Methods and apparatus in nodes for wireless communication

Abstract

The present application provides a method and an apparatus used in a node for wireless communication. The first node used for wireless communication includes: a first receiver, which receives first signaling for determining a plurality of groups of physical random access channel occasions, where any one of the plurality of groups of physical random access channel occasions includes a plurality of physical random access channel occasions; and a second receiver, which receives second signaling for indicating a value of a first index, and the value of the first index corresponds to at least one of the plurality of groups of physical random access channel occasions.

Description

[0001] This application is a divisional application of a Chinese patent application with the application number 202380010764.6 and the application title "Methods and Apparatuses in Nodes for Wireless Communication" filed on May 12, 2023. Technical Field

[0002] This application relates to the field of communication technologies, and more particularly, to a method and an apparatus in a node for wireless communication. Background Art

[0003] To enhance the coverage performance of the physical random access channel (PRACH), some communication systems (such as the new radio (NR) system) plan to introduce a scheme of multiple PRACH transmissions. In the scheme of multiple PRACH transmissions, multiple PRACHs can be transmitted on a physical random access channel occasion group (ROG). Then, how to determine the ROG corresponding to multiple PRACH transmissions is a problem to be solved. Summary of the Invention

[0004] Embodiments of this application provide a method and an apparatus in a node for wireless communication. The following introduces various aspects related to this application.

[0005] In a first aspect, a first node for wireless communication is provided, including: a first receiver, configured to receive a first signaling for determining a plurality of physical random access channel occasion groups, where any one of the plurality of physical random access channel occasion groups includes a plurality of physical random access channel occasions; and a second receiver, configured to receive a second signaling for indicating a value of a first index, where the value of the first index corresponds to at least one of the plurality of physical random access channel occasion groups.

[0006] As an implementation, the first node includes: a first transmitter, configured to transmit a plurality of physical random access channels on a target physical random access channel occasion group, where the target physical random access channel occasion group is one of the at least one physical random access channel occasion group corresponding to the value of the first index.

[0007] As an implementation, the first node includes: a first transmitter that transmits multiple physical random access channels on a target set of physical random access channel opportunities; wherein the target set of physical random access channel opportunities is a set of physical random access channel opportunities among the multiple sets of physical random access channel opportunities determined by the first signaling, excluding at least one set of physical random access channel opportunities corresponding to the value of the first index.

[0008] As an implementation, the value of the first index is one of a plurality of non - negative integers, and the plurality of non - negative integers are in one - to - one correspondence with a plurality of subsets of sets of physical random access channel opportunities; any subset of the plurality of subsets of sets of physical random access channel opportunities includes at least one set of physical random access channel opportunities among the multiple sets of physical random access channel opportunities.

[0009] As an implementation, at least one set of physical random access channel opportunities included in at least one subset of the plurality of subsets of sets of physical random access channel opportunities is allowed to be used for the transmission of multiple physical random access channels.

[0010] As an implementation, at least one set of physical random access channel opportunities included in at least one subset of the plurality of subsets of sets of physical random access channel opportunities is prohibited from being used for the transmission of multiple physical random access channels.

[0011] As an implementation, a third signaling is used to configure the correspondence between the plurality of non - negative integers and the plurality of subsets of sets of physical random access channel opportunities.

[0012] As an implementation, the at least one set of physical random access channel opportunities corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

[0013] As an implementation, the value of the first index corresponds to a first physical random access channel opportunity set index, and the first physical random access channel opportunity set index is used to determine a first set of physical random access channel opportunities from the multiple sets of physical random access channel opportunities.

[0014] As an implementation, the value of the first index corresponds to a first number of opportunities, and the number of physical random access channel opportunities included in at least one set of physical random access channel opportunities among the multiple sets of physical random access channel opportunities is equal to the first number of opportunities.

[0015] As an implementation, the value of the first index corresponds to a first physical random access channel occasion index, and the first physical random access channel occasion index is used to determine a first physical random access channel occasion from multiple physical random access channel occasions included in the multiple physical random access channel occasion groups. Any physical random access channel occasion among the multiple physical random access channel occasions included in the multiple physical random access channel occasion groups belongs to one of the multiple physical random access channel occasion groups.

[0016] As an implementation, the second signaling includes multiple indication fields, and at least one of the multiple indication fields is used to indicate the value of the first index.

[0017] As an implementation, the multiple indication fields include at least two of the following: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field; wherein, the first index field is used to indicate at least one physical random access channel occasion group among the multiple physical random access channel occasion groups; or, the synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate at least one physical random access channel occasion group among the multiple physical random access channel occasion groups.

[0018] In a second aspect, a second node for wireless communication is provided, including: a first transmitter that sends first signaling, where the first signaling is used to determine multiple physical random access channel occasion groups, and any physical random access channel occasion group among the multiple physical random access channel occasion groups includes multiple physical random access channel occasions; a second transmitter that sends second signaling, where the second signaling is used to indicate the value of a first index, and the value of the first index corresponds to at least one physical random access channel occasion group among the multiple physical random access channel occasion groups.

[0019] As an implementation, the second node includes: a first receiver that receives multiple physical random access channels, where the multiple physical random access channels are sent on a target physical random access channel occasion group; wherein, the target physical random access channel occasion group is one of the at least one physical random access channel occasion group corresponding to the value of the first index.

[0020] As an implementation, the second node includes: a first receiver that receives multiple physical random access channels, where the multiple physical random access channels are sent on a target physical random access channel occasion group; wherein, the target physical random access channel occasion group is a physical random access channel occasion group other than the at least one physical random access channel occasion group corresponding to the value of the first index among the multiple physical random access channel occasion groups determined by the first signaling.

[0021] As an implementation manner, the value of the first index is one of a plurality of non - negative integers, and the plurality of non - negative integers are respectively in one - to - one correspondence with a plurality of subsets of physical random access channel occasion groups; any one of the plurality of subsets of physical random access channel occasion groups includes at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0022] As an implementation manner, at least one physical random access channel occasion group included in at least one of the plurality of subsets of physical random access channel occasion groups is allowed to be used for the transmission of a plurality of physical random access channels.

[0023] As an implementation manner, at least one physical random access channel occasion group included in at least one of the plurality of subsets of physical random access channel occasion groups is prohibited from being used for the transmission of a plurality of physical random access channels.

[0024] As an implementation manner, a third signaling is used to configure the correspondence between the plurality of non - negative integers and the plurality of subsets of physical random access channel occasion groups.

[0025] As an implementation manner, at least one physical random access channel occasion group corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

[0026] As an implementation manner, the value of the first index corresponds to a first physical random access channel occasion group index, and the first physical random access channel occasion group index is used to determine a first physical random access channel occasion from the plurality of physical random access channel occasion groups.

[0027] As an implementation manner, the value of the first index corresponds to a first occasion number, and the number of physical random access channel occasions included in at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups is equal to the first occasion number.

[0028] As an implementation manner, the value of the first index corresponds to a first physical random access channel occasion index, and the first physical random access channel occasion index is used to determine a first physical random access channel occasion from the plurality of physical random access channel occasions included in the plurality of physical random access channel occasion groups, and any one of the plurality of physical random access channel occasions included in the plurality of physical random access channel occasion groups belongs to one of the plurality of physical random access channel occasion groups.

[0029] As an implementation manner, the second signaling includes a plurality of indication fields, and at least one of the plurality of indication fields is used to indicate the value of the first index.

[0030] As an implementation manner, the plurality of indication fields includes at least two of the following: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field; wherein, the first index field is used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups; or, the synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0031] In a third aspect, a method in a first node for wireless communication is provided, including: receiving first signaling, the first signaling being used to determine a plurality of physical random access channel occasion groups, and any physical random access channel occasion group among the plurality of physical random access channel occasion groups includes a plurality of physical random access channel occasions; receiving second signaling, the second signaling being used to indicate the value of a first index, the value of the first index corresponding to at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0032] As an implementation manner, the method further includes: sending a plurality of physical random access channels on a target physical random access channel occasion group; wherein, the target physical random access channel occasion group is one of the at least one physical random access channel occasion group corresponding to the value of the first index.

[0033] As an implementation manner, the method further includes: sending a plurality of physical random access channels on a target physical random access channel occasion group; wherein, the target physical random access channel occasion group is a physical random access channel occasion group among the plurality of physical random access channel occasion groups determined by the first signaling and other than the at least one physical random access channel occasion group corresponding to the value of the first index.

[0034] As an implementation manner, the value of the first index is one of a plurality of non-negative integers, and the plurality of non-negative integers are respectively in one-to-one correspondence with a plurality of subsets of physical random access channel occasion groups; any subset of physical random access channel occasion groups among the plurality of subsets of physical random access channel occasion groups includes at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0035] As an implementation manner, at least one physical random access channel occasion group subset included in the plurality of physical random access channel occasion group subsets includes at least one physical random access channel occasion group that is allowed to be used for the transmission of a plurality of physical random access channels.

[0036] As an implementation manner, at least one physical random access channel occasion group subset included in the plurality of physical random access channel occasion group subsets includes at least one physical random access channel occasion group that is prohibited from being used for the transmission of a plurality of physical random access channels.

[0037] As an implementation manner, a third signaling is used to configure the correspondence between the plurality of non-negative integers and the plurality of physical random access channel occasion group subsets.

[0038] As an implementation manner, the at least one physical random access channel occasion group corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

[0039] As an implementation manner, the value of the first index corresponds to a first physical random access channel occasion group index, and the first physical random access channel occasion group index is used to determine a first physical random access channel occasion from the plurality of physical random access channel occasion groups.

[0040] As an implementation manner, the value of the first index corresponds to a first number of occasions, and the number of physical random access channel occasions included in at least one physical random access channel occasion group in the plurality of physical random access channel occasion groups is equal to the first number of occasions.

[0041] As an implementation manner, the value of the first index corresponds to a first physical random access channel occasion index, and the first physical random access channel occasion index is used to determine a first physical random access channel occasion from the plurality of physical random access channel occasions included in the plurality of physical random access channel occasion groups, and any physical random access channel occasion in the plurality of physical random access channel occasions included in the plurality of physical random access channel occasion groups belongs to one of the plurality of physical random access channel occasion groups.

[0042] As an implementation manner, the second signaling includes a plurality of indication fields, and at least one of the plurality of indication fields is used to indicate the value of the first index.

[0043] As an implementation, the plurality of indication fields include at least two of the following: an uplink / supplementary uplink indication field, a synchronization signal / physical broadcast channel block index field, a first index field, and a reserved field; wherein the first index field is used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups; or, the synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0044] In a fourth aspect, a method in a second node for wireless communication is provided, including: sending a first signaling, the first signaling being used to determine a plurality of physical random access channel occasion groups, any one of the plurality of physical random access channel occasion groups including a plurality of physical random access channel occasions; sending a second signaling, the second signaling being used to indicate a value of a first index, the value of the first index corresponding to at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0045] As an implementation, the method further includes: receiving a plurality of physical random access channels, the plurality of physical random access channels being sent on a target physical random access channel occasion group; wherein the target physical random access channel occasion group is one of the at least one physical random access channel occasion group corresponding to the value of the first index.

[0046] As an implementation, the method further includes: receiving a plurality of physical random access channels, the plurality of physical random access channels being sent on a target physical random access channel occasion group; wherein the target physical random access channel occasion group is a physical random access channel occasion group other than the at least one physical random access channel occasion group corresponding to the value of the first index among the plurality of physical random access channel occasion groups determined by the first signaling.

[0047] As an implementation, the value of the first index is one of a plurality of non-negative integers, the plurality of non-negative integers being in one-to-one correspondence with a plurality of subsets of physical random access channel occasion groups respectively; any one of the plurality of subsets of physical random access channel occasion groups includes at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0048] As an implementation, at least one physical random access channel occasion group included in at least one subset of the plurality of physical random access channel occasion groups is allowed to be used for the transmission of a plurality of physical random access channels.

[0049] As an implementation manner, at least one physical random access channel occasion group subset among the multiple physical random access channel occasion group subsets includes at least one physical random access channel occasion group that is prohibited from being used for the transmission of multiple physical random access channels.

[0050] As an implementation manner, a third signaling is used to configure the correspondence between the multiple non - negative integers and the multiple physical random access channel occasion group subsets.

[0051] As an implementation manner, the at least one physical random access channel occasion group corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

[0052] As an implementation manner, the value of the first index corresponds to a first physical random access channel occasion group index, and the first physical random access channel occasion group index is used to determine a first physical random access channel occasion from the multiple physical random access channel occasion groups.

[0053] As an implementation manner, the value of the first index corresponds to a first occasion number, and the number of physical random access channel occasions included in at least one physical random access channel occasion group among the multiple physical random access channel occasion groups is equal to the first occasion number.

