OCC with a length of 4, so that up to 8 or 12 DMRS ports can be transmitted on one OFDM symbol. In this case, since different OCC lengths can support different numbers of DMRS ports on one OFDM symbol, the corresponding phase tracking reference signal (PTRS) power boost value and the number of DMRS ports associated with the PTRS port candidates are also different. Regarding how to indicate the PTRS information corresponding to different OCC lengths, the relevant technology has not yet provided a suitable solution. Summary of the invention

[0003] The present application provides a communication method, a terminal device and a network device. The following introduces various aspects involved in the present application.

[0004] In a first aspect, a communication method is provided, including: a terminal device determines PTRS information according to a DMRS configuration; the terminal device determines a PTRS transmission parameter according to the PTRS information; wherein the PTRS information includes one or more of the following information: PTRS power boost value information, an association relationship between a PTRS port and a DMRS port, and an information length indicating an association between a PTRS port and a DMRS port in a DCI; wherein the DMRS configuration includes the length of a frequency domain OCC.

[0005] In a second aspect, a communication method is provided, including: a network device determines PTRS information according to a DMRS configuration; the network device determines a transmission parameter of the PTRS according to the PTRS information; wherein the PTRS information includes one or more of the following information: PTRS power boost value information, an association relationship between a PTRS port and a DMRS port, and an information length indicating an association between a PTRS port and a DMRS port in a DCI; wherein the DMRS configuration includes the length of the frequency domain OCC.

[0006] According to a third aspect, a terminal device is provided, comprising: a first determination unit, configured to determine PTRS information according to a DMRS configuration; and a second determination unit, configured to determine a transmission parameter of PTRS according to the PTRS information; wherein the PTRS information comprises one or more of the following information: PTRS power boost value information, an association relationship between a PTRS port and a DMRS port, and an information length indicating an association relationship between a PTRS port and a DMRS port in a DCI; wherein the DMRS configuration comprises the length of the frequency domain OCC.

[0007] In a fourth aspect, a network device is provided, including: a third determination unit, used to determine PTRS information according to the DMRS configuration; a fourth determination unit, used to determine the transmission parameters of the PTRS according to the PTRS information; wherein the PTRS information includes one or more of the following information: PTRS power boost value information, the association relationship between the PTRS port and the DMRS port, and the information length of the PTRS port and DMRS port association indication in the DCI; wherein the DMRS configuration includes the length of the frequency domain OCC.

[0008] In a fifth aspect, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the terminal device executes part or all of the steps in the method of the first aspect.

[0009] In a sixth aspect, a network device is provided, comprising a processor and a memory, wherein the memory is used to store one or more computer programs, and the processor is used to call the computer program in the memory so that the network device executes part or all of the steps in the method of the second aspect.

[0010] In a seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned terminal device and / or network device. In another possible design, the system may also include other devices that interact with the terminal device or network device in the solution provided by the embodiment of the present application.

[0011] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program enables a terminal device and / or a network device to execute part or all of the steps in the methods of the above aspects.

[0012] In a ninth aspect, an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a terminal device and / or a network device to perform some or all of the steps in the above-mentioned various aspects of the method. In some implementations, the computer program product can be a software installation package.

[0013] In the tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above aspects.

[0014] Different frequency domain OCC lengths can support different numbers of DMRS ports on an OFDM symbol, that is, different DMRS configurations can support different numbers of DMRS ports on an OFDM symbol. Based on the method provided by the present application, the communication device can determine reasonable PTRS information according to the DMRS configuration, thereby determining the PTRS transmission parameters, thereby avoiding unnecessary DCI signaling overhead and information redundancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a wireless communication system applied in an embodiment of the present application.

[0016] Figure 2A and Figure 2B They are example diagrams of DMRS respectively.

[0017] Figure 3 It is a schematic flow chart of a communication method provided in an embodiment of the present application.

[0018] Figure 4 It is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

[0019] Figure 5 It is a schematic structural diagram of a network device provided in an embodiment of the present application.

[0020] Figure 6 It is a schematic structural diagram of a device for communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0022] Figure 1 The wireless communication system 100 used in the embodiment of the present application. The wireless communication system 100 may include a communication device. The communication device may include, for example, a network device 110 and / or a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120. The network device 110 may provide communication coverage for a specific geographical area, and may communicate with the terminal device 120 located in the coverage area.

[0023] Figure 1 One network device and two terminal devices are shown exemplarily. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.

[0024] Optionally, the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0025] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc. The technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system, satellite communication system, and so on.

[0026] The terminal device in the embodiment of the present application may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a device that provides voice and / or data connectivity to a user, and may be used to connect people, objects and machines, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. The terminal device in the embodiment of the present application can be a mobile phone, a tablet computer, a laptop, a PDA, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in vehicle-to-everything (V2X) or device to device (D2D). For example, a cellular phone and a car communicate with each other using a sidelink signal. Cellular phones and smart home devices communicate without relaying communication signals through a base station.

[0027] The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, such as a base station. The network device in the embodiment of the present application may refer to a wireless access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or be replaced with the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmission point (TRP), transmission point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station may also refer to a communication module, modem or chip used to be set in the aforementioned equipment or device. The base station may also be a mobile switching center and a device that performs the base station function in D2D, V2X, machine-to-machine (M2M) communication, a network side device in a 6G network, and a device that performs the base station function in a future communication system. The base station may support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.

[0028] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0029] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an AAU.

[0030] The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the scenarios in which the network equipment and terminal equipment are located.

[0031] It should be understood that all or part of the functions of the communication device in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (eg, a cloud platform).

[0032] In some communication systems (such as NR systems), DMRS can be divided into pre-DMRS and post-DMRS. Pre-DMRS is usually located in the first few OFDM symbols of the time slot. Post-DMRS is a repetition of pre-DMRS and is used to ensure performance in high-speed scenarios. Pre-DMRS can contain 1 or 2 OFDM symbols and is configured by the network device.

[0033] Some communication systems (such as NR systems) support two different DMRS types: type 1 and type 2. Different types of DMRS occupy resources in different ways. Figure 2A and Figure 2B Examples are given for DMRS types 1 and 2 respectively.

[0034] Figure 2A This is an example diagram of type 1 DMRS. Figure 2AAs shown, two code division multiplexing (CDM) groups can be supported on one OFDM symbol in each physical resource block (PRB). Each CDM group can contain six subcarriers. Each CDM group can support two ports. The two ports can be kept orthogonal through OCC. For example, the OCC code used by one port on a different carrier may be [+1+1+1+1+1+1], and the OCC code used by the other port may be [+1 -1+1 -1+1 -1]. In this way, type 1 DMRS can support up to four orthogonal ports on one OFDM symbol; and up to eight orthogonal ports on two OFDM symbols (time domain orthogonal cover code (TD-OCC) can be used between two OFDM symbols). Specifically, the first CDM group of the first DMRS symbol may include ports {1000, 1001}, and the second CDM group may include ports {1002, 1003}; the first CDM group of the second DMRS symbol may include ports {1004, 1005}, and the second CDM group may include ports {1006, 1007}.

