Communication method and device

Abstract

The invention relates to a communication method and device, in the method, under the condition that first information is used for indicating an SDM mode or an SFN mode, second information can comprise two PRS-DMRS fields, and one of the PRS-DMRS fields is 0 bit. In this way, the bit overhead of the DCI can be reduced. In addition, the first field in the second information also clearly indicates which transmission mode the terminal equipment specifically adopts.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0002] In communication technology, a base station can schedule a terminal device through downlink control information (DCI). Generally speaking, a large amount of information needs to be indicated in DCI to facilitate subsequent uplink transmission by the terminal device. In other words, it takes a lot of bits to indicate a large amount of information. Therefore, the bit overhead of DCI is too large. Summary of the invention

[0003] The present application provides a communication method and device, which can reduce the bit overhead of DCI.

[0004] In the first aspect, a communication method is provided, which can be executed by a terminal device, or by a module (such as a processor, a chip, or a chip system, etc.) applied to the terminal device, or by a logical node, a logical module, or software that can realize all or part of the functions of the terminal device. In the communication method, a first information can be received, and the first information is used to indicate a first transmission mode, and the first transmission mode includes a spatial domain multiplexing (SDM) mode or a single frequency network (SFN) mode; a second information can also be received, and the second information includes a first field, and the first field is used to indicate that the terminal device adopts the first transmission mode or the second transmission mode, and the second transmission mode is a single transmission receiving point (sTRP) mode; wherein the second information also includes a second field and a third field, the second field is a phase tracking reference signal (PTRS)-demodulation reference signal (DMRS) field, and the third field is a second PTRS-DMRS field, and the third field is 0 bits.

[0005] It can be seen that in the above implementation, when the first information is used to indicate the SDM mode or the SFN mode, the second information may include two PTRS-DMRS fields, one of which is 0 bits. In this way, the bit overhead of the DCI can be reduced. In addition, the first field in the second information also clearly indicates which transmission mode the terminal device specifically adopts.

[0006] Optionally, in combination with the first aspect, the second field is used to indicate at least one DMRS port associated with at least one PTRS port.

[0007] Optionally, in combination with the first aspect, when the maximum number of streams associated with the second transmission mode is greater than 2, the third field is 0 bits; wherein the maximum number of streams associated with the second transmission mode is indicated by the third information.

[0008] Optionally, in combination with the first aspect, the method further includes: sending capability information, the capability information being used to indicate that the terminal device supports fully coherent uplink transmission; and the number of PTRS ports associated with the SDM mode is greater than or equal to 2.

[0009] It can be seen that in the above implementation, when the terminal device supports fully coherent uplink transmission, the number of PTRS ports associated with the SDM mode is greater than or equal to 2, so that when the terminal device transmits data in the SDM mode, different antenna panels can be associated with different PTRS ports, ensuring reliable SDM transmission.

[0010] Optionally, in combination with the first aspect, when the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the second field is 0 bits; wherein the maximum number of streams associated with the first transmission mode is indicated by the fourth information, and the maximum number of streams associated with the second transmission mode is indicated by the third information.

[0011] It can be seen that in the above implementation, the condition that the second field is 0 bits is clarified, thereby ensuring reliable SDM transmission or SFN transmission. In addition, when the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the network device does not need to indicate the DMRS port associated with the PTRS port to the terminal device, which can reduce the bit overhead of the DCI.

[0012] Optionally, in combination with the first aspect, when the maximum number of streams associated with the first transmission mode is greater than 1 or the maximum number of streams associated with the second transmission mode is greater than 1, the second field is greater than 0 bits; wherein the maximum number of streams associated with the first transmission mode is indicated by the fourth information, and the maximum number of streams associated with the second transmission mode is indicated by the third information.

[0013] It can be seen that in the above implementation, the condition that the second field is greater than 0 bits is clarified, thereby ensuring reliable SDM transmission or SFN transmission. This also shows that when the maximum number of streams associated with the first transmission mode is greater than 1 or the maximum number of streams associated with the second transmission mode is greater than 1, the network device needs to indicate the DMRS port associated with the PTRS port to the terminal device.

[0014] In the second aspect, a communication method is provided, which can be executed by a network device, or by a module (such as a processor, a chip, or a chip system, etc.) applied to the network device, or by a logical node, a logical module, or software that can realize all or part of the network device functions. In the communication method, first information can be sent, and the first information is used to indicate a first transmission mode, and the first transmission mode includes an SDM mode or an SFN mode; second information can also be sent, and the second information includes a first field, and the first field is used to indicate that the terminal device adopts the first transmission mode or the second transmission mode, and the second transmission mode is an sTRP mode; wherein the second information also includes a second field and a third field, the second field is a PTRS-DMRS field, the third field is a second PTRS-DMRS field, and the third field is 0 bits.

[0015] Optionally, in combination with the second aspect, the second field is used to indicate at least one DMRS port associated with at least one PTRS port.

[0016] Optionally, in combination with the second aspect, when the maximum number of streams associated with the second transmission mode is greater than 2, the third field is 0 bits; wherein the maximum number of streams associated with the second transmission mode is indicated by the third information.

[0017] Optionally, in combination with the second aspect, the method further includes: sending capability information, the capability information being used to indicate that the terminal device supports fully coherent uplink transmission; and the number of PTRS ports associated with the SDM mode is greater than or equal to 2.

[0018] Optionally, in combination with the second aspect, when the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the second field is 0 bits; wherein the maximum number of streams associated with the first transmission mode is indicated by the fourth information, and the maximum number of streams associated with the second transmission mode is indicated by the third information.

[0019] Optionally, in combination with the second aspect, when the maximum number of streams associated with the first transmission mode is greater than 1 or the maximum number of streams associated with the second transmission mode is greater than 1, the second field is greater than 0 bits; wherein the maximum number of streams associated with the first transmission mode is indicated by the fourth information, and the maximum number of streams associated with the second transmission mode is indicated by the third information.

[0020] According to a third aspect, a communication device is provided, comprising a unit or module for implementing the method as described in any one of the first aspect or the second aspect.

[0021] In a fourth aspect, a communication device is provided, comprising at least one processor and a memory; wherein the memory is used to store computer programs or instructions; and at least one processor is used to execute the computer programs or instructions in the memory, so that the method described in any one of the first aspect or the second aspect is executed.

[0022] In a fifth aspect, a communication system is provided, the communication system comprising a terminal device and a network device; the terminal device is used to execute the method as described in any one of the first aspects; the network device is used to execute the method as described in any one of the second aspects.

