Communication method, apparatus, storage medium, and program product

Abstract

The application relates to the technical field of communication, and discloses a communication method, a communication device, a storage medium and a program product. The method comprises the following steps: a first network device schedules a terminal device, transmits a first sounding reference signal resource index to the terminal device, and indicates that the first sounding reference signal resource index corresponds to a first link, the first link being a link with only uplink transmission; and the terminal device performs uplink transmission through the first link based on the indication. According to the scheme, the terminal device receives first downlink control information transmitted by the first network device, the first downlink control information comprising an indication that the first sounding reference signal resource index corresponds to the first link, so that the terminal device can perform uplink transmission through the first link based on the first downlink control information, and the reliability of uplink transmission is improved.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method, apparatus, storage medium, and program product. Background Technology

[0002] In flexible access technology, a cell can contain one downlink carrier and multiple uplink carriers. Terminals can flexibly select the uplink carrier within the cell based on service requirements.

[0003] In scenarios with dense uplink deployment, for transmission reception points (TRPs) that only receive uplink signals (UL), there is no downlink synchronization reference signal transmitted. The terminal cannot measure the downlink signal based on the TRP's reference signal at the TRP, and therefore cannot directly determine the path loss of the link with the TRP. The terminal can transmit a sounding reference signal (SRS). The macro base station detects the signal strength of the SRS, and the UL reception point also detects the signal strength of the SRS (and feeds it back to the macro base station). This allows the macro base station to determine the path loss offset and timing advance (TA) based on the difference in signal strength between the two, and then transmits this information to the terminal. Based on this, the terminal can obtain the path loss information of the link on the UL reception point side.

[0004] In beam-based uplink data transmission, the beam is indicated by the Sounding Reference Signal Resource Index (SRI) in the downlink control information (DCI) that schedules the uplink transmission. However, in scenarios where a terminal operates on one downlink and multiple uplink connections, and the transceiver point that only receives uplink data is deployed at a different site from the macro base station, how the terminal device can transmit uplink data to the transceiver point that only receives uplink data is a problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides a communication method, apparatus, storage medium, and program product to accurately determine the first link corresponding to SRI with only uplink transmission, thereby improving the reliability of uplink transmission.

[0006] Firstly, a communication method is provided, which can be executed by a terminal device or a module applied to a terminal device. The following description uses a terminal device as the executing entity.

[0007] In this method, the terminal device receives first downlink control information from a first network device. The first downlink control information is used to schedule transmission on a first link. The first downlink control information includes a first probe reference signal resource index and first indication information. The first indication information is used to indicate that the first probe reference signal resource index corresponds to the first link, and the first link is a link with only uplink transmission. The terminal device performs uplink transmission through the first link based on the first downlink control information.

[0008] Alternatively, the terminal device receives first downlink control information from the first network device. The first downlink control information is used to schedule transmission on the first link. The first downlink control information includes an index of a first SRS resource and first indication information. The first SRS resource is a resource in a first SRS resource set. The first indication information is used to indicate that the first SRS resource belongs to a subset of the first SRS resources, and the SRS resources in the subset of the first SRS resources belong to the first SRS resource set. Based on the first downlink control information, the terminal device performs uplink transmission through the first link.

[0009] For example, the first SRS resource subset corresponds to the first link.

[0010] By employing this method, the first network device includes first indication information in the first downlink control information, indicating that the first probe reference signal resource index included in the first downlink control information corresponds to a first link, which is a link with only uplink transmission. This enables the terminal device to perform uplink transmission based on the first downlink control information through the first link, thereby improving the reliability of uplink transmission.

[0011] In conjunction with the first aspect, in one possible design, the method further includes: the terminal device receiving second downlink control information from the first network device, the second downlink control information being used to schedule transmission on a second link, the second downlink control information including a second probe reference signal resource index and second indication information, the second indication information being used to indicate that the second probe reference signal resource index corresponds to the second link, the second link being a link between the terminal device and the first network device; and the terminal device transmitting through the second link based on the second downlink control information.

[0012] Alternatively, the method further includes: the terminal device receiving second downlink control information from the first network device, the second downlink control information being used to schedule transmission on the second link, the second downlink control information including an index of a second SRS resource and second indication information, the second SRS resource being a resource in the first SRS resource set, the second indication information being used to indicate that the second SRS resource belongs to a subset of the second SRS resources, and the SRS resources in the subset of the second SRS resources belong to the first SRS resource set.

[0013] For example, the second SRS resource subset corresponds to the second link.

[0014] With this design, even though the first and second links share the same SRI, the first network device can accurately schedule the transmission on the first or second link of the terminal device by indicating whether the SRI corresponds to the first or second link, thus improving the reliability of communication.

[0015] In conjunction with the first aspect, in another possible design, the second link is a link that has both downlink and uplink.

[0016] In conjunction with the first aspect, in another possible design, the first link is the uplink between the terminal device and the second network device.

[0017] In conjunction with the first aspect, in another possible design, the second network device is a network device without downlink resources configured.

[0018] In conjunction with the first aspect, in another possible design, the method further includes: the terminal device transmitting a target detection reference signal on the resource corresponding to the first detection reference signal resource index.

[0019] In conjunction with the first aspect, in another possible design, the terminal device transmits a target detection reference signal on the resource corresponding to the first detection reference signal resource index, including: the terminal device transmits the target detection reference signal in the direction of random access signal transmission.

[0020] In conjunction with the first aspect, in another possible design, the method further includes: the terminal device receiving first configuration information from the first network device, the first configuration information being used to configure the spatial relationship between the target probe reference signal and the first reference signal; wherein the first reference signal is one of the following reference signals: channel state information-reference signal (CSI-RS), synchronization signal block (SSB), first probe reference signal and second probe reference signal, the first probe reference signal being the probe reference signal corresponding to the first link, and the second probe reference signal being the probe reference signal corresponding to the second link.

[0021] Alternatively, the method further includes: the terminal device receiving first configuration information from the first network device, the first configuration information being used to configure the spatial relationship between the target detection reference signal and the first reference signal; wherein the first reference signal is one of a first set of reference signals, the first set of reference signals including CSI-RS, SSB, a first detection reference signal and a second detection reference signal, the first detection reference signal being the detection reference signal corresponding to the first link, and the second detection reference signal being the detection reference signal corresponding to the second link.

[0022] With this design, in the case of shared downlink and non-shared uplink, when transmitting SRS, in order to minimize the beam scanning load, the first network device can configure the spatial relationship between the target SRS and the first reference signal. The first reference signal includes one of CSI-RS, SSB, first SRS and second SRS, so that when the terminal device transmits the target SRS through the first link, it can determine which first reference signal to refer to for the transmission direction, thereby improving the reliability of the target SRS transmission.

[0023] In conjunction with the first aspect, in another possible design, the first configuration information is transmission configuration indication information.

[0024] In conjunction with the first aspect, in another possible design, the target power parameter for uplink transmission indicated by the first downlink control information is the same as the power parameter corresponding to the probe reference signal resource index indicated by the first indication information.

[0025] Secondly, a communication method is provided, executed by a first network device or a module applied to the first network device. The following description uses the first network device as the executing entity.

[0026] In this method, a first network device determines first downlink control information, which is used to schedule transmission on a first link. The first downlink control information includes a first probe reference signal resource index and first indication information. The first indication information is used to indicate that the first probe reference signal resource index corresponds to the first link, and the first link is a link with only uplink transmission. The first network device then sends the first downlink control information.

[0027] Alternatively, the method includes: a first network device determining first downlink control information, the first downlink control information being used to schedule transmission on a first link, the first downlink control information including an index of a first SRS resource, the first SRS resource being a resource in a first SRS resource set, the first downlink control information including first indication information, the first indication information being used to indicate that the first SRS resource belongs to a subset of the first SRS resources, and that SRS resources in the subset of the first SRS resources belong to the first SRS resource set; and the first network device sending the first downlink control information.

[0028] For example, the first SRS resource subset corresponds to the first link.

[0029] In conjunction with the second aspect, in one possible design, the method further includes: the first network device determining second downlink control information, the second downlink control information being used to schedule transmission on a second link, the second downlink control information including a second probe reference signal resource index and second indication information, the second indication information being used to indicate that the second probe reference signal resource index corresponds to the second link, the second link being a link between the terminal device and the first network device; and the first network device sending the second downlink control information.

[0030] Alternatively, the method further includes: the first network device determining second downlink control information, the second downlink control information being used to schedule transmission on the second link, the second downlink control information including an index of a second SRS resource, the second SRS resource being a resource in the first SRS resource set, the second downlink control information including second indication information, the second indication information being used to indicate that the second SRS resource belongs to a subset of the second SRS resources, and the SRS resources in the subset of the second SRS resources belong to the first SRS resource set.

[0031] For example, the second SRS resource subset corresponds to the second link.

[0032] In conjunction with the second aspect, in another possible design, the second link is a link that has both downlink and uplink.

[0033] In conjunction with the second aspect, in another possible design, the first link is the uplink between the terminal device and the second network device.

[0034] In conjunction with the second aspect, in yet another possible design, the second network device is a network device without downlink resources configured.

