Method and terminal for determining time-frequency resources for Msg1 repetitive transmission

Abstract

The present application discloses a method, device, and terminal for determining time-frequency resources for Msg1 repeated transmission, which belong to the technical field of communications. A method for determining time-frequency resources for Msg1 repeated transmission in an embodiment of the present application includes a step of a terminal receiving a first message, which is transmitted from a network side device and carries first configuration information for Msg1 repeated transmission, and a step of the terminal determining a first time-frequency resource for Msg1 repeated transmission based on the first configuration information. The step of determining the first time-frequency resource for Msg1 repeated transmission includes at least one of the following steps: determining whether to perform Msg1 repeated transmission; determining a physical random access channel (PRACH) resource for Msg1 repeated transmission; and determining a frequency hopping parameter for Msg1 repeated transmission.

Description

[Technical field]

[0001] The present application relates to the technical field of communications, and in particular to a method, device, and terminal for determining time-frequency resources for Msg1 repetitive transmission. [Background technology]

[0002] NR supports two types of random access procedures: 4-step RA type (4-step RACH) of Msg1 and 2-step RA type (2-step RACH) of MsgA. Both types of RA procedures support contention based random access (CBRA) and contention free random access (CFRA). The 2-step RACH procedure is generally applied in areas with good coverage to shorten terminal access time. In areas with poor signal coverage, terminals should use the 4-step RACH procedure to access the cell.

[0003] In the related art, Msg1 is always transmitted once, and a Random Access Response (RAR) monitoring window is turned on after Msg1 is transmitted. The single transmission of Msg1 is limited by coverage performance, and there is a problem that the success rate of Msg1 detection is low at the cell boundary, which may affect the access of terminals at the cell boundary to the cell. Repeated transmission of Msg1 is a method for improving the coverage performance of the physical random-access channel (PRACH), but it is necessary to solve how to realize repeated transmission of Msg1. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present application provide a method, device and terminal for determining time-frequency resources for Msg1 repeated transmission, which can solve the problem of how to realize Msg1 repeated transmission. [Means for solving the problem]

[0005] In a first aspect, a method for determining a time-frequency resource for Msg1 repetition transmission applied to a terminal, comprising: A terminal receives a first message transmitted from a network side device, the first message including first configuration information of Msg1 repeated transmission; The terminal determines a first time-frequency resource for repeated transmission of Msg1 based on the first configuration information; The step of determining a first time-frequency resource for repeated transmission of Msg1 includes: determining whether to perform repeated transmission of Msg1; determining a physical random access channel (PRACH) resource for Msg1 repetition transmission; determining a frequency hopping parameter for the Msg1 repeated transmission.

[0006] In a second aspect, a method for determining a time-frequency resource for Msg1 repetition transmission applied to a network side device, comprising the steps of: A method for determining time-frequency resources for repeated transmission of Msg1 is provided, the method including a step of a network side device transmitting a first message carrying first configuration information for repeated transmission of Msg1 to a terminal.

[0007] In a third aspect, A first receiving unit is used to receive a first message including first arrangement information of Msg1 repeated transmission, the first message being transmitted from a network side device; a first determination unit used to determine a first time-frequency resource for Msg1 repetitive transmission based on the first configuration information, Determining a first time-frequency resource for the repeated transmission of Msg1 includes: determining whether to perform repeated transmission of Msg1; determining a physical random access channel (PRACH) resource for Msg1 repetition transmission; and determining a frequency hopping parameter of the Msg1 repeated transmission.

[0008] In a fourth aspect, A device for determining time-frequency resources for Msg1 repeated transmission is provided, the device comprising a first transmitting unit used for transmitting a first message carrying first configuration information for Msg1 repeated transmission to a terminal.

[0009] In a fifth aspect, there is provided a terminal comprising a processor and a memory, wherein a program or command executable by the processor is stored in the memory, and when the program or command is executed by the processor, the terminal realizes the steps of the method for determining time-frequency resources for Msg1 repetitive transmission described in the first aspect.

[0010] In a sixth aspect, a terminal is provided, the terminal comprising: a communication interface used for receiving a first message carrying first configuration information for Msg1 repeated transmission, transmitted from a network side device; and a processor used for determining a first time-frequency resource for Msg1 repeated transmission based on the first configuration information, wherein determining the first time-frequency resource for Msg1 repeated transmission includes at least one of determining whether to perform Msg1 repeated transmission, determining a physical random access channel (PRACH) resource for Msg1 repeated transmission, and determining a frequency hopping parameter for Msg1 repeated transmission.

[0011] In a seventh aspect, there is provided a network side device comprising a processor and a memory, wherein a program or command executable by the processor is stored in the memory, and when the program or command is executed by the processor, the network side device realizes the steps of the method for determining time-frequency resources for Msg1 repetitive transmission described in the second aspect.

[0012] In an eighth aspect, there is provided a network side device including a processor and a communication interface used for transmitting a first message carrying first arrangement information of Msg1 repeated transmission to a terminal.

[0013] In a ninth aspect, there is provided a system for determining a time-frequency resource for Msg1 repeated transmission, comprising: a terminal used for executing steps of the method for determining a time-frequency resource for Msg1 repeated transmission described in the first aspect; and a network side device used for executing steps of the method for determining a time-frequency resource for Msg1 repeated transmission described in the second aspect.

[0014] In a tenth aspect, there is provided a readable storage medium having a program or command stored thereon, the program or command being executed by a processor to realize steps of the method for determining a time-frequency resource for Msg1 repeated transmission described in the first aspect, or to realize steps of the method for determining a time-frequency resource for Msg1 repeated transmission described in the second aspect.

[0015] In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, wherein the communication interface and the processor are coupled to each other, and the processor executes a program or command to realize the method for determining a time-frequency resource for Msg1 repeated transmission described in the first aspect, or to realize the method for determining a time-frequency resource for Msg1 repeated transmission described in the second aspect.

[0016] In a twelfth aspect, there is provided a computer program / program product stored on a storage medium, the computer program / program product being executed by at least one processor to realize steps of the method for determining time-frequency resources for Msg1 repeated transmission described in the first aspect, or to realize steps of the method for determining time-frequency resources for Msg1 repeated transmission described in the second aspect. Effect of the Invention

[0017] In an embodiment of the present application, a terminal determines a first time-frequency resource for repeated transmission of Msg1 based on first configuration information of repeated transmission of Msg1 transmitted from a network side device, thereby realizing repeated transmission of Msg1 and improving the coverage performance of PRACH. [Brief description of the drawings]

[0018] [Figure 1] 1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied. [Diagram 2]1 is a flowchart 1 of a method for determining time-frequency resource of Msg1 repetition transmission provided in an embodiment of the present application; [Diagram 3] FIG. 13 is an exemplary diagram of determining the time domain location of ROs of Msg1 repeated transmissions associated with the same SSB provided in an embodiment of the present application. [Figure 4] FIG. 13 is an exemplary diagram of determining the time domain location of ROs of Msg1 repetition transmissions associated with different SSBs provided in an embodiment of the present application. [Diagram 5] FIG. 1 is a schematic diagram of RO frequency hopping provided in an embodiment of the present application. [Figure 6] FIG. 2 is a schematic diagram of RO frequency hopping provided in an embodiment of the present application. [Figure 7] 2 is a flowchart 2 of a method for determining time-frequency resources for Msg1 repetition transmission provided in an embodiment of the present application; [Figure 8] FIG. 1 is a schematic diagram of the configuration of a device for determining time-frequency resources for Msg1 repetition transmission provided in an embodiment of the present application; [Figure 9] FIG. 2 is a schematic diagram of the configuration of a device for determining time-frequency resources for Msg1 repetition transmission provided in an embodiment of the present application; [Figure 10] FIG. 2 is a schematic diagram of the configuration of a communication device provided in an embodiment of the present application. [Figure 11] FIG. 2 is a schematic diagram of a hardware configuration of a terminal for implementing an embodiment of the present application. [Figure 12] FIG. 2 is a schematic diagram of the configuration of a network side device provided in an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, the technical solutions in the embodiments of the present application will be clearly described with reference to the drawings in the embodiments of the present application, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art are within the scope of protection of the present application.

[0020] The terms "first", "second", and the like in the specification and claims of the present application are not intended to describe a particular order or sequence, but are intended to distinguish between similar objects. It should be understood that the terms used in this manner may be substituted for each other where appropriate, so that the embodiments of the present application may be performed in an order other than that shown or described herein, and the objects distinguished by "first" and "second" are generally of one type, and the number of objects is not limited, for example, the first object may be one or more. In the specification and claims, "and / or" indicates at least one of the objects connected, and the symbol " / " generally indicates that the related objects before and after are in an "or" relationship.

[0021] It should be noted that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and can 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), and other systems. The terms "system" and "network" in the embodiments of the present application can generally be used interchangeably, and the technology described can be used in the above-mentioned systems and wireless technologies, or in other systems and wireless technologies. However, in the following description, a New Radio (NR) system will be described for illustrative purposes, and NR terminology will be used in most of the following description, but these technologies may be applied to systems other than NR systems, such as 6th Generation (6G) communication systems.

[0022] 1 is a block diagram of a wireless communication system to which the embodiment of the present application can be applied. The wireless communication system includes a terminal 11 and a network side device 12. Here, the terminal 11 may be a terminal device such as a mobile phone, a tablet computer, a laptop computer also called a notebook computer, a personal digital assistant (PDA), a personal digital assistant, a netbook, an ultra-mobile personal computer (UMPC), a mobile Internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device, a vehicle-mounted equipment (VUE), a pedestrian terminal (PUE), a smart home (home equipment having a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a personal computer (PC), an automated teller machine, or a kiosk terminal, and the wearable device includes a smart watch, a smart band, a smart earphone, a smart glass, a smart accessory (smart bracelet, smart wrist ornament, smart ring, smart necklace, smart anklet, smart ankle ornament, etc.), a smart wristband, a smart clothing, etc. It is to be noted that the embodiments of the present application are not limited to a specific type of the terminal 11. The network side equipment 12 may include an access network equipment or a core network equipment, where the access network equipment 12 may be referred to as a radio access network equipment, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network unit.The access network equipment 12 may include a base station, a WLAN access point, or a WiFi node, etc., and the base station may be referred to as a Node B, an evolved Node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home B node, a home evolved B node, a transmitting receiving point (TRP), or any other suitable term in the field. As long as the same technical effect can be achieved, the base station is not limited to a specific technical term. In the embodiments of the present application, only a base station in an NR system is introduced as an example, but it should be explained that the specific type of the base station is not limited.The core network devices are: Core Network Node, Core Network Function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF or L-NEF), Binding Support Function (BSF), Application Function (Application Response Function (APPF)), Application Response Function (APF) and Application Response Function (APF). The present application may include, but is not limited to, at least one of the following: A-F (Automatic Frequency Division Multiplexing) Function (AF), etc. In the embodiments of the present application, only core network equipment in an NR system is introduced as an example, but it should be explained that the specific type of core network equipment is not limited.

[0023] Hereinafter, the method, device and terminal for determining time-frequency resource for Msg1 repetition transmission provided in the embodiments of the present application will be described in detail with reference to the drawings through several embodiments and use cases thereof.

[0024] First, the contents related to this application will be introduced.

[0025] In the 5G NR Rel-15 / 16 system, two types of random access procedures are defined: 4-step random access procedure (4-step RACH) and 2-step random access procedure (2-step RACH). 4-step RACH is applied to access at any position in the cell coverage range, while 2-step RACH is applied to access only in areas close to the base station or when the signal quality is good. In 4-step RACH, the UE first transmits Msg1 to the network, where Msg1 occupies a predefined time-frequency resource and the Msg1 signal includes a preamble. After transmitting Msg1, the UE monitors the PDCCH in the RAR time window and receives a random access response (RAR) scheduled on the PDCCH scrambled with the RA-RNTI using DCI format 1_0, which is a fallback DCI format. When the preamble index in the RAR is the same as the preamble index sent by the UE, the RAR is considered to have been received successfully. At this time, the UE stops monitoring the RAR and may transmit Msg3 as instructed by the UL grant included in the RAR. Msg3 is transmitted on the UL-SCH, HARQ is used, the PDCCH is scrambled with the TC-RNTI instructed by the RAR, and retransmission of Msg3 is scheduled using DCI format 0_0, which is a fallback DCI format. Msg3 contains a unique identifier for the UE. This identifier is used for collision resolution in step 4.After receiving Msg3, the network schedules Msg4 using the PDCCH scrambled by TC-RNTI. When the UE successfully decodes that the UE Contention Resolution Identity MAC control element contained in Msg4 matches the UE Contention Resolution Identity sent in Msg3, the UE considers that the random access is successful and sets its C-RNTI to TC-RNTI, that is, the four-step random access is completed.

[0026] After completing the downlink synchronization and cell search procedure, the terminal receives and detects the SSB signal in the initial downlink BWP before performing the random access procedure, and obtains the signal quality (e.g., SS-RSRP) of different SSBs. The terminal determines the path loss quality according to the SSB signal quality, and determines whether to perform 4-step RACH or 2-step RACH by referring to the threshold msgA-RSRP-Threshold. The terminal selects an SSB according to the threshold rsrp-ThresholdSSB indicated in the system message SIB1. If there is an SSB (or multiple SSBs) with SS-RSRP higher than the threshold, the terminal selects one SSB from the SSBs higher than the threshold as the correlated SSB of the random access procedure, and if the signal quality of all SSBs is lower than the threshold, the terminal may select any one SSB as the correlated SSB of the random access procedure, and the specific SSB selection manner is implemented according to the terminal.