[0054] As an implementation manner, the value of the first index corresponds to a first physical random access channel occasion index, and the first physical random access channel occasion index is used to determine a first physical random access channel occasion from the multiple physical random access channel occasions included in the multiple physical random access channel occasion groups, and any physical random access channel occasion among the multiple physical random access channel occasions included in the multiple physical random access channel occasion groups belongs to one of the multiple physical random access channel occasion groups.

[0055] As an implementation manner, the second signaling includes multiple indication fields, and at least one of the multiple indication fields is used to indicate the value of the first index.

[0056] As an implementation manner, the multiple indication fields include at least two of the following: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field; wherein, the first index field is used to indicate at least one physical random access channel occasion group among the multiple physical random access channel occasion groups; or, the synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate at least one physical random access channel occasion group among the multiple physical random access channel occasion groups.

[0057] Fifth aspect, there is provided a first node for use in wireless communication, including a transceiver, a memory, and a processor. The memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals, so that the first node executes the method described in any implementation manner of the third aspect.

[0058] Sixth aspect, there is provided a second node for use in wireless communication, including a transceiver, a memory, and a processor. The memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals, so that the second node executes the method described in any implementation manner of the fourth aspect.

[0059] Seventh aspect, an embodiment of the present application provides a communication system, which includes the above-mentioned first node and / or second node. In another possible design, the system may further include other devices that interact with the first node or the second node in the solution provided by the embodiment of the present application.

[0060] Eighth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and the computer program enables a computer to execute some or all of the steps in the methods of the above-mentioned aspects.

[0061] Ninth aspect, an embodiment of the present application provides a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable a computer to execute some or all of the steps in the methods of the above-mentioned aspects. In some implementation manners, the computer program product may be a software installation package.

[0062] Tenth aspect, an embodiment of the present application provides a chip, which includes a memory and a processor. The processor can call and run a computer program from the memory to implement some or all of the steps described in the methods of the above-mentioned aspects.

[0063] In the case where the first node corresponds to multiple physical random access channel opportunity sets, an embodiment of the present application may use a second signaling to indicate at least one physical random access channel opportunity set among the multiple physical random access channel opportunity sets, so that the first node determines the physical random access channel opportunity sets corresponding to multiple PRACH transmissions according to the indication of the second signaling. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 FIG. is a schematic diagram of the system architecture of a wireless communication system to which the embodiments of the present application can be applied.

[0065] Figure 2Schematic flowchart of a method in a first node for wireless communication provided by an embodiment of the present application.

[0066] Figure 3 Schematic flowchart of a method in a first node for wireless communication provided by another embodiment of the present application.

[0067] Figure 4 An example of multiple PRACH transmissions conflicting with other transmissions.

[0068] Figure 5 An example of the indication corresponding to the PRACH mask index indication field.

[0069] Figure 6 Another example of the indication corresponding to the PRACH mask index indication field.

[0070] Figure 7 Another example of the indication corresponding to the PRACH mask index indication field.

[0071] Figure 8 Another example of the indication corresponding to the PRACH mask index indication field.

[0072] Figure 9 Another example of the indication corresponding to the PRACH mask index indication field.

[0073] Figure 10 Another example of the indication corresponding to the PRACH mask index indication field.

[0074] Figure 11 Schematic flowchart of a method in a second node for wireless communication provided by an embodiment of the present application.

[0075] Figure 12 Schematic structural diagram of a node for wireless communication provided by an embodiment of the present application.

[0076] Figure 13 Schematic structural diagram of a node for wireless communication provided by another embodiment of the present application.

[0077] Figure 14 Schematic structural diagram of a device provided by an embodiment of the present application.

[0078] Figure 15 Schematic diagram of the hardware module of a communication device provided by an embodiment of the present application. Detailed implementation manners

[0079] Communication system architecture

[0080] Figure 1FIG. 0 is a schematic diagram of the system architecture of the wireless communication system 100 to which the embodiments of the present application can be applied. The wireless communication system 100 may include a network device 110 and a user equipment 120. The network device 110 may be a device that communicates with the user equipment 120. The network device 110 may provide communication coverage for a specific geographical area and may communicate with the user equipment 120 located within the coverage area.

[0081] Figure 1 Exemplarily, one network device and two user equipments are shown. Optionally, the wireless communication system 100 may include multiple network devices and the coverage range of each network device may include other numbers of user equipments, which are not limited in the embodiments of the present application.

[0082] Optionally, the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, etc., which are not limited in the embodiments of the present application.

[0083] It should be understood that although the technical solution of the embodiment of the present application can be used for random access, the technical solution of the embodiment of the present application can also be used for beam failure recovery. Further, the technical solution of the embodiment of the present application can be used for type-1 random access procedure, and the technical solution of the embodiment of the present application can also be used for type-2 random access procedure. Further, the technical solution of the embodiment of the present application can be used for the Uu interface, and the technical solution of the embodiment of the present application can also be used for the PC5 interface. Further, the technical solution of the embodiment of the present application can be used for single-carrier communication, and the technical solution of the embodiment of the present application can also be used for multi-carrier communication. Further, the technical solution of the embodiment of the present application can be used for multi-antenna communication, and the technical solution of the embodiment of the present application can also be used for single-antenna communication. Further, the technical solution of the embodiment of the present application can be used for the scenario between a user equipment and a base station, but the technical solution of the embodiment of the present application is also applicable to the vehicle-to-everything (V2X) scenario, the communication scenarios between a user equipment and a relay, and between a relay and a base station, and achieves similar technical effects in the scenario between a user equipment and a base station. Further, the technical solution of the embodiment of the present application can be applied to various communication scenarios, such as: enhanced mobile broadband (eMBB) scenario, ultra-reliable & low-latency communication (URLLC) scenario, massive machine type communication (mMTC) scenario, etc. In addition, adopting a unified solution for different scenarios helps to reduce hardware complexity and cost.

[0084] It should be understood that the technical solution of the embodiment of the present application can be applied to various communication systems, such as: the 5th generation (5G) system or new radio (NR), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), etc. The technical solution provided by the present application can also be applied to future communication systems, such as the 6th generation mobile communication system, and also to satellite communication systems, etc.

[0085] The user equipment in the embodiments of the present application may also be referred to as a terminal device, an access terminal, a user unit, a user station, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The user equipment in the embodiments of the present application may be a device that provides voice and / or data connectivity to users and can be used to connect people, things, and machines. For example, it can be a handheld device with a wireless connection function, a vehicle-mounted device, etc. The user equipment in the embodiments of the present application may be a mobile phone, a tablet computer (Pad), a laptop computer, a handheld computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a 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 that provides sidelink signals between UEs in V2X or D2D, etc. For instance, a cellular phone and a vehicle communicate with each other using sidelink signals. A cellular phone communicates with a smart home device without relaying the communication signal through a base station.

[0086] The network device in the embodiments of the present application can be a device for communicating with a user equipment. This network device can also be referred to as an access network device or a radio access network device. For example, the network device can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that connects a user equipment to a wireless network. The base station can be broadly covered by various names below, or replaced with the following names, such as: Node B, evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, base band unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or the like, or a combination thereof. The base station can also refer to a communication module, a modem or a chip used in the foregoing device or apparatus. The base station can also be a mobile switching center and a device that undertakes the base station function in device-to-device (D2D), vehicle-to-everything (V2X), machine-to-machine (M2M) communication, a network-side device in a 6G network, a device that undertakes the base station function in a future communication system, etc. The base station can support networks with the same or different access technologies. The embodiments of the present application do not limit the specific technologies and specific device forms adopted by the network device.

[0087] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the position of the mobile base station. In other examples, a helicopter or a drone can be configured to be used as a device for communicating with another base station.

[0088] In some deployments, the network device in the embodiments of the present application may refer to a CU or a DU, or the network device includes a CU and a DU. The gNB may also include an AAU.

[0089] The network device and the user equipment may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they may also be deployed on water; they may also be deployed on aircraft, balloons, and satellites in the air. In the embodiments of the present application, the scenarios where the network device and the user equipment are located are not limited.

[0090] It should be understood that all or part of the functions of the communication device in the present application may also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform).

[0091] Triggering of the random access procedure

[0092] The random access procedure is one of the basic procedures in a communication system. The random access procedure can ensure that when a user equipment enters a cell or needs to reconnect to a cell, it can quickly connect to a network device (such as a base station).

[0093] The random access procedure can include multiple types. For example, the random access procedure can include a contention-based random access procedure and a non-contention-based random access procedure. Or, the random access procedure can include a four-step random access procedure and a two-step random access procedure.

[0094] There are multiple ways to trigger the random access procedure. For example, it can include a random access procedure triggered by a (physical downlink control channel, PDCCH) command (order), a random access procedure triggered by a medium access control (MAC) entity, a random access procedure triggered by a radio resource control (RRC) event, etc. For a detailed description of the triggering methods of the random access procedure, reference can be made to the relevant introduction in Section 38.321 of 3GPP TS.

[0095] PDCCH order triggering is mainly used after uplink out-of-sync. When the network device has downlink data to send, the PDCCH order can be used to force the user equipment to initiate a random access procedure to complete uplink time synchronization; or, PDCCH order triggering can be used to establish time alignment for a secondary timing advance group (STAG).

[0096] In some embodiments, the random access procedure triggered by a PDCCH order may include the following two cases: the contention-based random access procedure triggered by a PDCCH order, and the contention-free random access procedure triggered by a PDCCH order. For example, the random access procedure on the primary secondary cell may be a contention-based random access procedure triggered by a PDCCH order. Or, the random access procedure on the secondary cell may be a contention-free random access procedure triggered by a PDCCH order. This is introduced below with reference to Table 1 and Table 2.

[0097] Table 1

[0098]

[0099] Table 1 shows the information indicated by the network to the terminal device through DCI format 1_0 in the case of a contention-based random access procedure triggered by a PDCCH order. It can be seen from Table 1 that when a PDCCH order triggers a contention-based random access procedure, DCI format 1_0 does not specify any random access resources (such as random access preambles, ROG, etc.), and the user equipment randomly selects random access resources. In this case, it is easy to cause conflicts between the random access procedure and other uplink transmissions.

[0100] As an embodiment, the cyclic redundancy check (CRC) in this DCI format 1_0 is scrambled. For example, the CRC in this DCI format 1_0 is scrambled by a cell radio network temporary identifier (C-RNTI).

[0101] Table 2

[0102]

[0103] Table 2 shows the information indicated by the network to the terminal device through DCI format 1_0 in the case of a contention-free random access procedure triggered by a PDCCH order. It can be seen from Table 2 that when a PDCCH order triggers a contention-free random access procedure, DCI format 1_0 can only specify the RO associated with a specific SS / PBCH block. In some cases, performing PRACH transmission based on this RO may also cause conflicts with other uplink transmissions.

[0104] As an embodiment, the CRC in this DCI format 1_0 is scrambled, for example, scrambled by C-RNTI.

[0105] As an example, when the PDCCH order triggers a non-competitive random access procedure, the PRACH mask indication field in the DCI format 1_0 can only be associated with a specific RO associated with a certain SS / PBCH block. The following gives an example of the correspondence between the PRACH mask indication field in the DCI format 1_0 and the RO associated with a certain SS / PBCH block in combination with Table 3.

[0106] Table 3

[0107] PRACH Mask Indication Field RO Allowed by SS / PBCH block 0 All 1 RO Index 1 2 RO Index 2 3 RO Index 3 4 RO Index 4 5 RO Index 5 6 RO Index 6 7 RO Index 7 8 RO Index 8 9 Each Even RO 10 Each Odd RO 11 Reserved Value 12 Reserved Value 13 Reserved Value 14 Reserved Value 15 Reserved Value

[0108] In the example of Table 3, it can be seen that there is a correspondence between the PRACH mask indication field and the RO associated with a certain SS / PBCH block. In this way, when the user equipment receives the DCI format 1_0, it can determine the corresponding RO according to the value indicated by the PRACH mask indication field in the DCI format 1_0. For example, if the value indicated by the PRACH mask indication field in the DCI format 1_0 received by the user equipment is 0, the user equipment can determine that all ROs can be used for PRACH transmission. Or, if the value indicated by the PRACH mask indication field in the DCI format 1_0 received by the user equipment is 3, the user equipment can determine that the RO corresponding to the RO index 3 can be used for PRACH transmission.

[0109] Coverage enhancement of PRACH transmission

[0110] The coverage performance of a communication system (such as an NR system) is an important factor that needs to be considered by operators when commercially deploying a communication network. This is because the coverage performance of the communication system will directly affect the service quality of the communication system and the costs of the operator, such as the capital expenditure (CAPEX) of the operator and the operating expense (OPEX) of the operator, etc.