[0035] Figure 2B This is an example diagram of type 2 DMRS. Figure 2B As shown, three CDM groups can be supported on one OFDM symbol of each PRB, and each CDM group can contain four adjacent subcarriers. Each CDM group can support two ports, and the two ports can be kept orthogonal through OCC. For example, the OCC code used by one port on a different carrier may be [+1+1+1+1], and the OCC code used by the other port may be [+1 -1+1 -1]. In this way, type 2 DMRS can support up to 6 orthogonal ports on one OFDM symbol; up to 12 orthogonal ports can be supported on two OFDM symbols (TD-OCC can be used between two OFDM symbols). Specifically, the first CDM group of the first DMRS symbol may include ports {1000, 1001}, the second CDM group may include ports {1002, 1003}, and the third CDM group may include ports {1004, 1005}; the first CDM group of the second DMRS symbol may include ports {1006, 1007}, the second CDM group may include ports {1008, 1009}, and the third CDM group may include ports {1010, 1011}.

[0036] In some embodiments, the terminal device can support uplink transmission of up to 4 antenna ports. In order to support uplink transmission in frequency range 2 (FR2), the terminal device can be configured with 1-2 PTRS ports. Each PTRS port can be associated with a different transport layer / DMRS. PTRS can be used for phase tracking and adjustment of the associated transport layer / DMRS, thereby ensuring the performance of DMRS channel estimation and data demodulation.

[0037] For a fully coherent codebook, all transport layer / DMRS ports can be associated with the same PTRS port. In this case, the network device will only configure one PTRS port. The PTRS port and the associated DMRS port use the same sequence, frequency domain resources, and precoding matrix. The DMRS port associated with the PTRS port can be used to determine the transmission mode of the PTRS.

[0038] For the case of configuring partially coherent and non-coherent codebooks, the number of PTRS ports actually transmitted is determined by the transmit precoding matrix indicator (TPMI) and the number of transmission layers. Among them, the physical uplink shared channel (PUSCH) antenna ports 1000 and 1002 and the DMRS (transport layer) transmitted on these two ports are associated with PTRS port 0 (that is, the phase estimation result on the PTRS port can be used for the PUSCH and DMRS transmitted on these two antenna ports), and the PUSCH antenna ports 1001 and 1003 and the DMRS (transport layer) transmitted on these two ports are associated with PTRS port 1.

[0039] If there are multiple DMRS ports transmitted on the antenna port, which DMRS port is actually associated with the corresponding PTRS port needs to be determined according to the DMRS port and PTRS port association indication in the DCI.

[0040] In combination with Table 1 and Table 2, the DMRS in the Rel-15 protocol is used as an example to illustrate the association indication of the DMRS port and the PTRS port. When the number of PTRS ports is 1, a 2-bit DCI signaling is used to indicate which DMRS port is associated with the PTRS port, that is, the DMRS port and the PTRS port association indication is 2 bits. Table 1 is the DMRS association indication when a single PTRS port is configured. As shown in Table 1, 2 bits can be used to indicate values ​​0-3, and the DMRS ports corresponding to 0-3 are shown in Table 1. When the number of PTRS ports is 2, a 2-bit DCI signaling is used to indicate the DMRS port associated with each PTRS port, that is, the DMRS port and the PTRS port association indication is 2 bits. Table 2 is the DMRS association indication when 2 PTRS ports are configured. As shown in Table 2, the 2 bits of the DMRS port and PTRS port association indication include 1 bit of the most significant bit (most significant bit, MSB) and 1 bit of the least significant bit (least significant bit, LSB). The DMRS ports corresponding to the MSB value and the LSB value are shown in Table 2.

[0041] Table 1

[0042]

[0043] Table 2

[0044]

[0045]

[0046] Since a PTRS port can be associated with multiple transmission layers, in order to ensure that the power on different OFDM symbols is consistent, the power of PTRS needs to be adjusted according to the number of configured transmission layers. Taking Rel-15 DMRS as an example, according to the number of PUSCH transmission layers (n l P ay U e S r CH), the coherent configuration of the codebook, and the transmission scheme (codebook-based or non-codebook transmission), the power boost of PTRS relative to the associated DMRS port can be obtained from Table 3. Which specific power boost scheme to adopt can be configured by the network device. It should be noted that the PTRS power boost value is the boost value (in dB) of the transmit power of a PTRS port relative to the DMRS port or transmission layer associated with the PTRS port. Among them, Qp is the number of PTRS ports currently configured, and the value of Qp can be 1 or 2. The coherent configuration of the codebook and the transmission scheme configuration can be obtained from high-level signaling. The coherent configuration of the codebook can be: a fully coherent codebook, a partially coherent codebook, or a non-coherent codebook. The transmission scheme configuration can be codebook based or non-codebook based.

[0047] Table 3

[0048]

[0049] With the development of communication technology, the number of DMRS ports that can be transmitted on one OFDM symbol will increase. For example, in Rel-15, the uplink DMRS port can use a frequency domain OCC with a length of 2 to ensure orthogonality. When the length of the frequency domain OCC is 2, a maximum of 4 (DMRS of type 1) or 6 (DMRS of type 2) DMRS ports can be transmitted on one OFDM symbol. In Rel-18, the communication system introduces further DMRS enhancement. DMRS enhancement can support a frequency domain OCC with a length of 4, so that a maximum of 8 (DMRS of type 1) or 12 (DMRS of type 2) DMRS ports can be transmitted on one OFDM symbol. In this case, since different OCC lengths can support different numbers of DMRS ports on one OFDM symbol, the corresponding PTRS power boost value and the number of DMRS ports associated with the PTRS port candidate are also different. If the information of the PTRS power boost value or the association relationship between the PTRS port and the DMRS port is designed according to the maximum number of DMRS ports, some information will be redundant in some cases. In addition, if the length of the PTRS-DMRS port association indication information is determined according to the maximum number of uplink DMRS ports, unnecessary DCI signaling overhead will be caused.

[0050] Taking the maximum number of uplink DMRS ports as 8 as an example, if the PTRS power boost value table and / or the table of PTRS port association with DMRS port is designed according to the number of DMRS ports being 8, when the actual number of uplink DMRS ports is 4, the corresponding information indicating the number of DMRS ports being 5-8 in the above two tables is redundant. In addition, if the table of PTRS port association with DMRS port is designed according to the number of DMRS ports being 8, the number of bits indicating the association between PTRS port and DMRS port in DCI needs to support the case where the number of DMRS ports is 8. Therefore, when the actual number of uplink DMRS ports is 4, some bits of the PTRS port association indication in DCI may not be used, resulting in unnecessary DCI signaling overhead.

[0051] In view of the above problems, the present application provides a communication method.

[0052] Figure 3 A schematic flowchart of a communication method provided in an embodiment of the present application. Figure 3 The method shown can be executed by a terminal device and a network device. Figure 3 The method shown may include steps S310 to S340.

[0053] Step S310: The terminal device determines PTRS information according to the DMRS configuration.

[0054] Step S320: The network device determines PTRS information according to the DMRS configuration.

[0055] The DMRS configuration may include the length of the frequency domain OCC. The length of the frequency domain OCC may be, for example, 2 or 4. It is understood that the communication device may determine the PTRS information according to whether the length of the frequency domain OCC is 2 or 4.

