Wireless communication method, terminal device, and network device

Abstract

Provided are a wireless communication method, a terminal device, and a network device. The method comprises: a terminal device receives a PDCCH order transmitted by a network device, wherein the PDCCH order comprises first indication information, the first indication information is used for indicating a PL reference signal (RS), and the PL RS is used for calculating transmission power of a PRACH. In the method provided in the present application, a terminal device can more reasonably and accurately estimate PL of a PRACH. For example, in an ICBM scenario, if a UL TRP can transmit an SSB, a terminal device can use the method provided in the present application to estimate PL of a PRACH on the basis of an RS, instead of using PLO for compensation, thereby accurately estimating the PL of the PRACH.

Description

Wireless communication methods, terminal devices, and network devices Technical Field

[0001] This application relates to the field of communication technology, and more specifically, to a wireless communication method, terminal device, and network device. Background Technology

[0002] Related technologies (such as R17's Multiple Input Multiple Output (MIMO) RAN1) define inter-cell beam management (ICBM) scenarios. ICBM involves enhanced asymmetric transmit and receive point (TRP) scenarios. In enhanced asymmetric TRP scenarios, there exists a special TRP, the uplink (UL) TRP. From the perspective of the terminal device, when the terminal device has configured a path loss offset (PLO) in the joint transmission configuration indication (TCI) state or the uplink TCI state, the terminal device does not expect to receive synchronization signal / physical broadcast channel block (SSB) from this UL TRP. When the network device has not configured a PLO for the terminal device, this UL TRP can transmit SSBs. Summary of the Invention

[0003] This application provides a wireless communication method, a terminal device, and a network device. The various aspects covered by this application are described below.

[0004] In a first aspect, a wireless communication method is provided, the method comprising: a terminal device receiving a physical downlink control channel (PDCCH) order sent by a network device; wherein the PDCCH order includes first indication information, the first indication information being used to indicate a path loss reference signal (PLRS), the PLRS being used to calculate the transmission power of a physical random access channel (PRACH).

[0005] In a second aspect, a wireless communication method is provided, the method comprising: a network device sending a PDCCH command to a terminal device; wherein the PDCCH command includes first indication information, the first indication information being used to indicate PL RS, and the PL RS being used to calculate the transmission power of PRACH.

[0006] Thirdly, a terminal device is provided, comprising: a receiving unit for receiving a PDCCH command sent by a network device; wherein the PDCCH command includes first indication information, the first indication information being used to indicate PL RS, and the PL RS being used to calculate the transmission power of PRACH.

[0007] Fourthly, a network device is provided, comprising: a transmitting unit for transmitting a PDCCH command to the network device; wherein the PDCCH command includes first indication information, the first indication information being used to indicate PL RS, and the PL RS being used to calculate the transmission power of PRACH.

[0008] Fifthly, a terminal device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, the processor is used to invoke the program in the memory, and to control the transceiver to receive or send signals so that the terminal device performs some or all of the steps in the method of the first aspect.

[0009] In a sixth aspect, a network device is provided, including a transceiver, a memory, and a processor, wherein the memory is used to store a program, the processor is used to invoke the program in the memory, and to control the transceiver to receive or transmit signals so that the network device performs some or all of the steps in the method of the second aspect.

[0010] In a seventh aspect, a communication system is provided, which includes the aforementioned terminal device and / or network device. In another possible design, the system may further include other devices that interact with the terminal device or network device as described in the embodiments of this application.

[0011] Eighthly, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program that causes a terminal device and / or a network device to perform some or all of the steps in the methods of the above aspects.

[0012] Ninthly, embodiments of this application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program operable to cause a terminal device and / or a network device to perform some or all of the steps of the methods described in the foregoing aspects. In some implementations, the computer program product may be a software installation package.

[0013] In a tenth aspect, embodiments of this application provide a chip including a memory and a processor, the processor being able to call and run a computer program from the memory to implement some or all of the steps described in the methods of the foregoing aspects.

[0014] The method provided in this application enables terminal devices to estimate the PRACH PL more reasonably and accurately. For example, in an ICBM scenario, if the UL TRP can transmit SSB, the terminal device can estimate the PRACH PL based on the reference signal using the method provided in this application, thus eliminating the need for PLO compensation and achieving accurate estimation of the PRACH PL. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the wireless communication system used in the embodiments of this application.

[0016] Figure 2 is an example of a single downlink TRP and multiple uplink TRP scenarios.

[0017] Figure 3 is a schematic flowchart of a communication method provided in an embodiment of this application.