[0111] The coverage performance of the communication system will vary with the different frequency bands at which the communication system operates. For example, compared with the LTE system, the NR system operates at a higher frequency band (such as the millimeter wave band), resulting in a greater path loss of the NR system, and thus resulting in relatively worse coverage performance of the NR system. Therefore, as the frequency bands supported by the communication system may become higher and higher, how to enhance the coverage of the communication system has become a problem to be solved.

[0112] In most scenarios of actual deployment, the uplink coverage performance is the bottleneck for enhancing the coverage of the communication system because the capabilities of user equipment are weaker than those of network equipment. With the development of communication technology, the uplink services in some emerging vertical use cases are gradually increasing, such as video uploading services. In scenarios with more uplink services, how to enhance the uplink coverage is a problem that needs to be further solved.

[0113] In the related art, there are already technical solutions for coverage enhancement for some uplinks. For example, NR version 17 (Release 17, Rel-17) has designed coverage enhancement solutions for the physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH) and message 3 (Msg3) in the random access process.

[0114] However, Rel-17 does not design a coverage enhancement solution for PRACH, but PRACH transmission (PRACHtransmission,

[0115] The performance of PRACH transmission is very important for many processes such as initial access and beam failure recovery. Therefore, it is also very important to enhance the coverage of PRACH. Based on this, through the 3rd generation partnership project (3GPP) RP-221858, Rel-18 formally established the work item (WI) of "further NR coverage enhancements", among which enhancing the coverage performance of PRACH transmission is one of the important topics of this work item.

[0116] As a possible implementation, multiple PRACH transmissions can be used to enhance the coverage of PRACH transmissions. That is to say, the coverage enhancement of PRACH transmissions can be achieved by repeating the PRACH transmissions (for example, sending the preamble in the PRACH multiple times). It should be noted that in this application, multiple PRACH transmissions can also be replaced by terms such as multi-PRACH transmissions, multiple PRACH transmissions, multi-PRACH transmissions, complex PRACH transmissions, PRACH repeated transmissions, Type-3 Random Access Procedure, etc. The embodiments of this application are not limited thereto. That is to say, any of the multiple PRACH transmissions mentioned in this application can be replaced by at least one of multi-PRACH transmissions, multiple PRACH transmissions, multi-PRACH transmissions, complex PRACH transmissions, PRACH repeated transmissions, and Type-3 Random Access Procedure.

[0117] In the embodiments of this application, multiple PRACH transmissions may refer to multiple PRACH transmissions using the same beam, or may refer to multiple PRACH transmissions using different beams. Taking multiple PRACH transmissions using the same beam as an example, the 3GPP Radio Access Network (RAN) 1#110bis-e meeting has reached an agreement: PRACH opportunities (or RACH opportunities) located at least in different time instances (or time points, time instances, etc.) can be used for multiple PRACH transmissions using the same beam. Or rather, the Physical Random Access Channel occasion group (PRACH occasion group, ROG) can be used for multiple PRACH transmissions using the same beam.

[0118] In addition, the 3GPP RAN1#110bis-e meeting further defines the number of multiple PRACH transmissions using the same beam (the number of multi-PRACH transmissions / repetition factor), which can include at least 2, 4, and 8. That is to say, a ROG can include 2, 4, or 8 valid Physical Random Access Channel occasions (PRACH occasions, ROs). The ROG will be further introduced below.

[0119] Physical Random Access Channel occasion group

[0120] In some scenarios, a ROG is introduced to indicate a set that includes multiple Physical Random Access Channel occasions (PRACH occasions, ROs). Therefore, the ROG can also be referred to as an "RO set". The embodiments of the present application do not limit the name of the ROG. For ease of description, the embodiments of the present application are introduced based on the ROG. The embodiments of the present application do not limit the name of the Physical Random Access Channel occasion. For example, the Physical Random Access Channel occasion can also be referred to as a random access occasion, or it can also be referred to as a transmission occasion, etc. For ease of description, the embodiments of the present application are described based on the Physical Random Access Channel occasion, and the Physical Random Access Channel occasion mentioned in the embodiments of the present application and the random access occasion can be replaced with each other.

[0121] As an embodiment, the ROG can be used for multiple PRACH transmissions using the same beam.

[0122] As an embodiment, the ROG can include ROs corresponding to multiple PRACHs transmitted using the same beam.

[0123] As an embodiment, in some meetings (e.g., 3GPP RAN1#110bis-e), it is also being discussed that ROs located in different time instances can be used for multiple PRACH transmissions using the same beam. That is, multiple ROs in a ROG can be located in different time periods.

[0124] As an embodiment, for a specific number of PRACH transmissions, a ROG includes valid ROs, which helps the specific number of PRACHs to be transmitted through the valid ROs.

[0125] As an embodiment, all ROs in a ROG can be associated with a synchronization signal block (or, synchronization signal / physical broadcast channel block, SS / PBCH block, SSB). For simplicity, the synchronization signal block or the synchronization signal / physical broadcast channel block will be referred to as SS / PBCH hereinafter, and it can be replaced with SS / PBCH block or SSB arbitrarily. Of course, in the embodiments of the present application, a ROG can be associated with multiple SS / PBCHs.

[0126] It can be seen that in the scenario of multiple PRACH transmissions, multiple PRACHs can be sent on the ROG. Then, how to determine the ROG corresponding to multiple PRACH transmissions is a problem to be solved. For example, how to determine on which ROG or which ROGs to perform multiple PRACH transmissions. Or, how to determine which ROG or which ROGs cannot be used for multiple PRACH transmissions to avoid conflicts with other transmissions, etc.

[0127] In view of the above problems, the present application provides a method and an apparatus for use in a node for wireless communication. When a first node corresponds to multiple ROGs, embodiments of the present application can use a second signaling to indicate at least one ROG among the multiple ROGs, so that the first node determines the ROG corresponding to multiple PRACH transmissions according to the indication of the second signaling.

[0128] The present application can be applied to scenarios of multiple PRACH transmissions, that is, multiple PRACH retransmissions can be used to achieve coverage enhancement of PRACH.

[0129] The present application can be applied to various random access procedures. As an embodiment, embodiments of the present application can be applied to a four-step random access procedure. As another embodiment, embodiments of the present application can be applied to a two-step random access procedure. As an embodiment, embodiments of the present application can be applied to a contention-based random access procedure. As another embodiment, embodiments of the present application can be applied to a non-contention-based random access procedure.

[0130] The present application can be applied to random access procedures triggered by different triggering methods. As an embodiment, embodiments of the present application can be applied to a random access procedure triggered by a PDCCH order. As another embodiment, embodiments of the present application can be applied to a random access procedure triggered by a MAC entity. As yet another embodiment, embodiments of the present application can be applied to a random access procedure triggered by an RRC event.

[0131] As an embodiment, the multiple PRACH transmissions mentioned in the present application may refer to multiple PRACH transmissions using the same beam, so as to obtain a signal-to-noise ratio (SNR) gain by repeating multiple PRACHs on the same beam.

[0132] As an embodiment, the multiple PRACH transmissions mentioned in the present application may refer to multiple PRACH transmissions using different beams, so as to obtain a diversity gain by repeating multiple PRACHs on different beams.

[0133] The method and apparatus provided by the present application are illustrated by multiple embodiments or examples below. It should be understood that, without conflict, the embodiments in the first node of the present application and the features in the embodiments can be applied to the second node, and vice versa. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

[0134] Figure 2 It is a schematic flow chart of a method for use in a node for wireless communication provided by an embodiment of the present application.Figure 2 The method shown can be executed by a first node. First, a brief introduction to the first node will be given below.

[0135] As an embodiment, the first node can be any type of node in a communication system that can perform multiple PRACH transmissions on the ROG.

[0136] As an embodiment, the first node can be a user equipment. For example, the first node can be Figure 1 the user equipment 120 shown.

[0137] As an embodiment, the first node can be a network-controlled repeater (NCR).

[0138] As an embodiment, the first node can be a relay, such as a relay terminal.

[0139] As an embodiment, the first node can include one or more receivers. For example, the first node can include a receiver, and the receiver can receive various signaling or data. Or, the first node can include multiple receivers, and the multiple receivers can respectively receive different signaling or data.

[0140] As a sub-embodiment of the above embodiment, the first node can include a first receiver and a second receiver.

[0141] As an embodiment, the first node can further include a transmitter. For example, the first node can further include a first transmitter.

[0142] Next, an introduction to Figure 2 the method shown will be given. Refer to Figure 2 , Figure 2 the method shown can include step S210 and step S220.

[0143] In step S210, a first signaling is received.

[0144] As an embodiment, the first signaling is used to determine multiple ROGs. Or rather, the first signaling is used to configure multiple ROGs.

[0145] As an embodiment, the multiple ROGs determined by the first signaling can be used by the first node for multiple PRACH transmissions.

[0146] As an embodiment, any one of the multiple ROGs includes multiple ROs.

[0147] As an embodiment, multiple ROs included in any one of the multiple ROGs can be used to perform multiple PRACH transmissions. Or rather, multiple PRACH transmissions can be performed on multiple ROs included in any one of the multiple ROGs.

[0148] As an embodiment, the multiple PRACH transmissions correspond to one random access attempt (PRACH attempt).

[0149] As an embodiment, the multiple PRACH transmissions are used for one random access attempt.

[0150] As an embodiment, the multiple PRACH transmissions include respectively sending multiple random access preambles on the one random access attempt.

[0151] As an embodiment, multiple ROs included in any one of the multiple ROGs can be used to send multiple random access preambles. Or rather, multiple random access preambles can be respectively sent on multiple ROs.

[0152] As an embodiment, the first signaling is received by the first node through the first receiver.

[0153] As an embodiment, the first signaling is sent by a second node to the first node.

[0154] As an embodiment, the second node may be a network device. However, the embodiments of the present application are not limited thereto. For example, the first signaling may be sent by a node other than the second node.

[0155] As an embodiment, the first signaling is high-layer signaling or higher-layer signaling.

[0156] As an embodiment, the first signaling is RRC layer signaling.

[0157] As an embodiment, the first signaling is MAC layer signaling.

[0158] In step S220, receive second signaling.

[0159] As an embodiment, the second signaling is used to indicate the value of a first index. The value of the first index corresponds to at least one ROG among the multiple ROGs. Or rather, the value of the first index corresponds to one or more ROGs among the multiple ROGs.

[0160] The embodiments of the present application do not specifically limit the implementation manner of the second signaling indicating the value of the first index. The implementation manner of the second signaling indicating the value of the first index will be introduced in combination with specific embodiments later. For the sake of brevity, it will not be elaborated here.

[0161] As an embodiment, at least one ROG corresponding to the value of the first index can be used by the first node to perform multiple PRACH transmissions. That is to say, the second signaling can be used to indicate to the first node the ROGs for multiple PRACH transmissions.

[0162] As an embodiment, at least one ROG corresponding to the value of the first index can be forbidden to be used by the first node to perform multiple PRACH transmissions. That is to say, the second signaling can be used to indicate to the first node the ROGs forbidden for multiple PRACH transmissions. It should be understood that in some embodiments, at least one ROG corresponding to the value of the first index being forbidden to be used by the first node to perform multiple PRACH transmissions can also be replaced by at least one of the following: at least one ROG corresponding to the value of the first index cannot be used by the first node to perform multiple PRACH transmissions; at least one ROG corresponding to the value of the first index should be avoided being used by the first node to perform multiple PRACH transmissions.

[0163] The embodiments of the present application do not specifically limit the implementation manner of the value of the first index. The implementation manner of the value of the first index will be exemplarily introduced in combination with specific embodiments later. For the sake of brevity, it will not be elaborated here.

[0164] As an embodiment, the at least one ROG corresponding to the value of the first index is associated with the same SS / PBCH.

[0165] As an embodiment, the at least one ROG corresponding to the value of the first index is associated with the same SS / PBCH index.

[0166] As an embodiment, the second signaling is received by the first node through the second receiver.

[0167] As an embodiment, the second signaling is sent by a second node to the first node.

[0168] As an embodiment, the second node can be a network device. However, the embodiments of the present application are not limited thereto. For example, the first signaling can be sent by other nodes other than the second node.

[0169] As an embodiment, the node that sends the second signaling and the node that sends the first signaling can be the same node. For example, the first signaling and the second signaling can be sent by the same network device.

[0170] As an embodiment, the second signaling includes a downlink control information (DCI).

[0171] As an embodiment, the second signaling is a DCI.

[0172] As an embodiment, the second signaling is carried on a DCI.

[0173] As an embodiment, when the second signaling includes a DCI, the embodiments of the present application do not specifically limit the format of the DCI. Exemplarily, as an embodiment, the second signaling includes DCI format 1_0. Of course, the present application is not limited thereto, and the second signaling may include DCIs in other formats.

