Communication method and apparatus, storage medium, and program product

Abstract

A communication method and apparatus, a storage medium, and a program product. The method is applicable to a base station, and comprises: receiving a first sounding reference signal; on the basis of the first sounding reference signal, sending uplink transmission configuration information to a terminal; receiving a second sounding reference signal; and on the basis of the second sounding reference signal, sending coherent transmission assistance information to the terminal.

Description

Communication methods, devices, storage media and software products

[0001] This disclosure claims priority to Chinese patent application No. 202510218393.1, filed on February 25, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of communication technology, and in particular to a communication method, apparatus, storage medium, and program product. Background Technology

[0003] With the development of communication technology, coherent codebooks have been applied to the uplink transmission of terminals. Compared with using incoherent codebooks for uplink transmission, the use of coherent codebooks by terminals can improve uplink coverage and is beneficial to uplink transmission performance. Terminals can also be called user equipment (UE). Summary of the Invention

[0004] On the one hand, a communication method is provided, which is applied to a base station, including: receiving a first detection reference signal; sending uplink transmission configuration information to a terminal based on the first detection reference signal; receiving a second detection reference signal; and sending coherent transmission auxiliary information to the terminal based on the second detection reference signal.

[0005] On the other hand, a communication method is provided, which is applied to a terminal, including: sending a first probe reference signal; receiving uplink transmission configuration information returned by a base station; sending a second probe reference signal; and receiving coherent transmission auxiliary information returned by the base station.

[0006] On another front, a communication device is provided for use in a base station. The device includes a receiving module and a transmitting module. The receiving module is used to receive a first detection reference signal. The transmitting module is used to send uplink transmission configuration information to a terminal based on the first detection reference signal. The receiving module is also used to receive a second detection reference signal. The transmitting module is used to send coherent transmission auxiliary information to the terminal based on the second detection reference signal.

[0007] On another front, a communication device is provided for use in a terminal, comprising: a transmitting module and a receiving module. The transmitting module is used to transmit a first probe reference signal. The receiving module is used to receive uplink transmission configuration information returned by a base station. The transmitting module is used to transmit a second probe reference signal. The receiving module is used to receive coherent transmission auxiliary information returned by the base station.

[0008] In another aspect, a communication device is provided, comprising: a memory and a processor. The memory and the processor are coupled. The memory is used to store a computer program. When the processor executes the computer program, it implements the aforementioned communication method.

[0009] In another aspect, a computer-readable storage medium is provided, on which computer program instructions are stored, which, when executed by a processor, implement the above-described communication method.

[0010] On the other hand, a computer program product is provided, which includes computer program instructions that, when executed, implement the above-described communication method. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.

[0012] Figure 1 is a flowchart of a codebook-based uplink precoding transmission according to some embodiments of the present disclosure.

[0013] Figure 2 is a schematic diagram of a communication system according to some embodiments of the present disclosure.

[0014] Figure 3 is a flowchart illustrating a communication method according to some embodiments of the present disclosure.

[0015] Figure 4 is a flowchart illustrating another communication method according to some embodiments of the present disclosure.

[0016] Figure 5 is a flowchart of a terminal capability reporting method according to some embodiments of the present disclosure.

[0017] Figure 6 is a flowchart illustrating how a UE-specific DCI indicates inter-antenna phase difference information to a terminal according to some embodiments of the present disclosure.

[0018] Figure 7 is a flowchart illustrating how a UE-specific DCI instructs a terminal to TPMI according to some embodiments of the present disclosure.

[0019] Figure 8 is a flowchart illustrating another communication method according to some embodiments of the present disclosure.

[0020] Figure 9 is a flowchart illustrating another communication method according to some embodiments of the present disclosure.

[0021] Figure 10 is a flowchart illustrating another communication method according to some embodiments of the present disclosure.

[0022] Figure 11 is a flowchart illustrating another communication method according to some embodiments of the present disclosure.

[0023] Figure 12 is a block diagram of a communication device according to some embodiments of the present disclosure.

[0024] Figure 13 is a block diagram of another communication device according to some embodiments of the present disclosure.

[0025] Figure 14 is a block diagram of another communication device according to some embodiments of the present disclosure. Detailed Implementation

[0026] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0027] It should be noted that, in this disclosure, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0028] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0029] In the description of this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more items, and "multiple" means two or more items.

[0030] While coherent codebooks have been incorporated into transmission protocols in related technologies, in actual products, commercial terminals, due to their physical limitations, cannot meet the coherent transmission requirements of radio access network 4 (RAN4). Consequently, commercial terminals primarily use incoherent codebook transmission for uplink. Compared to coherent codebooks, incoherent codebook transmission incurs performance losses in many scenarios, especially for remote terminals. Considering future communication networks, such as 6G, which uses the 6GHz Upper Band (U6G) as its operating frequency band, the U6G band has higher frequency points and greater path loss compared to basic frequency bands like 3.5G or 2.6G. This affects uplink coverage. Using coherent transmission could improve uplink coverage and enhance uplink performance.

[0031] Currently, measured data shows that the test terminals have met the conditions for coherent transmission, while commercial terminals, limited by cost and physical size, struggle to meet these conditions. The phase difference between antennas in commercial terminals exhibits abrupt changes over time, which can be caused by various factors, with uplink / downlink switching being one possible cause. Therefore, it is possible to utilize the next-generation node B (gNB) in the 5G network to measure and indicate phase information based on the channel sounding reference signal (SRS). Considering real-time performance, the phase information can be promptly notified to the terminal after SRS measurement. When the terminal transmits data via the physical uplink shared channel (PSUCH), it can switch the transmission precoding matrix indicator (TPMI) or compensate for the phase jump, thereby achieving uplink coherent transmission.

[0032] The following section introduces the relevant aspects of codebook-based uplink transmission: The basic principle of codebook-based uplink transmission is that the network determines the number of uplink transmission layers and its corresponding precoding matrix (i.e., TPMI). To select an appropriate number of layers and precoding matrix, the network measures the SRS transmitted by the terminal to probe the wireless channel from the terminal's antenna port to the base station's receiving antenna. Based on the probe results, the network further obtains the appropriate number of layers and precoding matrix for subsequent uplink transmission.

[0033] For example, as shown in FIG1, a flowchart of an uplink precoding transmission based on a codebook according to an embodiment of the present disclosure is presented below. The specific steps are described below:

[0034] S1. The terminal (i.e., UE) reports capability information such as the number of antenna ports and coherence relationships to the base station.