[0027] In the NR system, a base station may configure multiple PRACH transmission occasions (also called PRACH occasions) for Frequency Division Multiplexing (FDM) at one time domain location, which is abbreviated as RO in this application for simplicity. The number of ROs that can perform FDM at one time instance may be {1, 2, 4, 8}.

[0028] The random access preamble (RACH preamble) can be transmitted only on the time domain resources configured by the parameter PRACHConfigurationIndex, and the random access preamble can be transmitted only on the frequency domain resources configured by the parameter prach-FDM. n RA ∈{0,1,...,M-1}, where M is equal to the higher layer parameter prach-FDM. At the time of initial access, the PRACH frequency domain resource n RA numbered in ascending order starting from the RO resource with the lowest frequency in the initial active uplink bandwidth part, otherwise PRACH frequency domain resource n RA The numbers are ordered in ascending order starting from the RO resource with the lowest frequency in the active uplink bandwidth part.

[0029] In NR, ROs are correlated with the SSBs (SS / PBCH blocks, synchronization signal / physical broadcast channel blocks, sometimes abbreviated as SS blocks or synchronization signal blocks) that they actually transmit. Multiple SSBs may be associated with one RO, and multiple SSBs may be associated with one RO. The correlation between SSBs and ROs is configured by the parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB.

[0030] Because the terminal transmission power is limited and the terminal transmission power is much lower than the network transmission power, in cell boundary areas and areas with limited coverage, the terminal's uplink signal coverage performance is inferior to the downlink signal coverage performance, i.e., the coverage performance of Msg1 and Msg3 is inferior to that of Msg2 and Msg4. In the high frequency band FR2, the difference in coverage performance between uplink and downlink channels becomes more significant. In order to improve the coverage performance of the uplink signal, it is possible to introduce uplink signal repeated transmission into the random access procedure, i.e., to improve the coverage performance by using the method of multiple / repeated transmission of Msg1 (PRACH).

[0031] During Msg1 repetitive transmission, multiple Msg1 signals may be associated with the same SSB / Channel State Information-Reference Signal (CSI-RS) or different SSB / CSI-RS. If the Msg1 repetitive transmission is associated with the same SSB / CSI-RS, assuming that the beam of the SSB / CSI-RS selected in the terminal is the optimal beam, the optimal beam is selected according to existing protocol definition rules. However, Msg1 repetitive transmission associated with a single SSB / CSI-RS takes longer to complete the Msg1 repetitive transmission. When the coverage is limited, there may be areas where the beams overlap between the SSB beams because the SSB beam is generally a fixed wide beam. In this case, the signal quality SS-RSRP of multiple SSBs detected by the terminal may be close, and selecting one SSB beam among them to perform random access means discarding other possible SSB beams. If PRACH resources associated with multiple SSBs can be selected to transmit Msg1, the base station may be able to improve its Msg1 detection success probability. In addition, since the measurement of SS reference signal received power (SS-RSRP) in the random access phase is determined only by the result of one measurement of the SSB, there may be measurement deviation in the SS-RSRP measurement result, so by selecting multiple SSBs and transmitting Msg1, the impact of SSB measurement deviation on SSB selection can be reduced. In general, Msg1 associated with different SSBs is transmitted in different uplink beams, and the terminal can also repeatedly transmit PRACH using a beam matching the SSB in the RO of the associated SSB.

[0032] In addition, it can be seen from the RO resource allocation method that multiple ROs can be frequency division multiplexed within one time resource. During Msg1 repeated transmission, multiple time resources determined by multiple Msg1s each include multiple frequency division multiplexed RO resources. The system needs to define a rule to select RO resources so that the base station and the terminal have the same understanding of the RO resource combination of Msg1 repeated transmission and avoid the complexity of the base station detecting Msg1 repeated transmission.

[0033] The embodiment of the present application provides a method for determining time-frequency resources for Msg1 repetitive transmission.

[0034] 2 is a flow chart 1 of a method for determining time-frequency resources for repeated transmission of Msg1 provided in an embodiment of the present application. As shown in FIG. 2, the method includes the following steps 200 and 201.

[0035] In step 200, the terminal receives a first message sent from a network side device, the first message carrying first configuration information for repeated transmission of Msg1.

[0036] Optionally, the first message includes at least one of a system message, a Downlink control information (DCI), a Media Access Control Control Element (MAC CE), and a Radio Resource Control (RRC) signaling.

[0037] For example, the terminal receives a first message transmitted by a network side device in a system message SIB1.

[0038] The first message includes first arrangement information for instructing the terminal on the arrangement of Msg1 repetitive transmission by the network side device.

[0039] In step 201, the terminal determines a first time-frequency resource for repeated transmission of Msg1 based on the first configuration information.

[0040] wherein the step of determining a first time-frequency resource for repeated transmission of Msg1 includes: determining whether to perform repeated transmission of Msg1; determining a physical random access channel (PRACH) resource for Msg1 repetition transmission; and determining a frequency hopping parameter for the Msg1 repetition transmission.

[0041] The first time-frequency resource includes multiple ROs of different time periods associated with the same downlink signal SSB / CSI-RS or multiple downlink signals SSB / CSI-RS.

[0042] It can be understood that the terminal determines whether the current cell supports Msg1 repeated transmission based on the first configuration information, and the first configuration information further indicates whether to perform Msg1 repeated transmission.

[0043] When it is determined that Msg1 repeated transmission is to be performed, a frequency hopping parameter for the Msg1 repeated transmission is further determined based on the first arrangement information.

[0044] Furthermore, a PRACH resource for the repeated Msg1 transmission is determined according to the frequency hopping parameter of the repeated Msg1 transmission, that is, an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions is determined.

[0045] It should be noted that the RO corresponding to each Msg1 transmission among the Msg1 repetition transmissions includes the time domain location and the frequency domain location of the RO resource corresponding to each Msg1 transmission among the Msg1 repetition transmissions.

[0046] As can be seen, in the high frequency band, which is FR2, the base station generally communicates using analog beams, that is, at each time, the base station can only transmit signals in one analog beam direction or receive signals in one analog beam direction. Therefore, when performing random access, multiple ROs in one time domain position should be associated with the same analog SSB beam. In FR2, if one SSB is associated with multiple ROs, another frequency diversity gain can be obtained by RO frequency hopping.

[0047] As can be understood, when the first configuration information includes indication information related to RO frequency hopping, the terminal can determine frequency hopping parameters for the Msg1 repeated transmission based on the indication information related to the frequency hopping, thereby selecting ROs at different frequency positions, which are different RO indexes in the frequency domain, during the Msg1 repeated transmission to obtain frequency diversity gain.

[0048] Frequency hopping can obtain frequency diversity gain and avoid the resources used for different Msg1 repetitions from completely overlapping in time-frequency resources, thereby improving the coverage performance of the PRACH and reducing the complexity of PRACH resource allocation.

[0049] Optionally, when the first configuration information does not include indication information related to RO frequency hopping or the first configuration information indicates that frequency hopping is not performed, the step of determining a first time-frequency resource for Msg1 repeated transmission by the terminal includes the steps of: determining to perform Msg1 repeated transmission; determining a physical random access channel (PRACH) resource for the Msg1 repeated transmission; and determining an RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions using the physical random access channel (PRACH) resource for the Msg1 repeated transmission.

[0050] Optionally, if the terminal determines not to perform Msg1 repeated transmission based on the first configuration information, it does not perform the subsequent procedures.

[0051] It can be seen that after the terminal determines the first time-frequency resource for repeated transmission of Msg1, it transmits Msg1 on the first time-frequency resource.

[0052] In an embodiment of the present application, a terminal determines a first time-frequency resource for repeated transmission of Msg1 based on first configuration information of repeated transmission of Msg1 transmitted from a network side device, thereby realizing repeated transmission of Msg1 and improving the coverage performance of PRACH.

[0053] Optionally, the first arrangement information includes at least one of the following 1) to 11).

[0054] 1) Msg1 repeat transmission pattern.

[0055] Optionally, the pattern of the Msg1 repeat transmission is: Multiple ROs are associated with the same SSB, or This includes patterns where multiple ROs are associated with different SSBs.

[0056] Here, a pattern in which multiple ROs are associated with different SSBs means a pattern in which multiple ROs are associated with multiple SSBs.

[0057] Optionally, one of the above patterns may be set as the default pattern by default according to predefined rules in the protocol, for example, by default performing Msg1 repetition transmission using a pattern where multiple ROs are associated with the same SSB.

[0058] 2) Multiple SSB combinations.

[0059] It should be noted that multiple ROs may be associated with different SSBs, and different SSBs may correspond to multiple SSB combinations, so the first configuration information further includes multiple SSB combinations used in the Msg1 repeat transmission pattern associated with multiple SSBs. In one possible indication implementation, the first configuration information indicates all SSB combinations at once in the manner of a bit map or index sequence, or determines other SSB combinations according to the first SSB combination, for example, the index of the second SSB combination is the sum of the index of the first SSB combination and a specific offset.

[0060] In a practical deployment, multiple SSBs may use the same transmission beam. The base station instructs multiple SSBs in the same beam to repeat the Msg1 transmission.

[0061] 3) Configuration parameters of the correlation between SSB and RO.

[0062] As can be seen, the SSB to RO correlation configuration parameter is used to indicate the correlation between the SSB and the RO.

[0063] Correlation between an SSB and an RO includes correlation between one SSB and multiple ROs or correlation between one RO and multiple SSBs.

[0064] For example, the SSB-RO correlation configuration parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB indicates that one SSB is associated with X consecutive ROs, where X is an integer greater than 1.

[0065] In an embodiment of the present application, optionally, when the RO frequency hopping offset is not explicitly configured in the first message, the RO frequency hopping offset can be determined according to the configuration parameters of the correlation between the SSB and the RO.

[0066] 4) A first threshold value for indicating the trigger threshold for Msg1 repeated transmission.

[0067] In one embodiment, the terminal determines whether to perform repeated transmission of Msg1 according to a trigger threshold of repeated transmission of Msg1.

[0068] The first threshold may be a trigger threshold for repeated transmission of an independently arranged Msg1, or may also serve as a threshold for determining whether or not to execute a random access procedure for repeated transmission of Msg3.

[0069] Here, the threshold value for determining whether or not to execute the random access procedure of repeated transmission of Msg3 is the trigger threshold value of the random access procedure of repeated transmission of Msg3.

[0070] 5) A second threshold for indicating the selection threshold of correlated SSBs for Msg1 repeated transmission.

[0071] In one embodiment, the terminal selects the correlated SSB of the Msg1 repeated transmission according to a selection threshold of the correlated SSB of the Msg1 repeated transmission.

[0072] The correlated SSB of a Msg1 repeated transmission is, ie, an SSB that is associated with the Msg1 repeated transmission.

[0073] The second threshold may be an independently configured threshold for selecting a correlated SSB for Msg1 repeated transmission, or may also serve as a threshold for selecting a correlated SSB during the random access procedure for Msg3 repeated transmission.

[0074] Here, the threshold for selecting a correlated SSB in the random access procedure of Msg3 repeated transmission is, in other words, the selection threshold for a correlated SSB in the random access procedure of Msg3 repeated transmission.

[0075] 6) Whether to enable RO frequency hopping.

[0076] It can be understood that when the network side device instructs to enable RO frequency hopping, it means supporting frequency hopping in the frequency domain of the RO resource for Msg1 repetitive transmission.

[0077] When the network side device instructs not to enable RO frequency hopping, it means that it does not support frequency hopping in the frequency domain of the RO resource for Msg1 repetitive transmission.

[0078] 7) RO frequency hopping offset.

[0079] Optionally, when RO frequency hopping is enabled, the network side device further indicates an RO frequency hopping offset, RO offset.

[0080] The RO frequency hopping offset is in units of RO.

[0081] 8) Number of frequency hops or frequency hopping step size.

[0082] Optionally, the network side equipment configures the step size of the RO frequency hopping.

[0083] For example, RO frequency hopping is performed every n Msg1 transmissions, where n is the step size of RO frequency hopping.

[0084] Optionally, when the RO frequency hopping step size is not explicitly configured, the step size is set to 1 by default, ie, one RO frequency hop is performed each time Msg1 is transmitted.

[0085] 9) Number of times Msg1 is repeated.

[0086] It should be noted that the number of times of repeating Msg1 transmission may be indicated by the first configuration information or may be determined by a value predefined in a protocol. Selectably, a set of repeat transmission times including a plurality of selectable values ​​is configured in the first configuration information, and the terminal selects an actual number of times of repeating Msg1 transmission according to channel quality.

[0087] 10) Msg1: Preamble resource set for repeated transmission.

[0088] 11) Msg1: RO mask for repeated transmission.

[0089] Optionally, the first configuration information may further include an RO mask of Msg1 repetition transmission.