[0023] In a sixth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed, the computer executes the method as described in any one of the first aspect or the second aspect.

[0024] In a seventh aspect, a computer program product is provided, the computer program product comprising: a computer program code, and when the computer program code is executed by a computer, the computer executes the method as described in any one of the first aspect or the second aspect.

[0025] In an eighth aspect, a chip is provided, comprising at least one processor and an interface, wherein the processor is used to read and execute instructions stored in a memory, and when the instructions are executed, the chip executes a method as described in any one of the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following is a brief introduction to the drawings required for describing the embodiments.

[0027] Figure 1 A basic architecture of a communication system provided in an embodiment of the present application;

[0028] Figure 2 A flow chart of a communication method provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0030] Figure 4 A schematic diagram of the structure of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Among them, the terms "system" and "network" in the embodiments of the present application can be used interchangeably. Unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship. For example, A / B can represent A or B; "and / or" in this application 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. These three situations, where A and B can be singular or plural. And, in the description of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, and (or) c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be one or more. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between network elements and identical or similar items with substantially the same functions. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference.

[0032] References to "one embodiment" or "some embodiments" etc. described in the embodiments of the present application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0033] The following specific implementation methods further describe in detail the objectives, technical solutions and beneficial effects of the present application. It should be understood that the following are only specific implementation methods of the present application and are not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the scope of protection of the present application.

[0034] In the various embodiments of the present application, unless otherwise specified or provided in a logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0035] It should be understood that the technical solutions of the embodiments of the present application can be applied to the long term evolution (LTE) architecture, the fifth generation mobile communication technology (5G), wireless local area networks (WLAN) system, vehicle to everything (V2X) communication system, LTE-vehicle (LTE-V), vehicle to vehicle (V2V), vehicle networking, machine type communications (MTC), etc. The technical solutions of the embodiments of the present application can also be applied to other future communication systems, such as 6G communication systems, etc. In future communication systems, the functions may remain the same, but the names may change.

[0036] The following describes the basic architecture of the communication system provided by the embodiment of the present application. The communication system provided by the present application may include one or more network devices and one or more terminal devices.

[0037] Below Figure 1 The system architecture shown is explained as an example. Figure 1 As shown, the communication system includes a network device 10 and one or more terminal devices (such as Figure 1 The terminal device 20 in the device).

[0038] It should be pointed out that Figure 1 The number of network devices and terminal devices is only for illustration and should not be regarded as a specific limitation of the present application. The terminal devices and network devices involved in the system architecture are described in detail below.

[0039] 1. Terminal equipment

[0040] Terminal equipment is an entity on the user side that is used to receive signals, or send signals, or receive and send signals. Terminal equipment is used to provide one or more of voice services and data connectivity services to users. Terminal equipment can be a device that includes wireless transceiver functions and can cooperate with network equipment to provide communication services to users. Specifically, terminal equipment can refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, terminal, wireless communication equipment, user agent, user device or road side unit (RSU). The terminal device may also be a drone, an Internet of Things (IoT) device, a station (ST) in a wireless local area network (WLAN), a cellular phone, a smart phone, a cordless phone, a wireless data card, a tablet computer, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a laptop computer, a machine type communication (MTC) terminal, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device (also referred to as a wearable smart device), a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in remote medical care, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in smart grid, a transportation safety (transportation) device, a wearable device (also referred to as a wearable smart device), a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in remote medical care, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in smart grid, a wireless terminal in transportation safety (transportation) device, a wireless terminal in wireless communication (mobile phone), ... The terminal device may be a wireless terminal in a 5G system or a terminal in a next-generation communication system, which is not limited in the embodiments of the present application.

[0041] The embodiments of the present application do not limit the device form of the terminal device. The device for realizing the function of the terminal device can be the terminal device; it can also be a device that can support the terminal device to realize the function, such as a chip system. The device can be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system can be composed of chips, or it can include chips and other discrete devices.

[0042] 2. Network equipment

[0043] A network device is an entity on the network side that is used to send signals, or receive signals, or both send and receive signals. A network device may be a device deployed in a radio access network (RAN) to provide wireless communication functions for terminal devices.

[0044] In one possible scenario, the network device may be a device with base station functions, such as an evolved NodeB (eNodeB), a transmission and receiving point (TRP), a transmitting point (TP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, an integrated access and backhaul (IAB) node, a non-ground network device in an NTN, i.e., a device that can be deployed on a high altitude platform or a satellite, etc. The network device may be a transmission reception point (TRP), a base station, or various forms of control nodes. For example, a network controller, a wireless controller, etc. Specifically, the network device may be various forms of macro base stations, micro base stations (also called small stations) in heterogeneous network (HetNet) scenarios, relay stations, access points (APs), radio network controllers (RNCs), node Bs (NBs), base station controllers (BSCs), base transceiver stations (BTSs), home base stations (e.g., home evolved node Bs, or home node Bs, HNBs), baseband units (BBUs) and remote radio units (RRUs) in distributed base station scenarios, transmission points (TRPs), transmitting points (TPs), mobile switching centers, etc., and may also be antenna panels of base stations. The control node may connect to multiple base stations and configure resources for multiple terminals covered by multiple base stations. In systems using different wireless access technologies, the names of devices with base station functions may be different. For example, it may be the gNB in ​​5G, or the network side equipment in the network after 5G, or the network equipment in the future evolved public land mobile (communication) network (publicland mobile network, PLMN) network, or the equipment that performs the base station function in device-to-device (D2D) communication, machine-to-machine (M2M) communication, and Internet of Vehicles communication, etc. This application does not limit the specific name of the network equipment.The network equipment may also be an open access network (openRAN, O-RAN or ORAN), a baseband pool (BBU pool) and RRU under a cloud radio access network (CRAN), etc.

[0045] All or part of the functions of the network device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform). The network device in this application can also be a logical node, logical module or software that can implement all or part of the network device functions.

[0046] In another possible scenario, multiple network devices collaborate to assist the terminal device in achieving wireless access, and different network devices respectively implement part of the functions of the base station. For example, the network device may include a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU may be set separately, or may be included in the same network element, such as a baseband unit (BBU). The RU may be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). It is understandable that the network device may be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into a network device in the access network RAN, or the CU may be divided into a network device in the core network CN, without limitation here.

[0047] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, CU, CU-CP, CU-UP, DU and RU are described as examples in this application. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0048] In the embodiments of the present application, the form of the network device is not limited. The device for realizing the function of the network device can be the network device; or it can be a device that can support the network device to realize the function, such as a chip system. The device can be installed in the network device or used in combination with the network device.