[0056] In some embodiments, the length of the frequency domain OCC may be configured through high-level signaling. For example, whether the length of the frequency domain OCC is 2 or 4 may be configured by the network device to the terminal device through high-level signaling. In some embodiments, the length of the frequency domain OCC may be indicated by DCI.

[0057] In some embodiments, the length of the frequency domain OCC may also be described by DMRS. For example, the length of the frequency domain OCC may be described as Rel-15 DMRS or Rel-18 enhanced DMRS. Rel-15 DMRS may correspond to a frequency domain OCC length of 2. Rel-18 enhanced DMRS may correspond to a frequency domain OCC length of 4.

[0058] In some embodiments, the DMRS configuration may further include a DMRS type. The DMRS type may be, for example, type 1 or type 2. The DMRS type may be configured through high-layer signaling.

[0059] The PTRS information may include one or more of the following information: PTRS power boost value information, association relationship between PTRS port and DMRS port, and information length of the PTRS port and DMRS port association indication in DCI. These information are described below.

[0060] The PTRS power boost value information may be used to indicate the situation of the PTRS power boost value. For example, the PTRS power boost value information may include the correspondence between the number of transmission layers and the PTRS power boost value. Alternatively, the PTRS power boost value information may include the correspondence between the coherent configuration of the codebook and the PTRS power boost value. Alternatively, the PTRS power boost value information may include the correspondence between the power boost configuration and the PTRS power boost value.

[0061] As an implementation, the PTRS power boost value may only indicate the PTRS power boost value corresponding to the number of transmission layers that is less than the maximum number of transmission layers. Taking the maximum number of transmission layers as 8 as an example, the PTRS power boost value information may only indicate the PTRS power boost value when the transmission layers are 1-4, or the PTRS power boost value information may only indicate the PTRS power boost value when the transmission layers are 1-6. As an implementation, the PTRS power boost value may indicate the PTRS power boost value corresponding to all possible numbers of transmission layers. Continuing with the example of the maximum number of transmission layers being 8, the PTRS power boost value information may indicate the PTRS power boost value when the transmission layers are 1-8. Based on the above implementation, the communication device may determine which of the following situations the PTRS power boost value information is according to the DMRS configuration: only used to indicate the PTRS power boost value when the transmission layers are 1-4; only used to indicate the PTRS power boost value when the transmission layers are 1-6; used to indicate the PTRS power boost value when the transmission layers are 1-8.

[0062] It should be noted that the present application does not limit the specific value of the maximum number of transmission layers. The above example is given as the maximum number of transmission layers being 8. In some embodiments, the maximum number of transmission layers may also be 6, 12, or the like.

[0063] It should be noted that the present application does not limit the representation method of the PTRS power boost value information. In some embodiments, the PTRS power boost value information can be represented by a table. For example, the PTRS power boost value information can be a PTRS power boost value table.

[0064] For ease of description, the PTRS port and DMRS port association relationship is described as a PTRS-DMRS port association relationship below. The PTRS-DMRS port association relationship can be used to indicate the association between the PTRS port and the DMRS port. For example, the PTRS-DMRS port association relationship may include a corresponding relationship between the PTRS port and DMRS port association indication in the DCI and one or more DMRS ports associated with the PTRS port candidate. Alternatively, the PTRS-DMRS port association relationship may be used to indicate a DMRS port from one or more DMRS ports associated with the PTRS port candidate. Alternatively, the PTRS-DMRS port association relationship may indicate one or more DMRS ports associated with the PTRS port candidate.

[0065] It should be noted that, in some embodiments, "candidate association" may also be referred to as "possible association", that is, the PTRS-DMRS port association relationship may include a list of all DMRS ports that the PTRS port may be associated with, and the DMRS port actually associated with the PTRS port may be one of the listed cases.

[0066] The DMRS port actually associated with the PTRS port can be indicated by the PTRS port and DMRS port association indication in the corresponding PTRS-DMRS port association relationship. For ease of description, the PTRS port and DMRS port association indication is described as a PTRS-DMRS port association indication below.

[0067] In some implementations, the PTRS-DMRS port association relationship may include a correspondence between a PTRS-DMRS port association indication and one or more DMRS ports associated with a PTRS port candidate. For example, the PTRS-DMRS port association relationship may include a correspondence between a PTRS-DMRS port association indication and two DMRS ports associated with a PTRS port candidate. Alternatively, the PTRS-DMRS port association relationship may include a correspondence between a PTRS-DMRS port association indication and three DMRS ports associated with a PTRS port candidate. Alternatively, the PTRS-DMRS port association relationship may include a correspondence between a PTRS-DMRS port association indication and four DMRS ports associated with a PTRS port candidate. Alternatively, the PTRS-DMRS port association relationship may include a correspondence between a PTRS-DMRS port association indication and six DMRS ports associated with a PTRS port candidate. Alternatively, the PTRS-DMRS port association relationship may include a correspondence between a PTRS-DMRS port association indication and eight DMRS ports associated with a PTRS port candidate. Based on the above implementation, according to the DMRS configuration, step S310 or step S320 may include: the communication device may determine that the PTRS-DMRS port association relationship includes the correspondence between the PTRS-DMRS port association indication and several DMRS ports associated with the PTRS port candidate.

[0068] It should be noted that the present application does not limit the representation method of the PTRS-DMRS port association relationship. In some embodiments, the PTRS-DMRS port association relationship can be represented by a table. For example, the PTRS-DMRS port association relationship can be a PTRS-DMRS port association table.

[0069] In some embodiments, the network device may determine the PTRS-DMRS port association indication in the DCI based on the PTRS information and send the DCI. The terminal device may receive the DCI, parse the PTRS-DMRS port association indication in the DCI based on the information length of the PTRS-DMRS port association indication, and then determine the DMRS port associated with the PTRS port based on the PTRS-DMRS port association relationship.

[0070] In some implementations, the information length of the PTRS-DMRS port association indication may be, for example, 2 bits or 3 bits. Based on this implementation, the communication device may determine whether the information length of the PTRS-DMRS port association indication is 2 bits or 3 bits according to the DMRS configuration.

[0071] In some embodiments, the PTRS-DMRS port association indication bit may include a least significant bit (LSB) and a most significant bit (MSB). The LSB may represent a low bit in the PTRS-DMRS port association indication bit, and the MSB may represent a high bit in the PTRS-DMRS port association indication bit.

[0072] Step S330: The terminal device determines the PTRS transmission parameters according to the PTRS information.

[0073] Step S340: The network device determines PTRS transmission parameters according to the PTRS information.

[0074] The PTRS transmission parameters may be parameters related to PTRS transmission. For example, the PTRS transmission parameters may include one or more of the following: PTRS transmission power, power difference between PTRS and DMRS, DMRS port associated with PTRS port, PTRS sequence, and PTRS precoding method.

[0075] As described above, different frequency domain OCC lengths can support different numbers of DMRS ports on an OFDM symbol, that is, different DMRS configurations can support different numbers of DMRS ports on an OFDM symbol. Based on the method provided by the present application, the communication device can determine reasonable PTRS information according to the DMRS configuration, thereby determining the PTRS transmission parameters, thereby avoiding unnecessary DCI signaling overhead and information redundancy.