[0090] It should be noted that when the network side device configures the RO mask, the terminal needs to select an RO frequency hopping according to an RO and an RO offset from the valid RO set indicated by the RO mask. In addition, the first configuration information may include multiple RO masks, each of which corresponds to a different number of repeated transmissions of Msg1.

[0091] The step of selectively determining whether to perform Msg1 repeated transmission and determining a physical random access channel (PRACH) resource for Msg1 repeated transmission comprises: determining to perform repeated transmission of Msg1 when a first condition is satisfied, and determining a PRACH resource for repeated transmission of Msg1; Here, the first condition is: The 4-step random access fails N times, the value of N being predefined in a protocol or configured by the first message, and the 4-step random access is a 4-step random access procedure of one transmission of Msg1 and one transmission of Msg3, and / or a 4-step random access procedure of one transmission of Msg1 and repeated transmission of Msg3; Receive a first signaling used to instruct a terminal to perform Msg1 repeated transmission, the first signaling including instruction information related to RO frequency hopping, the first signaling being DCI, MAC CE, or RRC signaling; The signal quality of the downlink signal is equal to or lower than the first threshold; Here, the first threshold value is set by the first message, or is used as a threshold value for determining whether or not to execute a random access procedure of Msg3 repeated transmission.

[0092] The terminal's decision to perform Msg1 repetition transmission includes the following cases:

[0093] Case 1: If the 4-step random access fails N times, Msg1 is repeatedly transmitted.

[0094] Optionally, the failure of the four-step random access N times In one 4-step random access procedure, the terminal attempts to transmit Msg1 once for N times but does not receive the corresponding Msg2; or In one four-step random access procedure, the terminal transmits Msg1 once and receives the corresponding Msg2 N times, but fails to transmit Msg3; Here, the value of N is predefined in the protocol or configured by the first message.

[0095] N may be understood as a threshold value, and in a four-step random access procedure, if a terminal attempts to transmit Msg1 once N times but does not receive the corresponding Msg2, the terminal will perform repeated transmission of Msg1 when attempting random access for the N+1th time; or, if a terminal transmits Msg1 once N times and receives the corresponding Msg2 but fails to transmit Msg3, the terminal will perform repeated transmission of Msg1 when attempting random access for the N+1th time.

[0096] Case 2: When the terminal receives a first signaling, it performs Msg1 repeated transmission, where the first signaling is used to instruct the terminal to perform Msg1 repeated transmission, and carries instruction information related to RO frequency hopping.

[0097] As will be appreciated, the network side device may explicitly instruct the terminal to perform repeated transmission of Msg1.

[0098] Here, the indication information related to RO frequency hopping includes at least one of: whether to enable RO frequency hopping, an RO frequency hopping offset, a frequency hopping number, or a frequency hopping step size.

[0099] Optionally, the first signaling includes DCI or MAC CE or RRC signaling.

[0100] Case 3: When the signal quality of the downlink signal is equal to or lower than the first threshold, the terminal performs repeated transmission of Msg1.

[0101] Here, the first threshold value is set by the first message, or is used as a threshold value for determining whether or not to execute a random access procedure of Msg3 repeated transmission.

[0102] Optionally, the downlink signal may be SSB or CSI-RS.

[0103] Furthermore, the downlink signal may be one or more downlink reference signals SSB or CSI-RS selected by the terminal, for example, the SSB with the largest RSRP.

[0104] The signal quality of the downlink signal may be RSRP, which indicates pathloss, or reference signal received quality (RSRQ), or signal-to-noise and interference ratio (SINR).

[0105] When the signal quality of the downlink signal is lower than a first threshold T0, the terminal performs repeated transmission of Msg1; otherwise, the terminal performs one-time transmission of Msg1.

[0106] For example, in one implementation, if the signal qualities (RSRP or RSRQ or SINR) of all SSB / CSI-RS are lower than a first threshold T0, i.e., the maximum value of the signal qualities of all SSB / CSI-RS is selected and compared with the first threshold T0, and if the maximum value is less than or equal to the first threshold T0, repeated transmission of Msg1 is performed; otherwise, a single transmission of Msg1 is performed.

[0107] In order to perform repeated transmission of Msg1, it is first necessary to determine / select a PRACH resource for repeated transmission of Msg1. Hereinafter, how to determine a PRACH resource for repeated transmission of Msg1 will be introduced.

[0108] Optionally, the step of determining PRACH resources for Msg1 repeated transmission includes steps 300, 301 and 302.

[0109] In step 300, an SSB or a combination of SSBs associated with the Msg1 repeated transmission is determined according to a pattern of the Msg1 repeated transmission and a second threshold value.

[0110] Here, the second threshold value is set by the first message, or is also used as a threshold value for selecting correlated SSBs during a random access procedure of Msg3 repeated transmission.

[0111] It should be noted that the SSB in the embodiment of the present application may be replaced by other downlink reference signals such as CSI-RS. The SSB combination in the embodiment of the present application may be replaced by other downlink reference signal combinations such as CSI-RS combination. The embodiment of the present application takes the SSB as an example, but is not limited to the SSB.

[0112] In a pattern of Msg1 repeated transmission in which a plurality of ROs are associated with the same SSB, the step of determining an SSB associated with the Msg1 repeated transmission based on the pattern of the Msg1 repeated transmission and the second threshold value includes: a terminal comparing signal qualities of all detected SSBs with the second threshold and selecting an SSB having a signal quality higher than the second threshold as an SSB related to the Msg1 repeated transmission; Or, when there are a plurality of SSBs whose signal quality is higher than the second threshold, selecting one SSB from the plurality of SSBs as an SSB related to the Msg1 repeated transmission by the terminal or randomly; Alternatively, if there is no SSB whose signal quality is higher than the second threshold, the method includes a step of selecting, by the terminal or randomly, one SSB as an SSB associated with the Msg1 repeated transmission.

[0113] Optionally, in a pattern of Msg1 repetitive transmission in which a plurality of ROs are associated with different SSBs, the step of determining an SSB combination associated with the Msg1 repetitive transmission according to the pattern of the Msg1 repetitive transmission and the second threshold value includes: The method includes the step of comparing the signal quality of the SSB combinations with the second threshold value, and selecting one of the SSB combinations as the SSB combination associated with the Msg1 repeated transmission.

[0114] Here, the signal quality of the SSB combination may be the result of the best signal quality among the SSB combinations, or the result of the worst signal quality among them, or the weighted result of each SSB signal quality, which may be specified by the protocol or configured by the network.

[0115] Optionally, the terminal selects one SSB combination, the signal quality of which is higher than a second threshold, from among the plurality of SSB combinations as the SSB combination associated with the Msg1 repeated transmission.

[0116] Alternatively, when there are multiple SSB combinations whose signal quality is higher than the second threshold, one SSB combination from the multiple SSB combinations is selected by the terminal or randomly as the SSB combination associated with the Msg1 repeated transmission.

[0117] Alternatively, if there is no SSB combination whose signal quality is higher than the second threshold among the plurality of SSB combinations, one SSB combination is selected by the terminal or one SSB combination is selected randomly from the plurality of SSB combinations as an SSB combination associated with the Msg1 repeated transmission.

[0118] Furthermore, the terminal determines the number of times to repeat transmission of Msg1 according to the signal quality of SSB or SSB combination.

[0119] In step 301, a set of candidate ROs of PRACH resources for the Msg1 repeated transmission is determined according to a correlation between an SSB or a combination of SSBs and an RO associated with the Msg1 repeated transmission.

[0120] As can be understood, after the terminal determines an SSB or SSB combination associated with Msg1 repeated transmission, it can determine an RO set corresponding to the SSB or SSB combination associated with Msg1 repeated transmission based on the correlation between the SSB and the RO, and the RO set corresponding to the SSB or SSB combination associated with Msg1 repeated transmission can be a candidate RO set of PRACH resources for the Msg1 repeated transmission, or multiple ROs in the RO set can be selected to be multiple ROs for the Msg1 repeated transmission.

[0121] In step 302, the RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions is determined.

[0122] In an embodiment of the present application, the terminal determines an SSB or SSB combination associated with the Msg1 repeated transmission according to a pattern of the Msg1 repeated transmission and a second threshold value, and then determines a PRACH resource for the Msg1 repeated transmission based on a correlation between the SSB or SSB combination and the RO, and then determines an RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions based on the PRACH resource, thereby realizing the Msg1 repeated transmission and improving the coverage performance of the PRACH.

[0123] Optionally, the step of determining an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions includes step 400 and step 401 .

[0124] In step 400, a time domain location of the RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions is determined.

[0125] As can be understood, the terminal first determines the time domain locations of the multiple ROs for the Msg1 repeated transmission, and then selects one RO from the multiple ROs in the same time domain resource according to a frequency hopping parameter such as an RO frequency hopping offset (RO offset) as the first time-frequency resource for the Msg1 repeated transmission.

[0126] Optionally, the step of determining a time domain location of an RO corresponding to each Msg1 transmission of the Msg1 repeated transmissions comprises: In a pattern of Msg1 repeated transmission in which multiple ROs are associated with the same SSB, the time domain positions of the multiple ROs in the Msg1 repeated transmission correspond to correlation periods between multiple consecutive SSBs and the RO.

[0127] Here, the correlation period corresponding to the first Msg1 of the repeated Msg1 transmission is determined by the reference time point, that is, the RO associated with the SSB in the first correlation period from the reference time point is the RO corresponding to the first Msg1 transmission.

[0128] The reference instant may be predefined in the protocol or determined by the first message placement, for example the reference instant may be the start time of frame=0 or the start time of an association pattern period.

[0129] Fig. 3 is an exemplary diagram of determining the time domain position of ROs of Msg1 repeated transmission associated with the same SSB provided in an embodiment of the present application. As shown in Fig. 3, assuming that multiple ROs are associated with SSB1, a correlation period between the first SSB and RO is determined according to a reference time point, and in the correlation period between the first SSB and RO, the RO associated with SSB1 is the RO corresponding to the first Msg1 in the Msg1 repeated transmission. In the correlation period between the next SSB and RO, the RO associated with SSB1 is the RO corresponding to the second Msg1 in the Msg1 repeated transmission, and so on. That is, the time domain positions of multiple ROs of Msg1 repeated transmission correspond to the correlation periods between multiple consecutive SSBs and ROs.

[0130] Optionally, the step of determining a time domain location of an RO corresponding to each Msg1 transmission of the Msg1 repeated transmissions comprises: In a pattern of Msg1 repetitive transmission in which multiple ROs are associated with different SSBs, the time domain location of the RO associated with each SSB is within a correlation period between one SSB and the RO.

[0131] 4 is an exemplary diagram of determining the time domain location of ROs of Msg1 repeated transmissions associated with different SSBs provided in an embodiment of the present application. As shown in FIG. 4, a terminal selects a combination of SSB1 and SSBi to perform Msg1 repeated transmission. The RO corresponding to the first Msg1 in the Msg1 repeated transmission is the RO associated with SSB1, and the RO corresponding to the second Msg1 in the Msg1 repeated transmission is the RO associated with SSBi. Here, the RO associated with SSB1 and the RO associated with SSBi are within the same SSB-RO correlation period.

[0132] In step 401, a frequency domain location of an RO corresponding to each Msg1 transmission among the repeated transmissions of Msg1 is determined according to the frequency hopping parameters.

[0133] Based on the time domain position of the RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions, firstly, the frequency domain position of the RO for the first Msg1 transmission among the Msg1 repeated transmissions is determined, then the frequency domain position of the RO for the second Msg1 transmission is determined according to the frequency hopping parameters and the frequency domain position of the RO for the first Msg1 transmission, and the frequency domain position of the RO for the i-1th Msg1 transmission is determined according to the frequency hopping parameters and the frequency domain position of the RO for the i-1th Msg1 transmission, and by this analogy, the frequency domain position of the RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions is determined.

[0134] Optionally, the step of determining a frequency domain location of an RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions according to the frequency hopping parameters includes: A frequency domain location of an RO of a first Msg1 transmission among the Msg1 repeated transmissions is determined by a rule predefined in a protocol, or by one RO randomly selected from a set of ROs at a time domain location of the first Msg1 transmission; determining a frequency domain location of an RO for an i-th Msg1 transmission among the Msg1 repeated transmissions according to an RO frequency domain location of the i-1-th Msg1 transmission among the Msg1 repeated transmissions and an RO frequency hopping offset; Here, i is a positive integer equal to or greater than 2.

[0135] In one embodiment, a rule predefined in the protocol may be to determine the frequency domain location of the RO of the first Msg1 transmission according to the UE ID.

[0136] The RO frequency hopping ensures that the RO frequency hopping is performed among X available ROs associated with one SSB, as follows: indexRO(i-th transmission)=mod(indexRO(i-1-th transmission)+ROoffset,X), where indexRO indicates the index of multiple ROs multiplexing the frequency domain, and ROoffset is the offset of the RO frequency hopping, which is configured by the first configuration information or predefined in the protocol.

[0137] 5 is a schematic diagram 1 of RO frequency hopping provided in an embodiment of the present application. As shown in FIG. 5, RO offset=2.

[0138] Optionally, the step of determining a frequency hopping parameter for Msg1 repeated transmission comprises: Determining the RO frequency hopping offset according to a configuration parameter of the correlation between SSB and RO or a rule predefined in a protocol.

