Method for determining physical random access channel transmission occasion (RO) resources, terminal, and network-side device

Abstract

The present application relates to the technical field of communications, and discloses a method for determining physical random access channel (PRACH) transmission occasion (RO) resources, a terminal, and a network-side device. The method for determining the RO resources in embodiments of the present application comprises: a terminal receiving target indication information, the target indication information comprising a PRACH mask index, and the PRACH mask index being used for indicating RO resources during PRACH repeated transmission; and, on the basis of the PRACH mask index, determining a target RO group, the target RO group being used for the PRACH repeated transmission.

Description

Method, terminal and network side equipment for determining physical random access channel transmission opportunity RO resources

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China on September 27, 2023, with application number 202311269913.9 and invention name “Method, terminal and network-side equipment for determining physical random access channel transmission opportunity RO resources”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a method for determining physical random access channel transmission opportunity RO resources, a terminal, and a network-side device. Background Art

[0004] In the related art, for the non-contention random access process, the network device sends information carrying a preamble index and a physical random access control channel (PRACH) mask index to the terminal to instruct the terminal to send the preamble corresponding to the preamble index on the PRACH resource indicated by the PRACH mask index, and the network device often sends the above information to the terminal device through a physical downlink control channel (PDCCH) or a radio resource control (RRC) signaling.

[0005] However, the PRACH resource indication scheme provided in the related art can only indicate the physical random access channel transmission opportunity (PRACH transmission occasion, also written as PRACH occasion or RO) used for a single PRACH transmission, and is not applicable to repeated PRACH transmissions, which affects communication performance.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a method for determining physical random access channel transmission opportunity RO resources, a terminal, and a network-side device, which can indicate the RO resources used for PRACH repeated transmission and ensure communication performance.

[0008] In a first aspect, a method for determining RO resources is provided, comprising: a terminal receiving target indication information, wherein the target indication information includes a physical random access channel (PRACH) mask index, and the PRACH mask index is used to indicate the RO resources during PRACH repeated transmission; and determining a target RO group according to the PRACH mask index, and the target RO group is used for the PRACH repeated transmission.

[0009] In a second aspect, a method for determining RO resources is provided, including: a network side device sends target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate the RO resource during PRACH repeated transmission.

[0010] In a third aspect, a device for determining RO resources is provided, including: a receiving module for receiving target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate the RO resources during PRACH repeated transmission; a determination module for determining a target RO group according to the PRACH mask index, and the target RO group is used for the PRACH repeated transmission.

[0011] In a fourth aspect, a device for determining RO resources is provided, comprising: a sending module for sending target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate the RO resource during PRACH repeated transmission.

[0012] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0013] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run a program or instruction to implement the steps of the method described in the first aspect.

[0014] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0015] In an eighth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the steps of the method described in the second aspect.

[0016] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0017] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0018] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0019] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0020] In an embodiment of the present application, the target indication information is received by the terminal, and the target RO group is determined according to the RO resources indicated by the PRACH mask index in the target indication information. Thus, the indication of the RO resources during repeated transmission of the PRACH can be achieved, so that the terminal and the network side device have the same understanding of the RO resources during repeated transmission of the PRACH, thereby ensuring communication performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a wireless communication system provided by an exemplary embodiment of the present application.

[0022] FIG2 is a flowchart of a method for determining RO resources provided by an exemplary embodiment of the present application.

[0023] FIG3 is a second flowchart of a method for determining RO resources provided by an exemplary embodiment of the present application.

[0024] FIG4 a is a schematic diagram of one of the indication methods of RO resources provided by an exemplary embodiment of the present application.

[0025] FIG4 b is a second schematic diagram of an indication method of RO resources provided by an exemplary embodiment of the present application.

[0026] FIG4c is a third schematic diagram of an indication method of RO resources provided by an exemplary embodiment of the present application.

[0027] FIG5 is a third flowchart of a method for determining RO resources provided by an exemplary embodiment of the present application.

[0028] FIG6 is a fourth schematic diagram of an indication method of RO resources provided by an exemplary embodiment of the present application.

[0029] FIG. 7 is a fourth flowchart of a method for determining RO resources provided by an exemplary embodiment of the present application.

[0030] FIG8 is a structural diagram of a device for RO resources provided by an exemplary embodiment of the present application.

[0031] FIG9 is a second structural diagram of an apparatus for RO resources provided by an exemplary embodiment of the present application.

[0032] FIG10 is a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application.

[0033] FIG11 is a schematic structural diagram of a terminal provided by an exemplary embodiment of the present application.

[0034] FIG12 is a schematic structural diagram of a network-side device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0036] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0037] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0038] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0039] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0040] Based on this, for ease of understanding, the relevant technical features mentioned later in this application are introduced here, as follows.

[0041] (1) Contention Based Random Access (CBRA) process.

[0042] In the contention-based 4-step Random Access Channel (RACH) process, the terminal first sends Message (Mg) 1, i.e., the preamble, to the network on the RO resource. After the network detects the preamble, it sends Msg2 / Random Access Response (RAR) message, which includes the number of the preamble detected by the network and the uplink radio resources allocated to the terminal for sending Msg3. After receiving Msg2, the terminal confirms that at least one of the preamble numbers carried in Msg2 matches the number of the preamble it sent. Then, based on the resources indicated by the RAR, it sends Msg3 containing contention resolution information. After receiving Msg3, the network sends Msg4 containing contention resolution information. Upon receiving Msg4, the terminal confirms that the contention resolution information matches the one it sent in Msg3, thus completing the 4-step random access.

[0043] The network includes uplink grant (UL grant) information in the RAR to indicate the scheduling information of the Msg3 physical uplink shared channel (PUSCH), and includes information such as the RACH preamble identifier (ID), the temporary cell radio network temporary identifier (TC-RNTI), and the timing advance (TA). If the network does not receive the Msg3PUSCH, it can schedule the retransmission of the Msg3PUSCH in the physical downlink control channel (PDCCH) scrambled by the TC-RNTI.

[0044] (2) Contention Free Random Access (CFRA) Process

[0045] For the contention random access process, different terminals randomly select Preamble for transmission, so different terminals may select the same Preamble to send on the same RO resource. This situation can be understood as a terminal Preamble conflict. In this case, different terminals will receive the same RAR. At this time, different terminals will transmit Msg3PUSCH according to the scheduling information in the RAR UL grant. Since the existing technology does not support repeated transmission of Msg3PUSCH, the network can only decode the PUSCH (including contention resolution information) sent by one terminal on one Msg3PUSCH scheduling resource. Therefore, the network will include the contention resolution information received in Msg3 in Msg4. If the contention resolution information in Msg4 received by the terminal matches the contention resolution information sent by the terminal in Msg3PUSCH, the terminal considers that the contention resolution is successful. If they do not match, the contention resolution is considered unsuccessful.

[0046] If the contention resolution is unsuccessful, the terminal reselects resources, performs PRACH transmission, and makes the next random access attempt.

[0047] (3) Selection of random access resources

[0048] In NR, a cell can configure multiple frequency division multiplexed (FDM) ROs (referred to as ROs for simplicity) at a time location in the PRACH transmission domain. The number of ROs that can be FDMed at a time can be: {1, 2, 4, 8}, which is configured by the higher-layer parameter msg1-FDM.

[0049] The random access preamble can only be transmitted on the time domain resources configured by the parameter PRACH configuration index (ConfigurationIndex), and the random access preamble can only be transmitted on the frequency domain resources configured by the parameter msg1-FDM.

[0050] During initial access, PRACH frequency domain resources are numbered in ascending order starting from the lowest frequency RO resource in the initial active uplink bandwidth part. Otherwise, PRACH frequency domain resources are numbered in ascending order starting from the lowest frequency RO resource in the active uplink bandwidth part.