[0049] In order to facilitate the understanding of the content of this solution, some of the terms involved in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art. This part is only for ease of understanding and cannot be regarded as a specific limitation of the present application.

[0050] 1. Antenna port

[0051] In this application, an antenna port can be understood as a transmitting antenna that can be identified by a receiving device, or a transmitting antenna that can be distinguished in space. An antenna port can be, for example, a physical antenna on a transmitting device, or a weighted combination of multiple physical antennas on a transmitting device.

[0052] Among them, one antenna port can correspond to one reference signal, that is, the antenna port used to send and / or receive the reference signal can be called a reference signal port, such as a PTRS port, a DMRS port, etc.

[0053] 2. SDM mode

[0054] The SDM mode is to simultaneously send a transport block (or the same transport block, or the same transport block) according to at least two precoding information and number of layers (precoding information and number of layers) or at least two channel sounding reference signal resource indicators (SRS resource indicator, SRI), and different precoding information and number of layers or different SRIs are associated with different parts of a transport block.

[0055] Alternatively, the SDM mode refers to at least two antenna panels sending the same transmission block simultaneously, wherein different antenna panels send different parts of the transmission block. Optionally, at least two antenna panels may be located on the terminal device.

[0056] It should be understood that, here, the same transport block or the same transport block means that the information (or data) carried in two or more transport blocks is the same. Alternatively, the same transport block or the same transport block refers to different redundancy versions of a transport block.

[0057] In the present application, an antenna panel may be referred to as a panel. An antenna panel may be a group of antennas. Optionally, the antenna panel mentioned in the present application may also be described as an antenna set. Among them, an antenna set may be an antenna set that can independently or individually control the transmission power. An antenna set may also be an antenna set that can independently or individually perform timing. An antenna set may also be an antenna set that can independently or individually perform modulation coding.

[0058] Optionally, the antenna panel may be a capability value set in a capability value set list of the terminal device. Therefore, the antenna panel mentioned in the present application may also be described as a "capability set". Among them, the capability value set may include the number of channel sounding reference signal (SRS) ports, the maximum number of SRS ports, the number of layers sent by uplink (UL), the maximum number of layers sent by UL, the coherence type of the antenna port, etc.

[0059] Optionally, there is a correspondence between the capability value set and the synchronization signal and physical broadcast channel block (SSB) resource indicator (SSBRI), or there is a correspondence between the capability value set and the channel state information reference signal (CSI-RS) resource indicator (CRI-RS resource indicator, CRI). Thus, an antenna panel can also refer to an SSBRI or CRI.

[0060] Optionally, the antenna panel mentioned in this application may also be described as SSBRI or CRI.

[0061] Optionally, the correspondence between the capability value set and the SSBRI, or the correspondence between the capability value set and the CRI can be determined by the terminal device. The terminal device can report the correspondence between the capability value set and the SSBRI, or the correspondence between the capability value set and the CRI to the network device in the beam reporting. Alternatively, the terminal device can report the capability value set, SSBRI or CRI to the network device.

[0062] Optionally, the antenna panel mentioned in the present application may be an SRS set. Therefore, the antenna panel mentioned in the present application may also be referred to as an SRS set.

[0063] Optionally, the definition of an antenna panel may be dynamically changed, for example, at time 1, an antenna panel includes a capability set of 4 SRS ports. At time 2 after time 1, the antenna panel may include a capability set of 2 SRS ports.

[0064] 3. SFN mode

[0065] The SFN mode is to simultaneously send a transport block (or the same transport block, or the same transport block) according to at least two precoding information and layer numbers or at least two SRIs, and different precoding information and layer numbers or different SRIs are associated with the same part of a transport block.

[0066] Alternatively, the SFN mode means that at least two antenna panels send the same transmission block simultaneously. Optionally, at least two antenna panels may be located on the terminal device.

[0067] 4. sTRP mode

[0068] The sTRP mode sends a transport block based on a precoding information and layer number or an SRI.

[0069] Or, the sTRP mode refers to the terminal device sending a transmission block to the network device through an antenna panel, the sTRP mode refers to the terminal device sending the transmission block to the network device according to an antenna panel, or the sTRP mode refers to the terminal device sending the transmission block to the network device on an antenna panel. Exemplarily, the terminal device sends a transmission block to a TRP of the network device through the antenna panel. Or the terminal device sends a transmission block to two TRPs of the network device respectively through the antenna panel.

[0070] 5. Time domain multiplexing (TDM) mode

[0071] TDM mode means that an antenna panel on the terminal device sends data to different TRPs of the network device in a time-division manner. For example, at time 1, the antenna panel sends data to one TRP of the network device, and at time 2, the antenna panel sends data to another TRP of the network device.

[0072] Alternatively, the TDM mode means that multiple antenna panels on the terminal device send data to different TRPs of the network device in a time-division manner. For example, at time 1, one antenna panel among the multiple antenna panels sends data to one TRP of the network device, and at time 2, another antenna panel among the multiple antenna panels sends data to another TRP of the network device.

[0073] Or, the TDM mode is to send the same transport block (or the same transport block) at at least two times according to at least two precoding information and the number of layers, or at least two channel sounding reference signal resource indications. For example, the TDM mode is to send the same transport block (or the same transport block) at at least two times according to two precoding information and the number of layers, or two channel sounding reference signal resource indications.

[0074] The moment can be understood as a time unit. Accordingly, the first moment and the second moment can be understood as the first time unit and the second time unit. Then the TDM mode can be understood as: sending the same transmission block in at least two time units through at least one antenna panel, wherein each time unit in the at least two time units sends the transmission block through an antenna panel. At this time, the first time unit and the second time unit do not overlap.

[0075] The time unit may include, for example, at least one of the following: a frame, a subframe, a time slot, a symbol, etc. In NR, the duration of a frame is 10 milliseconds (ms), and each frame is divided into 10 subframes, each subframe is 1 ms long. Each subframe is divided into several time slots: when the cyclic prefix (CP) is a normal cyclic prefix (NCP), each time slot consists of 14 symbols; when the cyclic prefix is ​​an extended cyclic prefix (ECP), each time slot consists of 12 symbols. Of course, with the evolution of communication technology, the number of symbols included in a time slot may also be other values, which is not limited in this application. The symbols involved in this application may be orthogonal frequency-division multiplexing (OFDM) symbols.