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

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

[0020] Figure 6 is a schematic structural diagram of a communication device provided in an embodiment of this application. Detailed Implementation

[0021] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0022] Communication system

[0023] Figure 1 illustrates a wireless communication system 100 according to an embodiment of this application. The wireless communication system 100 may include communication devices. These communication devices may include a network device 110 and a terminal device 120. The network device 110 may be a device that communicates with the terminal device 120.

[0024] Figure 1 illustrates an exemplary network device and two terminals. Optionally, the wireless communication system 100 may include multiple network devices, and each network device may include other terminal devices within its coverage area. This application embodiment does not limit this.

[0025] Optionally, the wireless communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment.

[0026] It should be understood that the technical solutions of the embodiments of this application can be applied to various communication systems, such as: 5th generation (5G) systems or new radio (NR), long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, etc. The technical solutions provided in this application can also be applied to future communication systems, such as 6th generation mobile communication systems, satellite communication systems, and so on.

[0027] The terminal device in this application embodiment can also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device in this application embodiment can be a device that provides voice and / or data connectivity to a user, and can be used to connect people, objects, and machines, such as a handheld device with wireless connectivity, vehicle-mounted device, etc. The terminal device in the embodiments of this application can be a mobile phone, tablet computer, laptop computer, PDA, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity, providing sidelink signals between UEs in vehicle-to-everything (V2X) or device-to-device (D2D) communication. For example, cellular phones and cars communicate with each other using sidelink signals. Cellular phones and smart home devices communicate without relaying communication signals through a base station.

[0028] The network device in this application embodiment can be a device for communicating with terminal devices. The network device may also include an access network device. The access network device can provide communication coverage for a specific geographical area and can communicate with the terminal device 120 located within that coverage area. The access network device can also be called a wireless access network device or a base station, etc. In this application embodiment, the access network device can refer to a radio access network (RAN) node (or device) that connects the terminal device to the wireless network. Access network equipment can broadly encompass various names as listed below, or be replaced by names such as: NodeB, evolved NodeB (eNB), next-generation NodeB (gNB), relay station, TRP, transmitting point (TP), master eNB (MeNB), secondary eNB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, centralized unit-control plane (CU-CP), centralized unit-user plane (CU-UP), etc. A base station can be a macro base station, micro base station, relay node, donor node, or a combination thereof. A base station can also refer to a communication module, modem, or chip installed within the aforementioned equipment or apparatus. A base station can also be a mobile switching center, equipment performing base station functions in D2D, V2X, and machine-to-machine (M2M) communications, network-side equipment in 6G networks, and equipment performing base station functions in future communication systems. A base station can support networks using the same or different access technologies. The embodiments of this application do not limit the specific technologies or equipment forms used in the access network equipment.

[0029] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move depending on the location of the mobile base station. In other examples, a helicopter or drone can be configured as a device to communicate with another base station.

[0030] Wireless communication systems involve communication equipment that can include not only access network equipment and terminal equipment, but also core network elements. Core network elements can be implemented through devices; that is, core network elements are core network devices. It can be understood that core network devices can also be a type of network device.

[0031] The core network elements in this application embodiment may include network elements that process and forward user signaling and data. For example, core network equipment may include core access and mobility management function (AMF), session management function (SMF), location management function (LMF), network slice selection function (NSSF), authentication server function (AUSF), unified data management (UDM), policy control function (PCF), user plane function (UPF), sensing function (SF), network data analytics function (NWDAF), and artificial intelligence (AI) function management entity, etc. Of course, the core network may also include other network elements, which are not listed here.

[0032] In some deployments, the network device in this application embodiment may refer to a CU or a DU, or the network device may include both a CU and a DU. The gNB may also include an AAU.

[0033] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and satellites. This application does not limit the scenario in which the network devices and terminal devices are located.

[0034] It should be understood that all or part of the functions of the communication device in this application can also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (e.g., a cloud platform).

[0035] Inter-cell beam management (ICBM)

[0036] Related technologies (such as R17 Multiple Input Multiple Output (MIMO) RAN1) define the ICBM scenario. Specifically, in the serving cell, the terminal device can be indicated by the network side with a joint TCI state or a pair of uplink and downlink TCI states. This TCI state can originate from a neighboring non-serving cell, meaning that the physical cell ID (PCI) associated with this TCI state is different from the PCI in the serving cell. Currently, in RRC configuration, this TCI state uses the parameter Additional PCI to configure the PCI of the non-serving cell.