[0035] In conjunction with the second aspect, in another possible design, the method further includes: the first network device receiving first information from the second network device, the first information including the first probe reference signal resource index; the first network device determining first downlink control information, including: the first network device determining the first downlink control information based on the first information.

[0036] In conjunction with the second aspect, in another possible design, the method further includes: the first network device sending first configuration information, the first configuration information being used to configure the spatial relationship between the target detection reference signal and the first reference signal; wherein the first reference signal is one of the following reference signals: CSI-RS, SSB, first detection reference signal and second detection reference signal, the first detection reference signal being the detection reference signal corresponding to the first link, and the second detection reference signal being the detection reference signal corresponding to the second link.

[0037] Alternatively, the method further includes: the first network device sending first configuration information, the first configuration information being used to configure the spatial relationship between the target detection reference signal and the first reference signal; wherein, the first reference signal is one of a first set of reference signals, the first set of reference signals including CSI-RS, SSB, a first detection reference signal and a second detection reference signal, the first detection reference signal being the detection reference signal corresponding to the first link, and the second detection reference signal being the detection reference signal corresponding to the second link.

[0038] In conjunction with the second aspect, in another possible design, the first configuration information is transmission configuration indication information.

[0039] In conjunction with the second aspect, in another possible design, the target power parameter for uplink transmission indicated by the first downlink control information is the same as the power parameter corresponding to the probe reference signal resource index indicated by the first indication information.

[0040] For information on the beneficial effects of the second aspect or any design thereof, please refer to the relevant description in the first aspect.

[0041] Thirdly, a communication method is provided, executed by a second network device or a module applied to the second network device. The following description uses the second network device as the executing entity.

[0042] In this method, a second network device receives a target detection reference signal sent by a terminal device on a resource corresponding to a first detection reference signal resource index; and the second network device sends first information based on the target detection reference signal, the first information including the first detection reference signal resource index.

[0043] In conjunction with the third aspect, in one possible design, the second network device is a network device without downlink resources configured.

[0044] For information on the beneficial effects of the third aspect or any of its designs, please refer to the relevant descriptions in the first aspect.

[0045] Fourthly, a communication method is provided, executed by a terminal device or a module applied to a terminal device. The following description uses the terminal device as the executing entity.

[0046] In this method, a terminal device receives first configuration information from a first network device, the first configuration information being used to configure the spatial relationship between a target detection reference signal and a first reference signal; wherein, the first reference signal is one of the following reference signals: CSI-RS, SSB, a first detection reference signal and a second detection reference signal, the first detection reference signal being a detection reference signal corresponding to a first link, and the second detection reference signal being a detection reference signal corresponding to a second link; and the terminal device transmits the target detection reference signal through the first link based on the first configuration information.

[0047] Using this method, in the case of shared downlink and non-shared uplink, when transmitting SRS, in order to minimize the beam scanning load, the first network device can configure the spatial relationship between the target SRS and the first reference signal. The first reference signal includes one of CSI-RS, SSB, first SRS and second SRS, so that when the terminal device transmits the target SRS through the first link, it can determine which first reference signal to refer to for the transmission direction, thereby improving the reliability of the target SRS transmission.

[0048] In conjunction with the fourth aspect, in one possible design, the first link is a link with only uplink transmission.

[0049] In conjunction with the fourth aspect, in another possible design, the second link is a link that includes both uplink and downlink transmissions.

[0050] In conjunction with the fourth aspect, in another possible design, the first configuration information also includes a cell index, wherein the frequency band corresponding to the first link and at least one frequency band corresponding to the second link belong to the same cell.

[0051] In conjunction with the fourth aspect, in another possible design, at least one frequency band corresponding to the second link may include a downlink frequency band and an uplink frequency band.

[0052] In conjunction with the fourth aspect, in another possible design, at least one frequency band corresponding to the second link may include one downlink frequency band and two uplink frequency bands.

[0053] In conjunction with the fourth aspect, in another possible design, the method further includes: the terminal device receiving first downlink control information from a first network device, the first downlink control information being used to schedule transmission on a first link, the first downlink control information including a first probe reference signal resource index and first indication information, the first indication information being used to indicate that the first probe reference signal resource index corresponds to the first link, the first link being a link with only uplink transmission; and the terminal device performing uplink transmission through the first link based on the first downlink control information.

[0054] Alternatively, the method further includes: the terminal device receiving first downlink control information from a first network device, the first downlink control information being used to schedule transmission on the first link, the first downlink control information including an index of a first SRS resource and first indication information, the first SRS resource being a resource in a first SRS resource set, the first indication information being used to indicate that the first SRS resource belongs to a subset of the first SRS resources, and the SRS resources in the subset of the first SRS resources belong to the first SRS resource set; the terminal device performing uplink transmission through the first link based on the first downlink control information.

[0055] For example, the first SRS resource subset corresponds to the first link.

[0056] By adopting this design, the first network device includes first indication information in the first downlink control information, indicating that the first probe reference signal resource index included in the first downlink control information corresponds to a first link, which is a link with only uplink transmission. This enables the terminal device to perform uplink transmission based on the first downlink control information through the first link, thereby improving the reliability of uplink transmission.

[0057] In conjunction with the fourth aspect, in another possible design, the target power parameter for uplink transmission indicated by the first downlink control information is the same as the power parameter corresponding to the probe reference signal resource index indicated by the first indication information.

[0058] In conjunction with the fourth aspect, in another possible design, the method further includes: the terminal device receiving second downlink control information from the first network device, the second downlink control information being used to schedule transmission on a second link, the second downlink control information including a second probe reference signal resource index and second indication information, the second indication information being used to indicate that the second probe reference signal resource index corresponds to the second link, the second link being a link between the terminal device and the first network device; and the terminal device transmitting through the second link based on the second downlink control information.

[0059] Alternatively, the method further includes: the terminal device receiving second downlink control information from the first network device, the second downlink control information being used to schedule transmission on the second link, the second downlink control information including an index of a second SRS resource and second indication information, the second SRS resource being a resource in the first SRS resource set, the second indication information being used to indicate that the second SRS resource belongs to a subset of the second SRS resources, and the SRS resources in the subset of the second SRS resources belong to the first SRS resource set.

[0060] For example, the second SRS resource subset corresponds to the second link.

[0061] With this design, even though the first and second links share the same SRI, the first network device can accurately schedule the transmission on the first or second link of the terminal device by indicating whether the SRI corresponds to the first or second link, thus improving the reliability of communication.

[0062] In conjunction with the fourth aspect, in another possible design, the second link is a link that has both downlink and uplink.

[0063] In conjunction with the fourth aspect, in another possible design, the first link is the uplink between the terminal device and the second network device.

[0064] In conjunction with the fourth aspect, in yet another possible design, the second network device is a network device without downlink resources configured.

[0065] In conjunction with the fourth aspect, in another possible design, the method further includes: the terminal device transmitting a target detection reference signal on the resource corresponding to the first detection reference signal resource index.

[0066] In conjunction with the fourth aspect, in another possible design, the terminal device transmits a target detection reference signal on the resource corresponding to the first detection reference signal resource index, including: the terminal device transmits the target detection reference signal in the direction of random access signal transmission.

[0067] In conjunction with the fourth aspect, in another possible design, the method further includes: the terminal device receiving first configuration information from the first network device, the first configuration information being used to configure the spatial relationship between the target detection reference signal and the first reference signal; wherein the first reference signal is one of the following reference signals: CSI-RS, SSB, a first detection reference signal and a second detection reference signal, the first detection reference signal being the detection reference signal corresponding to the first link, and the second detection reference signal being the detection reference signal corresponding to the second link.

[0068] Alternatively, the method further includes: the terminal device receiving first configuration information from the first network device, the first configuration information being used to configure the spatial relationship between the target detection reference signal and the first reference signal; wherein the first reference signal is one of a first set of reference signals, the first set of reference signals including CSI-RS, SSB, a first detection reference signal and a second detection reference signal, the first detection reference signal being the detection reference signal corresponding to the first link, and the second detection reference signal being the detection reference signal corresponding to the second link.

[0069] With this design, in the case of shared downlink and non-shared uplink, when transmitting SRS, in order to minimize the beam scanning load, the first network device can configure the spatial relationship between the target SRS and the first reference signal. The first reference signal includes one of CSI-RS, SSB, first SRS and second SRS, so that when the terminal device transmits the target SRS through the first link, it can determine which first reference signal to refer to for the transmission direction, thereby improving the reliability of the target SRS transmission.

[0070] In conjunction with the fourth aspect, in another possible design, the first configuration information is transmission configuration indication information.

[0071] Fifthly, a communication method is provided, executed by a first network device or a module applied to the first network device. The following description uses the first network device as the executing entity.

[0072] In this method, a first network device generates first configuration information, which is used to configure the spatial relationship between a target detection reference signal and a first reference signal; wherein, the first reference signal is one of the following reference signals: CSI-RS, SSB, a first detection reference signal and a second detection reference signal, the first detection reference signal being a detection reference signal corresponding to a first link, and the second detection reference signal being a detection reference signal corresponding to a second link; and the first network device sends the first configuration information.