[0035] S2. The base station configures the SRS resource set and SRS resources based on the capability information reported by the terminal.

[0036] In this context, an SRS resource set refers to a collection of SRS resources, which can be viewed as a functional unit. All SRS resources within an SRS resource set have a unique and identical function. They can serve as a reference for codebook-based or non-codebook-based uplink precoding transmissions, or for beam management or antenna switching. SRS resources represent the time-frequency location of an SRS within the transmission resource grid. For example, a base station might configure itself to send a reference SRS resource set for codebook-based uplink transmission to the UE, where the SRS resource set contains two SRS resources. Then, the base station instructs the terminal to use one of the SRS resources in the SRS resource set as a reference port for transmitting Physical Uplink Shared Channel (PUSCH) data. That is, the terminal uses the same antenna port as the indicated SRS resource to transmit PUSCH data.

[0037] S3. The terminal sends SRS resources to the base station according to the SRS resource set indicated by the base station, which is used by the base station to perform uplink channel estimation.

[0038] S4. Based on the uplink channel estimation results and the capability information reported by the terminal in step S1, the base station calculates and selects appropriate resource indicators (SRI), transmission layers and their precoding matrices for subsequent uplink transmission, and indicates the SRI, transmission layers and their precoding matrices through downlink control information (DCI).

[0039] S5. The terminal receives the indication signaling (DCI) sent by the base station to learn the SRI, transmission layer number, precoding matrix, and beam direction corresponding to the SRS resources for uplink transmission, and then performs subsequent codebook-based uplink precoding transmission. For example, the terminal uses the precoding matrix indicated by the DCI to precode PUSCH data and transmits the processed PUSCH data to the base station.

[0040] As described above, related technologies support TPMI codebooks for coherent transmission. During uplink codebook coherent transmission, the base station can estimate the uplink channel based on the SRS of the previous time step (e.g., one or more frames), calculate and select the TPMI, and indicate it to the terminal. However, when the terminal receives the TPMI indicated by the base station, uplink / downlink handover has already occurred, and the terminal's antenna phase may have changed. Therefore, the TPMI indicated by the base station may be incorrect, thus affecting the performance of coherent transmission. There are two main approaches to solving this problem in related technologies: one is through cyclic delay diversity (CDD), which does not require phase indication; the other is for the base station to indicate a compensating phase or TPMI to enable coherent transmission.

[0041] To address the issue of inaccurate TPMI indication caused by uplink / downlink handover, this disclosure provides a communication method. First, it adds terminal capability information assisted by a base station. When the terminal supports fully coherent or partially coherent transmission with base station assistance, on other carrier components (CC), UE-specific downlink control information (DCI) or inter-antenna phase difference information is used to indicate TPMI or inter-antenna phase difference, or group common downlink control information (DCI) is used to indicate TPMI or inter-antenna phase difference. This obtains accurate TPMI or inter-antenna phase difference, enabling the terminal to switch TPMI or compensate for phase hopping during uplink transmission. This achieves the goal of coherent uplink transmission, thereby improving uplink coverage and transmission performance.

[0042] As exemplarily shown in FIG2, which is a schematic diagram of a communication system according to an embodiment of the present disclosure, the communication system may include: a base station 101 and a terminal 102. There may be one or more base stations 101 and terminals 102, and the number is not limited.

[0043] The base station 101 is used to receive a first detection reference signal from the terminal 102, send uplink transmission configuration information to the terminal 102 based on the first detection reference signal, receive a second detection reference signal from the terminal 102, and send coherent transmission auxiliary information to the terminal 102 based on the second detection reference signal, so that the terminal 102 performs uplink transmission according to the coherent transmission auxiliary information to achieve the purpose of uplink coherent transmission.

[0044] Terminal 102 is used to send a first probe reference signal to base station 101, receive uplink transmission configuration information returned by base station 101, send a second probe reference signal to base station 101, and receive coherent transmission auxiliary information returned by base station 101, so that terminal 102 performs uplink transmission according to coherent transmission auxiliary information to achieve the purpose of uplink coherent transmission.

[0045] In this embodiment of the disclosure, base station 101 can be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTEA), or an evolved Node B (eNB or eNodeB), a base station device (gNB) in a 5G network, or a base station in a future communication system, etc. Base stations can include various network-side devices such as macro base stations, micro base stations, femtocell base stations, wireless remote extensions, reconfigurable intelligent surfaces (RISS), routers, relay stations, transmission and reception points (TRPs), receivers, access points, and wireless fidelity (WIFI) devices. A base station can sometimes also be referred to as a reader / writer for communicating with terminals; this embodiment of the disclosure does not limit this usage.

[0046] Terminal 102 can be a device with wireless transceiver capabilities. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, virtual reality (VR) terminals, augmented reality (AR) terminals, wireless terminals in industrial control, wireless terminals in self-driving vehicles, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc. The embodiments of this disclosure do not limit the application scenarios. Terminals may also be referred to as users, user equipment, Ambient Internet of Things (A-IoT) devices, access terminals, UE units, UE stations, mobile stations, mobile stations, remote stations, transmitters, remote terminals, mobile devices, UE terminals, wireless communication devices, UE agents, or UE devices, etc., and the embodiments of this disclosure do not limit these terms.

[0047] It should be noted that Figure 2 is only an exemplary framework diagram, and the number of devices included in Figure 2 and the names of each device are not limited.

[0048] The application scenarios of the embodiments disclosed herein are not limited. The system architecture and business scenarios described in the embodiments of this disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this disclosure are also applicable to similar technical problems.

[0049] Figure 3 shows a flowchart of a communication method. As shown in Figure 3, this communication method is applied to a base station and includes S201-S204:

[0050] S201, Receive the first detection reference signal.

[0051] In other words, in the i-th frame, the terminal can send an SRS (i.e., the first sounding reference signal in this disclosure) to the base station, where i is greater than 0. Correspondingly, the base station receives the SRS. The SRS can be used to obtain the channel state information (CSI) required for the codebook-based uplink transmission scheme.

[0052] S202. Based on the first detection reference signal, send uplink transmission configuration information to the terminal.

[0053] In other words, from frame i+1 to frame i+n, the base station can perform uplink channel detection based on the SRS sent by the terminal, schedule resources for the terminal, and determine the uplink transmission configuration information. Furthermore, the base station can send downlink control information (DCI) carrying the uplink transmission configuration information to the terminal, where n is greater than or equal to 1.