[0051] In NR, there is an association between the RO and the synchronization signal block (Synchronization Signal and PBCH block, SSB) actually sent. That is, the RO is first in the frequency domain (from low frequency to high frequency) and then in the time domain. One SSB may be associated with multiple consecutive ROs, or multiple SSBs may be associated with one RO. In this case, different SSBs correspond to different Preambles. For example, oneEighth means that one SSB is associated with 8 consecutive ROs, and eight means that 8 SSBs are associated with one RO; after all SSBs are associated with ROs in one round, an SSB-RO mapping cycle is formed. An SSB-RO association period (SSB-RO association period) may include one or more SSB-RO mapping periods. An SSB-RO association pattern period (SSB-RO association pattern period) may include one or more SSB-RO association periods.

[0052] Typically, a base station can use different beams to transmit different SSBs, where the number of SSBs is configured by the ssb-position burst (PositionsInBurst) parameter. For FR2, the maximum number of SSBs is 64. The corresponding terminal sends the Preamble on the RO associated with the SSB. In this way, the terminal selects the RO / "RO and preamble combination" associated with the SSB with a good signal based on the strength of the received downlink beam or SSB to send Msg1. In this way, the network can determine the SSB selected by the terminal based on the RO / "RO and preamble combination" of the received Preamble. Msg2 is sent on the downlink beam corresponding to the SSB to ensure the reception quality of the downlink signal.

[0053] Before sending PRACH, the terminal first performs resource selection. First, based on the reference signal received power (RSRP) of the received beam or SSB, it selects an SSB with RSRP higher than the threshold. If the RSRP of multiple SSBs is higher than the threshold, the terminal can select any SSB with RSRP higher than the threshold. If there is no SSB with RSRP higher than the threshold, the terminal selects an SSB based on the implementation.

[0054] Based on the network configuration, the terminal obtains the correspondence between the SSB and the RO. After the terminal selects the SSB, the RO corresponding to the selected SSB is used as the RO for sending the PRACH (or Preamble). If the selected SSB is associated with multiple ROs, the terminal can select one of the ROs for PRACH (or Preamble) transmission.

[0055] Based on this, the technical solutions provided by the embodiments of the present application are described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0056] FIG2 is a flow chart of a method 200 for determining RO resources according to an exemplary embodiment of the present application. The method 200 may be, but is not limited to, executed by a terminal, specifically by hardware or software installed in the terminal. In this embodiment, the method 200 may include at least the following steps.

[0057] S210: The terminal receives target indication information.

[0058] The target indication information may be sent by a network side device, including but not limited to a PRACH mask index (Index) for indicating RO resources during PRACH repeated transmission.

[0059] In this embodiment, the RO resource can be indicated at various granularities using the PRACH mask index. For example, the RO resource can be indicated at the granularity of an RO group or an RO set. In other words, the RO resource indicated by the PRACH mask index includes an RO group, and the RO group includes multiple ROs used for repeated PRACH transmission.

[0060] For another example, the indication may be performed with RO as the granularity. That is, the RO resources indicated by the PRACH mask index may include one RO or multiple ROs, based on which the terminal may determine the RO group used for the PRACH repeated transmission according to the indicated one RO or multiple ROs.

[0061] It can be understood that, assuming that multiple RO groups are pre-configured in the terminal, then for the aforementioned situation of indicating with RO as the granularity, the multiple ROs indicated by the PRACH mask index can belong to different RO groups or the same RO group, which is not limited here.

[0062] In some embodiments, the PRACH mask index provided in this embodiment may be applicable to, but not limited to, RO resource indication during PRACH repeated transmission within a target range or scenario, wherein the target range or scenario is at least one of the following 01)-05).

[0063] 01) Target time window (time period), the target time window is a time window for determining the target RO group.

[0064] 02) Preset M RO groups, where M is an integer greater than or equal to 1.

[0065] In this embodiment, the M RO groups may be determined by numbering each M consecutive RO groups associated with each SSB as a unit, ie, the preset M RO groups.

[0066] 03) At least one SSB to RO mapping cycle.

[0067] 04) At least one SSB to RO association period.

[0068] 05) At least one SSB to RO association pattern period.

[0069] It can be understood that in the present application, the target time window may include one or more 1 SSB to RO association mode periods, a 1 SSB to RO association mode period may include one or more SSB to RO association periods, and an SSB to RO association period may include one or more SSB to RO mapping periods, which is not limited here.

[0070] S220: Determine a target RO group according to the PRACH mask index.

[0071] The target RO group is used for repeated transmission of the PRACH. That is, in this embodiment, the PRACH mask index can be used to indicate the RO resource during repeated transmission of the PRACH, so that the terminal and the network side device have the same understanding of the RO resource during repeated transmission of the PRACH, thereby ensuring communication performance.

[0072] It should be noted that, in this embodiment, the target RO group may be determined in different ways according to the different granularities or units of the PRACH mask index indication, which is not limited here.

[0073] In addition, in some embodiments, when the RO resource during PRACH repeated transmission is indicated by the PRACH mask index and the RO resource is shared by the 2-step random access procedure and the 4-step random access procedure, the RO resource indicated by the PRACH mask index is used for the 2-step random access procedure and is not used for the 4-step random access procedure. That is, for PRACH repeated transmissions in the 2-step random access procedure and the 4-step random access procedure, if they share the RO resource indicated by the PRACH mask index, then the 2-step random access procedure has a higher priority, that is, the RO resource is only used for PRACH repeated transmissions in the 2-step random access procedure and cannot be used for PRACH repeated transmissions in the 4-step random access procedure, thereby avoiding resource conflicts and ensuring the random access performance of the 2-step random access procedure.

[0074] Also, the PRACH mask mentioned in the context of this application may be the PRACH mask configured in the CBRA or the PRACH mask configured in the CFRA, and is not limited here.

[0075] In this embodiment, the target indication information is received by the terminal, and the target RO group is determined according to the RO resources indicated by the PRACH mask index in the target indication information. Thus, the indication of the RO resources during repeated transmission of the PRACH can be achieved, so that the terminal and the network side device have the same understanding of the RO resources during repeated transmission of the PRACH, thereby ensuring communication performance.

[0076] FIG3 is a flow chart of an RO resource method 300 provided in an exemplary embodiment of the present application. The method 300 may be, but is not limited to, executed by a terminal, specifically by hardware or software installed in the terminal. In this embodiment, the method 300 may include at least the following steps.

[0077] S310: The terminal receives target indication information.

[0078] The target indication information includes a PRACH mask index, and the PRACH mask index is used to indicate the RO resource during PRACH repeated transmission.

[0079] S320: Determine a target RO group according to the PRACH mask index.

[0080] The target RO group is used for the PRACH repeated transmission.

[0081] It is understood that the implementation process of S310-S320 can refer to the relevant description in the aforementioned method embodiment 200 and achieve the same or corresponding technical effects. Of course, in addition to referring to the relevant description in the aforementioned method embodiment 200, in some embodiments, depending on the different indication granularities when the PRACH mask index indicates the RO resource, the PRACH mask index can indicate the RO resource in multiple ways. The following describes the process of indicating the RO resource for different indication granularities in combination with Implementation 1 and Implementation 2.

[0082] Implementation method 1: Indication granularity is RO group

[0083] In the case where the PRACH mask index indicates that the RO resource has an indication granularity of RO group, if multiple RO groups are configured in the terminal, the RO group used for the PRACH repeated transmission can be indicated by the PRACH mask index indicating the corresponding RO group index or the PRACH mask index being a specific value or specific bit. The group index mentioned in the context of this application is used to identify or uniquely identify the RO group. The specific value can be implemented by protocol agreement, high-level configuration, or network-side configuration.

[0084] Based on this, in some embodiments, the indication method of the PRACH mask index may include but is not limited to at least one of the following methods 1 to 4.

[0085] Mode 1: Indicates that all RO groups associated with an SSB are available, wherein the SSB is related to the PRACH repeated transmission.

[0086] For example, assuming that the PRACH mask index is a first specific value, such as 13, the terminal determines that the PRACH mask index indicates that all RO groups associated with the SSB are available.