[0076] It should be noted that the PTRS information can also be determined based on other information besides the DMRS configuration, and the present application does not limit this. In some embodiments, the PTRS information can also be determined based on the number of antenna groups K. Among them, K can be the number of antenna groups currently configured, or K can be the number of antenna groups reported by the terminal device. K can be a positive integer. In some embodiments, the PTRS information can also be determined based on the number of PTRS ports. For example, the network device can pre-configure the number of PTRS ports according to the current codebook subset configuration, or according to the number of PTRS ports currently required. In some embodiments, the PTRS information can also be configured based on the codebook subset.

[0077] In some embodiments, Figure 3 Step S350 may also be included.

[0078] Step S350: The terminal device sends a PTRS. Correspondingly, the network device can receive the PTRS.

[0079] In some implementations, the terminal device may determine one or more of a sequence, a comment resource, and a precoding matrix of a PTRS according to a DMRS port associated with the PTRS port, and send the PTRS.

[0080] In combination with the embodiments below, it is respectively described how to determine the PTRS power boost value information, the PTRS-DMRS port association relationship, and the information length of the PTRS-DMRS port association indication in the DCI based on the DMRS configuration. It is understandable that the embodiments provided in this application can be implemented separately or in combination.

[0081] First, how to determine the PTRS power boost value information based on the DMRS configuration is described.

[0082] In some embodiments, if the length of the frequency domain OCC is 2, the PTRS power boost value information may only indicate the PTRS power boost value when the number of transmission layers is 1-4, or the PTRS power boost value information may only indicate the PTRS power boost value when the number of transmission layers is 1-6.

[0083] In some embodiments, the PTRS power boost value information may be further determined based on the DMRS type. For example, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the PTRS power boost value information may only indicate the PTRS power boost value when the number of transmission layers is 1-4; if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the PTRS power boost value information may only indicate the PTRS power boost value when the number of transmission layers is 1-6.

[0084] Taking the PTRS power boost value information as a PTRS power boost value table as an example, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the PTRS power boost value table can be shown in Table 4. If the length of the frequency domain OCC is 2 and the DMRS type is type 2, the PTRS power boost value table can be shown in Table 5. M in Tables 4 and 5 represents the number of PTRS ports currently configured. M can be 1 or 2.

[0085] Table 4

[0086]

[0087] Table 5

[0088]

[0089] In some embodiments, regardless of whether the DMRS type is type 1 or type 2, when the length of the frequency domain OCC is 2, the same PTRS power boost value information is used. For example, when the length of the frequency domain OCC is 2, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6. In this case, if the DMRS type is type 1, only the PTRS power boost value corresponding to the number of transmission layers 1-4 in the PTRS power boost value information can be used. Continuing with the PTRS power boost table representation as an example, when the length of the frequency domain OCC is 2, the PTRS power boost value table can be determined as Table 5.

[0090] In some embodiments, the PTRS power boost value information may also be determined based on the number of antenna groups K. In other words, when the value of K is different, the adopted PTRS power boost value may also be different. Tables 4 and 5 are examples when K=2. Considering the space limitation, when the frequency domain OCC length is 2, the case where K is other values ​​is not described in detail in this application.

[0091] In some embodiments, if the length of the frequency domain OCC is 4, the PTRS power boost value information may indicate the PTRS power boost value when the number of transmission layers is 1-8.

[0092] In some implementations, when the value of the number of antenna groups K is different, the PTRS power boost value information may also be different. Taking the PTRS power boost value information as a PTRS power boost value table as an example, if the length of the frequency domain OCC is 4, the PTRS power boost value table can be as shown in Table 6 or Table 7. Table 6 provides an example of K=2, and Table 7 provides an example of K=4. M in Tables 6 and 7 represents the number of PTRS ports currently configured. M can be 1 or 2. Due to space limitations, Table 6 is represented by Table 6A and Table 6B, and Table 7 is represented by Table 7A and Table 7B. In other words, Table 6A and Table 6B need to be used in combination, and Table 7A and Table 7B need to be used in combination. Alternatively, Table 6A and Table 6B need to be combined into one table for use, and Table 7A and Table 7B need to be combined into one table for use.

[0093] Table 6A

[0094]

[0095] Table 6B

[0096]

[0097] Table 7A

[0098]

[0099] Table 7B

[0100]

[0101] It should be noted that due to different calculation methods, the values ​​in Tables 4 to 7 can be adjusted. For example, 7.78 can also be expressed as 7.77, and 1.77 can also be expressed as 1.76 or 1.78. In addition, the above Tables 4 to 7 only provide a general expression of the power boost value information, and other expressions can actually be used. The power boost values ​​corresponding to different transmission layers obtained by other expressions can be the same as the values ​​obtained in Tables 4 to 7.

[0102] Based on the above method, the communication device can support determining the power boost value of the PTRS port when transmitting on the uplink 8 antenna ports, thereby ensuring that the power on different OFDM symbols is constant under different DMRS configurations (meeting the requirements of terminal hardware implementation), and enhancing the measurement performance on the PTRS port through power boost.

[0103] It should be noted that the power boost configuration in the PTRS power boost value information can be indicated by the network device through high-level signaling. For example, when the frequency domain OCC length is 2 and the DMRS type is type 1, the terminal device can determine the PTRS power boost information as shown in Table 4. Further, based on the power boost configuration indicated by the high-level signaling and Table 4, the terminal device can determine the corresponding PTRS power boost value.

[0104] In some implementations, the terminal device may determine the power boost value of the PTRS port based on the PTRS power boost value information and the current number of transmission layers. Further, the terminal device may determine the power boost value from the PTRS power boost value information based on the power boost configuration indicated by the network device through high-layer signaling and the current number of transmission layers.

[0105] In some embodiments, the terminal device may determine the transmit power of the PTRS according to the power boost value of the PTRS port. For example, the terminal device may determine the transmit power of the PTRS or the power difference between the PTRS and the DMRS according to the power boost value and the transmit power of the DMRS. In some embodiments, based on the transmit power of the PTRS or the power difference between the PTRS and the DMRS, the terminal device may perform downlink phase tracking and channel estimation.

[0106] In some implementations, the network device may determine the power boost value of the PTRS port according to the PTRS power boost value information and the current number of transmission layers.

[0107] In some embodiments, the network device may perform phase tracking based on the detected PTRS and DMRS according to the power boost value of the PTRS port. For example, the network device may adjust the power or amplitude of the channel information detected from the PTRS port according to the power boost value, and perform phase tracking in combination with the channel information detected from the DMRS port. Taking the power boost value of 3dB as an example, the network device may reduce the power of the channel information detected from the PTRS port by 3dB for phase tracking.

[0108] The following is an example of how to determine the information length of the PTRS-DMRS port association relationship and / or the PTRS-DMRS port association indication in the DCI based on the DMRS configuration. It should be noted that the communication device can simultaneously determine the PTRS-DMRS port association relationship and the information length of the PTRS-DMRS port association indication in the DCI, or can determine only one of the two.

[0109] When the terminal device determines the information length of the PTRS-DMRS port association indication in the DCI, the size of the DCI can be determined according to the maximum information length among the information lengths corresponding to the different frequency domain OCC lengths, so as to detect the DCI. For example, if the OCC length is 2, the corresponding information length is 2 bits, and the OCC length is 4, the corresponding information length is 4 bits, then before the terminal detects the DCI, it is necessary to assume the information length according to 4 bits, so as to determine the total length of the DCI, so as to accurately detect the DCI.