[0054] Where n can be the minimum number of frames required for the terminal to perform uplink / downlink handover, or the number of frames corresponding to the minimum period for the terminal to send SRS.

[0055] The uplink transmission configuration information can be used for uplink transmission between the terminal and the base station, that is, for the terminal to send PUSCH data to the base station.

[0056] For details on uplink configuration information, please refer to the following examples, which will not be repeated here.

[0057] S203, Receive the second detection reference signal.

[0058] In other words, in the (i+n)th frame, the terminal sends the SRS (i.e., the second detection reference signal in this disclosure) to the base station again. Correspondingly, the base station receives the SRS.

[0059] The SRS can be sent periodically, semi-continuously, or aperiodically. If the SRS period is relatively long and no SRS has been sent in the (i+n)th frame, an aperiodic SRS can be triggered to ensure that the base station can obtain coherent transmission assistance information.

[0060] S204. Based on the second detection reference signal, send coherent transmission auxiliary information to the terminal.

[0061] In other words, the base station can obtain coherent transmission assistance information based on the retransmitted SRS and send DCI carrying the coherent transmission assistance information to the terminal.

[0062] In other words, in related technologies, after the base station receives the probe reference signal for the first time, the uplink transmission configuration information returned to the terminal includes the inter-antenna phase difference information of the terminal. However, when the terminal receives this uplink configuration information, it performs an uplink / downlink handover. This switch from downlink to uplink transmission may cause a jump in the antenna phase. Therefore, the inter-antenna phase difference information obtained by the terminal at this time is inaccurate. By receiving the probe reference signal again and receiving coherent transmission assistance information including antenna phase-related information, the latest antenna phase-related information can be obtained in a timely manner after the first returned uplink transmission configuration information and before the terminal performs uplink transmission, thus assisting the terminal in performing coherent transmission. This achieves the goal of the base station assisting the terminal in obtaining accurate antenna phase-related information to achieve uplink coherent transmission.

[0063] In some embodiments, the uplink transmission configuration information includes at least one of the following: resource allocation information for the physical uplink shared channel, modulation and coding scheme (MCS), transmission precoding matrix indication information, and resource indication of the first probe reference signal.

[0064] In other words, the uplink transmission configuration information can be used by the subsequent terminal to pre-encode and send PUSCH data.

[0065] In some embodiments, the antenna port that transmits the second probe reference signal is the same as the antenna port corresponding to the resource indication of the first probe reference signal in the uplink transmission configuration information.

[0066] In other words, after the terminal sends the first probe reference signal, the antenna port corresponding to the resource indication of the first probe reference signal can be obtained from the uplink transmission configuration information returned by the base station. This antenna port corresponding to the resource indication of the first probe reference signal is then used as the antenna port for the terminal to send the second probe reference signal, eliminating the need to select the antenna port from all of the terminal's antenna ports, thus improving data transmission efficiency.

[0067] Figure 4 shows a flowchart of another communication method. As shown in Figure 4, before step S201 above, the method further includes step S301:

[0068] S301. Receive terminal capability information from the terminal.

[0069] Among them, terminal capability information is used to characterize whether the terminal has coherent transmission capability.

[0070] In other words, the terminal can send terminal capability information to the base station. The base station can then determine whether the terminal possesses coherent transmission capabilities based on this information, and consequently decide which transmission mode to employ. For example, if the base station determines that the terminal possesses fully coherent transmission capabilities with base station assistance, it can decide to execute coherent transmission with base station assistance.

[0071] For example, as shown in Figure 5, a flowchart of a terminal capability reporting method provided in this disclosure is presented, and the specific steps are as follows:

[0072] S1. After the base station establishes a radio resource control (RRC) connection with the UE, the base station sends a UE capability enquiry signaling to the terminal.

[0073] S2. After receiving the terminal capability query signaling, the UE immediately reports the terminal capability information.

[0074] Related technologies define three types of coherent transmission capabilities for terminals: fully coherent transmission capability, partially coherent transmission capability, and incoherent transmission capability. Fully coherent transmission capability means that all antennas of the terminal can transmit coherently. Partially coherent transmission capability means that antennas within the same coherent transmission group of the terminal can transmit coherently, but different coherent transmission groups cannot transmit coherently; each coherent transmission group contains two antennas. Incoherent transmission capability means that the terminal has no antennas capable of coherent transmission.

[0075] However, most terminals only support non-coherent transmission capabilities. If the base station could assist the terminal in performing fully coherent or partially coherent transmission, then these base stations could achieve coherent transmission. Currently, base stations cannot acquire these capabilities. This disclosure provides two methods to enable the base station to acquire the terminal's transmission capabilities with base station assistance. The following embodiments describe the first method.

[0076] In some embodiments, the terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, having full coherent transmission capability with base station assistance, having partial coherent transmission capability with base station assistance, and having non-coherent transmission capability with base station assistance.

[0077] In other words, the terminal currently only has three coherent transmission capabilities: fully coherent transmission, partially coherent transmission, and non-coherent transmission. Considering that base station-assisted coherent transmission is an additional capability, three new coherent transmission capabilities are added: base station-assisted fully coherent transmission, base station-assisted partially coherent transmission, and base station-assisted non-coherent transmission. This allows the base station to execute the appropriate transmission mode based on the terminal's reported capability information, such as fully coherent transmission, partially coherent transmission, non-coherent transmission, base station-assisted fully coherent transmission, or base station-assisted partially coherent transmission. For example, when the terminal reports that it has base station-assisted fully coherent transmission capability, the base station will execute base station-assisted fully coherent transmission.

[0078] The following examples illustrate the second approach.

[0079] In some embodiments, the terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, and whether it supports coherent transmission capability assisted by a base station.

[0080] In other words, it's possible to add terminal capabilities that support base station assistance. When a terminal reports its coherent transmission capabilities (i.e., fully coherent, partially coherent, or non-coherent transmission capabilities), it also reports whether it supports base station-assisted coherent transmission capabilities. This allows the base station to execute the appropriate transmission mode based on the terminal capability information reported by the terminal, such as fully coherent transmission, partially coherent transmission, non-coherent transmission, fully coherent transmission with base station assistance, or partially coherent transmission with base station assistance. For example, when the terminal reports fully coherent transmission capability with base station assistance, the base station executes fully coherent transmission with base station assistance.