[0087] Mode 2: Indicates that the RO group associated with the SSB and having an odd group index is available.

[0088] For example, assuming that the PRACH mask index is a second specific value, such as 14, then the terminal determines that the PRACH mask index indicates that the RO group associated with the SSB and whose group index is an odd number is available. For example, assuming that the RO groups associated with the SSB include RO Group 1, RO Group 2, RO Group 3, and RO Group 4, then the PRACH mask index indicates that RO Group 1 and RO Group 3 are available.

[0089] Mode 3: Indicates that the RO group associated with the SSB and having an even group index is available.

[0090] For example, assuming that the PRACH mask index is a third specific value, such as 15, the terminal determines that the PRACH mask index indicates that the RO group associated with the SSB and whose group index is an even number is available. For example, assuming that the RO groups associated with the SSB include RO Group 1, RO Group 2, RO Group 3, and RO Group 4, the PRACH mask index indicates that RO Group 2 and RO Group 4 are available.

[0091] Method 4: Indicates that a specific RO group within the target range or scenario is available.

[0092] The target range may be determined by protocol agreement, high-level configuration, network-side configuration, etc. For example, in this embodiment, the target range or scenario may include but is not limited to at least one of the following 11)-15).

[0093] 11) Target time window, the target time window is a time window for determining the target RO group. That is, the PRACH mask index may be used to indicate whether one or more RO groups within the target time window are available.

[0094] 12) Preset M RO groups, where M is an integer greater than or equal to 1. That is, the PRACH mask index may be used to indicate that one or more RO groups among the M RO groups are available.

[0095] In this embodiment, the M RO groups may be determined by numbering each M consecutive RO groups associated with each SSB as a unit, ie, the preset M RO groups.

[0096] 13) At least one SSB to RO mapping period. That is, the PRACH mask index may indicate that one or more RO groups in at least one SSB to RO mapping period are available.

[0097] 14) At least one SSB to RO association period. That is, the PRACH mask index may indicate that one or more RO groups are available in at least one SSB to RO association period.

[0098] 15) At least one SSB to RO association pattern period. That is, the PRACH mask index may indicate that one or more RO groups in at least one SSB to RO association pattern period are available.

[0099] In addition, for the aforementioned methods 1 to 4, if the PRACH mask index indicates multiple available RO groups, the terminal may select one RO group from the multiple RO groups according to protocol agreement or autonomous determination for the PRACH repeated transmission.

[0100] For example, when the terminal autonomously selects an RO group from multiple RO groups, it may select an RO group as the target RO group from the multiple RO groups in a frequency domain first and then time domain manner, or in a time domain first and then frequency domain manner.

[0101] In some embodiments, for the aforementioned indication granularity of RO groups, the size of the RO group indicated by the PRACH mask index corresponds to the number of repetitions during PRACH retransmission. For example, assuming the number of PRACH retransmissions configured by the network is {4}, then the RO group size actually indicated by the PRACH mask index is the number of repetitions 4, i.e., the RO group actually indicated by the PRACH mask index includes 4 ROs or 4 valid ROs.

[0102] Alternatively, the size of the RO group indicated by the PRACH mask index corresponds to the maximum number of repetition transmissions among the multiple different repetition transmission counts corresponding to the PRACH repetition transmissions. That is, when the PRACH mask index, as a common PRACH mask index, is used to indicate multiple RO groups of different sizes, the size of the RO group actually indicated corresponds to or is the same as the maximum number of repetition transmissions among the multiple different repetition transmission counts corresponding to the PRACH repetition transmissions. Thus, by using a common PRACH mask index, the complexity of using the PRACH mask index to indicate RO resources can be reduced when configuring multiple PRACH repetition transmission counts.

[0103] For example, assuming that the number of PRACH retransmissions configured by the network is {2, 4, 8}, and different retransmission times use a common PRACH mask index to indicate the RO group, then the size of the RO group actually indicated by the PRACH mask index is the maximum retransmission number 8.

[0104] It can be understood that the size of the aforementioned RO group can be understood as the number of ROs included in the RO group or the number of valid ROs, which is not limited here.

[0105] In this case, if the RO group size indicated by the PRACH mask index corresponds to or is the same as the maximum number of repetition transmissions among the different numbers of repetition transmissions, then, when the terminal determines the target RO group according to the PRACH mask index, if the number of repetition transmissions of the PRACH repetition transmissions performed by the terminal is less than the maximum number of repetition transmissions, the terminal determines the target RO group according to some ROs in the RO group indicated by the PRACH mask index. The some ROs may be specified by a network configuration or a protocol.

[0106] For example, assuming that the number of repeated transmissions of PRACH configured by the network is {2, 4, 8}, different numbers of repeated transmissions use a common PRACH mask index to indicate the RO group, that is, the size of the RO group indicated by the PRACH mask index is 8, then if the number of PRACH repeated transmissions actually performed by the terminal is 2, the terminal can use 2 ROs in the RO group indicated by the PRACH mask index to perform repeated transmission of PRACH.

[0107] Implementation method 2: Indication granularity is RO

[0108] Wherein, when the indication granularity of the RO resource indicated by the PRACH mask index is RO, the PRACH mask index may indicate one RO or multiple ROs. For example, the manner in which the PRACH mask index indicates the RO resource may be as shown in Table 1.

[0109] Assume that the terminal is pre-configured with an association between SSBs and ROs, and within each SSB-to-RO mapping period, the ROs associated with each SSB are numbered first in the frequency domain (from low frequency to high frequency) and then in the time domain. Based on this, as shown in Table 1, the PRACH mask index value of 0 can represent that all ROs associated with the SSB are available.

[0110] The PRACH mask index value of 1 represents that the first RO associated with the SSB is available, and the remaining ROs are unavailable.

[0111] The PRACH mask index value of 2 indicates that the second RO associated with the SSB is available, and the remaining ROs are unavailable.

[0112] The PRACH mask index value of 3 indicates that the third RO associated with the SSB is available, and the remaining ROs are unavailable.

[0113] The PRACH mask index value of 4 represents that the fourth RO associated with the SSB is available, and the remaining ROs are unavailable.

[0114] The PRACH mask index value of 5 represents that the fifth RO associated with the SSB is available, and the remaining ROs are unavailable.

[0115] The PRACH mask index value of 6 represents that the sixth RO associated with the SSB is available, and the remaining ROs are unavailable.

[0116] The PRACH mask index value of 7 represents that the 7th RO associated with the SSB is available, and the remaining ROs are unavailable.

[0117] The PRACH mask index value of 8 represents that the 8th RO associated with the SSB is available, and the remaining ROs are unavailable.

[0118] The PRACH mask index value of 9 represents that an even-numbered RO associated with the SSB is available.

[0119] The PRACH mask index value of 10 represents that odd-numbered ROs associated with SSB are available, ...

[0120] The PRACH mask index values ​​11-15 are reserved bits.

[0121] Table 1 PRACH Mask index values

[0122] Based on this, after receiving the PRACH mask index, the terminal considers its indication granularity as RO. Therefore, the terminal can further determine the target RO group according to the RO indicated by the PRACH mask index, and its determination method may include but is not limited to at least one of the following methods 1-3.

[0123] Mode 1: The available RO group including the RO indicated by the PRACH mask index is used as the target RO group, and all ROs in the available RO group are after the current time, and the current time is the reception time of the target indication information.

[0124] For example, the RO group at the lowest frequency position or the highest frequency position associated with the selected SSB can be selected and as shown in Figure 4a, the RO resource indicated by the PRACH mask index at the current time t1 is the first RO in the SSB to RO mapping period, then, for SSB#0, the terminal can select SSB#0RO group#0 at the lowest frequency position, or SSB#0RO group#1 at the highest frequency position as the target RO group.

[0125] Mode 2: The RO indicated by the PRACH mask index is used as a starting RO, and the target RO group is determined based on the starting RO.