[0174] As an embodiment, the second signaling is DCI format 1_0.

[0175] As an embodiment, the second signaling is carried on DCI format 1_0.

[0176] As an embodiment, the second signaling includes a CRC.

[0177] As an embodiment, the CRC in the second signaling is scrambled. For example, the CRC in the second signaling is scrambled by a C-RNTI.

[0178] As an embodiment, the second signaling includes a high-layer signaling or a higher-layer signaling.

[0179] As an embodiment, the second signaling includes an RRC layer signaling.

[0180] As an embodiment, the second signaling is an RRC layer signaling.

[0181] As an embodiment, the second signaling is carried on an RRC layer signaling.

[0182] As an embodiment, the second signaling includes a MAC layer signaling.

[0183] As an embodiment, the second signaling is a MAC layer signaling.

[0184] As an embodiment, the second signaling is carried on a MAC layer signaling.

[0185] In the embodiments of the present application, when multiple ROGs are configured in the first node, the embodiments of the present application can use a second signaling to indicate the value of a first index, so as to indicate at least one ROG among the multiple ROGs through the value of the first index, thereby facilitating the first node to determine the ROG corresponding to multiple PRACH transmissions according to the indication of the second signaling.

[0186] As described above, in some embodiments, at least one ROG corresponding to the value of the first index can be used by the first node to perform multiple PRACH transmissions. In some embodiments, at least one ROG corresponding to the value of the first index can be prohibited from being used by the first node to perform multiple PRACH transmissions. Two embodiments will be introduced below respectively.

[0187] Embodiment 1: At least one ROG corresponding to the value of the first index is used to perform multiple PRACH transmissions

[0188] Figure 3 It is a schematic flow chart of a method in a node for wireless communication provided in another embodiment of the present application. Figure 3 The method shown can be executed by a first node. For the relevant introduction of the first node, reference can be made to the foregoing, and details will not be repeated here. Figure 3 The method shown may include step S310 to step S330.

[0189] In step S310, a first signaling is received. The first signaling can be used to determine multiple ROGs.

[0190] In step S320, a second signaling is received. The second signaling can be used to indicate the value of a first index, and the value of the first index corresponds to at least one ROG among the multiple ROGs.

[0191] For the detailed introduction of step S310 and step S320, reference can be made to the introduction of step S210 and step S220 above. For the sake of brevity, details will not be repeated here.

[0192] In step S330, multiple PRACHs are sent on a target ROG.

[0193] As an embodiment, the target ROG is one of the at least one ROG corresponding to the value of the first index. In this way, the embodiments of the present application can accurately indicate the ROG for multiple PRACH transmissions, or rather, the embodiments of the present application can accurately indicate multiple ROs for multiple PRACH transmissions, so as to be better applied to the scenario of multiple PRACH transmissions.

[0194] As an example, the at least one ROG corresponding to the value of the first index is allowed to be used for multiple PRACH transmissions. As a specific example, the multiple ROGs determined by the first signaling include a first ROG, a second ROG, and a third ROG. If the at least one ROG corresponding to the value of the first index is the first ROG, then the first ROG can be allowed to be used for multiple PRACH transmissions. Or rather, the first ROG can be used by the first node for the current multiple PRACH transmissions. In this way, the first node can determine the ROG or multiple ROs corresponding to multiple PRACH transmissions according to the second signaling (the value of the first index), which further helps to avoid the problem of uplink transmission conflicts caused by using other ROGs for multiple PRACH transmissions.

[0195] As an example, the multiple PRACH transmissions are triggered by a PDCCH order.

[0196] As an example, the multiple PRACH transmissions are triggered by a higher layer. For example, the multiple PRACH transmissions are triggered by an RRC layer event. Or, the multiple PRACH transmissions are triggered by a MAC entity.

[0197] Embodiment 2: At least one ROG corresponding to the value of the first index is prohibited from performing multiple PRACH transmissions

[0198] As an example, the first node can use any one or more of the multiple ROGs determined by the first signaling for multiple PRACH transmissions. Or rather, the first node can randomly select one or more ROGs from the multiple ROGs determined by the first signaling for multiple PRACH transmissions. However, there are many types of uplink transmissions, and in many cases, conflicts will occur between multiple uplink transmissions. In addition, considering that sidelink transmissions and uplink transmissions can use the same resources (such as frequency domain resources, time domain resources, etc.) for transmission, conflicts may also occur between uplink transmissions and sidelink transmissions. Therefore, when randomly selecting one or more ROGs from multiple ROGs for multiple PRACH transmissions, the probability of conflicts occurring between multiple uplink transmissions or the probability of conflicts occurring between uplink transmissions and sidelink transmissions may increase.

[0199] For ease of understanding, before introducing the solution of Embodiment 2, the situation of conflicts occurring between multiple uplink transmissions will be introduced in detail.

[0200] The types of uplink transmissions can include multiple types. For example, it can include one or more of the following transmissions: PRACH transmission (such as single PRACH transmission, multiple PRACH transmissions), PUSCH transmission, PUCCH transmission, sounding reference signal (SRS) transmission, etc.

[0201] In many cases, conflicts may occur between the above multiple uplink transmissions. For example, when multiple uplink transmissions overlap in the time domain, it may lead to conflicts between multiple uplink transmissions. Another example is that when the power allocated to multiple uplink transmissions by the user equipment at a transmission occasion exceeds the maximum transmit power value of the user equipment, it may lead to conflicts between multiple uplink transmissions. Another example is that due to reasons such as power allocation exceeding the limit caused by dual connectivity, slot format determination, the transmission occasions of multiple uplink transmissions being at the same time domain resource position (such as the same time slot), and the gap between multiple uplink transmissions being too small, etc., all may lead to conflicts between multiple uplink transmissions. In this case, the user equipment may need to abandon sending some uplink transmissions or reduce the transmit power of some uplink transmissions at the transmission occasion where the conflict occurs. For example, the user equipment may need to abandon sending the PRACH or reduce the transmit power of the PRACH at the transmission occasion where the conflict occurs.

[0202] For the scheme of multiple PRACH transmissions, it is necessary to send multiple PRACHs on multiple ROs. Therefore, in the case of adopting multiple PRACH transmissions, the probability of conflicts between multiple PRACH transmissions and other uplink transmissions or sidelink transmissions is greater. The following will be introduced in combination with Figure 4 this.

[0203] Figure 4 This is an example of a conflict between multiple PRACH transmissions and other transmissions (such as other uplink transmissions). As Figure 4 shown, multiple PRACH transmissions may be transmitted on multiple ROs (such as RO#0 to RO#7 in the figure). On some of these ROs, conflicts may occur due to overlapping with other uplink transmissions (such as other uplink transmission 1 in the figure) in the time domain; on some of these ROs, conflicts may occur due to the gap between it and other uplink transmissions (such as other uplink transmission 2 in the figure) being too small.

[0204] In summary, since the ROGs occupied by multiple PRACH transmissions in a single random access attempt include multiple ROs, especially some ROGs include up to 8 ROs, the probability of multiple PRACH transmissions conflicting with other uplink transmissions or sidelink transmissions is significantly increased, and a single random access attempt may conflict with multiple other uplink transmissions or sidelink transmissions.

[0205] In some cases, if the resources of the ROG are network-configured, when multiple PRACH transmissions frequently conflict with other uplink transmissions or sidelink transmissions, the UE may abandon all or part of the PRACH transmissions. In this way, the user equipment may need to frequently occupy additional ROGs to retransmit the PRACH to re-perform random access. Therefore, multi-PRACH transmission consumes more serious system resources than single-PRACH transmission and results in an extended access delay of the user equipment.

[0206] In some cases, the network may assign the highest priority to multiple PRACH transmissions on the primary cell (PCell), but multiple PRACH transmissions on non-primary cells still face the risk of being abandoned or dropped. For example, multiple PRACH transmissions on the primary secondary cell (PSCell) and other secondary cells (SCell) still face the risk of being abandoned or dropped.

[0207] That is to say, in the scenario of multiple PRACH transmissions, one or more of the following problems may occur: considering that multiple PRACH transmissions occupy multiple time periods, the probability of multiple PRACH transmissions conflicting with other transmissions is higher, which has a greater impact on system performance; multiple PRACH transmissions conflicting with other transmissions may lead to an extended random access delay; the performance of multiple PRACH transmissions is poor, resulting in PRACH transmission becoming a bottleneck in the coverage of the communication system.

[0208] To address the above problems, the embodiment of the present application proposes the solution of Embodiment 2 to optimize the solution for multiple PRACH transmissions conflicting with other transmissions and reduce the impact on system performance; or, improve the performance gain of multiple PRACH transmissions and increase the coverage; or, reduce the random access delay and improve the utilization efficiency of random access resources. The solution of Embodiment 2 will be introduced in detail below.

[0209] Refer back to Figure 3, in step S330, the first node sends multiple PRACHs on the target ROG. As an embodiment, the target ROG is one of the multiple ROGs determined by the first signaling, excluding at least one ROG corresponding to the value of the first index. That is to say, the target ROG is determined from the multiple ROGs determined by the first signaling, but the target ROG cannot be at least one ROG corresponding to the value of the first index.

[0210] As an embodiment, at least one ROG corresponding to the value of the first index is prohibited from being used for multiple PRACH transmissions. As a specific example, the multiple ROGs determined by the first signaling include a first ROG, a second ROG, and a third ROG, and at least one ROG corresponding to the value of the first index is the first ROG, then the first ROG is prohibited (which can be replaced by avoided or cannot) from being used for multiple PRACH transmissions. Or rather, the first ROG cannot be used by the first node for this multiple PRACH transmission. In this way, the first node can determine, according to the second signaling (the value of the first index), on which ROG or ROGs multiple PRACH transmissions cannot be sent, which is beneficial to avoiding conflicts between multiple PRACH transmissions and other transmissions (such as uplink transmissions and sidelink transmissions), or reducing the probability of conflicts between multiple PRACH transmissions and other transmissions.

[0211] As an embodiment, the multiple PRACH transmissions are triggered by a PDCCH order.

[0212] As an embodiment, the multiple PRACH transmissions are triggered by a higher layer. For example, the multiple PRACH transmissions are triggered by an RRC layer event. Or, the multiple PRACH transmissions are triggered by a MAC entity.

[0213] The first index and the value of the first index will be introduced in detail below.

[0214] As an embodiment, the first index is used to indicate an ROG or an RO included in the ROG. For example, the first index can be used to indicate one or more ROGs, or can be used to indicate multiple ROs included in one or more ROGs.

[0215] As an embodiment, the first index is an ROG mask index.

[0216] As an embodiment, the first index is an RO mask index.

[0217] As an example, the first index is used to indicate the number of ROs. For example, the first index can be used to indicate the number of ROs included in one ROG; alternatively, the first index can be used to indicate the number of ROs used for multiple PRACH transmissions; or, the first index can be used to indicate the number of ROs prohibited from being used for multiple PRACH transmissions.

[0218] As an example, the value of the first index is one of a plurality of non - negative integers, and the plurality of non - negative integers respectively correspond to a plurality of ROG subsets one by one.

[0219] As an example, any one of the plurality of ROG subsets includes at least one ROG among the plurality of ROGs. That is to say, any one of the plurality of ROG subsets includes at least one ROG among the plurality of ROGs determined by the first signaling.

[0220] As an example, a certain ROG subset among the plurality of ROG subsets can include one ROG among the plurality of ROGs. For example, the plurality of ROGs include a first ROG, a second ROG, and a third ROG, and a certain ROG subset among the plurality of ROG subsets can only include the first ROG.

[0221] As an example, a certain ROG subset among the plurality of ROG subsets can include a plurality of ROGs among the plurality of ROGs. For example, the plurality of ROGs include a first ROG, a second ROG, and a third ROG, and a certain ROG subset among the plurality of ROG subsets can include the first ROG and the second ROG.

[0222] As an example, the value of the first index corresponds to a first ROG subset. Among them, the first ROG subset is one of the plurality of ROG subsets.

[0223] As an example, the first ROG subset only includes one ROG.

[0224] As an example, the first ROG subset only includes the first ROG.

[0225] As an example, the first ROG subset is the first ROG.

[0226] As an example, the first ROG subset includes a plurality of ROGs. For example, it includes a plurality of ROGs among the plurality of ROGs determined by the first signaling.

[0227] As an example, at least one ROG included in at least one ROG subset among the plurality of ROG subsets is allowed to be used for multiple PRACH transmissions.

[0228] As an example, at least one ROG included in at least one ROG subset corresponding to the value of the first index is allowed to be used for multiple PRACH transmissions. For example, if the value of the first index corresponds to a first ROG subset, at least one ROG included in the first ROG subset is allowed to be used for multiple PRACH transmissions.