[0139] In one embodiment, according to the configuration parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB of the correlation between SSB and RO configured in the system message, one SSB is associated with X consecutive ROs, where X is an integer greater than 1, and the RO offset is a*X, where a is a real number greater than 0 and less than 1, e.g., a=1 / 2. If a*X is not an integer, the result is further rounded up or down by rounding. The value of a is predefined in the protocol.

[0140] In one embodiment, the rule predefined in the protocol is to determine the RO frequency hopping offset according to the RO frequency domain multiplexing number.

[0141] In particular, when RO offset=0, it means that the frequency resources of the RO occupied by multiple Msg1s during repeated Msg1 transmission are the same, or that the logical positions among multiple consecutive ROs associated with the SSB are the same.

[0142] When the network side device configures the RO mask, the terminal needs to select an RO from the valid RO set indicated by the RO mask and an RO frequency hopping based on the RO offset.

[0143] In some embodiments, the RO for the second repetition and the second and subsequent repetitions are independently configured ROs.

[0144] It should be noted that the "second repetition" described in the embodiment of the present application refers to the second transmission of the same Msg1 before the end or start of the RAR window. (Optional definition) The Nth repetition is understood to be the Nth chronological transmission of Msg1 during one Msg1 repetition transmission.

[0145] In some alternative embodiments, the method further comprises: The method further includes a step of the terminal determining that the network side device supports Msg1 repeated transmission when the first configuration information further includes an RO for a second and subsequent Msg1 transmissions among the Msg1 repeated transmissions. As can be understood, when a parameter for Msg1 repeated transmission is configured in the first configuration information, it means that the current cell supports / allows Msg1 repeated transmission.

[0146] As can be seen, after detecting an SSB and obtaining a system message, the terminal judges whether it is necessary to perform Msg1 repeated transmission, and if the first configuration information further includes ROs for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions, the terminal determines that it is necessary to perform Msg1 repeated transmission.

[0147] Optionally, the pattern of the Msg1 repeat transmission is: A pattern in which the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with the same SSB; and a pattern in which the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with one or more different SSBs.

[0148] Furthermore, the first message indicates whether the pattern of repeated transmission of Msg1 is a pattern in which the separately placed RO and the RO for transmitting the first Msg1 are associated with the same SSB, or a pattern in which the separately placed RO and the RO for transmitting the first Msg1 may be associated with one or more different SSBs.

[0149] Here, the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with one or more different SSBs, meaning that the SSB associated with the RO for the second and subsequent Msg1 transmissions and the SSB associated with the RO for the first Msg1 transmission are different, and there may be multiple different SSBs.

[0150] It should be noted that the separately arranged ROs are ROs for the second and subsequent Msg1 transmissions among the repeated transmissions of Msg1.

[0151] Furthermore, optionally, one of the above patterns may be set as the default pattern by default according to a rule predefined in the protocol, and repeated Msg1 transmission may be performed using a pattern in which, for example, a separately placed RO and an RO for transmitting the first Msg1 are associated with the same or multiple SSBs.

[0152] Optionally, when the RO for the second and subsequent Msg1 transmissions among the Msg1 repeat transmissions and the RO of the first Msg1 transmission among the Msg1 repeat transmissions are associated with one or more different SSBs, the first message further comprises a plurality of SSB combinations, the plurality of SSB combinations being associated with an Msg1 repeat transmission pattern in which the RO for the second and subsequent Msg1 transmissions among the current Msg1 repeat transmissions and the RO of the first Msg1 transmission among the Msg1 repeat transmissions are associated with one or more different SSBs.

[0153] Furthermore, when the terminal determines whether to select a PRACH resource that supports Msg1 repetition transmission, the determination may be based on one or more of the following: 1) A downlink metric (eg, RSRP, RSRQ, RSRI) is less than or equal to a first threshold T0. The first threshold may be an independently configured value, or may be an existing configured value or a function of an existing configured value, for example, it may also serve as the RSRP threshold for determining whether to perform a random access procedure of Msg3 repeated transmission. 2) Whether the number of times the PRACH preamble is repeatedly transmitted exceeds a third threshold. The third threshold may be an independently configured value, or may be an existing configured value or a function of an existing configured value, for example, half the maximum number of retransmissions for determining whether to request a random access error notification.

[0154] Furthermore, the terminal selects an SSB for the first Msg1 transmission according to a second threshold T1 of SSBs for RO resource selection for the first Msg1 transmission among the repeated Msg1 transmissions.

[0155] The second threshold may be configured independently, or may also serve as the threshold for selecting a correlated SSB during the random access procedure of repeated transmission of Msg3, or may also serve as the RSRP threshold for selecting an SSB when repeated transmission of Msg1 is not performed (i.e., single transmission of Msg1).

[0156] Furthermore, the terminal determines an RO and a preamble sequence for the first Msg1 transmission according to the selected SSB, and can determine the locations and numbers of PRACH resources for the second and subsequent Msg1 transmissions among the repeated Msg1 transmissions according to the RO and preamble sequence of the first Msg1 transmission and the frequency hopping parameters.

[0157] Optionally, the method further comprises: The method further includes determining that the Msg1 repeated transmission supports frequency hopping when multiple ROs are deployed in the frequency domain.

[0158] The phrase "multiple ROs are arranged in the frequency domain" used herein may refer to the arrangement of ROs in the frequency domain for the initial Msg1 transmission.

[0159] In this case, if the RO configuration of the first Msg1 transmission supports multiplexing of multiple ROs in the frequency domain, it is considered that the Msg1 repeat transmission supports frequency hopping. Figure 6 is a schematic diagram 2 of RO frequency hopping provided in an embodiment of the present application, in which the number of repeat transmissions is 4 and the frequency hopping offset is 2. As shown in Figure 6, when two ROs used for the first Msg1 transmission are configured in the frequency domain, it is determined that the Msg1 repeat transmission supports frequency hopping.

[0160] Optionally, if frequency hopping is supported, the network side device indicates a frequency hopping offset, for example in units of RO.

[0161] Further, the network side device can selectably configure the step size of the RO frequency hopping, i.e., perform RO frequency hopping every few Msg1 transmissions; for example, the step size can be selectably set to 1 by default, i.e., perform one RO frequency hopping every time Msg1 is transmitted.

[0162] Optionally, the method further comprises: The method further includes determining the number of times of repeating Msg1 transmission based on the number of ROs for the second and subsequent Msg1 transmissions among the repeated transmissions of Msg1 in the first configuration information.

[0163] Optionally, the method further comprises: The method further includes a step of determining SSBs associated with the second and subsequent Msg1 transmissions of the Msg1 repeated transmissions according to an SSB pattern configured by a network side device or determined in advance.

[0164] In a pattern of Msg1 repetition transmission associated with multiple SSBs, the SSB associated with the second and subsequent repetition transmissions can be determined by at least one of the following methods 1) to 2).

[0165] 1) SSB pattern configured by network equipment.

[0166] For example, multiple SSBs of adjacent beams or the same beam may each be mapped to an RO for repeated transmission of Msg1.

[0167] 2) Pre-determined SSB patterns.

[0168] For example, if the first repetition is associated with SSB0, the UE and the network will associate the nth repetition with SSBx by default. x = (n-1) mod N. Here, x is the index of the associated SSB and N is the number of SSBs to actually transmit.

[0169] In an embodiment of the present application, the terminal determines a first time-frequency resource for Msg1 repetition transmission according to the first configuration information of Msg1 repetition transmission transmitted from the network side device, and obtains frequency diversity gain by selecting ROs at different frequency positions, and can avoid resources used for different Msg1 repetitions from completely overlapping in time-frequency resources, thereby improving the coverage performance of Msg1 repetition transmission and reducing the complexity of PRACH resource allocation.

[0170] Optionally, the step of receiving a first message sent by the network side device, the first message carrying first configuration information of Msg1 repeated transmission, includes: The method includes a step of receiving, by the terminal, a first message carrying first configuration information for instructing the terminal to perform repeated transmission of Msg1 in a contention-free random access procedure.

[0171] In this embodiment, the first message carries first configuration information for instructing repeated transmission of Msg1 in the contention-free random access procedure.

[0172] Optionally, the first configuration information includes at least one of the following a) to f):

[0173] a) Random access type.

[0174] Selectable,random access type, A four-step random access procedure with one transmission of Msg1 and one transmission of Msg3; A four-step random access procedure with one transmission of Msg1 and repeated transmission of Msg3; A four-step random access procedure with repeated transmission of Msg1 and one transmission of Msg3; It includes at least one of the four-step random access procedures of Msg1 repeated transmission and Msg3 repeated transmission.

[0175] Specifically, the A-bits field is defined and indicated, and A may be 2. Alternatively, the RACH type is determined according to the correspondence relationship of the preamble index in the range of preamble indexes of different RACH types indicated by the DCI.

[0176] Depending on the random access type, it can be determined whether or not to perform repeated transmission of Msg1.

[0177] b) Msg1 repeat transmission pattern.

[0178] Selectable Msg1 repeat transmission pattern: It includes Msg1 repeat transmission patterns associated with the same SSB or Msg1 repeat transmission patterns associated with multiple SSBs.

[0179] c) The number of times Msg1 is repeated.

[0180] d) Whether to enable RO frequency hopping.

[0181] Whether to enable RO frequency hopping refers to indicating whether the Msg1 repeated transmission supports frequency hopping, or by default, determining whether to enable RO frequency hopping through the configuration of the system message.

[0182] e) RO frequency hopping offset.

[0183] Optionally, the first configuration information indicates an RO frequency hopping offset (RO offset) of the Msg1 repeated transmission.

[0184] Or, the RO offset is determined according to a rule predefined in the protocol or the placement of a system message.

[0185] f) RO set.

[0186] Optionally, the field indicates an RO configuration set, for example, an RO set in a NUL carrier, or a 2-step RO set, or an RO set for a 4-step RACH with Msg3 repetition, or an RO set for a specifically configured Msg1 repetition transmission.

[0187] Optionally, the first configuration message may further include an RO for the second and subsequent Msg1 transmissions of the Msg1 repetition.

[0188] The terminal determines a first time-frequency resource for repeated transmission of Msg1 based on the first configuration information.

[0189] Optionally, the step of determining, by the terminal, a first time-frequency resource for repeated transmission of Msg1 based on the first configuration information includes: determining whether to perform repeated transmission of Msg1; determining a physical random access channel (PRACH) resource for Msg1 repetition transmission; determining a frequency hopping parameter for Msg1 repetition transmission; determining an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions.

[0190] In this embodiment, for the step of the terminal determining the first time-frequency resource for repeated transmission of Msg1 based on the first configuration information, reference may be made to the relevant flow of the step of determining the first time-frequency resource for repeated transmission of Msg1 based on the first configuration information in the above embodiment, and detailed description thereof will be omitted here.

[0191] In a case where the first configuration message may further include an RO for a second and subsequent Msg1 transmissions of the Msg1 repeated transmissions, the method further comprises: determining the number of times of repeating Msg1 transmission according to a number of ROs and / or a frequency hopping pattern for a second and subsequent Msg1 transmissions among the repeated transmissions of Msg1 in the first configuration information; and determining that the Msg1 repeated transmission supports frequency hopping when multiple ROs are deployed in the frequency domain.

[0192] In Msg1 repeat transmission scheduled by DCI, fields in DCI 1-0 are used to indicate configuration information of Msg1 repeat transmission, including the random access type, the Msg1 repeat transmission pattern, the number of Msg1 repeat transmissions, whether to enable RO frequency hopping, and related parameters of RO frequency hopping.

[0193] In an embodiment of the present application, a terminal receives first configuration information sent from a network side device, for instructing a terminal to perform repeated transmission of Msg1 in a contention-free random access procedure, and determines a first time-frequency resource for repeated transmission of Msg1 in the contention-free random access procedure based on the first configuration information, thereby realizing repeated transmission of Msg1 in the contention-free random access procedure and improving the coverage performance of PRACH.

[0194] FIG. 7 is a flow chart 2 of a method for determining time-frequency resources for Msg1 repeated transmission provided in an embodiment of the present application. As shown in FIG. 7, the method is applied to a network side device, The method includes step 700 of a network side device sending a first message carrying first configuration information of Msg1 repeated transmission to a terminal.

[0195] As can be seen, the network side device sends a first message to the terminal to indicate the first configuration information of the Msg1 repeated transmission to the terminal.

[0196] Optionally, the first message includes at least one of a system message, a DCI, a MAC CE, and an RRC signaling.

[0197] Optionally, the first configuration information includes at least one of the following 1) and 11):

[0198] 1) Msg1 repeat transmission pattern.

[0199] Optionally, the pattern of the Msg1 repeat transmission is: Multiple ROs are associated with the same SSB, or This includes patterns where multiple ROs are associated with different SSBs.

[0200] Here, a pattern in which multiple ROs are associated with different SSBs means a pattern in which multiple ROs are associated with multiple SSBs.

[0201] Optionally, one of the above patterns may be set as the default pattern by default according to predefined rules in the protocol, for example, by default performing Msg1 repetition transmission using a pattern where multiple ROs are associated with the same SSB.

[0202] 2) Multiple SSB combinations.