[0126] For example, as shown in Figure 4b, assuming that the number of repeated transmissions of PRACH is 2, the RO resource indicated by the PRACH mask index at the current time t1 is the second RO in the SSB to RO mapping period, then for SSB#0, the terminal can select RO#1 as the starting RO, and further determine {RO#1, RO#4} as the target RO group.

[0127] Mode 3: When the PRACH mask index indicates multiple ROs, the target RO group is determined according to available ROs in the multiple ROs.

[0128] The multiple ROs may be ROs corresponding to the same SSB to RO mapping period, or may be ROs corresponding to different SSB to RO mapping periods, which is not limited here.

[0129] For example, if the multiple ROs correspond to ROs in different SSB-to-RO mapping periods, referring again to Figure 4b, assuming the number of PRACH retransmissions is 2, the RO resource indicated by the PRACH mask index at the current time t1 is the second RO in the SSB-to-RO mapping period. Then, for SSB#0, RO#1 is the starting RO, RO#4 is an unavailable RO, and RO#5 is an available RO. Therefore, the terminal can group RO#1 and RO#5, which correspond to different SSB-to-RO mapping periods, into a target RO group. For SSB#1, the terminal can group RO#3 and RO#7, which correspond to different SSB-to-RO mapping periods, into a target RO group.

[0130] It is understandable that the terminal determines the target RO group based on which of the aforementioned methods 1 to 3, which can be achieved by protocol agreement, high-level configuration or network-side configuration, etc., and is not limited here.

[0131] Of course, if the terminal predetermines that there is a first RO group, and the first RO group includes unavailable ROs and available ROs indicated by the PRACH mask index, then the terminal can also execute any one of the following 21)-23). ​​This can solve the problem of unclear terminal behavior when the RO group includes an unavailable RO indicated by the PRACH mask index, thereby ensuring the smooth execution of PRACH repeated transmission.

[0132] 21) The terminal determines the first RO group as the target RO group. That is, when determining the target RO group, unavailable ROs may be counted in the target RO group.

[0133] Based on this, in some embodiments, considering that unavailable ROs are also counted in the target RO group, that is, the target RO group includes available ROs and unavailable ROs, when the terminal performs the PRACH repeated transmission operation based on determining the target RO group, it may include but is not limited to at least one of operations 1 to 3.

[0134] Operation 1: The terminal performs the PRACH retransmission on the available ROs in the target RO group except the unavailable RO. That is, the unavailable ROs indicated by the PRACH mask index can be counted in the target RO group, but the terminal actually only performs the PRACH retransmission on the available ROs indicated by the PRACH mask index.

[0135] Operation 2: The terminal performs PRACH retransmission on the unavailable ROs in the target RO group. That is, the terminal considers the unavailable ROs indicated by the PRACH mask index as available and counts them in the target RO group, and the terminal actually performs PRACH retransmission only on the unavailable ROs.

[0136] Operation 3: The terminal performs PRACH retransmission on all ROs in the target RO group. That is, the terminal considers that the unavailable RO indicated by the PRACH mask index is still available, and the terminal still performs PRACH retransmission on all ROs in the target RO group.

[0137] For example, referring to Figure 4c, assume that the number of ROs multiplexed in the frequency domain is 1, with a total of 2 SSBs, namely SSB#0 and SSB#1. Each SSB is associated with 4 consecutive ROs, and within one SSB-to-RO mapping period, the frequency domain positions of the 4 ROs associated with each SSB are the same. Based on this, if the RO resource indicated by the PRACH mask index at the current time t1 is the first RO in the SSB-to-RO mapping period, for example, for SSB#0, only RO#0 is available, and RO#1, RO#2, and RO#3 are unavailable. In this case, the terminal can form RO#0, RO#1, RO#2, and RO#3 into a target RO group, that is, the unavailable RO#1, RO#2, and RO#3 are still included in the statistics.

[0138] Based on this, for SSB#0, the terminal can send PRACH only on RO#0 in the target RO group, or send PRACH on RO#1, RO#2, and RO#3 in the target RO group, or send PRACH on RO#0, RO#1, RO#2, and RO#3 in the target RO group.

[0139] It should be noted that if the number of ROs available for PRACH transmission in the determined target RO group is less than the preset number of repeated transmissions of the PRACH, the actual number of PRACH transmissions may be less than the preset number of repeated transmissions of the PRACH.

[0140] 22) Determine the target RO group according to the available ROs in the first RO group and the available ROs in the second RO group, where the second RO group is located after the first RO group in terms of time.

[0141] That is, when determining the target RO group, unavailable ROs are not counted in the target RO group. Based on this, in order to smoothly execute the PRACH repeated transmission and avoid the situation where the size of the target RO group determined based on the available ROs in the first RO group is smaller than the number of repeated PRACH transmissions, the target RO group can be determined based on the available ROs in the first RO group and the available ROs in at least one second RO group.

[0142] For example, please refer to Figure 4b again. Assume that the number of repeated transmissions of PRACH is 2. For SSB#0, the first RO group includes RO#0 and RO#1, the second RO group includes RO#4 and RO#5, and the RO resource indicated by the PRACH mask index at the current time t1 is that the first RO in the SSB to RO mapping period is unavailable and the second RO is available. Then, for SSB#0, RO#1 is available and serves as the starting RO, RO#4 is an unavailable RO, and RO#5 is an available RO. Therefore, the terminal can form RO#1 in the first RO group and RO#5 in the second RO group into a target RO group.

[0143] 23) Determine that the first RO group cannot be used as the target RO group. That is, when an RO group contains an unavailable RO indicated by a PRACH mask index, the RO group is deemed invalid, that is, cannot be used for repeated PRACH transmission.

[0144] Of course, as to which of the above 21)-23) is actually used by the terminal to determine the target RO group, it can be determined by protocol agreement, high-level configuration or network-side configuration, and is not limited here.

[0145] In other embodiments, for the different indication methods mentioned in the aforementioned implementation methods, the RO resources indicated by the PRACH mask index are associated or correspond to the target SSB, and the target SSB may be part of all SSBs related to the PRACH repeated transmission.

[0146] For example, assuming there are four SSBs associated with the PRACH repeated transmission, such as {SSB#0, SSB#1, SSB#2, SSB#3}, the PRACH mask index may only indicate the RO resources associated with SSB#0 and SSB#1. Accordingly, the terminal may select the RO resource indicated by the PRACH mask index, such as the target RO group, from the RO resources associated with SSB#0 and SSB#1. This improves the flexibility or applicability of the PRACH mask index indication.

[0147] In some embodiments, when the RO resource indicated by the PRACH mask index is an RO corresponding to a combination of PRACH repeated transmission and other features, the target RO group further determined based on the RO resource indicated by the PRACH mask index also indicates the feature combination.

[0148] For example, please refer to Figure 4b again. The PRACH mask index indicates that RO#1 corresponds to the feature combination of PRACH repetition and message (Mg) 3 repetition at the current time t1. Then, the terminal further determines the target RO group as {RO#1, RO#4}. At this time, it is considered that {RO#1, RO#4} also indicates the feature combination of PRACH repetition and Msg3 repetition.

[0149] In this embodiment, when indicating RO resources for repeated PRACH transmission, different indication granularities are adopted, thereby improving the indication flexibility of RO resources.

[0150] Figure 5 is a flowchart of a method 500 for determining RO resources according to an exemplary embodiment of the present application. The method 500 may be, but is not limited to, executed by a terminal, specifically by hardware or software installed in the terminal. In this embodiment, the method 500 may include at least the following steps.

[0151] S510: The terminal receives target indication information, where the target indication information includes a PRACH mask index, and the PRACH mask index is used to indicate an RO resource during PRACH repeated transmission.

[0152] S520: Determine a target RO group according to the PRACH mask index, where the target RO group is used for the PRACH repeated transmission.