[0037] In the RAN1 discussion, RAN1 proposed using the R17 TCI framework to support ICBM. Specifically, the network side will only indicate the TCI state corresponding to a TRP to the terminal device, either a joint TCI state or a pair of uplink and downlink TCI states.

[0038] For example, the RAN specifies that when configuring Rel-17 unified TCI / ICBM, for frequency range (FR) 1: a combined TCI state or {a downlink TCI state + an uplink TCI state} can be applied; when configuring Rel-17 unified TCI / ICBM, for FR2: {a downlink TCI state + an uplink TCI state} can be applied.

[0039] For example, the RAN specifies that when configuring Rel-18 unified TCI, for FR1: a maximum of two combined TCI states or {one downlink TCI state + a maximum of two uplink TCI states} can be applied; when configuring Rel-17 unified TCI / ICBM, for FR2: {one downlink TCI state + a maximum of two uplink TCI states} can be applied.

[0040] With the development of technology, related technologies have proposed enhanced asymmetric TRP scenarios. In this scenario, there exists a special TRP, namely UL TRP.

[0041] Figure 2 shows an example of an enhanced asymmetric TRP scenario.

[0042] In the scenario shown in Figure 2, there can be one UL TRP and one UL / DL TRP. The UL / DL TRP can provide both uplink reception and downlink transmission capabilities. As shown in Figure 2, the scenario includes only one downlink TRP, namely the downlink sTRP. The scenario in Figure 2 includes multiple uplink TRPs, namely the uplink mTRP. The UL TRP and UL / DL TRP can communicate via a backhaul link.

[0043] From the perspective of the terminal device: if the terminal device is configured with a path loss offset (PLO) in the joint / UL TCI state(s), the terminal device does not expect to receive an SSB from the UL TRP(s).

[0044] When the network device does not configure a PLO for the terminal device, the UL TRP can send a downlink reference signal, i.e., an SSB. This means the terminal device can expect to receive an SSB from the UL TRP(s). However, in this case, the UL TRP does not send other downlink channels or signals. As shown in Figure 2, the UL TRP only sends the downlink SSB, which the terminal device can use to estimate the path loss from the terminal device to the UL TRP. Therefore, the network device does not need to configure a PLO for the UL TRP. Additionally, the UL / DL TRP sends a PDCCH order to the UE, triggering the terminal device to send a PRACH. The UL TRP estimates the uplink timing advance from the terminal device to the UL TRP based on the received PRACH.

[0045] PDCCH order PRACH

[0046] PDCCH order PRACH refers to a random access procedure triggered by a network device. Normally, a random access procedure is initiated by the terminal device. In PDCCH order PRACH, the network device can send commands via PDCCH to force the terminal device to trigger the RACH procedure; this process is called PDCCH order PRACH.

[0047] For downlink control information (DCI) format 1_0 scrambled with cell radio network temporary identity (C-RNTI), if all the frequency domain resource assignment fields are 1, then the DCI format 1_0 is a PDCCH order.

[0048] In ICBM scenarios, to support terminal devices in obtaining uplink timing advance (TA) of the UL TRP, PRACH transmission triggered by the PDCCH order can be supported. However, the main scenario considered by related technologies is the case where the UL TRP does not send an SSB, i.e., the terminal device needs to use a PLO to compensate for the PL estimation, which is estimated based on the downlink reference signal of the DL / UL TRP. In other words, related technologies support the terminal device using a PLO when sending PRACH, and this PLO is associated with the indicated uplink / joint TCI state.

[0049] For example, relevant technical specifications stipulate that for the PL offset indicating PDCCH-order PRACH transmission at least in FR1, the following scheme is supported: within the unified TCI framework, the PL offset associated with the indicated joint / uplink TCI state is applied to the PDCCH-order PRACH transmission. Related technologies also indicate that, based on this, the DCI format needs to be designed in detail. For example, it is necessary to design how the DCI format indicates one of the indicated joint / uplink TCI states, or whether to apply the PL offset in the indicated TCI state.

[0050] For example, relevant technical specifications state that designs applying PL offsets to the PDCCH-order PRACH in FR1 can be fully reused. It should be noted that in some technologies (such as R19), there is no additional transmission beam determination enhancement for the PDCCH-order PRACH in FR2.