[0076] It should be understood that the base station can indicate the TDM mode, SDM mode or SFN mode. When the base station indicates the TDM mode, it can also indicate the terminal device to adopt the TDM mode or sTRP mode through downlink control information (DCI). When the base station indicates the SDM mode, it can also indicate the terminal device to adopt the SDM mode or sTRP mode through DCI. When the base station indicates the SFN mode, it can also indicate the terminal device to adopt the SFN mode or sTRP mode through DCI. In this way, the terminal device can send PTRS and / or DMRS according to the corresponding mode. Therefore, the terminal device also needs to know which PTRS port and / or DMRS port can be used. Generally, the terminal device can know which PTRS port and / or DMRS port to use through DCI. However, for the SDM mode, SFN mode or sTRP mode scenario, when DCI is used to indicate the PTRS port and / or DMRS port, there may be bit redundancy. That is, the bit overhead of DCI is too large. Based on this, the present application provides a communication method to solve this problem.

[0077] The following is a detailed description of the embodiments of the present application. Specifically, the terminal device in the following text may be Figure 1 The terminal devices involved, the network devices mentioned below can be Figure 1 It should be noted that the message names between network elements or the names of parameters in the messages in the following embodiments are only examples, and other names may be used in specific implementations, which are not specifically limited in the embodiments of the present application.

[0078] like Figure 2 As shown, a communication method provided in an embodiment of the present application includes but is not limited to the following steps:

[0079] 201. A terminal device receives first information, where the first information is used to indicate a first transmission mode, where the first transmission mode includes an SDM mode or an SFN mode.

[0080] Correspondingly, the network device sends the first information.

[0081] In the present application, sending can be understood as direct sending or relay sending, and correspondingly, receiving can be understood as direct receiving or relay receiving. For example, in one possible implementation, in the case of direct reception, step 201 can be understood as: the terminal device receives the first information from the network device, and correspondingly, the network device sends the first information to the terminal device. In another possible implementation, in the case of relay sending, step 201 can be understood as: the terminal device receives the first information from the network device through the relay device, and correspondingly, the network device sends the first information to the terminal device through the relay device. Among them, the relay device can be, for example, a relay base station, such as a micro base station. Alternatively, the relay device can be a relay terminal, such as an idle terminal. Alternatively, the relay device can be a relay transceiver node, such as a user terminal equipment (customer premises equipment, CPE), a relay transceiver, a relay agent and other network entities.

[0082] Optionally, the first information may be a multipanel scheme. In one possible implementation, the first information may be carried in a high-level signaling. It may also be understood that the high-level signaling configures the multipanel scheme, thereby indicating an SDM mode or an SFN mode. In another possible implementation, the high-level signaling does not configure the multipanel scheme, i.e., the default TDM mode. That is, when the terminal device receives the high-level signaling that does not configure the multipanel scheme, it may be known that the network device indicates the TDM mode.

[0083] The high-layer signaling may be, for example, radio resource control (RRC) signaling.

[0084] 202. The network device sends second information, the second information includes a first field, the first field is used to indicate that the terminal device adopts the first transmission mode or the second transmission mode, and the second transmission mode is the sTRP mode; wherein the second information also includes a second field, or the second information also includes a second field and a third field, the second field is a PTRS-DMRS field (also referred to as the first PTRS-DMRS field), the third field is a second PTRS-DMRS field, and the third field is 0 bits.

[0085] Correspondingly, the terminal device receives the second information.

[0086] Optionally, the second information may be DCI. In other words, the second information is carried in the DCI.

[0087] It should be noted that a certain field (such as the first field, the second field, or the third field, etc.) mentioned in this application can describe a domain. For example, the first field can be described as a first domain, the second field can be described as a second domain, and the third field can be described as a third domain, etc. This application does not limit the specific names.

[0088] Among them, the first field can be a channel sounding reference signal resource set indicator field (srs resource set indicator field). That is to say, when the high-level signaling configures the multipanel scheme, the network device can instruct the terminal device to adopt the SDM mode or the sTRP mode through the first field, or the network device can instruct the terminal device to adopt the SFN mode or the sTRP mode through the first field. Specifically:

[0089] 1. When the network device indicates that the terminal device adopts the SDM mode or the sTRP mode through the first field, when the value of the first field is 00 or 01, it indicates that the terminal device adopts the sTRP mode, and it can also indicate that the terminal device uses the fourth field in the second information. The fourth field can be an SRI field (also referred to as the first SRI field) or a transmission precoding matrix indicator (TPMI) field (also referred to as the first TPMI field), and the fourth field is used to indicate the precoding matrix used by the terminal device. When the value of the first field is 10, it indicates that the terminal device adopts the SDM mode, and it can also indicate that the terminal device uses the fourth field and the fifth field in the second information. The fifth field can be the second SRI field or the second TPMI field, and the fifth field is used to indicate the precoding matrix used by the terminal device. Among them, the precoding matrices indicated by the fourth field and the fifth field may be the same or different. When the value of the first field is 11, it is reserved.

[0090] 2. When the network device indicates that the terminal device adopts the SFN mode or the sTRP mode through the first field, when the value of the first field is 00 or 01, it indicates that the terminal device adopts the sTRP mode, and it can also indicate that the terminal device uses the fourth field. When the value of the first field is 10, it indicates that the terminal device adopts the SFN mode, and it can also indicate that the terminal device uses the fourth field and the fifth field. When the value of the first field is 11, it is reserved.

[0091] It should be pointed out that the value of a certain field (such as the first field, etc.) mentioned in this application and its corresponding meaning are only examples and are not limited in this application.

[0092] Optionally, when the first transmission mode is SDM mode or SFN mode, or when the high-level signaling multipanelscheme is configured as SDM mode or SFN mode, the length of the first SRI field is determined by the maximum value of the maximum number of streams associated with the SDM mode or SFN mode and the maximum number of streams associated with the sTRP mode, that is, the length of the first SRI field is determined by max{the maximum number of streams associated with the SDM mode or SFN mode, the maximum number of streams associated with the sTRP mode}. Otherwise (e.g., high-level signaling is not configured with multipanelscheme, i.e., the default TDM mode), the length of the first SRI field is determined by the maximum number of streams associated with the sTRP mode or the maximum number of streams associated with the TDM mode.

[0093] Optionally, when the first transmission mode is SDM mode or SFN mode, or when the high-level signaling multipanelscheme is configured as SDM mode or SFN mode, and the network device is configured to send a mode based on a noncodebook, the length of the first SRI field is determined by the maximum value of the maximum number of streams associated with the SDM mode or SFN mode and the maximum number of streams associated with the sTRP mode, that is, the length of the first SRI field is determined by max{the maximum number of streams associated with the SDM mode or SFN mode, the maximum number of streams associated with the sTRP mode}. Otherwise (e.g., high-level signaling is not configured with multipanelscheme, i.e., the default TDM mode), the length of the first SRI field is determined by the maximum number of streams associated with the sTRP mode or the maximum number of streams associated with the TDM mode.