[0110] The following describes the cases where the number of PTRS ports is 1 and the number of PTRS ports is 2.

[0111] The number of PTRS ports is 1

[0112] In some implementations, if the number of PTRS ports configured by the network device is 1, for example, when the current codebook subset is configured as a fully coherent codebook, the information length of the PTRS-DMRS port association indication and the corresponding PTRS-DMRS port association relationship can be determined according to the following method.

[0113] When the length of the frequency domain OCC is 2, the information length of the PTRS-DMRS port association indication can be 2 bits, and the PTRS-DMRS port association relationship can include the correspondence between the PTRS port in the DCI and the DMRS port association indication and the four DMRS ports associated with the PTRS port candidate; or, the information length of the PTRS-DMRS port association indication is 3 bits, and the PTRS-DMRS port association relationship can include the correspondence between the PTRS port in the DCI and the DMRS port association indication and the six DMRS ports associated with the PTRS port candidate.

[0114] In one embodiment, the communication device may further determine the information length and the corresponding PTRS-DMRS port association relationship according to the DMRS type. For example, when the DMRS type is type 1, the information length of the PTRS-DMRS port association indication may be 2 bits, and the PTRS-DMRS port association relationship may include the correspondence between the PTRS port and the DMRS port association indication and the 4 DMRS ports associated with the PTRS port candidate. In this case, the PTRS-DMRS port association relationship may be, for example, as shown in Table 8. When the DMRS type is type 2, the information length of the PTRS-DMRS port association indication may be 3 bits, and the PTRS-DMRS port association relationship may include the correspondence between the PTRS-DMRS port association indication and the 6 DMRS ports associated with the PTRS port candidate. In this case, the PTRS-DMRS port association relationship may be, for example, as shown in Table 9.

[0115] In another embodiment, regardless of whether the DMRS type is type 1 or type 2, as long as the length of the frequency domain OCC is 2, the same PTRS-DMRS port association relationship can be used. For example, when the length of the frequency domain OCC is 2, the PTRS-DMRS port association relationship may include a correspondence between the PTRS-DMRS port association indication in the DCI and the 6 DMRS ports associated with the PTRS port candidate. In this case, the PTRS-DMRS port association relationship may be as shown in Table 9. It should be noted that if the DMRS type is type 1, only the first 4 DMRS ports in the PTRS-DMRS port association relationship (e.g., the first four rows in Table 9) may be used.

[0116] Table 8

[0117]

[0118] Table 9

[0119]

[0120] If the length of the frequency domain OCC is 4, the information length of the PTRS-DMRS port association indication can be 3 bits, and the PTRS-DMRS port association relationship can include the corresponding relationship between the PTRS-DMRS port association indication and the 8 DMRS ports associated with the PTRS port candidate. In this case, the PTRS-DMRS port association relationship can be as shown in Table 10.

[0121] Table 10

[0122]

[0123] If the length of the frequency domain OCC is 4, the information length of the PTRS-DMRS port association indication can be 2 bits, and the PTRS-DMRS port association relationship can include the correspondence between the PTRS-DMRS port association indication and the 4 DMRS ports associated with the PTRS port candidate. Among them, the 4 DMRS ports can correspond to the same codeword. For example, if the current number of codewords is 2, the 4 DMRS ports can correspond to the codeword with a higher modulation and coding scheme (MCS). In this case, the PTRS-DMRS port association relationship can be as shown in Table 11. If the MCS of the two codewords is the same, the 4 DMRS ports can correspond to the first codeword.

[0124] Table 11

[0125]

[0126] When the length of the frequency domain OCC is 4, the number of DMRS ports associated with the PTRS candidate can be determined according to high-level signaling. In other words, the PTRS-DMRS port association relationship includes the correspondence between the PTRS-DMRS port association indication and the 8 or 4 DMRS ports associated with the PTRS port candidate, which can be determined according to high-level signaling; and / or, whether the information length of the PTRS-DMRS port indication is 2 bits or 3 bits is determined based on high-level signaling.

[0127] In some embodiments, the above-mentioned high-layer signaling may be PTRS and DMRS association relationship indication information (hereinafter referred to as PTRS-DMRS association relationship indication information) or indication information for enabling uplink layer 8 transmission. For example, 1 bit of PTRS-DMRS association relationship indication information may be used to indicate whether to use Table 10 or Table 11. For another example, if uplink layer 8 transmission is enabled, Table 10 is used, otherwise Table 8 or Table 9 is used.

[0128] The number of PTRS ports is 2

[0129] If the number of PTRS ports configured by the network device is 2, for example, when the current codebook subset is configured as a partially coherent or incoherent codebook, the information length of the PTRS-DMRS port association indication and the corresponding PTRS-DMRS port association relationship can be determined according to the following method.

[0130] In some embodiments, when the length of the frequency domain OCC is 2, the information length of the PTRS-DMRS port association indication may be 2 bits, and the PTRS-DMRS port association relationship may include a correspondence between the PTRS-DMRS port association indication and the two DMRS ports associated with each PTRS port candidate. In this case, the PTRS-DMRS port association relationship may be as shown in Table 12.

[0131] In the table described in the present application, LSB may represent the lower bit in the PTRS-DMRS port association indication bit; MSB may represent the upper bit in the PTRS-DMRS port association indication bit.

[0132] Table 12

[0133]

[0134] In some embodiments, when the length of the frequency domain OCC is 2, the information length of the PTRS-DMRS port association indication may be 4 bits, and the PTRS-DMRS port association relationship may include a correspondence between the PTRS-DMRS port association indication and the three DMRS ports associated with each PTRS port candidate. In this case, the PTRS-DMRS port association relationship may be as shown in Table 13.

[0135] Table 13

[0136]

[0137] In one embodiment, when the length of the frequency domain OCC is 2, the communication device may further determine the information length and the corresponding PTRS-DMRS port association relationship according to the DMRS type. For example, when the DMRS type is type 1, the information length of the PTRS-DMRS port association indication may be 2 bits, and the PTRS-DMRS port association relationship may include the correspondence between the PTRS-DMRS port association indication and the 2 DMRS ports associated with each PTRS port candidate. In this case, the PTRS-DMRS port association relationship may be as shown in Table 12. At this time, the 2-bit information may be used to indicate the DMRS ports associated with different PTRS ports. When the DMRS type is type 2, the information length of the PTRS-DMRS port association indication may be 4 bits, and the PTRS-DMRS port association relationship may include the correspondence between the PTRS-DMRS port association indication and the 3 DMRS ports associated with each PTRS port candidate. In this case, the PTRS-DMRS port association relationship may be as shown in Table 13. At this time, the first 2 bits and the last 2 bits of the 4 bits may be used to indicate the DMRS ports associated with different PTRS ports.

[0138] In another embodiment, whether the DMRS type is type 1 or type 2, as long as the length of the frequency domain OCC is 2, the same PTRS-DMRS port association indication information length and PTRS-DMRS port association relationship may be used. In this case, the PTRS-DMRS port association relationship may be as shown in Table 13. At this time, if the DMRS type is type 1, the communication device may only use the first few states in the PTRS-DMRS port association relationship, that is, indicate one DMRS port from the two DMRS ports that each PTRS port may be associated with.