[0051] For example, some technologies propose introducing a new 1-bit DCI field into DCI format 1_0 for the PL offset indicating the PDCCH-order PRACH. This DCI field exists when the corresponding RRC parameter (a new RRC parameter used to configure the presence of this 1-bit DCI field) is enabled, and at least one TCI state is configured with a PL offset. When indicating a combined / uplink TCI state in the R17 unified TCI, bit field index 0 of this field indicates that the PL offset is not included in the PRACH transmit power calculation; bit field index 1 indicates that the PL offset associated with the indicated TCI state is included in the PRACH transmit power calculation. That is, when there is only one indicating a combined or uplink TCI state, if this bit is 0, then the PLO is not used to calculate the PRACH transmit power; if this bit is 1, then the PLO is used to calculate the PRACH transmit power. The PLO is associated with the indicated combined or uplink TCI state.

[0052] Therefore, the existing technology only considers how to calculate the PRACH transmission power when the PRACH application uses the PL offset in the PDCCH-order. Consequently, this technology cannot meet the needs of some scenarios. For example, in the case of UL TRP transmitting SSB, the PRACH transmission power cannot be calculated using the PL offset.

[0053] Figure 3 is a schematic flowchart of a wireless communication method provided in an embodiment of this application. The method shown in Figure 3 can be executed by a terminal device and a network device.

[0054] The method shown in Figure 3 may include step S310.

[0055] In step S310, the network device sends a PDCCH command. The terminal device receives the PDCCH command. The PDCCH command can be used to trigger a PRAH. The PDCCH command may include first indication information.

[0056] In some embodiments, the first indication information is used to indicate the PL RS. The PL RS is used to calculate or determine the transmit power of the PRACH. In other words, the first indication information can be used to indicate information related to the PL RS used by the PRACH.

[0057] For example, the first indication information can be used to indicate which downlink reference signal (PLRS) can be used as the basis for estimating the path loss in the PRACH power control parameters. The terminal device can refer to the first indication information to select an appropriate PLRS to calculate the PRACH transmit power. Exemplarily, the PLRS selected by the terminal device can be the PLRS indicated by the first indication information. Alternatively, the terminal device can select a PLRS based on the suggestion of the first indication information. In other words, the first indication information can be used to assist the terminal device in selecting an appropriate PLRS to calculate the PRACH transmit power.

[0058] For example, in the case of a PRACH triggered by a PDCCH command sent by a terminal device, the path loss can be estimated based on the PL RS indicated in the PDCCH command, thereby determining the transmission power of the PRACH.

[0059] In some embodiments, the method shown in FIG3 can be applied in an ICBM scenario. That is, in an ICBM scenario, the communication device can execute step S310. For example, for a UL TRP, if the UL TRP can transmit an SSB, and the DL / UL TRP can transmit an SSB or other downlink reference signal, the terminal device can directly estimate the PL of the PRACH based on the reference signal indicated by the first indication information. That is, the PL of the PRACH can be estimated without PLO compensation.

[0060] Therefore, the method provided in this application enables terminal devices to estimate the PRACH PL more reasonably and accurately. For example, in an ICBM scenario, if the UL TRP can transmit SSB, the terminal device can estimate the PRACH PL based on the reference signal using the method provided in this application, thus eliminating the need for PLO compensation and achieving accurate estimation of the PRACH PL.

[0061] In some embodiments, the PL RS may include any of the following: the DMRS of the PDCCH command; the DL RS that has a QCL relationship with the DMRS of the PDCCH command; or the SSB in the PDCCH command.

[0062] The first indication information can be used to indicate which of the following PL RSs used by PRACH is the DMRS of the PDCCH command, the DL RS that has a QCL relationship with the DMRS of the PDCCH command, or the SSB in the PDCCH command.

[0063] For example, the first indication information may include a first bit. The value of the first bit can represent the following reference signal (i.e., the first value can instruct the terminal device to use the following reference signal as the PL RS to estimate the path loss of the channel): the DMRS of the PDCCH command, or the DL RS that has a QCL relationship with the DMRS of the PDCCH command. A value other than the first bit can represent the SSB in the PDCCH command; that is, a value other than the first bit can instruct the terminal device to use the SSB in the PDCCH command as the PL RS to estimate the path loss of the channel. The aforementioned path loss is used to determine the transmit power of the PRACH that transmits the PDCCH command. The first value can be, for example, 0 or 1.

[0064] For example, the first value can be 0, and non-first values ​​can be 1. For instance, when the first bit is 0, the terminal device uses the following reference signal as the PL RS to estimate the path loss of the channel, which is used to determine the transmission power of the PRACH transmitting the PDCCH order: the DMRS of the PDCCH order, or the DL RS that has a QCL relationship with the DMRS of the PDCCH order. When the first bit is 1, the terminal device uses the indicated SSB in the PDCCH order as the PL RS to estimate the path loss of the channel, which is used to determine the transmission power of the PRACH transmitting the PDCCH order.