[0153] It can be understood that the implementation process of S510-S520 can refer to the relevant description in the aforementioned method embodiment 200 or 300, and achieve the same or corresponding technical effects. Of course, in addition to referring to the relevant description in the aforementioned method embodiment 200 or 300, in some embodiments, such as S521 shown in Figure 5, the present application can also determine whether to perform the step of determining the target RO group according to the PRACH mask index based on the first condition to determine the adaptability of the technical solution provided by the present application to its application scenario and ensure the effectiveness of the communication system.

[0154] S521: According to a first condition, determine whether to execute the step of determining a target RO group according to the PRACH mask index.

[0155] The first condition may include but is not limited to at least one of the following 31)-33).

[0156] 31) Whether a time offset value is configured; wherein the time offset value is related to the PRACH repeated transmission.

[0157] For example, when the time offset value is not configured, the terminal performs the step of determining the target RO group according to the PRACH mask index. That is, the network side device uses the PRACH mask index to indicate the RO resource during the PRACH repeated transmission.

[0158] Alternatively, when the time offset value is configured, the terminal does not perform the step of determining the target RO group according to the PRACH mask index. That is, the network side device does not use the PRACH mask index to indicate the RO resource during the PRACH repeated transmission.

[0159] 32) Whether there are ROs with the same frequency domain position among the ROs associated with the same SSB; wherein the SSB is related to the repeated transmission of the PRACH.

[0160] For example, in an SSB-to-RO mapping cycle, when there is no RO with the same frequency domain position among the ROs associated with the same SSB, the terminal performs the step of determining the target RO group according to the PRACH mask index. That is, the network-side device uses the PRACH mask index to indicate the RO resource during repeated PRACH transmission. This solves the problem in the related art that, when there may be ROs with the same frequency domain position among consecutive ROs associated with the same SSB, the RO group determined by the terminal may include unavailable ROs indicated by the PRACH Mask, thereby causing unclear terminal behavior.

[0161] Alternatively, when there are ROs with the same frequency domain position in the ROs associated with the same SSB, the terminal does not perform the step of determining the target RO group according to the PRACH mask index, that is, the network side device does not use the PRACH mask index to indicate the RO resources during repeated PRACH transmission.

[0162] For example, as shown in Figure 6, assume there are two SSBs, namely SSB#0 and SSB#1, the number of ROs multiplexed in the frequency domain is 2, and each SSB is associated with four consecutive ROs. Then, in an SSB-to-RO mapping cycle, ROs associated with the same SSB may have the same frequency domain position. In this case, the PRACH mask index cannot be used to indicate the RO resource for repeated PRACH transmission.

[0163] Based on this, in one implementation, whether there are ROs with the same frequency domain position among the ROs associated with the same SSB includes: whether there are ROs with the same frequency domain position among the ROs associated with the same SSB within a target period. The target period includes an SSB-to-RO mapping period, an SSB-to-RO association period, an SSB-to-RO association mode period, and a target time window, and the target time window is at least one of the time windows for determining the target RO group.

[0164] 33) Whether 1 / N is greater than the number of ROs for frequency domain multiplexing, where N is the number of SSBs associated with the same RO, wherein the RO is related to the repeated transmission of the PRACH.

[0165] Please refer to Figure 6 again. Assume there are two SSBs, SSB#0 and SSB#1, and the number of ROs used in the frequency domain is 2. Each SSB is associated with four consecutive ROs, that is, 1 / N = 4. In this case, the PRACH mask index cannot be used to indicate the RO resource for repeated PRACH transmission.

[0166] In other embodiments, the present application may also determine whether to determine the target RO group according to the PRACH mask index based on whether the second condition is met. For example, if the second condition is met, it is determined to perform the step of determining the target RO group according to the PRACH mask index or to determine to repeatedly transmit the PRACH. In this way, it is possible to avoid the presence of unavailable ROs indicated by the PRACH mask index in the target RO group determined by the terminal, so that the terminal can transmit PRACH on all ROs in the RO group, which is beneficial to the performance of PRACH repeated transmission.

[0167] The second condition may include that in one SSB to RO mapping period, there are at least two available ROs among the ROs indicated by the PRACH mask index and associated with the SSB, and the SSB is related to the PRACH repeated transmission.

[0168] That is to say, for repeated transmission of PRACH, in an SSB to RO mapping cycle, when there is more than one RO available among the ROs indicated by the PRACH mask index and associated with a certain SSB, PRACH repeated transmission is supported. For example, all ROs indicated by the PRACH mask index and associated with a certain SSB are available ROs, and PRACH repeated transmission is supported; conversely, when there is one RO available or no available RO among the ROs indicated by the PRACH mask index and associated with a certain SSB, PRACH repeated transmission is not supported.

[0169] For example, assuming that within an SSB to RO mapping cycle, the PRACH mask index can only indicate that all ROs associated with the SSB are available, or all odd-numbered ROs are available, or all even-numbered ROs are available, then, as shown in Figure 6, if the PRACH mask index indicates that only odd-numbered ROs are available, then the available ROs for SSB#0 are {SSB#0RO#0, SSB#0RO#2}, and the available ROs for SSB#1 are {SSB#1RO#0, SSB#1RO#2}, at which time PRACH repeated transmission may be allowed.

[0170] It is worth noting that when determining whether to execute S520, the judgment can be made based on the first condition or the second condition alone, or the first condition and the second condition can be combined for judgment, which is not limited here.

[0171] In this embodiment, when indicating the RO resources for PRACH repeated transmission, by limiting the application conditions of the PRACH mask index during PRACH repeated transmission, such as the aforementioned conditions 1 and 2, the effectiveness of PRACH repeated transmission can be improved.

[0172] Figure 7 is a flowchart of a method 700 for determining RO resources according to an exemplary embodiment of the present application. This method 700 may be, but is not limited to, executed by a network-side device, specifically hardware or software installed in the network-side device. In this embodiment, the method 700 may include at least the following steps.

[0173] S710: The network-side device sends target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate an RO resource during repeated PRACH transmission.

[0174] Optionally, when the PRACH mask index indicates that the indication granularity of the RO resource is an RO group, the indication method of the PRACH mask index includes at least one of the following: indicating that all RO groups associated with the SSB are available; indicating that the RO group associated with the SSB and whose group index is an odd number is available; indicating that the RO group associated with the SSB and whose group index is an even number is available; indicating that a specific RO group within the target range is available; wherein the SSB is related to the PRACH repeated transmission.

[0175] Optionally, the target range includes at least one of the following: a target time window, which is a time window for determining the target RO group; a preset M RO groups, where M is an integer greater than or equal to 1; at least one SSB to RO mapping period; at least one SSB to RO association period; and at least one SSB to RO association mode period.

[0176] Optionally, the size of the RO group indicated by the PRACH mask index corresponds to the number of repeated transmissions during the PRACH repeated transmission; or, the size of the RO group indicated by the PRACH mask index corresponds to the maximum number of repeated transmissions among multiple different numbers of repeated transmissions corresponding to the PRACH repeated transmission.

[0177] Optionally, when the 2-step random access procedure and the 4-step random access procedure share the RO resource, the RO resource indicated by the PRACH mask index is used for the 2-step random access procedure and is not used for the 4-step random access procedure.

[0178] Optionally, the RO resource indicated by the PRACH mask index is associated with a target SSB, and the target SSB is a part of all SSBs related to the PRACH repeated transmission.

[0179] Optionally, the method further includes: determining whether to execute the step of sending target indication information according to the first condition;

[0180] The first condition includes at least one of the following: whether a time offset value is configured; whether there are ROs with the same frequency domain position among the ROs associated with the same synchronization signal block SSB; whether 1 / N is greater than the number of ROs for frequency domain multiplexing, where N is the number of SSBs associated with the same RO; the time offset value, the SSB, and the RO are related to the repeated transmission of the PRACH.