[0139] In some implementations, when the length of the frequency domain OCC is 4, the information length may be 2*log2(N / 2) bits, and the PTRS-DMRS port association relationship may include a correspondence between the PTRS-DMRS port association indication and the N / 2 DMRS ports associated with each PTRS port candidate. Wherein, N is the maximum number of transmission layers currently supported by the uplink, and the value is 4 or 8. The value of N may be configured by the network device through high-level signaling, or the value of N may be determined based on the capability report of the terminal device, or the value of N may be fixed to 8. When the value of N is 8 and the length of the frequency domain OCC is 4, the PTRS-DMRS port association relationship may be as shown in Table 14.

[0140] As an implementation manner, when the value of N is 4, Table 12 can be used to represent the PTRS-DMRS port association relationship; when the value of N is 8, Table 14 can be used to represent the PTRS-DMRS port association relationship.

[0141] In some embodiments, of the 2*log2(N / 2) bits of information, the first log2(N) / 2 bits may be used to indicate the DMRS port associated with the first PTRS port (PTRS port 0), and the second log2(N) / 2 bits may be used to indicate the DMRS port associated with the second PTRS port (PTRS port 1). Alternatively, the first log2(N) / 2 bits may be used to indicate the DMRS port associated with the second PTRS port (PTRS port 1), and the second log2(N) / 2 bits may be used to indicate the DMRS port associated with the first PTRS port (PTRS port 0).

[0142] Table 14

[0143]

[0144] In some embodiments, when the information length is determined, the terminal device can obtain the corresponding PTRS-DMRS port association indication from the DCI according to the information length.

[0145] In some embodiments, the terminal device may determine the DMRS port associated with the PTRS port according to the PTRS-DMRS port association relationship and the PTRS-DMRS port association indication.

[0146] In some embodiments, the terminal device determines the sequence, frequency domain resources and precoding matrix of the PTRS according to the DMRS port associated with the PTRS port, and sends the PTRS. In some implementations, the PTRS port and the associated DMRS port can use the same sequence, frequency domain resources and precoding matrix.

[0147] In some embodiments, the network device may determine the sequence and frequency domain resources of the PTRS according to the DMRS port associated with the PTRS port, and receive the PTRS.

[0148] It should be noted that Tables 4 to 14 are only one implementation method provided in the embodiments of the present application. The implementation method and the specific values ​​therein can be adjusted according to actual conditions, and the present application does not impose any restrictions.

[0149] The above describes the method embodiment of the present application in detail. Figures 4 to 6 , describes the device embodiment of the present application in detail. It should be understood that the description of the method embodiment corresponds to the description of the device embodiment, so the parts not described in detail can refer to the previous method embodiment.

[0150] Figure 4 The present invention provides a schematic structural diagram of a terminal device 400 provided in an embodiment of the present application. The terminal device 400 may include a first determining unit 410 and a second determining unit 420.

[0151] The first determination unit 410 is used to determine the PTRS information according to the DMRS configuration; the second determination unit 420 is used to determine the transmission parameters of the PTRS according to the PTRS information; wherein the PTRS information includes one or more of the following information: PTRS power boost value information, the association relationship between the PTRS port and the DMRS port, and the information length of the PTRS port and DMRS port association indication in the DCI; wherein the DMRS configuration includes the length of the frequency domain orthogonal cover code OCC.

[0152] In some embodiments, the DMRS configuration further includes a DMRS type.

[0153] In some embodiments, if the length of the frequency domain OCC is 2, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4, or, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6; if the length of the frequency domain OCC is 4, the PTRS power boost value information indicates the PTRS power boost value when the number of transmission layers is 1-8.

[0154] In some embodiments, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4; if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6.

[0155] In some embodiments, when the number of PTRS ports is 1, if the length of the frequency domain OCC is 2, the association relationship between the PTRS port and the DMRS port includes a correspondence between the PTRS port and the DMRS port association indication in the DCI and 4 or 6 DMRS ports associated with the PTRS port candidate; when the number of PTRS ports is 1, if the length of the frequency domain OCC is 4, the association relationship between the PTRS port and the DMRS port includes a correspondence between the PTRS port and the DMRS port association indication and 8 or 4 DMRS ports associated with the PTRS port candidate, and 4 of the 8 or 4 DMRS ports correspond to the same codeword.

[0156] In some embodiments, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the PTRS port and DMRS port association relationship includes the correspondence between the PTRS port and DMRS port association indication and the four DMRS ports associated with the PTRS port candidate; if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the PTRS port and DMRS port association relationship includes the correspondence between the PTRS port and DMRS port association indication and the six DMRS ports associated with the PTRS port candidate.

[0157] In some embodiments, if the length of the frequency domain OCC is 4, the number of DMRS ports associated with the PTRS candidate is determined according to high-layer signaling.

[0158] In some embodiments, when the number of PTRS ports is 2, if the length of the frequency domain OCC is 2, the association relationship between the PTRS port and the DMRS port includes the correspondence between the PTRS port and the DMRS port association indication in the DCI and the 2 or 3 DMRS ports associated with the PTRS port candidate; when the number of PTRS ports is 2, if the length of the frequency domain OCC is 4, the association relationship between the PTRS port and the DMRS port includes the correspondence between the PTRS port and the DMRS port association indication and the N / 2 DMRS ports associated with the PTRS port candidate, where N is the maximum number of transmission layers currently supported by the uplink, and the value of N is 4 or 8.

[0159] In some embodiments, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the PTRS port and DMRS port association relationship includes the correspondence between the PTRS port and DMRS port association indication and the two DMRS ports associated with the PTRS port candidate; if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the PTRS port and DMRS port association relationship includes the correspondence between the PTRS port and DMRS port association indication and the three DMRS ports associated with the PTRS port candidate.

[0160] In some embodiments, when the number of PTRS ports is 1, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the information length is 2 bits; when the number of PTRS ports is 1, if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the information length is 3 bits; when the number of PTRS ports is 1, if the length of the frequency domain OCC is 4, the information length is 2 bits, or the information length is 3 bits.

[0161] In some embodiments, if the length of the frequency domain OCC is 4, the information length is determined based on high-layer signaling.

[0162] In some embodiments, the high-layer signaling is PTRS and DMRS association relationship indication information or indication information for enabling uplink layer 8 transmission.

[0163] In some embodiments, when the number of PTRS ports is 2, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the information length is 2 bits; when the number of PTRS ports is 2, if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the information length is 4 bits; when the number of PTRS ports is 2, if the length of the frequency domain OCC is 4, the information length is 2*log2(N / 2) bits, where N is the maximum number of transmission layers currently supported by the uplink, and the value of N is 4 or 8.

[0164] In some embodiments, the second determination unit is specifically used for one or more of the following: determining the power boost value of the PTRS port according to the PTRS power boost value information and the current number of transmission layers, and the power boost value is used to determine the transmit power of the PTRS; determining the DMRS port associated with the PTRS port according to the association relationship between the PTRS port and the DMRS port and the PTRS port and DMRS port association indication in the DCI; determining the PTRS port and DMRS port association indication in the DCI according to the information length of the PTRS port and DMRS port association indication, and the PTRS port and DMRS port association indication is used to determine the DMRS port associated with the PTRS port.