[0081] The newly added terminal capability in the above two methods is a physical layer terminal capability, which can be classified as a wireless capability.

[0082] For example, when the terminal reports terminal capability information to the base station instructing the base station to perform base station-assisted coherent transmission, the methods in S201-S204 above can be executed to avoid the failure of the methods in S201-S204 above when the terminal does not support base station-assisted coherent transmission.

[0083] In some embodiments, the coherent transmission auxiliary information includes at least one of the following: inter-antenna phase difference information, inter-antenna phase difference indication information, and transmission precoding matrix indication information.

[0084] In other words, coherent transmission auxiliary information can be used to instruct terminal compensation information, namely at least one of antenna phase-related information such as inter-antenna phase difference information, inter-antenna phase difference indication information, and transmission precoding matrix indication information, to achieve uplink coherent transmission. Terminal compensation information can also be called phase compensation information.

[0085] In some embodiments, downlink control information carrying coherent transmission auxiliary information is located on a first carrier component, which is a carrier component other than the carrier component of the currently transmitted data.

[0086] In other words, when the base station sends downlink control information carrying coherent transmission assistance information to the terminal, the terminal's transmission mode has already switched to uplink transmission. However, the base station sending downlink control information carrying coherent transmission assistance information to the terminal is downlink transmission. Therefore, transmitting downlink control information carrying coherent transmission assistance information on the carrier component of the currently transmitted data would cause uplink-downlink conflicts. Thus, it is necessary to transmit downlink control information carrying coherent transmission assistance information on carrier components other than the carrier component of the currently transmitted data.

[0087] In some embodiments, coherent transmission auxiliary information is carried in at least one of the following: UE-specific DCI and group common DCI.

[0088] In other words, base stations can transmit coherent transmission auxiliary information using two methods: UE-specific DCI and group common DCI. The following section describes the method of transmitting coherent transmission auxiliary information using UE-specific DCI, with a detailed flowchart.

[0089] For example, if the base station learns from the terminal capability information reported by the terminal that the terminal has the capability for coherent transmission after base station assistance, that is, if the terminal wants the base station to indicate the terminal's compensation information, then the base station can use UE-specific DCI to indicate the terminal compensation information to the terminal. In this case, the terminal compensation information can be inter-antenna phase difference information or TPMI.

[0090] For example, as shown in FIG6, a flowchart of an embodiment of the present disclosure is provided, which uses UE-specific DCI to indicate inter-antenna phase difference information to a terminal. The specific steps are as follows:

[0091] S1. In the i-th frame, the terminal sends an SRS to the base station.

[0092] S2. In frames i+1 to i+n, the base station performs uplink channel estimation based on the SRS sent by the terminal, and determines the SRS resources, uplink transmission layer number and TPMI for uplink transmission. Furthermore, based on the TPMI and channel information, it determines the MCS level for uplink transmission.

[0093] S3. The base station notifies the terminal of PUSCH resource allocation, corresponding MCS, TPMI, and corresponding SRI information via DCI. In frames i+1 to i+n-1, the terminal sends PUSCH according to the scheduling information of this DCI.

[0094] S4. In the i+n frame, the terminal sends the SRS to the base station again.

[0095] S5. The base station estimates the phase difference between antennas based on the SRS and obtains the phase difference between antennas.

[0096] For an SRS resource configured with N antenna ports, a maximum of N-1 phase differences need to be indicated, meaning that two adjacent antenna ports correspond to one inter-antenna phase difference. This can be indicated using X bits, where X is at least N-1 bits. For example, assuming N is 3, representing antenna ports 1, 2, and 3, with antenna port 1 having a phase of 180°, antenna port 2 having a phase of 0°, and antenna port 3 having a phase of 0°, then the two phase differences that need to be indicated are the 0° inter-antenna phase difference between antenna ports 1 and 2, and the 180° inter-antenna phase difference between antenna ports 2 and 3.

[0097] S6. For each terminal, send X bits of uplink scheduling DCI using a CC different from the current terminal's transmitted data (i.e., another CC). The uplink scheduling DCI is a DCI used for uplink scheduling. Compared with the normally used DCI, the uplink scheduling DCI contains an additional phase compensation information.

[0098] S7. The terminal modulates the PUSCH data according to the MCS indicated by the base station, and uses the inter-antenna phase difference information and TPMI indicated by SRI and DCI to determine the precoding matrix and transmission layer number for PUSCH data transmission. Further, the PUSCH data is precoded according to the precoding matrix and transmission layer number.

[0099] S8. The terminal sends PUSCH data to the base station.

[0100] For example, as shown in FIG7, a flowchart of a method for indicating TPMI to a terminal using UE-specific DCI according to an embodiment of the present disclosure is as follows:

[0101] S1. In the i-th frame, the terminal sends an SRS to the base station.

[0102] S2. In frames i+1 to i+n, the base station performs uplink channel estimation based on the SRS sent by the terminal, and determines the SRS resources, uplink transmission layer number and TPMI for uplink transmission. Furthermore, based on the TPMI and channel information, it determines the MCS level for uplink transmission.

[0103] S3. The base station notifies the terminal of PUSCH resource allocation, corresponding MCS, and corresponding SRI information via DCI. In frames i+1 to i+n-1, the terminal sends PUSCH according to the scheduling information of the DCI.

[0104] S4. In the i+n frame, the terminal sends the SRS to the base station again.

[0105] S5. The base station estimates the inter-antenna phase difference based on the SRS to obtain the MCS and SRI. Then, based on the obtained MCS and SRI, it quickly calculates the TPMI.

[0106] S6. Send X bits of uplink scheduling DCI on a CC that is different from the current terminal's transmitted data (i.e., other CCs). The uplink scheduling DCI is a DCI used for uplink scheduling. Compared with the commonly used DCI, the uplink scheduling DCI contains an additional phase compensation information.

[0107] S7. The terminal modulates the PUSCH data according to the MCS indicated by the base station, and uses SRI and TPMI to determine the precoding matrix and transmission layer number for the PUSCH data transmission. Further, the PUSCH data is precoded according to the precoding matrix and transmission layer number.

[0108] The TPMI here can also be obtained from the inter-antenna phase difference information indicated by DCI in Figure 6 and the TPMI.

[0109] S8. The terminal sends PUSCH data to the base station.

[0110] In some embodiments, user-specific downlink control information is obtained by inserting a field containing coherent transmission auxiliary information into the control information of the uplink scheduling data channel, and the size of the field is based on the RRC configuration or the default configuration.