[0065] For example, the first value can be 1, and other values ​​can be 0. For instance, when the first bit is 1, the terminal device uses the following reference signal as the PL RS to estimate the path loss of the channel, which is used to determine the transmission power of the PRACH transmitting the PDCCH order: the DMRS of the PDCCH order, or the DL RS that has a QCL relationship with the DMRS of the PDCCH order. When the first bit is 0, the terminal device uses the SSB indicating the path loss in the PDCCH order as the PL RS to estimate the path loss of the channel, which is used to determine the transmission power of the PRACH transmitting the PDCCH order.

[0066] It should be noted that the SSB indicated by the first indication information may carry additional PCI information, that is, the PCI is different from the PCI of the serving cell.

[0067] It should be noted that the PL RS determined by the terminal device based on the first indication information and the PL RS associated with the TCI state indicated in the serving cell of the terminal device are the same, or have a quasi-colocation (QCL) relationship in the spatial domain.

[0068] In some embodiments, the first indication information may be carried in a first indication field. The first indication field may also be used to carry second indication information. That is, the first indication field can be used not only to carry the first indication information but also to carry the second indication information. Multiplexing the same field to indicate the first and second indication information can reduce the waste of communication resources and make efficient use of each bit in the PDCCH command.

[0069] In some embodiments, the terminal device may receive third indication information sent by the network device. The third indication information can be used to indicate the information carried by the first indication field. That is, the third indication information can be used to indicate the function of the first indication field. In other words, the third indication information can be used to indicate whether the first indication field carries first indication information or non-first indication information (e.g., second indication information). For example, in an ICBM scenario (e.g., the network device configures the parameter SSB-MTC-AdditionalPCI for the terminal device), the network device needs to send third indication information to indicate the information carried by the first indication field.

[0070] For example, the value of the third indication information is the second value, which can indicate that the first indication field indicates the first indication information; the value of the third indication information is not the second value, which can indicate that the first indication field indicates the second indication information. The second value can be, for example, 0 or 1.

[0071] As one possible implementation, the third indication information can be carried in the RRC message. That is, the third indication information can be carried in the RRC parameters.

[0072] In some embodiments, the second indication information is used to indicate whether the PL of the PRACH uses PLO compensation. As described above, in an ICBM scenario, the PDCCH command may include 1 bit of indication information, which is used to indicate whether the terminal device uses the PLO associated with the TCI state (the network device may indicate only a joint TCI state or an uplink TCI state) to compensate the PL. This indication information can be the second indication information in this application, and the 1 bit field occupied by this indication information can be the first indication field.

[0073] For ease of description, when the second indication information is used to indicate whether the PRACH's PL uses PLO compensation, the first indication field can be called the PLO application indicator field. When the PLO application indicator field indicates the second indication information, a third value in the PLO application indicator field indicates that the PRACH's PL uses PLO compensation; a non-third value in the PLO application indicator field indicates that the PRACH's PL does not use PLO compensation. The third value can be 0 or 1.

[0074] Therefore, this application reinterprets the PLO application instruction field so that the field can indicate the first instruction information.

[0075] It should be noted that the PLO application instruction field is merely an example name for this field. This field may also be called by other names, and this application makes no restriction on this.

[0076] Under ICBM, if the UL TRP can transmit SSB, and the DL / UL TRP itself can also transmit SSB or other downlink reference signals, the terminal device can directly estimate the PL using the SSB or other reference signals without needing PLO compensation. Therefore, the TCI state indicated by the network device may not have an associated PLO. In this case, the first indication field may not indicate whether the PRACH PL uses PLO compensation, but instead indicate the PL RS.

[0077] In some embodiments, the first indication field may be a PRACH association indicator field. That is, this application reinterprets the PRACH association indicator field so that the field can indicate the first indication information.

[0078] In related technologies, the PRACH association indication field has limitations. These limitations are imposed on the RRC parameter configuration. These limitations may include: the terminal device needs to be provided with a 2TA configuration and two different coresetPoolIndex values, and the PRACH association indication field needs to indicate a non-candidate cell.