[0181] Optionally, the method further includes: determining whether to execute the step of sending target indication information when a second condition is met; wherein the second condition includes that in one SSB to RO mapping cycle, there are at least two available ROs in the RO indicated by the PRACH mask index and associated with the SSB, and the SSB is related to the repeated transmission of the PRACH.

[0182] It can be understood that method embodiment 700 has the same or corresponding technical features as the aforementioned method embodiments 200, 300 or 500. Therefore, the implementation process of each implementation method in method embodiment 700 can refer to the relevant description in the aforementioned method embodiments 200, 300 or 500, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0183] The method for determining physical random access channel transmission opportunity (RO) resources provided in the embodiments of the present application may be performed by a device for determining physical random access channel transmission opportunity (RO) resources. In the embodiments of the present application, the device for determining physical random access channel transmission opportunity (RO) resources is used as an example to illustrate the method for determining physical random access channel transmission opportunity (RO) resources.

[0184] As shown in Figure 8, a structural diagram of an apparatus 800 for determining physical random access channel transmission opportunity RO resources provided in an embodiment of the present application is provided. The apparatus 800 includes: a receiving module 810, configured to receive target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate the RO resources during PRACH repeated transmission; and a determining module 820, configured to determine a target RO group according to the PRACH mask index, and the target RO group is used for the PRACH repeated transmission.

[0185] Optionally, the determination module 820 is further used to determine whether to perform the step of determining the target RO group according to the PRACH mask index based on a first condition; wherein the first condition includes at least one of the following: whether a time offset value is configured; whether there are ROs with the same frequency domain position in the ROs associated with the same synchronization signal block SSB; whether 1 / N is greater than the number of ROs for frequency domain multiplexing, and N is the number of SSBs associated with the same RO; wherein the time offset value, the SSB, and the RO are related to the repeated transmission of the PRACH.

[0186] Optionally, whether there are ROs with the same frequency domain position in the ROs associated with the same SSB includes: whether there are ROs with the same frequency domain position in the ROs associated with the same SSB within the target period; wherein the target period includes at least one of the following: SSB to RO mapping period; SSB to RO association period; SSB to RO association mode period; target time window, and the target time window is the time window for determining the target RO group.

[0187] Optionally, the determination module 820 is also used to determine the execution of the step of determining the target RO group according to the PRACH mask index when a second condition is met; wherein the second condition includes that in one SSB to RO mapping cycle, there are at least two available ROs in the RO indicated by the PRACH mask index and associated with the SSB, and the SSB is related to the PRACH repeated transmission.

[0188] Optionally, when the PRACH mask index indicates that the indication granularity of the RO resource is an RO group, the indication method of the PRACH mask index includes at least one of the following: indicating that all RO groups associated with the SSB are available; indicating that the RO group associated with the SSB and whose group index is an odd number is available; indicating that the RO group associated with the SSB and whose group index is an even number is available; indicating that a specific RO group within the target range is available; wherein the SSB is related to the PRACH repeated transmission.

[0189] Optionally, the target range includes at least one of the following: a target time window, which is a time window for determining the target RO group; a preset M RO groups, where M is an integer greater than or equal to 1; at least one SSB to RO mapping period; at least one SSB to RO association period; and at least one SSB to RO association mode period.

[0190] Optionally, the size of the RO group indicated by the PRACH mask index corresponds to the number of repeated transmissions during the PRACH repeated transmission; or, the size of the RO group indicated by the PRACH mask index corresponds to the maximum number of repeated transmissions among multiple different numbers of repeated transmissions corresponding to the PRACH repeated transmission.

[0191] Optionally, when the RO group size indicated by the PRACH mask index corresponds to the maximum number of repeated transmissions among the different repeated transmission times, the determination module 820 determines the target RO group based on the PRACH mask index, including: if the number of repeated transmissions of the PRACH repeated transmission performed by the terminal is less than the maximum number of repeated transmissions, then determining the target RO group based on part of the ROs in the RO group indicated by the PRACH mask index.

[0192] Optionally, in the case where the PRACH mask index indicates that the indication granularity of the RO resource is RO, the determination module 820 determines the target RO group according to the PRACH mask index, including at least one of the following: taking the available RO group including the RO indicated by the PRACH mask index as the target RO group, all ROs in the available RO group are after the current time, and the current time is the reception time of the target indication information; taking the RO indicated by the PRACH mask index as the starting RO, and determining the target RO group based on the Starting RO; in the case where the PRACH mask index indicates multiple ROs, determining the target RO group according to the available ROs among the multiple ROs.

[0193] Optionally, the multiple ROs correspond to different SSB to RO mapping periods respectively.

[0194] Optionally, the determination module 820 determines the target RO group according to the PRACH mask index, including: when the terminal pre-determines that there is a first RO group, and the first RO group includes an unavailable RO and an available RO indicated by the PRACH mask index, the terminal performs any one of the following items: determining that the first RO group is the target RO group; determining that the first RO group cannot be used as the target RO group; determining the target RO group based on the available ROs in the first RO group and the available ROs in the second RO group, and the second RO group is located after the first RO group in time.

[0195] Optionally, when it is determined that the first RO group is the target RO group, the device also includes: a sending module, used to perform the PRACH repeated transmission on the available ROs in the target RO group except the unavailable RO; or, perform the PRACH repeated transmission on the unavailable ROs in the target RO group; or, perform the PRACH repeated transmission on all ROs in the target RO group.

[0196] Optionally, when the 2-step random access procedure and the 4-step random access procedure share the RO resource, the RO resource indicated by the PRACH mask index is used for the 2-step random access procedure and is not used for the 4-step random access procedure.

[0197] Optionally, the RO resource indicated by the PRACH mask index is associated with a target SSB, and the target SSB is a part of all SSBs related to the PRACH repeated transmission.

[0198] The apparatus 800 for determining physical random access channel transmission opportunity (RO) resources in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component of an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal or other device other than a terminal. For example, the terminal can include, but is not limited to, the types of terminal 11 listed above. Other devices can include servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0199] The device 800 for determining physical random access channel transmission opportunity RO resources provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 2 to 5 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0200] As shown in Figure 9, it is a structural diagram of a device 900 for determining physical random access channel transmission opportunity RO resources provided in an embodiment of the present application. The device 900 includes: a sending module 910, which is used to send target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate the RO resources during repeated PRACH transmission.

[0201] Optionally, when the PRACH mask index indicates that the indication granularity of the RO resource is an RO group, the indication method of the PRACH mask index includes at least one of the following: indicating that all RO groups associated with the SSB are available; indicating that the RO group associated with the SSB and whose group index is an odd number is available; indicating that the RO group associated with the SSB and whose group index is an even number is available; indicating that a specific RO group within the target range is available; wherein the SSB is related to the PRACH repeated transmission.

[0202] Optionally, the target range includes at least one of the following: a target time window, which is a time window for determining the target RO group; a preset M RO groups, where M is an integer greater than or equal to 1; at least one SSB to RO mapping period; at least one SSB to RO association period; and at least one SSB to RO association mode period.

[0203] Optionally, the size of the RO group indicated by the PRACH mask index corresponds to the number of repeated transmissions during the PRACH repeated transmission; or, the size of the RO group indicated by the PRACH mask index corresponds to the maximum number of repeated transmissions among multiple different numbers of repeated transmissions corresponding to the PRACH repeated transmission.

[0204] Optionally, when the 2-step random access procedure and the 4-step random access procedure share the RO resource, the RO resource indicated by the PRACH mask index is used for the 2-step random access procedure and is not used for the 4-step random access procedure.

[0205] Optionally, the RO resource indicated by the PRACH mask index is associated with a target SSB, and the target SSB is a part of all SSBs related to the PRACH repeated transmission.

[0206] The apparatus 900 for determining physical random access channel transmission opportunity (RO) resources in the embodiment of the present application may be a network-side device. For example, the network-side device may include but is not limited to the types of network-side devices 12 listed above.