[0229] As an example, at least one ROG included in at least one ROG subset among the multiple ROG subsets is prohibited from being used for multiple PRACH transmissions.

[0230] As an example, at least one ROG included in at least one ROG subset corresponding to the value of the first index is prohibited from being used for multiple PRACH transmissions. For example, if the value of the first index corresponds to a second ROG subset, at least one ROG included in the second ROG subset is prohibited from being used for multiple PRACH transmissions.

[0231] As an example, at least one ROG included in some of the ROG subsets among the multiple ROG subsets is allowed to be used for multiple PRACH transmissions, and at least one ROG included in some other ROG subsets among the multiple ROG subsets is prohibited from being used for multiple PRACH transmissions.

[0232] In other words, at least one ROG included in at least one ROG subset (for example, the first ROG subset) among the multiple ROG subsets is allowed to be used for multiple PRACH transmissions, and at least one ROG included in at least one ROG subset (for example, the second ROG subset) among the multiple ROG subsets is prohibited from being used for multiple PRACH transmissions.

[0233] As an example, any one of the ROG subsets among the multiple ROG subsets is associated with the same SS / PBCH.

[0234] As an example, any one of the ROG subsets among the multiple ROG subsets is associated with the same SS / PBCH index.

[0235] As an example, a third signaling is used to configure the correspondence between the multiple non-negative integers and the multiple ROG subsets.

[0236] As an example, the third signaling is sent by a second node. The second node can be, for example, a network device or other nodes outside the network device.

[0237] As an example, the third signaling can be a high-layer signaling or a higher-layer signaling. For example, the third signaling can include RRC layer signaling, or the third signaling can include MAC layer signaling.

[0238] As an embodiment, the corresponding relationship between the plurality of non - negative integers and the plurality of ROG subsets may be pre - configured, for example, pre - configured by a network.

[0239] As mentioned above, there are various ways to implement the value of the first index. The following gives exemplary ways to implement the value of the first index.

[0240] Implementation Method 1: The value of the first index is used to indicate the ROG index

[0241] As an embodiment, the value of the first index corresponds to a first ROG index, and the first ROG index is used to determine a first ROG from the plurality of ROGs. Or rather, the value of the first index is used to indicate the first ROG index, and the first ROG index is used to determine a first ROG from the plurality of ROGs (the plurality of ROGs determined by the first signaling).

[0242] As an embodiment, the value of the first index corresponds to at least one ROG index, or rather, the value of the first index corresponds to one or more ROG indexes.

[0243] As an embodiment, the value of the first index corresponds to one ROG index. For example, the value of the first index corresponds to a first ROG index.

[0244] As an embodiment, the value of the first index corresponds to a plurality of ROG indexes. For example, the value of the first index corresponds to a first ROG index and a second ROG index.

[0245] As an embodiment, any one of the plurality of ROG indexes is used to determine a ROG from the plurality of ROGs. Or rather, any one of the plurality of ROG indexes is used to determine a ROG from the plurality of ROGs determined by the first signaling. For example, the value of the first index corresponds to a first ROG index and a second ROG index, the first ROG index can be used to determine a first ROG, and the second ROG index can be used to determine a second ROG.

[0246] Implementation Method 2: The value of the first index is used to indicate the number of ROs

[0247] As an embodiment, the value of the first index corresponds to a first number of timing instants, and the number of ROs included in at least one ROG among the plurality of ROGs is equal to the first number of timing instants.

[0248] As an embodiment, the first number of timing instants is equal to one of {2, 4, 8}.

[0249] As an example, the number of the first timings is equal to the number of ROs included in the first ROG. That is, if the value of the first index is intended to indicate the first ROG, the value of the first index can be determined as the number of ROs included in the first ROG.

[0250] As an example, the value of the first index may include the number of ROs and other information. For example, the value of the first index can be used to indicate an RO index and the number of ROs to indicate at least one ROG among a plurality of ROGs.

[0251] Implementation Method 3: The value of the first index is used to indicate the ROG index

[0252] As an example, the value of the first index corresponds to a first RO index, and the first RO index is used to determine a first RO from among the ROs included in the plurality of ROGs.

[0253] As an example, the first RO is used to determine the first ROG.

[0254] As an example, the first RO and the number of the first timings are jointly used to determine the first ROG.

[0255] As an example, any one of the ROs included in the plurality of ROGs belongs to one of the plurality of ROGs.

[0256] As an example, the ROs included in the plurality of ROGs belong to different ROGs.

[0257] As an example, the ROs included in the plurality of ROGs belong to the same ROG.

[0258] As an example, any one of the ROs included in the plurality of ROGs is one of the ROs included in one of the ROGs among the plurality of ROGs.

[0259] As an example, the plurality of ROGs respectively include a plurality of ROs.

[0260] As an example, any one of the plurality of ROGs includes a plurality of ROs.

[0261] As an example, the first RO belongs to the first ROG.

[0262] As an example, the first RO is one of the ROs included in the first ROG.

[0263] As an example, the first RO is the first RO among the ROs included in the first ROG.

[0264] As an example, the first RO is the last RO among the multiple ROs included in the first ROG.

[0265] It should be noted that the implementation methods of the values of the above-listed first indexes can be used alone or combined arbitrarily, and the embodiments of the present application do not limit this. For example, the ROG index can be used alone as the value of the first index. Or, the number of ROs can be used alone as the value of the first index. Or, the ROG index and the number of ROs can be used as the value of the first index. Or, the RO index and the number of ROs can be used as the value of the first index, and so on.

[0266] As mentioned above, the second signaling can be used to indicate the value of the first index. For ease of understanding, the implementation method of the second signaling indicating the value of the first index will be introduced below.

[0267] As an example, the second signaling includes multiple indication fields, and at least one of the multiple indication fields is used to indicate the value of the first index.

[0268] The embodiments of the present application do not limit the multiple indication fields included in the second signaling. As an example, the multiple indication fields include at least two of the following: uplink / supplementary uplink indicator (UL / SUL indicator) field, SS / PBCH index field, first index field, and reserved bits field.

[0269] As an example, when the second signaling includes DCI or the second signaling includes DCI format 1_0, the multiple indication fields include at least two of the following: UL / SUL indicator field, SS / PBCH index field, first index field, and reserved field.

[0270] As an example, the first index field may refer to the ROG mask index field.

[0271] As an example, the first index field may be the RO mask index field.

[0272] As an example, the first index field can be used to indicate at least one ROG among the multiple ROGs. In this case, the first index field can be used to indicate one or more ROGs, and the one or more ROGs indicated by the first index field can be associated with any SS / PBCH block. In addition, the one or more ROGs indicated by the first index field are allowed to be used for multiple PRACH transmissions, or the one or more ROGs indicated by the first index field are prohibited from being used for multiple PRACH transmissions.

[0273] As an example, the SS / PBCH index field and the first index field can be jointly used to indicate at least one ROG among the multiple ROGs. In this case, the first index field can be used to indicate one or more ROGs associated with the SS / PBCH index indicated by the SS / PBCH index field, and the one or more ROGs associated with the SS / PBCH index indicated by the first index field are allowed to be used for multiple PRACH transmissions, or the one or more ROGs associated with the SS / PBCH index indicated by the first index field are prohibited from being used for multiple PRACH transmissions.

[0274] As an example, the multiple indication fields included in the second signaling may further include other indication fields other than the indication fields listed above. For example, the multiple indication fields included in the second signaling include at least two of the following: second signaling format identification field, frequency domain resource assignment field, random access preamble index field, UL / SUL indicator field, SS / PBCH index field, first index field, and reserved field.

[0275] As an example, when the second signaling includes DCI or the second signaling includes DCI format 1_0, the multiple indication fields include at least two of the following: DCI format identification field, frequency domain resource assignment field, random access preamble index field, UL / SUL indicator field, SS / PBCH index field, first index field, and reserved field.

[0276] As an example, the value of the DCI format identification field is 1.

[0277] As an example, the value of the frequency domain resource assignment field is all 1s.

[0278] As an example, the value of the random access preamble index field is all 0s.

[0279] As an example, the value of the frequency domain resource assignment field is all 1s, and the value of the random access preamble index field is all 0s.

[0280] As an example, the value of the UL / SUL indicator field is a reserved value.

[0281] As an example, the value of the SS / PBCH index field is one of 0 - 63.

[0282] As an example, the value of the first index field is one of 0 - 10.

[0283] As an example, the value of the SS / PBCH index field is one of 0 - 63, and the value of the first index field is one of 0 - 10.

[0284] As an example, the value of the SS / PBCH index field is a reserved value.

[0285] As an example, the value of the SS / PBCH index field is a reserved value, and the value of the first index field is one of 0 - 10.

[0286] For ease of understanding, the solutions of the embodiments of the present application will be introduced below in conjunction with several specific examples. It should be noted that the following examples are not used to limit the solutions of the embodiments of the present application. It should also be noted that the following examples are introduced by taking the random access process triggered by the PDCCH order as an example, but the embodiments of the present application are not limited thereto, and the present application can also be applied to random access processes triggered by other methods.

[0287] Example 1:

[0288] When the PDCCH order triggers a random access process for multiple PRACH transmissions based on contention, at least one of the UL / SUL indicator field, SS / PBCH index field, PRACH mask index field, and reserved field in the second signaling (such as DCI format1_0) is used to indicate the ROG that is prone to conflicts. After receiving the ROG indicated by the second signaling, the first node will randomly select a random access resource from other random access resources excluding this ROG for performing the random access process of multiple PRACH transmissions.

[0289] As an example, the SS / PBCH index field and the PRACH mask index field in the second signaling are jointly used to indicate the ROG that is prone to conflicts, or rather, the SS / PBCH index field and the PRACH mask index field in the second signaling are jointly used to indicate the ROG prohibited for multiple PRACH transmissions.

[0290] As an implementation manner, the SS / PBCH index field in the second signaling is used to indicate an SS / PBCH index, and the PRACH mask index field is used to indicate a specific ROG associated with this SS / PBCH index. The specific ROG associated with this SS / PBCH index cannot be used by the user equipment to send multiple PRACH transmissions.

[0291] For ease of understanding, an example of the SS / PBCH index field and the PRACH mask index field in the second signaling jointly indicating the ROG that is prone to conflicts is given below in conjunction with Table 4.

[0292] Table 4

[0293]

[0294]

[0295] As an example, the PRACH mask index field in the second signaling is used to indicate the ROGs that are prone to collisions. Or rather, the PRACH mask index field in the second signaling is used alone to indicate the ROGs that are prone to collisions or is used alone to indicate the ROGs prohibited for multiple PRACH transmissions.

[0296] As an implementation, only the PRACH mask index field in the second signaling is used to indicate a specific ROG, and the specific ROG associated with any SS / PBCH block cannot be selected by the user equipment for multiple PRACH transmissions.

[0297] For ease of understanding, an example in which the PRACH mask index field in the second signaling is used alone to indicate the ROGs that are prone to collisions is given below with reference to Table 5.

[0298] Table 5

[0299]

[0300] Example 2:

[0301] Considering that when the PDCCH order triggers a non-competitive random access procedure, the PRACH mask indication field in the traditional DCI format 1_0 can only indicate a specific RO associated with a certain SS / PBCH block. That is to say, the PRACH mask indication field in the traditional DCI format 1_0 cannot accurately indicate multiple ROs for multiple PRACH transmissions.

[0302] In order to accurately indicate multiple ROs for multiple PRACH transmissions, in the embodiments of the present application, one or more indication fields in the second signaling can be used to accurately indicate the ROG or accurately indicate multiple ROs.

[0303] As an example, the ROG or multiple ROs accurately indicated by one or more indication fields in the second signaling are allowed for multiple PRACH transmissions.

[0304] As an example, the ROG or multiple ROs accurately indicated by one or more indication fields in the second signaling are prohibited for multiple PRACH transmissions.

[0305] There are multiple ways to implement the second signaling to indicate the ROG or multiple ROs. For example, only the ROG index can be indicated, or the combination of the index of the first RO among multiple ROs and the number of ROs can be indicated. Or, only the number of ROs can be indicated, etc. For details, please refer to the previous introduction.

[0306] As an example, the indication (such as ROG, multiple ROs) corresponding to the value of the indication field of the ROG or multiple ROs used for precise indication in the second signaling (such as the multiple non - negative integers mentioned above, and the value of the first index belongs to one of the values of this indication field) can be configured through higher - layer signaling (for example, RRC - layer signaling). The following combines Figures 5 to 10 , taking the second signaling using the PRACH mask index indication field to indicate the ROG or multiple ROs as an example, to introduce the indication corresponding to the value of the PRACH mask index indication field.