[0079] In some embodiments, the PRACH association indicator field can be 0 or 1 bit. If the terminal device is provided with tag2-Id and the terminal device is not provided with coresetPoolIndex, or if a coresetPoolIndex of value 0 is provided for the first CORESETs and a coresetPoolIndex of value 1 is provided for the second CORESETs, the PRACH association indicator field is 1 bit; otherwise, it is 0 bits. If the cell indicated by the cell indicator field is a candidate cell, the PRACH association indicator field is reserved. If the terminal device is provided with SSB-MTC-AdditionalPCI, the PRACH association indicator field indicates the PCI associated with the PRACH transmission. Bit field index 0 of the PRACH association indicator field maps to the PCI of the serving cell, and bit field index 1 maps to the additional PCI associated with the active TCI state. If the terminal device is not provided with SSB-MTC-AdditionalPCI, the PRACH association indicator field indicates the PL RS of the PRACH transmission. Bit field index 0 of this field maps to the DM-RS quasi-co-addressable DL RS of the PDCCH order, and bit field index 1 maps to the SS / PBCH indicated by the SS / PBCH index field in this DCI format.

[0080] In some embodiments, the restriction on the PRACH association indication field is removed. That is, the restriction on the existence of the PRACH association indication field specified in related technologies can be completely or partially removed. For example, the existence of the PRACH association indication field is unrelated to one or more of the following: whether it is an intra-cell situation; the coresetPoolIndex value configured for the terminal device.

[0081] For example, the PRACH association indication field does not require the end device to be configured with two coresetPoolIndex values, nor does it require the configuration of 2TA (tag2-Id). That is, if the end device is not configured with two coresetPoolIndex values ​​or 2TA, the PRACH association indication field can occupy 1 bit.

[0082] For example, the PRACH association indication field does not need to be limited to the intra-cell situation, meaning the terminal device is not restricted to configuring SSB-MTC-AdditionalPCI. It should be noted that in the ICBM scenario, the terminal device is configured with the inter-cell SSB parameter SSB-MTC-AdditionalPCI.

[0083] The method embodiments of this application have been described in detail above. The apparatus embodiments of this application are described in detail below. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments. Therefore, any parts not described in detail can be referred to the foregoing method embodiments.

[0084] Figure 4 is a schematic structural diagram of a terminal device 400 provided in an embodiment of this application. The terminal device 400 may include a receiving unit 410.

[0085] The receiving unit 410 is used to receive a Physical Downlink Control Channel (PDCCH) command sent by a network device; wherein, the PDCCH command includes first indication information, the first indication information is used to indicate a Path Loss Reference Signal (PLRS), and the PLRS is used to calculate the transmission power of the Physical Random Access Channel (PRACH).

[0086] In some embodiments, the PL RS includes any one of the following: the demodulation reference symbol DMRS of the PDCCH command; the downlink reference signal DL RS having a quasi-co-located QCL relationship with the DMRS of the PDCCH command; and the synchronization signal / physical broadcast channel block SSB in the PDCCH command.

[0087] In some embodiments, the first indication information is carried in a first indication field, and the first indication field is also used to carry second indication information.

[0088] In some embodiments, the second indication information is used to indicate whether the path loss PL of the PRACH is compensated using the path loss offset PLO.

[0089] In some embodiments, the first indication field is a PRACH associated indication field.

[0090] In some embodiments, when the PRACH association indication field carries the first indication information, the existence of the PRACH association indication field is unrelated to one or more of the following: whether it is an intra-cell situation; the coresetPoolIndex value configured for the terminal device.

[0091] In some embodiments, the terminal device 400 is further configured to: receive third indication information sent by the network device; wherein the third indication information is used to indicate information carried by the first indication field.

[0092] In some embodiments, the third indication information is carried in a Radio Resource Control (RRC) message.

[0093] In an optional embodiment, the receiving unit 410 may be a transceiver 630. The terminal device 400 may also include a processor 610 and a memory 620, as shown in FIG6.

[0094] Figure 5 is a schematic structural diagram of a network device 500 provided in an embodiment of this application. The network device 500 may include a transmitting unit 510.

[0095] The transmitting unit 510 is used to send a PDCCH command to the terminal device; wherein, the PDCCH command includes first indication information, the first indication information is used to indicate PL RS, and the PL RS is used to calculate the transmission power of PRACH.

[0096] In some embodiments, the PL RS includes any one of the following: the demodulation reference symbol DMRS of the PDCCH command; the downlink reference signal DL RS having a quasi-co-located QCL relationship with the DMRS of the PDCCH command; and the synchronization signal / physical broadcast channel block SSB in the PDCCH command.

[0097] In some embodiments, the first indication information is carried in a first indication field, and the first indication field is also used to carry second indication information.

[0098] In some embodiments, the second indication information is used to indicate whether the path loss PL of the PRACH is compensated using the path loss offset PLO.

[0099] In some embodiments, the first indication field is a PRACH associated indication field.