[0094] Optionally, when the first transmission mode is SDM mode or SFN mode, or when the high-level signaling multipanelscheme is configured as SDM mode or SFN mode, the length of the second SRI field is determined by the maximum number of streams associated with the SDM mode or SFN mode. Otherwise (e.g., high-level signaling is not configured with multipanelscheme, i.e., the default TDM mode), the length of the second SRI field is determined by the maximum number of streams associated with the sTRP mode or the maximum number of streams associated with the TDM mode.

[0095] Optionally, when the first transmission mode is SDM mode or SFN mode, or when the high-level signaling multipanelscheme is configured as SDM mode or SFN mode, and the network device configures the sending mode as noncodebook-based, the length of the second SRI field is determined by the maximum number of streams associated with the SDM mode or SFN mode. Otherwise (e.g., high-level signaling does not configure multipanelscheme, that is, the default TDM mode), the length of the second SRI field is determined by the maximum number of streams associated with the sTRP mode or the maximum number of streams associated with the TDM mode. Optionally, when high-level signaling is not configured with multipanelscheme, the network device can indicate to the terminal device through the first field that the TDM mode or the sTRP mode is adopted. Specifically: When the value of the first field is 00 or 01, it indicates that the terminal device adopts the sTRP mode, and it can also indicate that the terminal device uses the fourth field. When the value of the first field is 10 or 11, it indicates that the terminal device adopts the TDM mode, and it can also indicate that the terminal device uses the fourth field and the fifth field. Among them, when the value of the first field is 10, it can also indicate that the terminal device first sends to the TRP associated with the channel sounding reference signal resource set 1, and then sends to the TRP associated with the channel sounding reference signal resource set 2. When the value of the first field is 11, it can also indicate that the terminal device first sends to the TRP associated with the channel sounding reference signal resource set 2, and then sends to the TRP associated with the channel sounding reference signal resource set 1.

[0096] Among them, in step 202, the second information also includes the second field, which can be understood as: the second information also includes the second field, and does not include the third field. That is, when the first information indicates the SDM mode or the SFN mode, the second information includes the second field, and does not include the third field. That is, when the high-level signaling configures the multipanelscheme, the second information includes the second field, and does not include the third field. Similarly, in step 202, the second information also includes the second field and the third field, and the third field is 0 bits, which can be understood as: when the first information indicates the SDM mode or the SFN mode, the second information also includes the second field and the third field, and the third field is 0 bits. That is, when the high-level signaling configures the multipanelscheme, the second information also includes the second field and the third field, and the third field is 0 bits. In this case, the second field is used to indicate at least one DMRS port associated with at least one PTRS port. For example, specifically:

[0097] 1. When the first field is used to indicate that the terminal device adopts the SDM mode or the SFN mode, the high-order bits of the second field are used to indicate the DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field (the fourth field is the SRI field or the TPMI field). The low-order bits of the second field are used to indicate the DMRS port associated with another PTRS port, and the DMRS port is associated with the fifth field (the fifth field is the second SRI field or the second TPMI field). Or, the low-order bits of the second field are used to indicate the DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field. The high-order bits of the second field are used to indicate the DMRS port associated with another PTRS port, and the DMRS port is associated with the fifth field.

[0098] 2. When the first field is used to indicate that the terminal device adopts the SDM mode, and the maximum number of PTRS ports associated with the SDM mode is 2, or when the first field is used to indicate that the terminal device adopts the SDM mode, and the number of PTRS ports (the PTRS port associated with the SDM mode) adopted by the terminal device is 2, the high-order bits of the second field are used to indicate a DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field. The low-order bits of the second field are used to indicate a DMRS port associated with another PTRS port, and the DMRS port is associated with the fifth field. Or, the low-order bits of the second field are used to indicate a DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field. The high-order bits of the second field are used to indicate a DMRS port associated with another PTRS port, and the DMRS port is associated with the fifth field.

[0099] 3. When the first field is used to indicate that the terminal device adopts the SDM mode and the maximum number of PTRS ports associated with the SDM mode is 1, or when the first field is used to indicate that the terminal device adopts the SDM mode and the number of PTRS ports adopted by the terminal device (the PTRS port is associated with the SDM mode) is 1, the second field is used to indicate a DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field and the fifth field.

[0100] 4. When the first field is used to indicate that the terminal device adopts the SFN mode, and the number of PTRS ports adopted by the terminal device (the PTRS port is associated with the SFN mode) is 1, or, when the first field is used to indicate that the terminal device adopts the sTRP mode, and the number of PTRS ports adopted by the terminal device (the PTRS port is associated with the sTRP mode) is 1, or, when the first field is used to indicate that the terminal device adopts the SFN mode, and the maximum number of PTRS ports associated with the SFN mode is 1, or, when the first field is used to indicate that the terminal device adopts the sTRP mode, and the maximum number of PTRS ports associated with the sTRP mode is 1, the second field is used to indicate a DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field.

[0101] 5. When the first field is used to indicate that the terminal device adopts the SFN mode and the number of PTRS ports adopted by the terminal device (the PTRS port is associated with the SFN mode) is 2, or, when the first field is used to indicate that the terminal device adopts the sTRP mode and the number of PTRS ports adopted by the terminal device (the PTRS port is associated with the sTRP mode) is 2, or, when the first field is used to indicate that the terminal device adopts the SFN mode and the maximum number of PTRS ports associated with the SFN mode is 2, or, when the first field is used to indicate that the terminal device adopts the sTRP mode and the maximum number of PTRS ports associated with the sTRP mode is 2, the high-order bits of the second field are used to indicate a DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field; the low-order bits of the second field are used to indicate a DMRS port associated with another PTRS port, and the DMRS port is associated with the fourth field.

[0102] 6. When the first field is used to indicate that the terminal device adopts the SFN mode and the number of PTRS ports adopted by the terminal device (the PTRS port is associated with the SFN mode) is 2, or, when the first field is used to indicate that the terminal device adopts the sTRP mode and the number of PTRS ports adopted by the terminal device (the PTRS port is associated with the sTRP mode) is 2, or, when the first field is used to indicate that the terminal device adopts the SFN mode and the maximum number of PTRS ports associated with the SFN mode is 2, or, when the first field is used to indicate that the terminal device adopts the sTRP mode and the maximum number of PTRS ports associated with the sTRP mode is 2, the low-order bits of the second field are used to indicate a DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field; the high-order bits of the second field are used to indicate a DMRS port associated with another PTRS port, and the DMRS port is associated with the fourth field.