[0307] Figure 5 shows an example of the indication corresponding to the value of a PRACH mask index indication field. In Figure 5 's example, the ROG (for example, one or more ROGs) or multiple ROs corresponding to the value of the PRACH mask index indication field are allowed to be used for multiple PRACH transmissions. In Figure 5 's example, the value of the PRACH mask index indication field corresponds to the ROG index, or the ROG or multiple ROs corresponding to the value of the PRACH mask index indication field are indicated using the ROG index.

[0308] As an example, the value of the PRACH mask index indication field is used to indicate at least one ROG index.

[0309] As an example, the value of the PRACH mask index indication field is used to indicate one ROG index.

[0310] As an example, the value of the PRACH mask index indication field is used to indicate at least one ROG index allowed for multiple PRACH transmissions.

[0311] As an example, the value of the PRACH mask index indication field is used to indicate one ROG index allowed for multiple PRACH transmissions.

[0312] Figure 6 shows another example of the indication corresponding to the value of a PRACH mask index indication field. In Figure 6 's example, the ROG (for example, one or more ROGs) or multiple ROs corresponding to the value of the PRACH mask index indication field are allowed to be used for multiple PRACH transmissions. In Figure 6In the example, the value of the PRACH mask index indication field corresponds to the RO index and the number of ROs, or the ROG or multiple ROs corresponding to the value of the PRACH mask index indication field are indicated by the RO index and the number of ROs.

[0313] As an embodiment, the value of the PRACH mask index indication field is used to indicate at least one RO index and at least one number of ROs.

[0314] As an embodiment, the value of the PRACH mask index indication field is used to indicate one ROG index and one number of ROs.

[0315] As an embodiment, the value of the PRACH mask index indication field is used to indicate at least one RO index and at least one number of ROs allowed for multiple PRACH transmissions.

[0316] As an embodiment, the value of the PRACH mask index indication field is used to indicate one ROG index and one number of ROs allowed for multiple PRACH transmissions.

[0317] Figure 7 Shows an example of another indication corresponding to the value of the PRACH mask index indication field. In Figure 7 In the example, the ROG (e.g., one or more ROGs) or multiple ROs corresponding to the value of the PRACH mask index indication field are allowed for multiple PRACH transmissions. In Figure 7 In the example, the value of the PRACH mask index indication field corresponds to the number of ROs, or the ROG or multiple ROs corresponding to the value of the PRACH mask index indication field are indicated by the number of ROs.

[0318] As an embodiment, the value of the PRACH mask index indication field is used to indicate at least one number of ROs.

[0319] As an embodiment, the value of the PRACH mask index indication field is used to indicate one number of ROs.

[0320] As an embodiment, the value of the PRACH mask index indication field is used to indicate at least one number of ROs allowed for multiple PRACH transmissions.

[0321] As an embodiment, the value of the PRACH mask index indication field is used to indicate one number of ROs allowed for multiple PRACH transmissions.

[0322] Figure 8 Shows an example of another indication corresponding to the value of the PRACH mask index indication field. In Figure 8In the example of, the value of the PRACH mask index indication field corresponds to the ROG (e.g., one or more ROGs) or multiple ROs that are allowed for multiple PRACH transmissions. In Figure 8 In the example of, the value of the PRACH mask index indication field corresponds to the ROG index, the RO index, and the number of ROs, or the ROG or multiple ROs corresponding to the value of the PRACH mask index indication field are indicated by the ROG index, the RO index, and the number of ROs.

[0323] As an embodiment, the value of the PRACH mask index indication field is used to indicate at least one ROG index, at least one RO index, and at least one number of ROs.

[0324] As an embodiment, the value of the PRACH mask index indication field is used to indicate one ROG index, one RO index, and one number of ROs.

[0325] As an embodiment, the value of the PRACH mask index indication field is used to indicate at least one ROG index, at least one RO index, and at least one number of ROs that are allowed for multiple PRACH transmissions.

[0326] As an embodiment, the value of the PRACH mask index indication field is used to indicate one ROG index, one RO index, and one number of ROs that are allowed for multiple PRACH transmissions.

[0327] Figure 9 Shows an example of another indication corresponding to the value of the PRACH mask index indication field. In Figure 9 In the example of, the ROG (e.g., one or more ROGs) or multiple ROs corresponding to the value of the PRACH mask index indication field are prohibited from being used for multiple PRACH transmissions. In Figure 9 In the example of, the value of the PRACH mask index indication field corresponds to the ROG index, or the ROG or multiple ROs corresponding to the value of the PRACH mask index indication field are indicated by the ROG index.

[0328] As an embodiment, the value of the PRACH mask index indication field is used to indicate at least one ROG index that is prohibited from multiple PRACH transmissions.

[0329] As an embodiment, the value of the PRACH mask index indication field is used to indicate one ROG index that is prohibited from multiple PRACH transmissions.

[0330] Figure 10 Shows an example of another indication corresponding to the value of the PRACH mask index indication field. In Figure 10In the example, among the values of the PRACH mask index indication field, for some values, the corresponding ROG (e.g., one or more ROGs) or multiple ROs are allowed for multiple PRACH transmissions, while for some values, the corresponding ROG is prohibited for multiple PRACH transmissions. In Figure 10 the example, the value of the PRACH mask index indication field corresponds to one or more of the ROG index, RO index, and number of ROs. Alternatively, the ROG or multiple ROs corresponding to the value of the PRACH mask index indication field are indicated by one or more of the ROG index, RO index, and number of ROs.

[0331] As an embodiment, the value of the PRACH mask index indication field is used to indicate one or more of the ROG index, RO index, and number of ROs that are allowed for multiple PRACH transmissions.

[0332] As an embodiment, the value of the PRACH mask index indication field is used to indicate one or more of the ROG index, RO index, and number of ROs that are prohibited for multiple PRACH transmissions.

[0333] It should be noted that Figures 5 to 10 the examples listed are only for ease of understanding. For the sake of brevity, other combination methods are not listed. In fact, the indication corresponding to the value of the PRACH mask index indication field can be indicated by any combination of one or more of the ROG index, RO index, and number of ROs. In addition, the indication corresponding to the value of the PRACH mask index indication field can be allowed for multiple PRACH transmissions; or prohibited for multiple PRACH transmissions; or can be partially allowed for multiple PRACH transmissions and partially prohibited for multiple PRACH transmissions.

[0334] It should also be noted that Figures 5 to 10 the value of the PRACH mask indication field in Figures 5 to 10 is only an example and is not used to limit that the value of the PRACH mask indication field in this application is only the listed values. Additionally,

[0335] As described above in conjunction with Figures 2 to 10 from the perspective of the first node, the method of the first node for wireless communication provided in the embodiments of this application is described in detail. Below, in conjunction with Figure 11 from the perspective of the second node, the method of the second node for wireless communication provided in the embodiments of this application is described. It should be understood that the descriptions of the first node and the second node correspond to each other. Therefore, for the parts not described in detail, reference can be made to the foregoing.

[0336] As an example, the second node may be a node that sends the first signaling and / or the second signaling in a communication system.

[0337] As an example, the second node may be a base station.

[0338] As an example, the second node may include one or more transmitters. For example, the second node may include a first transmitter and a second transmitter.

[0339] As an example, the second node may include a first receiver.

[0340] Figure 11 It is a schematic flowchart of a method in a second node provided by an embodiment of the present application and used for wireless communication. Figure 11 The method shown may include step S1110 and step S1120.

[0341] In step S1110, the first signaling is sent.

[0342] As an example, the first signaling is used to determine a plurality of ROGs, and any one of the plurality of ROGs includes a plurality of ROs.

[0343] In step S1120, the second signaling is sent.

[0344] As an example, the second signaling is used to indicate the value of a first index, and the value of the first index corresponds to at least one ROG among the plurality of ROGs.

[0345] As an example, the method further includes: receiving a plurality of PRACHs. The plurality of PRACHs are sent on a target ROG. Wherein, the target ROG is one of the at least one ROG corresponding to the value of the first index.

[0346] As an example, the method further includes: receiving a plurality of PRACHs. The plurality of PRACHs are sent on a target ROG. Wherein, the target ROG is one of the plurality of ROGs determined by the first signaling and other than the at least one ROG corresponding to the value of the first index.

[0347] As an example, the value of the first index is one of a plurality of non - negative integers, and the plurality of non - negative integers respectively correspond one - to - one with a plurality of subsets of physical random access channel opportunity groups; any one of the plurality of subsets of physical random access channel opportunity groups includes at least one physical random access channel opportunity group among the plurality of physical random access channel opportunity groups.

[0348] As an example, at least one physical random access channel occasion group subset among the multiple physical random access channel occasion group subsets includes at least one physical random access channel occasion group that is allowed for the transmission of multiple physical random access channels.

[0349] As an example, at least one physical random access channel occasion group subset among the multiple physical random access channel occasion group subsets includes at least one physical random access channel occasion group that is prohibited from the transmission of multiple physical random access channels.

[0350] As an example, a third signaling is used to configure the correspondence between the multiple non - negative integers and the multiple physical random access channel occasion group subsets.

[0351] As an example, the at least one physical random access channel occasion group corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

[0352] As an example, the value of the first index corresponds to a first physical random access channel occasion group index, and the first physical random access channel occasion group index is used to determine a first physical random access channel occasion from the multiple physical random access channel occasion groups.

[0353] As an example, the value of the first index corresponds to a first occasion number, and the number of physical random access channel occasions included in at least one physical random access channel occasion group among the multiple physical random access channel occasion groups is equal to the first occasion number.

[0354] As an example, the value of the first index corresponds to a first physical random access channel occasion index, and the first physical random access channel occasion index is used to determine a first physical random access channel occasion from the multiple physical random access channel occasions included in the multiple physical random access channel occasion groups, and any physical random access channel occasion among the multiple physical random access channel occasions included in the multiple physical random access channel occasion groups belongs to one of the multiple physical random access channel occasion groups.

[0355] As an example, the second signaling includes multiple indication fields, and at least one of the multiple indication fields is used to indicate the value of the first index.

[0356] As an embodiment, the plurality of indication fields include at least two of the following: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field; wherein, the first index field is used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups; alternatively, the synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0357] As described above in conjunction with Figures 1 to 11 , the method embodiments of the present application have been described in detail. Next, in conjunction with Figures 12 to 15 , the apparatus embodiments of the present application will be described in detail. It should be understood that the descriptions of the method embodiments and the apparatus embodiments correspond to each other. Therefore, for the parts not described in detail, reference can be made to the previous method embodiments.

[0358] Figure 12 FIG. 11 is a schematic structural diagram of a node for wireless communication provided in an embodiment of the present application. Figure 12 The node 1200 shown may be the first node described above. The node 1200 may include a first receiver 1210 and a second receiver 1220.

[0359] The first receiver 1210 may be configured to receive a first signaling, where the first signaling is used to determine a plurality of physical random access channel occasion groups, and any physical random access channel occasion group among the plurality of physical random access channel occasion groups includes a plurality of physical random access channel occasions.

[0360] The second receiver 1220 may be configured to receive a second signaling, where the second signaling is used to indicate a value of a first index, and the value of the first index corresponds to at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0361] As an embodiment, the node 1200 may include a first transmitter, and send a plurality of physical random access channels on a target physical random access channel occasion group; wherein, the target physical random access channel occasion group is one of the at least one physical random access channel occasion group corresponding to the value of the first index.

[0362] As an embodiment, the node 1200 may include a first transmitter, and send a plurality of physical random access channels on a target physical random access channel occasion group; wherein, the target physical random access channel occasion group is a physical random access channel occasion group other than the at least one physical random access channel occasion group corresponding to the value of the first index among the plurality of physical random access channel occasion groups determined by the first signaling.

[0363] As an embodiment, the value of the first index is one of a plurality of non - negative integers, and the plurality of non - negative integers are respectively in one - to - one correspondence with a plurality of subsets of physical random access channel occasion groups; any one of the plurality of subsets of physical random access channel occasion groups includes at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0364] As an embodiment, at least one physical random access channel occasion group included in at least one of the plurality of subsets of physical random access channel occasion groups is allowed to be used for the transmission of a plurality of physical random access channels.

[0365] As an embodiment, at least one physical random access channel occasion group included in at least one of the plurality of subsets of physical random access channel occasion groups is prohibited from being used for the transmission of a plurality of physical random access channels.

[0366] As an embodiment, a third signaling is used to configure the correspondence between the plurality of non - negative integers and the plurality of subsets of physical random access channel occasion groups.

[0367] As an embodiment, at least one physical random access channel occasion group corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

[0368] As an embodiment, the value of the first index corresponds to a first physical random access channel occasion group index, and the first physical random access channel occasion group index is used to determine a first physical random access channel occasion from the plurality of physical random access channel occasion groups.