[0100] In some embodiments, when the PRACH association indication field carries the first indication information, the existence of the PRACH association indication field is unrelated to one or more of the following: whether it is an intra-cell situation; the coresetPoolIndex value configured for the terminal device.

[0101] In some embodiments, the network device 500 is further configured to: send third indication information to the terminal device; wherein the third indication information is used to indicate information carried by the first indication field.

[0102] In some embodiments, the third indication information is carried in an RRC message.

[0103] In an optional embodiment, the transmitting unit 510 may be a transceiver 630. The network device 600 may also include a processor 610 and a memory 620, as shown in FIG6.

[0104] Figure 6 is a schematic structural diagram of a communication apparatus according to an embodiment of this application. The dashed lines in Figure 6 indicate that the unit or module is optional. This apparatus 600 can be used to implement the methods described in the above method embodiments. The apparatus 600 can be a chip, a terminal device, or a network device.

[0105] Apparatus 600 may include one or more processors 610. The processor 610 may support apparatus 600 in implementing the methods described in the preceding method embodiments. The processor 610 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0106] The apparatus 600 may further include one or more memories 620. The memories 620 store a program that can be executed by the processor 610, causing the processor 610 to perform the methods described in the preceding method embodiments. The memories 620 may be independent of the processor 610 or integrated within the processor 610.

[0107] The device 600 may also include a transceiver 630. The processor 610 can communicate with other devices or chips via the transceiver 630. For example, the processor 610 can send and receive data with other devices or chips via the transceiver 630.

[0108] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal or network device provided in this application, and the program causes a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0109] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0110] This application also provides a computer program. This computer program can be applied to the terminal or network device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0111] It should be understood that the terms "system" and "network" in this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0112] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0113] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0114] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0115] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0116] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0117] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0118] In the embodiments of this application, "comprising" can refer to direct inclusion or indirect inclusion. Optionally, "comprising" mentioned in the embodiments of this application can be replaced with "indicating" or "used to determine". For example, "A includes B" can be replaced with "A indicates B" or "A is used to determine B".

[0119] In the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0120] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0121] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0122] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0123] 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 instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs, DVDs) or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0124] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless communication method, characterized in that, include: The terminal device receives the Physical Downlink Control Channel (PDCCH) command sent by the network device; The PDCCH command includes first indication information, which is used to indicate the path loss reference signal PL RS, and the PL RS is used to calculate the transmission power of the physical random access channel PRACH.

2. The method according to claim 1, characterized in that, The PL RS includes any of the following: The demodulation reference symbol DMRS for the PDCCH command; Downlink reference signal DL RS that has a quasi-co-address QCL relationship with the DMRS of the PDCCH command; The synchronization signal / physical broadcast channel block (SSB) in the PDCCH command.

3. The method according to claim 1 or 2, characterized in that, The first indication information is carried in the first indication field, and the first indication field is also used to carry the second indication information.

4. The method according to claim 3, characterized in that, The second indication information is used to indicate whether the path loss PL of the PRACH is compensated using the path loss offset PLO.

5. The method according to claim 3, characterized in that, The first indication field is the PRACH associated indication field.

6. The method according to claim 5, characterized in that, When the PRACH association indication field carries the first indication information, the existence of the PRACH association indication field is unrelated to one or more of the following: whether it is an intra-cell situation; the coresetPoolIndex value configured for the terminal device.

7. The method according to any one of claims 3-6, characterized in that, Also includes: The terminal device receives the third indication information sent by the network device; The third indication information is used to indicate the information carried by the first indication field.

8. The method according to claim 7, characterized in that, The third indication information is carried in the Radio Resource Control (RRC) message.

9. A wireless communication method, characterized in that, include: Network devices send Physical Downlink Control Channel (PDCCH) commands to terminal devices; The PDCCH command includes first indication information, which is used to indicate the path loss reference signal PL RS, and the PL RS is used to calculate the transmission power of the physical random access channel PRACH.

10. The method according to claim 9, characterized in that, The PL RS includes any of the following: The demodulation reference symbol DMRS for the PDCCH command; Downlink reference signal DL RS that has a quasi-co-address QCL relationship with the DMRS of the PDCCH command; The synchronization signal / physical broadcast channel block (SSB) in the PDCCH command.

11. The method according to claim 9 or 10, characterized in that, The first indication information is carried in the first indication field, and the first indication field is also used to carry the second indication information.

12. The method according to claim 11, characterized in that, The second indication information is used to indicate whether the path loss PL of the PRACH is compensated using the path loss offset PLO.

13. The method according to claim 11, characterized in that, The first indication field is the PRACH associated indication field.