[0203] It should be noted that multiple ROs may be associated with different SSBs, and different SSBs may correspond to multiple SSB combinations, so the first configuration information further includes multiple SSB combinations used in the Msg1 repeat transmission pattern associated with multiple SSBs. In one possible indication implementation, the first configuration information indicates all SSB combinations at once in the manner of a bit map or index sequence, or determines other SSB combinations according to the first SSB combination, for example, the index of the second SSB combination is the sum of the index of the first SSB combination and a specific offset.

[0204] In a practical deployment, multiple SSBs may use the same transmission beam. The base station instructs multiple SSBs in the same beam to repeat the Msg1 transmission.

[0205] 3) Configuration parameters of the correlation between SSB and RO.

[0206] As can be seen, the SSB to RO correlation configuration parameter is used to indicate the correlation between the SSB and the RO.

[0207] Correlation between an SSB and an RO includes correlation between one SSB and multiple ROs or correlation between one RO and multiple SSBs.

[0208] For example, the SSB-RO correlation configuration parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB indicates that one SSB is associated with X consecutive ROs, where X is an integer greater than 1.

[0209] In an embodiment of the present application, optionally, when the RO frequency hopping offset is not explicitly configured in the first message, the RO frequency hopping offset can be determined according to the configuration parameters of the correlation between the SSB and the RO.

[0210] 4) A first threshold value for indicating the trigger threshold for Msg1 repeated transmission.

[0211] In one embodiment, the terminal determines whether to perform repeated transmission of Msg1 according to a trigger threshold of repeated transmission of Msg1.

[0212] The first threshold may be a trigger threshold for repeated transmission of an independently arranged Msg1, or may also serve as a threshold for determining whether or not to execute a random access procedure for repeated transmission of Msg3.

[0213] Here, the threshold value for determining whether or not to execute the random access procedure of repeated transmission of Msg3 is the trigger threshold value of the random access procedure of repeated transmission of Msg3.

[0214] 5) A second threshold for indicating the selection threshold of correlated SSBs for Msg1 repeated transmission.

[0215] In one embodiment, the terminal selects the correlated SSB of the Msg1 repeated transmission according to a selection threshold of the correlated SSB of the Msg1 repeated transmission.

[0216] The correlated SSB of a Msg1 repeated transmission is, ie, an SSB that is associated with the Msg1 repeated transmission.

[0217] The second threshold may be an independently configured threshold for selecting a correlated SSB for Msg1 repeated transmission, or may also serve as a threshold for selecting a correlated SSB during the random access procedure for Msg3 repeated transmission.

[0218] Here, the threshold for selecting a correlated SSB in the random access procedure of Msg3 repeated transmission is, in other words, the selection threshold for a correlated SSB in the random access procedure of Msg3 repeated transmission.

[0219] 6) Whether to enable RO frequency hopping.

[0220] It can be understood that when the network side device instructs to enable RO frequency hopping, it means supporting frequency hopping in the frequency domain of the RO resource for Msg1 repetitive transmission.

[0221] When the network side device instructs not to enable RO frequency hopping, it means that it does not support frequency hopping in the frequency domain of the RO resource for Msg1 repetitive transmission.

[0222] 7) RO frequency hopping offset.

[0223] Optionally, when RO frequency hopping is enabled, the network side device further indicates an RO frequency hopping offset, RO offset.

[0224] The RO frequency hopping offset is in units of RO.

[0225] 8) Number of frequency hops or frequency hopping step size.

[0226] Optionally, the network side equipment configures the step size of the RO frequency hopping.

[0227] For example, the RO frequency hopping is performed every n Msg1 transmissions, where n is the compensation of the RO frequency hopping.

[0228] Optionally, when the RO frequency hopping step size is not explicitly configured, the step size is set to 1 by default, ie, one RO frequency hop is performed each time Msg1 is transmitted.

[0229] 9) Number of times Msg1 is repeated.

[0230] It should be noted that the number of times of repeating Msg1 transmission may be indicated by the first configuration information or may be determined by a value predefined in a protocol. Selectably, a set of repeat transmission times including a plurality of selectable values ​​is configured in the first configuration information, and the terminal selects an actual number of times of repeating Msg1 transmission according to channel quality.

[0231] 10) Msg1 repeats transmission of the preamble resource set.

[0232] 11) RO mask for Msg1 repeated transmission.

[0233] Optionally, the first configuration information may further include an RO mask of Msg1 repetition transmission.

[0234] It should be noted that when the network side device configures the RO mask, the terminal needs to select an RO frequency hopping according to an RO and an RO offset from the valid RO set indicated by the RO mask. In addition, the first configuration information may include multiple RO masks, each of which corresponds to a different number of repeated transmissions of Msg1.

[0235] Optionally, the method further comprises: The method further includes sending a first signaling to the terminal, the first signaling being used to instruct the terminal to perform Msg1 repeated transmission and carrying instruction information related to RO frequency hopping.

[0236] As can be seen, the network side device may explicitly instruct the terminal to perform repeated transmission of Msg1.

[0237] Here, the indication information related to RO frequency hopping includes at least one of: whether to enable RO frequency hopping, an RO frequency hopping offset, a frequency hopping number, or a frequency hopping step size.

[0238] Optionally, the first signaling includes DCI or MAC CE or RRC signaling.

[0239] Optionally, the first configuration information further includes an RO for a second and subsequent Msg1 transmissions among the repeated transmissions of Msg1.

[0240] As will be understood, the network side device can independently configure the ROs for the second Msg1 transmission and the second and subsequent Msg1 transmissions by transmitting the first configuration information containing the ROs for the second and subsequent Msg1 transmissions among the repeated Msg1 transmissions.

[0241] After detecting the SSB and obtaining the system message, the terminal judges whether it is necessary to perform Msg1 repeated transmission, and if the first configuration information further includes ROs for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions, the terminal determines that it is necessary to perform Msg1 repeated transmission.

[0242] Optionally, the method further comprises: The method further includes transmitting to the terminal an SSB pattern for the terminal to determine an SSB associated with the second and subsequent Msg1 transmissions of the Msg1 repeated transmissions.

[0243] As will be appreciated, the network side equipment transmits the SSB pattern to the terminal so that the terminal determines the SSB associated with the second and subsequent Msg1 transmissions of said Msg1 repeated transmissions.

[0244] The SSB pattern is used to associate the Msg1 transmission with the SSB.

[0245] For example, multiple SSBs of adjacent beams or the same beam may each be mapped to a different RO for Msg1 repetition transmission.

[0246] Further, for example, if the first repetition is associated with SSB0, the UE and the network will associate the nth repetition with SSBx by default. x = (n-1) mod N. Here, x is the index of the associated SSB and N is the number of SSBs to actually transmit.

[0247] In an embodiment of the present application, the network side device sends first configuration information for Msg1 repeated transmission to the terminal, so that the terminal determines a first time-frequency resource for Msg1 repeated transmission, thereby realizing Msg1 repeated transmission and improving the coverage performance of the PRACH.

[0248] Optionally, the step of the network side device sending a first message carrying first configuration information of Msg1 repeated transmission to the terminal includes: The method includes a step of a network side device transmitting, to a terminal, a first message carrying first configuration information for instructing the terminal to perform repeated transmission of Msg1 in a contention-free random access procedure.

[0249] As can be seen, the network side equipment sends a first message to the terminal to transmit first configuration information to the terminal, instructing the terminal to perform Msg1 repeated transmission in the contention-free random access procedure, so that the terminal determines a first time-frequency resource for Msg1 repeated transmission based on the first configuration information.

[0250] Optionally, the first configuration information includes at least one of the following a) to f):

[0251] a) Random access type.

[0252] Optionally, the random access type is: A four-step random access procedure with one transmission of Msg1 and one transmission of Msg3; A four-step random access procedure with one transmission of Msg1 and repeated transmission of Msg3; A four-step random access procedure with repeated transmission of Msg1 and one transmission of Msg3; It includes at least one of the four-step random access procedures of Msg1 repeated transmission and Msg3 repeated transmission.

[0253] Specifically, the A-bits field is defined and indicated, and A may be 2. Alternatively, the RACH type is determined according to the correspondence relationship of the preamble index in the range of preamble indexes of different RACH types indicated by the DCI.

[0254] Depending on the random access type, it can be determined whether or not to perform repeated transmission of Msg1.

[0255] b) Msg1 repeat transmission pattern.

[0256] Selectable Msg1 repeat transmission pattern: It includes Msg1 repeat transmission patterns associated with the same SSB or Msg1 repeat transmission patterns associated with multiple SSBs.

[0257] c) The number of times Msg1 is repeated.

[0258] d) Whether to enable RO frequency hopping.

[0259] Whether to enable RO frequency hopping indicates whether the Msg1 repeated transmission supports frequency hopping, or determines whether to enable RO frequency hopping by default according to the configuration of the system message.

[0260] e) RO frequency hopping offset.

[0261] Optionally, the first configuration information indicates an RO frequency hopping offset (RO offset) of the Msg1 repeated transmission.

[0262] Or, the RO offset is determined according to a rule predefined in the protocol or the placement of a system message.

[0263] f) RO set.

[0264] Optionally, the field indicates an RO configuration set, for example, an RO set in a NUL carrier, or a 2-step RO set, or an RO set for a 4-step RACH with Msg3 repetition, or an RO set for a specifically configured Msg1 repetition transmission.

[0265] Optionally, the first configuration message may further include an RO for the second and subsequent Msg1 transmissions of the Msg1 repetition.

[0266] The network side device can independently configure the ROs for the second repetition and the subsequent repetitions of Msg1 transmission by transmitting the first configuration information containing the ROs for the second and subsequent repetitions of Msg1 transmission.

[0267] In an embodiment of the present application, the network side equipment sends first configuration information to the terminal to instruct the terminal to perform repeated transmission of Msg1 in the contention-free random access procedure, so that the terminal determines a first time-frequency resource for repeated transmission of Msg1 in the contention-free random access procedure, thereby realizing repeated transmission of Msg1 in the contention-free random access procedure and improving the coverage performance of PRACH.

[0268] The method for determining time-frequency resource for repeated transmission of Msg1 provided in the embodiment of the present application may be performed by a device for determining time-frequency resource for repeated transmission of Msg1. The device for determining time-frequency resource for repeated transmission of Msg1 provided in the embodiment of the present application is taken as an example to execute the method for determining time-frequency resource for repeated transmission of Msg1 in the embodiment of the present application to describe the device for determining time-frequency resource for repeated transmission of Msg1 provided in the embodiment of the present application.

[0269] FIG. 8 is a schematic diagram 1 of the configuration of a device 800 for determining time-frequency resources for repeated transmission of Msg1 provided in an embodiment of the present application. As shown in FIG. 8, the device 800 for determining time-frequency resources for repeated transmission of Msg1 includes: A first receiving unit 810 is used to receive a first message including first configuration information of Msg1 repeated transmission, the first message being sent from a network side device; a first determination unit 820 used to determine a first time-frequency resource for repeated transmission of Msg1 according to the first configuration information; The step of determining a first time-frequency resource for repeated transmission of Msg1 includes: determining whether to perform repeated transmission of Msg1; determining a physical random access channel (PRACH) resource for Msg1 repetition transmission; and determining a frequency hopping parameter for the Msg1 repetition transmission.

[0270] Optionally, the first configuration information is: Msg1 Repeat transmission pattern, Multiple SSB combinations, Configuration parameters for SSB and RO correlation, Msg1: a first threshold for indicating the trigger threshold for repeated transmission; a second threshold for indicating the selection threshold of the correlation SSB for the Msg1 repetition transmission; Whether to enable RO frequency hopping; RO frequency hopping offset, Number of frequency hops or frequency hopping step size, Msg1: Number of repeated transmissions Msg1: Preamble resource set for repeated transmission; Msg1 includes at least one of the RO masks of repeated transmission.

[0271] Optionally, the pattern of the Msg1 repeat transmission is: Multiple ROs are associated with the same SSB, or This includes patterns where multiple ROs are associated with different SSBs.

[0272] The step of selectively determining whether to perform Msg1 repeated transmission and determining a physical random access channel (PRACH) resource for Msg1 repeated transmission comprises: determining to perform repeated transmission of Msg1 when a first condition is satisfied, and determining a PRACH resource for repeated transmission of Msg1; The first condition is the 4-step random access fails N times, the value of N being predefined in the protocol or configured by the first message; Msg1 is used to instruct the terminal to perform repeated transmission, and a first signaling carrying instruction information related to RO frequency hopping is received; The signal quality of the downlink signal is equal to or lower than the first threshold; The first threshold value may be set by the first message, or may also be used as a threshold value for determining whether or not to execute a random access procedure for repeated transmission of Msg3.

[0273] Optionally, the failure of the four-step random access N times In one 4-step random access procedure, the terminal attempts to transmit Msg1 once for N times but does not receive the corresponding Msg2; or In one four-step random access procedure, the terminal transmits Msg1 once and receives the corresponding Msg2 N times, but fails to transmit Msg3; The value of N may be predefined in a protocol or may be configured by the first message.

[0274] Optionally, the first signaling includes DCI or MAC CE or RRC signaling.