[0103] Optionally, in the above-mentioned method 2 or method 3, the maximum number of PTRS ports associated with the SDM mode can be indicated by the fifth information, such as the terminal device can receive the fifth information. In the above-mentioned method 4, method 5 or method 6, the maximum number of PTRS ports associated with the SFN mode can be indicated by the sixth information, such as the terminal device can receive the sixth information; the maximum number of PTRS ports associated with the sTRP mode can be indicated by the seventh information, such as the terminal device can receive the seventh information. Among them, the fifth information, the sixth information or the seventh information can be carried in the high-level signaling. Optionally, one or more of the fifth information, the sixth information and the seventh information can be carried in the same high-level signaling or different high-level signaling. Optionally, one or more of the fifth information, the sixth information and the seventh information can also be carried in the same high-level signaling or different high-level signaling with the first information, which is not limited here.

[0104] Optionally, for any one of the above-mentioned methods 1 to 6, the second field may be, for example, 2 bits.

[0105] It should be pointed out that in the present application, the association relationship between the PTRS port and the DMRS port can refer to the provisions of the protocol or standard of the communication technology, and is not limited here. In addition, the PTRS port used by the terminal device mentioned in the present application may refer to the PTRS port actually used by the terminal device, and the maximum number of PTRS ports associated with a certain mode (such as SDM mode, SFN mode or sTRP mode, etc.) refers to the maximum number of PTRS ports configured by the network device. Optionally, the number of PTRS ports used by the terminal device may be less than or equal to the maximum number of PTRS ports configured by the network device. For example, the maximum number of PTRS ports configured by the network device (the PTRS port is associated with the sTRP mode) is 2, and the number of PTRS ports used by the terminal device can be 1 or 2. For another example, the maximum number of PTRS ports configured by the network device (the PTRS port is associated with the SDM mode) is 2, and the number of PTRS ports used by the terminal device can be 2.

[0106] Optionally, when the maximum number of streams associated with the second transmission mode is greater than, equal to, or less than 2, the third field is 0 bits.

[0107] The maximum number of streams associated with the second transmission mode is indicated by the third information. For example, the terminal device can receive the third information. Optionally, the third information can be a maximum rank (maxrank). In a possible implementation, the third information can be carried in a high-level signaling. It can also be understood that the high-level signaling configures the maxrank so that the terminal device can know the maximum number of streams associated with the second transmission mode.

[0108] In one possible implementation, when the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the second field is 0 bits. That is, the first information indicates the SDM mode or the SFN mode, and the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, and the second field is 0 bits. That is, when the high-level signaling configures multipanelscheme, and the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the second field is 0 bits. In another possible implementation, when the maximum number of streams associated with the first transmission mode is greater than 1 or the maximum number of streams associated with the second transmission mode is greater than 1, the second field is greater than 0 bits. Wherein, when the maximum number of streams associated with the first transmission mode is greater than 1, the maximum number of streams associated with the second transmission mode may be greater than or equal to 1. Similarly, when the maximum number of streams associated with the second transmission mode is greater than 1, the maximum number of streams associated with the first transmission mode may be greater than or equal to 1.

[0109] Among them, the maximum number of streams associated with the first transmission mode is indicated by the fourth information. For example, the terminal device can receive the fourth information. Optionally, the first transmission mode is the SDM mode, and the fourth information can be the maximum rank_spatial multiplexing (maxrank_SDM); the first transmission mode is the SFN mode, and the fourth information can be the maximum rank_single frequency network (maxrank_SFN). In a possible implementation, the fourth information can be carried in high-level signaling. It can also be understood that the high-level signaling configures maxrank_SDM, so that the terminal device can know the maximum number of streams associated with the SDM mode. The high-level signaling configures maxrank_SFN, so that the terminal device can know the maximum number of streams associated with the SFN mode.

[0110] The second field is greater than 0 bits, which can also be understood as: the second field is 1 bit or 2 bits.

[0111] Optionally, one or more of the first information, the third information and the fourth information may be carried in the same high-level signaling or in different high-level signaling, which is not limited here.

[0112] Optionally, when the high-level signaling does not configure multipanelscheme, the PTRS-DMRS field included in the second information can be divided into two cases, specifically:

[0113] 1. The first field (the first field is the channel sounding reference signal resource set indication field) exists, and the high-level signaling also configures the maximum number of streams associated with the second transmission mode (the second transmission mode is the sTRP mode), and the maximum number of streams associated with the second transmission mode is greater than 2. The second information also includes a second field and a third field, and the third field is 2 bits. In this case, the second field is used to indicate a DMRS port associated with a PTRS port, and the DMRS port is associated with the fourth field (the fourth field is the SRI field or the TPMI field). The third field is used to indicate a DMRS port associated with another PTRS port, and the DMRS port is associated with the fifth field (the fifth field is the second SRI field or the second TPMI field).

[0114] 2. The value of the first field is 10 or 11, and the maximum number of streams associated with the second transmission mode is equal to 2, and the second information also includes the second field, and does not include the third field. In this case, the high-order bit of the second field is used to indicate the DMRS port associated with the PTRS port, and the DMRS port is associated with the fourth field. The low-order bit of the second field is used to indicate the DMRS port associated with the PTRS port, and the DMRS port is associated with the fifth field.

[0115] Optionally, the method further includes: the terminal device sends capability information, and the capability information is used to indicate that the terminal device supports fully coherent uplink transmission. In this case, the number of PTRS ports associated with the SDM mode can be greater than or equal to 2. In other words, the number of PTRS ports associated with the predefined or preconfigured SDM mode is greater than or equal to 2. The capability information can be carried in RRC signaling.

[0116] It should be pointed out that the predefined mentioned in this application refers to the predefined information of the protocol, and the preconfigured information mentioned in this application refers to the information recorded in the hardware and / or software in the terminal device or network device.

[0117] It can be seen that in the above implementation, when the first information is used to indicate the SDM mode or the SFN mode, the second information may include two PTRS-DMRS fields, one of which is 0 bits. In this way, redundant bits of DCI can be avoided, thereby reducing the bit overhead of DCI. In addition, the first field in the second information also clearly indicates which transmission mode the terminal device specifically adopts.