[0207] The device 900 for determining physical random access channel transmission opportunity RO resources provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 7 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0208] As shown in Figure 10, an embodiment of the present application further provides a communication device 1000, including a processor 1001 and a memory 1002. The memory 1002 stores a program or instruction that can be executed on the processor 1001. For example, when the communication device 1000 is a terminal, the program or instruction, when executed by the processor 1001, implements the various steps of the embodiment of the method for determining the physical random access channel transmission opportunity RO resources, and can achieve the same technical effect. When the communication device 1000 is a network-side device, the program or instruction, when executed by the processor 1001, implements the various steps of the embodiment of the method for determining the physical random access channel transmission opportunity RO resources, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0209] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiments shown in Figures 2-5. This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment can be applied to this terminal embodiment and achieve the same technical effects. Specifically, Figure 11 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0210] The terminal 1100 includes but is not limited to: a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109 and at least some of the components of the processor 1110.

[0211] Those skilled in the art will appreciate that the terminal 1100 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1110 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG11 does not limit the terminal. The terminal may include more or fewer components than shown, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0212] It should be understood that in an embodiment of the present application, the input unit 1104 may include a graphics processing unit (GPU) 11041 and a microphone 11042, and the graphics processor 11041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1107 includes a touch panel 11071 and at least one of other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 may include two parts: a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0213] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1101 may transmit the data to the processor 1110 for processing. Furthermore, the RF unit 1101 may send uplink data to the network-side device. Typically, the RF unit 1101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0214] The memory 1109 can be used to store software programs or instructions and various data. The memory 1109 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1109 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 1109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0215] Processor 1110 may include one or more processing units. Optionally, processor 1110 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1110.

[0216] Among them, the radio frequency unit 1101 is used to receive target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate the RO resource during PRACH repeated transmission; the processor 1110 is used to determine the target RO group according to the PRACH mask index, and the target RO group is used for the PRACH repeated transmission.

[0217] Optionally, the processor 1110 is further used to determine whether to perform the step of determining the target RO group according to the PRACH mask index based on a first condition; wherein the first condition includes at least one of the following: whether a time offset value is configured; whether there are ROs with the same frequency domain position in the ROs associated with the same synchronization signal block SSB; whether 1 / N is greater than the number of ROs for frequency domain multiplexing, and N is the number of SSBs associated with the same RO; wherein the time offset value, the SSB, and the RO are related to the repeated transmission of the PRACH.

[0218] Optionally, whether there are ROs with the same frequency domain position in the ROs associated with the same SSB includes: whether there are ROs with the same frequency domain position in the ROs associated with the same SSB within the target period; wherein the target period includes at least one of the following: SSB to RO mapping period; SSB to RO association period; SSB to RO association mode period; target time window, and the target time window is the time window for determining the target RO group.

[0219] Optionally, the processor 1110 is also used to determine to execute the step of determining the target RO group according to the PRACH mask index when a second condition is met; wherein the second condition includes that in one SSB to RO mapping cycle, there are at least two available ROs in the RO indicated by the PRACH mask index and associated with the SSB, and the SSB is related to the PRACH repeated transmission.

[0220] Optionally, when the PRACH mask index indicates that the indication granularity of the RO resource is an RO group, the indication method of the PRACH mask index includes at least one of the following: indicating that all RO groups associated with the SSB are available; indicating that the RO group associated with the SSB and whose group index is an odd number is available; indicating that the RO group associated with the SSB and whose group index is an even number is available; indicating that a specific RO group within the target range is available; wherein the SSB is related to the PRACH repeated transmission.

[0221] Optionally, the target range includes at least one of the following: a target time window, which is a time window for determining the target RO group; a preset M RO groups, where M is an integer greater than or equal to 1; at least one SSB to RO mapping period; at least one SSB to RO association period; and at least one SSB to RO association mode period.

[0222] Optionally, the size of the RO group indicated by the PRACH mask index corresponds to the number of repeated transmissions during the PRACH repeated transmission; or, the size of the RO group indicated by the PRACH mask index corresponds to the maximum number of repeated transmissions among multiple different numbers of repeated transmissions corresponding to the PRACH repeated transmission.

[0223] Optionally, when the RO group size indicated by the PRACH mask index corresponds to the maximum number of repeated transmissions among the different repeated transmission times, the processor 1110 determines the target RO group based on the PRACH mask index, including: if the number of repeated transmissions of the PRACH repeated transmission performed by the terminal is less than the maximum number of repeated transmissions, then determining the target RO group based on part of the ROs in the RO group indicated by the PRACH mask index.

[0224] Optionally, when the PRACH mask index indicates that the indication granularity of the RO resource is RO, the processor 1110 determines the target RO group according to the PRACH mask index, including at least one of the following: taking the available RO group including the RO indicated by the PRACH mask index as the target RO group, all ROs in the available RO group are after the current time, and the current time is the reception time of the target indication information; taking the RO indicated by the PRACH mask index as the starting RO, and determining the target RO group based on the Starting RO; when the PRACH mask index indicates multiple ROs, determining the target RO group according to the available ROs among the multiple ROs.

[0225] Optionally, the multiple ROs correspond to different SSB to RO mapping periods respectively.

[0226] Optionally, the processor 1110 determines the target RO group according to the PRACH mask index, including: when the terminal pre-determines that there is a first RO group, and the first RO group includes an unavailable RO and an available RO indicated by the PRACH mask index, the terminal performs any one of the following items: determining that the first RO group is the target RO group; determining that the first RO group cannot be used as the target RO group; determining the target RO group according to the available ROs in the first RO group and the available ROs in the second RO group, and the second RO group is located after the first RO group in time.

[0227] Optionally, when it is determined that the first RO group is the target RO group, the device further includes: a radio frequency unit 1101, used to perform the PRACH repeated transmission on the available ROs in the target RO group except the unavailable RO; or, perform the PRACH repeated transmission on the unavailable ROs in the target RO group; or, perform the PRACH repeated transmission on all ROs in the target RO group.

[0228] Optionally, when the 2-step random access procedure and the 4-step random access procedure share the RO resource, the RO resource indicated by the PRACH mask index is used for the 2-step random access procedure and is not used for the 4-step random access procedure.

[0229] Optionally, the RO resource indicated by the PRACH mask index is associated with a target SSB, and the target SSB is a part of all SSBs related to the PRACH repeated transmission.

[0230] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiments 200-400, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0231] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG7 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0232] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 12, network-side device 1200 includes an antenna 1201, a radio frequency device 1202, a baseband device 1203, a processor 1204, and a memory 1205. Antenna 1201 is connected to radio frequency device 1202. In the uplink direction, radio frequency device 1202 receives information via antenna 1201 and sends the received information to baseband device 1203 for processing. In the downlink direction, baseband device 1203 processes the information to be transmitted and sends it to radio frequency device 1202. Radio frequency device 1202 processes the received information and then sends it through antenna 1201.

[0233] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1203 , which includes a baseband processor.

[0234] The baseband device 1203 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 12, one of which is, for example, a baseband processor, which is connected to the memory 1205 through a bus interface to call the program in the memory 1205 and execute the network device operations shown in the above method embodiment.

[0235] The network side device may further include a network interface 1206 , which is, for example, a Common Public Radio Interface (CPRI).

[0236] Specifically, the network side device 1200 of the embodiment of the present application also includes: instructions or programs stored in the memory 1205 and executable on the processor 1204. The processor 1204 calls the instructions or programs in the memory 1205 to execute the method of execution of each module shown in Figure 8 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0237] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by the processor, the various processes of the embodiment of the method for determining the RO resources of the above-mentioned physical random access channel transmission opportunity are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0238] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0239] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run a program or instruction to implement the various processes of the above-mentioned embodiment of the method for determining the RO resources of the physical random access channel transmission opportunity, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0240] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0241] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned embodiment of the method for determining the RO resources of the physical random access channel transmission opportunity, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0242] An embodiment of the present application also provides a communication system, including: a terminal and a network-side device, wherein the terminal implements the various processes of embodiments 200-500 of the above-mentioned method for determining RO resources of the physical random access channel transmission opportunity, and the network-side device implements the various processes of embodiment 700 of the above-mentioned method for determining RO resources of the physical random access channel transmission opportunity and can achieve the same technical effect. To avoid repetition, they will not be repeated here.