[0073] Using this method, in the case of shared downlink and non-shared uplink, when transmitting SRS, in order to minimize the beam scanning load, the first network device can configure the spatial relationship between the target SRS and the first reference signal. The first reference signal includes one of CSI-RS, SSB, first SRS and second SRS, so that when the terminal device transmits the target SRS through the first link, it can determine which first reference signal to refer to for the transmission direction, thereby improving the reliability of the target SRS transmission.

[0074] In conjunction with the fifth aspect, in one possible design, the first link is a link with only uplink transmission.

[0075] In conjunction with the fifth aspect, in another possible design, the second link is a link that includes both uplink and downlink transmissions.

[0076] In conjunction with the fifth aspect, in another possible design, the first configuration information also includes a cell index, wherein the frequency band corresponding to the first link and at least one frequency band corresponding to the second link belong to the same cell.

[0077] In conjunction with the fifth aspect, in another possible design, at least one frequency band corresponding to the second link may include a downlink frequency band and an uplink frequency band.

[0078] In conjunction with the fifth aspect, in another possible design, at least one frequency band corresponding to the second link may include one downlink frequency band and two uplink frequency bands.

[0079] For the beneficial effects of the fifth aspect or any design of the fifth aspect, please refer to the relevant description in the fourth aspect.

[0080] Sixthly, a communication method is provided, executed by a terminal device or a module applied to a terminal device. The following description uses the terminal device as the executing entity.

[0081] In this method, the terminal device does not expect the SRS resources of the first link and the second link to be the same.

[0082] Alternatively, the terminal device may expect different SRS resources for the first and second links.

[0083] In conjunction with the sixth aspect, in one possible design, the first link is a link that only transmits uplink data.

[0084] In conjunction with the sixth aspect, in another possible design, the second link is a link that has both downlink and uplink.

[0085] For example, the above SRS resources can also be understood as SRS resource indexes.

[0086] In a seventh aspect, a communication device is provided. The communication device can perform the methods described in the first to sixth aspects or any one of the designs described in the first to sixth aspects. The communication device can be a terminal device or a network device, or it can be a module (e.g., a chip) applied in a terminal device or a module (e.g., a chip) applied in a network device.

[0087] In one possible design, the communication device includes a transceiver unit and a processing unit. The transceiver unit performs the receiving and / or transmitting operations in the methods of the first to sixth aspects or any one of the designs described above; the processing unit performs the processing operations in the methods of the first to sixth aspects or any one of the designs described above.

[0088] In another possible design, the communication device includes a processor coupled to a memory; the processor is configured to support the device in performing the corresponding functions in the channel state information reporting method described above. The memory, coupled to the processor, stores the necessary computer programs (or computer-executable instructions) and / or data of the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements, such as the transmission or reception of data and / or signals. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface. Optionally, the memory may be located internally within the communication device and integrated with the processor; alternatively, it may be located externally to the communication device.

[0089] In another possible design, the communication device includes a processor and a transceiver, the processor being coupled to the transceiver. The processor executes computer programs or instructions to control the transceiver to receive and send information. When the processor executes the computer programs or instructions, it is also used to design the above-mentioned method through logic circuits or execution code instructions. The transceiver can be a transceiver circuit, a transceiver module, or an input / output interface, used to receive signals from other communication devices besides the communication device and transmit them to the processor, or to send signals from the processor to other communication devices besides the communication device. When the communication device is a chip, the transceiver is a transceiver circuit or an input / output interface.

[0090] When the communication device is a chip, the transmitting unit can be an output unit, such as an output circuit or a communication interface; the receiving unit can be an input unit, such as an input circuit or a communication interface. When the communication device is a terminal device, the transmitting unit can be a transmitter or a receiver; the receiving unit can be a receiver or a receiver.

[0091] Eighthly, a computer-readable storage medium is provided that stores a computer program or instructions thereon, which, when executed by a communication device, implement the method as described in the first aspect or any design of the first aspect, or implement the method as described in the second aspect or any design of the second aspect, or implement the method as described in the third aspect or any design of the third aspect, or implement the method as described in the fourth aspect or any design of the fourth aspect, or implement the method as described in the fifth aspect or any design of the fifth aspect, or implement the method as described in the sixth aspect or any design of the sixth aspect.

[0092] Ninthly, a computer program product is provided that, when executed on a communication device, implements the method as described in the first aspect or any design of the first aspect, or implements the method as described in the second aspect or any design of the second aspect, or implements the method as described in the third aspect or any design of the third aspect, or implements the method as described in the fourth aspect or any design of the fourth aspect, or implements the method as described in the fifth aspect or any design of the fifth aspect, or implements the method as described in the sixth aspect or any design of the sixth aspect. Attached Figure Description

[0093] Figure 1 A schematic diagram of the architecture of the communication system 1000 used in the embodiments of this application;

[0094] Figure 2 This is a schematic diagram illustrating an example of a dense uplink deployment scenario in an embodiment of this application;

[0095] Figure 3 This is a schematic diagram illustrating a co-location uplink transmission scenario as exemplified in the embodiments of this application.

[0096] Figure 4 This is a schematic diagram illustrating an embodiment of this application where there is no downlink reference signal at the TRP;

[0097] Figure 5 This is a schematic diagram illustrating a scenario of multiple uplinks in a downlink, as exemplified by an embodiment of this application.

[0098] Figures 6-8 A flowchart illustrating the communication method provided in an embodiment of this application;

[0099] Figures 9-10 This is a schematic diagram of the structure of the communication device provided in the embodiments of this application. Detailed Implementation

[0100] Figure 1 This is a schematic diagram of the architecture of a communication system 1000 provided in an embodiment of this application. Figure 1 As shown, the communication system 1000 includes a radio access network (RAN) 100, wherein the RAN 100 includes at least one RAN node (e.g., Figure 1 110a and 110b, collectively referred to as 110, may also include at least one terminal (such as...). Figure 1 RAN100, denoted as RAN100, comprises RAN nodes 120a-120j, collectively referred to as RAN120. RAN100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment. Figure 1 (Not shown in the image). Terminal 120 is wirelessly connected to RAN node 110. Terminals and RAN nodes can be interconnected via wired or wireless means. Communication system 1000 may also include core network 200. RAN node 110 is connected to core network 200 via wireless or wired means. The core network equipment in core network 200 and RAN node 110 in RAN 100 can be independent physical devices, or they can be the same physical device integrating the logical functions of core network equipment and RAN node. Communication system 1000 may also include Internet 300.

[0101] RAN100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, a 6th generation (6G) radio access system, or a future radio access system as defined in the 3rd generation partnership project (3GPP), or it can be a WiFi system. RAN100 can also include two or more of the above-mentioned different radio access systems. RAN100 can also be an open RAN (O-RAN).

[0102] RAN nodes, also known as radio access network devices, RAN entities, or access nodes, are used to help terminals access communication systems wirelessly. In one application scenario, an RAN node can be a base station, an evolved NodeB (eNodeB), a TRP, a next-generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. RAN nodes can also be macro base stations (such as...) Figure 1 110a in the text), can also be a micro base station or an indoor station (such as... Figure 1 110b in the middle can also be a relay node or a donor node.

[0103] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing different functions of the base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), or a radio unit (RU). Here, the CU performs the functions of the base station's Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP), and can also perform the functions of the Service Data Adaptation Protocol (SDAP). The DU performs the functions of the base station's Radio Link Control (RANC) and Medium Access Control (MAC) layers, and can also perform some or all of the physical layer functions. For specific descriptions of these protocol layers, refer to the relevant 3GPP technical specifications. The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes or integrated into the same RAN node, such as within a baseband unit (BBU). The RU can be included in radio frequency equipment, such as in a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0104] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). The RAN nodes in the embodiments of this application can be implemented through software modules, hardware modules, or a combination of software and hardware modules. For example, a RAN node can be a server loaded with the corresponding software modules. The embodiments of this application do not limit the specific technology or device form used in the RAN nodes. For ease of description, a base station is used as an example of a RAN node in the following description.

[0105] A terminal is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. Terminals can also be called terminal equipment, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grids, smart furniture, smart offices, smart wearables, smart transportation, smart cities, etc. Terminals can be mobile phones, tablets, computers with wireless transceiver capabilities, wearable devices, vehicles, airplanes, ships, robots, robotic arms, smart home devices, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal.

[0106] Base stations and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminals.

[0107] The roles of base stations and terminals can be relative, for example, Figure 1 The helicopter or drone 120i can be configured as a mobile base station. For terminals 120j accessing the wireless access network 100 via 120i, terminal 120i is a base station; however, for base station 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol; in this case, 120i is also a base station relative to 110a. Therefore, both base stations and terminals can be collectively referred to as communication devices. Figure 1 The 110a and 110b in the text can be referred to as communication devices with base station functions. Figure 1 The 120a-120j in the text can be referred to as communication devices with terminal functions.

[0108] Communication between base stations and terminals, between base stations, and between terminals can be conducted using licensed spectrum, unlicensed spectrum, or both simultaneously. Communication can be conducted using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used for wireless communication.

[0109] In the embodiments of this application, the functions of the base station can be executed by modules (such as chips) within the base station, or by a control subsystem that includes base station functions. This control subsystem, including base station functions, can be a control center in the aforementioned application scenarios such as smart grids, industrial control, intelligent transportation, and smart cities. Similarly, the functions of the terminal can be executed by modules (such as chips or modems) within the terminal, or by a device that includes terminal functions.