[0111] In other words, the above-mentioned method of using UE-specific DCI to indicate inter-antenna phase difference information or TPMI to the terminal involves inserting a field into the DCI responsible for scheduling to send the inter-antenna phase difference information or TPMI along with it. The main advantage of this method is that the scheduling DCI can be reused, avoiding the need to add a new DCI and thus avoiding increasing the number of blind reductions.

[0112] In the aforementioned method of using UE-specific DCI to indicate inter-antenna phase difference information or TPMI to the terminal, since the DCI has already been sent during downlink transmission (i.e., after the terminal sends SRS to the base station for the first time, the base station will return the DCI to the terminal), sending the DCI again at this time requires zeroing out a considerable amount of information, essentially similar to a single-stage scheduling. At this point, most fields in the DCI are invalid, resulting in a significant waste of DCI capacity. Furthermore, a DCI needs to be sent to each terminal, and the DCI contains scheduling information, which significantly increases signaling overhead. To address these issues, group common DCI can be used to indicate terminal compensation information to the terminal group, reducing signaling overhead. In this case, the terminal compensation information can be inter-antenna phase difference indication information or TPMI. The following embodiments illustrate how to use group common DCI to indicate inter-antenna phase difference indication information to the terminal group.

[0113] In some embodiments, the group common downlink control information consists of multiple terminal-specific information blocks, which are received by multiple terminals that require coherent transmission auxiliary information.

[0114] In other words, multiple terminals that require coherent transmission of auxiliary information can jointly receive the same set of common downlink control information, which can reduce signaling overhead.

[0115] In some embodiments, each information block corresponds one-to-one with a terminal requiring coherent auxiliary information, and the information block contains the coherent transmission auxiliary information for the corresponding terminal. Multiple terminals requiring coherent transmission auxiliary information are configured with the same radio network temporary identity (RNTI). The RNTI is used for notification of coherent transmission auxiliary information.

[0116] In other words, terminals that require coherent transmission assistance information can find it based on their configured RNTI. Multiple terminals requiring coherent transmission assistance information can be configured with the same RNTI, making it easier for subsequent terminals to obtain the necessary information. This prevents terminals that do not require coherent transmission assistance information from also obtaining it, thus avoiding performance impact.

[0117] In some embodiments, for any terminal among multiple terminals requiring coherent transmission auxiliary information, the number of the information block corresponding to the terminal in the group common downlink control information is determined by the RRC configuration or the default configuration. The terminal obtains the content of the group common downlink control information through the radio network temporary identifier, reads the coherent transmission auxiliary information in the information block corresponding to the terminal according to the number of the information block corresponding to the terminal in the group common downlink control information, and does not read information in other information blocks.

[0118] In other words, a terminal that needs coherent transmission auxiliary information can read its own coherent transmission auxiliary information from the group common downlink control information, without reading information from other information blocks, so as to save the terminal's overhead in information reading.

[0119] The following describes the method of using group common DCI to indicate inter-antenna phase difference indication information to the terminal group, with specific steps and examples:

[0120] S1. The base station sends an RRC configuration message to each terminal in the terminal group. The RRC configuration message includes a phase indicator (PI). The phase indicator is used to configure the phase difference indication information between antennas. The phase indicator includes the associated RNTI (pi_RNTI), DCI size (dci-payload size), a phase combination list containing multiple SRS resources for adding or modifying (phaseCombToAddModList), and a phase combination list containing multiple SRS resources for releasing (phaseCombToReleaseList).

[0121] The `phaseCombToAddModList` structure contains the phase combination (`phaseCombPerSrsResource`) for each SRS resource. `phaseCombPerSrsResource` is a structure used to configure the phase combination for each SRS resource. `phaseCombPerSrsResource` contains the following fields: phase combinations and the position (`positionInDCI`) of the phase information (i.e., inter-antenna phase difference indication information). Different phase indicators can use different RNTIs, or the same RNTI, depending on the scenario. The phase combination can be inter-antenna phase difference information or TPMI.

[0122] The RRC configuration message is actually a "common container" that carries phase information from multiple terminals.

[0123] S2. The base station, as needed, indicates phase information, generates a DCI message (i.e., group common DCI), and sends the DCI message to the terminal group. This DCI message is carried on a different CC than the current data transmission.

[0124] S3. Terminals configured with pi_RNTI in the terminal group (i.e., terminals requiring coherent auxiliary information) can obtain the content of the DCI message through pi_RNTI, and read the coherent transmission auxiliary information in the corresponding information block according to the information block number in the DCI message, while ignoring the information in other information blocks. That is, terminals configured with pi_RNTI can open this "common container," and then the terminal can find its own phase information from this "common container."

[0125] For example, assuming N terminals need to transmit Coherent Transmission Auxiliary Information (DCI), this DCI message contains N blocks, each corresponding to an inter-antenna phase difference indication (TPMI). That is, the DCI contains TPMI 1, TPMI 2, ..., TPMI N. Each terminal in this terminal group is configured to correspond to one block. After receiving the DCI message, each terminal reads the TPMI or TPMI from the corresponding block according to its configured block number, ignoring information from other blocks. For example, terminal 1 reads TPMI 1 from Block 1 and ignores information from Blocks 2, ..., N. Similarly, the TPMI can be replaced by TPMI; for example, terminal 1 reads TPMI 1 from Block 1 and ignores information from Blocks 2, ..., N.

[0126] The format of DCI messages can be shown in Table 1:

[0127] Table 1

[0128] For example, when the RRC is configured to enable the terminal to perform coherent transmission with base station assistance, and the time between downlink DCI transmission and uplink PUSCH transmission meets the terminal processing time requirements, uplink coherent transmission can be achieved by using UE specific DCI indication or group common DCI indication in the above embodiments.

[0129] If the RRC configuration does not enable the terminal to perform coherent transmission with the assistance of the base station, or if the time between downlink DCI transmission and uplink PUSCH transmission does not meet the terminal's processing time requirements, the terminal does not need to receive DCI from other CCs.

[0130] Figure 8 shows a flowchart of another communication method. As shown in Figure 8, this communication method is applied to a terminal and includes S401-S404:

[0131] S401, Send the first detection reference signal.

[0132] The description of the first detection reference signal can be found in the above embodiment S201, and will not be repeated here.

[0133] S402, Receive uplink transmission configuration information returned by the base station.