[0275] Optionally, the step of determining PRACH resources for Msg1 repetition transmission comprises: determining an SSB or a combination of SSBs associated with the Msg1 repeated transmission according to a pattern of the Msg1 repeated transmission and a second threshold; determining a set of candidate ROs of PRACH resources for the Msg1 repetitive transmission according to a correlation between an SSB or a combination of SSBs associated with the Msg1 repetitive transmission and an RO; determining an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions; The second threshold value is set by the first message, or is also used as a threshold value for selecting correlated SSBs during a random access procedure of Msg3 repeated transmission.

[0276] Optionally, the step of determining an SSB associated with the Msg1 repeated transmission according to the pattern of the Msg1 repeated transmission and the second threshold value includes: In a pattern of Msg1 repeated transmission in which a plurality of ROs are associated with the same SSB, a terminal compares the signal qualities of all detected SSBs with the second threshold and selects an SSB having a signal quality higher than the second threshold as an SSB associated with the Msg1 repeated transmission; Or, when there are a plurality of SSBs whose signal quality is higher than the second threshold, selecting one SSB from the plurality of SSBs as an SSB related to the Msg1 repeated transmission by the terminal or randomly; Alternatively, if there is no SSB whose signal quality is higher than the second threshold, the method includes a step of selecting, by the terminal or randomly, one SSB as an SSB associated with the Msg1 repeated transmission.

[0277] Optionally, the step of determining an SSB combination associated with the Msg1 repeated transmission according to the pattern of the Msg1 repeated transmission and the second threshold value includes: In a pattern of Msg1 repeated transmission in which multiple ROs are associated with different SSBs, the method includes a step of comparing signal quality of SSB combinations with the second threshold and selecting one of the SSB combinations as the SSB combination associated with the Msg1 repeated transmission.

[0278] Optionally, the step of determining an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions comprises: determining a time domain location of the RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions; and determining a frequency domain location of an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions according to the frequency hopping parameters.

[0279] Optionally, the step of determining a time domain location of an RO corresponding to each Msg1 transmission of the Msg1 repeated transmissions comprises: In a pattern of Msg1 repeated transmission in which multiple ROs are associated with the same SSB, the time domain positions of the multiple ROs in the Msg1 repeated transmission correspond to correlation periods between multiple consecutive SSBs and the RO; The correlation period corresponding to the first Msg1 of the repeated transmission of Msg1 is determined by a reference time point, which is predefined by a protocol or determined by configuration in the first message.

[0280] Optionally, the step of determining a time domain location of an RO corresponding to each Msg1 transmission of the Msg1 repeated transmissions comprises: In a pattern of Msg1 repetitive transmission in which multiple ROs are associated with different SSBs, the time domain location of the RO associated with each SSB is within a correlation period between one SSB and the RO.

[0281] Optionally, the step of determining a frequency domain location of an RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions according to the frequency hopping parameters includes: A frequency domain location of an RO of a first Msg1 transmission among the Msg1 repeated transmissions is determined by a rule predefined in a protocol, or by one RO randomly selected from a set of ROs at a time domain location of the first Msg1 transmission; determining a frequency domain location of an RO for an i-th Msg1 transmission among the Msg1 repeated transmissions according to an RO frequency domain location of the i-1-th Msg1 transmission among the Msg1 repeated transmissions and an RO frequency hopping offset; i is a positive integer greater than or equal to 2.

[0282] Optionally, the step of determining a frequency hopping parameter for Msg1 repeated transmission comprises: Determining the RO frequency hopping offset according to a configuration parameter of the correlation between SSB and RO or a rule predefined in a protocol.

[0283] Optionally, the device further comprises: The wireless communication device further includes a second determination unit used for determining that the network side device supports Msg1 repeated transmission when the first configuration information further includes an RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions.

[0284] Optionally, the pattern of the Msg1 repeat transmission is: A pattern in which the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with the same SSB; and a pattern in which the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with one or more different SSBs.

[0285] Optionally, the first message further comprises a plurality of SSB combinations where the RO for the second and subsequent Msg1 transmissions of the Msg1 repetition transmissions and the RO for the first Msg1 transmission of the Msg1 repetition transmissions are associated with one or more different SSBs.

[0286] Optionally, the device further comprises: The method further comprises: a third determining unit, which is used for determining that the Msg1 repeated transmission supports frequency hopping when multiple ROs are deployed in the frequency domain.

[0287] Optionally, the device further comprises: The wireless communication device further includes a fourth determination unit used for determining the number of times of Msg1 repetition transmission according to the number of ROs for the second and subsequent Msg1 transmissions among the Msg1 repetition transmissions in the first configuration information.

[0288] Optionally, the device further comprises: The wireless communication device further includes a fifth determination unit configured by a network side device or used to determine SSBs associated with the second and subsequent Msg1 transmissions of the Msg1 repeated transmissions according to a predetermined SSB pattern.

[0289] Optionally, the first receiving unit: It is used to receive a first message carrying first configuration information for instructing to perform Msg1 repeated transmission in a contention-free random access procedure.

[0290] Optionally, the first configuration information is: Random access type, Msg1 Repeat transmission pattern, Msg1: Number of repeated transmissions Whether to enable RO frequency hopping; RO frequency hopping offset, Contains at least one of the RO sets.

[0291] Optionally, the random access type is: A four-step random access procedure with one transmission of Msg1 and one transmission of Msg3; A four-step random access procedure with one transmission of Msg1 and repeated transmission of Msg3; A four-step random access procedure with repeated transmission of Msg1 and one transmission of Msg3; It includes at least one of the four-step random access procedures of Msg1 repeated transmission and Msg3 repeated transmission.

[0292] Optionally, the first message includes at least one of a system message, a DCI, a MAC CE, and an RRC signaling.

[0293] The time-frequency resource determination device for Msg1 repetitive transmission in the embodiment of the present application may be an electronic device such as an electronic device with an operating system, or an element in an electronic device such as an integrated circuit or chip. The electronic device may be a terminal, or other device other than a terminal. For example, the terminal may include the types of terminal 11 listed above, but is not limited thereto, and the other device may be a server, a network attached storage (NAS), etc., and is not specifically limited in the embodiment of the present application.

[0294] The device for determining the time-frequency resource of Msg1 repeated transmission provided in the embodiment of the present application realizes each step realized in the method embodiment of Figures 2 to 6 and can achieve the same technical effects, and detailed description thereof will be omitted here to avoid repetition.

[0295] FIG. 9 is a schematic diagram 2 of the configuration of a device for determining time-frequency resources for repeated transmission of Msg1 provided in an embodiment of the present application. As shown in FIG. 9, the device 900 for determining time-frequency resources for repeated transmission of Msg1 includes: The first sending unit 910 is used for sending a first message carrying first configuration information of Msg1 repeated transmission to a terminal.

[0296] Optionally, the first configuration information is: Msg1 Repeat transmission pattern, Multiple SSB combinations, Configuration parameters for SSB and RO correlation, Msg1: a first threshold for indicating the trigger threshold for repeated transmission; a second threshold for indicating the selection threshold of the correlation SSB for the Msg1 repetition transmission; Whether to enable RO frequency hopping; RO frequency hopping offset, Number of frequency hops or frequency hopping step size, Msg1: Number of repeated transmissions Msg1: Preamble resource set for repeated transmission; Msg1 includes at least one of the RO masks of repeated transmission.

[0297] Optionally, the device further comprises: The terminal further includes a second transmitting unit, which is used to instruct the terminal to perform Msg1 repeated transmission, and is used to transmit a first signaling carrying instruction information related to RO frequency hopping to the terminal.

[0298] Optionally, the first signaling includes DCI or MAC CE or RRC signaling.

[0299] Optionally, the first configuration information further includes an RO for a second and subsequent Msg1 transmissions among the repeated transmissions of Msg1.

[0300] Optionally, the device further comprises: The mobile station further includes a third transmitting unit adapted to transmit, to the terminal, an SSB pattern for the terminal to determine an SSB associated with the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions.

[0301] Optionally, the first transmitting unit: It is used to send a first message carrying first configuration information for instructing a terminal to perform Msg1 repeated transmission in a contention-free random access procedure.

[0302] Optionally, the first configuration information is: Random access type, Msg1 Repeat transmission pattern, Msg1: Number of repeated transmissions Whether to enable RO frequency hopping; RO frequency hopping offset, Contains at least one of the RO sets.

[0303] Optionally, the random access type is: A four-step random access procedure with one transmission of Msg1 and one transmission of Msg3; A four-step random access procedure with one transmission of Msg1 and repeated transmission of Msg3; A four-step random access procedure with repeated transmission of Msg1 and one transmission of Msg3; It includes at least one of the four-step random access procedures of Msg1 repeated transmission and Msg3 repeated transmission.

[0304] Optionally, the first message includes at least one of a system message, a DCI, a MAC CE, and an RRC signaling.

[0305] The device for determining the time-frequency resource of Msg1 repeated transmission provided in the embodiment of the present application realizes each step implemented in the method embodiment of Figure 7, and can achieve the same technical effect, so detailed description will be omitted here to avoid repetition.

[0306] Optionally, as shown in Fig. 10, an embodiment of the present application further provides a communication device 1000, comprising a processor 1001 and a memory 1002, in which a program or command executable by the processor 1001 is stored, for example, when the communication device 1000 is a terminal, the program or command is executed by the processor 1001 to realize each step of the embodiment of the method for determining time-frequency resource of the Msg1 repeated transmission, and the same technical effect can be achieved. When the communication device 1000 is a network side device, the program or command is executed by the processor 1001 to realize each step of the embodiment of the method for determining time-frequency resource of the Msg1 repeated transmission, and the same technical effect can be achieved, and detailed description thereof will be omitted here to avoid repetition.

[0307] An embodiment of the present application further provides a terminal including: a communication interface for receiving a first message, transmitted from a network side device, carrying first configuration information for Msg1 repeated transmission; and a processor for determining a first time-frequency resource for the Msg1 repeated transmission based on the first configuration information, wherein the step of determining the first time-frequency resource for the Msg1 repeated transmission includes at least one of the following steps: determining whether to perform Msg1 repeated transmission; determining a physical random access channel (PRACH) resource for the Msg1 repeated transmission; determining a frequency hopping parameter for the Msg1 repeated transmission; and determining an RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions.

[0308] This terminal embodiment corresponds to the above terminal-side method embodiment, and each implementation step and realization form of the above method embodiment can be applied to this terminal embodiment to achieve the same technical effects.

[0309] Specifically, FIG. 11 is a schematic diagram of the hardware configuration of a terminal for implementing an embodiment of the present application.

[0310] The terminal 1100 includes at least some of the following components, 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 a processor 1110.

[0311] It is understood by those skilled in the art that the terminal 1100 may further include a power source (e.g., a battery) for powering each element, and the power source may be logically connected to the processor 1110 through a power management system, and the power management system may further realize functions such as charge / discharge management and power consumption management. The configuration of the terminal shown in FIG. 11 is not intended to limit the terminal, and the terminal may include more or less elements than those shown in the drawing, or may combine some elements, or may have a different element arrangement, and detailed description thereof will be omitted here.

[0312] It should be understood that in the embodiment of the present application, the input unit 1104 may include a graphics processing unit (GPU) 11041 for processing image data of static or video captured by an image capture device (e.g., a camera) in a video capture mode or an image capture mode, and a microphone 11042. The display unit 1106 may include a display panel 11061, which may be arranged in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1107 includes at least one of a touch panel 11071 and 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. The other input devices 11072 may include, but are not limited to, a physical keyboard, a function button (e.g., a volume control button, a switch button, etc.), a trackball, a mouse, and a control lever, and detailed description thereof will be omitted here.

[0313] In the embodiment of the present application, the radio frequency unit 1101 can receive downlink data from the network side device and then transmit the data to the processor 1110 for processing, and can also transmit uplink data to the network side device. Typically, the radio frequency unit 1101 includes, but is not limited to, an antenna, an amplifier, a receiver-transmitter, a coupler, a low-noise amplifier, a duplexer, etc.

[0314] The memory 1109 can be used to store software programs, commands, and various data. The memory 1109 may mainly include a first storage area and a second storage area for storing programs and commands, in which the first storage area can store an operating system, applications and commands required for at least one function (e.g., a sound playback function, an image playback function, etc.). The memory 1109 may include a volatile memory or a non-volatile memory, or the memory 1109 may include both a volatile and 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), Synch link Dynamic Random Access Memory (SLDRAM), and Direct Rambus Random Access Memory (DRRAM). Memory 1009 in embodiments of the present application may include, but is not limited to, these and any other suitable types of memory.

[0315] The processor 1110 may include one or more processing units, and may selectively integrate in the processor 1110 an application processor that mainly processes operations related to an operating system, a user interface, applications, etc., and a modem processor that mainly processes wireless communication signals, e.g., a baseband processor. It is understandable that the modem processor may not be integrated in the processor 1110.

[0316] The high frequency unit 1101 is used to receive a first message including first arrangement information of Msg1 repetition transmission, the first message being transmitted from a network side device; The processor 1110 is used to determine a first time-frequency resource for repeated transmission of Msg1 based on the first configuration information, and the step of determining the first time-frequency resource for repeated transmission of Msg1 includes at least one of the following steps: determining whether to perform repeated transmission of Msg1; determining a physical random access channel (PRACH) resource for repeated transmission of Msg1; and determining a frequency hopping parameter for repeated transmission of Msg1.