[0118] The above mainly introduces the solution provided by the present application from the perspective of interaction between various devices. It is understandable that in order to realize the above functions, the above-mentioned implementation devices include hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

[0119] The embodiment of the present application can divide the terminal device or network device into functional modules according to the above method example. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0120] See also Figure 3 , Figure 3 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. The communication device 300 can be applied to the above Figure 2 In the method shown in the embodiment, Figure 3 As shown, the communication device 300 includes: a processing module 301 and a transceiver module 302. The processing module 301 can be one or more processors, and the transceiver module 302 can be a transceiver or a communication interface. The communication device can be used to implement the terminal device or network device involved in any of the above method embodiments, or to implement the function of the network element involved in any of the above method embodiments. The network element or network function can be a network element in a hardware device, a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform). Optionally, the communication device 300 can also include a storage module 303 for storing program code and data of the communication device 300.

[0121] In one example, when the communication device is used as a terminal device or a chip used in a terminal device, the steps performed by the terminal device in the above method embodiment are performed. The transceiver module 302 is used to specifically perform Figure 2The sending and / or receiving actions performed by the terminal device in the embodiment, for example, support the terminal device to perform other processes of the technology described herein. The processing module 301 can be used to support the communication device 300 to perform the processing actions in the above method embodiment, for example, support the terminal device to perform other processes of the technology described herein.

[0122] Exemplarily, the transceiver module 302 is used to: receive first information, the first information is used to indicate a first transmission mode, the first transmission mode includes an SDM mode or an SFN mode; receive second information, the second information includes a first field, the first field is used to indicate that the terminal device adopts the first transmission mode or the second transmission mode, and the second transmission mode is an sTRP mode; wherein the second information also includes a second field and a third field, the second field is a PTRS-DMRS field, the third field is a second PTRS-DMRS field, and the third field is 0 bits.

[0123] Optionally, the second field is used to indicate at least one DMRS port associated with at least one PTRS port.

[0124] Optionally, the transceiver module 302 is further used to receive third information, where the third information is used to indicate the maximum number of streams associated with the second transmission mode; wherein, when the maximum number of streams associated with the second transmission mode is greater than 2, the third field is 0 bits.

[0125] Optionally, the transceiver module 302 is further used to send capability information, where the capability information is used to indicate that the terminal device supports fully coherent uplink transmission; the number of PTRS ports associated with the SDM mode is greater than or equal to 2.

[0126] Optionally, the transceiver module 302 is further used to receive fourth information, where the fourth information is used to indicate the maximum number of streams associated with the first transmission mode; wherein, when the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the second field is 0 bits.

[0127] In another example, when the communication device is used as a network device or a chip used in a network device, the communication device executes the steps performed by the network device in the above method embodiment. The transceiver module 302 is used to specifically execute Figure 2 The sending and / or receiving actions performed by the network device in the embodiment, for example, support the network device to perform other processes of the technology described herein. The processing module 301 can be used to support the communication device 300 to perform the processing actions in the above method embodiment, for example, support the network device to perform other processes of the technology described herein.

[0128] Exemplarily, the transceiver module 302 is used to: send first information, the first information is used to indicate a first transmission mode, the first transmission mode includes an SDM mode or an SFN mode; send second information, the second information includes a first field, the first field is used to indicate that the terminal device adopts the first transmission mode or the second transmission mode, and the second transmission mode is an sTRP mode; wherein the second information also includes a second field and a third field, the second field is a PTRS-DMRS field, the third field is a second PTRS-DMRS field, and the third field is 0 bits.

[0129] Optionally, the second field is used to indicate at least one DMRS port associated with at least one PTRS port.

[0130] Optionally, the transceiver module 302 is further used to send third information, where the third information is used to indicate the maximum number of streams associated with the second transmission mode; wherein, when the maximum number of streams associated with the second transmission mode is greater than 2, the third field is 0 bits.

[0131] Optionally, the transceiver module 302 is further used to send capability information, where the capability information is used to indicate that the terminal device supports fully coherent uplink transmission; the number of PTRS ports associated with the SDM mode is greater than or equal to 2.

[0132] Optionally, the transceiver module 302 is also used to send fourth information, where the fourth information is used to indicate the maximum number of streams associated with the first transmission mode; wherein, when the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the second field is 0 bits.

[0133] In a possible implementation, when the terminal device or network device is a chip, the transceiver module 302 may be a communication interface, a pin or a circuit, etc. The communication interface may be used to input data to be processed to the processor, and may output the processing result of the processor to the outside. In a specific implementation, the communication interface may be a general purpose input output (GPIO) interface, which may be connected to multiple peripheral devices (such as a display (LCD), a camera (camara), a radio frequency (RF) module, an antenna, etc.). The communication interface is connected to the processor via a bus.

[0134] The processing module 301 may be a processor that can execute computer-executable instructions stored in the storage module to enable the chip to execute Figure 2The method involved in the illustrated embodiment. Further, the processor may include a controller, an operator and a register. Exemplarily, the controller is mainly responsible for instruction decoding and sends a control signal for the operation corresponding to the instruction. The operator is mainly responsible for performing fixed-point or floating-point arithmetic operations, shift operations, and logical operations, etc., and may also perform address operations and conversions. The register is mainly responsible for saving register operands and intermediate operation results temporarily stored during the execution of instructions. In a specific implementation, the hardware architecture of the processor may be an ASIC architecture, a microprocessor without interlocked piped stages architecture (MIPS) architecture, an advanced RISC machines (ARM) architecture, or a second processor (NP) architecture, etc. The processor may be single-core or multi-core. The storage module may be a storage module within the chip, such as a register, a cache, etc. The storage module may also be a storage module located outside the chip, such as a ROM or other types of static storage devices, RAM, etc. that can store static information and instructions.

[0135] It should be noted that the functions corresponding to the processor and the interface can be implemented through hardware design, software design, or a combination of hardware and software, and there is no limitation here.

[0136] Figure 4 A structural diagram of another communication device provided in an embodiment of the present application. It is understandable that the communication device 410 includes necessary means such as modules, units, elements, circuits, or interfaces, which are appropriately configured together to implement the present solution. The communication device 410 can be the above-mentioned terminal device or network device, or it can be a component (such as a chip) in these devices, to implement the method described in the above-mentioned method embodiment. The communication device 410 includes one or more processors 411. The processor 411 can be a general-purpose processor or a dedicated processor, etc. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a terminal device, a network device, or a chip, etc.), execute software programs, and process data of software programs.