[0134] For an introduction to the uplink transmission configuration information, please refer to the above embodiment S202, which will not be repeated here.

[0135] S403, Send the second detection reference signal.

[0136] The description of the second detection reference signal can be found in the above embodiment S203, and will not be repeated here.

[0137] S404. Receive coherent transmission auxiliary information returned by the base station.

[0138] For an introduction to coherent transmission auxiliary information, please refer to the above embodiment S204, which will not be repeated here.

[0139] Figure 9 shows a flowchart of another communication method. The first message includes preset switching conditions. As shown in Figure 9, before step S401 above, the method also includes S501:

[0140] S501, Send terminal capability information to the base station.

[0141] Among them, terminal capability information is used to characterize whether the terminal has coherent transmission capability.

[0142] The role of terminal capability information can be explained in the above embodiment S301, and will not be repeated here.

[0143] In some embodiments, the terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, having full coherent transmission capability with base station assistance, having partial coherent transmission capability with base station assistance, and having non-coherent transmission capability with base station assistance.

[0144] For details regarding the specific content of the terminal capability information, please refer to the above embodiments; they will not be repeated here.

[0145] In some embodiments, the terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, and whether it supports coherent transmission capability assisted by a base station.

[0146] For details regarding the specific content of the terminal capability information, please refer to the above embodiments; they will not be repeated here.

[0147] In some embodiments, the uplink transmission configuration information includes at least one of the following: resource allocation information for the physical uplink shared channel, modulation and coding scheme, transmission precoding matrix indication information, and resource indication of the first probe reference signal.

[0148] For details regarding the uplink transmission configuration information, please refer to the above embodiments; they will not be repeated here.

[0149] In some embodiments, the antenna port that transmits the second probe reference signal is the same as the antenna port corresponding to the resource indication of the first probe reference signal in the uplink transmission configuration information.

[0150] The description of the antenna port for the second detection reference signal can be found in the above embodiments and will not be repeated here.

[0151] In some embodiments, the coherent transmission auxiliary information includes at least one of the following: inter-antenna phase difference information, inter-antenna phase difference indication information, and transmission precoding matrix indication information.

[0152] For details regarding the specific content of the coherent transmission auxiliary information, please refer to the above embodiments; they will not be repeated here.

[0153] In some embodiments, coherent transmission auxiliary information is carried in at least one of the following: user-specific downlink control information and group common downlink control information.

[0154] For a description of user-specific downlink control information and group-common downlink control information, please refer to the above embodiments, which will not be repeated here.

[0155] In some embodiments, downlink control information carrying coherent transmission auxiliary information is located on a first carrier component, which is a carrier component other than the carrier component of the currently transmitted data.

[0156] The description of the carrier component carrying downlink control information can be found in the above embodiments and will not be repeated here.

[0157] In some embodiments, user-specific downlink control information is obtained by inserting a field containing coherent transmission auxiliary information into the control information of the uplink scheduling data channel, and the size of the field is based on the RRC configuration or the default configuration.

[0158] For details on user-specific downlink control information, please refer to the above embodiments; they will not be repeated here.

[0159] In some embodiments, the group common downlink control information consists of multiple terminal-specific information blocks, which are received by multiple terminals that require coherent transmission auxiliary information.

[0160] In some embodiments, an information block corresponds one-to-one with a terminal that requires coherent auxiliary information, and the information block contains the coherent transmission auxiliary information of the corresponding terminal; multiple terminals that require coherent transmission auxiliary information are all configured with the same wireless network temporary identifier; the wireless network temporary identifier is used for notification of coherent transmission auxiliary information.

[0161] The relationship between the information blocks included in the group common downlink control information and the terminal can be referred to the above embodiments, and will not be repeated here.

[0162] Figure 10 shows a flowchart of another communication method. The number of the information block corresponding to the terminal in the group common downlink control information is determined by the RRC configuration or the default configuration. As shown in Figure 10, after step S404 above, the method further includes S601:

[0163] S601. Obtain the content of the group common downlink control information through the temporary identifier of the wireless network, read the coherent transmission auxiliary information in the information block corresponding to the terminal according to the number of the information block corresponding to the terminal in the group common downlink control information, and do not read the information in other information blocks.

[0164] For an explanation of how the terminal reads the coherent transmission auxiliary information, please refer to the above embodiments; further details will not be provided here.

[0165] The following describes the communication method provided in the above embodiments, taking the interaction between the base station and the terminal as an example, as shown in Figure 11, including:

[0166] S701. The terminal sends terminal capability information to the base station. Correspondingly, the base station receives the terminal capability information from the terminal, so that the base station can determine which transmission mode to execute based on the terminal capability information.

[0167] S702, The terminal sends a first probe reference signal to the base station. Correspondingly, the base station receives the first probe reference signal from the terminal.

[0168] S703. The base station sends uplink transmission configuration information to the terminal. Correspondingly, the terminal receives the uplink transmission configuration information from the base station, enabling it to configure uplink transmission according to the information.

[0169] S704. The terminal sends a second probe reference signal to the base station. Correspondingly, the base station receives the second probe reference signal from the terminal.

[0170] S705. The base station sends coherent transmission assistance information to the terminal. Correspondingly, the terminal receives the coherent transmission assistance information from the base station, enabling it to perform coherent transmission assistance based on the uplink transmission configuration information.

[0171] It is understood that, in order to achieve the above-mentioned functions, the communication device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the algorithmic steps of the examples described in conjunction with the embodiments of this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0172] This disclosure embodiment can divide the communication device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0173] Figure 12 is a block diagram of a communication device according to an embodiment of the present disclosure. The communication device 1200 can be applied to a base station and execute the communication method shown in Figure 3 above. As shown in Figure 12, the communication device 1200 includes a receiving module 1201 and a transmitting module 1202.

[0174] The receiving module 1201 is used to receive a first probe reference signal. The transmitting module 1202 is used to send uplink transmission configuration information to the terminal based on the first probe reference signal. The receiving module 1201 is also used to receive a second probe reference signal. The transmitting module 1202 is further used to send coherent transmission auxiliary information to the terminal based on the second probe reference signal.

[0175] In some embodiments, the uplink transmission configuration information includes at least one of the following: resource allocation information for the physical uplink shared channel, modulation and coding scheme, transmission precoding matrix indication information, and resource indication of the first probe reference signal.