[0243] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0244] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0245] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for determining a physical random access channel transmission opportunity RO resource, comprising: The terminal receives target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate an RO resource during repeated transmission of the PRACH; A target RO group is determined according to the PRACH mask index, and the target RO group is used for the PRACH repeated transmission.

2. The method of claim 1, wherein: The method further comprises: According to the first condition, determining whether to perform the step of determining the target RO group according to the PRACH mask index; The first condition includes at least one of the following: Whether the time offset value is configured; Whether there are ROs with the same frequency domain position among multiple ROs associated with the same synchronization signal block SSB; Whether 1 / N is greater than the number of ROs for frequency domain multiplexing, where N is the number of SSBs associated with the same RO; Among them, the time offset value, the SSB, and the RO are related to the PRACH repeated transmission.

3. The method of claim 2, wherein: Whether there are ROs with the same frequency domain position in the ROs associated with the same SSB includes: Whether there are ROs with the same frequency domain position among the ROs associated with the same SSB during the target period; The target period includes at least one of the following: SSB to RO mapping cycle; SSB to RO association period; SSB to RO association mode cycle; A target time window, where the target time window is a time window for determining the target RO group.

4. The method according to any one of claims 1 to 3, wherein: The method further comprises: If the second condition is met, determine to perform the step of determining the target RO group according to the PRACH mask index; The second condition includes that in one SSB to RO mapping cycle, there are at least two available ROs in the ROs indicated by the PRACH mask index and associated with the SSB, and the SSB is related to the repeated transmission of the PRACH.

5. The method according to any one of claims 1 to 4, wherein: In the case where the PRACH mask index indicates that the indication granularity of the RO resource is an RO group, the indication manner of the PRACH mask index includes at least one of the following: Indicates that all RO groups associated with the SSB are available; Indicates that the RO group associated with the SSB and with an odd group index is available; Indicates that the RO group associated with the SSB and with an even-numbered group index is available; Indicates that a specific RO group within the target range is available; Among them, the SSB is related to the PRACH repeated transmission.

6. The method of claim 5, wherein: The target scope includes at least one of the following: A target time window, wherein the target time window is a time window for determining the target RO group; There are M preset RO groups, where M is an integer greater than or equal to 1; At least 1 SSB to RO mapping cycle; At least 1 SSB to RO association period; At least 1 SSB to RO association mode period.

7. The method according to any one of claims 1 to 6, wherein: The size of the RO group indicated by the PRACH mask index corresponds to the number of repeated transmissions when the PRACH is repeatedly transmitted; or, The size of the RO group indicated by the PRACH mask index corresponds to a maximum number of repetition transmissions among a plurality of different numbers of repetition transmissions corresponding to the PRACH repetition transmissions.

8. The method of claim 7, wherein: In a case where the RO group size indicated by the PRACH mask index corresponds to a maximum number of repeated transmissions among the different numbers of repeated transmissions, determining a target RO group according to the PRACH mask index comprises: If the number of repeated transmissions of the PRACH repeated transmissions performed by the terminal is less than the maximum number of repeated transmissions, the terminal determines the target RO group according to part of the ROs in the RO group indicated by the PRACH mask index.

9. The method according to any one of claims 1 to 4, wherein: In a case where the PRACH mask index indicates that the indication granularity of the RO resource is RO, determining the target RO group according to the PRACH mask index includes at least one of the following: Using an available RO group including the RO indicated by the PRACH mask index as the target RO group, all ROs in the available RO group are after the current time, and the current time is the reception time of the target indication information; Taking the RO indicated by the PRACH mask index as a starting RO, and determining the target RO group based on the Starting RO; In case that the PRACH mask index indicates a plurality of ROs, the target RO group is determined according to available ROs among the plurality of ROs.

10. The method of claim 9, wherein: The multiple ROs correspond to different SSB to RO mapping periods respectively.

11. The method according to any one of claims 1 to 10, wherein: Determining a target RO group according to the PRACH mask index includes: In a case where the terminal predetermines a first RO group, and the first RO group includes unavailable ROs and available ROs indicated by the PRACH mask index, the terminal performs any one of the following: Determining that the first RO group cannot be used as the target RO group; Determining the first RO group as the target RO group; The target RO group is determined according to available ROs in the first RO group and available ROs in a second RO group, where the second RO group is located after the first RO group in time.

12. The method of claim 11, wherein: In the case where the first RO group is determined to be the target RO group, the method further includes: The terminal performs repeated transmission of the PRACH on available ROs other than the unavailable ROs in the target RO group; or, The terminal performs the PRACH repeated transmission on an unavailable RO in the target RO group; or, The terminal repeatedly transmits the PRACH on all ROs in the target RO group.

13. The method according to any one of claims 1 to 12, wherein: When the 2-step random access procedure and the 4-step random access procedure share the RO resource, the RO resource indicated by the PRACH mask index is used for the 2-step random access procedure and is not used for the 4-step random access procedure.

14. The method according to any one of claims 1 to 13, wherein: The RO resources indicated by the PRACH mask index are associated with a target SSB, and the target SSB is a part of all SSBs associated with the PRACH repeated transmission.

15. A method for determining a physical random access channel transmission opportunity RO resource, comprising: The network side device sends target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate the RO resource during PRACH repeated transmission.

16. The method of claim 15, wherein: In the case where the PRACH mask index indicates that the indication granularity of the RO resource is an RO group, the indication manner of the PRACH mask index includes at least one of the following: Indicates that all RO groups associated with the SSB are available; Indicates that the RO group associated with the SSB and with an odd group index is available; Indicates that the RO group associated with the SSB and with an even-numbered group index is available; Indicates that a specific RO group within the target range is available; Among them, the SSB is related to the PRACH repeated transmission.

17. The method of claim 16, wherein: The target scope includes at least one of the following: A target time window, wherein the target time window is a time window for determining the target RO group; There are M preset RO groups, where M is an integer greater than or equal to 1; At least 1 SSB to RO mapping cycle; At least 1 SSB to RO association period; At least 1 SSB to RO association mode period.

18. The method according to any one of claims 15 to 17, wherein: The size of the RO group indicated by the PRACH mask index corresponds to the number of repeated transmissions when the PRACH is repeatedly transmitted; or, The size of the RO group indicated by the PRACH mask index corresponds to a maximum number of repetition transmissions among a plurality of different numbers of repetition transmissions corresponding to the PRACH repetition transmissions.

19. The method according to any one of claims 15 to 18, wherein: When the 2-step random access procedure and the 4-step random access procedure share the RO resource, the RO resource indicated by the PRACH mask index is used for the 2-step random access procedure and is not used for the 4-step random access procedure.

20. The method according to any one of claims 15 to 19, wherein: The RO resources indicated by the PRACH mask index are associated with a target SSB, and the target SSB is a part of all SSBs associated with the PRACH repeated transmission.

21. A device for determining a physical random access channel transmission opportunity RO resource, comprising: A receiving module, configured to receive target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate an RO resource during repeated transmission of the PRACH; The determination module is used to determine a target RO group according to the PRACH mask index, and the target RO group is used for the PRACH repeated transmission.

22. A device for determining a physical random access channel transmission opportunity RO resource, comprising: The sending module is used to send target indication information, wherein the target indication information includes a physical random access channel PRACH mask index, and the PRACH mask index is used to indicate the RO resource during PRACH repeated transmission.

23. A terminal comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method according to any one of claims 1 to 14 are implemented.

24. A network side device, comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in any one of claims 15 to 20 are implemented.

25. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the steps of the method according to any one of claims 1 to 14, or implements the steps of the method according to any one of claims 15 to 20.

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