[0137] Optionally, in one design, the processor 411 may include a program 413 (sometimes also referred to as code or instruction), and the program 413 may be executed on the processor 411 so that the communication device 410 performs the method described in the above embodiment. In another possible design, the communication device 410 includes a circuit ( Figure 4The circuit is used to implement the functions of the terminal device or network device in the above-mentioned embodiments. Optionally, the communication device 410 may include one or more memories 412, on which a program 414 (sometimes also referred to as code or instruction) is stored, and the program 414 can be run on the processor 411, so that the communication device 410 performs the method described in the above-mentioned method embodiment.

[0138] Optionally, data may also be stored in the processor 411 and / or the memory 412. The processor and the memory may be provided separately or integrated together.

[0139] Optionally, the communication device 410 may further include a transceiver 415 and / or an antenna 416. The processor 411 may also be sometimes referred to as a processing unit, which controls the communication device (e.g., a terminal device or a network device). The transceiver 415 may also be sometimes referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., which is used to implement the transceiver function of the communication device through the antenna 416.

[0140] The embodiment of the present application also provides a communication device, the communication device includes at least one processor and a memory; wherein the memory is used to store computer programs or instructions; at least one processor is used to execute the computer programs or instructions in the memory, so that Figure 2 The method of any one of the embodiments is performed.

[0141] The embodiment of the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed, the computer executes the following Figure 2 The method of any one of the embodiments.

[0142] The present application also provides a computer program product, comprising: a computer program code, which, when executed by a computer, enables the computer to execute the following Figure 2 The method of any one of the embodiments.

[0143] The embodiment of the present application also provides a chip, the chip includes at least one processor and an interface, the processor is used to read and execute instructions stored in the memory, when the instructions are executed, the chip executes as follows Figure 2 The method of any one of the embodiments.

[0144] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present application. In addition, each network element unit in each embodiment of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software network element units.

[0145] If the above-mentioned integrated unit is implemented in the form of a software network element unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the part that essentially contributes to the technical solution of the present application, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a terminal device, a cloud server, or a network device, etc.) to perform all or part of the steps of the above-mentioned methods in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code. The above is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that: include: receiving first information, where the first information is used to indicate a first transmission mode, where the first transmission mode includes a spatial domain multiplexing (SDM) mode or a single frequency network (SFN) mode; Receive second information, where the second information includes a first field, where the first field is used to indicate that the terminal device adopts the first transmission mode or the second transmission mode, where the second transmission mode is a single transmission reception point sTRP mode; The second information also includes a second field and a third field, the second field is a PTRS phase tracking reference signal-demodulation reference signal DMRS field, the third field is a second PTRS-DMRS field, and the third field is 0 bits.

2. The method according to claim 1, characterized in that: The second field is used to indicate at least one DMRS port associated with at least one PTRS port.

3. The method according to claim 1 or 2, characterized in that: When the maximum number of streams associated with the second transmission mode is greater than 2, the third field is 0 bits; The maximum number of streams associated with the second transmission mode is indicated by third information.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Sending capability information, where the capability information is used to indicate that the terminal device supports fully coherent uplink transmission; The number of PTRS ports associated with the SDM mode is greater than or equal to 2.

5. The method according to any one of claims 1 to 4, characterized in that: When the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the second field is 0 bits; The maximum number of streams associated with the first transmission mode is indicated by fourth information, and the maximum number of streams associated with the second transmission mode is indicated by third information.

6. The method according to any one of claims 1 to 4, characterized in that: When the maximum number of streams associated with the first transmission mode is greater than 1 or the maximum number of streams associated with the second transmission mode is greater than 1, the second field is greater than 0 bits; The maximum number of streams associated with the first transmission mode is indicated by fourth information, and the maximum number of streams associated with the second transmission mode is indicated by third information.

7. A communication method, characterized in that: include: Sending first information, where the first information is used to indicate a first transmission mode, where the first transmission mode includes a spatial domain multiplexing (SDM) mode or a single frequency network (SFN) mode; Sending second information, where the second information includes a first field, where the first field is used to indicate that the terminal device adopts the first transmission mode or the second transmission mode, where the second transmission mode is a single transmission reception point sTRP mode; The second information further includes a second field and a third field, the second field is a PTRS-DMRS field, the third field is a second PTRS-DMRS field, and the third field is 0 bits.

8. The method according to claim 7, characterized in that The second field is used to indicate at least one demodulation reference signal DMRS port associated with at least one phase tracking reference signal PTRS port.

9. The method according to claim 7 or 8, characterized in that: When the maximum number of streams associated with the second transmission mode is greater than 2, the third field is 0 bits; The maximum number of streams associated with the second transmission mode is indicated by third information.

10. The method according to any one of claims 7 to 9, characterized in that: The method further comprises: Sending capability information, where the capability information is used to indicate that the terminal device supports fully coherent uplink transmission; The number of PTRS ports associated with the SDM mode is greater than or equal to 2.

11. The method according to any one of claims 7 to 10, characterized in that: When the maximum number of streams associated with the first transmission mode and the maximum number of streams associated with the second transmission mode are both equal to 1, the second field is 0 bits; The maximum number of streams associated with the first transmission mode is indicated by fourth information, and the maximum number of streams associated with the second transmission mode is indicated by third information.

12. The method according to any one of claims 7 to 10, characterized in that: When the maximum number of streams associated with the first transmission mode is greater than 1 or the maximum number of streams associated with the second transmission mode is greater than 1, the second field is greater than 0 bits; The maximum number of streams associated with the first transmission mode is indicated by fourth information, and the maximum number of streams associated with the second transmission mode is indicated by third information.

13. A communication device, characterized in that: The method comprises a unit or a module for implementing the method according to any one of claims 1 to 12.

14. A communication device, characterized in that: The communication device includes at least one processor and a memory; wherein the memory is used to store computer programs or instructions; and the at least one processor is used to execute the computer program or instructions in the memory, so that the method described in any one of claims 1 to 12 is executed.

15. A communication system, characterized in that: The communication system includes terminal equipment and network equipment; The terminal device is used to perform the method according to any one of claims 1 to 6; The network device is configured to execute the method according to any one of claims 7 to 12.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, which, when executed, cause the computer to perform the method according to any one of claims 1 to 12.

17. A computer program product, characterized in that The computer program product comprises: a computer program code, and when the computer program code is executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 12.

18. A chip, characterized in that: The chip includes at least one processor and an interface, wherein the processor is used to read and execute instructions stored in a memory, and when the instructions are executed, the chip executes the method according to any one of claims 1 to 12.

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