14. The method according to claim 13, characterized in that, When the PRACH association indication field carries the first indication information, the existence of the PRACH association indication field is unrelated to one or more of the following: whether it is an intra-cell situation; the coresetPoolIndex value configured for the terminal device.

15. The method according to any one of claims 11-14, characterized in that, Also includes: The network device sends a third instruction message to the terminal device; The third indication information is used to indicate the information carried by the first indication field.

16. The method according to claim 15, characterized in that, The third indication information is carried in the Radio Resource Control (RRC) message.

17. A terminal device, characterized in that, include: The receiving unit is used to receive Physical Downlink Control Channel (PDCCH) commands sent by network devices. The PDCCH command includes first indication information, which is used to indicate the path loss reference signal PL RS, and the PL RS is used to calculate the transmission power of the physical random access channel PRACH.

18. The terminal device according to claim 17, characterized in that, The PL RS includes any of the following: The demodulation reference symbol DMRS for the PDCCH command; Downlink reference signal DL RS that has a quasi-co-address QCL relationship with the DMRS of the PDCCH command; The synchronization signal / physical broadcast channel block (SSB) in the PDCCH command.

19. The terminal device according to claim 17 or 18, characterized in that, The first indication information is carried in the first indication field, and the first indication field is also used to carry the second indication information.

20. The terminal device according to claim 19, characterized in that, The second indication information is used to indicate whether the path loss PL of the PRACH is compensated using the path loss offset PLO.

21. The terminal device according to claim 19, characterized in that, The first indication field is the PRACH associated indication field.

22. The terminal device according to claim 21, characterized in that, When the PRACH association indication field carries the first indication information, the existence of the PRACH association indication field is unrelated to one or more of the following: whether it is an intra-cell situation; the coresetPoolIndex value configured for the terminal device.

23. The terminal device according to any one of claims 19-22, characterized in that, Also used for: Receive the third indication information sent by the network device; The third indication information is used to indicate the information carried by the first indication field.

24. The terminal device according to claim 23, characterized in that, The third indication information is carried in the Radio Resource Control (RRC) message.

25. A network device, characterized in that, include: The transmitting unit is used to send Physical Downlink Control Channel (PDCCH) commands to the terminal device. The PDCCH command includes first indication information, which is used to indicate the path loss reference signal PL RS, and the PL RS is used to calculate the transmission power of the physical random access channel PRACH.

26. The network device according to claim 25, characterized in that, The PL RS includes any of the following: The demodulation reference symbol DMRS for the PDCCH command; Downlink reference signal DL RS that has a quasi-co-address QCL relationship with the DMRS of the PDCCH command; The synchronization signal / physical broadcast channel block (SSB) in the PDCCH command.

27. The network device according to claim 25 or 26, characterized in that, The first indication information is carried in the first indication field, and the first indication field is also used to carry the second indication information.

28. The network device according to claim 27, characterized in that, The second indication information is used to indicate whether the path loss PL of the PRACH is compensated using the path loss offset PLO.

29. The network device according to claim 27, characterized in that, The first indication field is the PRACH associated indication field.

30. The network device according to claim 29, characterized in that, When the PRACH association indication field carries the first indication information, the existence of the PRACH association indication field is unrelated to one or more of the following: whether it is an intra-cell situation; the coresetPoolIndex value configured for the terminal device.

31. The network device according to any one of claims 27-30, characterized in that, Also used for: Send a third instruction message to the terminal device; The third indication information is used to indicate the information carried by the first indication field.

32. The network device according to claim 31, characterized in that, The third indication information is carried in the Radio Resource Control (RRC) message.

33. A terminal device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or send signals so that the terminal device performs the method as described in any one of claims 1-8.

34. A network device, characterized in that, The device includes a transceiver, a memory, and a processor. The memory stores a program, and the processor invokes the program in the memory and controls the transceiver to receive or transmit signals so that the network device performs the method as described in any one of claims 9-16.

35. An apparatus, characterized in that, Includes a processor for calling a program from memory to cause the apparatus to perform the method as described in any one of claims 1-16.

36. A chip, characterized in that, Includes a processor for calling a program from memory, causing a device on which the chip is mounted to perform the method as described in any one of claims 1-16.

37. A computer-readable storage medium, characterized in that, It contains a program that causes a computer to perform the method as described in any one of claims 1-16.

38. A computer program product, characterized in that, Includes a program that causes a computer to perform the method as described in any one of claims 1-16.

39. A computer program, characterized in that, The computer program causes the computer to perform the method as described in any one of claims 1-16.

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