[0176] In some embodiments, the antenna port that transmits the second probe reference signal is the same as the antenna port corresponding to the resource indication of the first probe reference signal in the uplink transmission configuration information.

[0177] In some embodiments, the coherent transmission auxiliary information includes at least one of the following: inter-antenna phase difference information, inter-antenna phase difference indication information, and transmission precoding matrix indication information.

[0178] In some embodiments, coherent transmission auxiliary information is carried in at least one of the following: user-specific downlink control information and group common downlink control information.

[0179] In some embodiments, downlink control information carrying coherent transmission auxiliary information is located on a first carrier component, which is a carrier component other than the carrier component of the currently transmitted data.

[0180] In some embodiments, user-specific downlink control information is obtained by inserting a field containing coherent transmission auxiliary information into the control information of the uplink scheduling data channel, and the size of the field is based on the RRC configuration or the default configuration.

[0181] In some embodiments, the group common downlink control information consists of multiple terminal-specific information blocks, which are received by multiple terminals that require coherent transmission auxiliary information.

[0182] In some embodiments, an information block corresponds one-to-one with a terminal that requires coherent auxiliary information, and the information block contains the coherent transmission auxiliary information of the corresponding terminal; multiple terminals that require coherent transmission auxiliary information are all configured with the same wireless network temporary identifier; the wireless network temporary identifier is used for notification of coherent transmission auxiliary information.

[0183] In some embodiments, for any terminal among multiple terminals requiring coherent transmission auxiliary information, the number of the information block corresponding to the terminal in the group common downlink control information is determined by the RRC configuration or the default configuration; the terminal obtains the content of the group common downlink control information through the radio network temporary identifier, reads the coherent transmission auxiliary information in the information block corresponding to the terminal according to the number of the information block corresponding to the terminal in the group common downlink control information, and does not read the information in other information blocks.

[0184] In some embodiments, the receiving module 1201 is further configured to receive terminal capability information from the terminal, the terminal capability information being used to characterize whether the terminal has coherent transmission capability.

[0185] In some embodiments, the terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, having full coherent transmission capability with base station assistance, having partial coherent transmission capability with base station assistance, and having non-coherent transmission capability with base station assistance.

[0186] In some embodiments, the terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, and whether it supports base station-assisted coherent transmission capability. Figure 13 is a block diagram of another communication device provided according to an embodiment of the present disclosure. The communication device 1300 can be applied to a terminal and execute the communication method shown in Figure 8 above. As shown in Figure 13, the communication device 1300 includes: a transmitting module 1301 and a receiving module 1302.

[0187] The transmitting module 1301 is used to transmit a first probe reference signal. The receiving module 1302 is used to receive uplink transmission configuration information returned by the base station. The transmitting module 1301 is also used to transmit a second probe reference signal. The receiving module 1302 is also used to receive coherent transmission auxiliary information returned by the base station.

[0188] In some embodiments, the uplink transmission configuration information includes at least one of the following: resource allocation information for the physical uplink shared channel, modulation and coding scheme, transmission precoding matrix indication information, and resource indication of the first probe reference signal.

[0189] In some embodiments, the antenna port that transmits the second probe reference signal is the same as the antenna port corresponding to the resource indication of the first probe reference signal in the uplink transmission configuration information.

[0190] In some embodiments, the coherent transmission auxiliary information includes at least one of the following: inter-antenna phase difference information, inter-antenna phase difference indication information, and transmission precoding matrix indication information.

[0191] In some embodiments, coherent transmission auxiliary information is carried in at least one of the following: user-specific downlink control information and group common downlink control information.

[0192] In some embodiments, downlink control information carrying coherent transmission auxiliary information is located on a first carrier component, which is a carrier component other than the carrier component of the currently transmitted data.

[0193] In some embodiments, user-specific downlink control information is obtained by inserting a field containing coherent transmission auxiliary information into the control information of the uplink scheduling data channel, and the size of the field is based on the RRC configuration or the default configuration.

[0194] In some embodiments, the group common downlink control information consists of multiple terminal-specific information blocks, which are received by multiple terminals that require coherent transmission auxiliary information.

[0195] In some embodiments, an information block corresponds one-to-one with a terminal that requires coherent auxiliary information, and the information block contains the coherent transmission auxiliary information of the corresponding terminal; multiple terminals that require coherent transmission auxiliary information are all configured with the same wireless network temporary identifier; the wireless network temporary identifier is used for notification of coherent transmission auxiliary information.

[0196] In some embodiments, the communication device 1300 further includes a processing module 1303. The processing module 1303 is configured to obtain the content of the group common downlink control information through a radio network temporary identifier, read the coherent transmission auxiliary information in the information block corresponding to the terminal according to the number of the information block corresponding to the terminal in the group common downlink control information, and not read information from other information blocks.

[0197] In some embodiments, the sending module 1301 is further configured to send terminal capability information to the base station, the terminal capability information being used to characterize whether the terminal has coherent transmission capability.

[0198] In some embodiments, the terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, having full coherent transmission capability with base station assistance, having partial coherent transmission capability with base station assistance, and having non-coherent transmission capability with base station assistance.

[0199] In some embodiments, the terminal capability information includes at least one of the following: possessing full coherent transmission capability, possessing partial coherent transmission capability, possessing non-coherent transmission capability, and whether it supports base station-assisted coherent transmission capability. When the functions of the integrated modules described above are implemented in hardware, this disclosure provides another structure of the communication device involved in the above embodiments. As shown in FIG14, the communication device 1400 includes: a processor 1402 and a bus 1404. In some embodiments, the communication device may further include a memory 1401. In some embodiments, the communication device may further include a communication interface 1403.

[0200] Processor 1402 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1402 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1402 may also be a combination that implements computational functions, such as a combination of one or more microprocessors, a digital signal processor (DSP), and a microprocessor.

[0201] The communication interface 1403 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0202] The memory 1401 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0203] In some embodiments, the memory 1401 may exist independently of the processor 1402. The memory 1401 may be connected to the processor 1402 via a bus 1404 and may be used to store instructions or program code. When the processor 1402 calls and executes the instructions or program code stored in the memory 1401, it can implement the communication method provided in the embodiments of this disclosure.

[0204] In other embodiments, the memory 1401 may also be integrated with the processor 1402.

[0205] Bus 1404 can be an extended industry standard architecture (EISA) bus, etc. Bus 1404 can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in Figure 14, but this does not mean that there is only one bus or one type of bus.