[0110] In this application, the base station sends downlink signals or downlink information to the terminal, with the downlink information carried on the downlink channel; the terminal sends uplink signals or uplink information to the base station, with the uplink information carried on the uplink channel. To communicate with the base station, the terminal needs to establish a radio connection on a cell controlled by the base station. The cell with which the terminal has established a radio connection is called the terminal's serving cell. When the terminal communicates with this serving cell, it is also susceptible to interference from signals from neighboring cells.

[0111] In carrier aggregation (CA), a primary cell (Pcell) contains one uplink carrier component (UL CC) and one downlink carrier component (DL CC); a secondary cell (Scell) contains one uplink carrier and one downlink carrier. In flexible access technologies, not limited by CA requirements, a cell can contain one downlink carrier and multiple uplink carriers. Terminal devices can flexibly select the uplink carrier within the cell according to service requirements.

[0112] In existing supplementary uplink (SUL) technology, a cell consists of a normal downlink (NDL) carrier in band 1 (B1), a normal uplink (NUL) carrier in band B1, and a SUL carrier in band 0 (B0). The NUL and NDL operate in the same frequency band, and the SUL can be located in a frequency band lower than the NUL's band (B1). Existing supplementary uplink technology is typically co-located, meaning that for a single base station, the uplink frequency band deployed on that base station includes both the NUL and SUL bands.

[0113] On the other hand, 5G communication systems use higher carrier frequencies to expand capacity. These carrier frequencies include the 4.9GHz band and frequencies above 6GHz, such as 28GHz, 38GHz, or 60GHz, to achieve wireless communication with greater bandwidth and higher transmission rates.

[0114] like Figure 2 As shown, in existing 5G systems, in addition to existing SUL co-location scheduling, uplink (UL) dense deployment can also be used for UL capacity enhancement. This UL dense deployment deploys TRP sites (also known as uplink receiving points) with only uplink reception within the coverage area of ​​the macro base station, thereby forming more and denser uplink transmissions and expanding uplink capacity. This also forms a supplementary uplink transmission to the uplink transmission at the macro base station. New higher frequency spectrum 4.9GHz or higher frequency spectrum can be used on the TRP. Typically, it can be used in factory area coverage scenarios. Figure 2 In the middle, the uplink receiving point and the macro base station are located at different sites.

[0115] like Figure 3 The diagram illustrates a scenario of supplementing uplink transmission through co-location. In existing systems, supplementing uplink transmission typically involves co-location. That is, for a macro base station, when uplink capacity expansion is required, the SUL carrier and NUL carrier used are configured as a single cell on the macro base station side. Furthermore, existing standards stipulate that if the terminal equipment (such as...) Figure 3 In a cell, UE1 or UE2 is configured with two carriers, one of which is normal uplink (NUL) and the other is SUL1; or when several other carriers (SUL1 and SUL2) are supplementary uplink carriers, the supplementary uplink carriers use the same timing advance offset (TAoffset) value and path loss value as the normal uplink carriers.

[0116] like Figure 4 The diagram illustrates a scenario where a TRP does not transmit a downlink reference signal. In scenarios with dense uplink deployment, for a TRP that only receives uplink signals, there is no transmission of a downlink synchronization reference signal; in this case, the TRP is also called an uplink receiving point. Terminal devices (such as...) Figure 4 The UE in the TRP cannot perform downlink signal measurement based on the reference signal sent by the TRP, and therefore cannot directly determine the path loss between the terminal device and the TRP.

[0117] For the scenario described above where only uplink reception is involved, the current third-generation partnership program (the 3G) rd The Generation Partnership Project (3GPP) considers the scenario where a macro base station shares a frequency band with a TRP (Transportation Point) that only receives uplink data. In this case, the macro base station covers the same frequency band as the TRP. Because the terminal device cannot perform downlink measurements on the uplink-only TRP side of the link, it cannot obtain path loss information. Therefore, the terminal device sends a Signal-Receiving Message (SRS). The macro base station detects the signal strength of the SRS, as does the TRP (Transportation Point) (which in turn detects the signal strength of the SRS and feeds it back to the macro base station). The macro base station then determines the path loss based on the difference in signal strength and sends this information to the terminal device. Based on this, the terminal device can obtain path loss information for the link on the uplink-only TRP side.

[0118] In this off-site deployment, the TA (Target Acquisition Message) is obtained from the downlink of the macro base station. After obtaining the TA, the terminal equipment determines which link the TA corresponds to and performs narrow beam alignment and data transmission for TRP (Transportation Reference Point) sites that only receive uplink data. How SRS (Short-Range Support Message) is transmitted and how subsequent PUSCH (Push-Uplink Message) is transmitted are our focus.

[0119] In beam-based uplink data transmission, the beam is indicated by the SRI in the DCI. The DCI is used to schedule uplink transmissions. The DCI includes the SRI, which indicates that the beam direction of the uplink transmission is the same as the beam direction of the SRS transmitted by the terminal device corresponding to that SRI. The SRI is associated with beam indication and beam-specific power control parameter indication.

[0120] However, in the scenario mentioned above where a terminal device operates in one downlink and multiple uplinks, if the configuration of the Sounding Reference Signal (SRS) resource is minimized—that is, if the SRS resource configured on links with both downlink and uplink (terminal device and macro base station) is the same as the SRS resource configured on links with only uplink (terminal device and TRP site with only uplink reception) is the same set—the current SRI guidelines cannot distinguish which uplink link is being targeted. For example... Figure 5The diagram illustrates a scenario with multiple uplinks in the downlink. Only the TRP station transmitting uplink uses a high-frequency carrier, and the uplink beam transmission has two links: one link is between the terminal device and the macro base station; the other link is between the terminal device and the TRP station that only receives uplink data (e.g., [example station name]). Figure 5 The link between uplink receiving point 1 and uplink receiving point 2 in the network. To minimize the overhead of SRS resource configuration, shared SRS resources can be configured for the case of shared downlink but not shared uplink.

[0121] In view of this, this application provides a communication scheme in which a first network device includes first indication information in the first downlink control information, indicating that the first probe reference signal resource index included in the first downlink control information corresponds to a first link. This first link is a link with only uplink transmission, thereby enabling the terminal device to perform uplink transmission based on the first downlink control information through the first link, thus improving the reliability of uplink transmission.

[0122] like Figure 6 The diagram shown is a flowchart illustrating a communication method provided in an embodiment of this application. Exemplarily, the method may include the following steps:

[0123] S601. The first network device sends the first downlink control information to the terminal device.

[0124] Accordingly, the terminal device receives the first downlink control information.

[0125] In this embodiment, the operations performed by the terminal device can be performed by the terminal device itself or by modules applied to the terminal device. The modules of the terminal device can be communication modules within the terminal device, or circuits or chips applied to the terminal device (such as modem chips (also known as baseband chips), or system-on-chip (SoC) chips or system-in-package (SIP) chips containing modem cores).

[0126] The operations performed by the first network device can be performed by the first network device itself or by modules applied to the first network device. Modules of the first network device can be communication modules within the first network device, or circuits or chips applied to the first network device.

[0127] In this embodiment, there are uplink and downlink links between the terminal device and the first network device, referred to as the second link; there is also an uplink between the terminal device and the second network device, referred to as the first link. In one example, at least one frequency band corresponding to the second link may include one downlink (DL) band and one NUL band. In another example, at least one frequency band corresponding to the second link may include one downlink band and two uplink bands. The two uplink bands may be NUL and SUL1.

[0128] The first network device and the second network device are located at different sites. The frequency band corresponding to the first link and at least one frequency band corresponding to the second link belong to the same cell. The second network device is a network device without configured downlink resources. Here, "without configured downlink resources" can be understood as downlink resources being mute, off, unused, or not activated.

[0129] The second network device is a network device under the coverage of the first network device that is not configured with downlink resources. For example, the first network device may be a macro base station; the second network device may be a TRP site that only receives uplink data.

[0130] When the first network device schedules the terminal device to perform uplink transmission on the first link, it can send first downlink control information to the terminal device. This first downlink control information is used to schedule transmission on the first link.

[0131] The first downlink control information includes a first sounding reference signal resource index (SRI). This first sounding reference signal resource index identifies a beam direction of a previously transmitted SRS by the terminal device. The first network device sends this first control information to instruct the terminal device to use the same beam direction for uplink transmission as the beam direction of the SRS transmitted by the terminal device corresponding to the SRI.

[0132] In this application, the uplink beam direction is the same as the beam direction of the SRS transmitted by the terminal device corresponding to the SRI. This can also be understood as: the uplink beam direction can be referenced to the beam direction of the SRS transmitted by the terminal device corresponding to the SRI, or the uplink beam direction is close to the beam direction of the SRS transmitted by the terminal device corresponding to the SRI. In this application, beam direction can also be understood as spatial information. Reception and detection can be interchanged.

[0133] In this application, a link can be understood as a path, a transmission direction, or a spatial direction. A link can also be understood as a subset of resources. Correspondence can also be understood as association.