[0165] In some embodiments, the terminal device 400 further includes: a sending unit, configured to determine the sequence, frequency domain resources and precoding matrix of the PTRS according to the DMRS port associated with the PTRS port, and send the PTRS.

[0166] In some embodiments, the PTRS power boost value information is represented by a table; and / or the association relationship between the PTRS port and the DMRS port is represented by a table.

[0167] Figure 5 A schematic structural diagram of a network device 500 provided in an embodiment of the present application. The network device 500 includes a third determining unit 510 and a fourth determining unit 520.

[0168] The third determination unit 510 is used to determine the phase tracking reference signal PTRS information according to the demodulation reference signal DMRS configuration; the fourth determination unit 520 is used to determine the transmission parameters of the PTRS according to the PTRS information; wherein the PTRS information includes one or more of the following information: PTRS power boost value information, the association relationship between the PTRS port and the DMRS port, and the information length of the PTRS port and DMRS port association indication in the downlink control information DCI; wherein the DMRS configuration includes the length of the frequency domain orthogonal cover code OCC.

[0169] In some embodiments, the DMRS configuration further includes a DMRS type.

[0170] In some embodiments, it is characterized in that if the length of the frequency domain OCC is 2, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4, or, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6; if the length of the frequency domain OCC is 4, the PTRS power boost value information indicates the PTRS power boost value when the number of transmission layers is 1-8.

[0171] In some embodiments, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4; if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6.

[0172] In some embodiments, when the number of PTRS ports is 1, if the length of the frequency domain OCC is 2, the association relationship between the PTRS port and the DMRS port includes a correspondence between the PTRS port and the DMRS port association indication in the DCI and 4 or 6 DMRS ports associated with the PTRS port candidate; if the length of the frequency domain OCC is 4, the association relationship between the PTRS port and the DMRS port includes a correspondence between the PTRS port and the DMRS port association indication and 8 or 4 DMRS ports associated with the PTRS port candidate, and 4 of the 8 or 4 DMRS ports correspond to the same codeword.

[0173] In some embodiments, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the PTRS port and DMRS port association relationship includes the correspondence between the PTRS port and DMRS port association indication and the four DMRS ports associated with the PTRS port candidate; if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the PTRS port and DMRS port association relationship includes the correspondence between the PTRS port and DMRS port association indication and the six DMRS ports associated with the PTRS port candidate.

[0174] In some embodiments, if the length of the frequency domain OCC is 4, the number of DMRS ports associated with the PTRS candidate is determined according to high-layer signaling.

[0175] In some embodiments, when the number of PTRS ports is 2, if the length of the frequency domain OCC is 2, the association relationship between the PTRS port and the DMRS port includes a correspondence between the PTRS port and the DMRS port association indication in the DCI and two or three DMRS ports associated with the PTRS port candidate; when the number of PTRS ports is 2, if the length of the frequency domain OCC is 4, the association relationship between the PTRS port and the DMRS port includes a correspondence between the PTRS port and the DMRS port association indication and N / 2 DMRS ports associated with the PTRS port candidate, where N is the maximum number of transmission layers currently supported by the uplink, and the value of N is 4 or 8.

[0176] In some embodiments, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the PTRS port and DMRS port association relationship includes the correspondence between the PTRS port and DMRS port association indication and the two DMRS ports associated with the PTRS port candidate; if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the PTRS port and DMRS port association relationship includes the correspondence between the PTRS port and DMRS port association indication and the three DMRS ports associated with the PTRS port candidate.

[0177] In some embodiments, when the number of PTRS ports is 1, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the information length is 2 bits; when the number of PTRS ports is 1, if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the information length is 3 bits; when the number of PTRS ports is 1, if the length of the frequency domain OCC is 4, the information length is 2 bits, or the information length is 3 bits.

[0178] In some embodiments, if the length of the frequency domain OCC is 4, the information length is determined based on high-layer signaling.

[0179] In some embodiments, the high-layer signaling is PTRS and DMRS association relationship indication information or indication information for enabling uplink layer 8 transmission.

[0180] In some embodiments, when the number of PTRS ports is 2, if the length of the frequency domain OCC is 2 and the DMRS type is type 1, the information length is 2 bits; when the number of PTRS ports is 2, if the length of the frequency domain OCC is 2 and the DMRS type is type 2, the information length is 4 bits; when the number of PTRS ports is 2, if the length of the frequency domain OCC is 4, the information length is 2*log2(N / 2) bits, where N is the maximum number of transmission layers currently supported by the uplink, and the value of N is 4 or 8.

[0181] In some embodiments, the fourth determination unit is specifically used for one or more of the following: determining the power boost value of the PTRS port based on the PTRS power boost value information and the current number of transmission layers, and the power boost value is used to determine the transmit power of the PTRS; determining the DMRS port associated with the PTRS port based on the association relationship between the PTRS port and the DMRS port and the PTRS port and DMRS port association indication in the DCI; determining the PTRS port and DMRS port association indication in the DCI based on the information length of the PTRS port and DMRS port association indication, and the PTRS port and DMRS port association indication is used to determine the DMRS port associated with the PTRS port.

[0182] In some embodiments, the network device 500 further includes: a phase tracking unit, configured to perform phase tracking based on the detected PTRS and DMRS according to the power boost value of the PTRS port.

[0183] In some embodiments, the PTRS power boost value information is represented by a table; and / or the association relationship between the PTRS port and the DMRS port is represented by a table.

[0184] In an optional embodiment, the sending unit may be a transceiver 630, and the first determining unit 410, the second determining unit 420, the third determining unit 430 or the fourth determining unit may be a processor 610. The terminal device 400 or the network device 500 may further include a memory 620, specifically as follows Figure 6 shown.

[0185] Figure 6 It is a schematic structural diagram of a device for communication according to an embodiment of the present application. Figure 6 The dotted line in the figure indicates that the unit or module is optional. The device 600 can be used to implement the method described in the above method embodiment. The device 600 can be a chip, a terminal device or a network device.

[0186] The device 600 may include one or more processors 610. The processor 610 may support the device 600 to implement the method described in the above method embodiment. The processor 610 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0187] The apparatus 600 may further include one or more memories 620. The memory 620 stores a program, which can be executed by the processor 610, so that the processor 610 executes the method described in the above method embodiment. The memory 620 may be independent of the processor 610 or integrated in the processor 610.

[0188] The apparatus 600 may further include a transceiver 630. The processor 610 may communicate with other devices or chips through the transceiver 630. For example, the processor 610 may transmit and receive data with other devices or chips through the transceiver 630.

[0189] The present application also provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to a terminal or network device provided in the present application, and the program enables a computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0190] The embodiment of the present application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal or network device provided in the embodiment of the present application, and the program enables the computer to execute the method performed by the terminal or network device in each embodiment of the present application.

[0191] The embodiment of the present application also provides a computer program. The computer program can be applied to the terminal or network device provided in the embodiment of the present application, and the computer program enables a computer to execute the method executed by the terminal or network device in each embodiment of the present application.