[0206] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform a communication method as described in any of the above embodiments.

[0207] Exemplary examples show that the aforementioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0208] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the communication method described in any of the above embodiments.

[0209] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A communication method, wherein, Applied to a base station, the method includes: Receive the first detection reference signal; Based on the first detection reference signal, send uplink transmission configuration information to the terminal; Receive the second detection reference signal; Based on the second detection reference signal, coherent transmission auxiliary information is sent to the terminal.

2. The method according to claim 1, wherein, The uplink transmission configuration information includes at least one of the following: resource allocation information of the physical uplink shared channel, modulation and coding scheme, transmission precoding matrix indication information, and resource indication of the first probe reference signal.

3. The method according to claim 1, wherein, The antenna port that transmits the second probe reference signal is the same as the antenna port corresponding to the resource indication of the first probe reference signal in the uplink transmission configuration information.

4. The method according to claim 1, wherein, The coherent transmission auxiliary information includes at least one of the following: inter-antenna phase difference information, inter-antenna phase difference indication information, and transmission precoding matrix indication information.

5. The method according to claim 4, wherein, The coherent transmission auxiliary information is carried in at least one of the following: user-specific downlink control information and group common downlink control information.

6. The method according to claim 5, wherein, The downlink control information carrying the coherent transmission auxiliary information is located on the first carrier component, which is a carrier component other than the carrier component of the currently transmitted data.

7. The method according to claim 5, wherein, The user-specific downlink control information is obtained by inserting a field containing the coherent transmission auxiliary information into the control information of the uplink scheduling data channel. The size of the field is based on the Radio Resource Control (RRC) configuration or the default configuration.

8. The method according to claim 5, wherein, The group of common downlink control information consists of multiple terminal-specific information blocks, which are received by multiple terminals that require coherent transmission auxiliary information.

9. The method according to claim 8, wherein, The information block corresponds one-to-one with the terminal that requires coherent auxiliary information, and the information block contains the coherent transmission auxiliary information of the corresponding terminal; the multiple terminals that require coherent transmission auxiliary information are all configured with the same wireless network temporary identifier; the wireless network temporary identifier is used for notification of coherent transmission auxiliary information.

10. The method according to claim 9, wherein, For any of the multiple terminals requiring coherent transmission auxiliary information, the number of the information block corresponding to the terminal in the group of common downlink control information is determined by RRC configuration or default configuration; the terminal obtains the content of the group of common downlink control information through the radio network temporary identifier, reads the coherent transmission auxiliary information in the information block corresponding to the terminal according to the number of the information block corresponding to the terminal in the group of common downlink control information, and does not read information in other information blocks.

11. The method according to claim 1, wherein, The method further includes: The terminal capability information received from the terminal is used to characterize whether the terminal has coherent transmission capability.

12. The method according to claim 11, wherein, The terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, having full coherent transmission capability with base station assistance, having partial coherent transmission capability with base station assistance, and having non-coherent transmission capability with base station assistance.

13. The method according to claim 11, wherein, The terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, and whether it supports coherent transmission capability assisted by a base station.

14. A communication method, wherein, Applied to terminals, including: Send the first detection reference signal; Receive uplink transmission configuration information returned by the base station; Send a second detection reference signal; Receive coherent transmission assistance information returned by the base station.

15. The method according to claim 14, wherein, The uplink transmission configuration information includes at least one of the following: resource allocation information of the physical uplink shared channel, modulation and coding scheme, transmission precoding matrix indication information, and resource indication of the first probe reference signal.

16. The method of claim 14, wherein, The antenna port that transmits the second probe reference signal is the same as the antenna port corresponding to the resource indication of the first probe reference signal in the uplink transmission configuration information.

17. The method of claim 14, wherein, The coherent transmission auxiliary information includes at least one of the following: inter-antenna phase difference information, inter-antenna phase difference indication information, and transmission precoding matrix indication information.

18. The method according to claim 17, wherein, The coherent transmission auxiliary information is carried in at least one of the following: user-specific downlink control information and group common downlink control information.

19. The method according to claim 18, wherein, The downlink control information carrying the coherent transmission auxiliary information is located on the first carrier component, which is a carrier component other than the carrier component of the currently transmitted data.

20. The method according to claim 18, wherein, The user-specific downlink control information is obtained by inserting a field containing the coherent transmission auxiliary information into the control information of the uplink scheduling data channel. The size of the field is based on the Radio Resource Control (RRC) configuration or the default configuration.

21. The method according to claim 18, wherein, The group of common downlink control information consists of multiple terminal-specific information blocks, which are received by multiple terminals that require coherent transmission auxiliary information.

22. The method according to claim 21, wherein, The information block corresponds one-to-one with the terminal that requires coherent auxiliary information, and the information block contains the coherent transmission auxiliary information of the corresponding terminal; the multiple terminals that require coherent transmission auxiliary information are all configured with the same wireless network temporary identifier; the wireless network temporary identifier is used for notification of coherent transmission auxiliary information.

23. The method according to claim 22, wherein, The number of the information block corresponding to the terminal in the group of common downlink control information is determined by RRC configuration or default configuration; the method further includes: The content of the group common downlink control information is obtained through the temporary identifier of the wireless network. The coherent transmission auxiliary information in the information block corresponding to the terminal is read according to the number of the information block corresponding to the terminal in the group common downlink control information, but the information in other information blocks is not read.

24. The method according to claim 14, wherein, The method further includes: The terminal capability information is sent to the base station, and the terminal capability information is used to characterize whether the terminal has coherent transmission capability.

25. The method according to claim 24, wherein, The terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, having full coherent transmission capability with base station assistance, having partial coherent transmission capability with base station assistance, and having non-coherent transmission capability with base station assistance.

26. The method of claim 24, wherein, The terminal capability information includes at least one of the following: having full coherent transmission capability, having partial coherent transmission capability, having non-coherent transmission capability, and whether it supports coherent transmission capability assisted by a base station.

27. A communication device, wherein, include: Memory and processor; The memory and the processor are coupled; The memory is used to store instructions that can be executed by the processor; When the processor executes the instructions, it performs the method as described in any one of claims 1-26.

28. A computer-readable storage medium, wherein, The computer-readable storage medium includes a non-transitory computer-readable storage medium on which computer instructions are stored, which, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-26.

29. A computer program product, wherein, The computer program product includes computer program instructions that, when executed, implement the method as described in any one of claims 1-26.

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