[0369] As an embodiment, the value of the first index corresponds to a first occasion number, and the number of physical random access channel occasions included in at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups is equal to the first occasion number.

[0370] As an embodiment, the value of the first index corresponds to a first physical random access channel occasion index, and the first physical random access channel occasion index is used to determine a first physical random access channel occasion from the plurality of physical random access channel occasions included in the plurality of physical random access channel occasion groups, and any one of the plurality of physical random access channel occasions included in the plurality of physical random access channel occasion groups belongs to one of the plurality of physical random access channel occasion groups.

[0371] As an example, the second signaling includes a plurality of indication fields, and at least one of the plurality of indication fields is used to indicate the value of the first index.

[0372] As an example, the plurality of indication fields include at least two of the following: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field; wherein, the first index field is used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups; or, the synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0373] As an example, the first receiver 1210 and the second receiver 1220 can be the transceiver 1430. The first node 1200 may further include a processor 1410 and a memory 1420, specifically as Figure 14 shown.

[0374] Figure 13 It is a schematic structural diagram of a node for wireless communication provided in another embodiment of the present application. Figure 13 The node 1300 shown can be the second node described in any of the foregoing. The node 1300 may include a first transmitter 1310 and a second transmitter 1320.

[0375] The first transmitter 1310 can be used to send first signaling, and the first signaling is used to determine a plurality of physical random access channel occasion groups, and any physical random access channel occasion group among the plurality of physical random access channel occasion groups includes a plurality of physical random access channel occasions.

[0376] The second transmitter 1320 can be used to send second signaling, and the second signaling is used to indicate the value of the first index, and the value of the first index corresponds to at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0377] As an example, the node 1300 may further include a first receiver to receive a plurality of physical random access channels, and the plurality of physical random access channels are sent on a target physical random access channel occasion group; wherein, the target physical random access channel occasion group is one of the at least one physical random access channel occasion group corresponding to the value of the first index.

[0378] As an example, node 1300 may further include a first receiver that receives a plurality of physical random access channels transmitted on a target physical random access channel occasion set; wherein, the target physical random access channel occasion set is one of the plurality of physical random access channel occasion sets determined by the first signaling, excluding at least one physical random access channel occasion set corresponding to the value of the first index.

[0379] As an example, the value of the first index is one of a plurality of non - negative integers, and the plurality of non - negative integers are in one - to - one correspondence with a plurality of subsets of physical random access channel occasion sets; any one of the plurality of subsets of physical random access channel occasion sets includes at least one physical random access channel occasion set among the plurality of physical random access channel occasion sets.

[0380] As an example, at least one physical random access channel occasion set included in at least one subset of the plurality of physical random access channel occasion sets is allowed for the transmission of a plurality of physical random access channels.

[0381] As an example, at least one physical random access channel occasion set included in at least one subset of the plurality of physical random access channel occasion sets is prohibited from being used for the transmission of a plurality of physical random access channels.

[0382] As an example, a third signaling is used to configure the correspondence between the plurality of non - negative integers and the plurality of subsets of physical random access channel occasion sets.

[0383] As an example, the at least one physical random access channel occasion set corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

[0384] As an example, the value of the first index corresponds to a first physical random access channel occasion set index, and the first physical random access channel occasion set index is used to determine a first physical random access channel occasion set from the plurality of physical random access channel occasion sets.

[0385] As an example, the value of the first index corresponds to a first number of occasions, and the number of physical random access channel occasions included in at least one physical random access channel occasion set among the plurality of physical random access channel occasion sets is equal to the first number of occasions.

[0386] As an example, the value of the first index corresponds to a first physical random access channel occasion index, and the first physical random access channel occasion index is used to determine a first physical random access channel occasion from among a plurality of physical random access channel occasions included in the plurality of physical random access channel occasion groups. Any one of the plurality of physical random access channel occasions included in the plurality of physical random access channel occasion groups belongs to one of the plurality of physical random access channel occasion groups.

[0387] As an example, the second signaling includes a plurality of indication fields, and at least one of the plurality of indication fields is used to indicate the value of the first index.

[0388] As an example, the plurality of indication fields include at least two of the following: an uplink / supplementary uplink indication field, a synchronization signal / physical broadcast channel block index field, a first index field, and a reserved field; wherein the first index field is used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups; or, the synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups.

[0389] As an example, the first transmitter 1310 and the second transmitter 1320 may be a transceiver 1430. The second node 1300 may further include a processor 1410 and a memory 1420, specifically as Figure 14 shown.

[0390] Figure 14 is a schematic structural diagram of a communication device according to an embodiment of the present application. Figure 14 The dashed lines in indicate that the unit or module is optional. The apparatus 1400 can be used to implement the method described in the above method embodiment. The apparatus 1400 can be a chip, a user equipment, or a network equipment.

[0391] Device 1400 may include one or more processors 1410. The processor 1410 may support the device 1400 in implementing the methods described in the foregoing method embodiments. The processor 1410 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may also be other general-purpose processors, digital signal processors (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 the processor may also be any conventional processor, etc.

[0392] Device 1400 may also include one or more memories 1420. A program is stored on the memory 1420, and the program may be executed by the processor 1410, so that the processor 1410 executes the methods described in the foregoing method embodiments. The memory 1420 may be independent of the processor 1410 or integrated in the processor 1410.

[0393] Device 1400 may also include a transceiver 1430. The processor 1410 may communicate with other devices or chips through the transceiver 1430. For example, the processor 1410 may transmit and receive data with other devices or chips through the transceiver 1430.

[0394] Figure 15 This is a schematic diagram of the hardware module of the communication device provided in the embodiments of the present application. Specifically, Figure 15 A block diagram showing a first communication device 450 and a second communication device 410 communicating with each other in an access network is shown.

[0395] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmitting processor 468, a receiving processor 456, a multi-antenna transmitting processor 457, a multi-antenna receiving processor 458, a transmitter / receiver 454, and an antenna 452.

[0396] The second communication device 410 includes a controller / processor 475, a memory 476, a data source 477, a receiving processor 470, a transmitting processor 416, a multi-antenna receiving processor 472, a multi-antenna transmitting processor 471, a transmitter / receiver 418, and an antenna 420.

[0397] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network or upper layer data packets from the data source 477 are provided to the controller / processor 475. The core network and the data source 477 represent all protocol layers above the L2 layer. The controller / processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation for the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the Ll layer (i.e., the physical layer). The transmit processor 416 implements encoding and interleaving to facilitate forward error correction at the second communication device 410, and mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying, quadrature phase shift keying, M-phase shift keying, M-quadrature amplitude modulation). The multi-antenna transmit processor 471 performs digital spatial precoding on the encoded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time domain and / or frequency domain, and then uses the inverse fast Fourier transform to generate a physical channel carrying a time-domain multi-carrier symbol stream. Subsequently, the multi-antenna transmit processor 471 performs transmit analog precoding / beamforming operations on the time-domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream and then provides it to different antennas 420.

[0398] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives signals through its respective antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier, and converts the radio frequency stream into a baseband multi-carrier symbol stream and provides it to the receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receive processor 458 performs receive analog precoding / beamforming operations on the baseband multi-carrier symbol stream from the receivers 454. The receive processor 456 uses the fast Fourier transform to convert the baseband multi-carrier symbol stream after the receive analog precoding / beamforming operations from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receive processor 456, where the reference signal will be used for channel estimation, and the data signal recovers any spatial stream destined for the first communication device 450 after multi-antenna detection in the multi-antenna receive processor 458. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. Subsequently, the receive processor 456 decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. Subsequently, the upper layer data and control signals are provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program code and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover upper layer data packets from the second communication device 410. Subsequently, the upper layer data packets are provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 for L3 processing.

[0399] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, an upper layer data packet is provided to the controller / processor 459 using the data source 467. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission function described at the second communication device 410 in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 performs header compression, encryption, packet segmentation and reordering, and multiplexing between the logical and transport channels, and implements the L2 layer functions for the user plane and the control plane. The controller / processor 459 is also responsible for retransmitting lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Subsequently, the transmit processor 468 modulates the generated spatial streams into multi-carrier / single-carrier symbol streams, and after the analog precoding / beamforming operation in the multi-antenna transmit processor 457, provides them to different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream and then provides it to the antenna 452.

[0400] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function described at the first communication device 450 in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna receive processor 472 and the receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 jointly implement the Ll layer functions. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 may be associated with a memory 476 that stores program code and data. The memory 476 may be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides demultiplexing between the transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper layer data packet from the first communication device 450. The upper layer data packet from the controller / processor 475 may be provided to the core network or all protocol layers above the L2 layer, and various control signals may also be provided to the core network or L3 for L3 processing.

[0401] As an embodiment, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 450 is at least configured to: receive first signaling for determining a plurality of groups of physical random access channel opportunities, any one of the plurality of groups of physical random access channel opportunities including a plurality of physical random access channel opportunities; receive second signaling for indicating a value of a first index, the value of the first index corresponding to at least one of the plurality of groups of physical random access channel opportunities.

[0402] As an embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program causing actions when executed by at least one processor, the actions including: receiving first signaling for determining a plurality of groups of physical random access channel opportunities, any one of the plurality of groups of physical random access channel opportunities including a plurality of physical random access channel opportunities; receiving second signaling for indicating a value of a first index, the value of the first index corresponding to at least one of the plurality of groups of physical random access channel opportunities.

[0403] As an embodiment, the first communication device 450 corresponds to the first node in the present application.

[0404] As an embodiment, the second communication device 410 corresponds to the second node in the present application.

[0405] As an embodiment, the first communication device 450 is an NCR.

[0406] As an embodiment, the first communication device 450 is a user equipment.

[0407] As an embodiment, the first communication device 450 is a user equipment supporting V2X.

[0408] As an embodiment, the first communication device 450 is a user equipment supporting D2D.

[0409] As an embodiment, the second communication device 410 is a base station.

[0410] As an example, the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, and the controller / processor 459 are used to receive the first signaling and / or the second signaling in this application.

[0411] As an example, the antenna 420, the transmitter 418, the multi-antenna transmitting processor 471, the transmitting processor 416, and the controller / processor 475 are used to transmit the first signaling and / or the second signaling in this application.

[0412] As an example, the antenna 452, the transmitter 454, the multi-antenna transmitting processor 457, the transmitting processor 468, and the controller / processor 459 are used to transmit multiple PRACHs in this application.

[0413] As an example, the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, and the controller / processor 475 are used to receive multiple PRACHs in this application.

[0414] An embodiment of this application further provides a computer-readable storage medium for storing a program. The computer-readable storage medium can be applied to the terminal or network device provided in the embodiment of this application, and the program enables a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0415] An embodiment of this application further provides a computer program product. The computer program product includes a program. The computer program product can be applied to the terminal or network device provided in the embodiment of this application, and the program enables a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0416] An embodiment of this application further provides a computer program. The computer program can be applied to the terminal or network device provided in the embodiment of this application, and the computer program enables a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0417] It should be understood that the terms "system" and "network" in this application can be used interchangeably. Additionally, the terms used in this application are only for explaining the specific embodiments of this application and are not intended to limit this application. The terms "first", "second", "third", "fourth", etc. in the specification, claims, and drawings of this application are used to distinguish different objects rather than to describe a specific order. Furthermore, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0418] In the embodiments of the present application, the "indication" mentioned may be a direct indication, an indirect indication, or may represent an associated relationship. For example, A indicates B, which may mean that A directly indicates B. For example, B can be obtained through A; it may also mean that A indirectly indicates B. For example, A indicates C and B can be obtained through C; it may also mean that there is an associated relationship between A and B.

[0419] In the embodiments of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A. B can also be determined according to A and / or other information.

[0420] In the embodiments of the present application, the term "corresponding" may mean that there is a direct or indirect corresponding relationship between the two, may also mean that there is an associated relationship between the two, or may be a relationship such as indication and being indicated, configuration and being configured, etc.

[0421] In the embodiments of the present application, "predefined" or "preconfigured" can be implemented by pre-saving corresponding codes, tables or other means that can be used to indicate relevant information in a device (for example, including user equipment and network equipment). The present application does not limit its specific implementation manner. For example, predefined may refer to being defined in a protocol.

[0422] In the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field. For example, it may include LTE protocol, NR protocol, and related protocols applied to future communication systems. The present application does not limit this.

[0423] In the embodiments of the present application, the term "and / or" is merely a description of the associated relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally means that the associated objects before and after are in an "or" relationship.

[0424] In various embodiments of the present application, the magnitude of the sequence numbers of the above processes does not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0425] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0426] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0427] In addition, in each embodiment of the present application, the functional units can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

[0428] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. 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 a website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be read by a computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD)), etc.

[0429] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claimed rights.