[0192] It should be understood that the terms "system" and "network" in this application can be used interchangeably. In addition, the terms used in this application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. The terms "first", "second", "third" and "fourth" in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions.

[0193] In the embodiments of the present application, the "indication" mentioned can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.

[0194] In the embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0195] In the embodiments of the present application, the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or an association relationship between the two, or a relationship of indication and being indicated, configuration and being configured, etc.

[0196] In the embodiments of the present application, "pre-definition" or "pre-configuration" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method. For example, pre-definition can refer to what is defined in the protocol.

[0197] In the embodiments of the present application, the “protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.

[0198] In the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0199] In various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0200] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0201] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0202] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0203] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0204] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: include: The terminal device determines the phase tracking reference signal PTRS information according to the demodulation reference signal DMRS configuration; The terminal device determines a PTRS transmission parameter according to the PTRS information; The PTRS information includes one or more of the following information: PTRS power boost value information, association relationship between PTRS port and DMRS port, and information length of PTRS port and DMRS port association indication in downlink control information DCI; The DMRS configuration includes the length of the frequency domain orthogonal cover code OCC.

2. The method according to claim 1, characterized in that The DMRS configuration also includes a DMRS type.

3. The method according to claim 1 or 2, characterized in that: If the DMRS configuration is a Rel-15 DMRS, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4, or the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6; If the DMRS configuration is an enhanced DMRS of Rel-18, the PTRS power boost value information indicates a PTRS power boost value when the number of transmission layers is 1-8.

4. The method according to claim 3, characterized in that The length of the frequency domain OCC corresponding to the DMRS of Rel-15 is 2, and the length of the frequency domain OCC corresponding to the enhanced DMRS of Rel-18 is 4.

5. The method according to any one of claims 1 to 4, characterized in that The length of the frequency domain OCC is configured through high-layer signaling.

6. The method according to claim 3, characterized in that If the DMRS configuration is a Rel-15 DMRS and the DMRS type is type 1, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4; If the DMRS configuration is an enhanced DMRS of Rel-18 and the DMRS type is type 2, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6.

7. The method according to any one of claims 1 to 6, characterized in that When the PTRS port number is 1, If the length of the frequency domain OCC is 2, the PTRS port and DMRS port association relationship includes a PTRS port and DMRS port association indication in the DCI, and a correspondence between four or six DMRS ports associated with the PTRS port candidate; If the length of the frequency domain OCC is 4, the association relationship between the PTRS port and the DMRS port includes the PTRS port and the DMRS port association indication, and the correspondence between the 8 or 4 DMRS ports associated with the PTRS port candidate, and 4 of the 8 or 4 DMRS ports correspond to the same codeword.

8. A communication method, characterized in that: include: The network device determines the phase tracking reference signal PTRS information according to the demodulation reference signal DMRS configuration; The network device determines a PTRS transmission parameter according to the PTRS information; The PTRS information includes one or more of the following information: PTRS power boost value information, association relationship between PTRS port and DMRS port, and information length of PTRS port and DMRS port association indication in downlink control information DCI; The DMRS configuration includes the length of the frequency domain orthogonal cover code OCC.

9. The method according to claim 8, characterized in that The DMRS configuration also includes a DMRS type.

10. The method according to claim 8 or 9, characterized in that: If the DMRS configuration is a Rel-15 DMRS, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4, or the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6; If the DMRS configuration is an enhanced DMRS of Rel-18, the PTRS power boost value information indicates a PTRS power boost value when the number of transmission layers is 1-8.

11. The method according to claim 10, characterized in that The length of the frequency domain OCC corresponding to the DMRS of Rel-15 is 2, and the length of the frequency domain OCC corresponding to the enhanced DMRS of Rel-18 is 4.

12. The method according to any one of claims 8 to 11, characterized in that The length of the frequency domain OCC is configured through high-layer signaling.

13. The method according to claim 10, characterized in that If the DMRS configuration is a Rel-15 DMRS and the DMRS type is type 1, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4; If the DMRS configuration is an enhanced DMRS of Rel-18 and the DMRS type is type 2, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6.

14. The method according to any one of claims 8 to 13, characterized in that: When the PTRS port number is 1, If the length of the frequency domain OCC is 2, the PTRS port and DMRS port association relationship includes a PTRS port and DMRS port association indication in the DCI, and a correspondence between four or six DMRS ports associated with the PTRS port candidate; If the length of the frequency domain OCC is 4, the association relationship between the PTRS port and the DMRS port includes the PTRS port and the DMRS port association indication, and the correspondence between the 8 or 4 DMRS ports associated with the PTRS port candidate, and 4 of the 8 or 4 DMRS ports correspond to the same codeword.

15. A terminal device, characterized in that: include: A first determining unit, configured to determine phase tracking reference signal PTRS information according to a demodulation reference signal DMRS configuration; A second determining unit, configured to determine a PTRS transmission parameter according to the PTRS information; The PTRS information includes one or more of the following information: PTRS power boost value information, association relationship between PTRS port and DMRS port, and information length of PTRS port and DMRS port association indication in downlink control information DCI; The DMRS configuration includes the length of the frequency domain orthogonal cover code OCC.

16. The terminal device according to claim 15, characterized in that: If the DMRS configuration is a Rel-15 DMRS, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4, or the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6; If the DMRS configuration is an enhanced DMRS of Rel-18, the PTRS power boost value information indicates a PTRS power boost value when the number of transmission layers is 1-8.

17. The terminal device according to claim 16, characterized in that: The length of the frequency domain OCC corresponding to the DMRS of Rel-15 is 2, and the length of the frequency domain OCC corresponding to the enhanced DMRS of Rel-18 is 4.

18. The terminal device according to any one of claims 15 to 17, characterized in that: The length of the frequency domain OCC is configured through high-layer signaling.

19. A network device, characterized in that: include: A third determining unit, configured to determine phase tracking reference signal PTRS information according to a demodulation reference signal DMRS configuration; a fourth determining unit, configured to determine a transmission parameter of a PTRS according to the PTRS information; The PTRS information includes one or more of the following information: PTRS power boost value information, association relationship between PTRS port and DMRS port, and information length of PTRS port and DMRS port association indication in downlink control information DCI; The DMRS configuration includes the length of the frequency domain orthogonal cover code OCC.

20. The network device according to claim 19, characterized in that: If the DMRS configuration is a Rel-15 DMRS, the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-4, or the PTRS power boost value information only indicates the PTRS power boost value when the number of transmission layers is 1-6; If the DMRS configuration is an enhanced DMRS of Rel-18, the PTRS power boost value information indicates a PTRS power boost value when the number of transmission layers is 1-8.

21. The network device according to claim 20, characterized in that: The length of the frequency domain OCC corresponding to the DMRS of Rel-15 is 2, and the length of the frequency domain OCC corresponding to the enhanced DMRS of Rel-18 is 4.

22. The network device according to any one of claims 19 to 21, characterized in that: The length of the frequency domain OCC is configured through high-layer signaling.

23. A terminal device, characterized in that: The method comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the terminal device executes the method according to any one of claims 1 to 7.

24. A network device, characterized in that: The device comprises a memory and a processor, wherein the memory is used to store a program, and the processor is used to call the program in the memory so that the network device executes the method according to any one of claims 8 to 14.

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