[0134] However, to minimize the configuration of probe reference signal resources (SRIs), i.e., in the case of shared downlink but not shared uplink, one SRI is configured for dual links (when the first network device schedules the terminal device's transmission on the second link, the second SRI carried is exactly the same or partially the same as the aforementioned first SRI). Besides the existing probe reference signal-resource set to be added / modified list (srs-ResourceSetToAddModList), no new probe reference signal-resource set to be added / modified list downlink control information-only uplink receive link (srs-ResourceSetToAddModListDCI-UL-Only-Link) is introduced. That is, for terminal devices with two uplink links and one downlink link, the same srs-ResourceSetToAddModList is shared. Therefore, when the terminal device receives the first downlink control information, it cannot determine whether the uplink transmission is based on the beam direction of the SRS previously transmitted on the first link or the beam direction of the SRS previously transmitted on the second link. Therefore, the first downlink control information also includes first indication information. This first indication information is used to indicate that the first SRI corresponds to the first link. The first link is a link with only uplink transmission. A link with only uplink transmission can also be understood as a link with uplink transmission. "Only uplink transmission" and "with uplink transmission" are interchangeable.

[0135] For example, the first indication information can be 1 bit. For instance, when the value of the 1 bit is "0", it indicates that the SRI carried by the first downlink control information corresponds to the first link; when the value of the 1 bit is "1", it indicates that the SRI carried by the first downlink control information corresponds to the second link. Alternatively, when the value of the 1 bit is "1", it indicates that the SRI carried by the first downlink control information corresponds to the first link; when the value of the 1 bit is "0", it indicates that the SRI carried by the first downlink control information corresponds to the second link.

[0136] The first network device sends the first downlink control information to instruct the terminal device to perform uplink transmission with the same target power parameter as the power parameter corresponding to the SRI indicated by the first indication information. Specifically, the power parameter of the SRS on the first link and the power parameter of the SRS on the second link can be set separately. The power parameter corresponding to the SRI indicated by the first indication information can be understood as the power parameter associated with the SRI on the corresponding link indicated by the first indication information. The terminal device performs uplink transmission based on the power parameter of the link corresponding to the SRI. The link corresponding to the SRI is the beam direction of the SRS corresponding to the SRI. The power parameter of the link corresponding to the SRI is the power parameter of the beam direction of the SRS corresponding to the SRI.

[0137] The uplink transmission includes at least one of the following: uplink signal to be transmitted, uplink data information, or uplink control information. The power parameter includes at least one of the following: target received power value, path loss compensation factor, or closed-loop parameter. The closed-loop parameter includes a closed-loop state index, or a closed-loop state index and a transmission power control (or command) parameter.

[0138] S602. The terminal device performs uplink transmission through the first link based on the first downlink control information.

[0139] After receiving the aforementioned first downlink control information, the terminal device performs uplink transmission through the first link based on the instruction in the first indication information within the first downlink control information. The uplink transmission is directed towards the transmission direction of the SRS identified by the first SRI. The terminal device performs uplink transmission according to the power parameters of the first link identified by the first SRI.

[0140] According to an embodiment of this application, a communication method is provided in which a first network device includes first indication information in the first downlink control information, indicating that the first probe reference signal resource index included in the first downlink control information corresponds to a first link, and the first link is a link with only uplink transmission, thereby enabling the terminal device to perform uplink transmission based on the first downlink control information through the first link, thus improving the reliability of uplink transmission.

[0141] In another embodiment, in the case of shared downlink but not shared uplink, a first SRS resource set can also be configured. This first SRS resource set includes a first SRS resource subset and a second SRS resource subset. SRS resources in the first SRS resource subset belong to the first SRS resource set, and SRS resources in the second SRS resource subset belong to the first SRS resource set.

[0142] Optionally, the first SRS resource subset and the second SRS resource subset may have no common set, partial overlap, or be identical. The first SRS resource subset and the second SRS resource subset may have no common set, which can be understood as the SRS resource indexes contained in the first SRS resource subset and the SRS resource indexes contained in the second SRS resource subset having no common set. The first SRS resource subset and the second SRS resource subset have partial overlap, which can be understood as the SRS resource indexes contained in the first SRS resource subset and the SRS resource indexes contained in the second SRS resource subset having partial overlap. The first SRS resource subset and the second SRS resource subset are identical, which can be understood as the SRS resource indexes contained in the first SRS resource subset and the SRS resource indexes contained in the second SRS resource subset being identical. That is, the SRS resource indexes contained in the first SRS resource subset and the second SRS resource subset may be identical, partially identical, or different.

[0143] As an example: the SRS resource indexes contained in the first SRS resource subset are the same as those contained in the second SRS resource subset, that is: the SRS resource indexes contained in the first SRS resource subset are SRI 1 to 5, and the SRS resource indexes contained in the second SRS resource subset are also SRI 1 to 5.

[0144] As an example: the SRS resource indexes contained in the first SRS resource subset are partially the same as those contained in the second SRS resource subset, that is: the SRS resource indexes contained in the first SRS resource subset are SRI 1 to 5, and the SRS resource indexes contained in the second SRS resource subset are also SRI 3 to 5, or SRI 3 to 7.

[0145] As an example: the SRS resource indexes contained in the first SRS resource subset are different from those contained in the second SRS resource subset; that is, the SRS resource indexes contained in the first SRS resource subset are SRI 1 to 5, and the SRS resource indexes contained in the second SRS resource subset are SRI 6 to 10. When the SRS resource indexes contained in the first SRS resource subset are different from those contained in the second SRS resource subset, the first downlink control information may not contain the first indication information.

[0146] A first SRS resource subset is used for transmission on the first link; a second SRS resource subset is used for transmission on the second link. The first SRS resource subset includes one or more first SRS resources. An SRS resource can also be understood as an SRS resource index. The aforementioned first downlink control information is used to schedule transmission on the first link. The first downlink control information includes an index of the first SRS resource and first indication information, which indicates that the first SRS resource belongs to the first SRS resource subset. When the terminal device receives the aforementioned first downlink control information, it can determine, based on the first indication information, that the first downlink control information schedules transmission on the first link, and the terminal device performs uplink transmission based on the transmission direction of the SRS identified by the index of the first SRS resource.

[0147] Optionally, in another embodiment, the terminal device does not expect the SRS resources of the first link and the second link to be the same, or the terminal device expects the SRS resources of the first link and the second link to be different. Therefore, in the case of shared downlink but not shared uplink, the first network device can configure a first SRS resource set. This first SRS resource set includes a first SRS resource subset and a second SRS resource subset. SRS resources in the first SRS resource subset belong to the first SRS resource set, and SRS resources in the second SRS resource subset belong to the first SRS resource set. The first SRS resource subset and the second SRS resource subset have no common set. The fact that the first SRS resource subset and the second SRS resource subset have no common set can be understood as meaning that the SRS resource indexes contained in the first SRS resource subset and the SRS resource indexes contained in the second SRS resource subset may not have a common set.

[0148] The SRS resource indexes contained in the first SRS resource subset and the SRS resource indexes contained in the second SRS resource subset may not have a common set, meaning that the SRS resource indexes contained in the first SRS resource subset and the SRS resource indexes contained in the second SRS resource subset are different. For example, the SRS resource indexes contained in the first SRS resource subset are SRI 1 to 5, and the SRS resource indexes contained in the second SRS resource subset are also SRI 6 to 10. When the SRS resource indexes contained in the first SRS resource subset and the SRS resource indexes contained in the second SRS resource subset are different, the first downlink control information may not contain the first indication information.

[0149] The above embodiments describe how a terminal device can perform uplink transmission via a first link based on the first downlink control information. The following embodiments, building upon the above embodiments, further describe how the first network device determines the first downlink control information and how the terminal device transmits data via a second link:

[0150] like Figure 7 The diagram shown is a flowchart illustrating another communication method provided in an embodiment of this application. Exemplarily, the method may include the following steps:

[0151] S701. The first network device sends the first configuration information to the terminal device.

[0152] Accordingly, the terminal device receives the first configuration information.

[0153] In this embodiment, the operations performed by the terminal device can be executed by the terminal device itself or by modules applied to the terminal device. These modules can be communication modules within the terminal device, or circuits or chips applied to the terminal device (such as modem chips, or SoC chips or SIP chips containing modem cores).

[0154] The operations performed by the first network device can be performed by the first network device itself or by modules applied to the first network device. Modules of the first network device can be communication modules within the first network device, or circuits or chips applied to the first network device.

[0155] As mentioned earlier, in the prior art, the reference direction for the configured target SRS can be the transmission direction of SSB, CSI-RS, or a previous SRS. In this embodiment, in the case of shared downlink but not shared uplink, the terminal device can transmit SRS through the first link or the second link. Furthermore, to minimize beam scanning load, the reference direction for the configured target SRS also includes the first SRS and the second SRS. The first SRS is the SRS corresponding to the first link, and the second SRS is the SRS corresponding to the second link. The first link is a link with only uplink transmission, which is the link between the terminal device and the second network device. The second link is a link with both uplink and downlink transmission, which is the link between the terminal device and the first network device.