Claims

1. A first node used for wireless communication, characterized in that, Comprising: A first transceiver, which receives a first signaling, the first signaling being used to determine a plurality of physical random access channel occasion groups, any one of the plurality of physical random access channel occasion groups comprising a plurality of physical random access channel occasions (ROs), and the first signaling being a radio resource control (RRC) layer signaling; The first transceiver, which receives a second signaling, the second signaling being used to indicate a value of a first index, the value of the first index corresponding to at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups, the second signaling being an RRC layer signaling or the second signaling being DCI format 1_0, and the value of the first index being one of a plurality of non-negative integers; The first transceiver, which transmits a plurality of random access preambles using the same beam on a first physical random access channel occasion group, the first physical random access channel occasion group being one of the at least one physical random access channel occasion group, and the number of ROs included in the first physical random access channel occasion group being equal to one of {2, 4, 8}.

2. The first node according to claim 1, characterized in that, The value of the first index is used to indicate an RO index, or the value of the first index is used to indicate a plurality of ROs.

3. The first node according to claim 1 or 2, characterized in that The transmission of the plurality of random access preambles is triggered by a physical downlink control channel (PDCCH) command, or the transmission of the plurality of random access preambles is triggered by a higher layer, or the transmission of the plurality of random access preambles is triggered by an RRC layer event, or the transmission of the plurality of random access preambles is triggered by a media access control (MAC) entity.

4. The first node according to claim 3, wherein The transmission of the plurality of random access preambles is used for a random access attempt.

5. The first node according to claim 1 or 2, wherein: The first transceiver, which receives a third signaling, the third signaling being used to configure the correspondence between the plurality of non-negative integers and at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups, and the third signaling including an RRC layer signaling.

6. The first node according to claim 1 or 2, characterized in that The at least one physical random access channel occasion group corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

7. The first node according to claim 1 or 2, characterized in that, The value of the first index corresponds to a first RO index, the first RO index being used to determine a first RO, and the first RO being used to determine the first physical random access channel occasion group.

8. The first node according to claim 7, characterized in that, The first RO is one of the plurality of ROs included in the first physical random access channel occasion group.

9. The first node according to claim 7, wherein The first RO and the number of ROs included in the first physical random access channel occasion group are jointly used to determine the first physical random access channel occasion group.

10. The first node according to claim 1 or 2, characterized in that, The second signaling includes a plurality of indication fields, and at least one of the plurality of indication fields is used to indicate the value of the first index.

11. The first node according to claim 1 or 2, characterized in that, The second signaling includes a plurality of indication fields, the plurality of indication fields including at least two of the following: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field, and the first index field being a physical random access channel mask index field.

12. The first node according to claim 11, wherein The synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate the at least one physical random access channel occasion group corresponding to the first index.

13. The first node according to claim 11, wherein The first index field is used to indicate one or more ROs associated with the synchronization signal / physical broadcast channel block index indicated by the synchronization signal / physical broadcast channel block index field.

14. A second node used for wireless communication, characterized in that, Comprising: A second transceiver that sends a first signaling, the first signaling being used to determine a plurality of physical random access channel occasion groups, any one of the plurality of physical random access channel occasion groups including a plurality of physical random access channel occasions RO, and the first signaling being a radio resource control (RRC) layer signaling; The second transceiver that sends a second signaling, the second signaling being used to indicate a value of a first index, the value of the first index corresponding to at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups, the second signaling being an RRC layer signaling or the second signaling being DCI format 1_0, and the value of the first index being one of a plurality of non-negative integers; The second transceiver that receives a plurality of random access preambles, the plurality of random access preambles being sent using the same beam on a first physical random access channel occasion group, the first physical random access channel occasion group being one of the at least one physical random access channel occasion group, and the number of ROs included in the first physical random access channel occasion group being equal to one of {2, 4, 8}.

15. The second node according to claim 14, wherein The value of the first index is used to indicate an RO index, or the value of the first index is used to indicate a plurality of ROs.

16. The second node according to claim 14 or 15, characterized in that, The transmission of the plurality of random access preambles is triggered by a physical downlink control channel (PDCCH) command, or the transmission of the plurality of random access preambles is triggered by a higher layer, or the transmission of the plurality of random access preambles is triggered by an RRC layer event, or the transmission of the plurality of random access preambles is triggered by a media access control (MAC) entity.

17. The second node according to claim 16, wherein The transmission of the plurality of random access preambles is used for a random access attempt.

18. The second node according to claim 14 or 15, wherein The second transceiver that sends a third signaling, the third signaling being used to configure the correspondence between the plurality of non-negative integers and at least one physical random access channel occasion group among the plurality of physical random access channel occasion groups, and the third signaling including an RRC layer signaling.

19. The second node according to claim 14 or 15, characterized in that, The at least one physical random access channel occasion group corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

20. The second node according to claim 14 or 15, characterized in that, The value of the first index corresponds to a first RO index, the first RO index being used to determine a first RO, and the first RO being used to determine the first physical random access channel occasion group.

21. The second node according to claim 20, wherein The first RO is one of the plurality of ROs included in the first physical random access channel occasion group.

22. The second node according to claim 20, wherein The first RO and the number of ROs included in the first physical random access channel occasion group are jointly used to determine the first physical random access channel occasion group.

23. The second node according to claim 14 or 15, characterized in that, The second signaling includes a plurality of indication fields, and at least one of the plurality of indication fields is used to indicate the value of the first index.

24. The second node according to claim 14 or 15, characterized in that, The second signaling includes a plurality of indication fields, and at least two of the following are included in the plurality of indication fields: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field, and the first index field is a physical random access channel mask index field.

25. The second node according to claim 24, wherein The synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate the at least one physical random access channel occasion group corresponding to the first index.

26. The second node according to claim 24, wherein The first index field is used to indicate one or more ROs associated with the synchronization signal / physical broadcast channel block index indicated by the synchronization signal / physical broadcast channel block index field.

27. A method in a first node for use in wireless communication, characterized in that, Including: Receiving a first signaling, the first signaling is used to determine a plurality of physical random access channel occasion groups, and any physical random access channel occasion group in the plurality of physical random access channel occasion groups includes a plurality of physical random access channel occasions RO, and the first signaling is a radio resource control (RRC) layer signaling; Receiving a second signaling, the second signaling is used to indicate the value of a first index, the value of the first index corresponds to at least one physical random access channel occasion group in the plurality of physical random access channel occasion groups, the second signaling is an RRC layer signaling or the second signaling is DCI format 1_0, and the value of the first index is one of a plurality of non-negative integers; Transmitting a plurality of random access preambles on a first physical random access channel occasion group, the first physical random access channel occasion group is one of the at least one physical random access channel occasion group, and the number of ROs included in the first physical random access channel occasion group is equal to one of {2, 4, 8}.

28. The method according to claim 27, wherein The value of the first index is used to indicate an RO index, or the value of the first index is used to indicate a plurality of ROs.

29. The method according to claim 27 or 28, characterized in that, The transmission of the plurality of random access preambles is triggered by a physical downlink control channel (PDCCH) command, or the transmission of the plurality of random access preambles is triggered by a higher layer, or the transmission of the plurality of random access preambles is triggered by an RRC layer event, or the transmission of the plurality of random access preambles is triggered by a media access control (MAC) entity.

30. The method according to claim 29, wherein The transmission of the plurality of random access preambles is used for a random access attempt.

31. The method according to claim 27 or 28, characterized in that, The method further includes: Receiving a third signaling, the third signaling is used to configure the correspondence between the plurality of non-negative integers and at least one physical random access channel occasion group in the plurality of physical random access channel occasion groups, and the third signaling includes an RRC layer signaling.

32. The method according to claim 27 or 28, characterized in that, The at least one physical random access channel occasion group corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

33. The method according to claim 27 or 28, characterized in that The value of the first index corresponds to a first RO index, the first RO index is used to determine a first RO, and the first RO is used to determine the first physical random access channel occasion group.

34. The method according to claim 33, wherein The first RO is one of the multiple ROs included in the first physical random access channel occasion set.

35. The method according to claim 33, wherein The first RO and the number of ROs included in the first physical random access channel occasion set are jointly used to determine the first physical random access channel occasion set.

36. The method according to claim 27 or 28, characterized in that, The second signaling includes multiple indication fields, and at least one of the multiple indication fields is used to indicate the value of the first index.

37. The method according to claim 27 or 28, characterized in that, The second signaling includes multiple indication fields, and at least two of the multiple indication fields include: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field field, and the first index field is a physical random access channel mask index field.

38. The method according to claim 37, wherein The synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate the at least one physical random access channel occasion set corresponding to the first index.

39. The method according to claim 37, wherein The first index field is used to indicate one or more ROs associated with the synchronization signal / physical broadcast channel block index indicated by the synchronization signal / physical broadcast channel block index field.

40. A method in a second node used for wireless communication, characterized in that, Including: Sending first signaling, the first signaling is used to determine multiple physical random access channel occasion sets, any one of the multiple physical random access channel occasion sets includes multiple physical random access channel occasion ROs, and the first signaling is radio resource control (RRC) layer signaling; Sending second signaling, the second signaling is used to indicate the value of the first index, the value of the first index corresponds to at least one physical random access channel occasion set among the multiple physical random access channel occasion sets, the second signaling is an RRC layer signaling or the second signaling is DCI format 1_0, and the value of the first index is one of multiple non-negative integers; Receiving multiple random access preambles, the multiple random access preambles are sent using the same beam on the first physical random access channel occasion set, the first physical random access channel occasion set is one of the at least one physical random access channel occasion set, and the number of ROs included in the first physical random access channel occasion set is equal to one of {2, 4, 8}.

41. The method according to claim 40, wherein, The value of the first index is used to indicate an RO index, or the value of the first index is used to indicate multiple ROs.

42. The method according to claim 40 or 41, characterized in that, The transmission of the multiple random access preambles is triggered by a physical downlink control channel (PDCCH) command, or the transmission of the multiple random access preambles is triggered by a higher layer, or the transmission of the multiple random access preambles is triggered by an RRC layer event, or the transmission of the multiple random access preambles is triggered by a media access control (MAC) entity.

43. The method according to claim 42, wherein The transmission of the multiple random access preambles is used for a random access attempt.

44. The method according to claim 40 or 41, characterized in that, The method further includes: Sending third signaling, the third signaling is used to configure the correspondence between the multiple non-negative integers and at least one physical random access channel occasion set among the multiple physical random access channel occasion sets, and the third signaling includes RRC layer signaling.

45. The method according to claim 40 or 41, characterized in that, The at least one set of physical random access channel occasions corresponding to the value of the first index is associated with the same synchronization signal / physical broadcast channel block index.

46. The method according to claim 40 or 41, characterized in that, The value of the first index corresponds to a first RO index, the first RO index is used to determine a first RO, and the first RO is used to determine the first set of physical random access channel occasions.

47. The method according to claim 46, characterized in that, The first RO is one of the multiple ROs included in the first set of physical random access channel occasions.

48. The method according to claim 46, characterized in that, The first RO and the number of ROs included in the first set of physical random access channel occasions are jointly used to determine the first set of physical random access channel occasions.

49. The method according to claim 40 or 41, characterized in that, The second signaling includes a plurality of indication fields, and at least one of the plurality of indication fields is used to indicate the value of the first index.

50. The method according to claim 40 or 41, characterized in that, The second signaling includes a plurality of indication fields, and at least two of the plurality of indication fields include: uplink / supplementary uplink indication field, synchronization signal / physical broadcast channel block index field, first index field, and reserved field, and the first index field is a physical random access channel mask index field.

51. The method according to claim 50, characterized in that, The synchronization signal / physical broadcast channel block index field and the first index field are jointly used to indicate the at least one set of physical random access channel occasions corresponding to the first index.

52. The method according to claim 50, wherein The first index field is used to indicate one or more ROs associated with the synchronization signal / physical broadcast channel block index indicated by the synchronization signal / physical broadcast channel block index field.

53. A node used for wireless communication, characterized in that, Comprising a transceiver, a memory, and a processor, the memory is used to store programs, and the processor is used to call the programs in the memory and control the transceiver to receive or send signals, so that the node executes the method according to any one of claims 27-39 or 40-52.

54. A communication device, characterized in that, Comprising a processor, configured to call a program from a memory, so that the device executes the method according to any one of claims 27-39 or 40-52.

55. A chip, characterized in that, Comprising a processor, configured to call a program from a memory, so that the device installed with the chip executes the method according to any one of claims 27-39 or 40-52.

56. A computer-readable storage medium, characterized in that, Stored thereon is a program, and the program causes a computer to execute the method according to any one of claims 27-39 or 40-52.

57. A computer program product, characterized in that, Comprising a program, and the program causes a computer to execute the method according to any one of claims 27-39 or 40-52.

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