[0317] In an embodiment of the present application, a terminal determines a first time-frequency resource for repeated transmission of Msg1 based on first configuration information of repeated transmission of Msg1 transmitted from a network side device, thereby realizing repeated transmission of Msg1 and improving the coverage performance of PRACH.

[0318] Optionally, the first configuration information is: Msg1 Repeat transmission pattern, Multiple SSB combinations, Configuration parameters for SSB and RO correlation, Msg1: a first threshold for indicating the trigger threshold for repeated transmission; a second threshold for indicating the selection threshold of the correlation SSB for the Msg1 repetition transmission; Whether to enable RO frequency hopping; RO frequency hopping offset, Number of frequency hops or frequency hopping step size, Msg1: Number of repeated transmissions Msg1: Preamble resource set for repeated transmission; Msg1 includes at least one of the RO masks of repeated transmission.

[0319] Optionally, the pattern of the Msg1 repeat transmission is: Multiple ROs are associated with the same SSB, or This includes patterns where multiple ROs are associated with different SSBs.

[0320] Optionally, the processor 1110 is When a first condition is satisfied, determining to perform Msg1 repeated transmission and determining a PRACH resource for the Msg1 repeated transmission; The first condition is the 4-step random access fails N times, the value of N being predefined in the protocol or configured by the first message; Msg1 is used to instruct the terminal to perform repeated transmission, and a first signaling carrying instruction information related to RO frequency hopping is received; The signal quality of the downlink signal is equal to or lower than the first threshold; The first threshold value may be set by the first message, or may also be used as a threshold value for determining whether or not to execute a random access procedure for repeated transmission of Msg3.

[0321] Optionally, the failure of the four-step random access N times In one 4-step random access procedure, the terminal attempts to transmit Msg1 once for N times but does not receive the corresponding Msg2; or In one four-step random access procedure, the terminal transmits Msg1 once and receives the corresponding Msg2 N times, but fails to transmit Msg3; The value of N may be predefined in a protocol or may be configured by the first message.

[0322] Optionally, the first signaling includes DCI or MAC CE or RRC signaling.

[0323] Optionally, the step of determining PRACH resources for Msg1 repetition transmission comprises: determining an SSB or a combination of SSBs associated with the Msg1 repeated transmission according to a pattern of the Msg1 repeated transmission and a second threshold; determining a set of candidate ROs of PRACH resources for the Msg1 repetitive transmission according to a correlation between an SSB or a combination of SSBs associated with the Msg1 repetitive transmission and an RO; determining an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions; The second threshold value is set by the first message, or is also used as a threshold value for selecting correlated SSBs during a random access procedure of Msg3 repeated transmission.

[0324] Optionally, the step of determining an SSB associated with the Msg1 repeated transmission according to the pattern of the Msg1 repeated transmission and the second threshold value includes: In a pattern of Msg1 repeated transmission in which a plurality of ROs are associated with the same SSB, a terminal compares the signal qualities of all detected SSBs with the second threshold and selects an SSB having a signal quality higher than the second threshold as an SSB associated with the Msg1 repeated transmission; Or, when there are a plurality of SSBs whose signal quality is higher than the second threshold, selecting one SSB from the plurality of SSBs as an SSB related to the Msg1 repeated transmission by the terminal or randomly; Alternatively, if there is no SSB whose signal quality is higher than the second threshold, the method includes a step of selecting, by the terminal or randomly, one SSB as an SSB associated with the Msg1 repeated transmission.

[0325] Optionally, the step of determining an SSB combination associated with the Msg1 repeated transmission according to the pattern of the Msg1 repeated transmission and the second threshold value includes: In a pattern of Msg1 repeated transmission in which multiple ROs are associated with different SSBs, the method includes a step of comparing signal quality of SSB combinations with the second threshold and selecting one of the SSB combinations as the SSB combination associated with the Msg1 repeated transmission.

[0326] Optionally, the step of determining an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions comprises: determining a time domain location of the RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions; and determining a frequency domain location of an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions according to the frequency hopping parameters.

[0327] Optionally, the step of determining a time domain location of an RO corresponding to each Msg1 transmission of the Msg1 repeated transmissions comprises: In a pattern of Msg1 repeated transmission in which multiple ROs are associated with the same SSB, the time domain positions of the multiple ROs in the Msg1 repeated transmission correspond to correlation periods between multiple consecutive SSBs and the RO; The correlation period corresponding to the first Msg1 of the repeated transmission of Msg1 is determined by a reference time point, which is predefined by a protocol or determined by configuration in the first message.

[0328] Optionally, the step of determining a time domain location of an RO corresponding to each Msg1 transmission of the Msg1 repeated transmissions comprises: In a pattern of Msg1 repetitive transmission in which multiple ROs are associated with different SSBs, the time domain location of the RO associated with each SSB is within a correlation period between one SSB and the RO.

[0329] Optionally, the step of determining a frequency domain location of an RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions according to the frequency hopping parameters includes: A frequency domain location of an RO of a first Msg1 transmission among the Msg1 repeated transmissions is determined by a rule predefined in a protocol, or by one RO randomly selected from a set of ROs at a time domain location of the first Msg1 transmission; determining a frequency domain location of an RO for an i-th Msg1 transmission among the Msg1 repeated transmissions according to an RO frequency domain location of the i-1-th Msg1 transmission among the Msg1 repeated transmissions and an RO frequency hopping offset; i is a positive integer greater than or equal to 2.

[0330] Optionally, the step of determining a frequency hopping parameter for Msg1 repeated transmission comprises: Determining the RO frequency hopping offset according to a configuration parameter of the correlation between SSB and RO or a rule predefined in a protocol.

[0331] Optionally, the processor 1110 may further When the first configuration information further includes ROs for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions, the RO is used for determining that the network side device supports Msg1 repeated transmission.

[0332] Optionally, the pattern of the Msg1 repeat transmission is: A pattern in which the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with the same SSB; and a pattern in which the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with one or more different SSBs.

[0333] Optionally, the first message further comprises a plurality of SSB combinations where the RO for the second and subsequent Msg1 transmissions of the Msg1 repetition transmissions and the RO for the first Msg1 transmission of the Msg1 repetition transmissions are associated with one or more different SSBs.

[0334] Optionally, the processor 1110 is further configured to determine that the Msg1 repeated transmission supports frequency hopping when multiple ROs are deployed in the frequency domain.

[0335] Optionally, the processor 1110 is further configured to determine the number of Msg1 repetitions according to the number of ROs for the second and subsequent Msg1 transmissions among the Msg1 repetitions in the first configuration information.

[0336] Optionally, the processor 1110 is further used to determine SSBs associated with the second and subsequent Msg1 transmissions of the Msg1 repeated transmissions according to an SSB pattern configured by the network side equipment or determined in advance.

[0337] Optionally, the high frequency unit 1101 is It is used to receive a first message carrying first configuration information for instructing to perform Msg1 repeated transmission in a contention-free random access procedure.

[0338] Optionally, the first configuration information is: Random access type, Msg1 Repeat transmission pattern, Msg1: Number of repeated transmissions Whether to enable RO frequency hopping; RO frequency hopping offset, Contains at least one of the RO sets.

[0339] Optionally, the random access type is: A four-step random access procedure with one transmission of Msg1 and one transmission of Msg3; A four-step random access procedure with one transmission of Msg1 and repeated transmission of Msg3; A four-step random access procedure with repeated transmission of Msg1 and one transmission of Msg3; It includes at least one of the four-step random access procedures of Msg1 repeated transmission and Msg3 repeated transmission.

[0340] Optionally, the first message includes at least one of a system message, a DCI, a MAC CE, and an RRC signaling.

[0341] In an embodiment of the present application, the terminal determines a first time-frequency resource for Msg1 repetition transmission according to the first configuration information of Msg1 repetition transmission transmitted from the network side device, and obtains frequency diversity gain by selecting ROs at different frequency positions, and can avoid resources used for different Msg1 repetitions from completely overlapping in time-frequency resources, thereby improving the coverage performance of Msg1 repetition transmission and reducing the complexity of PRACH resource allocation.

[0342] An embodiment of the present application further provides a network side device, comprising: a processor; and a communication interface used for sending a first message carrying first configuration information of Msg1 repeated transmission to a terminal.

[0343] The embodiment of the network side equipment corresponds to the embodiment of the above-mentioned network side equipment method, and each implementation step and realization form of the above-mentioned method embodiment can be applied to the embodiment of the network side equipment, and the same technical effects can be achieved.

[0344] Specifically, an embodiment of the present application further provides a network side device. As shown in Fig. 12, the network side device 1200 includes an antenna 1201, a radio frequency device 1202, a baseband device 1203, a processor 1204 and a memory 1205. The antenna 1201 is connected to the radio frequency device 1202. In the uplink direction, the radio frequency device 1202 receives information through the antenna 1201, and transmits the received information to the baseband device 1203 for processing. In the downlink direction, the baseband device 1203 processes the information to be transmitted and transmits it to the radio frequency device 1202, and the radio frequency device 1202 processes the received information before transmitting it through the antenna 1201.

[0345] The method performed by the network side equipment in the above embodiment can be realized in a baseband device 1203, which includes a baseband processor.

[0346] The baseband device 1203 may, for example, include at least one baseband board having multiple chips installed thereon, and as shown in FIG. 12, one of the chips is, for example, a baseband processor connected to a memory 1205 via a bus interface and calling a program in the memory 1205 to perform the operations of the network equipment shown in the above method embodiments.

[0347] The network side device may further include a network interface 1202, which may be, for example, a common public radio interface (CPRI).

[0348] Specifically, the network side device 1200 of the embodiment of the present invention further includes a command or program stored in the memory 1205 and executable by the processor 1204, and the processor 1204 calls the command or program in the memory 1205 to execute the method executed by each module shown in FIG. 9, thereby achieving the same technical effect, and detailed description is omitted here to avoid repetition.

[0349] An embodiment of the present application further provides a readable storage medium having a program or command stored therein, which, when executed by a processor, can realize each step of the embodiment of the method for determining time-frequency resource of the above-mentioned Msg1 repetitive transmission and achieve the same technical effect. In order to avoid repetition, detailed description will be omitted here.

[0350] Wherein, the processor is the processor in the terminal according to 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.

[0351] An embodiment of the present application is a chip comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor executes a program or command to realize each step of the embodiment of the method for determining time-frequency resource of the above-mentioned Msg1 repeat transmission. In order to further provide a chip that can achieve the same technical effect, detailed description will be omitted here to avoid repetition.

[0352] It should be understood that the chip described in the embodiments of the present application may be referred to as a system level chip, a system chip, a chip system, a system on a chip, or the like.

[0353] An embodiment of the present application further provides a computer program / program product stored in a storage medium, which is executed by at least one processor to realize each step of the embodiment of the method for determining time-frequency resource of the above-mentioned Msg1 repetitive transmission, and can achieve the same technical effect. In order to avoid repetition, detailed description will be omitted here.

[0354] An embodiment of the present application further provides a system for determining a time-frequency resource for Msg1 repeated transmission, comprising: a terminal used for performing the steps of the above-mentioned method for determining a time-frequency resource for Msg1 repeated transmission; and a network side device used for performing the steps of the above-mentioned method for determining a time-frequency resource for Msg1 repeated transmission.

[0355] It should be noted that in this specification, the terms "comprise", "consist of" or any other variation thereof are intended to include a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a set of elements includes not only those elements, but also other elements not expressly stated or inherent to such process, method, article, or apparatus. Unless otherwise specified, an element limited by the phrase "comprises a" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element. It should be noted that the scope of the method and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may include performing functions in an essentially simultaneous manner or in the opposite order depending on the functions involved, for example, the described method can be performed in a different order than described, and various steps can be added, omitted, or combined. It should be noted that features described with reference to some examples can be combined with other examples.

[0356] From the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be realized in the form of a combination of software and a necessary common hardware platform, and of course, they can also be realized by hardware, but in many cases the former is a more preferred embodiment. Based on this view, the technical solutions of the present application can be substantially or the part that contributes to the prior art can be embodied in the form of a computer software product, which is stored in a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes a number of instructions that cause a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the embodiments of the present application.

[0357] Although the examples of the present application have been described above with reference to the drawings, the present application is not limited to the above-mentioned specific embodiments, which are merely illustrative and not limiting. Based on the suggestions of the present application, many forms that a person skilled in the art can make without departing from the spirit of the present application and the scope of protection of the claims are all within the scope of protection of the present application.

[0358] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to a Chinese patent application filed on December 24, 2021, bearing application number 202111602745.1 and entitled "Method, apparatus and terminal for determining time-frequency resource for Msg1 repetitive transmission", the entire contents of which are incorporated by reference into this application.

Claims

1. A terminal receives a first message transmitted from a network side device, the first message including first configuration information of Msg1 repeated transmission; The terminal determines a first time-frequency resource for repeated transmission of Msg1 based on the first configuration information; The step of determining a first time-frequency resource for repeated transmission of Msg1 includes: A step of determining whether to perform Msg1 repeated transmission; determining a physical random access channel (PRACH) resource for Msg1 repetition transmission; determining a frequency hopping parameter for the Msg1 repeated transmission.