[0156] Based on this, the first network device generates first configuration information and sends the first configuration information to the terminal device. This first configuration information is used to configure the spatial relationship between the target SRS and the first reference signal. The first reference signal is one of the following reference signals: CSI-RS, SSB, first SRS, and second SRS. Alternatively, the first reference signal is one of a first set of reference signals. The first set of reference signals includes CSI-RS, SSB, first SRS, and second SRS.

[0157] S702. The terminal device sends the target SRS on the resource corresponding to the first SRS resource index based on the first configuration information.

[0158] Accordingly, the second network device receives the target SRS.

[0159] In this embodiment, the operations performed by the second network device can be performed by the second network device itself or by a module applied to the second network device. The module of the second network device can be a communication module within the second network device, or a circuit or chip applied to the second network device.

[0160] After receiving the first configuration information, the terminal device determines the first reference signal. In this embodiment, the first reference signal is the first SRS, which corresponds to the first SRI. The terminal device sends the target SRS on the resource corresponding to the first SRI based on the first configuration information, that is, the terminal device sends the target SRS based on the sending direction of the previously sent first SRS.

[0161] For example, before sending the target SRS, the terminal device sends a preamble to the second network device. The second network device sends a random access response (RAR) to the first network device. The first network device forwards the RAR to the terminal device. The terminal device can determine that the RAR is a response to the first link, and accordingly determines that the link direction to be transmitted is the direction in which the preamble was previously sent. Therefore, the terminal device can send the target SRS in the direction in which the random access signal (i.e., the preamble) was sent.

[0162] In this application, "...direction" can also be understood as "...related direction".

[0163] S703. The second network device sends first information to the first network device based on the received target SRS.

[0164] Accordingly, the first network device receives the first information.

[0165] After receiving the target SRS, the second network device determines the direction of the target SRS, that is, determines that the target SRS corresponds to the first SRI. The second network device sends first information to the first network device, wherein the first information includes the first SRI. For example, the first SRI is sent to the first network device via the X2 interface. This allows the first network device to know that the terminal device is aligned with the direction sent by the second network device. Therefore, this direction will be referenced as the uplink transmission direction during subsequent uplink transmission scheduling.

[0166] S704. The first network device determines the first downlink control information based on the first information.

[0167] After receiving the first information, the first network device can determine the direction in which the terminal device aligns with the transmission direction of the second network device, thereby determining the first downlink control information. This first downlink control information is used to schedule transmission on the first link. The first downlink control information includes a first SRI and first indication information. The first indication information indicates that the first SRI corresponds to the first link, which is a link with only uplink transmission.

[0168] S705. The first network device sends the first downlink control information to the terminal device.

[0169] Accordingly, the terminal device receives the first downlink control information.

[0170] For details on how to implement this step, please refer to [link / reference]. Figure 6 Step S601 of the illustrated embodiment will not be described again here.

[0171] S706. The terminal device performs uplink transmission through the first link based on the first downlink control information.

[0172] For details on how to implement this step, please refer to [link / reference]. Figure 6 Step S602 of the illustrated embodiment will not be described again here.

[0173] S707. The first network device sends the second downlink control information to the terminal device.

[0174] Accordingly, the terminal device receives the second downlink control information.

[0175] When the first network device schedules the terminal device to transmit (either uplink or downlink) on the second link, it can send second downlink control information to the terminal device. This second downlink control information is used to schedule transmission on the second link.

[0176] The second downlink control information includes a second SRI. This second SRI identifies a beam direction of a previously transmitted SRS by the terminal device. The first network device sends this second control information to instruct the terminal device to transmit in the same beam direction as the SRS transmitted by the terminal device corresponding to the second SRI.

[0177] Similarly, to minimize the configuration of the sounding reference signal resource (SRI), i.e., in the case of shared downlink but not shared uplink, a single SRI is configured for dual links. This allows the terminal device, upon receiving the second downlink control information, to determine whether to transmit uplink based on the beam direction of the SRS previously transmitted on the first link or the beam direction of the SRS previously transmitted on the second link. Therefore, the second downlink control information also includes second indication information, which indicates that the second SRI corresponds to a second link, which is the link between the terminal device and the first network device. The second link is a link that has both uplink and downlink capabilities.

[0178] For example, the second indication information can be 1 bit. For instance, when the value of the 1 bit is "0", it indicates that the SRI carried in the second downlink control information corresponds to the first link; when the value of the 1 bit is "1", it indicates that the SRI carried in the second downlink control information corresponds to the second link. Alternatively, when the value of the 1 bit is "1", it indicates that the SRI carried in the second downlink control information corresponds to the first link; when the value of the 1 bit is "0", it indicates that the SRI carried in the second downlink control information corresponds to the second link.

[0179] S708. The terminal device transmits information through the second link based on the second downlink control information.

[0180] After receiving the aforementioned second downlink control information, the terminal device transmits the data through the second link based on the instruction in the second indication information within the second downlink control information. The transmission proceeds in the direction of the SRS identified by the second SRI.

[0181] It is understood that the transmission scheduling of the first link (i.e., steps S701-S706) and the transmission scheduling of the second link (i.e., steps S707-S708) can be implemented together or independently. When the transmission scheduling of the first link (i.e., steps S701-S706) and the transmission scheduling of the second link (i.e., steps S707-S708) are implemented independently, the indications of the first control information and the second control information can be similar.

[0182] According to an embodiment of this application, a communication method is provided in which, although the first link and the second link share the same SRI, the first network device can accurately schedule the transmission on the first link or the second link of the terminal device by indicating whether the SRI corresponds to the first link or the second link, thereby improving the reliability of communication.

[0183] In another embodiment, in the case of shared downlink but not shared uplink, a first SRS resource set can also be configured. This first SRS resource set includes a first SRS resource subset and a second SRS resource subset. SRS resources in the first SRS resource subset belong to the first SRS resource set, and SRS resources in the second SRS resource subset belong to the first SRS resource set.

[0184] Optionally, the first SRS resource subset and the second SRS resource subset may have no common set, partial overlap, or be identical. For the meaning of "no common set," "partial overlap," or "identical" for the first SRS resource subset and the second SRS resource subset, please refer to the description above.

[0185] A first SRS resource subset is used for transmission on the first link; a second SRS resource subset is used for transmission on the second link. The first SRS resource subset includes one or more first SRS resources; the second SRS resource subset includes one or more second SRS resources. The aforementioned second downlink control information is used to schedule transmission on the second link. The second downlink control information includes an index of the second SRS resource and second indication information, which indicates that the second SRS resource belongs to the second SRS resource subset. When the terminal device receives the aforementioned second downlink control information, it can determine, based on the second indication information, that the second downlink control information schedules transmission on the second link, and the terminal device performs transmission based on the transmission direction of the SRS identified by the index of the second SRS resource.

[0186] In another embodiment, the first and second indication information can also be combined into a single indication information, such as a third indication information. Therefore, the first and second downlink control information can also be combined into a single control information, such as a third downlink control information. Exemplarily, the third indication information can be 1 bit. For example, when the 1 bit is "0", it indicates that the SRI carried by the third downlink control information corresponds to the first link; when the 1 bit is "1", it indicates that the SRI carried by the third downlink control information corresponds to the second link. Alternatively, when the 1 bit is "1", it indicates that the SRI carried by the third downlink control information corresponds to the first link; when the 1 bit is "0", it indicates that the SRI carried by the third downlink control information corresponds to the second link.

[0187] In the beamforming framework, network devices can control the SRS transmit (Tx) beams of terminal devices through spatial relation configuration (spatialRelationInfo). Spatial relation configuration defines the Tx beams relative to a reference signal (RS). Without spatial relation configuration, no network device / terminal device coordinates which terminal device's Tx beam to scan. For beam selection, the SRS used for beam management can be configured in the spatial relation configuration, allowing the terminal device to determine the transmit beam for each SRS resource based on the NCB uplink.

[0188] The spatial relationship is configured as follows:

[0189]

[0190] The reference direction of the configured SRS can be the transmission direction of the SSB, CSI-RS, or the previous SRS.

[0191] To determine how to transmit SRS and minimize beam scanning load, refer to the spatial relationship configuration mentioned above, i.e., the reference direction of the SRS configured in this signaling configuration. In existing technologies, the reference direction of the configured target SRS can be the SSB, CSI-RS, or the transmission direction of the previous SRS. However, in the scenario mentioned above where a UE is in one downlink and multiple uplinks, the previous SRS transmission direction has two directions, and how the terminal device determines which link direction to face remains unresolved.

[0192] In view of this, this application provides a communication scheme in which, in the case of shared downlink and non-shared uplink, when transmitting SRS, in order to minimize the beam scanning load, the first network device can configure the spatial relationship between the target SRS and the first reference signal. The first reference signal includes one of CSI-RS, SSB, first SRS and second SRS, so that when the terminal device transmits the target SRS through the first link, it can determine which first reference signal to refer to for the transmission direction, thereby improving the reliability of the target SRS transmission.

[0193] like Figure 8 The diagram shown is a flowchart illustrating another communication method provided in an embodiment of this application. Exemplarily, the method may include the following steps:

[0194] S801. The first network device generates the first configuration information.

[0195] In this embodiment, the operation performed by the first network device can be performed by the first network device itself or by a module applied to the first network device. The module of the first network device can be a communication module within the first network device, or a circuit or chip applied to the first network device.