2. The first arrangement information is Msg1 repeat transmission pattern, A combination of a plurality of synchronization signal blocks (SSBs), A configuration parameter for the correlation between SSB and random access channel transmission opportunities RO; a first threshold for indicating a trigger threshold for Msg1 repeated transmission; A second threshold for indicating a selection threshold of the correlation SSB of the Msg1 repeated transmission; Whether to enable RO frequency hopping; RO frequency hopping offset, Number of frequency hops or frequency hopping step size, Number of times Msg1 is repeated, Msg1 repeated transmission preamble resource set; The method for determining the time-frequency resource of Msg1 repetition transmission according to claim 1 , comprising at least one of an RO mask of Msg1 repetition transmission.

3. The pattern of the Msg1 repeated transmission is as follows: A pattern in which multiple ROs are associated with the same SSB, or The method for determining time-frequency resources of Msg1 repetitive transmission according to claim 2 , wherein a plurality of ROs includes a pattern associated with different SSBs.

4. The step of determining whether to perform Msg1 repeat transmission and determining a physical random access channel (PRACH) resource for Msg1 repeat transmission includes: determining to perform repeated transmission of Msg1 when a first condition is satisfied, and determining a PRACH resource for repeated transmission of Msg1; The first condition is: the four-step random access fails N times, the value of N being predefined in a protocol or configured by the first message; A first signaling is received, which is used to instruct a terminal to perform Msg1 repeated transmission and includes instruction information related to RO frequency hopping; a signal quality of a downlink signal is equal to or lower than the first threshold; 4. A method for determining time-frequency resources for Msg 1 repeated transmission according to claim 1, wherein the first threshold is set by the first message or is also used as a threshold for determining whether or not to execute a random access procedure for Msg 3 repeated transmission.

5. The fact that the four-step random access has failed N times means that In one four-step random access procedure, the terminal attempts to transmit Msg1 once N times but does not receive the corresponding Msg2; or In one four-step random access procedure, the terminal transmits Msg1 once and receives the corresponding Msg2 N times, but fails to transmit Msg3; The method for determining time-frequency resources for Msg1 repetitive transmission according to claim 4, wherein the value of N is predefined in a protocol or configured by the first message.

6. The method of claim 4, wherein the first signaling includes downlink control information (DCI), a media access control layer control element (MAC CE), or a radio resource control (RRC) signaling.

7. The step of determining a PRACH resource for Msg1 repetition transmission comprises: determining an SSB or an SSB combination associated with the Msg1 repeated transmission according to a pattern of the Msg1 repeated transmission and a second threshold value; determining a set of candidate ROs of PRACH resources for the Msg1 repetition transmission according to a correlation between an SSB or SSB combination and an RO associated with the Msg1 repetition transmission; determining an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions; The method for determining the time-frequency resource for Msg1 repetitive transmission according to claim 2, wherein the second threshold is set by the first message or is also used as a threshold for selecting a correlated SSB during a random access procedure for Msg3 repetitive transmission.

8. the step of determining an SSB associated with the Msg1 repeated transmission based on the pattern of the Msg1 repeated transmission and the second threshold value, In a pattern of Msg1 repeated transmission in which a plurality of ROs are associated with the same SSB, a terminal compares the signal qualities of all detected SSBs with the second threshold and selects an SSB having a signal quality higher than the second threshold as an SSB associated with the Msg1 repeated transmission; Alternatively, when there are a plurality of SSBs whose signal quality is higher than the second threshold, selecting one SSB from the plurality of SSBs as an SSB related to the Msg1 repeated transmission by a terminal or randomly; Alternatively, the method for determining the time-frequency resource for the Msg1 repeat transmission according to claim 7 further comprises a step of selecting, by a terminal or randomly, one SSB as the SSB associated with the Msg1 repeat transmission when there is no SSB whose signal quality is higher than the second threshold.

9. the step of determining an SSB combination associated with the Msg1 repeated transmission based on the pattern of the Msg1 repeated transmission and the second threshold value, 8. The method for determining time-frequency resources for Msg1 repeat transmission according to claim 7, comprising the steps of: comparing signal quality of SSB combinations with the second threshold in a pattern of Msg1 repeat transmission in which multiple ROs are associated with different SSBs; and selecting one of the SSB combinations as the SSB combination associated with the Msg1 repeat transmission.

10. The step of determining an RO corresponding to each Msg1 transmission among the repeated transmissions of Msg1 comprises: determining a time domain location of an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions; and determining a frequency domain location of an RO corresponding to each Msg1 transmission among the Msg1 repeated transmissions according to the frequency hopping parameter.

11. determining a time domain location of an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions, In a pattern of Msg1 repeat transmission in which multiple ROs are associated with the same SSB, the time domain positions of the multiple ROs in the Msg1 repeat transmission correspond to correlation periods between multiple consecutive SSBs and the ROs; The method for determining time-frequency resources for repeated Msg1 transmission as described in claim 10, wherein a correlation period corresponding to the first Msg1 of repeated Msg1 transmission is determined by a reference time point, and the reference time point is predefined by a protocol or determined by configuration by the first message.

12. determining a time domain location of an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions, The method for determining the time-frequency resource of Msg1 repeat transmission according to claim 10, comprising: in a pattern of Msg1 repeat transmission in which multiple ROs are associated with different SSBs, the time domain position of the RO associated with each SSB is within a correlation period between one SSB and the RO.

13. determining a frequency domain location of an RO corresponding to each Msg1 transmission among the repeated Msg1 transmissions according to the frequency hopping parameters, a frequency-domain location of an RO of a first Msg1 transmission among the Msg1 repetition transmissions is determined by a rule predefined in a protocol, or by one RO randomly selected from a set of ROs at a time-domain location of the first Msg1 transmission; determining a frequency domain location of an RO for an i-th Msg1 transmission among the Msg1 repeated transmissions according to the RO frequency domain location of the i-1-th Msg1 transmission among the Msg1 repeated transmissions and an RO frequency hopping offset; The method for determining time-frequency resources for Msg1 repeated transmission according to claim 10, wherein i is a positive integer equal to or greater than 2.

14. The step of determining a frequency hopping parameter for Msg1 repetition transmission comprises: The method for determining the time-frequency resource of Msg1 repetitive transmission according to claim 13, comprising: determining the RO frequency hopping offset according to a configuration parameter of correlation between SSB and RO or a rule predefined in a protocol.

15. 3. The method for determining time-frequency resources for Msg1 repeated transmission according to claim 2, further comprising a step of: when the first configuration information further includes an RO for a second and subsequent Msg1 transmissions among the Msg1 repeated transmissions, the terminal determining that the network side equipment supports Msg1 repeated transmission.

16. The pattern of the Msg1 repeated transmission is as follows: a pattern in which the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with the same SSB; The method for determining a time-frequency resource for Msg1 repeated transmission according to claim 15, comprising a pattern in which the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with one or more different SSBs.

17. 17. The method for determining time-frequency resources for Msg1 repeated transmissions as described in claim 16, wherein the first message further includes a plurality of SSB combinations when the RO for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions and the RO for the first Msg1 transmission among the Msg1 repeated transmissions are associated with one or more different SSBs.

18. The method for determining time-frequency resources of Msg1 repetition transmission according to claim 15, further comprising: determining that the Msg1 repetition transmission supports frequency hopping when multiple ROs are configured in the frequency domain.

19. The method for determining time-frequency resources for Msg1 repeated transmission as described in claim 15, further comprising a step of determining the number of Msg1 repeated transmissions based on the number of ROs for the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions in the first configuration information.

20. The method for determining time-frequency resources for Msg1 repeated transmissions as described in claim 15, further comprising a step of determining SSBs associated with the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions according to an SSB pattern configured by a network side device or determined in advance.

21. The step of receiving a first message including first configuration information of Msg1 repeated transmission from a network side device by the terminal includes:

2. The method for determining time-frequency resources for Msg1 repeated transmission according to claim 1, comprising: a step of receiving a first message carrying first configuration information for instructing a terminal to perform Msg1 repeated transmission in a contention-free random access procedure.

22. The first arrangement information is Random access type, Msg1 repeat transmission pattern, Number of times Msg1 is repeated, Whether to enable RO frequency hopping; RO frequency hopping offset, The method for determining the time-frequency resource of Msg1 repetition transmission according to claim 21, comprising at least one of the RO sets.

23. The random access type is A four-step random access procedure consisting of one transmission of Msg1 and one transmission of Msg3; A four-step random access procedure consisting of one transmission of Msg1 and repeated transmission of Msg3; A four-step random access procedure consisting of repeated transmission of Msg1 and one transmission of Msg3; The method for determining a time-frequency resource for Msg1 repeated transmission according to claim 22, comprising at least one of a four-step random access procedure of Msg1 repeated transmission and Msg3 repeated transmission.

24. The method for determining a time-frequency resource for Msg1 repetitive transmission according to claim 1 , wherein the first message includes at least one of a system message, a DCI, a MAC CE, and an RRC signaling.

25. The network side device transmits a first message including first configuration information of Msg1 repeated transmission to a terminal; A method for determining time-frequency resources for Msg1 repeated transmission.

26. The first arrangement information is Msg1 repeat transmission pattern, A combination of a plurality of synchronization signal blocks (SSBs), Configuration parameters of the correlation between SSB and RO; a first threshold for indicating a trigger threshold for Msg1 repeated transmission; A second threshold for indicating a selection threshold of the correlation SSB of the Msg1 repeated transmission; Whether to enable RO frequency hopping; RO frequency hopping offset, Number of frequency hops or frequency hopping step size, Number of times Msg1 is repeated, Msg1 repeated transmission preamble resource set; The method for determining the time-frequency resource of Msg1 repetition transmission according to claim 25, comprising at least one of an RO mask of Msg1 repetition transmission.

27. The method further includes the step of transmitting a first signaling to the terminal, the first signaling being used to instruct the terminal to perform Msg1 repeated transmission and carrying instruction information related to RO frequency hopping; The method for determining time-frequency resources for Msg1 repetitive transmission according to claim 25.

28. The method for determining a time-frequency resource for Msg1 repetitive transmission according to claim 27, wherein the first signaling includes DCI, MAC CE, or RRC signaling.

29. The method for determining time-frequency resources for repeated Msg1 transmission according to claim 25, wherein the first configuration information further includes an RO for a second and subsequent Msg1 transmissions among the repeated Msg1 transmissions.

30. The method for determining a time-frequency resource for Msg1 repeated transmission according to claim 29, further comprising the step of transmitting to a terminal an SSB pattern for the terminal to determine SSBs associated with the second and subsequent Msg1 transmissions among the Msg1 repeated transmissions.

31. The step of transmitting a first message carrying first configuration information of Msg1 repeated transmission to a terminal by a network side device includes: The method for determining time-frequency resources for Msg1 repeat transmission as described in claim 24, comprising a step of a network side device sending a first message to a terminal, the first message carrying first configuration information for instructing the terminal to perform Msg1 repeat transmission in a contention-free random access procedure.

32. The first arrangement information is Random access type, Msg1 repeat transmission pattern, Number of times Msg1 is repeated, Whether to enable RO frequency hopping; RO frequency hopping offset, The method for determining the time-frequency resource of Msg1 repetition transmission according to claim 31, comprising at least one of the RO sets.

33. The random access type is A four-step random access procedure consisting of one transmission of Msg1 and one transmission of Msg3; A four-step random access procedure consisting of one transmission of Msg1 and repeated transmission of Msg3; A four-step random access procedure consisting of repeated transmission of Msg1 and one transmission of Msg3; The method for determining a time-frequency resource for Msg1 repeated transmission according to claim 32, comprising at least one of a four-step random access procedure of Msg1 repeated transmission and Msg3 repeated transmission.

34. The method for determining a time-frequency resource of Msg1 repetitive transmission according to any one of claims 25 to 33, wherein the first message includes at least one of a system message, a downlink control information (DCI), a media access control layer control element (MAC CE), and a radio resource control (RRC) signaling.

35. a first receiving unit for receiving a first message including first arrangement information of Msg1 repeated transmission, the first message being transmitted from a network side device; a first determination unit used to determine a first time-frequency resource for repeated transmission of Msg1 based on the first configuration information; determining a first time-frequency resource for repeated transmission of the Msg1; determining whether to perform repeated transmission of Msg1; determining a physical random access channel (PRACH) resource for Msg1 repetition transmission; determining a frequency hopping parameter of the Msg1 repetitive transmission.

36. A device for determining time-frequency resources for Msg1 repeated transmission, comprising: a first transmitting unit used for transmitting a first message carrying first configuration information for Msg1 repeated transmission to a terminal.

37. A terminal comprising a processor and a memory, wherein a program or command executable by the processor is stored in the memory, and when the program or command is executed by the processor, the terminal realizes the steps of the method for determining time-frequency resources for Msg1 repetitive transmission described in any one of claims 1 to 24.

38. A network side device comprising a processor and a memory, wherein a program or command executable by the processor is stored in the memory, and when the program or command is executed by the processor, the network side device realizes the steps of a method for determining a time-frequency resource for Msg1 repetitive transmission described in any one of claims 25 to 34.

39. A readable storage medium on which a program or command is stored, which, when executed by a processor, realizes steps of a method for determining a time-frequency resource for Msg1 repeated transmission as described in any one of claims 1 to 24, or realizes steps of a method for determining a time-frequency resource for Msg1 repeated transmission as described in any one of claims 25 to 34.

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