[0196] As mentioned above, in the prior art, the reference direction of the configured target SRS can be the transmission direction of SSB, CSI-RS, or a previous SRS. In this embodiment, in the case of shared downlink and no shared uplink, the terminal device can transmit SRS through the first link or the second link. Furthermore, to minimize beam scanning load, the reference direction of the configured target SRS also includes the first SRS and the second SRS, where the first SRS is the SRS corresponding to the first link, and the second SRS is the SRS corresponding to the second link. The first link is a link with only uplink transmission, which is the link between the terminal device and the second network device. The second link is a link with both uplink and downlink transmission, which is the link between the terminal device and the first network device. In one example, at least one frequency band corresponding to the second link may include one downlink frequency band and one normal uplink (NUL) frequency band. In another example, at least one frequency band corresponding to the second link may include one downlink frequency band and two uplink frequency bands. The two uplink frequency bands may be NUL and SUL1.

[0197] Based on this, the first network device generates first configuration information, wherein the first configuration information is used to configure the spatial relationship between the target SRS and the first reference signal; wherein the first reference signal is one of the following reference signals: CSI-RS, SSB, first SRS and second SRS. Alternatively, the first reference signal is one of a first set of reference signals, the first set of reference signals including CSI-RS, SSB, first SRS and second SRS.

[0198] For example, the first configuration information mentioned above is transmission configuration indication / indicator (TCI).

[0199] For example, a new information element (IE) can be added to SRS-SpatialRelationInfo: srsSecondLink.

[0200] As shown below:

[0201]

[0202]

[0203] When the aforementioned first configuration information indicates srsSecondLink, the terminal device performs uplink transmission with reference to the direction determined based on the SRS association direction (or association angle). srsSecondLink is used to indicate the transmission direction of the SRS for the first link; the existing SRS is used to indicate the transmission direction of the SRS for the second link.

[0204] Accordingly, SRS-SpatialRelationInfo adds spatial correlation, which is the spatial correlation between the target SRS and the new reference SRS (i.e., the first SRS). The target SRS is the SRS to be transmitted, and the new reference SRS is the SRS for the first link (denoted as srsSecondLink).

[0205] Furthermore, the first configuration information also includes a cell index. Specifically, the frequency band corresponding to the first link and at least one frequency band corresponding to the second link belong to the same cell.

[0206] S802. The first network device sends the first configuration information to the terminal device.

[0207] Accordingly, the terminal device receives the first configuration information.

[0208] After generating the first configuration information, the first network device sends the first configuration information to the terminal device.

[0209] For example, the first configuration information can be carried in radio resource control (RRC) signaling.

[0210] In this embodiment, the operations performed by the terminal device can be performed by the terminal device itself or by modules applied to the terminal device. These modules can be communication modules within the terminal device, circuits or chips (such as modem chips) applied to the terminal device, or SoC chips or SIP chips containing modem cores.

[0211] S803. The terminal device sends the target SRS through the first link based on the first configuration information.

[0212] Accordingly, the second network device receives the target SRS.

[0213] After receiving the first configuration information, when the terminal device needs to send the target SRS through the first link, it can determine the beam direction of the reference first reference signal (e.g., the first SRS) based on the first configuration information and send the target SRS.

[0214] According to a communication method provided in an embodiment of this application, in the case of shared downlink and non-shared uplink, when transmitting SRS, in order to minimize the beam scanning load, the first network device can configure the spatial relationship between the target SRS and the first reference signal. The first reference signal includes one of CSI-RS, SSB, first SRS and second SRS, so that when the terminal device transmits the target SRS through the first link, it can determine which first reference signal to refer to for the transmission direction, thereby improving the reliability of the target SRS transmission.

[0215] In this application, the phrase "sending information to... (e.g., a terminal device)" or the related illustrations in the accompanying drawings can be understood as the destination of the information being the terminal device. This can include sending information directly or indirectly to the terminal device. Similarly, the phrase "receiving information from... (e.g., a terminal device)" or "receiving information from... (e.g., a terminal device)" or the related illustrations in the accompanying drawings can be understood as the source of the information being the terminal device. This can include receiving information directly or indirectly from the terminal device. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be interpreted similarly, and will not be elaborated further here.

[0216] It is understood that this application uses terminal devices and network devices as examples to illustrate the interaction, but this application does not limit the entities that can be used to illustrate the interaction. For example, the terminal device in the method provided by this application can also be a chip, chip system, or processor applied to the terminal device, or it can be a logical node, logical module, or software that can implement all or part of the terminal device's functions; the network device in the method provided by this application can also be a chip, chip system, or processor applied to the network device, or it can be a logical node, logical module, or software that can implement all or part of the network device's functions.

[0217] It is understood that, in order to achieve the functions in the above embodiments, the network device and terminal device include hardware structures and / or software modules corresponding to perform each function. Those skilled in the art should readily recognize that, based on the units and method steps of the various examples described in conjunction with the embodiments disclosed in this application, this application 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 scenario and design constraints of the technical solution.

[0218] Figure 9 and Figure 10 The diagram illustrates the possible structures of communication devices provided in embodiments of this application. These communication devices can be used to implement the functions of terminal devices or network devices in the above method embodiments, and thus also achieve the beneficial effects of the above method embodiments. In the embodiments of this application, the communication device may be as follows: Figure 1 One of the terminal devices 120a-120j shown can also be as follows: Figure 1 The network devices 110a or 110b shown can also be modules (such as chips) applied to terminal devices or network devices.

[0219] like Figure 9 As shown, the communication device 900 includes a processing unit 910 and a transceiver unit 920. The communication device 900 is used to implement the above-mentioned... Figures 6-8 The methods illustrated in this embodiment demonstrate the functions of the terminal device or network device.

[0220] When the communication device 900 is used to implement the functions of a terminal device: the transceiver unit 920 is used to implement, for example... Figure 6 In the illustrated embodiment, the terminal device implements one or more operations in steps S601 and S602; or, the transceiver unit 920 is used to implement, for example... Figure 7 In the illustrated embodiment, one or more operations implemented by the terminal device in steps S701, S702, and S705-S708; or, the transceiver unit 920 is used to implement, for example... Figure 8 In the illustrated embodiment, the terminal device performs one or more operations in steps S802 and S803.

[0221] When the communication device 900 is used to implement the functions of the first network device: the transceiver unit 920 is used to implement, for example... Figure 6 In the illustrated embodiment, one or more operations are implemented by the first network device in steps S601 and S602; or, the processing unit 910 is used to implement, for example... Figure 7 Step S704 in the illustrated embodiment, and the transceiver unit 920 are used to implement as follows: Figure 7In the illustrated embodiment, one or more operations implemented by the first network device in steps S701, S703, and S705-S708; or, the processing unit 910 is used to implement, for example... Figure 8 Step S801 in the illustrated embodiment, and the transceiver unit 920 are used to implement as follows: Figure 8 The operation performed by the first network device in step S802 of the illustrated embodiment.

[0222] When the communication device 900 is used to implement the functions of a second network device: the transceiver unit 920 is used to implement, for example... Figure 7 In the illustrated embodiment, the second network device implements one or more operations in steps S702 and S703; or, the transceiver unit 920 is used to implement, for example... Figure 8 The operation implemented by the second network device in step S803 of the illustrated embodiment.

[0223] For a more detailed description of the processing unit 910 and the transceiver unit 920, please refer to [link / reference needed]. Figures 6-8 The relevant descriptions in the method embodiments shown are directly obtained and will not be repeated here.

[0224] When the aforementioned communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules (such as an RF module or antenna) in the terminal device, the information being sent to the terminal device by the network device; or, the terminal device chip sends information to other modules (such as an RF module or antenna) in the terminal device, the information being sent to the network device by the terminal device.

[0225] When the aforementioned communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from other modules (such as radio frequency modules or antennas) in the network device, which is information sent from the terminal device to the network device; or, the network device chip sends information to other modules (such as radio frequency modules or antennas) in the network device, which is information sent from the network device to the terminal device.

[0226] Furthermore, it should be noted that the aforementioned transceiver unit and / or processing unit can be implemented through virtual modules. For example, the processing unit can be implemented through software functional units or virtual devices, and the transceiver unit can be implemented through software functions or virtual devices. Alternatively, the processing unit or transceiver unit can also be implemented through physical devices. For example, if the device is implemented using a chip / chip circuit, the transceiver unit can be an input / output circuit and / or a communication interface, performing input operations (corresponding to the aforementioned receiving operation) and output operations (corresponding to the aforementioned sending operation); the processing unit is an integrated processor, microprocessor, or integrated circuit.

[0227] like Figure 10 As shown, the communication device 1000 includes a processor 1010 and may also include an interface circuit 1020. The processor 1010 and the interface circuit 1020 are coupled to each other. It is understood that the interface circuit 1020 may be a transceiver or an input / output interface. Optionally, the communication device 1000 may also include a memory 1030 (shown as dashed lines in the figure) for storing instructions executed by the processor 1010, or storing input data required by the processor 1010 to execute instructions, or storing data generated after the processor 1010 executes instructions.

[0228] When the communication device 900 is used to implement the functions of a terminal device: the interface circuit 1020 is used to implement, for example... Figure 6 In the illustrated embodiment, the terminal device implements one or more operations in steps S601 and S602; or, the interface circuit 1020 is used to implement such... Figure 7 In the illustrated embodiment, one or more operations implemented by the terminal device in steps S701, S702, and S705-S708; or, the interface circuit 1020 is used to implement, for example... Figure 8 In the illustrated embodiment, the terminal device performs one or more operations in steps S802 and S803.

[0229] When the communication device 900 is used to implement the functions of the first network device: the interface circuit 1020 is used to implement, for example... Figure 6 In the illustrated embodiment, one or more operations are implemented by the first network device in steps S601 and S602; or, the processor 1010 is used to implement such... Figure 7 Step S704 in the illustrated embodiment, and the interface circuit 1020 are used to implement as follows: Figure 7 In the illustrated embodiment, one or more operations implemented by the first network device in steps S701, S703, and S705-S708; or, the processor 1010 is used to implement such... Figure 8 Step S801 in the illustrated embodiment, and the interface circuit 1020 are used to implement as follows: Figure 8 The operation performed by the first network device in step S802 of the illustrated embodiment.

[0230] When the communication device 900 is used to implement the function of a second network device: the interface circuit 1020 is used to implement, for example... Figure 7 In the illustrated embodiment, one or more operations are implemented by the second network device in steps S702 and S703; or, the interface circuit 1020 is used to implement such... Figure 8 The operation implemented by the second network device in step S803 of the illustrated embodiment.

[0231] For a more detailed description of the processor 1010 and interface circuit 1020 mentioned above, please refer to [link / reference]. Figures 6-8The relevant descriptions in the method embodiments shown are directly obtained and will not be repeated here.

[0232] When the aforementioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above method embodiments. The terminal chip receives information from the base station, which can be understood as the information being first received by other modules in the terminal (such as an RF module or antenna), and then sent to the terminal chip by these modules. The terminal chip sends information to the base station, which can be understood as the information being first sent to other modules in the terminal (such as an RF module or antenna), and then sent to the base station by these modules.

[0233] When the aforementioned communication device is a chip applied to a base station, the base station chip implements the functions of the base station in the above method embodiments. The base station chip receives information from the terminal, which can be understood as the information being first received by other modules in the base station (such as an RF module or antenna), and then sent to the base station chip by these modules. The base station chip sends information to the terminal, which can be understood as the information being sent down to other modules in the base station (such as an RF module or antenna), and then sent to the terminal by these modules.

[0234] In this application, entity A sends information to entity B, either directly or indirectly through other entities. Similarly, entity B receives information from entity A, either directly or indirectly through other entities. Entities A and B can be RAN nodes or terminals, or modules within RAN nodes or terminals. Information transmission and reception can be between RAN nodes and terminals, such as between a base station and a terminal; between two RAN nodes, such as between a CU and a DU; or between different modules within a single device, such as between a terminal chip and other modules of the terminal, or between a base station chip and other modules of the base station.

[0235] It is understood that in this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing a certain instruction information to indicate A, it can be understood that the instruction information carries A, directly indicates A, or indirectly indicates A. In this application, the information indicated by the instruction information is called the information to be instructed. In specific implementation, there are many ways to indicate the information to be instructed, such as, but not limited to, directly indicating the information to be instructed, such as the information to be instructed itself or its index, or indirectly indicating the information to be instructed by indicating other information, wherein there is an association between the other information and the information to be instructed. It is also possible to indicate only a part of the information to be instructed, while the other parts of the information to be instructed are known or agreed upon in advance. For example, the instruction of specific information can also be achieved by using the arrangement order of various information in advance (e.g., as specified by a protocol), thereby reducing the instruction overhead to a certain extent. The information to be instructed can be sent as a whole or divided into multiple sub-information to be sent separately, and the sending period and / or sending time of these sub-information can be the same or different. This application does not limit the specific sending method. The sending period and / or timing of these sub-information messages can be predefined, for example, according to a protocol, or configured by the transmitting device by sending configuration information to the receiving device.

[0236] It is understood that the processor in the embodiments of this application can be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, field-programmable gate arrays, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

[0237] The method steps in the embodiments of this application can be implemented in hardware or in software instructions executable by a processor. The software instructions can consist of corresponding software modules, which can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, portable hard disks, optical discs, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can reside in an application-specific integrated circuit (ASIC). Alternatively, the ASIC can reside in a base station or terminal. The processor and the storage medium can also exist as discrete components in the base station or terminal.

[0238] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this application are performed entirely or partially. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable device. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; it can also be an optical medium, such as a digital video optical disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both types of storage media.

[0239] In the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of different embodiments are consistent and can be referenced by each other. The technical features of different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0240] Depending on whether the specification uses "optional": In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes 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, or B alone, where A and B can be singular or plural. In the textual description of this application, the character " / " generally indicates an "or" relationship between the preceding and following related objects; in the formulas of this application, the character " / " indicates a "division" relationship between the preceding and following related objects. "Including at least one of A, B, and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0241] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method, characterized in that, The method, executed by a terminal device or a module applied to a terminal device, includes: The system receives first downlink control information from a first network device. The first downlink control information is used to schedule transmission on a first link. The first downlink control information includes a first probe reference signal resource index and first indication information. The first indication information is used to indicate that the first probe reference signal resource index corresponds to the first link. The first link is a link with only uplink transmission. Based on the first downlink control information, uplink transmission is performed through the first link.

2. The method as described in claim 1, characterized in that, The method further includes: The terminal device receives second downlink control information from the first network device. The second downlink control information is used to schedule transmission on the second link. The second downlink control information includes a second probe reference signal resource index and second indication information. The second indication information is used to indicate that the second probe reference signal resource index corresponds to the second link. The second link is the link between the terminal device and the first network device. Based on the second downlink control information, transmission is carried out through the second link.

3. The method as described in claim 2, characterized in that, The second link is a link that has both downlink and uplink.

4. The method according to any one of claims 1-3, characterized in that, The first link is the uplink between the terminal device and the second network device.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: Send the target detection reference signal on the resource corresponding to the first detection reference signal resource index.

6. The method as described in claim 5, characterized in that, The terminal device transmits a target detection reference signal on the resource corresponding to the first detection reference signal resource index, including: The target detection reference signal is transmitted in the direction of the random access signal transmission.

7. The method as described in claim 5 or 6, characterized in that, The method further includes: The system receives first configuration information from the first network device, which is used to configure the spatial relationship between the target detection reference signal and the first reference signal. The first reference signal is one of the following reference signals: Channel State Information-Reference Signal (CSI-RS), Synchronization Signal Block (SSB), First Detection Reference Signal and Second Detection Reference Signal, where the first detection reference signal is the detection reference signal corresponding to the first link and the second detection reference signal is the detection reference signal corresponding to the second link.

8. A communication method, characterized in that, The method, performed by a first network device or a module applied to the first network device, includes: First downlink control information is determined. The first downlink control information is used to schedule transmission on the first link. The first downlink control information includes a first probe reference signal resource index and first indication information. The first indication information is used to indicate that the first probe reference signal resource index corresponds to the first link. The first link is a link with only uplink transmission. Send the first downlink control information.

9. The method as described in claim 8, characterized in that, The method further includes: Determine second downlink control information, which is used to schedule transmission on the second link. The second downlink control information includes a second probe reference signal resource index and second indication information. The second indication information is used to indicate that the second probe reference signal resource index corresponds to the second link, and the second link is the link between the terminal device and the first network device. Send the second downlink control information.

10. The method as described in claim 9, characterized in that, The second link is a link that has both downlink and uplink.

11. The method according to any one of claims 8-10, characterized in that, The first link is the uplink between the terminal device and the second network device.

12. The method as described in claim 11, characterized in that, The method further includes: Receive first information from the second network device, the first information including the first detection reference signal resource index; The determination of the first downlink control information includes: Based on the first information, the first downlink control information is determined.

13. The method according to any one of claims 8-12, characterized in that, The method further includes: Send first configuration information, which is used to configure the spatial relationship between the target detection reference signal and the first reference signal; wherein, the first reference signal is one of the following reference signals: Channel State Information-Reference Signal (CSI-RS), Synchronization Signal Block (SSB), first detection reference signal and second detection reference signal, the first detection reference signal being the detection reference signal corresponding to the first link, and the second detection reference signal being the detection reference signal corresponding to the second link.

14. A communication device, characterized in that, It includes modules for implementing the method as described in any one of claims 1 to 7, or modules for implementing the method as described in any one of claims 8 to 13.

15. A communication device, characterized in that, The device includes a processor and an interface circuit. The interface circuit is used to receive signals from other communication devices and transmit them to the processor or to send signals from the processor to other communication devices. The processor is used to implement the method as described in any one of claims 1 to 7, or to implement the method as described in any one of claims 8 to 13, through logic circuits or execution code instructions.

16. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions, which, when executed by a communication device, implement the method as described in any one of claims 1 to 7, or the method as described in any one of claims 8 to 13.

17. A computer program product, characterized in that, The computer program product includes relevant program instructions, which, when executed, implement the method as described in any one of claims 1 to 7, or the method as described in any one of claims 8 to 13.

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